drivers/platform/x86/thinkpad_acpi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  */
   8
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10
  11 #define TPACPI_VERSION "0.26"
  12 #define TPACPI_SYSFS_VERSION 0x030000
  13
  14 /*
  15  *  Changelog:
  16  *  2007-10-20          changelog trimmed down
  17  *
  18  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  19  *                      drivers/misc.
  20  *
  21  *  2006-11-22  0.13    new maintainer
  22  *                      changelog now lives in git commit history, and will
  23  *                      not be updated further in-file.
  24  *
  25  *  2005-03-17  0.11    support for 600e, 770x
  26  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  27  *
  28  *  2005-01-16  0.9     use MODULE_VERSION
  29  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  30  *                      fix parameter passing on module loading
  31  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  32  *                          thanks to Jim Radford <radford@blackbean.org>
  33  *  2004-11-08  0.8     fix init error case, don't return from a macro
  34  *                          thanks to Chris Wright <chrisw@osdl.org>
  35  */
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/types.h>
  41 #include <linux/string.h>
  42 #include <linux/list.h>
  43 #include <linux/mutex.h>
  44 #include <linux/sched.h>
  45 #include <linux/sched/signal.h>
  46 #include <linux/kthread.h>
  47 #include <linux/freezer.h>
  48 #include <linux/delay.h>
  49 #include <linux/slab.h>
  50 #include <linux/nvram.h>
  51 #include <linux/proc_fs.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/sysfs.h>
  54 #include <linux/backlight.h>
  55 #include <linux/bitops.h>
  56 #include <linux/fb.h>
  57 #include <linux/platform_device.h>
  58 #include <linux/hwmon.h>
  59 #include <linux/hwmon-sysfs.h>
  60 #include <linux/input.h>
  61 #include <linux/leds.h>
  62 #include <linux/rfkill.h>
  63 #include <linux/dmi.h>
  64 #include <linux/jiffies.h>
  65 #include <linux/workqueue.h>
  66 #include <linux/acpi.h>
  67 #include <linux/pci.h>
  68 #include <linux/power_supply.h>
  69 #include <sound/core.h>
  70 #include <sound/control.h>
  71 #include <sound/initval.h>
  72 #include <linux/uaccess.h>
  73 #include <acpi/battery.h>
  74 #include <acpi/video.h>
  75
  76 /* ThinkPad CMOS commands */
  77 #define TP_CMOS_VOLUME_DOWN     0
  78 #define TP_CMOS_VOLUME_UP       1
  79 #define TP_CMOS_VOLUME_MUTE     2
  80 #define TP_CMOS_BRIGHTNESS_UP   4
  81 #define TP_CMOS_BRIGHTNESS_DOWN 5
  82 #define TP_CMOS_THINKLIGHT_ON   12
  83 #define TP_CMOS_THINKLIGHT_OFF  13
  84
  85 /* NVRAM Addresses */
  86 enum tp_nvram_addr {
  87         TP_NVRAM_ADDR_HK2               = 0x57,
  88         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  89         TP_NVRAM_ADDR_VIDEO             = 0x59,
  90         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  91         TP_NVRAM_ADDR_MIXER             = 0x60,
  92 };
  93
  94 /* NVRAM bit masks */
  95 enum {
  96         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
  97         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
  98         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
  99         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 100         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 101         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 102         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 103         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 104         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 105         TP_NVRAM_MASK_MUTE              = 0x40,
 106         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 107         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 108         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 109 };
 110
 111 /* Misc NVRAM-related */
 112 enum {
 113         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
 114 };
 115
 116 /* ACPI HIDs */
 117 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
 118 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
 119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID  "LEN0268"
 120 #define TPACPI_ACPI_EC_HID              "PNP0C09"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /* HKEY events */
 149 enum tpacpi_hkey_event_t {
 150         /* Hotkey-related */
 151         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 152         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 153         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 154         TP_HKEY_EV_KBD_LIGHT            = 0x1012, /* Thinklight/kbd backlight */
 155         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 156         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 157         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 158
 159         /* Reasons for waking up from S3/S4 */
 160         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 161         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 162         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 163         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 164         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 165         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 166
 167         /* Auto-sleep after eject request */
 168         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 169         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 170
 171         /* Misc bay events */
 172         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 173         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
 174                                                      or port replicator */
 175         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
 176                                                      dock or port replicator */
 177
 178         /* User-interface events */
 179         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 180         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 181         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 182         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 183         TP_HKEY_EV_TABLET_CHANGED       = 0x60c0, /* X1 Yoga (2016):
 184                                                    * enter/leave tablet mode
 185                                                    */
 186         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 187         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 188         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 189
 190         /* Key-related user-interface events */
 191         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
 192         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
 193         TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
 194
 195         /* Thermal events */
 196         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 197         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 198         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 199         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 200         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* windows; thermal table changed */
 201         TP_HKEY_EV_THM_CSM_COMPLETED    = 0x6032, /* windows; thermal control set
 202                                                    * command completed. Related to
 203                                                    * AML DYTC */
 204         TP_HKEY_EV_THM_TRANSFM_CHANGED  = 0x60F0, /* windows; thermal transformation
 205                                                    * changed. Related to AML GMTS */
 206
 207         /* AC-related events */
 208         TP_HKEY_EV_AC_CHANGED           = 0x6040, /* AC status changed */
 209
 210         /* Further user-interface events */
 211         TP_HKEY_EV_PALM_DETECTED        = 0x60b0, /* palm hoveres keyboard */
 212         TP_HKEY_EV_PALM_UNDETECTED      = 0x60b1, /* palm removed */
 213
 214         /* Misc */
 215         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 216 };
 217
 218 /****************************************************************************
 219  * Main driver
 220  */
 221
 222 #define TPACPI_NAME "thinkpad"
 223 #define TPACPI_DESC "ThinkPad ACPI Extras"
 224 #define TPACPI_FILE TPACPI_NAME "_acpi"
 225 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 227
 228 #define TPACPI_PROC_DIR "ibm"
 229 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 230 #define TPACPI_DRVR_NAME TPACPI_FILE
 231 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 233
 234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 235 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 236
 237 #define TPACPI_MAX_ACPI_ARGS 3
 238
 239 /* Debugging printk groups */
 240 #define TPACPI_DBG_ALL          0xffff
 241 #define TPACPI_DBG_DISCLOSETASK 0x8000
 242 #define TPACPI_DBG_INIT         0x0001
 243 #define TPACPI_DBG_EXIT         0x0002
 244 #define TPACPI_DBG_RFKILL       0x0004
 245 #define TPACPI_DBG_HKEY         0x0008
 246 #define TPACPI_DBG_FAN          0x0010
 247 #define TPACPI_DBG_BRGHT        0x0020
 248 #define TPACPI_DBG_MIXER        0x0040
 249
 250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 253
 254
 255 /****************************************************************************
 256  * Driver-wide structs and misc. variables
 257  */
 258
 259 struct ibm_struct;
 260
 261 struct tp_acpi_drv_struct {
 262         const struct acpi_device_id *hid;
 263         struct acpi_driver *driver;
 264
 265         void (*notify) (struct ibm_struct *, u32);
 266         acpi_handle *handle;
 267         u32 type;
 268         struct acpi_device *device;
 269 };
 270
 271 struct ibm_struct {
 272         char *name;
 273
 274         int (*read) (struct seq_file *);
 275         int (*write) (char *);
 276         void (*exit) (void);
 277         void (*resume) (void);
 278         void (*suspend) (void);
 279         void (*shutdown) (void);
 280
 281         struct list_head all_drivers;
 282
 283         struct tp_acpi_drv_struct *acpi;
 284
 285         struct {
 286                 u8 acpi_driver_registered:1;
 287                 u8 acpi_notify_installed:1;
 288                 u8 proc_created:1;
 289                 u8 init_called:1;
 290                 u8 experimental:1;
 291         } flags;
 292 };
 293
 294 struct ibm_init_struct {
 295         char param[32];
 296
 297         int (*init) (struct ibm_init_struct *);
 298         umode_t base_procfs_mode;
 299         struct ibm_struct *data;
 300 };
 301
 302 static struct {
 303         u32 bluetooth:1;
 304         u32 hotkey:1;
 305         u32 hotkey_mask:1;
 306         u32 hotkey_wlsw:1;
 307         enum {
 308                 TP_HOTKEY_TABLET_NONE = 0,
 309                 TP_HOTKEY_TABLET_USES_MHKG,
 310                 TP_HOTKEY_TABLET_USES_GMMS,
 311         } hotkey_tablet;
 312         u32 kbdlight:1;
 313         u32 light:1;
 314         u32 light_status:1;
 315         u32 bright_acpimode:1;
 316         u32 bright_unkfw:1;
 317         u32 wan:1;
 318         u32 uwb:1;
 319         u32 fan_ctrl_status_undef:1;
 320         u32 second_fan:1;
 321         u32 beep_needs_two_args:1;
 322         u32 mixer_no_level_control:1;
 323         u32 battery_force_primary:1;
 324         u32 input_device_registered:1;
 325         u32 platform_drv_registered:1;
 326         u32 platform_drv_attrs_registered:1;
 327         u32 sensors_pdrv_registered:1;
 328         u32 sensors_pdrv_attrs_registered:1;
 329         u32 sensors_pdev_attrs_registered:1;
 330         u32 hotkey_poll_active:1;
 331         u32 has_adaptive_kbd:1;
 332 } tp_features;
 333
 334 static struct {
 335         u16 hotkey_mask_ff:1;
 336         u16 volume_ctrl_forbidden:1;
 337 } tp_warned;
 338
 339 struct thinkpad_id_data {
 340         unsigned int vendor;    /* ThinkPad vendor:
 341                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 342
 343         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 344         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 345
 346         u32 bios_model;         /* 1Y = 0x3159, 0 = unknown */
 347         u32 ec_model;
 348         u16 bios_release;       /* 1ZETK1WW = 0x4b31, 0 = unknown */
 349         u16 ec_release;
 350
 351         char *model_str;        /* ThinkPad T43 */
 352         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 353 };
 354 static struct thinkpad_id_data thinkpad_id;
 355
 356 static enum {
 357         TPACPI_LIFE_INIT = 0,
 358         TPACPI_LIFE_RUNNING,
 359         TPACPI_LIFE_EXITING,
 360 } tpacpi_lifecycle;
 361
 362 static int experimental;
 363 static u32 dbg_level;
 364
 365 static struct workqueue_struct *tpacpi_wq;
 366
 367 enum led_status_t {
 368         TPACPI_LED_OFF = 0,
 369         TPACPI_LED_ON,
 370         TPACPI_LED_BLINK,
 371 };
 372
 373 /* tpacpi LED class */
 374 struct tpacpi_led_classdev {
 375         struct led_classdev led_classdev;
 376         int led;
 377 };
 378
 379 /* brightness level capabilities */
 380 static unsigned int bright_maxlvl;      /* 0 = unknown */
 381
 382 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 383 static int dbg_wlswemul;
 384 static bool tpacpi_wlsw_emulstate;
 385 static int dbg_bluetoothemul;
 386 static bool tpacpi_bluetooth_emulstate;
 387 static int dbg_wwanemul;
 388 static bool tpacpi_wwan_emulstate;
 389 static int dbg_uwbemul;
 390 static bool tpacpi_uwb_emulstate;
 391 #endif
 392
 393
 394 /*************************************************************************
 395  *  Debugging helpers
 396  */
 397
 398 #define dbg_printk(a_dbg_level, format, arg...)                         \
 399 do {                                                                    \
 400         if (dbg_level & (a_dbg_level))                                  \
 401                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 402                        __func__, ##arg);                                \
 403 } while (0)
 404
 405 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 406 #define vdbg_printk dbg_printk
 407 static const char *str_supported(int is_supported);
 408 #else
 409 static inline const char *str_supported(int is_supported) { return ""; }
 410 #define vdbg_printk(a_dbg_level, format, arg...)        \
 411         do { if (0) no_printk(format, ##arg); } while (0)
 412 #endif
 413
 414 static void tpacpi_log_usertask(const char * const what)
 415 {
 416         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 417                what, task_tgid_vnr(current));
 418 }
 419
 420 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 421 do {                                                                    \
 422         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 423                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 424                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 425                        what, task_tgid_vnr(current), ## arg);           \
 426         }                                                               \
 427 } while (0)
 428
 429 /*
 430  * Quirk handling helpers
 431  *
 432  * ThinkPad IDs and versions seen in the field so far are
 433  * two or three characters from the set [0-9A-Z], i.e. base 36.
 434  *
 435  * We use values well outside that range as specials.
 436  */
 437
 438 #define TPACPI_MATCH_ANY                0xffffffffU
 439 #define TPACPI_MATCH_ANY_VERSION        0xffffU
 440 #define TPACPI_MATCH_UNKNOWN            0U
 441
 442 /* TPID('1', 'Y') == 0x3159 */
 443 #define TPID(__c1, __c2)        (((__c1) << 8) | (__c2))
 444 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3))
 445 #define TPVER TPID
 446
 447 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 448         { .vendor = PCI_VENDOR_ID_IBM,          \
 449           .bios = TPID(__id1, __id2),           \
 450           .ec = TPACPI_MATCH_ANY,               \
 451           .quirks = (__quirk) }
 452
 453 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 454         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 455           .bios = TPID(__id1, __id2),           \
 456           .ec = TPACPI_MATCH_ANY,               \
 457           .quirks = (__quirk) }
 458
 459 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
 460         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 461           .bios = TPID3(__id1, __id2, __id3),   \
 462           .ec = TPACPI_MATCH_ANY,               \
 463           .quirks = (__quirk) }
 464
 465 #define TPACPI_QEC_IBM(__id1, __id2, __quirk)   \
 466         { .vendor = PCI_VENDOR_ID_IBM,          \
 467           .bios = TPACPI_MATCH_ANY,             \
 468           .ec = TPID(__id1, __id2),             \
 469           .quirks = (__quirk) }
 470
 471 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 472         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 473           .bios = TPACPI_MATCH_ANY,             \
 474           .ec = TPID(__id1, __id2),             \
 475           .quirks = (__quirk) }
 476
 477 struct tpacpi_quirk {
 478         unsigned int vendor;
 479         u32 bios;
 480         u32 ec;
 481         unsigned long quirks;
 482 };
 483
 484 /**
 485  * tpacpi_check_quirks() - search BIOS/EC version on a list
 486  * @qlist:              array of &struct tpacpi_quirk
 487  * @qlist_size:         number of elements in @qlist
 488  *
 489  * Iterates over a quirks list until one is found that matches the
 490  * ThinkPad's vendor, BIOS and EC model.
 491  *
 492  * Returns 0 if nothing matches, otherwise returns the quirks field of
 493  * the matching &struct tpacpi_quirk entry.
 494  *
 495  * The match criteria is: vendor, ec and bios much match.
 496  */
 497 static unsigned long __init tpacpi_check_quirks(
 498                         const struct tpacpi_quirk *qlist,
 499                         unsigned int qlist_size)
 500 {
 501         while (qlist_size) {
 502                 if ((qlist->vendor == thinkpad_id.vendor ||
 503                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 504                     (qlist->bios == thinkpad_id.bios_model ||
 505                                 qlist->bios == TPACPI_MATCH_ANY) &&
 506                     (qlist->ec == thinkpad_id.ec_model ||
 507                                 qlist->ec == TPACPI_MATCH_ANY))
 508                         return qlist->quirks;
 509
 510                 qlist_size--;
 511                 qlist++;
 512         }
 513         return 0;
 514 }
 515
 516 static inline bool __pure __init tpacpi_is_lenovo(void)
 517 {
 518         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 519 }
 520
 521 static inline bool __pure __init tpacpi_is_ibm(void)
 522 {
 523         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 524 }
 525
 526 /****************************************************************************
 527  ****************************************************************************
 528  *
 529  * ACPI Helpers and device model
 530  *
 531  ****************************************************************************
 532  ****************************************************************************/
 533
 534 /*************************************************************************
 535  * ACPI basic handles
 536  */
 537
 538 static acpi_handle root_handle;
 539 static acpi_handle ec_handle;
 540
 541 #define TPACPI_HANDLE(object, parent, paths...)                 \
 542         static acpi_handle  object##_handle;                    \
 543         static const acpi_handle * const object##_parent __initconst =  \
 544                                                 &parent##_handle; \
 545         static char *object##_paths[] __initdata = { paths }
 546
 547 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 548 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 549
 550 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 551                                         /* T4x, X31, X40 */
 552            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 553            "\\CMS",             /* R40, R40e */
 554            );                   /* all others */
 555
 556 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 557            "^HKEY",             /* R30, R31 */
 558            "HKEY",              /* all others */
 559            );                   /* 570 */
 560
 561 /*************************************************************************
 562  * ACPI helpers
 563  */
 564
 565 static int acpi_evalf(acpi_handle handle,
 566                       int *res, char *method, char *fmt, ...)
 567 {
 568         char *fmt0 = fmt;
 569         struct acpi_object_list params;
 570         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 571         struct acpi_buffer result, *resultp;
 572         union acpi_object out_obj;
 573         acpi_status status;
 574         va_list ap;
 575         char res_type;
 576         int success;
 577         int quiet;
 578
 579         if (!*fmt) {
 580                 pr_err("acpi_evalf() called with empty format\n");
 581                 return 0;
 582         }
 583
 584         if (*fmt == 'q') {
 585                 quiet = 1;
 586                 fmt++;
 587         } else
 588                 quiet = 0;
 589
 590         res_type = *(fmt++);
 591
 592         params.count = 0;
 593         params.pointer = &in_objs[0];
 594
 595         va_start(ap, fmt);
 596         while (*fmt) {
 597                 char c = *(fmt++);
 598                 switch (c) {
 599                 case 'd':       /* int */
 600                         in_objs[params.count].integer.value = va_arg(ap, int);
 601                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 602                         break;
 603                         /* add more types as needed */
 604                 default:
 605                         pr_err("acpi_evalf() called with invalid format character '%c'\n",
 606                                c);
 607                         va_end(ap);
 608                         return 0;
 609                 }
 610         }
 611         va_end(ap);
 612
 613         if (res_type != 'v') {
 614                 result.length = sizeof(out_obj);
 615                 result.pointer = &out_obj;
 616                 resultp = &result;
 617         } else
 618                 resultp = NULL;
 619
 620         status = acpi_evaluate_object(handle, method, &params, resultp);
 621
 622         switch (res_type) {
 623         case 'd':               /* int */
 624                 success = (status == AE_OK &&
 625                            out_obj.type == ACPI_TYPE_INTEGER);
 626                 if (success && res)
 627                         *res = out_obj.integer.value;
 628                 break;
 629         case 'v':               /* void */
 630                 success = status == AE_OK;
 631                 break;
 632                 /* add more types as needed */
 633         default:
 634                 pr_err("acpi_evalf() called with invalid format character '%c'\n",
 635                        res_type);
 636                 return 0;
 637         }
 638
 639         if (!success && !quiet)
 640                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 641                        method, fmt0, acpi_format_exception(status));
 642
 643         return success;
 644 }
 645
 646 static int acpi_ec_read(int i, u8 *p)
 647 {
 648         int v;
 649
 650         if (ecrd_handle) {
 651                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 652                         return 0;
 653                 *p = v;
 654         } else {
 655                 if (ec_read(i, p) < 0)
 656                         return 0;
 657         }
 658
 659         return 1;
 660 }
 661
 662 static int acpi_ec_write(int i, u8 v)
 663 {
 664         if (ecwr_handle) {
 665                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 666                         return 0;
 667         } else {
 668                 if (ec_write(i, v) < 0)
 669                         return 0;
 670         }
 671
 672         return 1;
 673 }
 674
 675 static int issue_thinkpad_cmos_command(int cmos_cmd)
 676 {
 677         if (!cmos_handle)
 678                 return -ENXIO;
 679
 680         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 681                 return -EIO;
 682
 683         return 0;
 684 }
 685
 686 /*************************************************************************
 687  * ACPI device model
 688  */
 689
 690 #define TPACPI_ACPIHANDLE_INIT(object) \
 691         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 692                 object##_paths, ARRAY_SIZE(object##_paths))
 693
 694 static void __init drv_acpi_handle_init(const char *name,
 695                            acpi_handle *handle, const acpi_handle parent,
 696                            char **paths, const int num_paths)
 697 {
 698         int i;
 699         acpi_status status;
 700
 701         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 702                 name);
 703
 704         for (i = 0; i < num_paths; i++) {
 705                 status = acpi_get_handle(parent, paths[i], handle);
 706                 if (ACPI_SUCCESS(status)) {
 707                         dbg_printk(TPACPI_DBG_INIT,
 708                                    "Found ACPI handle %s for %s\n",
 709                                    paths[i], name);
 710                         return;
 711                 }
 712         }
 713
 714         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 715                     name);
 716         *handle = NULL;
 717 }
 718
 719 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 720                         u32 level, void *context, void **return_value)
 721 {
 722         struct acpi_device *dev;
 723         if (!strcmp(context, "video")) {
 724                 if (acpi_bus_get_device(handle, &dev))
 725                         return AE_OK;
 726                 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
 727                         return AE_OK;
 728         }
 729
 730         *(acpi_handle *)return_value = handle;
 731
 732         return AE_CTRL_TERMINATE;
 733 }
 734
 735 static void __init tpacpi_acpi_handle_locate(const char *name,
 736                 const char *hid,
 737                 acpi_handle *handle)
 738 {
 739         acpi_status status;
 740         acpi_handle device_found;
 741
 742         BUG_ON(!name || !handle);
 743         vdbg_printk(TPACPI_DBG_INIT,
 744                         "trying to locate ACPI handle for %s, using HID %s\n",
 745                         name, hid ? hid : "NULL");
 746
 747         memset(&device_found, 0, sizeof(device_found));
 748         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 749                                   (void *)name, &device_found);
 750
 751         *handle = NULL;
 752
 753         if (ACPI_SUCCESS(status)) {
 754                 *handle = device_found;
 755                 dbg_printk(TPACPI_DBG_INIT,
 756                            "Found ACPI handle for %s\n", name);
 757         } else {
 758                 vdbg_printk(TPACPI_DBG_INIT,
 759                             "Could not locate an ACPI handle for %s: %s\n",
 760                             name, acpi_format_exception(status));
 761         }
 762 }
 763
 764 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 765 {
 766         struct ibm_struct *ibm = data;
 767
 768         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 769                 return;
 770
 771         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 772                 return;
 773
 774         ibm->acpi->notify(ibm, event);
 775 }
 776
 777 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 778 {
 779         acpi_status status;
 780         int rc;
 781
 782         BUG_ON(!ibm->acpi);
 783
 784         if (!*ibm->acpi->handle)
 785                 return 0;
 786
 787         vdbg_printk(TPACPI_DBG_INIT,
 788                 "setting up ACPI notify for %s\n", ibm->name);
 789
 790         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 791         if (rc < 0) {
 792                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 793                 return -ENODEV;
 794         }
 795
 796         ibm->acpi->device->driver_data = ibm;
 797         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 798                 TPACPI_ACPI_EVENT_PREFIX,
 799                 ibm->name);
 800
 801         status = acpi_install_notify_handler(*ibm->acpi->handle,
 802                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 803         if (ACPI_FAILURE(status)) {
 804                 if (status == AE_ALREADY_EXISTS) {
 805                         pr_notice("another device driver is already handling %s events\n",
 806                                   ibm->name);
 807                 } else {
 808                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 809                                ibm->name, acpi_format_exception(status));
 810                 }
 811                 return -ENODEV;
 812         }
 813         ibm->flags.acpi_notify_installed = 1;
 814         return 0;
 815 }
 816
 817 static int __init tpacpi_device_add(struct acpi_device *device)
 818 {
 819         return 0;
 820 }
 821
 822 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 823 {
 824         int rc;
 825
 826         dbg_printk(TPACPI_DBG_INIT,
 827                 "registering %s as an ACPI driver\n", ibm->name);
 828
 829         BUG_ON(!ibm->acpi);
 830
 831         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 832         if (!ibm->acpi->driver) {
 833                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 834                 return -ENOMEM;
 835         }
 836
 837         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 838         ibm->acpi->driver->ids = ibm->acpi->hid;
 839
 840         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 841
 842         rc = acpi_bus_register_driver(ibm->acpi->driver);
 843         if (rc < 0) {
 844                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 845                        ibm->name, rc);
 846                 kfree(ibm->acpi->driver);
 847                 ibm->acpi->driver = NULL;
 848         } else if (!rc)
 849                 ibm->flags.acpi_driver_registered = 1;
 850
 851         return rc;
 852 }
 853
 854
 855 /****************************************************************************
 856  ****************************************************************************
 857  *
 858  * Procfs Helpers
 859  *
 860  ****************************************************************************
 861  ****************************************************************************/
 862
 863 static int dispatch_proc_show(struct seq_file *m, void *v)
 864 {
 865         struct ibm_struct *ibm = m->private;
 866
 867         if (!ibm || !ibm->read)
 868                 return -EINVAL;
 869         return ibm->read(m);
 870 }
 871
 872 static int dispatch_proc_open(struct inode *inode, struct file *file)
 873 {
 874         return single_open(file, dispatch_proc_show, PDE_DATA(inode));
 875 }
 876
 877 static ssize_t dispatch_proc_write(struct file *file,
 878                         const char __user *userbuf,
 879                         size_t count, loff_t *pos)
 880 {
 881         struct ibm_struct *ibm = PDE_DATA(file_inode(file));
 882         char *kernbuf;
 883         int ret;
 884
 885         if (!ibm || !ibm->write)
 886                 return -EINVAL;
 887         if (count > PAGE_SIZE - 2)
 888                 return -EINVAL;
 889
 890         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 891         if (!kernbuf)
 892                 return -ENOMEM;
 893
 894         if (copy_from_user(kernbuf, userbuf, count)) {
 895                 kfree(kernbuf);
 896                 return -EFAULT;
 897         }
 898
 899         kernbuf[count] = 0;
 900         strcat(kernbuf, ",");
 901         ret = ibm->write(kernbuf);
 902         if (ret == 0)
 903                 ret = count;
 904
 905         kfree(kernbuf);
 906
 907         return ret;
 908 }
 909
 910 static const struct proc_ops dispatch_proc_ops = {
 911         .proc_open      = dispatch_proc_open,
 912         .proc_read      = seq_read,
 913         .proc_lseek     = seq_lseek,
 914         .proc_release   = single_release,
 915         .proc_write     = dispatch_proc_write,
 916 };
 917
 918 static char *next_cmd(char **cmds)
 919 {
 920         char *start = *cmds;
 921         char *end;
 922
 923         while ((end = strchr(start, ',')) && end == start)
 924                 start = end + 1;
 925
 926         if (!end)
 927                 return NULL;
 928
 929         *end = 0;
 930         *cmds = end + 1;
 931         return start;
 932 }
 933
 934
 935 /****************************************************************************
 936  ****************************************************************************
 937  *
 938  * Device model: input, hwmon and platform
 939  *
 940  ****************************************************************************
 941  ****************************************************************************/
 942
 943 static struct platform_device *tpacpi_pdev;
 944 static struct platform_device *tpacpi_sensors_pdev;
 945 static struct device *tpacpi_hwmon;
 946 static struct input_dev *tpacpi_inputdev;
 947 static struct mutex tpacpi_inputdev_send_mutex;
 948 static LIST_HEAD(tpacpi_all_drivers);
 949
 950 #ifdef CONFIG_PM_SLEEP
 951 static int tpacpi_suspend_handler(struct device *dev)
 952 {
 953         struct ibm_struct *ibm, *itmp;
 954
 955         list_for_each_entry_safe(ibm, itmp,
 956                                  &tpacpi_all_drivers,
 957                                  all_drivers) {
 958                 if (ibm->suspend)
 959                         (ibm->suspend)();
 960         }
 961
 962         return 0;
 963 }
 964
 965 static int tpacpi_resume_handler(struct device *dev)
 966 {
 967         struct ibm_struct *ibm, *itmp;
 968
 969         list_for_each_entry_safe(ibm, itmp,
 970                                  &tpacpi_all_drivers,
 971                                  all_drivers) {
 972                 if (ibm->resume)
 973                         (ibm->resume)();
 974         }
 975
 976         return 0;
 977 }
 978 #endif
 979
 980 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
 981                          tpacpi_suspend_handler, tpacpi_resume_handler);
 982
 983 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 984 {
 985         struct ibm_struct *ibm, *itmp;
 986
 987         list_for_each_entry_safe(ibm, itmp,
 988                                  &tpacpi_all_drivers,
 989                                  all_drivers) {
 990                 if (ibm->shutdown)
 991                         (ibm->shutdown)();
 992         }
 993 }
 994
 995 static struct platform_driver tpacpi_pdriver = {
 996         .driver = {
 997                 .name = TPACPI_DRVR_NAME,
 998                 .pm = &tpacpi_pm,
 999         },
1000         .shutdown = tpacpi_shutdown_handler,
1001 };
1002
1003 static struct platform_driver tpacpi_hwmon_pdriver = {
1004         .driver = {
1005                 .name = TPACPI_HWMON_DRVR_NAME,
1006         },
1007 };
1008
1009 /*************************************************************************
1010  * sysfs support helpers
1011  */
1012
1013 struct attribute_set {
1014         unsigned int members, max_members;
1015         struct attribute_group group;
1016 };
1017
1018 struct attribute_set_obj {
1019         struct attribute_set s;
1020         struct attribute *a;
1021 } __attribute__((packed));
1022
1023 static struct attribute_set *create_attr_set(unsigned int max_members,
1024                                                 const char *name)
1025 {
1026         struct attribute_set_obj *sobj;
1027
1028         if (max_members == 0)
1029                 return NULL;
1030
1031         /* Allocates space for implicit NULL at the end too */
1032         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1033                     max_members * sizeof(struct attribute *),
1034                     GFP_KERNEL);
1035         if (!sobj)
1036                 return NULL;
1037         sobj->s.max_members = max_members;
1038         sobj->s.group.attrs = &sobj->a;
1039         sobj->s.group.name = name;
1040
1041         return &sobj->s;
1042 }
1043
1044 #define destroy_attr_set(_set) \
1045         kfree(_set);
1046
1047 /* not multi-threaded safe, use it in a single thread per set */
1048 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1049 {
1050         if (!s || !attr)
1051                 return -EINVAL;
1052
1053         if (s->members >= s->max_members)
1054                 return -ENOMEM;
1055
1056         s->group.attrs[s->members] = attr;
1057         s->members++;
1058
1059         return 0;
1060 }
1061
1062 static int add_many_to_attr_set(struct attribute_set *s,
1063                         struct attribute **attr,
1064                         unsigned int count)
1065 {
1066         int i, res;
1067
1068         for (i = 0; i < count; i++) {
1069                 res = add_to_attr_set(s, attr[i]);
1070                 if (res)
1071                         return res;
1072         }
1073
1074         return 0;
1075 }
1076
1077 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1078 {
1079         sysfs_remove_group(kobj, &s->group);
1080         destroy_attr_set(s);
1081 }
1082
1083 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1084         sysfs_create_group(_kobj, &_attr_set->group)
1085
1086 static int parse_strtoul(const char *buf,
1087                 unsigned long max, unsigned long *value)
1088 {
1089         char *endp;
1090
1091         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1092         endp = skip_spaces(endp);
1093         if (*endp || *value > max)
1094                 return -EINVAL;
1095
1096         return 0;
1097 }
1098
1099 static void tpacpi_disable_brightness_delay(void)
1100 {
1101         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1102                 pr_notice("ACPI backlight control delay disabled\n");
1103 }
1104
1105 static void printk_deprecated_attribute(const char * const what,
1106                                         const char * const details)
1107 {
1108         tpacpi_log_usertask("deprecated sysfs attribute");
1109         pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1110                 what, details);
1111 }
1112
1113 /*************************************************************************
1114  * rfkill and radio control support helpers
1115  */
1116
1117 /*
1118  * ThinkPad-ACPI firmware handling model:
1119  *
1120  * WLSW (master wireless switch) is event-driven, and is common to all
1121  * firmware-controlled radios.  It cannot be controlled, just monitored,
1122  * as expected.  It overrides all radio state in firmware
1123  *
1124  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1125  * (TODO: verify how WLSW interacts with the returned radio state).
1126  *
1127  * The only time there are shadow radio state changes, is when
1128  * masked-off hotkeys are used.
1129  */
1130
1131 /*
1132  * Internal driver API for radio state:
1133  *
1134  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1135  * bool: true means radio blocked (off)
1136  */
1137 enum tpacpi_rfkill_state {
1138         TPACPI_RFK_RADIO_OFF = 0,
1139         TPACPI_RFK_RADIO_ON
1140 };
1141
1142 /* rfkill switches */
1143 enum tpacpi_rfk_id {
1144         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1145         TPACPI_RFK_WWAN_SW_ID,
1146         TPACPI_RFK_UWB_SW_ID,
1147         TPACPI_RFK_SW_MAX
1148 };
1149
1150 static const char *tpacpi_rfkill_names[] = {
1151         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1152         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1153         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1154         [TPACPI_RFK_SW_MAX] = NULL
1155 };
1156
1157 /* ThinkPad-ACPI rfkill subdriver */
1158 struct tpacpi_rfk {
1159         struct rfkill *rfkill;
1160         enum tpacpi_rfk_id id;
1161         const struct tpacpi_rfk_ops *ops;
1162 };
1163
1164 struct tpacpi_rfk_ops {
1165         /* firmware interface */
1166         int (*get_status)(void);
1167         int (*set_status)(const enum tpacpi_rfkill_state);
1168 };
1169
1170 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1171
1172 /* Query FW and update rfkill sw state for a given rfkill switch */
1173 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1174 {
1175         int status;
1176
1177         if (!tp_rfk)
1178                 return -ENODEV;
1179
1180         status = (tp_rfk->ops->get_status)();
1181         if (status < 0)
1182                 return status;
1183
1184         rfkill_set_sw_state(tp_rfk->rfkill,
1185                             (status == TPACPI_RFK_RADIO_OFF));
1186
1187         return status;
1188 }
1189
1190 /* Query FW and update rfkill sw state for all rfkill switches */
1191 static void tpacpi_rfk_update_swstate_all(void)
1192 {
1193         unsigned int i;
1194
1195         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1196                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1197 }
1198
1199 /*
1200  * Sync the HW-blocking state of all rfkill switches,
1201  * do notice it causes the rfkill core to schedule uevents
1202  */
1203 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1204 {
1205         unsigned int i;
1206         struct tpacpi_rfk *tp_rfk;
1207
1208         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1209                 tp_rfk = tpacpi_rfkill_switches[i];
1210                 if (tp_rfk) {
1211                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1212                                                 blocked)) {
1213                                 /* ignore -- we track sw block */
1214                         }
1215                 }
1216         }
1217 }
1218
1219 /* Call to get the WLSW state from the firmware */
1220 static int hotkey_get_wlsw(void);
1221
1222 /* Call to query WLSW state and update all rfkill switches */
1223 static bool tpacpi_rfk_check_hwblock_state(void)
1224 {
1225         int res = hotkey_get_wlsw();
1226         int hw_blocked;
1227
1228         /* When unknown or unsupported, we have to assume it is unblocked */
1229         if (res < 0)
1230                 return false;
1231
1232         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1233         tpacpi_rfk_update_hwblock_state(hw_blocked);
1234
1235         return hw_blocked;
1236 }
1237
1238 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1239 {
1240         struct tpacpi_rfk *tp_rfk = data;
1241         int res;
1242
1243         dbg_printk(TPACPI_DBG_RFKILL,
1244                    "request to change radio state to %s\n",
1245                    blocked ? "blocked" : "unblocked");
1246
1247         /* try to set radio state */
1248         res = (tp_rfk->ops->set_status)(blocked ?
1249                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1250
1251         /* and update the rfkill core with whatever the FW really did */
1252         tpacpi_rfk_update_swstate(tp_rfk);
1253
1254         return (res < 0) ? res : 0;
1255 }
1256
1257 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1258         .set_block = tpacpi_rfk_hook_set_block,
1259 };
1260
1261 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1262                         const struct tpacpi_rfk_ops *tp_rfkops,
1263                         const enum rfkill_type rfktype,
1264                         const char *name,
1265                         const bool set_default)
1266 {
1267         struct tpacpi_rfk *atp_rfk;
1268         int res;
1269         bool sw_state = false;
1270         bool hw_state;
1271         int sw_status;
1272
1273         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1274
1275         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1276         if (atp_rfk)
1277                 atp_rfk->rfkill = rfkill_alloc(name,
1278                                                 &tpacpi_pdev->dev,
1279                                                 rfktype,
1280                                                 &tpacpi_rfk_rfkill_ops,
1281                                                 atp_rfk);
1282         if (!atp_rfk || !atp_rfk->rfkill) {
1283                 pr_err("failed to allocate memory for rfkill class\n");
1284                 kfree(atp_rfk);
1285                 return -ENOMEM;
1286         }
1287
1288         atp_rfk->id = id;
1289         atp_rfk->ops = tp_rfkops;
1290
1291         sw_status = (tp_rfkops->get_status)();
1292         if (sw_status < 0) {
1293                 pr_err("failed to read initial state for %s, error %d\n",
1294                        name, sw_status);
1295         } else {
1296                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1297                 if (set_default) {
1298                         /* try to keep the initial state, since we ask the
1299                          * firmware to preserve it across S5 in NVRAM */
1300                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1301                 }
1302         }
1303         hw_state = tpacpi_rfk_check_hwblock_state();
1304         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1305
1306         res = rfkill_register(atp_rfk->rfkill);
1307         if (res < 0) {
1308                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1309                 rfkill_destroy(atp_rfk->rfkill);
1310                 kfree(atp_rfk);
1311                 return res;
1312         }
1313
1314         tpacpi_rfkill_switches[id] = atp_rfk;
1315
1316         pr_info("rfkill switch %s: radio is %sblocked\n",
1317                 name, (sw_state || hw_state) ? "" : "un");
1318         return 0;
1319 }
1320
1321 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1322 {
1323         struct tpacpi_rfk *tp_rfk;
1324
1325         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1326
1327         tp_rfk = tpacpi_rfkill_switches[id];
1328         if (tp_rfk) {
1329                 rfkill_unregister(tp_rfk->rfkill);
1330                 rfkill_destroy(tp_rfk->rfkill);
1331                 tpacpi_rfkill_switches[id] = NULL;
1332                 kfree(tp_rfk);
1333         }
1334 }
1335
1336 static void printk_deprecated_rfkill_attribute(const char * const what)
1337 {
1338         printk_deprecated_attribute(what,
1339                         "Please switch to generic rfkill before year 2010");
1340 }
1341
1342 /* sysfs <radio> enable ------------------------------------------------ */
1343 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1344                                             struct device_attribute *attr,
1345                                             char *buf)
1346 {
1347         int status;
1348
1349         printk_deprecated_rfkill_attribute(attr->attr.name);
1350
1351         /* This is in the ABI... */
1352         if (tpacpi_rfk_check_hwblock_state()) {
1353                 status = TPACPI_RFK_RADIO_OFF;
1354         } else {
1355                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1356                 if (status < 0)
1357                         return status;
1358         }
1359
1360         return snprintf(buf, PAGE_SIZE, "%d\n",
1361                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1362 }
1363
1364 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1365                             struct device_attribute *attr,
1366                             const char *buf, size_t count)
1367 {
1368         unsigned long t;
1369         int res;
1370
1371         printk_deprecated_rfkill_attribute(attr->attr.name);
1372
1373         if (parse_strtoul(buf, 1, &t))
1374                 return -EINVAL;
1375
1376         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1377
1378         /* This is in the ABI... */
1379         if (tpacpi_rfk_check_hwblock_state() && !!t)
1380                 return -EPERM;
1381
1382         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1383                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1384         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1385
1386         return (res < 0) ? res : count;
1387 }
1388
1389 /* procfs -------------------------------------------------------------- */
1390 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1391 {
1392         if (id >= TPACPI_RFK_SW_MAX)
1393                 seq_printf(m, "status:\t\tnot supported\n");
1394         else {
1395                 int status;
1396
1397                 /* This is in the ABI... */
1398                 if (tpacpi_rfk_check_hwblock_state()) {
1399                         status = TPACPI_RFK_RADIO_OFF;
1400                 } else {
1401                         status = tpacpi_rfk_update_swstate(
1402                                                 tpacpi_rfkill_switches[id]);
1403                         if (status < 0)
1404                                 return status;
1405                 }
1406
1407                 seq_printf(m, "status:\t\t%s\n",
1408                                 (status == TPACPI_RFK_RADIO_ON) ?
1409                                         "enabled" : "disabled");
1410                 seq_printf(m, "commands:\tenable, disable\n");
1411         }
1412
1413         return 0;
1414 }
1415
1416 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1417 {
1418         char *cmd;
1419         int status = -1;
1420         int res = 0;
1421
1422         if (id >= TPACPI_RFK_SW_MAX)
1423                 return -ENODEV;
1424
1425         while ((cmd = next_cmd(&buf))) {
1426                 if (strlencmp(cmd, "enable") == 0)
1427                         status = TPACPI_RFK_RADIO_ON;
1428                 else if (strlencmp(cmd, "disable") == 0)
1429                         status = TPACPI_RFK_RADIO_OFF;
1430                 else
1431                         return -EINVAL;
1432         }
1433
1434         if (status != -1) {
1435                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1436                                 (status == TPACPI_RFK_RADIO_ON) ?
1437                                                 "enable" : "disable",
1438                                 tpacpi_rfkill_names[id]);
1439                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1440                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1441         }
1442
1443         return res;
1444 }
1445
1446 /*************************************************************************
1447  * thinkpad-acpi driver attributes
1448  */
1449
1450 /* interface_version --------------------------------------------------- */
1451 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1452 {
1453         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1454 }
1455 static DRIVER_ATTR_RO(interface_version);
1456
1457 /* debug_level --------------------------------------------------------- */
1458 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1459 {
1460         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1461 }
1462
1463 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1464                                  size_t count)
1465 {
1466         unsigned long t;
1467
1468         if (parse_strtoul(buf, 0xffff, &t))
1469                 return -EINVAL;
1470
1471         dbg_level = t;
1472
1473         return count;
1474 }
1475 static DRIVER_ATTR_RW(debug_level);
1476
1477 /* version ------------------------------------------------------------- */
1478 static ssize_t version_show(struct device_driver *drv, char *buf)
1479 {
1480         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1481                         TPACPI_DESC, TPACPI_VERSION);
1482 }
1483 static DRIVER_ATTR_RO(version);
1484
1485 /* --------------------------------------------------------------------- */
1486
1487 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1488
1489 /* wlsw_emulstate ------------------------------------------------------ */
1490 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1491 {
1492         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1493 }
1494
1495 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1496                                     size_t count)
1497 {
1498         unsigned long t;
1499
1500         if (parse_strtoul(buf, 1, &t))
1501                 return -EINVAL;
1502
1503         if (tpacpi_wlsw_emulstate != !!t) {
1504                 tpacpi_wlsw_emulstate = !!t;
1505                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1506         }
1507
1508         return count;
1509 }
1510 static DRIVER_ATTR_RW(wlsw_emulstate);
1511
1512 /* bluetooth_emulstate ------------------------------------------------- */
1513 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1514 {
1515         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1516 }
1517
1518 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1519                                          const char *buf, size_t count)
1520 {
1521         unsigned long t;
1522
1523         if (parse_strtoul(buf, 1, &t))
1524                 return -EINVAL;
1525
1526         tpacpi_bluetooth_emulstate = !!t;
1527
1528         return count;
1529 }
1530 static DRIVER_ATTR_RW(bluetooth_emulstate);
1531
1532 /* wwan_emulstate ------------------------------------------------- */
1533 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1534 {
1535         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1536 }
1537
1538 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1539                                     size_t count)
1540 {
1541         unsigned long t;
1542
1543         if (parse_strtoul(buf, 1, &t))
1544                 return -EINVAL;
1545
1546         tpacpi_wwan_emulstate = !!t;
1547
1548         return count;
1549 }
1550 static DRIVER_ATTR_RW(wwan_emulstate);
1551
1552 /* uwb_emulstate ------------------------------------------------- */
1553 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1554 {
1555         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1556 }
1557
1558 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1559                                    size_t count)
1560 {
1561         unsigned long t;
1562
1563         if (parse_strtoul(buf, 1, &t))
1564                 return -EINVAL;
1565
1566         tpacpi_uwb_emulstate = !!t;
1567
1568         return count;
1569 }
1570 static DRIVER_ATTR_RW(uwb_emulstate);
1571 #endif
1572
1573 /* --------------------------------------------------------------------- */
1574
1575 static struct driver_attribute *tpacpi_driver_attributes[] = {
1576         &driver_attr_debug_level, &driver_attr_version,
1577         &driver_attr_interface_version,
1578 };
1579
1580 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1581 {
1582         int i, res;
1583
1584         i = 0;
1585         res = 0;
1586         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1587                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1588                 i++;
1589         }
1590
1591 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1592         if (!res && dbg_wlswemul)
1593                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1594         if (!res && dbg_bluetoothemul)
1595                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1596         if (!res && dbg_wwanemul)
1597                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1598         if (!res && dbg_uwbemul)
1599                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1600 #endif
1601
1602         return res;
1603 }
1604
1605 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1606 {
1607         int i;
1608
1609         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1610                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1611
1612 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1613         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1614         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1615         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1616         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1617 #endif
1618 }
1619
1620 /*************************************************************************
1621  * Firmware Data
1622  */
1623
1624 /*
1625  * Table of recommended minimum BIOS versions
1626  *
1627  * Reasons for listing:
1628  *    1. Stable BIOS, listed because the unknown amount of
1629  *       bugs and bad ACPI behaviour on older versions
1630  *
1631  *    2. BIOS or EC fw with known bugs that trigger on Linux
1632  *
1633  *    3. BIOS with known reduced functionality in older versions
1634  *
1635  *  We recommend the latest BIOS and EC version.
1636  *  We only support the latest BIOS and EC fw version as a rule.
1637  *
1638  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1639  *  Information from users in ThinkWiki
1640  *
1641  *  WARNING: we use this table also to detect that the machine is
1642  *  a ThinkPad in some cases, so don't remove entries lightly.
1643  */
1644
1645 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1646         { .vendor       = (__v),                        \
1647           .bios         = TPID(__id1, __id2),           \
1648           .ec           = TPACPI_MATCH_ANY,             \
1649           .quirks       = TPACPI_MATCH_ANY_VERSION << 16 \
1650                           | TPVER(__bv1, __bv2) }
1651
1652 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1653                 __eid, __ev1, __ev2)                    \
1654         { .vendor       = (__v),                        \
1655           .bios         = TPID(__bid1, __bid2),         \
1656           .ec           = __eid,                        \
1657           .quirks       = TPVER(__ev1, __ev2) << 16     \
1658                           | TPVER(__bv1, __bv2) }
1659
1660 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1661         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1662
1663 /* Outdated IBM BIOSes often lack the EC id string */
1664 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1665         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1666                 __bv1, __bv2, TPID(__id1, __id2),       \
1667                 __ev1, __ev2),                          \
1668         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1669                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1670                 __ev1, __ev2)
1671
1672 /* Outdated IBM BIOSes often lack the EC id string */
1673 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1674                 __eid1, __eid2, __ev1, __ev2)           \
1675         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1676                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1677                 __ev1, __ev2),                          \
1678         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1679                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1680                 __ev1, __ev2)
1681
1682 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1683         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1684
1685 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1686         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1687                 __bv1, __bv2, TPID(__id1, __id2),       \
1688                 __ev1, __ev2)
1689
1690 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1691                 __eid1, __eid2, __ev1, __ev2)           \
1692         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1693                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1694                 __ev1, __ev2)
1695
1696 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1697         /*  Numeric models ------------------ */
1698         /*      FW MODEL   BIOS VERS          */
1699         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1700         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1701         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1702         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1703         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1704         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1705         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1706         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1707         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1708
1709         /* A-series ------------------------- */
1710         /*      FW MODEL   BIOS VERS  EC VERS */
1711         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1712         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1713         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1714         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1715         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1716         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1717         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1718         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1719         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1720         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1721         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1722
1723         /* G-series ------------------------- */
1724         /*      FW MODEL   BIOS VERS          */
1725         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1726         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1727
1728         /* R-series, T-series --------------- */
1729         /*      FW MODEL   BIOS VERS  EC VERS */
1730         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1731         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1732         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1733         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1734         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1735         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1736         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1737                                                     T40/p, T41/p, T42/p (1) */
1738         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1739         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1740         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1741         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1742
1743         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1744         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1745         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1746         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1747         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1748         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1749
1750         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1751         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1752         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1753
1754         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1755         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1756         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1757
1758         /* X-series ------------------------- */
1759         /*      FW MODEL   BIOS VERS  EC VERS */
1760         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1761         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1762         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1763         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1764         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1765         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1766         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1767
1768         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1769         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1770
1771         /* (0) - older versions lack DMI EC fw string and functionality */
1772         /* (1) - older versions known to lack functionality */
1773 };
1774
1775 #undef TPV_QL1
1776 #undef TPV_QL0
1777 #undef TPV_QI2
1778 #undef TPV_QI1
1779 #undef TPV_QI0
1780 #undef TPV_Q_X
1781 #undef TPV_Q
1782
1783 static void __init tpacpi_check_outdated_fw(void)
1784 {
1785         unsigned long fwvers;
1786         u16 ec_version, bios_version;
1787
1788         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1789                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1790
1791         if (!fwvers)
1792                 return;
1793
1794         bios_version = fwvers & 0xffffU;
1795         ec_version = (fwvers >> 16) & 0xffffU;
1796
1797         /* note that unknown versions are set to 0x0000 and we use that */
1798         if ((bios_version > thinkpad_id.bios_release) ||
1799             (ec_version > thinkpad_id.ec_release &&
1800                                 ec_version != TPACPI_MATCH_ANY_VERSION)) {
1801                 /*
1802                  * The changelogs would let us track down the exact
1803                  * reason, but it is just too much of a pain to track
1804                  * it.  We only list BIOSes that are either really
1805                  * broken, or really stable to begin with, so it is
1806                  * best if the user upgrades the firmware anyway.
1807                  */
1808                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1809                 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1810         }
1811 }
1812
1813 static bool __init tpacpi_is_fw_known(void)
1814 {
1815         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1816                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1817 }
1818
1819 /****************************************************************************
1820  ****************************************************************************
1821  *
1822  * Subdrivers
1823  *
1824  ****************************************************************************
1825  ****************************************************************************/
1826
1827 /*************************************************************************
1828  * thinkpad-acpi metadata subdriver
1829  */
1830
1831 static int thinkpad_acpi_driver_read(struct seq_file *m)
1832 {
1833         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1834         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1835         return 0;
1836 }
1837
1838 static struct ibm_struct thinkpad_acpi_driver_data = {
1839         .name = "driver",
1840         .read = thinkpad_acpi_driver_read,
1841 };
1842
1843 /*************************************************************************
1844  * Hotkey subdriver
1845  */
1846
1847 /*
1848  * ThinkPad firmware event model
1849  *
1850  * The ThinkPad firmware has two main event interfaces: normal ACPI
1851  * notifications (which follow the ACPI standard), and a private event
1852  * interface.
1853  *
1854  * The private event interface also issues events for the hotkeys.  As
1855  * the driver gained features, the event handling code ended up being
1856  * built around the hotkey subdriver.  This will need to be refactored
1857  * to a more formal event API eventually.
1858  *
1859  * Some "hotkeys" are actually supposed to be used as event reports,
1860  * such as "brightness has changed", "volume has changed", depending on
1861  * the ThinkPad model and how the firmware is operating.
1862  *
1863  * Unlike other classes, hotkey-class events have mask/unmask control on
1864  * non-ancient firmware.  However, how it behaves changes a lot with the
1865  * firmware model and version.
1866  */
1867
1868 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1869         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1870         TP_ACPI_HOTKEYSCAN_FNF2,
1871         TP_ACPI_HOTKEYSCAN_FNF3,
1872         TP_ACPI_HOTKEYSCAN_FNF4,
1873         TP_ACPI_HOTKEYSCAN_FNF5,
1874         TP_ACPI_HOTKEYSCAN_FNF6,
1875         TP_ACPI_HOTKEYSCAN_FNF7,
1876         TP_ACPI_HOTKEYSCAN_FNF8,
1877         TP_ACPI_HOTKEYSCAN_FNF9,
1878         TP_ACPI_HOTKEYSCAN_FNF10,
1879         TP_ACPI_HOTKEYSCAN_FNF11,
1880         TP_ACPI_HOTKEYSCAN_FNF12,
1881         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1882         TP_ACPI_HOTKEYSCAN_FNINSERT,
1883         TP_ACPI_HOTKEYSCAN_FNDELETE,
1884         TP_ACPI_HOTKEYSCAN_FNHOME,
1885         TP_ACPI_HOTKEYSCAN_FNEND,
1886         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1887         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1888         TP_ACPI_HOTKEYSCAN_FNSPACE,
1889         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1890         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1891         TP_ACPI_HOTKEYSCAN_MUTE,
1892         TP_ACPI_HOTKEYSCAN_THINKPAD,
1893         TP_ACPI_HOTKEYSCAN_UNK1,
1894         TP_ACPI_HOTKEYSCAN_UNK2,
1895         TP_ACPI_HOTKEYSCAN_UNK3,
1896         TP_ACPI_HOTKEYSCAN_UNK4,
1897         TP_ACPI_HOTKEYSCAN_UNK5,
1898         TP_ACPI_HOTKEYSCAN_UNK6,
1899         TP_ACPI_HOTKEYSCAN_UNK7,
1900         TP_ACPI_HOTKEYSCAN_UNK8,
1901
1902         /* Adaptive keyboard keycodes */
1903         TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1904         TP_ACPI_HOTKEYSCAN_MUTE2        = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1905         TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1906         TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1907         TP_ACPI_HOTKEYSCAN_CLOUD,
1908         TP_ACPI_HOTKEYSCAN_UNK9,
1909         TP_ACPI_HOTKEYSCAN_VOICE,
1910         TP_ACPI_HOTKEYSCAN_UNK10,
1911         TP_ACPI_HOTKEYSCAN_GESTURES,
1912         TP_ACPI_HOTKEYSCAN_UNK11,
1913         TP_ACPI_HOTKEYSCAN_UNK12,
1914         TP_ACPI_HOTKEYSCAN_UNK13,
1915         TP_ACPI_HOTKEYSCAN_CONFIG,
1916         TP_ACPI_HOTKEYSCAN_NEW_TAB,
1917         TP_ACPI_HOTKEYSCAN_RELOAD,
1918         TP_ACPI_HOTKEYSCAN_BACK,
1919         TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1920         TP_ACPI_HOTKEYSCAN_MIC_UP,
1921         TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1922         TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1923         TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1924
1925         /* Lenovo extended keymap, starting at 0x1300 */
1926         TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1927         /* first new observed key (star, favorites) is 0x1311 */
1928         TP_ACPI_HOTKEYSCAN_STAR = 69,
1929         TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1930         TP_ACPI_HOTKEYSCAN_CALCULATOR,
1931         TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1932         TP_ACPI_HOTKEYSCAN_KEYBOARD,
1933
1934         /* Hotkey keymap size */
1935         TPACPI_HOTKEY_MAP_LEN
1936 };
1937
1938 enum {  /* Keys/events available through NVRAM polling */
1939         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1940         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1941 };
1942
1943 enum {  /* Positions of some of the keys in hotkey masks */
1944         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1945         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1946         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1947         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1948         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1949         TP_ACPI_HKEY_KBD_LIGHT_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1950         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1951         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1952         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1953         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1954         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1955 };
1956
1957 enum {  /* NVRAM to ACPI HKEY group map */
1958         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1959                                           TP_ACPI_HKEY_ZOOM_MASK |
1960                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1961                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1962         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1963                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1964         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1965                                           TP_ACPI_HKEY_VOLDWN_MASK |
1966                                           TP_ACPI_HKEY_MUTE_MASK,
1967 };
1968
1969 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1970 struct tp_nvram_state {
1971        u16 thinkpad_toggle:1;
1972        u16 zoom_toggle:1;
1973        u16 display_toggle:1;
1974        u16 thinklight_toggle:1;
1975        u16 hibernate_toggle:1;
1976        u16 displayexp_toggle:1;
1977        u16 display_state:1;
1978        u16 brightness_toggle:1;
1979        u16 volume_toggle:1;
1980        u16 mute:1;
1981
1982        u8 brightness_level;
1983        u8 volume_level;
1984 };
1985
1986 /* kthread for the hotkey poller */
1987 static struct task_struct *tpacpi_hotkey_task;
1988
1989 /*
1990  * Acquire mutex to write poller control variables as an
1991  * atomic block.
1992  *
1993  * Increment hotkey_config_change when changing them if you
1994  * want the kthread to forget old state.
1995  *
1996  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1997  */
1998 static struct mutex hotkey_thread_data_mutex;
1999 static unsigned int hotkey_config_change;
2000
2001 /*
2002  * hotkey poller control variables
2003  *
2004  * Must be atomic or readers will also need to acquire mutex
2005  *
2006  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2007  * should be used only when the changes need to be taken as
2008  * a block, OR when one needs to force the kthread to forget
2009  * old state.
2010  */
2011 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2012 static unsigned int hotkey_poll_freq = 10; /* Hz */
2013
2014 #define HOTKEY_CONFIG_CRITICAL_START \
2015         do { \
2016                 mutex_lock(&hotkey_thread_data_mutex); \
2017                 hotkey_config_change++; \
2018         } while (0);
2019 #define HOTKEY_CONFIG_CRITICAL_END \
2020         mutex_unlock(&hotkey_thread_data_mutex);
2021
2022 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2023
2024 #define hotkey_source_mask 0U
2025 #define HOTKEY_CONFIG_CRITICAL_START
2026 #define HOTKEY_CONFIG_CRITICAL_END
2027
2028 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2029
2030 static struct mutex hotkey_mutex;
2031
2032 static enum {   /* Reasons for waking up */
2033         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2034         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2035         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2036 } hotkey_wakeup_reason;
2037
2038 static int hotkey_autosleep_ack;
2039
2040 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2041 static u32 hotkey_all_mask;             /* all events supported in fw */
2042 static u32 hotkey_adaptive_all_mask;    /* all adaptive events supported in fw */
2043 static u32 hotkey_reserved_mask;        /* events better left disabled */
2044 static u32 hotkey_driver_mask;          /* events needed by the driver */
2045 static u32 hotkey_user_mask;            /* events visible to userspace */
2046 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2047
2048 static u16 *hotkey_keycode_map;
2049
2050 static struct attribute_set *hotkey_dev_attributes;
2051
2052 static void tpacpi_driver_event(const unsigned int hkey_event);
2053 static void hotkey_driver_event(const unsigned int scancode);
2054 static void hotkey_poll_setup(const bool may_warn);
2055
2056 /* HKEY.MHKG() return bits */
2057 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2058 enum {
2059         TP_ACPI_MULTI_MODE_INVALID      = 0,
2060         TP_ACPI_MULTI_MODE_UNKNOWN      = 1 << 0,
2061         TP_ACPI_MULTI_MODE_LAPTOP       = 1 << 1,
2062         TP_ACPI_MULTI_MODE_TABLET       = 1 << 2,
2063         TP_ACPI_MULTI_MODE_FLAT         = 1 << 3,
2064         TP_ACPI_MULTI_MODE_STAND        = 1 << 4,
2065         TP_ACPI_MULTI_MODE_TENT         = 1 << 5,
2066         TP_ACPI_MULTI_MODE_STAND_TENT   = 1 << 6,
2067 };
2068
2069 enum {
2070         /* The following modes are considered tablet mode for the purpose of
2071          * reporting the status to userspace. i.e. in all these modes it makes
2072          * sense to disable the laptop input devices such as touchpad and
2073          * keyboard.
2074          */
2075         TP_ACPI_MULTI_MODE_TABLET_LIKE  = TP_ACPI_MULTI_MODE_TABLET |
2076                                           TP_ACPI_MULTI_MODE_STAND |
2077                                           TP_ACPI_MULTI_MODE_TENT |
2078                                           TP_ACPI_MULTI_MODE_STAND_TENT,
2079 };
2080
2081 static int hotkey_get_wlsw(void)
2082 {
2083         int status;
2084
2085         if (!tp_features.hotkey_wlsw)
2086                 return -ENODEV;
2087
2088 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2089         if (dbg_wlswemul)
2090                 return (tpacpi_wlsw_emulstate) ?
2091                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2092 #endif
2093
2094         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2095                 return -EIO;
2096
2097         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2098 }
2099
2100 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
2101 {
2102         int type = (s >> 16) & 0xffff;
2103         int value = s & 0xffff;
2104         int mode = TP_ACPI_MULTI_MODE_INVALID;
2105         int valid_modes = 0;
2106
2107         if (has_tablet_mode)
2108                 *has_tablet_mode = 0;
2109
2110         switch (type) {
2111         case 1:
2112                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2113                               TP_ACPI_MULTI_MODE_TABLET |
2114                               TP_ACPI_MULTI_MODE_STAND_TENT;
2115                 break;
2116         case 2:
2117                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2118                               TP_ACPI_MULTI_MODE_FLAT |
2119                               TP_ACPI_MULTI_MODE_TABLET |
2120                               TP_ACPI_MULTI_MODE_STAND |
2121                               TP_ACPI_MULTI_MODE_TENT;
2122                 break;
2123         case 3:
2124                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2125                               TP_ACPI_MULTI_MODE_FLAT;
2126                 break;
2127         case 4:
2128         case 5:
2129                 /* In mode 4, FLAT is not specified as a valid mode. However,
2130                  * it can be seen at least on the X1 Yoga 2nd Generation.
2131                  */
2132                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2133                               TP_ACPI_MULTI_MODE_FLAT |
2134                               TP_ACPI_MULTI_MODE_TABLET |
2135                               TP_ACPI_MULTI_MODE_STAND |
2136                               TP_ACPI_MULTI_MODE_TENT;
2137                 break;
2138         default:
2139                 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2140                        type, value, TPACPI_MAIL);
2141                 return 0;
2142         }
2143
2144         if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2145                 *has_tablet_mode = 1;
2146
2147         switch (value) {
2148         case 1:
2149                 mode = TP_ACPI_MULTI_MODE_LAPTOP;
2150                 break;
2151         case 2:
2152                 mode = TP_ACPI_MULTI_MODE_FLAT;
2153                 break;
2154         case 3:
2155                 mode = TP_ACPI_MULTI_MODE_TABLET;
2156                 break;
2157         case 4:
2158                 if (type == 1)
2159                         mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2160                 else
2161                         mode = TP_ACPI_MULTI_MODE_STAND;
2162                 break;
2163         case 5:
2164                 mode = TP_ACPI_MULTI_MODE_TENT;
2165                 break;
2166         default:
2167                 if (type == 5 && value == 0xffff) {
2168                         pr_warn("Multi mode status is undetected, assuming laptop\n");
2169                         return 0;
2170                 }
2171         }
2172
2173         if (!(mode & valid_modes)) {
2174                 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2175                        value, type, TPACPI_MAIL);
2176                 return 0;
2177         }
2178
2179         return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2180 }
2181
2182 static int hotkey_get_tablet_mode(int *status)
2183 {
2184         int s;
2185
2186         switch (tp_features.hotkey_tablet) {
2187         case TP_HOTKEY_TABLET_USES_MHKG:
2188                 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2189                         return -EIO;
2190
2191                 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2192                 break;
2193         case TP_HOTKEY_TABLET_USES_GMMS:
2194                 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2195                         return -EIO;
2196
2197                 *status = hotkey_gmms_get_tablet_mode(s, NULL);
2198                 break;
2199         default:
2200                 break;
2201         }
2202
2203         return 0;
2204 }
2205
2206 /*
2207  * Reads current event mask from firmware, and updates
2208  * hotkey_acpi_mask accordingly.  Also resets any bits
2209  * from hotkey_user_mask that are unavailable to be
2210  * delivered (shadow requirement of the userspace ABI).
2211  *
2212  * Call with hotkey_mutex held
2213  */
2214 static int hotkey_mask_get(void)
2215 {
2216         if (tp_features.hotkey_mask) {
2217                 u32 m = 0;
2218
2219                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2220                         return -EIO;
2221
2222                 hotkey_acpi_mask = m;
2223         } else {
2224                 /* no mask support doesn't mean no event support... */
2225                 hotkey_acpi_mask = hotkey_all_mask;
2226         }
2227
2228         /* sync userspace-visible mask */
2229         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2230
2231         return 0;
2232 }
2233
2234 static void hotkey_mask_warn_incomplete_mask(void)
2235 {
2236         /* log only what the user can fix... */
2237         const u32 wantedmask = hotkey_driver_mask &
2238                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2239                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2240
2241         if (wantedmask)
2242                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2243 }
2244
2245 /*
2246  * Set the firmware mask when supported
2247  *
2248  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2249  *
2250  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2251  *
2252  * Call with hotkey_mutex held
2253  */
2254 static int hotkey_mask_set(u32 mask)
2255 {
2256         int i;
2257         int rc = 0;
2258
2259         const u32 fwmask = mask & ~hotkey_source_mask;
2260
2261         if (tp_features.hotkey_mask) {
2262                 for (i = 0; i < 32; i++) {
2263                         if (!acpi_evalf(hkey_handle,
2264                                         NULL, "MHKM", "vdd", i + 1,
2265                                         !!(mask & (1 << i)))) {
2266                                 rc = -EIO;
2267                                 break;
2268                         }
2269                 }
2270         }
2271
2272         /*
2273          * We *must* make an inconditional call to hotkey_mask_get to
2274          * refresh hotkey_acpi_mask and update hotkey_user_mask
2275          *
2276          * Take the opportunity to also log when we cannot _enable_
2277          * a given event.
2278          */
2279         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2280                 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2281                           fwmask, hotkey_acpi_mask);
2282         }
2283
2284         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2285                 hotkey_mask_warn_incomplete_mask();
2286
2287         return rc;
2288 }
2289
2290 /*
2291  * Sets hotkey_user_mask and tries to set the firmware mask
2292  *
2293  * Call with hotkey_mutex held
2294  */
2295 static int hotkey_user_mask_set(const u32 mask)
2296 {
2297         int rc;
2298
2299         /* Give people a chance to notice they are doing something that
2300          * is bound to go boom on their users sooner or later */
2301         if (!tp_warned.hotkey_mask_ff &&
2302             (mask == 0xffff || mask == 0xffffff ||
2303              mask == 0xffffffff)) {
2304                 tp_warned.hotkey_mask_ff = 1;
2305                 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2306                           mask);
2307                 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2308         }
2309
2310         /* Try to enable what the user asked for, plus whatever we need.
2311          * this syncs everything but won't enable bits in hotkey_user_mask */
2312         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2313
2314         /* Enable the available bits in hotkey_user_mask */
2315         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2316
2317         return rc;
2318 }
2319
2320 /*
2321  * Sets the driver hotkey mask.
2322  *
2323  * Can be called even if the hotkey subdriver is inactive
2324  */
2325 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2326 {
2327         int rc;
2328
2329         /* Do the right thing if hotkey_init has not been called yet */
2330         if (!tp_features.hotkey) {
2331                 hotkey_driver_mask = mask;
2332                 return 0;
2333         }
2334
2335         mutex_lock(&hotkey_mutex);
2336
2337         HOTKEY_CONFIG_CRITICAL_START
2338         hotkey_driver_mask = mask;
2339 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2340         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2341 #endif
2342         HOTKEY_CONFIG_CRITICAL_END
2343
2344         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2345                                                         ~hotkey_source_mask);
2346         hotkey_poll_setup(true);
2347
2348         mutex_unlock(&hotkey_mutex);
2349
2350         return rc;
2351 }
2352
2353 static int hotkey_status_get(int *status)
2354 {
2355         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2356                 return -EIO;
2357
2358         return 0;
2359 }
2360
2361 static int hotkey_status_set(bool enable)
2362 {
2363         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2364                 return -EIO;
2365
2366         return 0;
2367 }
2368
2369 static void tpacpi_input_send_tabletsw(void)
2370 {
2371         int state;
2372
2373         if (tp_features.hotkey_tablet &&
2374             !hotkey_get_tablet_mode(&state)) {
2375                 mutex_lock(&tpacpi_inputdev_send_mutex);
2376
2377                 input_report_switch(tpacpi_inputdev,
2378                                     SW_TABLET_MODE, !!state);
2379                 input_sync(tpacpi_inputdev);
2380
2381                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2382         }
2383 }
2384
2385 /* Do NOT call without validating scancode first */
2386 static void tpacpi_input_send_key(const unsigned int scancode)
2387 {
2388         const unsigned int keycode = hotkey_keycode_map[scancode];
2389
2390         if (keycode != KEY_RESERVED) {
2391                 mutex_lock(&tpacpi_inputdev_send_mutex);
2392
2393                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2394                 input_report_key(tpacpi_inputdev, keycode, 1);
2395                 input_sync(tpacpi_inputdev);
2396
2397                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2398                 input_report_key(tpacpi_inputdev, keycode, 0);
2399                 input_sync(tpacpi_inputdev);
2400
2401                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2402         }
2403 }
2404
2405 /* Do NOT call without validating scancode first */
2406 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2407 {
2408         hotkey_driver_event(scancode);
2409         if (hotkey_user_mask & (1 << scancode))
2410                 tpacpi_input_send_key(scancode);
2411 }
2412
2413 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2414 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2415
2416 /* Do NOT call without validating scancode first */
2417 static void tpacpi_hotkey_send_key(unsigned int scancode)
2418 {
2419         tpacpi_input_send_key_masked(scancode);
2420 }
2421
2422 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2423 {
2424         u8 d;
2425
2426         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2427                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2428                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2429                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2430                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2431                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2432         }
2433         if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2434                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2435                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2436         }
2437         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2438                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2439                 n->displayexp_toggle =
2440                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2441         }
2442         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2443                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2444                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2445                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2446                 n->brightness_toggle =
2447                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2448         }
2449         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2450                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2451                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2452                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2453                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2454                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2455         }
2456 }
2457
2458 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2459 do { \
2460         if ((event_mask & (1 << __scancode)) && \
2461             oldn->__member != newn->__member) \
2462                 tpacpi_hotkey_send_key(__scancode); \
2463 } while (0)
2464
2465 #define TPACPI_MAY_SEND_KEY(__scancode) \
2466 do { \
2467         if (event_mask & (1 << __scancode)) \
2468                 tpacpi_hotkey_send_key(__scancode); \
2469 } while (0)
2470
2471 static void issue_volchange(const unsigned int oldvol,
2472                             const unsigned int newvol,
2473                             const u32 event_mask)
2474 {
2475         unsigned int i = oldvol;
2476
2477         while (i > newvol) {
2478                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2479                 i--;
2480         }
2481         while (i < newvol) {
2482                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2483                 i++;
2484         }
2485 }
2486
2487 static void issue_brightnesschange(const unsigned int oldbrt,
2488                                    const unsigned int newbrt,
2489                                    const u32 event_mask)
2490 {
2491         unsigned int i = oldbrt;
2492
2493         while (i > newbrt) {
2494                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2495                 i--;
2496         }
2497         while (i < newbrt) {
2498                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2499                 i++;
2500         }
2501 }
2502
2503 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2504                                            struct tp_nvram_state *newn,
2505                                            const u32 event_mask)
2506 {
2507
2508         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2509         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2510         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2511         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2512
2513         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2514
2515         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2516
2517         /*
2518          * Handle volume
2519          *
2520          * This code is supposed to duplicate the IBM firmware behaviour:
2521          * - Pressing MUTE issues mute hotkey message, even when already mute
2522          * - Pressing Volume up/down issues volume up/down hotkey messages,
2523          *   even when already at maximum or minimum volume
2524          * - The act of unmuting issues volume up/down notification,
2525          *   depending which key was used to unmute
2526          *
2527          * We are constrained to what the NVRAM can tell us, which is not much
2528          * and certainly not enough if more than one volume hotkey was pressed
2529          * since the last poll cycle.
2530          *
2531          * Just to make our life interesting, some newer Lenovo ThinkPads have
2532          * bugs in the BIOS and may fail to update volume_toggle properly.
2533          */
2534         if (newn->mute) {
2535                 /* muted */
2536                 if (!oldn->mute ||
2537                     oldn->volume_toggle != newn->volume_toggle ||
2538                     oldn->volume_level != newn->volume_level) {
2539                         /* recently muted, or repeated mute keypress, or
2540                          * multiple presses ending in mute */
2541                         issue_volchange(oldn->volume_level, newn->volume_level,
2542                                 event_mask);
2543                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2544                 }
2545         } else {
2546                 /* unmute */
2547                 if (oldn->mute) {
2548                         /* recently unmuted, issue 'unmute' keypress */
2549                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2550                 }
2551                 if (oldn->volume_level != newn->volume_level) {
2552                         issue_volchange(oldn->volume_level, newn->volume_level,
2553                                 event_mask);
2554                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2555                         /* repeated vol up/down keypress at end of scale ? */
2556                         if (newn->volume_level == 0)
2557                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2558                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2559                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2560                 }
2561         }
2562
2563         /* handle brightness */
2564         if (oldn->brightness_level != newn->brightness_level) {
2565                 issue_brightnesschange(oldn->brightness_level,
2566                                        newn->brightness_level, event_mask);
2567         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2568                 /* repeated key presses that didn't change state */
2569                 if (newn->brightness_level == 0)
2570                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2571                 else if (newn->brightness_level >= bright_maxlvl
2572                                 && !tp_features.bright_unkfw)
2573                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2574         }
2575
2576 #undef TPACPI_COMPARE_KEY
2577 #undef TPACPI_MAY_SEND_KEY
2578 }
2579
2580 /*
2581  * Polling driver
2582  *
2583  * We track all events in hotkey_source_mask all the time, since
2584  * most of them are edge-based.  We only issue those requested by
2585  * hotkey_user_mask or hotkey_driver_mask, though.
2586  */
2587 static int hotkey_kthread(void *data)
2588 {
2589         struct tp_nvram_state s[2];
2590         u32 poll_mask, event_mask;
2591         unsigned int si, so;
2592         unsigned long t;
2593         unsigned int change_detector;
2594         unsigned int poll_freq;
2595         bool was_frozen;
2596
2597         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2598                 goto exit;
2599
2600         set_freezable();
2601
2602         so = 0;
2603         si = 1;
2604         t = 0;
2605
2606         /* Initial state for compares */
2607         mutex_lock(&hotkey_thread_data_mutex);
2608         change_detector = hotkey_config_change;
2609         poll_mask = hotkey_source_mask;
2610         event_mask = hotkey_source_mask &
2611                         (hotkey_driver_mask | hotkey_user_mask);
2612         poll_freq = hotkey_poll_freq;
2613         mutex_unlock(&hotkey_thread_data_mutex);
2614         hotkey_read_nvram(&s[so], poll_mask);
2615
2616         while (!kthread_should_stop()) {
2617                 if (t == 0) {
2618                         if (likely(poll_freq))
2619                                 t = 1000/poll_freq;
2620                         else
2621                                 t = 100;        /* should never happen... */
2622                 }
2623                 t = msleep_interruptible(t);
2624                 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2625                         break;
2626
2627                 if (t > 0 && !was_frozen)
2628                         continue;
2629
2630                 mutex_lock(&hotkey_thread_data_mutex);
2631                 if (was_frozen || hotkey_config_change != change_detector) {
2632                         /* forget old state on thaw or config change */
2633                         si = so;
2634                         t = 0;
2635                         change_detector = hotkey_config_change;
2636                 }
2637                 poll_mask = hotkey_source_mask;
2638                 event_mask = hotkey_source_mask &
2639                                 (hotkey_driver_mask | hotkey_user_mask);
2640                 poll_freq = hotkey_poll_freq;
2641                 mutex_unlock(&hotkey_thread_data_mutex);
2642
2643                 if (likely(poll_mask)) {
2644                         hotkey_read_nvram(&s[si], poll_mask);
2645                         if (likely(si != so)) {
2646                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2647                                                                 event_mask);
2648                         }
2649                 }
2650
2651                 so = si;
2652                 si ^= 1;
2653         }
2654
2655 exit:
2656         return 0;
2657 }
2658
2659 /* call with hotkey_mutex held */
2660 static void hotkey_poll_stop_sync(void)
2661 {
2662         if (tpacpi_hotkey_task) {
2663                 kthread_stop(tpacpi_hotkey_task);
2664                 tpacpi_hotkey_task = NULL;
2665         }
2666 }
2667
2668 /* call with hotkey_mutex held */
2669 static void hotkey_poll_setup(const bool may_warn)
2670 {
2671         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2672         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2673
2674         if (hotkey_poll_freq > 0 &&
2675             (poll_driver_mask ||
2676              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2677                 if (!tpacpi_hotkey_task) {
2678                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2679                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2680                         if (IS_ERR(tpacpi_hotkey_task)) {
2681                                 tpacpi_hotkey_task = NULL;
2682                                 pr_err("could not create kernel thread for hotkey polling\n");
2683                         }
2684                 }
2685         } else {
2686                 hotkey_poll_stop_sync();
2687                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2688                     hotkey_poll_freq == 0) {
2689                         pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2690                                   poll_user_mask, poll_driver_mask);
2691                 }
2692         }
2693 }
2694
2695 static void hotkey_poll_setup_safe(const bool may_warn)
2696 {
2697         mutex_lock(&hotkey_mutex);
2698         hotkey_poll_setup(may_warn);
2699         mutex_unlock(&hotkey_mutex);
2700 }
2701
2702 /* call with hotkey_mutex held */
2703 static void hotkey_poll_set_freq(unsigned int freq)
2704 {
2705         if (!freq)
2706                 hotkey_poll_stop_sync();
2707
2708         hotkey_poll_freq = freq;
2709 }
2710
2711 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2712
2713 static void hotkey_poll_setup(const bool __unused)
2714 {
2715 }
2716
2717 static void hotkey_poll_setup_safe(const bool __unused)
2718 {
2719 }
2720
2721 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2722
2723 static int hotkey_inputdev_open(struct input_dev *dev)
2724 {
2725         switch (tpacpi_lifecycle) {
2726         case TPACPI_LIFE_INIT:
2727         case TPACPI_LIFE_RUNNING:
2728                 hotkey_poll_setup_safe(false);
2729                 return 0;
2730         case TPACPI_LIFE_EXITING:
2731                 return -EBUSY;
2732         }
2733
2734         /* Should only happen if tpacpi_lifecycle is corrupt */
2735         BUG();
2736         return -EBUSY;
2737 }
2738
2739 static void hotkey_inputdev_close(struct input_dev *dev)
2740 {
2741         /* disable hotkey polling when possible */
2742         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2743             !(hotkey_source_mask & hotkey_driver_mask))
2744                 hotkey_poll_setup_safe(false);
2745 }
2746
2747 /* sysfs hotkey enable ------------------------------------------------- */
2748 static ssize_t hotkey_enable_show(struct device *dev,
2749                            struct device_attribute *attr,
2750                            char *buf)
2751 {
2752         int res, status;
2753
2754         printk_deprecated_attribute("hotkey_enable",
2755                         "Hotkey reporting is always enabled");
2756
2757         res = hotkey_status_get(&status);
2758         if (res)
2759                 return res;
2760
2761         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2762 }
2763
2764 static ssize_t hotkey_enable_store(struct device *dev,
2765                             struct device_attribute *attr,
2766                             const char *buf, size_t count)
2767 {
2768         unsigned long t;
2769
2770         printk_deprecated_attribute("hotkey_enable",
2771                         "Hotkeys can be disabled through hotkey_mask");
2772
2773         if (parse_strtoul(buf, 1, &t))
2774                 return -EINVAL;
2775
2776         if (t == 0)
2777                 return -EPERM;
2778
2779         return count;
2780 }
2781
2782 static DEVICE_ATTR_RW(hotkey_enable);
2783
2784 /* sysfs hotkey mask --------------------------------------------------- */
2785 static ssize_t hotkey_mask_show(struct device *dev,
2786                            struct device_attribute *attr,
2787                            char *buf)
2788 {
2789         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2790 }
2791
2792 static ssize_t hotkey_mask_store(struct device *dev,
2793                             struct device_attribute *attr,
2794                             const char *buf, size_t count)
2795 {
2796         unsigned long t;
2797         int res;
2798
2799         if (parse_strtoul(buf, 0xffffffffUL, &t))
2800                 return -EINVAL;
2801
2802         if (mutex_lock_killable(&hotkey_mutex))
2803                 return -ERESTARTSYS;
2804
2805         res = hotkey_user_mask_set(t);
2806
2807 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2808         hotkey_poll_setup(true);
2809 #endif
2810
2811         mutex_unlock(&hotkey_mutex);
2812
2813         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2814
2815         return (res) ? res : count;
2816 }
2817
2818 static DEVICE_ATTR_RW(hotkey_mask);
2819
2820 /* sysfs hotkey bios_enabled ------------------------------------------- */
2821 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2822                            struct device_attribute *attr,
2823                            char *buf)
2824 {
2825         return sprintf(buf, "0\n");
2826 }
2827
2828 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2829
2830 /* sysfs hotkey bios_mask ---------------------------------------------- */
2831 static ssize_t hotkey_bios_mask_show(struct device *dev,
2832                            struct device_attribute *attr,
2833                            char *buf)
2834 {
2835         printk_deprecated_attribute("hotkey_bios_mask",
2836                         "This attribute is useless.");
2837         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2838 }
2839
2840 static DEVICE_ATTR_RO(hotkey_bios_mask);
2841
2842 /* sysfs hotkey all_mask ----------------------------------------------- */
2843 static ssize_t hotkey_all_mask_show(struct device *dev,
2844                            struct device_attribute *attr,
2845                            char *buf)
2846 {
2847         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2848                                 hotkey_all_mask | hotkey_source_mask);
2849 }
2850
2851 static DEVICE_ATTR_RO(hotkey_all_mask);
2852
2853 /* sysfs hotkey all_mask ----------------------------------------------- */
2854 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2855                            struct device_attribute *attr,
2856                            char *buf)
2857 {
2858         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2859                         hotkey_adaptive_all_mask | hotkey_source_mask);
2860 }
2861
2862 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2863
2864 /* sysfs hotkey recommended_mask --------------------------------------- */
2865 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2866                                             struct device_attribute *attr,
2867                                             char *buf)
2868 {
2869         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2870                         (hotkey_all_mask | hotkey_source_mask)
2871                         & ~hotkey_reserved_mask);
2872 }
2873
2874 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2875
2876 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2877
2878 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2879 static ssize_t hotkey_source_mask_show(struct device *dev,
2880                            struct device_attribute *attr,
2881                            char *buf)
2882 {
2883         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2884 }
2885
2886 static ssize_t hotkey_source_mask_store(struct device *dev,
2887                             struct device_attribute *attr,
2888                             const char *buf, size_t count)
2889 {
2890         unsigned long t;
2891         u32 r_ev;
2892         int rc;
2893
2894         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2895                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2896                 return -EINVAL;
2897
2898         if (mutex_lock_killable(&hotkey_mutex))
2899                 return -ERESTARTSYS;
2900
2901         HOTKEY_CONFIG_CRITICAL_START
2902         hotkey_source_mask = t;
2903         HOTKEY_CONFIG_CRITICAL_END
2904
2905         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2906                         ~hotkey_source_mask);
2907         hotkey_poll_setup(true);
2908
2909         /* check if events needed by the driver got disabled */
2910         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2911                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2912
2913         mutex_unlock(&hotkey_mutex);
2914
2915         if (rc < 0)
2916                 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2917
2918         if (r_ev)
2919                 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2920                           r_ev);
2921
2922         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2923
2924         return (rc < 0) ? rc : count;
2925 }
2926
2927 static DEVICE_ATTR_RW(hotkey_source_mask);
2928
2929 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2930 static ssize_t hotkey_poll_freq_show(struct device *dev,
2931                            struct device_attribute *attr,
2932                            char *buf)
2933 {
2934         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2935 }
2936
2937 static ssize_t hotkey_poll_freq_store(struct device *dev,
2938                             struct device_attribute *attr,
2939                             const char *buf, size_t count)
2940 {
2941         unsigned long t;
2942
2943         if (parse_strtoul(buf, 25, &t))
2944                 return -EINVAL;
2945
2946         if (mutex_lock_killable(&hotkey_mutex))
2947                 return -ERESTARTSYS;
2948
2949         hotkey_poll_set_freq(t);
2950         hotkey_poll_setup(true);
2951
2952         mutex_unlock(&hotkey_mutex);
2953
2954         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2955
2956         return count;
2957 }
2958
2959 static DEVICE_ATTR_RW(hotkey_poll_freq);
2960
2961 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2962
2963 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2964 static ssize_t hotkey_radio_sw_show(struct device *dev,
2965                            struct device_attribute *attr,
2966                            char *buf)
2967 {
2968         int res;
2969         res = hotkey_get_wlsw();
2970         if (res < 0)
2971                 return res;
2972
2973         /* Opportunistic update */
2974         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2975
2976         return snprintf(buf, PAGE_SIZE, "%d\n",
2977                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2978 }
2979
2980 static DEVICE_ATTR_RO(hotkey_radio_sw);
2981
2982 static void hotkey_radio_sw_notify_change(void)
2983 {
2984         if (tp_features.hotkey_wlsw)
2985                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2986                              "hotkey_radio_sw");
2987 }
2988
2989 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2990 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2991                            struct device_attribute *attr,
2992                            char *buf)
2993 {
2994         int res, s;
2995         res = hotkey_get_tablet_mode(&s);
2996         if (res < 0)
2997                 return res;
2998
2999         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
3000 }
3001
3002 static DEVICE_ATTR_RO(hotkey_tablet_mode);
3003
3004 static void hotkey_tablet_mode_notify_change(void)
3005 {
3006         if (tp_features.hotkey_tablet)
3007                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3008                              "hotkey_tablet_mode");
3009 }
3010
3011 /* sysfs wakeup reason (pollable) -------------------------------------- */
3012 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
3013                            struct device_attribute *attr,
3014                            char *buf)
3015 {
3016         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
3017 }
3018
3019 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
3020
3021 static void hotkey_wakeup_reason_notify_change(void)
3022 {
3023         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3024                      "wakeup_reason");
3025 }
3026
3027 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
3028 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
3029                            struct device_attribute *attr,
3030                            char *buf)
3031 {
3032         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
3033 }
3034
3035 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
3036                    hotkey_wakeup_hotunplug_complete_show, NULL);
3037
3038 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
3039 {
3040         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3041                      "wakeup_hotunplug_complete");
3042 }
3043
3044 /* sysfs adaptive kbd mode --------------------------------------------- */
3045
3046 static int adaptive_keyboard_get_mode(void);
3047 static int adaptive_keyboard_set_mode(int new_mode);
3048
3049 enum ADAPTIVE_KEY_MODE {
3050         HOME_MODE,
3051         WEB_BROWSER_MODE,
3052         WEB_CONFERENCE_MODE,
3053         FUNCTION_MODE,
3054         LAYFLAT_MODE
3055 };
3056
3057 static ssize_t adaptive_kbd_mode_show(struct device *dev,
3058                            struct device_attribute *attr,
3059                            char *buf)
3060 {
3061         int current_mode;
3062
3063         current_mode = adaptive_keyboard_get_mode();
3064         if (current_mode < 0)
3065                 return current_mode;
3066
3067         return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
3068 }
3069
3070 static ssize_t adaptive_kbd_mode_store(struct device *dev,
3071                             struct device_attribute *attr,
3072                             const char *buf, size_t count)
3073 {
3074         unsigned long t;
3075         int res;
3076
3077         if (parse_strtoul(buf, LAYFLAT_MODE, &t))
3078                 return -EINVAL;
3079
3080         res = adaptive_keyboard_set_mode(t);
3081         return (res < 0) ? res : count;
3082 }
3083
3084 static DEVICE_ATTR_RW(adaptive_kbd_mode);
3085
3086 static struct attribute *adaptive_kbd_attributes[] = {
3087         &dev_attr_adaptive_kbd_mode.attr,
3088         NULL
3089 };
3090
3091 static const struct attribute_group adaptive_kbd_attr_group = {
3092         .attrs = adaptive_kbd_attributes,
3093 };
3094
3095 /* --------------------------------------------------------------------- */
3096
3097 static struct attribute *hotkey_attributes[] __initdata = {
3098         &dev_attr_hotkey_enable.attr,
3099         &dev_attr_hotkey_bios_enabled.attr,
3100         &dev_attr_hotkey_bios_mask.attr,
3101         &dev_attr_wakeup_reason.attr,
3102         &dev_attr_wakeup_hotunplug_complete.attr,
3103         &dev_attr_hotkey_mask.attr,
3104         &dev_attr_hotkey_all_mask.attr,
3105         &dev_attr_hotkey_adaptive_all_mask.attr,
3106         &dev_attr_hotkey_recommended_mask.attr,
3107 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3108         &dev_attr_hotkey_source_mask.attr,
3109         &dev_attr_hotkey_poll_freq.attr,
3110 #endif
3111 };
3112
3113 /*
3114  * Sync both the hw and sw blocking state of all switches
3115  */
3116 static void tpacpi_send_radiosw_update(void)
3117 {
3118         int wlsw;
3119
3120         /*
3121          * We must sync all rfkill controllers *before* issuing any
3122          * rfkill input events, or we will race the rfkill core input
3123          * handler.
3124          *
3125          * tpacpi_inputdev_send_mutex works as a synchronization point
3126          * for the above.
3127          *
3128          * We optimize to avoid numerous calls to hotkey_get_wlsw.
3129          */
3130
3131         wlsw = hotkey_get_wlsw();
3132
3133         /* Sync hw blocking state first if it is hw-blocked */
3134         if (wlsw == TPACPI_RFK_RADIO_OFF)
3135                 tpacpi_rfk_update_hwblock_state(true);
3136
3137         /* Sync sw blocking state */
3138         tpacpi_rfk_update_swstate_all();
3139
3140         /* Sync hw blocking state last if it is hw-unblocked */
3141         if (wlsw == TPACPI_RFK_RADIO_ON)
3142                 tpacpi_rfk_update_hwblock_state(false);
3143
3144         /* Issue rfkill input event for WLSW switch */
3145         if (!(wlsw < 0)) {
3146                 mutex_lock(&tpacpi_inputdev_send_mutex);
3147
3148                 input_report_switch(tpacpi_inputdev,
3149                                     SW_RFKILL_ALL, (wlsw > 0));
3150                 input_sync(tpacpi_inputdev);
3151
3152                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3153         }
3154
3155         /*
3156          * this can be unconditional, as we will poll state again
3157          * if userspace uses the notify to read data
3158          */
3159         hotkey_radio_sw_notify_change();
3160 }
3161
3162 static void hotkey_exit(void)
3163 {
3164 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3165         mutex_lock(&hotkey_mutex);
3166         hotkey_poll_stop_sync();
3167         mutex_unlock(&hotkey_mutex);
3168 #endif
3169
3170         if (hotkey_dev_attributes)
3171                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3172
3173         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3174                    "restoring original HKEY status and mask\n");
3175         /* yes, there is a bitwise or below, we want the
3176          * functions to be called even if one of them fail */
3177         if (((tp_features.hotkey_mask &&
3178               hotkey_mask_set(hotkey_orig_mask)) |
3179              hotkey_status_set(false)) != 0)
3180                 pr_err("failed to restore hot key mask to BIOS defaults\n");
3181 }
3182
3183 static void __init hotkey_unmap(const unsigned int scancode)
3184 {
3185         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3186                 clear_bit(hotkey_keycode_map[scancode],
3187                           tpacpi_inputdev->keybit);
3188                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3189         }
3190 }
3191
3192 /*
3193  * HKEY quirks:
3194  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3195  */
3196
3197 #define TPACPI_HK_Q_INIMASK     0x0001
3198
3199 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3200         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3201         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3202         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3203         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3204         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3205         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3206         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3207         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3208         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3209         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3210         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3211         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3212         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3213         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3214         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3215         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3216         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3217         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3218         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3219 };
3220
3221 typedef u16 tpacpi_keymap_entry_t;
3222 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3223
3224 static int hotkey_init_tablet_mode(void)
3225 {
3226         int in_tablet_mode = 0, res;
3227         char *type = NULL;
3228
3229         if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3230                 int has_tablet_mode;
3231
3232                 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3233                                                              &has_tablet_mode);
3234                 if (has_tablet_mode)
3235                         tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3236                 type = "GMMS";
3237         } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3238                 /* For X41t, X60t, X61t Tablets... */
3239                 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3240                 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3241                 type = "MHKG";
3242         }
3243
3244         if (!tp_features.hotkey_tablet)
3245                 return 0;
3246
3247         pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3248                 type, in_tablet_mode ? "tablet" : "laptop");
3249
3250         res = add_to_attr_set(hotkey_dev_attributes,
3251                               &dev_attr_hotkey_tablet_mode.attr);
3252         if (res)
3253                 return -1;
3254
3255         return in_tablet_mode;
3256 }
3257
3258 static int __init hotkey_init(struct ibm_init_struct *iibm)
3259 {
3260         /* Requirements for changing the default keymaps:
3261          *
3262          * 1. Many of the keys are mapped to KEY_RESERVED for very
3263          *    good reasons.  Do not change them unless you have deep
3264          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3265          *    the various ThinkPad models.  The driver behaves
3266          *    differently for KEY_RESERVED: such keys have their
3267          *    hot key mask *unset* in mask_recommended, and also
3268          *    in the initial hot key mask programmed into the
3269          *    firmware at driver load time, which means the firm-
3270          *    ware may react very differently if you change them to
3271          *    something else;
3272          *
3273          * 2. You must be subscribed to the linux-thinkpad and
3274          *    ibm-acpi-devel mailing lists, and you should read the
3275          *    list archives since 2007 if you want to change the
3276          *    keymaps.  This requirement exists so that you will
3277          *    know the past history of problems with the thinkpad-
3278          *    acpi driver keymaps, and also that you will be
3279          *    listening to any bug reports;
3280          *
3281          * 3. Do not send thinkpad-acpi specific patches directly to
3282          *    for merging, *ever*.  Send them to the linux-acpi
3283          *    mailinglist for comments.  Merging is to be done only
3284          *    through acpi-test and the ACPI maintainer.
3285          *
3286          * If the above is too much to ask, don't change the keymap.
3287          * Ask the thinkpad-acpi maintainer to do it, instead.
3288          */
3289
3290         enum keymap_index {
3291                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3292                 TPACPI_KEYMAP_LENOVO_GENERIC,
3293         };
3294
3295         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3296         /* Generic keymap for IBM ThinkPads */
3297         [TPACPI_KEYMAP_IBM_GENERIC] = {
3298                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3299                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3300                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3301                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3302
3303                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3304                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3305                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3306                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3307
3308                 /* brightness: firmware always reacts to them */
3309                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3310                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3311
3312                 /* Thinklight: firmware always react to it */
3313                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3314
3315                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3316                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3317
3318                 /* Volume: firmware always react to it and reprograms
3319                  * the built-in *extra* mixer.  Never map it to control
3320                  * another mixer by default. */
3321                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3322                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3323                 KEY_RESERVED,   /* 0x16: MUTE */
3324
3325                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3326
3327                 /* (assignments unknown, please report if found) */
3328                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3329                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3330
3331                 /* No assignments, only used for Adaptive keyboards. */
3332                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3333                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337
3338                 /* No assignment, used for newer Lenovo models */
3339                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3340                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3341                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3342                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3343                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3344                 KEY_UNKNOWN, KEY_UNKNOWN
3345
3346                 },
3347
3348         /* Generic keymap for Lenovo ThinkPads */
3349         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3350                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3351                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3352                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3353                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3354
3355                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3356                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3357                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3358                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3359
3360                 /* These should be enabled --only-- when ACPI video
3361                  * is disabled (i.e. in "vendor" mode), and are handled
3362                  * in a special way by the init code */
3363                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3364                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3365
3366                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3367
3368                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3369                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3370
3371                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3372                  * react to it and reprograms the built-in *extra* mixer.
3373                  * Never map it to control another mixer by default.
3374                  *
3375                  * T60?, T61, R60?, R61: firmware and EC tries to send
3376                  * these over the regular keyboard, so these are no-ops,
3377                  * but there are still weird bugs re. MUTE, so do not
3378                  * change unless you get test reports from all Lenovo
3379                  * models.  May cause the BIOS to interfere with the
3380                  * HDA mixer.
3381                  */
3382                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3383                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3384                 KEY_RESERVED,   /* 0x16: MUTE */
3385
3386                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3387
3388                 /* (assignments unknown, please report if found) */
3389                 KEY_UNKNOWN, KEY_UNKNOWN,
3390
3391                 /*
3392                  * The mic mute button only sends 0x1a.  It does not
3393                  * automatically mute the mic or change the mute light.
3394                  */
3395                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3396
3397                 /* (assignments unknown, please report if found) */
3398                 KEY_UNKNOWN,
3399
3400                 /* Extra keys in use since the X240 / T440 / T540 */
3401                 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3402
3403                 /*
3404                  * These are the adaptive keyboard keycodes for Carbon X1 2014.
3405                  * The first item in this list is the Mute button which is
3406                  * emitted with 0x103 through
3407                  * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3408                  * symbol is held.
3409                  * We'll need to offset those by 0x20.
3410                  */
3411                 KEY_RESERVED,        /* Mute held, 0x103 */
3412                 KEY_BRIGHTNESS_MIN,  /* Backlight off */
3413                 KEY_RESERVED,        /* Clipping tool */
3414                 KEY_RESERVED,        /* Cloud */
3415                 KEY_RESERVED,
3416                 KEY_VOICECOMMAND,    /* Voice */
3417                 KEY_RESERVED,
3418                 KEY_RESERVED,        /* Gestures */
3419                 KEY_RESERVED,
3420                 KEY_RESERVED,
3421                 KEY_RESERVED,
3422                 KEY_CONFIG,          /* Settings */
3423                 KEY_RESERVED,        /* New tab */
3424                 KEY_REFRESH,         /* Reload */
3425                 KEY_BACK,            /* Back */
3426                 KEY_RESERVED,        /* Microphone down */
3427                 KEY_RESERVED,        /* Microphone up */
3428                 KEY_RESERVED,        /* Microphone cancellation */
3429                 KEY_RESERVED,        /* Camera mode */
3430                 KEY_RESERVED,        /* Rotate display, 0x116 */
3431
3432                 /*
3433                  * These are found in 2017 models (e.g. T470s, X270).
3434                  * The lowest known value is 0x311, which according to
3435                  * the manual should launch a user defined favorite
3436                  * application.
3437                  *
3438                  * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3439                  * corresponding to 0x34.
3440                  */
3441
3442                 /* (assignments unknown, please report if found) */
3443                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3444                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3445                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3446                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3447                 KEY_UNKNOWN,
3448
3449                 KEY_BOOKMARKS,       /* Favorite app, 0x311 */
3450                 KEY_RESERVED,        /* Clipping tool */
3451                 KEY_CALC,            /* Calculator (above numpad, P52) */
3452                 KEY_BLUETOOTH,       /* Bluetooth */
3453                 KEY_KEYBOARD         /* Keyboard, 0x315 */
3454                 },
3455         };
3456
3457         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3458                 /* Generic maps (fallback) */
3459                 {
3460                   .vendor = PCI_VENDOR_ID_IBM,
3461                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3462                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3463                 },
3464                 {
3465                   .vendor = PCI_VENDOR_ID_LENOVO,
3466                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3467                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3468                 },
3469         };
3470
3471 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3472 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3473
3474         int res, i;
3475         int status;
3476         int hkeyv;
3477         bool radiosw_state  = false;
3478         bool tabletsw_state = false;
3479
3480         unsigned long quirks;
3481         unsigned long keymap_id;
3482
3483         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3484                         "initializing hotkey subdriver\n");
3485
3486         BUG_ON(!tpacpi_inputdev);
3487         BUG_ON(tpacpi_inputdev->open != NULL ||
3488                tpacpi_inputdev->close != NULL);
3489
3490         TPACPI_ACPIHANDLE_INIT(hkey);
3491         mutex_init(&hotkey_mutex);
3492
3493 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3494         mutex_init(&hotkey_thread_data_mutex);
3495 #endif
3496
3497         /* hotkey not supported on 570 */
3498         tp_features.hotkey = hkey_handle != NULL;
3499
3500         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3501                 "hotkeys are %s\n",
3502                 str_supported(tp_features.hotkey));
3503
3504         if (!tp_features.hotkey)
3505                 return 1;
3506
3507         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3508                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3509
3510         tpacpi_disable_brightness_delay();
3511
3512         /* MUST have enough space for all attributes to be added to
3513          * hotkey_dev_attributes */
3514         hotkey_dev_attributes = create_attr_set(
3515                                         ARRAY_SIZE(hotkey_attributes) + 2,
3516                                         NULL);
3517         if (!hotkey_dev_attributes)
3518                 return -ENOMEM;
3519         res = add_many_to_attr_set(hotkey_dev_attributes,
3520                         hotkey_attributes,
3521                         ARRAY_SIZE(hotkey_attributes));
3522         if (res)
3523                 goto err_exit;
3524
3525         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3526            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3527            for HKEY interface version 0x100 */
3528         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3529                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3530                             "firmware HKEY interface version: 0x%x\n",
3531                             hkeyv);
3532
3533                 switch (hkeyv >> 8) {
3534                 case 1:
3535                         /*
3536                          * MHKV 0x100 in A31, R40, R40e,
3537                          * T4x, X31, and later
3538                          */
3539
3540                         /* Paranoia check AND init hotkey_all_mask */
3541                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3542                                         "MHKA", "qd")) {
3543                                 pr_err("missing MHKA handler, please report this to %s\n",
3544                                        TPACPI_MAIL);
3545                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3546                                 hotkey_all_mask = 0x080cU;
3547                         } else {
3548                                 tp_features.hotkey_mask = 1;
3549                         }
3550                         break;
3551
3552                 case 2:
3553                         /*
3554                          * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3555                          */
3556
3557                         /* Paranoia check AND init hotkey_all_mask */
3558                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3559                                         "MHKA", "dd", 1)) {
3560                                 pr_err("missing MHKA handler, please report this to %s\n",
3561                                        TPACPI_MAIL);
3562                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3563                                 hotkey_all_mask = 0x080cU;
3564                         } else {
3565                                 tp_features.hotkey_mask = 1;
3566                         }
3567
3568                         /*
3569                          * Check if we have an adaptive keyboard, like on the
3570                          * Lenovo Carbon X1 2014 (2nd Gen).
3571                          */
3572                         if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3573                                        "MHKA", "dd", 2)) {
3574                                 if (hotkey_adaptive_all_mask != 0) {
3575                                         tp_features.has_adaptive_kbd = true;
3576                                         res = sysfs_create_group(
3577                                                 &tpacpi_pdev->dev.kobj,
3578                                                 &adaptive_kbd_attr_group);
3579                                         if (res)
3580                                                 goto err_exit;
3581                                 }
3582                         } else {
3583                                 tp_features.has_adaptive_kbd = false;
3584                                 hotkey_adaptive_all_mask = 0x0U;
3585                         }
3586                         break;
3587
3588                 default:
3589                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3590                                hkeyv);
3591                         pr_err("please report this to %s\n", TPACPI_MAIL);
3592                         break;
3593                 }
3594         }
3595
3596         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3597                 "hotkey masks are %s\n",
3598                 str_supported(tp_features.hotkey_mask));
3599
3600         /* Init hotkey_all_mask if not initialized yet */
3601         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3602             (quirks & TPACPI_HK_Q_INIMASK))
3603                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3604
3605         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3606         if (tp_features.hotkey_mask) {
3607                 /* hotkey_source_mask *must* be zero for
3608                  * the first hotkey_mask_get to return hotkey_orig_mask */
3609                 res = hotkey_mask_get();
3610                 if (res)
3611                         goto err_exit;
3612
3613                 hotkey_orig_mask = hotkey_acpi_mask;
3614         } else {
3615                 hotkey_orig_mask = hotkey_all_mask;
3616                 hotkey_acpi_mask = hotkey_all_mask;
3617         }
3618
3619 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3620         if (dbg_wlswemul) {
3621                 tp_features.hotkey_wlsw = 1;
3622                 radiosw_state = !!tpacpi_wlsw_emulstate;
3623                 pr_info("radio switch emulation enabled\n");
3624         } else
3625 #endif
3626         /* Not all thinkpads have a hardware radio switch */
3627         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3628                 tp_features.hotkey_wlsw = 1;
3629                 radiosw_state = !!status;
3630                 pr_info("radio switch found; radios are %s\n",
3631                         enabled(status, 0));
3632         }
3633         if (tp_features.hotkey_wlsw)
3634                 res = add_to_attr_set(hotkey_dev_attributes,
3635                                 &dev_attr_hotkey_radio_sw.attr);
3636
3637         res = hotkey_init_tablet_mode();
3638         if (res < 0)
3639                 goto err_exit;
3640
3641         tabletsw_state = res;
3642
3643         res = register_attr_set_with_sysfs(hotkey_dev_attributes,
3644                                            &tpacpi_pdev->dev.kobj);
3645         if (res)
3646                 goto err_exit;
3647
3648         /* Set up key map */
3649         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3650                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3651         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3652         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3653                    "using keymap number %lu\n", keymap_id);
3654
3655         hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3656                         TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL);
3657         if (!hotkey_keycode_map) {
3658                 pr_err("failed to allocate memory for key map\n");
3659                 res = -ENOMEM;
3660                 goto err_exit;
3661         }
3662
3663         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3664         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3665         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3666         tpacpi_inputdev->keycode = hotkey_keycode_map;
3667         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3668                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3669                         input_set_capability(tpacpi_inputdev, EV_KEY,
3670                                                 hotkey_keycode_map[i]);
3671                 } else {
3672                         if (i < sizeof(hotkey_reserved_mask)*8)
3673                                 hotkey_reserved_mask |= 1 << i;
3674                 }
3675         }
3676
3677         if (tp_features.hotkey_wlsw) {
3678                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3679                 input_report_switch(tpacpi_inputdev,
3680                                     SW_RFKILL_ALL, radiosw_state);
3681         }
3682         if (tp_features.hotkey_tablet) {
3683                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3684                 input_report_switch(tpacpi_inputdev,
3685                                     SW_TABLET_MODE, tabletsw_state);
3686         }
3687
3688         /* Do not issue duplicate brightness change events to
3689          * userspace. tpacpi_detect_brightness_capabilities() must have
3690          * been called before this point  */
3691         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3692                 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3693                 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3694
3695                 /* Disable brightness up/down on Lenovo thinkpads when
3696                  * ACPI is handling them, otherwise it is plain impossible
3697                  * for userspace to do something even remotely sane */
3698                 hotkey_reserved_mask |=
3699                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3700                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3701                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3702                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3703         }
3704
3705 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3706         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3707                                 & ~hotkey_all_mask
3708                                 & ~hotkey_reserved_mask;
3709
3710         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3711                     "hotkey source mask 0x%08x, polling freq %u\n",
3712                     hotkey_source_mask, hotkey_poll_freq);
3713 #endif
3714
3715         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3716                         "enabling firmware HKEY event interface...\n");
3717         res = hotkey_status_set(true);
3718         if (res) {
3719                 hotkey_exit();
3720                 return res;
3721         }
3722         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3723                                | hotkey_driver_mask)
3724                               & ~hotkey_source_mask);
3725         if (res < 0 && res != -ENXIO) {
3726                 hotkey_exit();
3727                 return res;
3728         }
3729         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3730                                 & ~hotkey_reserved_mask;
3731         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3732                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3733                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3734
3735         tpacpi_inputdev->open = &hotkey_inputdev_open;
3736         tpacpi_inputdev->close = &hotkey_inputdev_close;
3737
3738         hotkey_poll_setup_safe(true);
3739
3740         return 0;
3741
3742 err_exit:
3743         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3744         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3745                         &adaptive_kbd_attr_group);
3746
3747         hotkey_dev_attributes = NULL;
3748
3749         return (res < 0) ? res : 1;
3750 }
3751
3752 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3753  * mode, Web conference mode, Function mode and Lay-flat mode.
3754  * We support Home mode and Function mode currently.
3755  *
3756  * Will consider support rest of modes in future.
3757  *
3758  */
3759 static const int adaptive_keyboard_modes[] = {
3760         HOME_MODE,
3761 /*      WEB_BROWSER_MODE = 2,
3762         WEB_CONFERENCE_MODE = 3, */
3763         FUNCTION_MODE
3764 };
3765
3766 #define DFR_CHANGE_ROW                  0x101
3767 #define DFR_SHOW_QUICKVIEW_ROW          0x102
3768 #define FIRST_ADAPTIVE_KEY              0x103
3769
3770 /* press Fn key a while second, it will switch to Function Mode. Then
3771  * release Fn key, previous mode be restored.
3772  */
3773 static bool adaptive_keyboard_mode_is_saved;
3774 static int adaptive_keyboard_prev_mode;
3775
3776 static int adaptive_keyboard_get_mode(void)
3777 {
3778         int mode = 0;
3779
3780         if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3781                 pr_err("Cannot read adaptive keyboard mode\n");
3782                 return -EIO;
3783         }
3784
3785         return mode;
3786 }
3787
3788 static int adaptive_keyboard_set_mode(int new_mode)
3789 {
3790         if (new_mode < 0 ||
3791                 new_mode > LAYFLAT_MODE)
3792                 return -EINVAL;
3793
3794         if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3795                 pr_err("Cannot set adaptive keyboard mode\n");
3796                 return -EIO;
3797         }
3798
3799         return 0;
3800 }
3801
3802 static int adaptive_keyboard_get_next_mode(int mode)
3803 {
3804         size_t i;
3805         size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3806
3807         for (i = 0; i <= max_mode; i++) {
3808                 if (adaptive_keyboard_modes[i] == mode)
3809                         break;
3810         }
3811
3812         if (i >= max_mode)
3813                 i = 0;
3814         else
3815                 i++;
3816
3817         return adaptive_keyboard_modes[i];
3818 }
3819
3820 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3821 {
3822         int current_mode = 0;
3823         int new_mode = 0;
3824         int keycode;
3825
3826         switch (scancode) {
3827         case DFR_CHANGE_ROW:
3828                 if (adaptive_keyboard_mode_is_saved) {
3829                         new_mode = adaptive_keyboard_prev_mode;
3830                         adaptive_keyboard_mode_is_saved = false;
3831                 } else {
3832                         current_mode = adaptive_keyboard_get_mode();
3833                         if (current_mode < 0)
3834                                 return false;
3835                         new_mode = adaptive_keyboard_get_next_mode(
3836                                         current_mode);
3837                 }
3838
3839                 if (adaptive_keyboard_set_mode(new_mode) < 0)
3840                         return false;
3841
3842                 return true;
3843
3844         case DFR_SHOW_QUICKVIEW_ROW:
3845                 current_mode = adaptive_keyboard_get_mode();
3846                 if (current_mode < 0)
3847                         return false;
3848
3849                 adaptive_keyboard_prev_mode = current_mode;
3850                 adaptive_keyboard_mode_is_saved = true;
3851
3852                 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3853                         return false;
3854                 return true;
3855
3856         default:
3857                 if (scancode < FIRST_ADAPTIVE_KEY ||
3858                     scancode >= FIRST_ADAPTIVE_KEY +
3859                     TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3860                     TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3861                         pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3862                                 scancode);
3863                         return false;
3864                 }
3865                 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3866                                              TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3867                 if (keycode != KEY_RESERVED) {
3868                         mutex_lock(&tpacpi_inputdev_send_mutex);
3869
3870                         input_report_key(tpacpi_inputdev, keycode, 1);
3871                         input_sync(tpacpi_inputdev);
3872
3873                         input_report_key(tpacpi_inputdev, keycode, 0);
3874                         input_sync(tpacpi_inputdev);
3875
3876                         mutex_unlock(&tpacpi_inputdev_send_mutex);
3877                 }
3878                 return true;
3879         }
3880 }
3881
3882 static bool hotkey_notify_hotkey(const u32 hkey,
3883                                  bool *send_acpi_ev,
3884                                  bool *ignore_acpi_ev)
3885 {
3886         /* 0x1000-0x1FFF: key presses */
3887         unsigned int scancode = hkey & 0xfff;
3888         *send_acpi_ev = true;
3889         *ignore_acpi_ev = false;
3890
3891         /*
3892          * Original events are in the 0x10XX range, the adaptive keyboard
3893          * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3894          * models, additional keys are emitted through 0x13XX.
3895          */
3896         switch ((hkey >> 8) & 0xf) {
3897         case 0:
3898                 if (scancode > 0 &&
3899                     scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3900                         /* HKEY event 0x1001 is scancode 0x00 */
3901                         scancode--;
3902                         if (!(hotkey_source_mask & (1 << scancode))) {
3903                                 tpacpi_input_send_key_masked(scancode);
3904                                 *send_acpi_ev = false;
3905                         } else {
3906                                 *ignore_acpi_ev = true;
3907                         }
3908                         return true;
3909                 }
3910                 break;
3911
3912         case 1:
3913                 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3914
3915         case 3:
3916                 /* Extended keycodes start at 0x300 and our offset into the map
3917                  * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3918                  * will be positive, but might not be in the correct range.
3919                  */
3920                 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3921                 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3922                     scancode < TPACPI_HOTKEY_MAP_LEN) {
3923                         tpacpi_input_send_key(scancode);
3924                         return true;
3925                 }
3926                 break;
3927         }
3928
3929         return false;
3930 }
3931
3932 static bool hotkey_notify_wakeup(const u32 hkey,
3933                                  bool *send_acpi_ev,
3934                                  bool *ignore_acpi_ev)
3935 {
3936         /* 0x2000-0x2FFF: Wakeup reason */
3937         *send_acpi_ev = true;
3938         *ignore_acpi_ev = false;
3939
3940         switch (hkey) {
3941         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3942         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3943                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3944                 *ignore_acpi_ev = true;
3945                 break;
3946
3947         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3948         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3949                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3950                 *ignore_acpi_ev = true;
3951                 break;
3952
3953         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3954         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3955                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3956                 /* how to auto-heal: */
3957                 /* 2313: woke up from S3, go to S4/S5 */
3958                 /* 2413: woke up from S4, go to S5 */
3959                 break;
3960
3961         default:
3962                 return false;
3963         }
3964
3965         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3966                 pr_info("woke up due to a hot-unplug request...\n");
3967                 hotkey_wakeup_reason_notify_change();
3968         }
3969         return true;
3970 }
3971
3972 static bool hotkey_notify_dockevent(const u32 hkey,
3973                                  bool *send_acpi_ev,
3974                                  bool *ignore_acpi_ev)
3975 {
3976         /* 0x4000-0x4FFF: dock-related events */
3977         *send_acpi_ev = true;
3978         *ignore_acpi_ev = false;
3979
3980         switch (hkey) {
3981         case TP_HKEY_EV_UNDOCK_ACK:
3982                 /* ACPI undock operation completed after wakeup */
3983                 hotkey_autosleep_ack = 1;
3984                 pr_info("undocked\n");
3985                 hotkey_wakeup_hotunplug_complete_notify_change();
3986                 return true;
3987
3988         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3989                 pr_info("docked into hotplug port replicator\n");
3990                 return true;
3991         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3992                 pr_info("undocked from hotplug port replicator\n");
3993                 return true;
3994
3995         default:
3996                 return false;
3997         }
3998 }
3999
4000 static bool hotkey_notify_usrevent(const u32 hkey,
4001                                  bool *send_acpi_ev,
4002                                  bool *ignore_acpi_ev)
4003 {
4004         /* 0x5000-0x5FFF: human interface helpers */
4005         *send_acpi_ev = true;
4006         *ignore_acpi_ev = false;
4007
4008         switch (hkey) {
4009         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
4010         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
4011                 return true;
4012
4013         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
4014         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
4015                 tpacpi_input_send_tabletsw();
4016                 hotkey_tablet_mode_notify_change();
4017                 *send_acpi_ev = false;
4018                 return true;
4019
4020         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
4021         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
4022         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
4023                 /* do not propagate these events */
4024                 *ignore_acpi_ev = true;
4025                 return true;
4026
4027         default:
4028                 return false;
4029         }
4030 }
4031
4032 static void thermal_dump_all_sensors(void);
4033
4034 static bool hotkey_notify_6xxx(const u32 hkey,
4035                                  bool *send_acpi_ev,
4036                                  bool *ignore_acpi_ev)
4037 {
4038         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
4039         *send_acpi_ev = true;
4040         *ignore_acpi_ev = false;
4041
4042         switch (hkey) {
4043         case TP_HKEY_EV_THM_TABLE_CHANGED:
4044                 pr_debug("EC reports: Thermal Table has changed\n");
4045                 /* recommended action: do nothing, we don't have
4046                  * Lenovo ATM information */
4047                 return true;
4048         case TP_HKEY_EV_THM_CSM_COMPLETED:
4049                 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
4050                 /* recommended action: do nothing, we don't have
4051                  * Lenovo ATM information */
4052                 return true;
4053         case TP_HKEY_EV_THM_TRANSFM_CHANGED:
4054                 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
4055                 /* recommended action: do nothing, we don't have
4056                  * Lenovo ATM information */
4057                 return true;
4058         case TP_HKEY_EV_ALARM_BAT_HOT:
4059                 pr_crit("THERMAL ALARM: battery is too hot!\n");
4060                 /* recommended action: warn user through gui */
4061                 break;
4062         case TP_HKEY_EV_ALARM_BAT_XHOT:
4063                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
4064                 /* recommended action: immediate sleep/hibernate */
4065                 break;
4066         case TP_HKEY_EV_ALARM_SENSOR_HOT:
4067                 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
4068                 /* recommended action: warn user through gui, that */
4069                 /* some internal component is too hot */
4070                 break;
4071         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
4072                 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
4073                 /* recommended action: immediate sleep/hibernate */
4074                 break;
4075         case TP_HKEY_EV_AC_CHANGED:
4076                 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
4077                  * AC status changed; can be triggered by plugging or
4078                  * unplugging AC adapter, docking or undocking. */
4079
4080                 /* fallthrough */
4081
4082         case TP_HKEY_EV_KEY_NUMLOCK:
4083         case TP_HKEY_EV_KEY_FN:
4084         case TP_HKEY_EV_KEY_FN_ESC:
4085                 /* key press events, we just ignore them as long as the EC
4086                  * is still reporting them in the normal keyboard stream */
4087                 *send_acpi_ev = false;
4088                 *ignore_acpi_ev = true;
4089                 return true;
4090
4091         case TP_HKEY_EV_TABLET_CHANGED:
4092                 tpacpi_input_send_tabletsw();
4093                 hotkey_tablet_mode_notify_change();
4094                 *send_acpi_ev = false;
4095                 return true;
4096
4097         case TP_HKEY_EV_PALM_DETECTED:
4098         case TP_HKEY_EV_PALM_UNDETECTED:
4099                 /* palm detected hovering the keyboard, forward to user-space
4100                  * via netlink for consumption */
4101                 return true;
4102
4103         default:
4104                 /* report simply as unknown, no sensor dump */
4105                 return false;
4106         }
4107
4108         thermal_dump_all_sensors();
4109         return true;
4110 }
4111
4112 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4113 {
4114         u32 hkey;
4115         bool send_acpi_ev;
4116         bool ignore_acpi_ev;
4117         bool known_ev;
4118
4119         if (event != 0x80) {
4120                 pr_err("unknown HKEY notification event %d\n", event);
4121                 /* forward it to userspace, maybe it knows how to handle it */
4122                 acpi_bus_generate_netlink_event(
4123                                         ibm->acpi->device->pnp.device_class,
4124                                         dev_name(&ibm->acpi->device->dev),
4125                                         event, 0);
4126                 return;
4127         }
4128
4129         while (1) {
4130                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4131                         pr_err("failed to retrieve HKEY event\n");
4132                         return;
4133                 }
4134
4135                 if (hkey == 0) {
4136                         /* queue empty */
4137                         return;
4138                 }
4139
4140                 send_acpi_ev = true;
4141                 ignore_acpi_ev = false;
4142
4143                 switch (hkey >> 12) {
4144                 case 1:
4145                         /* 0x1000-0x1FFF: key presses */
4146                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4147                                                  &ignore_acpi_ev);
4148                         break;
4149                 case 2:
4150                         /* 0x2000-0x2FFF: Wakeup reason */
4151                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4152                                                  &ignore_acpi_ev);
4153                         break;
4154                 case 3:
4155                         /* 0x3000-0x3FFF: bay-related wakeups */
4156                         switch (hkey) {
4157                         case TP_HKEY_EV_BAYEJ_ACK:
4158                                 hotkey_autosleep_ack = 1;
4159                                 pr_info("bay ejected\n");
4160                                 hotkey_wakeup_hotunplug_complete_notify_change();
4161                                 known_ev = true;
4162                                 break;
4163                         case TP_HKEY_EV_OPTDRV_EJ:
4164                                 /* FIXME: kick libata if SATA link offline */
4165                                 known_ev = true;
4166                                 break;
4167                         default:
4168                                 known_ev = false;
4169                         }
4170                         break;
4171                 case 4:
4172                         /* 0x4000-0x4FFF: dock-related events */
4173                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4174                                                 &ignore_acpi_ev);
4175                         break;
4176                 case 5:
4177                         /* 0x5000-0x5FFF: human interface helpers */
4178                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4179                                                  &ignore_acpi_ev);
4180                         break;
4181                 case 6:
4182                         /* 0x6000-0x6FFF: thermal alarms/notices and
4183                          *                keyboard events */
4184                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4185                                                  &ignore_acpi_ev);
4186                         break;
4187                 case 7:
4188                         /* 0x7000-0x7FFF: misc */
4189                         if (tp_features.hotkey_wlsw &&
4190                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4191                                 tpacpi_send_radiosw_update();
4192                                 send_acpi_ev = 0;
4193                                 known_ev = true;
4194                                 break;
4195                         }
4196                         /* fallthrough - to default */
4197                 default:
4198                         known_ev = false;
4199                 }
4200                 if (!known_ev) {
4201                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4202                         pr_notice("please report the conditions when this event happened to %s\n",
4203                                   TPACPI_MAIL);
4204                 }
4205
4206                 /* netlink events */
4207                 if (!ignore_acpi_ev && send_acpi_ev) {
4208                         acpi_bus_generate_netlink_event(
4209                                         ibm->acpi->device->pnp.device_class,
4210                                         dev_name(&ibm->acpi->device->dev),
4211                                         event, hkey);
4212                 }
4213         }
4214 }
4215
4216 static void hotkey_suspend(void)
4217 {
4218         /* Do these on suspend, we get the events on early resume! */
4219         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4220         hotkey_autosleep_ack = 0;
4221
4222         /* save previous mode of adaptive keyboard of X1 Carbon */
4223         if (tp_features.has_adaptive_kbd) {
4224                 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4225                                         "GTRW", "dd", 0)) {
4226                         pr_err("Cannot read adaptive keyboard mode.\n");
4227                 }
4228         }
4229 }
4230
4231 static void hotkey_resume(void)
4232 {
4233         tpacpi_disable_brightness_delay();
4234
4235         if (hotkey_status_set(true) < 0 ||
4236             hotkey_mask_set(hotkey_acpi_mask) < 0)
4237                 pr_err("error while attempting to reset the event firmware interface\n");
4238
4239         tpacpi_send_radiosw_update();
4240         hotkey_tablet_mode_notify_change();
4241         hotkey_wakeup_reason_notify_change();
4242         hotkey_wakeup_hotunplug_complete_notify_change();
4243         hotkey_poll_setup_safe(false);
4244
4245         /* restore previous mode of adapive keyboard of X1 Carbon */
4246         if (tp_features.has_adaptive_kbd) {
4247                 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4248                                         adaptive_keyboard_prev_mode)) {
4249                         pr_err("Cannot set adaptive keyboard mode.\n");
4250                 }
4251         }
4252 }
4253
4254 /* procfs -------------------------------------------------------------- */
4255 static int hotkey_read(struct seq_file *m)
4256 {
4257         int res, status;
4258
4259         if (!tp_features.hotkey) {
4260                 seq_printf(m, "status:\t\tnot supported\n");
4261                 return 0;
4262         }
4263
4264         if (mutex_lock_killable(&hotkey_mutex))
4265                 return -ERESTARTSYS;
4266         res = hotkey_status_get(&status);
4267         if (!res)
4268                 res = hotkey_mask_get();
4269         mutex_unlock(&hotkey_mutex);
4270         if (res)
4271                 return res;
4272
4273         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4274         if (hotkey_all_mask) {
4275                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4276                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4277         } else {
4278                 seq_printf(m, "mask:\t\tnot supported\n");
4279                 seq_printf(m, "commands:\tenable, disable, reset\n");
4280         }
4281
4282         return 0;
4283 }
4284
4285 static void hotkey_enabledisable_warn(bool enable)
4286 {
4287         tpacpi_log_usertask("procfs hotkey enable/disable");
4288         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4289                   pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
4290                 pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
4291 }
4292
4293 static int hotkey_write(char *buf)
4294 {
4295         int res;
4296         u32 mask;
4297         char *cmd;
4298
4299         if (!tp_features.hotkey)
4300                 return -ENODEV;
4301
4302         if (mutex_lock_killable(&hotkey_mutex))
4303                 return -ERESTARTSYS;
4304
4305         mask = hotkey_user_mask;
4306
4307         res = 0;
4308         while ((cmd = next_cmd(&buf))) {
4309                 if (strlencmp(cmd, "enable") == 0) {
4310                         hotkey_enabledisable_warn(1);
4311                 } else if (strlencmp(cmd, "disable") == 0) {
4312                         hotkey_enabledisable_warn(0);
4313                         res = -EPERM;
4314                 } else if (strlencmp(cmd, "reset") == 0) {
4315                         mask = (hotkey_all_mask | hotkey_source_mask)
4316                                 & ~hotkey_reserved_mask;
4317                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4318                         /* mask set */
4319                 } else if (sscanf(cmd, "%x", &mask) == 1) {
4320                         /* mask set */
4321                 } else {
4322                         res = -EINVAL;
4323                         goto errexit;
4324                 }
4325         }
4326
4327         if (!res) {
4328                 tpacpi_disclose_usertask("procfs hotkey",
4329                         "set mask to 0x%08x\n", mask);
4330                 res = hotkey_user_mask_set(mask);
4331         }
4332
4333 errexit:
4334         mutex_unlock(&hotkey_mutex);
4335         return res;
4336 }
4337
4338 static const struct acpi_device_id ibm_htk_device_ids[] = {
4339         {TPACPI_ACPI_IBM_HKEY_HID, 0},
4340         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4341         {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4342         {"", 0},
4343 };
4344
4345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4346         .hid = ibm_htk_device_ids,
4347         .notify = hotkey_notify,
4348         .handle = &hkey_handle,
4349         .type = ACPI_DEVICE_NOTIFY,
4350 };
4351
4352 static struct ibm_struct hotkey_driver_data = {
4353         .name = "hotkey",
4354         .read = hotkey_read,
4355         .write = hotkey_write,
4356         .exit = hotkey_exit,
4357         .resume = hotkey_resume,
4358         .suspend = hotkey_suspend,
4359         .acpi = &ibm_hotkey_acpidriver,
4360 };
4361
4362 /*************************************************************************
4363  * Bluetooth subdriver
4364  */
4365
4366 enum {
4367         /* ACPI GBDC/SBDC bits */
4368         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
4369         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
4370         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
4371                                                    0 = disable, 1 = enable */
4372 };
4373
4374 enum {
4375         /* ACPI \BLTH commands */
4376         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
4377         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
4378         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
4379         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
4380         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
4381 };
4382
4383 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
4384
4385 static int bluetooth_get_status(void)
4386 {
4387         int status;
4388
4389 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4390         if (dbg_bluetoothemul)
4391                 return (tpacpi_bluetooth_emulstate) ?
4392                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4393 #endif
4394
4395         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4396                 return -EIO;
4397
4398         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4399                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4400 }
4401
4402 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4403 {
4404         int status;
4405
4406         vdbg_printk(TPACPI_DBG_RFKILL,
4407                 "will attempt to %s bluetooth\n",
4408                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4409
4410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4411         if (dbg_bluetoothemul) {
4412                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4413                 return 0;
4414         }
4415 #endif
4416
4417         if (state == TPACPI_RFK_RADIO_ON)
4418                 status = TP_ACPI_BLUETOOTH_RADIOSSW
4419                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
4420         else
4421                 status = 0;
4422
4423         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4424                 return -EIO;
4425
4426         return 0;
4427 }
4428
4429 /* sysfs bluetooth enable ---------------------------------------------- */
4430 static ssize_t bluetooth_enable_show(struct device *dev,
4431                            struct device_attribute *attr,
4432                            char *buf)
4433 {
4434         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4435                         attr, buf);
4436 }
4437
4438 static ssize_t bluetooth_enable_store(struct device *dev,
4439                             struct device_attribute *attr,
4440                             const char *buf, size_t count)
4441 {
4442         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4443                                 attr, buf, count);
4444 }
4445
4446 static DEVICE_ATTR_RW(bluetooth_enable);
4447
4448 /* --------------------------------------------------------------------- */
4449
4450 static struct attribute *bluetooth_attributes[] = {
4451         &dev_attr_bluetooth_enable.attr,
4452         NULL
4453 };
4454
4455 static const struct attribute_group bluetooth_attr_group = {
4456         .attrs = bluetooth_attributes,
4457 };
4458
4459 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4460         .get_status = bluetooth_get_status,
4461         .set_status = bluetooth_set_status,
4462 };
4463
4464 static void bluetooth_shutdown(void)
4465 {
4466         /* Order firmware to save current state to NVRAM */
4467         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4468                         TP_ACPI_BLTH_SAVE_STATE))
4469                 pr_notice("failed to save bluetooth state to NVRAM\n");
4470         else
4471                 vdbg_printk(TPACPI_DBG_RFKILL,
4472                         "bluetooth state saved to NVRAM\n");
4473 }
4474
4475 static void bluetooth_exit(void)
4476 {
4477         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4478                         &bluetooth_attr_group);
4479
4480         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4481
4482         bluetooth_shutdown();
4483 }
4484
4485 static const struct dmi_system_id bt_fwbug_list[] __initconst = {
4486         {
4487                 .ident = "ThinkPad E485",
4488                 .matches = {
4489                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4490                         DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4491                 },
4492         },
4493         {
4494                 .ident = "ThinkPad E585",
4495                 .matches = {
4496                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4497                         DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4498                 },
4499         },
4500         {
4501                 .ident = "ThinkPad A285 - 20MW",
4502                 .matches = {
4503                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4504                         DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4505                 },
4506         },
4507         {
4508                 .ident = "ThinkPad A285 - 20MX",
4509                 .matches = {
4510                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4511                         DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4512                 },
4513         },
4514         {
4515                 .ident = "ThinkPad A485 - 20MU",
4516                 .matches = {
4517                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4518                         DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4519                 },
4520         },
4521         {
4522                 .ident = "ThinkPad A485 - 20MV",
4523                 .matches = {
4524                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4525                         DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4526                 },
4527         },
4528         {}
4529 };
4530
4531 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4532         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4533         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4534         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4535         {}
4536 };
4537
4538
4539 static int __init have_bt_fwbug(void)
4540 {
4541         /*
4542          * Some AMD based ThinkPads have a firmware bug that calling
4543          * "GBDC" will cause bluetooth on Intel wireless cards blocked
4544          */
4545         if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) {
4546                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4547                         FW_BUG "disable bluetooth subdriver for Intel cards\n");
4548                 return 1;
4549         } else
4550                 return 0;
4551 }
4552
4553 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4554 {
4555         int res;
4556         int status = 0;
4557
4558         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4559                         "initializing bluetooth subdriver\n");
4560
4561         TPACPI_ACPIHANDLE_INIT(hkey);
4562
4563         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4564            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4565         tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4566             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4567
4568         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4569                 "bluetooth is %s, status 0x%02x\n",
4570                 str_supported(tp_features.bluetooth),
4571                 status);
4572
4573 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4574         if (dbg_bluetoothemul) {
4575                 tp_features.bluetooth = 1;
4576                 pr_info("bluetooth switch emulation enabled\n");
4577         } else
4578 #endif
4579         if (tp_features.bluetooth &&
4580             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4581                 /* no bluetooth hardware present in system */
4582                 tp_features.bluetooth = 0;
4583                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4584                            "bluetooth hardware not installed\n");
4585         }
4586
4587         if (!tp_features.bluetooth)
4588                 return 1;
4589
4590         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4591                                 &bluetooth_tprfk_ops,
4592                                 RFKILL_TYPE_BLUETOOTH,
4593                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4594                                 true);
4595         if (res)
4596                 return res;
4597
4598         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4599                                 &bluetooth_attr_group);
4600         if (res) {
4601                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4602                 return res;
4603         }
4604
4605         return 0;
4606 }
4607
4608 /* procfs -------------------------------------------------------------- */
4609 static int bluetooth_read(struct seq_file *m)
4610 {
4611         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4612 }
4613
4614 static int bluetooth_write(char *buf)
4615 {
4616         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4617 }
4618
4619 static struct ibm_struct bluetooth_driver_data = {
4620         .name = "bluetooth",
4621         .read = bluetooth_read,
4622         .write = bluetooth_write,
4623         .exit = bluetooth_exit,
4624         .shutdown = bluetooth_shutdown,
4625 };
4626
4627 /*************************************************************************
4628  * Wan subdriver
4629  */
4630
4631 enum {
4632         /* ACPI GWAN/SWAN bits */
4633         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4634         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4635         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4636                                                    0 = disable, 1 = enable */
4637 };
4638
4639 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4640
4641 static int wan_get_status(void)
4642 {
4643         int status;
4644
4645 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4646         if (dbg_wwanemul)
4647                 return (tpacpi_wwan_emulstate) ?
4648                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4649 #endif
4650
4651         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4652                 return -EIO;
4653
4654         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4655                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4656 }
4657
4658 static int wan_set_status(enum tpacpi_rfkill_state state)
4659 {
4660         int status;
4661
4662         vdbg_printk(TPACPI_DBG_RFKILL,
4663                 "will attempt to %s wwan\n",
4664                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4665
4666 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4667         if (dbg_wwanemul) {
4668                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4669                 return 0;
4670         }
4671 #endif
4672
4673         if (state == TPACPI_RFK_RADIO_ON)
4674                 status = TP_ACPI_WANCARD_RADIOSSW
4675                          | TP_ACPI_WANCARD_RESUMECTRL;
4676         else
4677                 status = 0;
4678
4679         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4680                 return -EIO;
4681
4682         return 0;
4683 }
4684
4685 /* sysfs wan enable ---------------------------------------------------- */
4686 static ssize_t wan_enable_show(struct device *dev,
4687                            struct device_attribute *attr,
4688                            char *buf)
4689 {
4690         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4691                         attr, buf);
4692 }
4693
4694 static ssize_t wan_enable_store(struct device *dev,
4695                             struct device_attribute *attr,
4696                             const char *buf, size_t count)
4697 {
4698         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4699                         attr, buf, count);
4700 }
4701
4702 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4703                    wan_enable_show, wan_enable_store);
4704
4705 /* --------------------------------------------------------------------- */
4706
4707 static struct attribute *wan_attributes[] = {
4708         &dev_attr_wwan_enable.attr,
4709         NULL
4710 };
4711
4712 static const struct attribute_group wan_attr_group = {
4713         .attrs = wan_attributes,
4714 };
4715
4716 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4717         .get_status = wan_get_status,
4718         .set_status = wan_set_status,
4719 };
4720
4721 static void wan_shutdown(void)
4722 {
4723         /* Order firmware to save current state to NVRAM */
4724         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4725                         TP_ACPI_WGSV_SAVE_STATE))
4726                 pr_notice("failed to save WWAN state to NVRAM\n");
4727         else
4728                 vdbg_printk(TPACPI_DBG_RFKILL,
4729                         "WWAN state saved to NVRAM\n");
4730 }
4731
4732 static void wan_exit(void)
4733 {
4734         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4735                 &wan_attr_group);
4736
4737         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4738
4739         wan_shutdown();
4740 }
4741
4742 static int __init wan_init(struct ibm_init_struct *iibm)
4743 {
4744         int res;
4745         int status = 0;
4746
4747         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4748                         "initializing wan subdriver\n");
4749
4750         TPACPI_ACPIHANDLE_INIT(hkey);
4751
4752         tp_features.wan = hkey_handle &&
4753             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4754
4755         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4756                 "wan is %s, status 0x%02x\n",
4757                 str_supported(tp_features.wan),
4758                 status);
4759
4760 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4761         if (dbg_wwanemul) {
4762                 tp_features.wan = 1;
4763                 pr_info("wwan switch emulation enabled\n");
4764         } else
4765 #endif
4766         if (tp_features.wan &&
4767             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4768                 /* no wan hardware present in system */
4769                 tp_features.wan = 0;
4770                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4771                            "wan hardware not installed\n");
4772         }
4773
4774         if (!tp_features.wan)
4775                 return 1;
4776
4777         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4778                                 &wan_tprfk_ops,
4779                                 RFKILL_TYPE_WWAN,
4780                                 TPACPI_RFK_WWAN_SW_NAME,
4781                                 true);
4782         if (res)
4783                 return res;
4784
4785         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4786                                 &wan_attr_group);
4787
4788         if (res) {
4789                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4790                 return res;
4791         }
4792
4793         return 0;
4794 }
4795
4796 /* procfs -------------------------------------------------------------- */
4797 static int wan_read(struct seq_file *m)
4798 {
4799         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4800 }
4801
4802 static int wan_write(char *buf)
4803 {
4804         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4805 }
4806
4807 static struct ibm_struct wan_driver_data = {
4808         .name = "wan",
4809         .read = wan_read,
4810         .write = wan_write,
4811         .exit = wan_exit,
4812         .shutdown = wan_shutdown,
4813 };
4814
4815 /*************************************************************************
4816  * UWB subdriver
4817  */
4818
4819 enum {
4820         /* ACPI GUWB/SUWB bits */
4821         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4822         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4823 };
4824
4825 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4826
4827 static int uwb_get_status(void)
4828 {
4829         int status;
4830
4831 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4832         if (dbg_uwbemul)
4833                 return (tpacpi_uwb_emulstate) ?
4834                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4835 #endif
4836
4837         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4838                 return -EIO;
4839
4840         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4841                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4842 }
4843
4844 static int uwb_set_status(enum tpacpi_rfkill_state state)
4845 {
4846         int status;
4847
4848         vdbg_printk(TPACPI_DBG_RFKILL,
4849                 "will attempt to %s UWB\n",
4850                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4851
4852 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4853         if (dbg_uwbemul) {
4854                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4855                 return 0;
4856         }
4857 #endif
4858
4859         if (state == TPACPI_RFK_RADIO_ON)
4860                 status = TP_ACPI_UWB_RADIOSSW;
4861         else
4862                 status = 0;
4863
4864         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4865                 return -EIO;
4866
4867         return 0;
4868 }
4869
4870 /* --------------------------------------------------------------------- */
4871
4872 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4873         .get_status = uwb_get_status,
4874         .set_status = uwb_set_status,
4875 };
4876
4877 static void uwb_exit(void)
4878 {
4879         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4880 }
4881
4882 static int __init uwb_init(struct ibm_init_struct *iibm)
4883 {
4884         int res;
4885         int status = 0;
4886
4887         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4888                         "initializing uwb subdriver\n");
4889
4890         TPACPI_ACPIHANDLE_INIT(hkey);
4891
4892         tp_features.uwb = hkey_handle &&
4893             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4894
4895         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4896                 "uwb is %s, status 0x%02x\n",
4897                 str_supported(tp_features.uwb),
4898                 status);
4899
4900 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4901         if (dbg_uwbemul) {
4902                 tp_features.uwb = 1;
4903                 pr_info("uwb switch emulation enabled\n");
4904         } else
4905 #endif
4906         if (tp_features.uwb &&
4907             !(status & TP_ACPI_UWB_HWPRESENT)) {
4908                 /* no uwb hardware present in system */
4909                 tp_features.uwb = 0;
4910                 dbg_printk(TPACPI_DBG_INIT,
4911                            "uwb hardware not installed\n");
4912         }
4913
4914         if (!tp_features.uwb)
4915                 return 1;
4916
4917         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4918                                 &uwb_tprfk_ops,
4919                                 RFKILL_TYPE_UWB,
4920                                 TPACPI_RFK_UWB_SW_NAME,
4921                                 false);
4922         return res;
4923 }
4924
4925 static struct ibm_struct uwb_driver_data = {
4926         .name = "uwb",
4927         .exit = uwb_exit,
4928         .flags.experimental = 1,
4929 };
4930
4931 /*************************************************************************
4932  * Video subdriver
4933  */
4934
4935 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4936
4937 enum video_access_mode {
4938         TPACPI_VIDEO_NONE = 0,
4939         TPACPI_VIDEO_570,       /* 570 */
4940         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4941         TPACPI_VIDEO_NEW,       /* all others */
4942 };
4943
4944 enum {  /* video status flags, based on VIDEO_570 */
4945         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4946         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4947         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4948 };
4949
4950 enum {  /* TPACPI_VIDEO_570 constants */
4951         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4952         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4953                                                  * video_status_flags */
4954         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4955         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4956 };
4957
4958 static enum video_access_mode video_supported;
4959 static int video_orig_autosw;
4960
4961 static int video_autosw_get(void);
4962 static int video_autosw_set(int enable);
4963
4964 TPACPI_HANDLE(vid, root,
4965               "\\_SB.PCI.AGP.VGA",      /* 570 */
4966               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4967               "\\_SB.PCI0.VID0",        /* 770e */
4968               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4969               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4970               "\\_SB.PCI0.AGP.VID",     /* all others */
4971         );                              /* R30, R31 */
4972
4973 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4974
4975 static int __init video_init(struct ibm_init_struct *iibm)
4976 {
4977         int ivga;
4978
4979         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4980
4981         TPACPI_ACPIHANDLE_INIT(vid);
4982         if (tpacpi_is_ibm())
4983                 TPACPI_ACPIHANDLE_INIT(vid2);
4984
4985         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4986                 /* G41, assume IVGA doesn't change */
4987                 vid_handle = vid2_handle;
4988
4989         if (!vid_handle)
4990                 /* video switching not supported on R30, R31 */
4991                 video_supported = TPACPI_VIDEO_NONE;
4992         else if (tpacpi_is_ibm() &&
4993                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4994                 /* 570 */
4995                 video_supported = TPACPI_VIDEO_570;
4996         else if (tpacpi_is_ibm() &&
4997                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4998                 /* 600e/x, 770e, 770x */
4999                 video_supported = TPACPI_VIDEO_770;
5000         else
5001                 /* all others */
5002                 video_supported = TPACPI_VIDEO_NEW;
5003
5004         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
5005                 str_supported(video_supported != TPACPI_VIDEO_NONE),
5006                 video_supported);
5007
5008         return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
5009 }
5010
5011 static void video_exit(void)
5012 {
5013         dbg_printk(TPACPI_DBG_EXIT,
5014                    "restoring original video autoswitch mode\n");
5015         if (video_autosw_set(video_orig_autosw))
5016                 pr_err("error while trying to restore original video autoswitch mode\n");
5017 }
5018
5019 static int video_outputsw_get(void)
5020 {
5021         int status = 0;
5022         int i;
5023
5024         switch (video_supported) {
5025         case TPACPI_VIDEO_570:
5026                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5027                                  TP_ACPI_VIDEO_570_PHSCMD))
5028                         return -EIO;
5029                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
5030                 break;
5031         case TPACPI_VIDEO_770:
5032                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5033                         return -EIO;
5034                 if (i)
5035                         status |= TP_ACPI_VIDEO_S_LCD;
5036                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5037                         return -EIO;
5038                 if (i)
5039                         status |= TP_ACPI_VIDEO_S_CRT;
5040                 break;
5041         case TPACPI_VIDEO_NEW:
5042                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5043                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5044                         return -EIO;
5045                 if (i)
5046                         status |= TP_ACPI_VIDEO_S_CRT;
5047
5048                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5049                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5050                         return -EIO;
5051                 if (i)
5052                         status |= TP_ACPI_VIDEO_S_LCD;
5053                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5054                         return -EIO;
5055                 if (i)
5056                         status |= TP_ACPI_VIDEO_S_DVI;
5057                 break;
5058         default:
5059                 return -ENOSYS;
5060         }
5061
5062         return status;
5063 }
5064
5065 static int video_outputsw_set(int status)
5066 {
5067         int autosw;
5068         int res = 0;
5069
5070         switch (video_supported) {
5071         case TPACPI_VIDEO_570:
5072                 res = acpi_evalf(NULL, NULL,
5073                                  "\\_SB.PHS2", "vdd",
5074                                  TP_ACPI_VIDEO_570_PHS2CMD,
5075                                  status | TP_ACPI_VIDEO_570_PHS2SET);
5076                 break;
5077         case TPACPI_VIDEO_770:
5078                 autosw = video_autosw_get();
5079                 if (autosw < 0)
5080                         return autosw;
5081
5082                 res = video_autosw_set(1);
5083                 if (res)
5084                         return res;
5085                 res = acpi_evalf(vid_handle, NULL,
5086                                  "ASWT", "vdd", status * 0x100, 0);
5087                 if (!autosw && video_autosw_set(autosw)) {
5088                         pr_err("video auto-switch left enabled due to error\n");
5089                         return -EIO;
5090                 }
5091                 break;
5092         case TPACPI_VIDEO_NEW:
5093                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5094                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5095                 break;
5096         default:
5097                 return -ENOSYS;
5098         }
5099
5100         return (res) ? 0 : -EIO;
5101 }
5102
5103 static int video_autosw_get(void)
5104 {
5105         int autosw = 0;
5106
5107         switch (video_supported) {
5108         case TPACPI_VIDEO_570:
5109                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5110                         return -EIO;
5111                 break;
5112         case TPACPI_VIDEO_770:
5113         case TPACPI_VIDEO_NEW:
5114                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5115                         return -EIO;
5116                 break;
5117         default:
5118                 return -ENOSYS;
5119         }
5120
5121         return autosw & 1;
5122 }
5123
5124 static int video_autosw_set(int enable)
5125 {
5126         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5127                 return -EIO;
5128         return 0;
5129 }
5130
5131 static int video_outputsw_cycle(void)
5132 {
5133         int autosw = video_autosw_get();
5134         int res;
5135
5136         if (autosw < 0)
5137                 return autosw;
5138
5139         switch (video_supported) {
5140         case TPACPI_VIDEO_570:
5141                 res = video_autosw_set(1);
5142                 if (res)
5143                         return res;
5144                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5145                 break;
5146         case TPACPI_VIDEO_770:
5147         case TPACPI_VIDEO_NEW:
5148                 res = video_autosw_set(1);
5149                 if (res)
5150                         return res;
5151                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5152                 break;
5153         default:
5154                 return -ENOSYS;
5155         }
5156         if (!autosw && video_autosw_set(autosw)) {
5157                 pr_err("video auto-switch left enabled due to error\n");
5158                 return -EIO;
5159         }
5160
5161         return (res) ? 0 : -EIO;
5162 }
5163
5164 static int video_expand_toggle(void)
5165 {
5166         switch (video_supported) {
5167         case TPACPI_VIDEO_570:
5168                 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5169                         0 : -EIO;
5170         case TPACPI_VIDEO_770:
5171                 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5172                         0 : -EIO;
5173         case TPACPI_VIDEO_NEW:
5174                 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5175                         0 : -EIO;
5176         default:
5177                 return -ENOSYS;
5178         }
5179         /* not reached */
5180 }
5181
5182 static int video_read(struct seq_file *m)
5183 {
5184         int status, autosw;
5185
5186         if (video_supported == TPACPI_VIDEO_NONE) {
5187                 seq_printf(m, "status:\t\tnot supported\n");
5188                 return 0;
5189         }
5190
5191         /* Even reads can crash X.org, so... */
5192         if (!capable(CAP_SYS_ADMIN))
5193                 return -EPERM;
5194
5195         status = video_outputsw_get();
5196         if (status < 0)
5197                 return status;
5198
5199         autosw = video_autosw_get();
5200         if (autosw < 0)
5201                 return autosw;
5202
5203         seq_printf(m, "status:\t\tsupported\n");
5204         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
5205         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
5206         if (video_supported == TPACPI_VIDEO_NEW)
5207                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
5208         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
5209         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5210         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5211         if (video_supported == TPACPI_VIDEO_NEW)
5212                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5213         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5214         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5215
5216         return 0;
5217 }
5218
5219 static int video_write(char *buf)
5220 {
5221         char *cmd;
5222         int enable, disable, status;
5223         int res;
5224
5225         if (video_supported == TPACPI_VIDEO_NONE)
5226                 return -ENODEV;
5227
5228         /* Even reads can crash X.org, let alone writes... */
5229         if (!capable(CAP_SYS_ADMIN))
5230                 return -EPERM;
5231
5232         enable = 0;
5233         disable = 0;
5234
5235         while ((cmd = next_cmd(&buf))) {
5236                 if (strlencmp(cmd, "lcd_enable") == 0) {
5237                         enable |= TP_ACPI_VIDEO_S_LCD;
5238                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
5239                         disable |= TP_ACPI_VIDEO_S_LCD;
5240                 } else if (strlencmp(cmd, "crt_enable") == 0) {
5241                         enable |= TP_ACPI_VIDEO_S_CRT;
5242                 } else if (strlencmp(cmd, "crt_disable") == 0) {
5243                         disable |= TP_ACPI_VIDEO_S_CRT;
5244                 } else if (video_supported == TPACPI_VIDEO_NEW &&
5245                            strlencmp(cmd, "dvi_enable") == 0) {
5246                         enable |= TP_ACPI_VIDEO_S_DVI;
5247                 } else if (video_supported == TPACPI_VIDEO_NEW &&
5248                            strlencmp(cmd, "dvi_disable") == 0) {
5249                         disable |= TP_ACPI_VIDEO_S_DVI;
5250                 } else if (strlencmp(cmd, "auto_enable") == 0) {
5251                         res = video_autosw_set(1);
5252                         if (res)
5253                                 return res;
5254                 } else if (strlencmp(cmd, "auto_disable") == 0) {
5255                         res = video_autosw_set(0);
5256                         if (res)
5257                                 return res;
5258                 } else if (strlencmp(cmd, "video_switch") == 0) {
5259                         res = video_outputsw_cycle();
5260                         if (res)
5261                                 return res;
5262                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
5263                         res = video_expand_toggle();
5264                         if (res)
5265                                 return res;
5266                 } else
5267                         return -EINVAL;
5268         }
5269
5270         if (enable || disable) {
5271                 status = video_outputsw_get();
5272                 if (status < 0)
5273                         return status;
5274                 res = video_outputsw_set((status & ~disable) | enable);
5275                 if (res)
5276                         return res;
5277         }
5278
5279         return 0;
5280 }
5281
5282 static struct ibm_struct video_driver_data = {
5283         .name = "video",
5284         .read = video_read,
5285         .write = video_write,
5286         .exit = video_exit,
5287 };
5288
5289 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5290
5291 /*************************************************************************
5292  * Keyboard backlight subdriver
5293  */
5294
5295 static enum led_brightness kbdlight_brightness;
5296 static DEFINE_MUTEX(kbdlight_mutex);
5297
5298 static int kbdlight_set_level(int level)
5299 {
5300         int ret = 0;
5301
5302         if (!hkey_handle)
5303                 return -ENXIO;
5304
5305         mutex_lock(&kbdlight_mutex);
5306
5307         if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5308                 ret = -EIO;
5309         else
5310                 kbdlight_brightness = level;
5311
5312         mutex_unlock(&kbdlight_mutex);
5313
5314         return ret;
5315 }
5316
5317 static int kbdlight_get_level(void)
5318 {
5319         int status = 0;
5320
5321         if (!hkey_handle)
5322                 return -ENXIO;
5323
5324         if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5325                 return -EIO;
5326
5327         if (status < 0)
5328                 return status;
5329
5330         return status & 0x3;
5331 }
5332
5333 static bool kbdlight_is_supported(void)
5334 {
5335         int status = 0;
5336
5337         if (!hkey_handle)
5338                 return false;
5339
5340         if (!acpi_has_method(hkey_handle, "MLCG")) {
5341                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5342                 return false;
5343         }
5344
5345         if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5346                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5347                 return false;
5348         }
5349
5350         if (status < 0) {
5351                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5352                 return false;
5353         }
5354
5355         vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5356         /*
5357          * Guessed test for keyboard backlight:
5358          *
5359          * Machines with backlight keyboard return:
5360          *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5361          *   b110100010010000000XX - ThinkPad x230
5362          *   b010100000010000000XX - ThinkPad x240
5363          *   b010100000010000000XX - ThinkPad W541
5364          * (XX is current backlight level)
5365          *
5366          * Machines without backlight keyboard return:
5367          *   b10100001000000000000 - ThinkPad x230
5368          *   b10110001000000000000 - ThinkPad E430
5369          *   b00000000000000000000 - ThinkPad E450
5370          *
5371          * Candidate BITs for detection test (XOR):
5372          *   b01000000001000000000
5373          *              ^
5374          */
5375         return status & BIT(9);
5376 }
5377
5378 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5379                         enum led_brightness brightness)
5380 {
5381         return kbdlight_set_level(brightness);
5382 }
5383
5384 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5385 {
5386         int level;
5387
5388         level = kbdlight_get_level();
5389         if (level < 0)
5390                 return 0;
5391
5392         return level;
5393 }
5394
5395 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5396         .led_classdev = {
5397                 .name           = "tpacpi::kbd_backlight",
5398                 .max_brightness = 2,
5399                 .flags          = LED_BRIGHT_HW_CHANGED,
5400                 .brightness_set_blocking = &kbdlight_sysfs_set,
5401                 .brightness_get = &kbdlight_sysfs_get,
5402         }
5403 };
5404
5405 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5406 {
5407         int rc;
5408
5409         vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5410
5411         TPACPI_ACPIHANDLE_INIT(hkey);
5412
5413         if (!kbdlight_is_supported()) {
5414                 tp_features.kbdlight = 0;
5415                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5416                 return 1;
5417         }
5418
5419         kbdlight_brightness = kbdlight_sysfs_get(NULL);
5420         tp_features.kbdlight = 1;
5421
5422         rc = led_classdev_register(&tpacpi_pdev->dev,
5423                                    &tpacpi_led_kbdlight.led_classdev);
5424         if (rc < 0) {
5425                 tp_features.kbdlight = 0;
5426                 return rc;
5427         }
5428
5429         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5430                                       TP_ACPI_HKEY_KBD_LIGHT_MASK);
5431         return 0;
5432 }
5433
5434 static void kbdlight_exit(void)
5435 {
5436         if (tp_features.kbdlight)
5437                 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5438 }
5439
5440 static int kbdlight_set_level_and_update(int level)
5441 {
5442         int ret;
5443         struct led_classdev *led_cdev;
5444
5445         ret = kbdlight_set_level(level);
5446         led_cdev = &tpacpi_led_kbdlight.led_classdev;
5447
5448         if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5449                 led_cdev->brightness = level;
5450
5451         return ret;
5452 }
5453
5454 static int kbdlight_read(struct seq_file *m)
5455 {
5456         int level;
5457
5458         if (!tp_features.kbdlight) {
5459                 seq_printf(m, "status:\t\tnot supported\n");
5460         } else {
5461                 level = kbdlight_get_level();
5462                 if (level < 0)
5463                         seq_printf(m, "status:\t\terror %d\n", level);
5464                 else
5465                         seq_printf(m, "status:\t\t%d\n", level);
5466                 seq_printf(m, "commands:\t0, 1, 2\n");
5467         }
5468
5469         return 0;
5470 }
5471
5472 static int kbdlight_write(char *buf)
5473 {
5474         char *cmd;
5475         int level = -1;
5476
5477         if (!tp_features.kbdlight)
5478                 return -ENODEV;
5479
5480         while ((cmd = next_cmd(&buf))) {
5481                 if (strlencmp(cmd, "0") == 0)
5482                         level = 0;
5483                 else if (strlencmp(cmd, "1") == 0)
5484                         level = 1;
5485                 else if (strlencmp(cmd, "2") == 0)
5486                         level = 2;
5487                 else
5488                         return -EINVAL;
5489         }
5490
5491         if (level == -1)
5492                 return -EINVAL;
5493
5494         return kbdlight_set_level_and_update(level);
5495 }
5496
5497 static void kbdlight_suspend(void)
5498 {
5499         struct led_classdev *led_cdev;
5500
5501         if (!tp_features.kbdlight)
5502                 return;
5503
5504         led_cdev = &tpacpi_led_kbdlight.led_classdev;
5505         led_update_brightness(led_cdev);
5506         led_classdev_suspend(led_cdev);
5507 }
5508
5509 static void kbdlight_resume(void)
5510 {
5511         if (!tp_features.kbdlight)
5512                 return;
5513
5514         led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5515 }
5516
5517 static struct ibm_struct kbdlight_driver_data = {
5518         .name = "kbdlight",
5519         .read = kbdlight_read,
5520         .write = kbdlight_write,
5521         .suspend = kbdlight_suspend,
5522         .resume = kbdlight_resume,
5523         .exit = kbdlight_exit,
5524 };
5525
5526 /*************************************************************************
5527  * Light (thinklight) subdriver
5528  */
5529
5530 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
5531 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
5532
5533 static int light_get_status(void)
5534 {
5535         int status = 0;
5536
5537         if (tp_features.light_status) {
5538                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5539                         return -EIO;
5540                 return (!!status);
5541         }
5542
5543         return -ENXIO;
5544 }
5545
5546 static int light_set_status(int status)
5547 {
5548         int rc;
5549
5550         if (tp_features.light) {
5551                 if (cmos_handle) {
5552                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5553                                         (status) ?
5554                                                 TP_CMOS_THINKLIGHT_ON :
5555                                                 TP_CMOS_THINKLIGHT_OFF);
5556                 } else {
5557                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5558                                         (status) ? 1 : 0);
5559                 }
5560                 return (rc) ? 0 : -EIO;
5561         }
5562
5563         return -ENXIO;
5564 }
5565
5566 static int light_sysfs_set(struct led_classdev *led_cdev,
5567                         enum led_brightness brightness)
5568 {
5569         return light_set_status((brightness != LED_OFF) ?
5570                                 TPACPI_LED_ON : TPACPI_LED_OFF);
5571 }
5572
5573 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5574 {
5575         return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5576 }
5577
5578 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5579         .led_classdev = {
5580                 .name           = "tpacpi::thinklight",
5581                 .brightness_set_blocking = &light_sysfs_set,
5582                 .brightness_get = &light_sysfs_get,
5583         }
5584 };
5585
5586 static int __init light_init(struct ibm_init_struct *iibm)
5587 {
5588         int rc;
5589
5590         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5591
5592         if (tpacpi_is_ibm()) {
5593                 TPACPI_ACPIHANDLE_INIT(ledb);
5594                 TPACPI_ACPIHANDLE_INIT(lght);
5595         }
5596         TPACPI_ACPIHANDLE_INIT(cmos);
5597
5598         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5599         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5600
5601         if (tp_features.light)
5602                 /* light status not supported on
5603                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5604                 tp_features.light_status =
5605                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5606
5607         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5608                 str_supported(tp_features.light),
5609                 str_supported(tp_features.light_status));
5610
5611         if (!tp_features.light)
5612                 return 1;
5613
5614         rc = led_classdev_register(&tpacpi_pdev->dev,
5615                                    &tpacpi_led_thinklight.led_classdev);
5616
5617         if (rc < 0) {
5618                 tp_features.light = 0;
5619                 tp_features.light_status = 0;
5620         } else  {
5621                 rc = 0;
5622         }
5623
5624         return rc;
5625 }
5626
5627 static void light_exit(void)
5628 {
5629         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5630 }
5631
5632 static int light_read(struct seq_file *m)
5633 {
5634         int status;
5635
5636         if (!tp_features.light) {
5637                 seq_printf(m, "status:\t\tnot supported\n");
5638         } else if (!tp_features.light_status) {
5639                 seq_printf(m, "status:\t\tunknown\n");
5640                 seq_printf(m, "commands:\ton, off\n");
5641         } else {
5642                 status = light_get_status();
5643                 if (status < 0)
5644                         return status;
5645                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5646                 seq_printf(m, "commands:\ton, off\n");
5647         }
5648
5649         return 0;
5650 }
5651
5652 static int light_write(char *buf)
5653 {
5654         char *cmd;
5655         int newstatus = 0;
5656
5657         if (!tp_features.light)
5658                 return -ENODEV;
5659
5660         while ((cmd = next_cmd(&buf))) {
5661                 if (strlencmp(cmd, "on") == 0) {
5662                         newstatus = 1;
5663                 } else if (strlencmp(cmd, "off") == 0) {
5664                         newstatus = 0;
5665                 } else
5666                         return -EINVAL;
5667         }
5668
5669         return light_set_status(newstatus);
5670 }
5671
5672 static struct ibm_struct light_driver_data = {
5673         .name = "light",
5674         .read = light_read,
5675         .write = light_write,
5676         .exit = light_exit,
5677 };
5678
5679 /*************************************************************************
5680  * CMOS subdriver
5681  */
5682
5683 /* sysfs cmos_command -------------------------------------------------- */
5684 static ssize_t cmos_command_store(struct device *dev,
5685                             struct device_attribute *attr,
5686                             const char *buf, size_t count)
5687 {
5688         unsigned long cmos_cmd;
5689         int res;
5690
5691         if (parse_strtoul(buf, 21, &cmos_cmd))
5692                 return -EINVAL;
5693
5694         res = issue_thinkpad_cmos_command(cmos_cmd);
5695         return (res) ? res : count;
5696 }
5697
5698 static DEVICE_ATTR_WO(cmos_command);
5699
5700 /* --------------------------------------------------------------------- */
5701
5702 static int __init cmos_init(struct ibm_init_struct *iibm)
5703 {
5704         int res;
5705
5706         vdbg_printk(TPACPI_DBG_INIT,
5707                 "initializing cmos commands subdriver\n");
5708
5709         TPACPI_ACPIHANDLE_INIT(cmos);
5710
5711         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5712                 str_supported(cmos_handle != NULL));
5713
5714         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5715         if (res)
5716                 return res;
5717
5718         return (cmos_handle) ? 0 : 1;
5719 }
5720
5721 static void cmos_exit(void)
5722 {
5723         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5724 }
5725
5726 static int cmos_read(struct seq_file *m)
5727 {
5728         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5729            R30, R31, T20-22, X20-21 */
5730         if (!cmos_handle)
5731                 seq_printf(m, "status:\t\tnot supported\n");
5732         else {
5733                 seq_printf(m, "status:\t\tsupported\n");
5734                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5735         }
5736
5737         return 0;
5738 }
5739
5740 static int cmos_write(char *buf)
5741 {
5742         char *cmd;
5743         int cmos_cmd, res;
5744
5745         while ((cmd = next_cmd(&buf))) {
5746                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5747                     cmos_cmd >= 0 && cmos_cmd <= 21) {
5748                         /* cmos_cmd set */
5749                 } else
5750                         return -EINVAL;
5751
5752                 res = issue_thinkpad_cmos_command(cmos_cmd);
5753                 if (res)
5754                         return res;
5755         }
5756
5757         return 0;
5758 }
5759
5760 static struct ibm_struct cmos_driver_data = {
5761         .name = "cmos",
5762         .read = cmos_read,
5763         .write = cmos_write,
5764         .exit = cmos_exit,
5765 };
5766
5767 /*************************************************************************
5768  * LED subdriver
5769  */
5770
5771 enum led_access_mode {
5772         TPACPI_LED_NONE = 0,
5773         TPACPI_LED_570, /* 570 */
5774         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5775         TPACPI_LED_NEW, /* all others */
5776 };
5777
5778 enum {  /* For TPACPI_LED_OLD */
5779         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5780         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5781         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5782 };
5783
5784 static enum led_access_mode led_supported;
5785
5786 static acpi_handle led_handle;
5787
5788 #define TPACPI_LED_NUMLEDS 16
5789 static struct tpacpi_led_classdev *tpacpi_leds;
5790 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5791 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5792         /* there's a limit of 19 chars + NULL before 2.6.26 */
5793         "tpacpi::power",
5794         "tpacpi:orange:batt",
5795         "tpacpi:green:batt",
5796         "tpacpi::dock_active",
5797         "tpacpi::bay_active",
5798         "tpacpi::dock_batt",
5799         "tpacpi::unknown_led",
5800         "tpacpi::standby",
5801         "tpacpi::dock_status1",
5802         "tpacpi::dock_status2",
5803         "tpacpi::unknown_led2",
5804         "tpacpi::unknown_led3",
5805         "tpacpi::thinkvantage",
5806 };
5807 #define TPACPI_SAFE_LEDS        0x1081U
5808
5809 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5810 {
5811 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5812         return false;
5813 #else
5814         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5815 #endif
5816 }
5817
5818 static int led_get_status(const unsigned int led)
5819 {
5820         int status;
5821         enum led_status_t led_s;
5822
5823         switch (led_supported) {
5824         case TPACPI_LED_570:
5825                 if (!acpi_evalf(ec_handle,
5826                                 &status, "GLED", "dd", 1 << led))
5827                         return -EIO;
5828                 led_s = (status == 0) ?
5829                                 TPACPI_LED_OFF :
5830                                 ((status == 1) ?
5831                                         TPACPI_LED_ON :
5832                                         TPACPI_LED_BLINK);
5833                 tpacpi_led_state_cache[led] = led_s;
5834                 return led_s;
5835         default:
5836                 return -ENXIO;
5837         }
5838
5839         /* not reached */
5840 }
5841
5842 static int led_set_status(const unsigned int led,
5843                           const enum led_status_t ledstatus)
5844 {
5845         /* off, on, blink. Index is led_status_t */
5846         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5847         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5848
5849         int rc = 0;
5850
5851         switch (led_supported) {
5852         case TPACPI_LED_570:
5853                 /* 570 */
5854                 if (unlikely(led > 7))
5855                         return -EINVAL;
5856                 if (unlikely(tpacpi_is_led_restricted(led)))
5857                         return -EPERM;
5858                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5859                                 (1 << led), led_sled_arg1[ledstatus]))
5860                         return -EIO;
5861                 break;
5862         case TPACPI_LED_OLD:
5863                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5864                 if (unlikely(led > 7))
5865                         return -EINVAL;
5866                 if (unlikely(tpacpi_is_led_restricted(led)))
5867                         return -EPERM;
5868                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5869                 if (rc >= 0)
5870                         rc = ec_write(TPACPI_LED_EC_HLBL,
5871                                       (ledstatus == TPACPI_LED_BLINK) << led);
5872                 if (rc >= 0)
5873                         rc = ec_write(TPACPI_LED_EC_HLCL,
5874                                       (ledstatus != TPACPI_LED_OFF) << led);
5875                 break;
5876         case TPACPI_LED_NEW:
5877                 /* all others */
5878                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5879                         return -EINVAL;
5880                 if (unlikely(tpacpi_is_led_restricted(led)))
5881                         return -EPERM;
5882                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5883                                 led, led_led_arg1[ledstatus]))
5884                         return -EIO;
5885                 break;
5886         default:
5887                 return -ENXIO;
5888         }
5889
5890         if (!rc)
5891                 tpacpi_led_state_cache[led] = ledstatus;
5892
5893         return rc;
5894 }
5895
5896 static int led_sysfs_set(struct led_classdev *led_cdev,
5897                         enum led_brightness brightness)
5898 {
5899         struct tpacpi_led_classdev *data = container_of(led_cdev,
5900                              struct tpacpi_led_classdev, led_classdev);
5901         enum led_status_t new_state;
5902
5903         if (brightness == LED_OFF)
5904                 new_state = TPACPI_LED_OFF;
5905         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5906                 new_state = TPACPI_LED_ON;
5907         else
5908                 new_state = TPACPI_LED_BLINK;
5909
5910         return led_set_status(data->led, new_state);
5911 }
5912
5913 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5914                         unsigned long *delay_on, unsigned long *delay_off)
5915 {
5916         struct tpacpi_led_classdev *data = container_of(led_cdev,
5917                              struct tpacpi_led_classdev, led_classdev);
5918
5919         /* Can we choose the flash rate? */
5920         if (*delay_on == 0 && *delay_off == 0) {
5921                 /* yes. set them to the hardware blink rate (1 Hz) */
5922                 *delay_on = 500; /* ms */
5923                 *delay_off = 500; /* ms */
5924         } else if ((*delay_on != 500) || (*delay_off != 500))
5925                 return -EINVAL;
5926
5927         return led_set_status(data->led, TPACPI_LED_BLINK);
5928 }
5929
5930 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5931 {
5932         int rc;
5933
5934         struct tpacpi_led_classdev *data = container_of(led_cdev,
5935                              struct tpacpi_led_classdev, led_classdev);
5936
5937         rc = led_get_status(data->led);
5938
5939         if (rc == TPACPI_LED_OFF || rc < 0)
5940                 rc = LED_OFF;   /* no error handling in led class :( */
5941         else
5942                 rc = LED_FULL;
5943
5944         return rc;
5945 }
5946
5947 static void led_exit(void)
5948 {
5949         unsigned int i;
5950
5951         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5952                 if (tpacpi_leds[i].led_classdev.name)
5953                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5954         }
5955
5956         kfree(tpacpi_leds);
5957 }
5958
5959 static int __init tpacpi_init_led(unsigned int led)
5960 {
5961         int rc;
5962
5963         tpacpi_leds[led].led = led;
5964
5965         /* LEDs with no name don't get registered */
5966         if (!tpacpi_led_names[led])
5967                 return 0;
5968
5969         tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5970         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5971         if (led_supported == TPACPI_LED_570)
5972                 tpacpi_leds[led].led_classdev.brightness_get =
5973                                                 &led_sysfs_get;
5974
5975         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5976
5977         rc = led_classdev_register(&tpacpi_pdev->dev,
5978                                 &tpacpi_leds[led].led_classdev);
5979         if (rc < 0)
5980                 tpacpi_leds[led].led_classdev.name = NULL;
5981
5982         return rc;
5983 }
5984
5985 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5986         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5987         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5988         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5989
5990         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5991         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5992         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5993         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5994         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5995         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5996         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5997         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5998
5999         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
6000         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
6001         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
6002         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
6003         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
6004
6005         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
6006         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
6007         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
6008         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
6009
6010         /* (1) - may have excess leds enabled on MSB */
6011
6012         /* Defaults (order matters, keep last, don't reorder!) */
6013         { /* Lenovo */
6014           .vendor = PCI_VENDOR_ID_LENOVO,
6015           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6016           .quirks = 0x1fffU,
6017         },
6018         { /* IBM ThinkPads with no EC version string */
6019           .vendor = PCI_VENDOR_ID_IBM,
6020           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6021           .quirks = 0x00ffU,
6022         },
6023         { /* IBM ThinkPads with EC version string */
6024           .vendor = PCI_VENDOR_ID_IBM,
6025           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6026           .quirks = 0x00bfU,
6027         },
6028 };
6029
6030 static enum led_access_mode __init led_init_detect_mode(void)
6031 {
6032         acpi_status status;
6033
6034         if (tpacpi_is_ibm()) {
6035                 /* 570 */
6036                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6037                 if (ACPI_SUCCESS(status))
6038                         return TPACPI_LED_570;
6039
6040                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6041                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6042                 if (ACPI_SUCCESS(status))
6043                         return TPACPI_LED_OLD;
6044         }
6045
6046         /* most others */
6047         status = acpi_get_handle(ec_handle, "LED", &led_handle);
6048         if (ACPI_SUCCESS(status))
6049                 return TPACPI_LED_NEW;
6050
6051         /* R30, R31, and unknown firmwares */
6052         led_handle = NULL;
6053         return TPACPI_LED_NONE;
6054 }
6055
6056 static int __init led_init(struct ibm_init_struct *iibm)
6057 {
6058         unsigned int i;
6059         int rc;
6060         unsigned long useful_leds;
6061
6062         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6063
6064         led_supported = led_init_detect_mode();
6065
6066         if (led_supported != TPACPI_LED_NONE) {
6067                 useful_leds = tpacpi_check_quirks(led_useful_qtable,
6068                                 ARRAY_SIZE(led_useful_qtable));
6069
6070                 if (!useful_leds) {
6071                         led_handle = NULL;
6072                         led_supported = TPACPI_LED_NONE;
6073                 }
6074         }
6075
6076         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6077                 str_supported(led_supported), led_supported);
6078
6079         if (led_supported == TPACPI_LED_NONE)
6080                 return 1;
6081
6082         tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6083                               GFP_KERNEL);
6084         if (!tpacpi_leds) {
6085                 pr_err("Out of memory for LED data\n");
6086                 return -ENOMEM;
6087         }
6088
6089         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6090                 tpacpi_leds[i].led = -1;
6091
6092                 if (!tpacpi_is_led_restricted(i) &&
6093                     test_bit(i, &useful_leds)) {
6094                         rc = tpacpi_init_led(i);
6095                         if (rc < 0) {
6096                                 led_exit();
6097                                 return rc;
6098                         }
6099                 }
6100         }
6101
6102 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6103         pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6104 #endif
6105         return 0;
6106 }
6107
6108 #define str_led_status(s) \
6109         ((s) == TPACPI_LED_OFF ? "off" : \
6110                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
6111
6112 static int led_read(struct seq_file *m)
6113 {
6114         if (!led_supported) {
6115                 seq_printf(m, "status:\t\tnot supported\n");
6116                 return 0;
6117         }
6118         seq_printf(m, "status:\t\tsupported\n");
6119
6120         if (led_supported == TPACPI_LED_570) {
6121                 /* 570 */
6122                 int i, status;
6123                 for (i = 0; i < 8; i++) {
6124                         status = led_get_status(i);
6125                         if (status < 0)
6126                                 return -EIO;
6127                         seq_printf(m, "%d:\t\t%s\n",
6128                                        i, str_led_status(status));
6129                 }
6130         }
6131
6132         seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6133
6134         return 0;
6135 }
6136
6137 static int led_write(char *buf)
6138 {
6139         char *cmd;
6140         int led, rc;
6141         enum led_status_t s;
6142
6143         if (!led_supported)
6144                 return -ENODEV;
6145
6146         while ((cmd = next_cmd(&buf))) {
6147                 if (sscanf(cmd, "%d", &led) != 1)
6148                         return -EINVAL;
6149
6150                 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
6151                                 tpacpi_leds[led].led < 0)
6152                         return -ENODEV;
6153
6154                 if (strstr(cmd, "off")) {
6155                         s = TPACPI_LED_OFF;
6156                 } else if (strstr(cmd, "on")) {
6157                         s = TPACPI_LED_ON;
6158                 } else if (strstr(cmd, "blink")) {
6159                         s = TPACPI_LED_BLINK;
6160                 } else {
6161                         return -EINVAL;
6162                 }
6163
6164                 rc = led_set_status(led, s);
6165                 if (rc < 0)
6166                         return rc;
6167         }
6168
6169         return 0;
6170 }
6171
6172 static struct ibm_struct led_driver_data = {
6173         .name = "led",
6174         .read = led_read,
6175         .write = led_write,
6176         .exit = led_exit,
6177 };
6178
6179 /*************************************************************************
6180  * Beep subdriver
6181  */
6182
6183 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
6184
6185 #define TPACPI_BEEP_Q1 0x0001
6186
6187 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6188         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6189         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6190 };
6191
6192 static int __init beep_init(struct ibm_init_struct *iibm)
6193 {
6194         unsigned long quirks;
6195
6196         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6197
6198         TPACPI_ACPIHANDLE_INIT(beep);
6199
6200         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6201                 str_supported(beep_handle != NULL));
6202
6203         quirks = tpacpi_check_quirks(beep_quirk_table,
6204                                      ARRAY_SIZE(beep_quirk_table));
6205
6206         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6207
6208         return (beep_handle) ? 0 : 1;
6209 }
6210
6211 static int beep_read(struct seq_file *m)
6212 {
6213         if (!beep_handle)
6214                 seq_printf(m, "status:\t\tnot supported\n");
6215         else {
6216                 seq_printf(m, "status:\t\tsupported\n");
6217                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6218         }
6219
6220         return 0;
6221 }
6222
6223 static int beep_write(char *buf)
6224 {
6225         char *cmd;
6226         int beep_cmd;
6227
6228         if (!beep_handle)
6229                 return -ENODEV;
6230
6231         while ((cmd = next_cmd(&buf))) {
6232                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6233                     beep_cmd >= 0 && beep_cmd <= 17) {
6234                         /* beep_cmd set */
6235                 } else
6236                         return -EINVAL;
6237                 if (tp_features.beep_needs_two_args) {
6238                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6239                                         beep_cmd, 0))
6240                                 return -EIO;
6241                 } else {
6242                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6243                                         beep_cmd))
6244                                 return -EIO;
6245                 }
6246         }
6247
6248         return 0;
6249 }
6250
6251 static struct ibm_struct beep_driver_data = {
6252         .name = "beep",
6253         .read = beep_read,
6254         .write = beep_write,
6255 };
6256
6257 /*************************************************************************
6258  * Thermal subdriver
6259  */
6260
6261 enum thermal_access_mode {
6262         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
6263         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
6264         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
6265         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
6266         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
6267 };
6268
6269 enum { /* TPACPI_THERMAL_TPEC_* */
6270         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
6271         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
6272         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
6273
6274         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6275 };
6276
6277
6278 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
6279 struct ibm_thermal_sensors_struct {
6280         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6281 };
6282
6283 static enum thermal_access_mode thermal_read_mode;
6284
6285 /* idx is zero-based */
6286 static int thermal_get_sensor(int idx, s32 *value)
6287 {
6288         int t;
6289         s8 tmp;
6290         char tmpi[5];
6291
6292         t = TP_EC_THERMAL_TMP0;
6293
6294         switch (thermal_read_mode) {
6295 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6296         case TPACPI_THERMAL_TPEC_16:
6297                 if (idx >= 8 && idx <= 15) {
6298                         t = TP_EC_THERMAL_TMP8;
6299                         idx -= 8;
6300                 }
6301 #endif
6302                 /* fallthrough */
6303         case TPACPI_THERMAL_TPEC_8:
6304                 if (idx <= 7) {
6305                         if (!acpi_ec_read(t + idx, &tmp))
6306                                 return -EIO;
6307                         *value = tmp * 1000;
6308                         return 0;
6309                 }
6310                 break;
6311
6312         case TPACPI_THERMAL_ACPI_UPDT:
6313                 if (idx <= 7) {
6314                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6315                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6316                                 return -EIO;
6317                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6318                                 return -EIO;
6319                         *value = (t - 2732) * 100;
6320                         return 0;
6321                 }
6322                 break;
6323
6324         case TPACPI_THERMAL_ACPI_TMP07:
6325                 if (idx <= 7) {
6326                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6327                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6328                                 return -EIO;
6329                         if (t > 127 || t < -127)
6330                                 t = TP_EC_THERMAL_TMP_NA;
6331                         *value = t * 1000;
6332                         return 0;
6333                 }
6334                 break;
6335
6336         case TPACPI_THERMAL_NONE:
6337         default:
6338                 return -ENOSYS;
6339         }
6340
6341         return -EINVAL;
6342 }
6343
6344 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6345 {
6346         int res, i;
6347         int n;
6348
6349         n = 8;
6350         i = 0;
6351
6352         if (!s)
6353                 return -EINVAL;
6354
6355         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6356                 n = 16;
6357
6358         for (i = 0 ; i < n; i++) {
6359                 res = thermal_get_sensor(i, &s->temp[i]);
6360                 if (res)
6361                         return res;
6362         }
6363
6364         return n;
6365 }
6366
6367 static void thermal_dump_all_sensors(void)
6368 {
6369         int n, i;
6370         struct ibm_thermal_sensors_struct t;
6371
6372         n = thermal_get_sensors(&t);
6373         if (n <= 0)
6374                 return;
6375
6376         pr_notice("temperatures (Celsius):");
6377
6378         for (i = 0; i < n; i++) {
6379                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6380                         pr_cont(" %d", (int)(t.temp[i] / 1000));
6381                 else
6382                         pr_cont(" N/A");
6383         }
6384
6385         pr_cont("\n");
6386 }
6387
6388 /* sysfs temp##_input -------------------------------------------------- */
6389
6390 static ssize_t thermal_temp_input_show(struct device *dev,
6391                            struct device_attribute *attr,
6392                            char *buf)
6393 {
6394         struct sensor_device_attribute *sensor_attr =
6395                                         to_sensor_dev_attr(attr);
6396         int idx = sensor_attr->index;
6397         s32 value;
6398         int res;
6399
6400         res = thermal_get_sensor(idx, &value);
6401         if (res)
6402                 return res;
6403         if (value == TPACPI_THERMAL_SENSOR_NA)
6404                 return -ENXIO;
6405
6406         return snprintf(buf, PAGE_SIZE, "%d\n", value);
6407 }
6408
6409 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6410          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6411                      thermal_temp_input_show, NULL, _idxB)
6412
6413 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6414         THERMAL_SENSOR_ATTR_TEMP(1, 0),
6415         THERMAL_SENSOR_ATTR_TEMP(2, 1),
6416         THERMAL_SENSOR_ATTR_TEMP(3, 2),
6417         THERMAL_SENSOR_ATTR_TEMP(4, 3),
6418         THERMAL_SENSOR_ATTR_TEMP(5, 4),
6419         THERMAL_SENSOR_ATTR_TEMP(6, 5),
6420         THERMAL_SENSOR_ATTR_TEMP(7, 6),
6421         THERMAL_SENSOR_ATTR_TEMP(8, 7),
6422         THERMAL_SENSOR_ATTR_TEMP(9, 8),
6423         THERMAL_SENSOR_ATTR_TEMP(10, 9),
6424         THERMAL_SENSOR_ATTR_TEMP(11, 10),
6425         THERMAL_SENSOR_ATTR_TEMP(12, 11),
6426         THERMAL_SENSOR_ATTR_TEMP(13, 12),
6427         THERMAL_SENSOR_ATTR_TEMP(14, 13),
6428         THERMAL_SENSOR_ATTR_TEMP(15, 14),
6429         THERMAL_SENSOR_ATTR_TEMP(16, 15),
6430 };
6431
6432 #define THERMAL_ATTRS(X) \
6433         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6434
6435 static struct attribute *thermal_temp_input_attr[] = {
6436         THERMAL_ATTRS(8),
6437         THERMAL_ATTRS(9),
6438         THERMAL_ATTRS(10),
6439         THERMAL_ATTRS(11),
6440         THERMAL_ATTRS(12),
6441         THERMAL_ATTRS(13),
6442         THERMAL_ATTRS(14),
6443         THERMAL_ATTRS(15),
6444         THERMAL_ATTRS(0),
6445         THERMAL_ATTRS(1),
6446         THERMAL_ATTRS(2),
6447         THERMAL_ATTRS(3),
6448         THERMAL_ATTRS(4),
6449         THERMAL_ATTRS(5),
6450         THERMAL_ATTRS(6),
6451         THERMAL_ATTRS(7),
6452         NULL
6453 };
6454
6455 static const struct attribute_group thermal_temp_input16_group = {
6456         .attrs = thermal_temp_input_attr
6457 };
6458
6459 static const struct attribute_group thermal_temp_input8_group = {
6460         .attrs = &thermal_temp_input_attr[8]
6461 };
6462
6463 #undef THERMAL_SENSOR_ATTR_TEMP
6464 #undef THERMAL_ATTRS
6465
6466 /* --------------------------------------------------------------------- */
6467
6468 static int __init thermal_init(struct ibm_init_struct *iibm)
6469 {
6470         u8 t, ta1, ta2;
6471         int i;
6472         int acpi_tmp7;
6473         int res;
6474
6475         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6476
6477         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6478
6479         if (thinkpad_id.ec_model) {
6480                 /*
6481                  * Direct EC access mode: sensors at registers
6482                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6483                  * non-implemented, thermal sensors return 0x80 when
6484                  * not available
6485                  */
6486
6487                 ta1 = ta2 = 0;
6488                 for (i = 0; i < 8; i++) {
6489                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6490                                 ta1 |= t;
6491                         } else {
6492                                 ta1 = 0;
6493                                 break;
6494                         }
6495                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6496                                 ta2 |= t;
6497                         } else {
6498                                 ta1 = 0;
6499                                 break;
6500                         }
6501                 }
6502                 if (ta1 == 0) {
6503                         /* This is sheer paranoia, but we handle it anyway */
6504                         if (acpi_tmp7) {
6505                                 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6506                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6507                         } else {
6508                                 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6509                                 thermal_read_mode = TPACPI_THERMAL_NONE;
6510                         }
6511                 } else {
6512                         thermal_read_mode =
6513                             (ta2 != 0) ?
6514                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6515                 }
6516         } else if (acpi_tmp7) {
6517                 if (tpacpi_is_ibm() &&
6518                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6519                         /* 600e/x, 770e, 770x */
6520                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6521                 } else {
6522                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6523                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6524                 }
6525         } else {
6526                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6527                 thermal_read_mode = TPACPI_THERMAL_NONE;
6528         }
6529
6530         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6531                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6532                 thermal_read_mode);
6533
6534         switch (thermal_read_mode) {
6535         case TPACPI_THERMAL_TPEC_16:
6536                 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6537                                 &thermal_temp_input16_group);
6538                 if (res)
6539                         return res;
6540                 break;
6541         case TPACPI_THERMAL_TPEC_8:
6542         case TPACPI_THERMAL_ACPI_TMP07:
6543         case TPACPI_THERMAL_ACPI_UPDT:
6544                 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6545                                 &thermal_temp_input8_group);
6546                 if (res)
6547                         return res;
6548                 break;
6549         case TPACPI_THERMAL_NONE:
6550         default:
6551                 return 1;
6552         }
6553
6554         return 0;
6555 }
6556
6557 static void thermal_exit(void)
6558 {
6559         switch (thermal_read_mode) {
6560         case TPACPI_THERMAL_TPEC_16:
6561                 sysfs_remove_group(&tpacpi_hwmon->kobj,
6562                                    &thermal_temp_input16_group);
6563                 break;
6564         case TPACPI_THERMAL_TPEC_8:
6565         case TPACPI_THERMAL_ACPI_TMP07:
6566         case TPACPI_THERMAL_ACPI_UPDT:
6567                 sysfs_remove_group(&tpacpi_hwmon->kobj,
6568                                    &thermal_temp_input8_group);
6569                 break;
6570         case TPACPI_THERMAL_NONE:
6571         default:
6572                 break;
6573         }
6574 }
6575
6576 static int thermal_read(struct seq_file *m)
6577 {
6578         int n, i;
6579         struct ibm_thermal_sensors_struct t;
6580
6581         n = thermal_get_sensors(&t);
6582         if (unlikely(n < 0))
6583                 return n;
6584
6585         seq_printf(m, "temperatures:\t");
6586
6587         if (n > 0) {
6588                 for (i = 0; i < (n - 1); i++)
6589                         seq_printf(m, "%d ", t.temp[i] / 1000);
6590                 seq_printf(m, "%d\n", t.temp[i] / 1000);
6591         } else
6592                 seq_printf(m, "not supported\n");
6593
6594         return 0;
6595 }
6596
6597 static struct ibm_struct thermal_driver_data = {
6598         .name = "thermal",
6599         .read = thermal_read,
6600         .exit = thermal_exit,
6601 };
6602
6603 /*************************************************************************
6604  * Backlight/brightness subdriver
6605  */
6606
6607 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6608
6609 /*
6610  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6611  * CMOS NVRAM byte 0x5E, bits 0-3.
6612  *
6613  * EC HBRV (0x31) has the following layout
6614  *   Bit 7: unknown function
6615  *   Bit 6: unknown function
6616  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6617  *   Bit 4: must be set to zero to avoid problems
6618  *   Bit 3-0: backlight brightness level
6619  *
6620  * brightness_get_raw returns status data in the HBRV layout
6621  *
6622  * WARNING: The X61 has been verified to use HBRV for something else, so
6623  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6624  * testing on the very early *60 Lenovo models...
6625  */
6626
6627 enum {
6628         TP_EC_BACKLIGHT = 0x31,
6629
6630         /* TP_EC_BACKLIGHT bitmasks */
6631         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6632         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6633         TP_EC_BACKLIGHT_MAPSW = 0x20,
6634 };
6635
6636 enum tpacpi_brightness_access_mode {
6637         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
6638         TPACPI_BRGHT_MODE_EC,           /* EC control */
6639         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
6640         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
6641         TPACPI_BRGHT_MODE_MAX
6642 };
6643
6644 static struct backlight_device *ibm_backlight_device;
6645
6646 static enum tpacpi_brightness_access_mode brightness_mode =
6647                 TPACPI_BRGHT_MODE_MAX;
6648
6649 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6650
6651 static struct mutex brightness_mutex;
6652
6653 /* NVRAM brightness access,
6654  * call with brightness_mutex held! */
6655 static unsigned int tpacpi_brightness_nvram_get(void)
6656 {
6657         u8 lnvram;
6658
6659         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6660                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6661                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6662         lnvram &= bright_maxlvl;
6663
6664         return lnvram;
6665 }
6666
6667 static void tpacpi_brightness_checkpoint_nvram(void)
6668 {
6669         u8 lec = 0;
6670         u8 b_nvram;
6671
6672         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6673                 return;
6674
6675         vdbg_printk(TPACPI_DBG_BRGHT,
6676                 "trying to checkpoint backlight level to NVRAM...\n");
6677
6678         if (mutex_lock_killable(&brightness_mutex) < 0)
6679                 return;
6680
6681         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6682                 goto unlock;
6683         lec &= TP_EC_BACKLIGHT_LVLMSK;
6684         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6685
6686         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6687                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6688                 /* NVRAM needs update */
6689                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6690                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6691                 b_nvram |= lec;
6692                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6693                 dbg_printk(TPACPI_DBG_BRGHT,
6694                            "updated NVRAM backlight level to %u (0x%02x)\n",
6695                            (unsigned int) lec, (unsigned int) b_nvram);
6696         } else
6697                 vdbg_printk(TPACPI_DBG_BRGHT,
6698                            "NVRAM backlight level already is %u (0x%02x)\n",
6699                            (unsigned int) lec, (unsigned int) b_nvram);
6700
6701 unlock:
6702         mutex_unlock(&brightness_mutex);
6703 }
6704
6705
6706 /* call with brightness_mutex held! */
6707 static int tpacpi_brightness_get_raw(int *status)
6708 {
6709         u8 lec = 0;
6710
6711         switch (brightness_mode) {
6712         case TPACPI_BRGHT_MODE_UCMS_STEP:
6713                 *status = tpacpi_brightness_nvram_get();
6714                 return 0;
6715         case TPACPI_BRGHT_MODE_EC:
6716         case TPACPI_BRGHT_MODE_ECNVRAM:
6717                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6718                         return -EIO;
6719                 *status = lec;
6720                 return 0;
6721         default:
6722                 return -ENXIO;
6723         }
6724 }
6725
6726 /* call with brightness_mutex held! */
6727 /* do NOT call with illegal backlight level value */
6728 static int tpacpi_brightness_set_ec(unsigned int value)
6729 {
6730         u8 lec = 0;
6731
6732         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6733                 return -EIO;
6734
6735         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6736                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6737                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6738                 return -EIO;
6739
6740         return 0;
6741 }
6742
6743 /* call with brightness_mutex held! */
6744 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6745 {
6746         int cmos_cmd, inc;
6747         unsigned int current_value, i;
6748
6749         current_value = tpacpi_brightness_nvram_get();
6750
6751         if (value == current_value)
6752                 return 0;
6753
6754         cmos_cmd = (value > current_value) ?
6755                         TP_CMOS_BRIGHTNESS_UP :
6756                         TP_CMOS_BRIGHTNESS_DOWN;
6757         inc = (value > current_value) ? 1 : -1;
6758
6759         for (i = current_value; i != value; i += inc)
6760                 if (issue_thinkpad_cmos_command(cmos_cmd))
6761                         return -EIO;
6762
6763         return 0;
6764 }
6765
6766 /* May return EINTR which can always be mapped to ERESTARTSYS */
6767 static int brightness_set(unsigned int value)
6768 {
6769         int res;
6770
6771         if (value > bright_maxlvl)
6772                 return -EINVAL;
6773
6774         vdbg_printk(TPACPI_DBG_BRGHT,
6775                         "set backlight level to %d\n", value);
6776
6777         res = mutex_lock_killable(&brightness_mutex);
6778         if (res < 0)
6779                 return res;
6780
6781         switch (brightness_mode) {
6782         case TPACPI_BRGHT_MODE_EC:
6783         case TPACPI_BRGHT_MODE_ECNVRAM:
6784                 res = tpacpi_brightness_set_ec(value);
6785                 break;
6786         case TPACPI_BRGHT_MODE_UCMS_STEP:
6787                 res = tpacpi_brightness_set_ucmsstep(value);
6788                 break;
6789         default:
6790                 res = -ENXIO;
6791         }
6792
6793         mutex_unlock(&brightness_mutex);
6794         return res;
6795 }
6796
6797 /* sysfs backlight class ----------------------------------------------- */
6798
6799 static int brightness_update_status(struct backlight_device *bd)
6800 {
6801         unsigned int level =
6802                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6803                  bd->props.power == FB_BLANK_UNBLANK) ?
6804                                 bd->props.brightness : 0;
6805
6806         dbg_printk(TPACPI_DBG_BRGHT,
6807                         "backlight: attempt to set level to %d\n",
6808                         level);
6809
6810         /* it is the backlight class's job (caller) to handle
6811          * EINTR and other errors properly */
6812         return brightness_set(level);
6813 }
6814
6815 static int brightness_get(struct backlight_device *bd)
6816 {
6817         int status, res;
6818
6819         res = mutex_lock_killable(&brightness_mutex);
6820         if (res < 0)
6821                 return 0;
6822
6823         res = tpacpi_brightness_get_raw(&status);
6824
6825         mutex_unlock(&brightness_mutex);
6826
6827         if (res < 0)
6828                 return 0;
6829
6830         return status & TP_EC_BACKLIGHT_LVLMSK;
6831 }
6832
6833 static void tpacpi_brightness_notify_change(void)
6834 {
6835         backlight_force_update(ibm_backlight_device,
6836                                BACKLIGHT_UPDATE_HOTKEY);
6837 }
6838
6839 static const struct backlight_ops ibm_backlight_data = {
6840         .get_brightness = brightness_get,
6841         .update_status  = brightness_update_status,
6842 };
6843
6844 /* --------------------------------------------------------------------- */
6845
6846 /*
6847  * Call _BCL method of video device.  On some ThinkPads this will
6848  * switch the firmware to the ACPI brightness control mode.
6849  */
6850
6851 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6852 {
6853         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6854         union acpi_object *obj;
6855         struct acpi_device *device, *child;
6856         int rc;
6857
6858         if (acpi_bus_get_device(handle, &device))
6859                 return 0;
6860
6861         rc = 0;
6862         list_for_each_entry(child, &device->children, node) {
6863                 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6864                                                           NULL, &buffer);
6865                 if (ACPI_FAILURE(status))
6866                         continue;
6867
6868                 obj = (union acpi_object *)buffer.pointer;
6869                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6870                         pr_err("Unknown _BCL data, please report this to %s\n",
6871                                 TPACPI_MAIL);
6872                         rc = 0;
6873                 } else {
6874                         rc = obj->package.count;
6875                 }
6876                 break;
6877         }
6878
6879         kfree(buffer.pointer);
6880         return rc;
6881 }
6882
6883
6884 /*
6885  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6886  */
6887 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6888 {
6889         acpi_handle video_device;
6890         int bcl_levels = 0;
6891
6892         tpacpi_acpi_handle_locate("video", NULL, &video_device);
6893         if (video_device)
6894                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6895
6896         tp_features.bright_acpimode = (bcl_levels > 0);
6897
6898         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6899 }
6900
6901 /*
6902  * These are only useful for models that have only one possibility
6903  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6904  * these quirks.
6905  */
6906 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6907 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6908 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6909
6910 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6911         /* Models with ATI GPUs known to require ECNVRAM mode */
6912         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6913
6914         /* Models with ATI GPUs that can use ECNVRAM */
6915         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6916         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6917         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6918         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6919
6920         /* Models with Intel Extreme Graphics 2 */
6921         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6922         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6923         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6924
6925         /* Models with Intel GMA900 */
6926         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6927         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6928         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6929 };
6930
6931 /*
6932  * Returns < 0 for error, otherwise sets tp_features.bright_*
6933  * and bright_maxlvl.
6934  */
6935 static void __init tpacpi_detect_brightness_capabilities(void)
6936 {
6937         unsigned int b;
6938
6939         vdbg_printk(TPACPI_DBG_INIT,
6940                     "detecting firmware brightness interface capabilities\n");
6941
6942         /* we could run a quirks check here (same table used by
6943          * brightness_init) if needed */
6944
6945         /*
6946          * We always attempt to detect acpi support, so as to switch
6947          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6948          * going to publish a backlight interface
6949          */
6950         b = tpacpi_check_std_acpi_brightness_support();
6951         switch (b) {
6952         case 16:
6953                 bright_maxlvl = 15;
6954                 break;
6955         case 8:
6956         case 0:
6957                 bright_maxlvl = 7;
6958                 break;
6959         default:
6960                 tp_features.bright_unkfw = 1;
6961                 bright_maxlvl = b - 1;
6962         }
6963         pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6964 }
6965
6966 static int __init brightness_init(struct ibm_init_struct *iibm)
6967 {
6968         struct backlight_properties props;
6969         int b;
6970         unsigned long quirks;
6971
6972         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6973
6974         mutex_init(&brightness_mutex);
6975
6976         quirks = tpacpi_check_quirks(brightness_quirk_table,
6977                                 ARRAY_SIZE(brightness_quirk_table));
6978
6979         /* tpacpi_detect_brightness_capabilities() must have run already */
6980
6981         /* if it is unknown, we don't handle it: it wouldn't be safe */
6982         if (tp_features.bright_unkfw)
6983                 return 1;
6984
6985         if (!brightness_enable) {
6986                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6987                            "brightness support disabled by module parameter\n");
6988                 return 1;
6989         }
6990
6991         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6992                 if (brightness_enable > 1) {
6993                         pr_info("Standard ACPI backlight interface available, not loading native one\n");
6994                         return 1;
6995                 } else if (brightness_enable == 1) {
6996                         pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
6997                         return 1;
6998                 }
6999         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
7000                 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n");
7001         }
7002
7003         /*
7004          * Check for module parameter bogosity, note that we
7005          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
7006          * able to detect "unspecified"
7007          */
7008         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
7009                 return -EINVAL;
7010
7011         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7012         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7013             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7014                 if (quirks & TPACPI_BRGHT_Q_EC)
7015                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7016                 else
7017                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7018
7019                 dbg_printk(TPACPI_DBG_BRGHT,
7020                            "driver auto-selected brightness_mode=%d\n",
7021                            brightness_mode);
7022         }
7023
7024         /* Safety */
7025         if (!tpacpi_is_ibm() &&
7026             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7027              brightness_mode == TPACPI_BRGHT_MODE_EC))
7028                 return -EINVAL;
7029
7030         if (tpacpi_brightness_get_raw(&b) < 0)
7031                 return 1;
7032
7033         memset(&props, 0, sizeof(struct backlight_properties));
7034         props.type = BACKLIGHT_PLATFORM;
7035         props.max_brightness = bright_maxlvl;
7036         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7037         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7038                                                          NULL, NULL,
7039                                                          &ibm_backlight_data,
7040                                                          &props);
7041         if (IS_ERR(ibm_backlight_device)) {
7042                 int rc = PTR_ERR(ibm_backlight_device);
7043                 ibm_backlight_device = NULL;
7044                 pr_err("Could not register backlight device\n");
7045                 return rc;
7046         }
7047         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7048                         "brightness is supported\n");
7049
7050         if (quirks & TPACPI_BRGHT_Q_ASK) {
7051                 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7052                           brightness_mode);
7053                 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7054                           TPACPI_MAIL);
7055         }
7056
7057         /* Added by mistake in early 2007.  Probably useless, but it could
7058          * be working around some unknown firmware problem where the value
7059          * read at startup doesn't match the real hardware state... so leave
7060          * it in place just in case */
7061         backlight_update_status(ibm_backlight_device);
7062
7063         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7064                     "brightness: registering brightness hotkeys as change notification\n");
7065         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7066                                 | TP_ACPI_HKEY_BRGHTUP_MASK
7067                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
7068         return 0;
7069 }
7070
7071 static void brightness_suspend(void)
7072 {
7073         tpacpi_brightness_checkpoint_nvram();
7074 }
7075
7076 static void brightness_shutdown(void)
7077 {
7078         tpacpi_brightness_checkpoint_nvram();
7079 }
7080
7081 static void brightness_exit(void)
7082 {
7083         if (ibm_backlight_device) {
7084                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7085                             "calling backlight_device_unregister()\n");
7086                 backlight_device_unregister(ibm_backlight_device);
7087         }
7088
7089         tpacpi_brightness_checkpoint_nvram();
7090 }
7091
7092 static int brightness_read(struct seq_file *m)
7093 {
7094         int level;
7095
7096         level = brightness_get(NULL);
7097         if (level < 0) {
7098                 seq_printf(m, "level:\t\tunreadable\n");
7099         } else {
7100                 seq_printf(m, "level:\t\t%d\n", level);
7101                 seq_printf(m, "commands:\tup, down\n");
7102                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7103                                bright_maxlvl);
7104         }
7105
7106         return 0;
7107 }
7108
7109 static int brightness_write(char *buf)
7110 {
7111         int level;
7112         int rc;
7113         char *cmd;
7114
7115         level = brightness_get(NULL);
7116         if (level < 0)
7117                 return level;
7118
7119         while ((cmd = next_cmd(&buf))) {
7120                 if (strlencmp(cmd, "up") == 0) {
7121                         if (level < bright_maxlvl)
7122                                 level++;
7123                 } else if (strlencmp(cmd, "down") == 0) {
7124                         if (level > 0)
7125                                 level--;
7126                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7127                            level >= 0 && level <= bright_maxlvl) {
7128                         /* new level set */
7129                 } else
7130                         return -EINVAL;
7131         }
7132
7133         tpacpi_disclose_usertask("procfs brightness",
7134                         "set level to %d\n", level);
7135
7136         /*
7137          * Now we know what the final level should be, so we try to set it.
7138          * Doing it this way makes the syscall restartable in case of EINTR
7139          */
7140         rc = brightness_set(level);
7141         if (!rc && ibm_backlight_device)
7142                 backlight_force_update(ibm_backlight_device,
7143                                         BACKLIGHT_UPDATE_SYSFS);
7144         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7145 }
7146
7147 static struct ibm_struct brightness_driver_data = {
7148         .name = "brightness",
7149         .read = brightness_read,
7150         .write = brightness_write,
7151         .exit = brightness_exit,
7152         .suspend = brightness_suspend,
7153         .shutdown = brightness_shutdown,
7154 };
7155
7156 /*************************************************************************
7157  * Volume subdriver
7158  */
7159
7160 /*
7161  * IBM ThinkPads have a simple volume controller with MUTE gating.
7162  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7163  *
7164  * Since the *61 series (and probably also the later *60 series), Lenovo
7165  * ThinkPads only implement the MUTE gate.
7166  *
7167  * EC register 0x30
7168  *   Bit 6: MUTE (1 mutes sound)
7169  *   Bit 3-0: Volume
7170  *   Other bits should be zero as far as we know.
7171  *
7172  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7173  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
7174  * such as bit 7 which is used to detect repeated presses of MUTE,
7175  * and we leave them unchanged.
7176  *
7177  * On newer Lenovo ThinkPads, the EC can automatically change the volume
7178  * in response to user input.  Unfortunately, this rarely works well.
7179  * The laptop changes the state of its internal MUTE gate and, on some
7180  * models, sends KEY_MUTE, causing any user code that responds to the
7181  * mute button to get confused.  The hardware MUTE gate is also
7182  * unnecessary, since user code can handle the mute button without
7183  * kernel or EC help.
7184  *
7185  * To avoid confusing userspace, we simply disable all EC-based mute
7186  * and volume controls when possible.
7187  */
7188
7189 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7190
7191 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
7192 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7193 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7194
7195 #if SNDRV_CARDS <= 32
7196 #define DEFAULT_ALSA_IDX                ~((1 << (SNDRV_CARDS - 3)) - 1)
7197 #else
7198 #define DEFAULT_ALSA_IDX                ~((1 << (32 - 3)) - 1)
7199 #endif
7200 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7201 static char *alsa_id = "ThinkPadEC";
7202 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7203
7204 struct tpacpi_alsa_data {
7205         struct snd_card *card;
7206         struct snd_ctl_elem_id *ctl_mute_id;
7207         struct snd_ctl_elem_id *ctl_vol_id;
7208 };
7209
7210 static struct snd_card *alsa_card;
7211
7212 enum {
7213         TP_EC_AUDIO = 0x30,
7214
7215         /* TP_EC_AUDIO bits */
7216         TP_EC_AUDIO_MUTESW = 6,
7217
7218         /* TP_EC_AUDIO bitmasks */
7219         TP_EC_AUDIO_LVL_MSK = 0x0F,
7220         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7221
7222         /* Maximum volume */
7223         TP_EC_VOLUME_MAX = 14,
7224 };
7225
7226 enum tpacpi_volume_access_mode {
7227         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
7228         TPACPI_VOL_MODE_EC,             /* Pure EC control */
7229         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
7230         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
7231         TPACPI_VOL_MODE_MAX
7232 };
7233
7234 enum tpacpi_volume_capabilities {
7235         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
7236         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
7237         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
7238         TPACPI_VOL_CAP_MAX
7239 };
7240
7241 enum tpacpi_mute_btn_mode {
7242         TP_EC_MUTE_BTN_LATCH  = 0,      /* Mute mutes; up/down unmutes */
7243         /* We don't know what mode 1 is. */
7244         TP_EC_MUTE_BTN_NONE   = 2,      /* Mute and up/down are just keys */
7245         TP_EC_MUTE_BTN_TOGGLE = 3,      /* Mute toggles; up/down unmutes */
7246 };
7247
7248 static enum tpacpi_volume_access_mode volume_mode =
7249         TPACPI_VOL_MODE_MAX;
7250
7251 static enum tpacpi_volume_capabilities volume_capabilities;
7252 static bool volume_control_allowed;
7253 static bool software_mute_requested = true;
7254 static bool software_mute_active;
7255 static int software_mute_orig_mode;
7256
7257 /*
7258  * Used to syncronize writers to TP_EC_AUDIO and
7259  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7260  */
7261 static struct mutex volume_mutex;
7262
7263 static void tpacpi_volume_checkpoint_nvram(void)
7264 {
7265         u8 lec = 0;
7266         u8 b_nvram;
7267         u8 ec_mask;
7268
7269         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7270                 return;
7271         if (!volume_control_allowed)
7272                 return;
7273         if (software_mute_active)
7274                 return;
7275
7276         vdbg_printk(TPACPI_DBG_MIXER,
7277                 "trying to checkpoint mixer state to NVRAM...\n");
7278
7279         if (tp_features.mixer_no_level_control)
7280                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7281         else
7282                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7283
7284         if (mutex_lock_killable(&volume_mutex) < 0)
7285                 return;
7286
7287         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7288                 goto unlock;
7289         lec &= ec_mask;
7290         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7291
7292         if (lec != (b_nvram & ec_mask)) {
7293                 /* NVRAM needs update */
7294                 b_nvram &= ~ec_mask;
7295                 b_nvram |= lec;
7296                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7297                 dbg_printk(TPACPI_DBG_MIXER,
7298                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7299                            (unsigned int) lec, (unsigned int) b_nvram);
7300         } else {
7301                 vdbg_printk(TPACPI_DBG_MIXER,
7302                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7303                            (unsigned int) lec, (unsigned int) b_nvram);
7304         }
7305
7306 unlock:
7307         mutex_unlock(&volume_mutex);
7308 }
7309
7310 static int volume_get_status_ec(u8 *status)
7311 {
7312         u8 s;
7313
7314         if (!acpi_ec_read(TP_EC_AUDIO, &s))
7315                 return -EIO;
7316
7317         *status = s;
7318
7319         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7320
7321         return 0;
7322 }
7323
7324 static int volume_get_status(u8 *status)
7325 {
7326         return volume_get_status_ec(status);
7327 }
7328
7329 static int volume_set_status_ec(const u8 status)
7330 {
7331         if (!acpi_ec_write(TP_EC_AUDIO, status))
7332                 return -EIO;
7333
7334         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7335
7336         /*
7337          * On X200s, and possibly on others, it can take a while for
7338          * reads to become correct.
7339          */
7340         msleep(1);
7341
7342         return 0;
7343 }
7344
7345 static int volume_set_status(const u8 status)
7346 {
7347         return volume_set_status_ec(status);
7348 }
7349
7350 /* returns < 0 on error, 0 on no change, 1 on change */
7351 static int __volume_set_mute_ec(const bool mute)
7352 {
7353         int rc;
7354         u8 s, n;
7355
7356         if (mutex_lock_killable(&volume_mutex) < 0)
7357                 return -EINTR;
7358
7359         rc = volume_get_status_ec(&s);
7360         if (rc)
7361                 goto unlock;
7362
7363         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7364                      s & ~TP_EC_AUDIO_MUTESW_MSK;
7365
7366         if (n != s) {
7367                 rc = volume_set_status_ec(n);
7368                 if (!rc)
7369                         rc = 1;
7370         }
7371
7372 unlock:
7373         mutex_unlock(&volume_mutex);
7374         return rc;
7375 }
7376
7377 static int volume_alsa_set_mute(const bool mute)
7378 {
7379         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7380                    (mute) ? "" : "un");
7381         return __volume_set_mute_ec(mute);
7382 }
7383
7384 static int volume_set_mute(const bool mute)
7385 {
7386         int rc;
7387
7388         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7389                    (mute) ? "" : "un");
7390
7391         rc = __volume_set_mute_ec(mute);
7392         return (rc < 0) ? rc : 0;
7393 }
7394
7395 /* returns < 0 on error, 0 on no change, 1 on change */
7396 static int __volume_set_volume_ec(const u8 vol)
7397 {
7398         int rc;
7399         u8 s, n;
7400
7401         if (vol > TP_EC_VOLUME_MAX)
7402                 return -EINVAL;
7403
7404         if (mutex_lock_killable(&volume_mutex) < 0)
7405                 return -EINTR;
7406
7407         rc = volume_get_status_ec(&s);
7408         if (rc)
7409                 goto unlock;
7410
7411         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7412
7413         if (n != s) {
7414                 rc = volume_set_status_ec(n);
7415                 if (!rc)
7416                         rc = 1;
7417         }
7418
7419 unlock:
7420         mutex_unlock(&volume_mutex);
7421         return rc;
7422 }
7423
7424 static int volume_set_software_mute(bool startup)
7425 {
7426         int result;
7427
7428         if (!tpacpi_is_lenovo())
7429                 return -ENODEV;
7430
7431         if (startup) {
7432                 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7433                                 "HAUM", "qd"))
7434                         return -EIO;
7435
7436                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7437                             "Initial HAUM setting was %d\n",
7438                             software_mute_orig_mode);
7439         }
7440
7441         if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7442                         (int)TP_EC_MUTE_BTN_NONE))
7443                 return -EIO;
7444
7445         if (result != TP_EC_MUTE_BTN_NONE)
7446                 pr_warn("Unexpected SAUM result %d\n",
7447                         result);
7448
7449         /*
7450          * In software mute mode, the standard codec controls take
7451          * precendence, so we unmute the ThinkPad HW switch at
7452          * startup.  Just on case there are SAUM-capable ThinkPads
7453          * with level controls, set max HW volume as well.
7454          */
7455         if (tp_features.mixer_no_level_control)
7456                 result = volume_set_mute(false);
7457         else
7458                 result = volume_set_status(TP_EC_VOLUME_MAX);
7459
7460         if (result != 0)
7461                 pr_warn("Failed to unmute the HW mute switch\n");
7462
7463         return 0;
7464 }
7465
7466 static void volume_exit_software_mute(void)
7467 {
7468         int r;
7469
7470         if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7471             || r != software_mute_orig_mode)
7472                 pr_warn("Failed to restore mute mode\n");
7473 }
7474
7475 static int volume_alsa_set_volume(const u8 vol)
7476 {
7477         dbg_printk(TPACPI_DBG_MIXER,
7478                    "ALSA: trying to set volume level to %hu\n", vol);
7479         return __volume_set_volume_ec(vol);
7480 }
7481
7482 static void volume_alsa_notify_change(void)
7483 {
7484         struct tpacpi_alsa_data *d;
7485
7486         if (alsa_card && alsa_card->private_data) {
7487                 d = alsa_card->private_data;
7488                 if (d->ctl_mute_id)
7489                         snd_ctl_notify(alsa_card,
7490                                         SNDRV_CTL_EVENT_MASK_VALUE,
7491                                         d->ctl_mute_id);
7492                 if (d->ctl_vol_id)
7493                         snd_ctl_notify(alsa_card,
7494                                         SNDRV_CTL_EVENT_MASK_VALUE,
7495                                         d->ctl_vol_id);
7496         }
7497 }
7498
7499 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7500                                 struct snd_ctl_elem_info *uinfo)
7501 {
7502         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7503         uinfo->count = 1;
7504         uinfo->value.integer.min = 0;
7505         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7506         return 0;
7507 }
7508
7509 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7510                                 struct snd_ctl_elem_value *ucontrol)
7511 {
7512         u8 s;
7513         int rc;
7514
7515         rc = volume_get_status(&s);
7516         if (rc < 0)
7517                 return rc;
7518
7519         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7520         return 0;
7521 }
7522
7523 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7524                                 struct snd_ctl_elem_value *ucontrol)
7525 {
7526         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7527                                  ucontrol->value.integer.value[0]);
7528         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7529 }
7530
7531 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7532
7533 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7534                                 struct snd_ctl_elem_value *ucontrol)
7535 {
7536         u8 s;
7537         int rc;
7538
7539         rc = volume_get_status(&s);
7540         if (rc < 0)
7541                 return rc;
7542
7543         ucontrol->value.integer.value[0] =
7544                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7545         return 0;
7546 }
7547
7548 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7549                                 struct snd_ctl_elem_value *ucontrol)
7550 {
7551         tpacpi_disclose_usertask("ALSA", "%smute\n",
7552                                  ucontrol->value.integer.value[0] ?
7553                                         "un" : "");
7554         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7555 }
7556
7557 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7558         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7559         .name = "Console Playback Volume",
7560         .index = 0,
7561         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7562         .info = volume_alsa_vol_info,
7563         .get = volume_alsa_vol_get,
7564 };
7565
7566 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7567         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7568         .name = "Console Playback Switch",
7569         .index = 0,
7570         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7571         .info = volume_alsa_mute_info,
7572         .get = volume_alsa_mute_get,
7573 };
7574
7575 static void volume_suspend(void)
7576 {
7577         tpacpi_volume_checkpoint_nvram();
7578 }
7579
7580 static void volume_resume(void)
7581 {
7582         if (software_mute_active) {
7583                 if (volume_set_software_mute(false) < 0)
7584                         pr_warn("Failed to restore software mute\n");
7585         } else {
7586                 volume_alsa_notify_change();
7587         }
7588 }
7589
7590 static void volume_shutdown(void)
7591 {
7592         tpacpi_volume_checkpoint_nvram();
7593 }
7594
7595 static void volume_exit(void)
7596 {
7597         if (alsa_card) {
7598                 snd_card_free(alsa_card);
7599                 alsa_card = NULL;
7600         }
7601
7602         tpacpi_volume_checkpoint_nvram();
7603
7604         if (software_mute_active)
7605                 volume_exit_software_mute();
7606 }
7607
7608 static int __init volume_create_alsa_mixer(void)
7609 {
7610         struct snd_card *card;
7611         struct tpacpi_alsa_data *data;
7612         struct snd_kcontrol *ctl_vol;
7613         struct snd_kcontrol *ctl_mute;
7614         int rc;
7615
7616         rc = snd_card_new(&tpacpi_pdev->dev,
7617                           alsa_index, alsa_id, THIS_MODULE,
7618                           sizeof(struct tpacpi_alsa_data), &card);
7619         if (rc < 0 || !card) {
7620                 pr_err("Failed to create ALSA card structures: %d\n", rc);
7621                 return 1;
7622         }
7623
7624         BUG_ON(!card->private_data);
7625         data = card->private_data;
7626         data->card = card;
7627
7628         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7629                 sizeof(card->driver));
7630         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7631                 sizeof(card->shortname));
7632         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7633                  (thinkpad_id.ec_version_str) ?
7634                         thinkpad_id.ec_version_str : "(unknown)");
7635         snprintf(card->longname, sizeof(card->longname),
7636                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7637                  (thinkpad_id.ec_version_str) ?
7638                         thinkpad_id.ec_version_str : "unknown");
7639
7640         if (volume_control_allowed) {
7641                 volume_alsa_control_vol.put = volume_alsa_vol_put;
7642                 volume_alsa_control_vol.access =
7643                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7644
7645                 volume_alsa_control_mute.put = volume_alsa_mute_put;
7646                 volume_alsa_control_mute.access =
7647                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7648         }
7649
7650         if (!tp_features.mixer_no_level_control) {
7651                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7652                 rc = snd_ctl_add(card, ctl_vol);
7653                 if (rc < 0) {
7654                         pr_err("Failed to create ALSA volume control: %d\n",
7655                                rc);
7656                         goto err_exit;
7657                 }
7658                 data->ctl_vol_id = &ctl_vol->id;
7659         }
7660
7661         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7662         rc = snd_ctl_add(card, ctl_mute);
7663         if (rc < 0) {
7664                 pr_err("Failed to create ALSA mute control: %d\n", rc);
7665                 goto err_exit;
7666         }
7667         data->ctl_mute_id = &ctl_mute->id;
7668
7669         rc = snd_card_register(card);
7670         if (rc < 0) {
7671                 pr_err("Failed to register ALSA card: %d\n", rc);
7672                 goto err_exit;
7673         }
7674
7675         alsa_card = card;
7676         return 0;
7677
7678 err_exit:
7679         snd_card_free(card);
7680         return 1;
7681 }
7682
7683 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
7684 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
7685
7686 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7687         /* Whitelist volume level on all IBM by default */
7688         { .vendor = PCI_VENDOR_ID_IBM,
7689           .bios   = TPACPI_MATCH_ANY,
7690           .ec     = TPACPI_MATCH_ANY,
7691           .quirks = TPACPI_VOL_Q_LEVEL },
7692
7693         /* Lenovo models with volume control (needs confirmation) */
7694         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7695         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7696         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7697         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7698         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7699         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7700         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7701
7702         /* Whitelist mute-only on all Lenovo by default */
7703         { .vendor = PCI_VENDOR_ID_LENOVO,
7704           .bios   = TPACPI_MATCH_ANY,
7705           .ec     = TPACPI_MATCH_ANY,
7706           .quirks = TPACPI_VOL_Q_MUTEONLY }
7707 };
7708
7709 static int __init volume_init(struct ibm_init_struct *iibm)
7710 {
7711         unsigned long quirks;
7712         int rc;
7713
7714         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7715
7716         mutex_init(&volume_mutex);
7717
7718         /*
7719          * Check for module parameter bogosity, note that we
7720          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7721          * able to detect "unspecified"
7722          */
7723         if (volume_mode > TPACPI_VOL_MODE_MAX)
7724                 return -EINVAL;
7725
7726         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7727                 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7728                        TPACPI_MAIL);
7729                 return 1;
7730         }
7731
7732         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7733                 return -EINVAL;
7734
7735         /*
7736          * The ALSA mixer is our primary interface.
7737          * When disabled, don't install the subdriver at all
7738          */
7739         if (!alsa_enable) {
7740                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7741                             "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7742                 return 1;
7743         }
7744
7745         quirks = tpacpi_check_quirks(volume_quirk_table,
7746                                      ARRAY_SIZE(volume_quirk_table));
7747
7748         switch (volume_capabilities) {
7749         case TPACPI_VOL_CAP_AUTO:
7750                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7751                         tp_features.mixer_no_level_control = 1;
7752                 else if (quirks & TPACPI_VOL_Q_LEVEL)
7753                         tp_features.mixer_no_level_control = 0;
7754                 else
7755                         return 1; /* no mixer */
7756                 break;
7757         case TPACPI_VOL_CAP_VOLMUTE:
7758                 tp_features.mixer_no_level_control = 0;
7759                 break;
7760         case TPACPI_VOL_CAP_MUTEONLY:
7761                 tp_features.mixer_no_level_control = 1;
7762                 break;
7763         default:
7764                 return 1;
7765         }
7766
7767         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7768                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7769                                 "using user-supplied volume_capabilities=%d\n",
7770                                 volume_capabilities);
7771
7772         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7773             volume_mode == TPACPI_VOL_MODE_MAX) {
7774                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7775
7776                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7777                                 "driver auto-selected volume_mode=%d\n",
7778                                 volume_mode);
7779         } else {
7780                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7781                                 "using user-supplied volume_mode=%d\n",
7782                                 volume_mode);
7783         }
7784
7785         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7786                         "mute is supported, volume control is %s\n",
7787                         str_supported(!tp_features.mixer_no_level_control));
7788
7789         if (software_mute_requested && volume_set_software_mute(true) == 0) {
7790                 software_mute_active = true;
7791         } else {
7792                 rc = volume_create_alsa_mixer();
7793                 if (rc) {
7794                         pr_err("Could not create the ALSA mixer interface\n");
7795                         return rc;
7796                 }
7797
7798                 pr_info("Console audio control enabled, mode: %s\n",
7799                         (volume_control_allowed) ?
7800                                 "override (read/write)" :
7801                                 "monitor (read only)");
7802         }
7803
7804         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7805                 "registering volume hotkeys as change notification\n");
7806         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7807                         | TP_ACPI_HKEY_VOLUP_MASK
7808                         | TP_ACPI_HKEY_VOLDWN_MASK
7809                         | TP_ACPI_HKEY_MUTE_MASK);
7810
7811         return 0;
7812 }
7813
7814 static int volume_read(struct seq_file *m)
7815 {
7816         u8 status;
7817
7818         if (volume_get_status(&status) < 0) {
7819                 seq_printf(m, "level:\t\tunreadable\n");
7820         } else {
7821                 if (tp_features.mixer_no_level_control)
7822                         seq_printf(m, "level:\t\tunsupported\n");
7823                 else
7824                         seq_printf(m, "level:\t\t%d\n",
7825                                         status & TP_EC_AUDIO_LVL_MSK);
7826
7827                 seq_printf(m, "mute:\t\t%s\n",
7828                                 onoff(status, TP_EC_AUDIO_MUTESW));
7829
7830                 if (volume_control_allowed) {
7831                         seq_printf(m, "commands:\tunmute, mute\n");
7832                         if (!tp_features.mixer_no_level_control) {
7833                                 seq_printf(m, "commands:\tup, down\n");
7834                                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7835                                               TP_EC_VOLUME_MAX);
7836                         }
7837                 }
7838         }
7839
7840         return 0;
7841 }
7842
7843 static int volume_write(char *buf)
7844 {
7845         u8 s;
7846         u8 new_level, new_mute;
7847         int l;
7848         char *cmd;
7849         int rc;
7850
7851         /*
7852          * We do allow volume control at driver startup, so that the
7853          * user can set initial state through the volume=... parameter hack.
7854          */
7855         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7856                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7857                         tp_warned.volume_ctrl_forbidden = 1;
7858                         pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7859                         pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7860                 }
7861                 return -EPERM;
7862         }
7863
7864         rc = volume_get_status(&s);
7865         if (rc < 0)
7866                 return rc;
7867
7868         new_level = s & TP_EC_AUDIO_LVL_MSK;
7869         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7870
7871         while ((cmd = next_cmd(&buf))) {
7872                 if (!tp_features.mixer_no_level_control) {
7873                         if (strlencmp(cmd, "up") == 0) {
7874                                 if (new_mute)
7875                                         new_mute = 0;
7876                                 else if (new_level < TP_EC_VOLUME_MAX)
7877                                         new_level++;
7878                                 continue;
7879                         } else if (strlencmp(cmd, "down") == 0) {
7880                                 if (new_mute)
7881                                         new_mute = 0;
7882                                 else if (new_level > 0)
7883                                         new_level--;
7884                                 continue;
7885                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7886                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7887                                         new_level = l;
7888                                 continue;
7889                         }
7890                 }
7891                 if (strlencmp(cmd, "mute") == 0)
7892                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7893                 else if (strlencmp(cmd, "unmute") == 0)
7894                         new_mute = 0;
7895                 else
7896                         return -EINVAL;
7897         }
7898
7899         if (tp_features.mixer_no_level_control) {
7900                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7901                                         new_mute ? "" : "un");
7902                 rc = volume_set_mute(!!new_mute);
7903         } else {
7904                 tpacpi_disclose_usertask("procfs volume",
7905                                         "%smute and set level to %d\n",
7906                                         new_mute ? "" : "un", new_level);
7907                 rc = volume_set_status(new_mute | new_level);
7908         }
7909         volume_alsa_notify_change();
7910
7911         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7912 }
7913
7914 static struct ibm_struct volume_driver_data = {
7915         .name = "volume",
7916         .read = volume_read,
7917         .write = volume_write,
7918         .exit = volume_exit,
7919         .suspend = volume_suspend,
7920         .resume = volume_resume,
7921         .shutdown = volume_shutdown,
7922 };
7923
7924 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7925
7926 #define alsa_card NULL
7927
7928 static inline void volume_alsa_notify_change(void)
7929 {
7930 }
7931
7932 static int __init volume_init(struct ibm_init_struct *iibm)
7933 {
7934         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7935
7936         return 1;
7937 }
7938
7939 static struct ibm_struct volume_driver_data = {
7940         .name = "volume",
7941 };
7942
7943 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7944
7945 /*************************************************************************
7946  * Fan subdriver
7947  */
7948
7949 /*
7950  * FAN ACCESS MODES
7951  *
7952  * TPACPI_FAN_RD_ACPI_GFAN:
7953  *      ACPI GFAN method: returns fan level
7954  *
7955  *      see TPACPI_FAN_WR_ACPI_SFAN
7956  *      EC 0x2f (HFSP) not available if GFAN exists
7957  *
7958  * TPACPI_FAN_WR_ACPI_SFAN:
7959  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7960  *
7961  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7962  *      it for writing.
7963  *
7964  * TPACPI_FAN_WR_TPEC:
7965  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7966  *      Supported on almost all ThinkPads
7967  *
7968  *      Fan speed changes of any sort (including those caused by the
7969  *      disengaged mode) are usually done slowly by the firmware as the
7970  *      maximum amount of fan duty cycle change per second seems to be
7971  *      limited.
7972  *
7973  *      Reading is not available if GFAN exists.
7974  *      Writing is not available if SFAN exists.
7975  *
7976  *      Bits
7977  *       7      automatic mode engaged;
7978  *              (default operation mode of the ThinkPad)
7979  *              fan level is ignored in this mode.
7980  *       6      full speed mode (takes precedence over bit 7);
7981  *              not available on all thinkpads.  May disable
7982  *              the tachometer while the fan controller ramps up
7983  *              the speed (which can take up to a few *minutes*).
7984  *              Speeds up fan to 100% duty-cycle, which is far above
7985  *              the standard RPM levels.  It is not impossible that
7986  *              it could cause hardware damage.
7987  *      5-3     unused in some models.  Extra bits for fan level
7988  *              in others, but still useless as all values above
7989  *              7 map to the same speed as level 7 in these models.
7990  *      2-0     fan level (0..7 usually)
7991  *                      0x00 = stop
7992  *                      0x07 = max (set when temperatures critical)
7993  *              Some ThinkPads may have other levels, see
7994  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7995  *
7996  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7997  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7998  *      does so, its initial value is meaningless (0x07).
7999  *
8000  *      For firmware bugs, refer to:
8001  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8002  *
8003  *      ----
8004  *
8005  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
8006  *      Main fan tachometer reading (in RPM)
8007  *
8008  *      This register is present on all ThinkPads with a new-style EC, and
8009  *      it is known not to be present on the A21m/e, and T22, as there is
8010  *      something else in offset 0x84 according to the ACPI DSDT.  Other
8011  *      ThinkPads from this same time period (and earlier) probably lack the
8012  *      tachometer as well.
8013  *
8014  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8015  *      was never fixed by IBM to report the EC firmware version string
8016  *      probably support the tachometer (like the early X models), so
8017  *      detecting it is quite hard.  We need more data to know for sure.
8018  *
8019  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8020  *      might result.
8021  *
8022  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
8023  *      mode.
8024  *
8025  *      For firmware bugs, refer to:
8026  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8027  *
8028  *      ----
8029  *
8030  *      ThinkPad EC register 0x31 bit 0 (only on select models)
8031  *
8032  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
8033  *      show the speed of the main fan.  When bit 0 of EC register 0x31
8034  *      is one, the tachometer registers show the speed of the auxiliary
8035  *      fan.
8036  *
8037  *      Fan control seems to affect both fans, regardless of the state
8038  *      of this bit.
8039  *
8040  *      So far, only the firmware for the X60/X61 non-tablet versions
8041  *      seem to support this (firmware TP-7M).
8042  *
8043  * TPACPI_FAN_WR_ACPI_FANS:
8044  *      ThinkPad X31, X40, X41.  Not available in the X60.
8045  *
8046  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
8047  *      high speed.  ACPI DSDT seems to map these three speeds to levels
8048  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8049  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8050  *
8051  *      The speeds are stored on handles
8052  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
8053  *
8054  *      There are three default speed sets, accessible as handles:
8055  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8056  *
8057  *      ACPI DSDT switches which set is in use depending on various
8058  *      factors.
8059  *
8060  *      TPACPI_FAN_WR_TPEC is also available and should be used to
8061  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
8062  *      but the ACPI tables just mention level 7.
8063  */
8064
8065 enum {                                  /* Fan control constants */
8066         fan_status_offset = 0x2f,       /* EC register 0x2f */
8067         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
8068                                          * 0x84 must be read before 0x85 */
8069         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
8070                                            bit 0 selects which fan is active */
8071
8072         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
8073         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
8074
8075         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
8076 };
8077
8078 enum fan_status_access_mode {
8079         TPACPI_FAN_NONE = 0,            /* No fan status or control */
8080         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
8081         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
8082 };
8083
8084 enum fan_control_access_mode {
8085         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
8086         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
8087         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
8088         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
8089 };
8090
8091 enum fan_control_commands {
8092         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
8093         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
8094         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
8095                                                  * and also watchdog cmd */
8096 };
8097
8098 static bool fan_control_allowed;
8099
8100 static enum fan_status_access_mode fan_status_access_mode;
8101 static enum fan_control_access_mode fan_control_access_mode;
8102 static enum fan_control_commands fan_control_commands;
8103
8104 static u8 fan_control_initial_status;
8105 static u8 fan_control_desired_level;
8106 static u8 fan_control_resume_level;
8107 static int fan_watchdog_maxinterval;
8108
8109 static struct mutex fan_mutex;
8110
8111 static void fan_watchdog_fire(struct work_struct *ignored);
8112 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8113
8114 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
8115 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8116            "\\FSPD",            /* 600e/x, 770e, 770x */
8117            );                   /* all others */
8118 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8119            "JFNS",              /* 770x-JL */
8120            );                   /* all others */
8121
8122 /*
8123  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8124  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8125  * be in auto mode (0x80).
8126  *
8127  * This is corrected by any write to HFSP either by the driver, or
8128  * by the firmware.
8129  *
8130  * We assume 0x07 really means auto mode while this quirk is active,
8131  * as this is far more likely than the ThinkPad being in level 7,
8132  * which is only used by the firmware during thermal emergencies.
8133  *
8134  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8135  * TP-70 (T43, R52), which are known to be buggy.
8136  */
8137
8138 static void fan_quirk1_setup(void)
8139 {
8140         if (fan_control_initial_status == 0x07) {
8141                 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8142                 tp_features.fan_ctrl_status_undef = 1;
8143         }
8144 }
8145
8146 static void fan_quirk1_handle(u8 *fan_status)
8147 {
8148         if (unlikely(tp_features.fan_ctrl_status_undef)) {
8149                 if (*fan_status != fan_control_initial_status) {
8150                         /* something changed the HFSP regisnter since
8151                          * driver init time, so it is not undefined
8152                          * anymore */
8153                         tp_features.fan_ctrl_status_undef = 0;
8154                 } else {
8155                         /* Return most likely status. In fact, it
8156                          * might be the only possible status */
8157                         *fan_status = TP_EC_FAN_AUTO;
8158                 }
8159         }
8160 }
8161
8162 /* Select main fan on X60/X61, NOOP on others */
8163 static bool fan_select_fan1(void)
8164 {
8165         if (tp_features.second_fan) {
8166                 u8 val;
8167
8168                 if (ec_read(fan_select_offset, &val) < 0)
8169                         return false;
8170                 val &= 0xFEU;
8171                 if (ec_write(fan_select_offset, val) < 0)
8172                         return false;
8173         }
8174         return true;
8175 }
8176
8177 /* Select secondary fan on X60/X61 */
8178 static bool fan_select_fan2(void)
8179 {
8180         u8 val;
8181
8182         if (!tp_features.second_fan)
8183                 return false;
8184
8185         if (ec_read(fan_select_offset, &val) < 0)
8186                 return false;
8187         val |= 0x01U;
8188         if (ec_write(fan_select_offset, val) < 0)
8189                 return false;
8190
8191         return true;
8192 }
8193
8194 /*
8195  * Call with fan_mutex held
8196  */
8197 static void fan_update_desired_level(u8 status)
8198 {
8199         if ((status &
8200              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8201                 if (status > 7)
8202                         fan_control_desired_level = 7;
8203                 else
8204                         fan_control_desired_level = status;
8205         }
8206 }
8207
8208 static int fan_get_status(u8 *status)
8209 {
8210         u8 s;
8211
8212         /* TODO:
8213          * Add TPACPI_FAN_RD_ACPI_FANS ? */
8214
8215         switch (fan_status_access_mode) {
8216         case TPACPI_FAN_RD_ACPI_GFAN: {
8217                 /* 570, 600e/x, 770e, 770x */
8218                 int res;
8219
8220                 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8221                         return -EIO;
8222
8223                 if (likely(status))
8224                         *status = res & 0x07;
8225
8226                 break;
8227         }
8228         case TPACPI_FAN_RD_TPEC:
8229                 /* all except 570, 600e/x, 770e, 770x */
8230                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8231                         return -EIO;
8232
8233                 if (likely(status)) {
8234                         *status = s;
8235                         fan_quirk1_handle(status);
8236                 }
8237
8238                 break;
8239
8240         default:
8241                 return -ENXIO;
8242         }
8243
8244         return 0;
8245 }
8246
8247 static int fan_get_status_safe(u8 *status)
8248 {
8249         int rc;
8250         u8 s;
8251
8252         if (mutex_lock_killable(&fan_mutex))
8253                 return -ERESTARTSYS;
8254         rc = fan_get_status(&s);
8255         if (!rc)
8256                 fan_update_desired_level(s);
8257         mutex_unlock(&fan_mutex);
8258
8259         if (rc)
8260                 return rc;
8261         if (status)
8262                 *status = s;
8263
8264         return 0;
8265 }
8266
8267 static int fan_get_speed(unsigned int *speed)
8268 {
8269         u8 hi, lo;
8270
8271         switch (fan_status_access_mode) {
8272         case TPACPI_FAN_RD_TPEC:
8273                 /* all except 570, 600e/x, 770e, 770x */
8274                 if (unlikely(!fan_select_fan1()))
8275                         return -EIO;
8276                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8277                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8278                         return -EIO;
8279
8280                 if (likely(speed))
8281                         *speed = (hi << 8) | lo;
8282
8283                 break;
8284
8285         default:
8286                 return -ENXIO;
8287         }
8288
8289         return 0;
8290 }
8291
8292 static int fan2_get_speed(unsigned int *speed)
8293 {
8294         u8 hi, lo;
8295         bool rc;
8296
8297         switch (fan_status_access_mode) {
8298         case TPACPI_FAN_RD_TPEC:
8299                 /* all except 570, 600e/x, 770e, 770x */
8300                 if (unlikely(!fan_select_fan2()))
8301                         return -EIO;
8302                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8303                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
8304                 fan_select_fan1(); /* play it safe */
8305                 if (rc)
8306                         return -EIO;
8307
8308                 if (likely(speed))
8309                         *speed = (hi << 8) | lo;
8310
8311                 break;
8312
8313         default:
8314                 return -ENXIO;
8315         }
8316
8317         return 0;
8318 }
8319
8320 static int fan_set_level(int level)
8321 {
8322         if (!fan_control_allowed)
8323                 return -EPERM;
8324
8325         switch (fan_control_access_mode) {
8326         case TPACPI_FAN_WR_ACPI_SFAN:
8327                 if (level >= 0 && level <= 7) {
8328                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8329                                 return -EIO;
8330                 } else
8331                         return -EINVAL;
8332                 break;
8333
8334         case TPACPI_FAN_WR_ACPI_FANS:
8335         case TPACPI_FAN_WR_TPEC:
8336                 if (!(level & TP_EC_FAN_AUTO) &&
8337                     !(level & TP_EC_FAN_FULLSPEED) &&
8338                     ((level < 0) || (level > 7)))
8339                         return -EINVAL;
8340
8341                 /* safety net should the EC not support AUTO
8342                  * or FULLSPEED mode bits and just ignore them */
8343                 if (level & TP_EC_FAN_FULLSPEED)
8344                         level |= 7;     /* safety min speed 7 */
8345                 else if (level & TP_EC_FAN_AUTO)
8346                         level |= 4;     /* safety min speed 4 */
8347
8348                 if (!acpi_ec_write(fan_status_offset, level))
8349                         return -EIO;
8350                 else
8351                         tp_features.fan_ctrl_status_undef = 0;
8352                 break;
8353
8354         default:
8355                 return -ENXIO;
8356         }
8357
8358         vdbg_printk(TPACPI_DBG_FAN,
8359                 "fan control: set fan control register to 0x%02x\n", level);
8360         return 0;
8361 }
8362
8363 static int fan_set_level_safe(int level)
8364 {
8365         int rc;
8366
8367         if (!fan_control_allowed)
8368                 return -EPERM;
8369
8370         if (mutex_lock_killable(&fan_mutex))
8371                 return -ERESTARTSYS;
8372
8373         if (level == TPACPI_FAN_LAST_LEVEL)
8374                 level = fan_control_desired_level;
8375
8376         rc = fan_set_level(level);
8377         if (!rc)
8378                 fan_update_desired_level(level);
8379
8380         mutex_unlock(&fan_mutex);
8381         return rc;
8382 }
8383
8384 static int fan_set_enable(void)
8385 {
8386         u8 s;
8387         int rc;
8388
8389         if (!fan_control_allowed)
8390                 return -EPERM;
8391
8392         if (mutex_lock_killable(&fan_mutex))
8393                 return -ERESTARTSYS;
8394
8395         switch (fan_control_access_mode) {
8396         case TPACPI_FAN_WR_ACPI_FANS:
8397         case TPACPI_FAN_WR_TPEC:
8398                 rc = fan_get_status(&s);
8399                 if (rc < 0)
8400                         break;
8401
8402                 /* Don't go out of emergency fan mode */
8403                 if (s != 7) {
8404                         s &= 0x07;
8405                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8406                 }
8407
8408                 if (!acpi_ec_write(fan_status_offset, s))
8409                         rc = -EIO;
8410                 else {
8411                         tp_features.fan_ctrl_status_undef = 0;
8412                         rc = 0;
8413                 }
8414                 break;
8415
8416         case TPACPI_FAN_WR_ACPI_SFAN:
8417                 rc = fan_get_status(&s);
8418                 if (rc < 0)
8419                         break;
8420
8421                 s &= 0x07;
8422
8423                 /* Set fan to at least level 4 */
8424                 s |= 4;
8425
8426                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8427                         rc = -EIO;
8428                 else
8429                         rc = 0;
8430                 break;
8431
8432         default:
8433                 rc = -ENXIO;
8434         }
8435
8436         mutex_unlock(&fan_mutex);
8437
8438         if (!rc)
8439                 vdbg_printk(TPACPI_DBG_FAN,
8440                         "fan control: set fan control register to 0x%02x\n",
8441                         s);
8442         return rc;
8443 }
8444
8445 static int fan_set_disable(void)
8446 {
8447         int rc;
8448
8449         if (!fan_control_allowed)
8450                 return -EPERM;
8451
8452         if (mutex_lock_killable(&fan_mutex))
8453                 return -ERESTARTSYS;
8454
8455         rc = 0;
8456         switch (fan_control_access_mode) {
8457         case TPACPI_FAN_WR_ACPI_FANS:
8458         case TPACPI_FAN_WR_TPEC:
8459                 if (!acpi_ec_write(fan_status_offset, 0x00))
8460                         rc = -EIO;
8461                 else {
8462                         fan_control_desired_level = 0;
8463                         tp_features.fan_ctrl_status_undef = 0;
8464                 }
8465                 break;
8466
8467         case TPACPI_FAN_WR_ACPI_SFAN:
8468                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8469                         rc = -EIO;
8470                 else
8471                         fan_control_desired_level = 0;
8472                 break;
8473
8474         default:
8475                 rc = -ENXIO;
8476         }
8477
8478         if (!rc)
8479                 vdbg_printk(TPACPI_DBG_FAN,
8480                         "fan control: set fan control register to 0\n");
8481
8482         mutex_unlock(&fan_mutex);
8483         return rc;
8484 }
8485
8486 static int fan_set_speed(int speed)
8487 {
8488         int rc;
8489
8490         if (!fan_control_allowed)
8491                 return -EPERM;
8492
8493         if (mutex_lock_killable(&fan_mutex))
8494                 return -ERESTARTSYS;
8495
8496         rc = 0;
8497         switch (fan_control_access_mode) {
8498         case TPACPI_FAN_WR_ACPI_FANS:
8499                 if (speed >= 0 && speed <= 65535) {
8500                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8501                                         speed, speed, speed))
8502                                 rc = -EIO;
8503                 } else
8504                         rc = -EINVAL;
8505                 break;
8506
8507         default:
8508                 rc = -ENXIO;
8509         }
8510
8511         mutex_unlock(&fan_mutex);
8512         return rc;
8513 }
8514
8515 static void fan_watchdog_reset(void)
8516 {
8517         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8518                 return;
8519
8520         if (fan_watchdog_maxinterval > 0 &&
8521             tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8522                 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8523                         msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8524         else
8525                 cancel_delayed_work(&fan_watchdog_task);
8526 }
8527
8528 static void fan_watchdog_fire(struct work_struct *ignored)
8529 {
8530         int rc;
8531
8532         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8533                 return;
8534
8535         pr_notice("fan watchdog: enabling fan\n");
8536         rc = fan_set_enable();
8537         if (rc < 0) {
8538                 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8539                        rc);
8540                 /* reschedule for later */
8541                 fan_watchdog_reset();
8542         }
8543 }
8544
8545 /*
8546  * SYSFS fan layout: hwmon compatible (device)
8547  *
8548  * pwm*_enable:
8549  *      0: "disengaged" mode
8550  *      1: manual mode
8551  *      2: native EC "auto" mode (recommended, hardware default)
8552  *
8553  * pwm*: set speed in manual mode, ignored otherwise.
8554  *      0 is level 0; 255 is level 7. Intermediate points done with linear
8555  *      interpolation.
8556  *
8557  * fan*_input: tachometer reading, RPM
8558  *
8559  *
8560  * SYSFS fan layout: extensions
8561  *
8562  * fan_watchdog (driver):
8563  *      fan watchdog interval in seconds, 0 disables (default), max 120
8564  */
8565
8566 /* sysfs fan pwm1_enable ----------------------------------------------- */
8567 static ssize_t fan_pwm1_enable_show(struct device *dev,
8568                                     struct device_attribute *attr,
8569                                     char *buf)
8570 {
8571         int res, mode;
8572         u8 status;
8573
8574         res = fan_get_status_safe(&status);
8575         if (res)
8576                 return res;
8577
8578         if (status & TP_EC_FAN_FULLSPEED) {
8579                 mode = 0;
8580         } else if (status & TP_EC_FAN_AUTO) {
8581                 mode = 2;
8582         } else
8583                 mode = 1;
8584
8585         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8586 }
8587
8588 static ssize_t fan_pwm1_enable_store(struct device *dev,
8589                                      struct device_attribute *attr,
8590                                      const char *buf, size_t count)
8591 {
8592         unsigned long t;
8593         int res, level;
8594
8595         if (parse_strtoul(buf, 2, &t))
8596                 return -EINVAL;
8597
8598         tpacpi_disclose_usertask("hwmon pwm1_enable",
8599                         "set fan mode to %lu\n", t);
8600
8601         switch (t) {
8602         case 0:
8603                 level = TP_EC_FAN_FULLSPEED;
8604                 break;
8605         case 1:
8606                 level = TPACPI_FAN_LAST_LEVEL;
8607                 break;
8608         case 2:
8609                 level = TP_EC_FAN_AUTO;
8610                 break;
8611         case 3:
8612                 /* reserved for software-controlled auto mode */
8613                 return -ENOSYS;
8614         default:
8615                 return -EINVAL;
8616         }
8617
8618         res = fan_set_level_safe(level);
8619         if (res == -ENXIO)
8620                 return -EINVAL;
8621         else if (res < 0)
8622                 return res;
8623
8624         fan_watchdog_reset();
8625
8626         return count;
8627 }
8628
8629 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8630                    fan_pwm1_enable_show, fan_pwm1_enable_store);
8631
8632 /* sysfs fan pwm1 ------------------------------------------------------ */
8633 static ssize_t fan_pwm1_show(struct device *dev,
8634                              struct device_attribute *attr,
8635                              char *buf)
8636 {
8637         int res;
8638         u8 status;
8639
8640         res = fan_get_status_safe(&status);
8641         if (res)
8642                 return res;
8643
8644         if ((status &
8645              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8646                 status = fan_control_desired_level;
8647
8648         if (status > 7)
8649                 status = 7;
8650
8651         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8652 }
8653
8654 static ssize_t fan_pwm1_store(struct device *dev,
8655                               struct device_attribute *attr,
8656                               const char *buf, size_t count)
8657 {
8658         unsigned long s;
8659         int rc;
8660         u8 status, newlevel;
8661
8662         if (parse_strtoul(buf, 255, &s))
8663                 return -EINVAL;
8664
8665         tpacpi_disclose_usertask("hwmon pwm1",
8666                         "set fan speed to %lu\n", s);
8667
8668         /* scale down from 0-255 to 0-7 */
8669         newlevel = (s >> 5) & 0x07;
8670
8671         if (mutex_lock_killable(&fan_mutex))
8672                 return -ERESTARTSYS;
8673
8674         rc = fan_get_status(&status);
8675         if (!rc && (status &
8676                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8677                 rc = fan_set_level(newlevel);
8678                 if (rc == -ENXIO)
8679                         rc = -EINVAL;
8680                 else if (!rc) {
8681                         fan_update_desired_level(newlevel);
8682                         fan_watchdog_reset();
8683                 }
8684         }
8685
8686         mutex_unlock(&fan_mutex);
8687         return (rc) ? rc : count;
8688 }
8689
8690 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8691
8692 /* sysfs fan fan1_input ------------------------------------------------ */
8693 static ssize_t fan_fan1_input_show(struct device *dev,
8694                            struct device_attribute *attr,
8695                            char *buf)
8696 {
8697         int res;
8698         unsigned int speed;
8699
8700         res = fan_get_speed(&speed);
8701         if (res < 0)
8702                 return res;
8703
8704         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8705 }
8706
8707 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8708
8709 /* sysfs fan fan2_input ------------------------------------------------ */
8710 static ssize_t fan_fan2_input_show(struct device *dev,
8711                            struct device_attribute *attr,
8712                            char *buf)
8713 {
8714         int res;
8715         unsigned int speed;
8716
8717         res = fan2_get_speed(&speed);
8718         if (res < 0)
8719                 return res;
8720
8721         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8722 }
8723
8724 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8725
8726 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8727 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8728 {
8729         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8730 }
8731
8732 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8733                                   size_t count)
8734 {
8735         unsigned long t;
8736
8737         if (parse_strtoul(buf, 120, &t))
8738                 return -EINVAL;
8739
8740         if (!fan_control_allowed)
8741                 return -EPERM;
8742
8743         fan_watchdog_maxinterval = t;
8744         fan_watchdog_reset();
8745
8746         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8747
8748         return count;
8749 }
8750 static DRIVER_ATTR_RW(fan_watchdog);
8751
8752 /* --------------------------------------------------------------------- */
8753 static struct attribute *fan_attributes[] = {
8754         &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8755         &dev_attr_fan1_input.attr,
8756         NULL, /* for fan2_input */
8757         NULL
8758 };
8759
8760 static const struct attribute_group fan_attr_group = {
8761         .attrs = fan_attributes,
8762 };
8763
8764 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
8765 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
8766
8767 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8768         TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8769         TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8770         TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8771         TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8772         TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8773         TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8774 };
8775
8776 static int __init fan_init(struct ibm_init_struct *iibm)
8777 {
8778         int rc;
8779         unsigned long quirks;
8780
8781         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8782                         "initializing fan subdriver\n");
8783
8784         mutex_init(&fan_mutex);
8785         fan_status_access_mode = TPACPI_FAN_NONE;
8786         fan_control_access_mode = TPACPI_FAN_WR_NONE;
8787         fan_control_commands = 0;
8788         fan_watchdog_maxinterval = 0;
8789         tp_features.fan_ctrl_status_undef = 0;
8790         tp_features.second_fan = 0;
8791         fan_control_desired_level = 7;
8792
8793         if (tpacpi_is_ibm()) {
8794                 TPACPI_ACPIHANDLE_INIT(fans);
8795                 TPACPI_ACPIHANDLE_INIT(gfan);
8796                 TPACPI_ACPIHANDLE_INIT(sfan);
8797         }
8798
8799         quirks = tpacpi_check_quirks(fan_quirk_table,
8800                                      ARRAY_SIZE(fan_quirk_table));
8801
8802         if (gfan_handle) {
8803                 /* 570, 600e/x, 770e, 770x */
8804                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8805         } else {
8806                 /* all other ThinkPads: note that even old-style
8807                  * ThinkPad ECs supports the fan control register */
8808                 if (likely(acpi_ec_read(fan_status_offset,
8809                                         &fan_control_initial_status))) {
8810                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8811                         if (quirks & TPACPI_FAN_Q1)
8812                                 fan_quirk1_setup();
8813                         if (quirks & TPACPI_FAN_2FAN) {
8814                                 tp_features.second_fan = 1;
8815                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8816                                         "secondary fan support enabled\n");
8817                         }
8818                 } else {
8819                         pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8820                         return 1;
8821                 }
8822         }
8823
8824         if (sfan_handle) {
8825                 /* 570, 770x-JL */
8826                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8827                 fan_control_commands |=
8828                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8829         } else {
8830                 if (!gfan_handle) {
8831                         /* gfan without sfan means no fan control */
8832                         /* all other models implement TP EC 0x2f control */
8833
8834                         if (fans_handle) {
8835                                 /* X31, X40, X41 */
8836                                 fan_control_access_mode =
8837                                     TPACPI_FAN_WR_ACPI_FANS;
8838                                 fan_control_commands |=
8839                                     TPACPI_FAN_CMD_SPEED |
8840                                     TPACPI_FAN_CMD_LEVEL |
8841                                     TPACPI_FAN_CMD_ENABLE;
8842                         } else {
8843                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8844                                 fan_control_commands |=
8845                                     TPACPI_FAN_CMD_LEVEL |
8846                                     TPACPI_FAN_CMD_ENABLE;
8847                         }
8848                 }
8849         }
8850
8851         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8852                 "fan is %s, modes %d, %d\n",
8853                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8854                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8855                 fan_status_access_mode, fan_control_access_mode);
8856
8857         /* fan control master switch */
8858         if (!fan_control_allowed) {
8859                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8860                 fan_control_commands = 0;
8861                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8862                            "fan control features disabled by parameter\n");
8863         }
8864
8865         /* update fan_control_desired_level */
8866         if (fan_status_access_mode != TPACPI_FAN_NONE)
8867                 fan_get_status_safe(NULL);
8868
8869         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8870             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8871                 if (tp_features.second_fan) {
8872                         /* attach second fan tachometer */
8873                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8874                                         &dev_attr_fan2_input.attr;
8875                 }
8876                 rc = sysfs_create_group(&tpacpi_hwmon->kobj,
8877                                          &fan_attr_group);
8878                 if (rc < 0)
8879                         return rc;
8880
8881                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8882                                         &driver_attr_fan_watchdog);
8883                 if (rc < 0) {
8884                         sysfs_remove_group(&tpacpi_hwmon->kobj,
8885                                         &fan_attr_group);
8886                         return rc;
8887                 }
8888                 return 0;
8889         } else
8890                 return 1;
8891 }
8892
8893 static void fan_exit(void)
8894 {
8895         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8896                     "cancelling any pending fan watchdog tasks\n");
8897
8898         /* FIXME: can we really do this unconditionally? */
8899         sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
8900         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8901                            &driver_attr_fan_watchdog);
8902
8903         cancel_delayed_work(&fan_watchdog_task);
8904         flush_workqueue(tpacpi_wq);
8905 }
8906
8907 static void fan_suspend(void)
8908 {
8909         int rc;
8910
8911         if (!fan_control_allowed)
8912                 return;
8913
8914         /* Store fan status in cache */
8915         fan_control_resume_level = 0;
8916         rc = fan_get_status_safe(&fan_control_resume_level);
8917         if (rc < 0)
8918                 pr_notice("failed to read fan level for later restore during resume: %d\n",
8919                           rc);
8920
8921         /* if it is undefined, don't attempt to restore it.
8922          * KEEP THIS LAST */
8923         if (tp_features.fan_ctrl_status_undef)
8924                 fan_control_resume_level = 0;
8925 }
8926
8927 static void fan_resume(void)
8928 {
8929         u8 current_level = 7;
8930         bool do_set = false;
8931         int rc;
8932
8933         /* DSDT *always* updates status on resume */
8934         tp_features.fan_ctrl_status_undef = 0;
8935
8936         if (!fan_control_allowed ||
8937             !fan_control_resume_level ||
8938             (fan_get_status_safe(&current_level) < 0))
8939                 return;
8940
8941         switch (fan_control_access_mode) {
8942         case TPACPI_FAN_WR_ACPI_SFAN:
8943                 /* never decrease fan level */
8944                 do_set = (fan_control_resume_level > current_level);
8945                 break;
8946         case TPACPI_FAN_WR_ACPI_FANS:
8947         case TPACPI_FAN_WR_TPEC:
8948                 /* never decrease fan level, scale is:
8949                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8950                  *
8951                  * We expect the firmware to set either 7 or AUTO, but we
8952                  * handle FULLSPEED out of paranoia.
8953                  *
8954                  * So, we can safely only restore FULLSPEED or 7, anything
8955                  * else could slow the fan.  Restoring AUTO is useless, at
8956                  * best that's exactly what the DSDT already set (it is the
8957                  * slower it uses).
8958                  *
8959                  * Always keep in mind that the DSDT *will* have set the
8960                  * fans to what the vendor supposes is the best level.  We
8961                  * muck with it only to speed the fan up.
8962                  */
8963                 if (fan_control_resume_level != 7 &&
8964                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8965                         return;
8966                 else
8967                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8968                                  (current_level != fan_control_resume_level);
8969                 break;
8970         default:
8971                 return;
8972         }
8973         if (do_set) {
8974                 pr_notice("restoring fan level to 0x%02x\n",
8975                           fan_control_resume_level);
8976                 rc = fan_set_level_safe(fan_control_resume_level);
8977                 if (rc < 0)
8978                         pr_notice("failed to restore fan level: %d\n", rc);
8979         }
8980 }
8981
8982 static int fan_read(struct seq_file *m)
8983 {
8984         int rc;
8985         u8 status;
8986         unsigned int speed = 0;
8987
8988         switch (fan_status_access_mode) {
8989         case TPACPI_FAN_RD_ACPI_GFAN:
8990                 /* 570, 600e/x, 770e, 770x */
8991                 rc = fan_get_status_safe(&status);
8992                 if (rc < 0)
8993                         return rc;
8994
8995                 seq_printf(m, "status:\t\t%s\n"
8996                                "level:\t\t%d\n",
8997                                (status != 0) ? "enabled" : "disabled", status);
8998                 break;
8999
9000         case TPACPI_FAN_RD_TPEC:
9001                 /* all except 570, 600e/x, 770e, 770x */
9002                 rc = fan_get_status_safe(&status);
9003                 if (rc < 0)
9004                         return rc;
9005
9006                 seq_printf(m, "status:\t\t%s\n",
9007                                (status != 0) ? "enabled" : "disabled");
9008
9009                 rc = fan_get_speed(&speed);
9010                 if (rc < 0)
9011                         return rc;
9012
9013                 seq_printf(m, "speed:\t\t%d\n", speed);
9014
9015                 if (status & TP_EC_FAN_FULLSPEED)
9016                         /* Disengaged mode takes precedence */
9017                         seq_printf(m, "level:\t\tdisengaged\n");
9018                 else if (status & TP_EC_FAN_AUTO)
9019                         seq_printf(m, "level:\t\tauto\n");
9020                 else
9021                         seq_printf(m, "level:\t\t%d\n", status);
9022                 break;
9023
9024         case TPACPI_FAN_NONE:
9025         default:
9026                 seq_printf(m, "status:\t\tnot supported\n");
9027         }
9028
9029         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9030                 seq_printf(m, "commands:\tlevel <level>");
9031
9032                 switch (fan_control_access_mode) {
9033                 case TPACPI_FAN_WR_ACPI_SFAN:
9034                         seq_printf(m, " (<level> is 0-7)\n");
9035                         break;
9036
9037                 default:
9038                         seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9039                         break;
9040                 }
9041         }
9042
9043         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9044                 seq_printf(m, "commands:\tenable, disable\n"
9045                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9046
9047         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9048                 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9049
9050         return 0;
9051 }
9052
9053 static int fan_write_cmd_level(const char *cmd, int *rc)
9054 {
9055         int level;
9056
9057         if (strlencmp(cmd, "level auto") == 0)
9058                 level = TP_EC_FAN_AUTO;
9059         else if ((strlencmp(cmd, "level disengaged") == 0) |
9060                         (strlencmp(cmd, "level full-speed") == 0))
9061                 level = TP_EC_FAN_FULLSPEED;
9062         else if (sscanf(cmd, "level %d", &level) != 1)
9063                 return 0;
9064
9065         *rc = fan_set_level_safe(level);
9066         if (*rc == -ENXIO)
9067                 pr_err("level command accepted for unsupported access mode %d\n",
9068                        fan_control_access_mode);
9069         else if (!*rc)
9070                 tpacpi_disclose_usertask("procfs fan",
9071                         "set level to %d\n", level);
9072
9073         return 1;
9074 }
9075
9076 static int fan_write_cmd_enable(const char *cmd, int *rc)
9077 {
9078         if (strlencmp(cmd, "enable") != 0)
9079                 return 0;
9080
9081         *rc = fan_set_enable();
9082         if (*rc == -ENXIO)
9083                 pr_err("enable command accepted for unsupported access mode %d\n",
9084                        fan_control_access_mode);
9085         else if (!*rc)
9086                 tpacpi_disclose_usertask("procfs fan", "enable\n");
9087
9088         return 1;
9089 }
9090
9091 static int fan_write_cmd_disable(const char *cmd, int *rc)
9092 {
9093         if (strlencmp(cmd, "disable") != 0)
9094                 return 0;
9095
9096         *rc = fan_set_disable();
9097         if (*rc == -ENXIO)
9098                 pr_err("disable command accepted for unsupported access mode %d\n",
9099                        fan_control_access_mode);
9100         else if (!*rc)
9101                 tpacpi_disclose_usertask("procfs fan", "disable\n");
9102
9103         return 1;
9104 }
9105
9106 static int fan_write_cmd_speed(const char *cmd, int *rc)
9107 {
9108         int speed;
9109
9110         /* TODO:
9111          * Support speed <low> <medium> <high> ? */
9112
9113         if (sscanf(cmd, "speed %d", &speed) != 1)
9114                 return 0;
9115
9116         *rc = fan_set_speed(speed);
9117         if (*rc == -ENXIO)
9118                 pr_err("speed command accepted for unsupported access mode %d\n",
9119                        fan_control_access_mode);
9120         else if (!*rc)
9121                 tpacpi_disclose_usertask("procfs fan",
9122                         "set speed to %d\n", speed);
9123
9124         return 1;
9125 }
9126
9127 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9128 {
9129         int interval;
9130
9131         if (sscanf(cmd, "watchdog %d", &interval) != 1)
9132                 return 0;
9133
9134         if (interval < 0 || interval > 120)
9135                 *rc = -EINVAL;
9136         else {
9137                 fan_watchdog_maxinterval = interval;
9138                 tpacpi_disclose_usertask("procfs fan",
9139                         "set watchdog timer to %d\n",
9140                         interval);
9141         }
9142
9143         return 1;
9144 }
9145
9146 static int fan_write(char *buf)
9147 {
9148         char *cmd;
9149         int rc = 0;
9150
9151         while (!rc && (cmd = next_cmd(&buf))) {
9152                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9153                       fan_write_cmd_level(cmd, &rc)) &&
9154                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9155                       (fan_write_cmd_enable(cmd, &rc) ||
9156                        fan_write_cmd_disable(cmd, &rc) ||
9157                        fan_write_cmd_watchdog(cmd, &rc))) &&
9158                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9159                       fan_write_cmd_speed(cmd, &rc))
9160                     )
9161                         rc = -EINVAL;
9162                 else if (!rc)
9163                         fan_watchdog_reset();
9164         }
9165
9166         return rc;
9167 }
9168
9169 static struct ibm_struct fan_driver_data = {
9170         .name = "fan",
9171         .read = fan_read,
9172         .write = fan_write,
9173         .exit = fan_exit,
9174         .suspend = fan_suspend,
9175         .resume = fan_resume,
9176 };
9177
9178 /*************************************************************************
9179  * Mute LED subdriver
9180  */
9181
9182 #define TPACPI_LED_MAX          2
9183
9184 struct tp_led_table {
9185         acpi_string name;
9186         int on_value;
9187         int off_value;
9188         int state;
9189 };
9190
9191 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9192         [LED_AUDIO_MUTE] = {
9193                 .name = "SSMS",
9194                 .on_value = 1,
9195                 .off_value = 0,
9196         },
9197         [LED_AUDIO_MICMUTE] = {
9198                 .name = "MMTS",
9199                 .on_value = 2,
9200                 .off_value = 0,
9201         },
9202 };
9203
9204 static int mute_led_on_off(struct tp_led_table *t, bool state)
9205 {
9206         acpi_handle temp;
9207         int output;
9208
9209         if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9210                 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9211                 return -EIO;
9212         }
9213
9214         if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9215                         state ? t->on_value : t->off_value))
9216                 return -EIO;
9217
9218         t->state = state;
9219         return state;
9220 }
9221
9222 static int tpacpi_led_set(int whichled, bool on)
9223 {
9224         struct tp_led_table *t;
9225
9226         t = &led_tables[whichled];
9227         if (t->state < 0 || t->state == on)
9228                 return t->state;
9229         return mute_led_on_off(t, on);
9230 }
9231
9232 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9233                                enum led_brightness brightness)
9234 {
9235         return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9236 }
9237
9238 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9239                                   enum led_brightness brightness)
9240 {
9241         return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9242 }
9243
9244 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9245         [LED_AUDIO_MUTE] = {
9246                 .name           = "platform::mute",
9247                 .max_brightness = 1,
9248                 .brightness_set_blocking = tpacpi_led_mute_set,
9249                 .default_trigger = "audio-mute",
9250         },
9251         [LED_AUDIO_MICMUTE] = {
9252                 .name           = "platform::micmute",
9253                 .max_brightness = 1,
9254                 .brightness_set_blocking = tpacpi_led_micmute_set,
9255                 .default_trigger = "audio-micmute",
9256         },
9257 };
9258
9259 static int mute_led_init(struct ibm_init_struct *iibm)
9260 {
9261         acpi_handle temp;
9262         int i, err;
9263
9264         for (i = 0; i < TPACPI_LED_MAX; i++) {
9265                 struct tp_led_table *t = &led_tables[i];
9266                 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9267                         t->state = -ENODEV;
9268                         continue;
9269                 }
9270
9271                 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9272                 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9273                 if (err < 0) {
9274                         while (i--) {
9275                                 if (led_tables[i].state >= 0)
9276                                         led_classdev_unregister(&mute_led_cdev[i]);
9277                         }
9278                         return err;
9279                 }
9280         }
9281         return 0;
9282 }
9283
9284 static void mute_led_exit(void)
9285 {
9286         int i;
9287
9288         for (i = 0; i < TPACPI_LED_MAX; i++) {
9289                 if (led_tables[i].state >= 0) {
9290                         led_classdev_unregister(&mute_led_cdev[i]);
9291                         tpacpi_led_set(i, false);
9292                 }
9293         }
9294 }
9295
9296 static void mute_led_resume(void)
9297 {
9298         int i;
9299
9300         for (i = 0; i < TPACPI_LED_MAX; i++) {
9301                 struct tp_led_table *t = &led_tables[i];
9302                 if (t->state >= 0)
9303                         mute_led_on_off(t, t->state);
9304         }
9305 }
9306
9307 static struct ibm_struct mute_led_driver_data = {
9308         .name = "mute_led",
9309         .exit = mute_led_exit,
9310         .resume = mute_led_resume,
9311 };
9312
9313 /*
9314  * Battery Wear Control Driver
9315  * Contact: Ognjen Galic <smclt30p@gmail.com>
9316  */
9317
9318 /* Metadata */
9319
9320 #define GET_START       "BCTG"
9321 #define SET_START       "BCCS"
9322 #define GET_STOP        "BCSG"
9323 #define SET_STOP        "BCSS"
9324
9325 #define START_ATTR "charge_start_threshold"
9326 #define STOP_ATTR  "charge_stop_threshold"
9327
9328 enum {
9329         BAT_ANY = 0,
9330         BAT_PRIMARY = 1,
9331         BAT_SECONDARY = 2
9332 };
9333
9334 enum {
9335         /* Error condition bit */
9336         METHOD_ERR = BIT(31),
9337 };
9338
9339 enum {
9340         /* This is used in the get/set helpers */
9341         THRESHOLD_START,
9342         THRESHOLD_STOP,
9343 };
9344
9345 struct tpacpi_battery_data {
9346         int charge_start;
9347         int start_support;
9348         int charge_stop;
9349         int stop_support;
9350 };
9351
9352 struct tpacpi_battery_driver_data {
9353         struct tpacpi_battery_data batteries[3];
9354         int individual_addressing;
9355 };
9356
9357 static struct tpacpi_battery_driver_data battery_info;
9358
9359 /* ACPI helpers/functions/probes */
9360
9361 /**
9362  * This evaluates a ACPI method call specific to the battery
9363  * ACPI extension. The specifics are that an error is marked
9364  * in the 32rd bit of the response, so we just check that here.
9365  */
9366 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9367 {
9368         int response;
9369
9370         if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9371                 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9372                 return AE_ERROR;
9373         }
9374         if (response & METHOD_ERR) {
9375                 acpi_handle_err(hkey_handle,
9376                                 "%s evaluated but flagged as error", method);
9377                 return AE_ERROR;
9378         }
9379         *ret = response;
9380         return AE_OK;
9381 }
9382
9383 static int tpacpi_battery_get(int what, int battery, int *ret)
9384 {
9385         switch (what) {
9386         case THRESHOLD_START:
9387                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9388                         return -ENODEV;
9389
9390                 /* The value is in the low 8 bits of the response */
9391                 *ret = *ret & 0xFF;
9392                 return 0;
9393         case THRESHOLD_STOP:
9394                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9395                         return -ENODEV;
9396                 /* Value is in lower 8 bits */
9397                 *ret = *ret & 0xFF;
9398                 /*
9399                  * On the stop value, if we return 0 that
9400                  * does not make any sense. 0 means Default, which
9401                  * means that charging stops at 100%, so we return
9402                  * that.
9403                  */
9404                 if (*ret == 0)
9405                         *ret = 100;
9406                 return 0;
9407         default:
9408                 pr_crit("wrong parameter: %d", what);
9409                 return -EINVAL;
9410         }
9411 }
9412
9413 static int tpacpi_battery_set(int what, int battery, int value)
9414 {
9415         int param, ret;
9416         /* The first 8 bits are the value of the threshold */
9417         param = value;
9418         /* The battery ID is in bits 8-9, 2 bits */
9419         param |= battery << 8;
9420
9421         switch (what) {
9422         case THRESHOLD_START:
9423                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9424                         pr_err("failed to set charge threshold on battery %d",
9425                                         battery);
9426                         return -ENODEV;
9427                 }
9428                 return 0;
9429         case THRESHOLD_STOP:
9430                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9431                         pr_err("failed to set stop threshold: %d", battery);
9432                         return -ENODEV;
9433                 }
9434                 return 0;
9435         default:
9436                 pr_crit("wrong parameter: %d", what);
9437                 return -EINVAL;
9438         }
9439 }
9440
9441 static int tpacpi_battery_probe(int battery)
9442 {
9443         int ret = 0;
9444
9445         memset(&battery_info.batteries[battery], 0,
9446                 sizeof(battery_info.batteries[battery]));
9447
9448         /*
9449          * 1) Get the current start threshold
9450          * 2) Check for support
9451          * 3) Get the current stop threshold
9452          * 4) Check for support
9453          */
9454         if (acpi_has_method(hkey_handle, GET_START)) {
9455                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9456                         pr_err("Error probing battery %d\n", battery);
9457                         return -ENODEV;
9458                 }
9459                 /* Individual addressing is in bit 9 */
9460                 if (ret & BIT(9))
9461                         battery_info.individual_addressing = true;
9462                 /* Support is marked in bit 8 */
9463                 if (ret & BIT(8))
9464                         battery_info.batteries[battery].start_support = 1;
9465                 else
9466                         return -ENODEV;
9467                 if (tpacpi_battery_get(THRESHOLD_START, battery,
9468                         &battery_info.batteries[battery].charge_start)) {
9469                         pr_err("Error probing battery %d\n", battery);
9470                         return -ENODEV;
9471                 }
9472         }
9473         if (acpi_has_method(hkey_handle, GET_STOP)) {
9474                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9475                         pr_err("Error probing battery stop; %d\n", battery);
9476                         return -ENODEV;
9477                 }
9478                 /* Support is marked in bit 8 */
9479                 if (ret & BIT(8))
9480                         battery_info.batteries[battery].stop_support = 1;
9481                 else
9482                         return -ENODEV;
9483                 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9484                         &battery_info.batteries[battery].charge_stop)) {
9485                         pr_err("Error probing battery stop: %d\n", battery);
9486                         return -ENODEV;
9487                 }
9488         }
9489         pr_info("battery %d registered (start %d, stop %d)",
9490                         battery,
9491                         battery_info.batteries[battery].charge_start,
9492                         battery_info.batteries[battery].charge_stop);
9493
9494         return 0;
9495 }
9496
9497 /* General helper functions */
9498
9499 static int tpacpi_battery_get_id(const char *battery_name)
9500 {
9501
9502         if (strcmp(battery_name, "BAT0") == 0 ||
9503             tp_features.battery_force_primary)
9504                 return BAT_PRIMARY;
9505         if (strcmp(battery_name, "BAT1") == 0)
9506                 return BAT_SECONDARY;
9507         /*
9508          * If for some reason the battery is not BAT0 nor is it
9509          * BAT1, we will assume it's the default, first battery,
9510          * AKA primary.
9511          */
9512         pr_warn("unknown battery %s, assuming primary", battery_name);
9513         return BAT_PRIMARY;
9514 }
9515
9516 /* sysfs interface */
9517
9518 static ssize_t tpacpi_battery_store(int what,
9519                                     struct device *dev,
9520                                     const char *buf, size_t count)
9521 {
9522         struct power_supply *supply = to_power_supply(dev);
9523         unsigned long value;
9524         int battery, rval;
9525         /*
9526          * Some systems have support for more than
9527          * one battery. If that is the case,
9528          * tpacpi_battery_probe marked that addressing
9529          * them individually is supported, so we do that
9530          * based on the device struct.
9531          *
9532          * On systems that are not supported, we assume
9533          * the primary as most of the ACPI calls fail
9534          * with "Any Battery" as the parameter.
9535          */
9536         if (battery_info.individual_addressing)
9537                 /* BAT_PRIMARY or BAT_SECONDARY */
9538                 battery = tpacpi_battery_get_id(supply->desc->name);
9539         else
9540                 battery = BAT_PRIMARY;
9541
9542         rval = kstrtoul(buf, 10, &value);
9543         if (rval)
9544                 return rval;
9545
9546         switch (what) {
9547         case THRESHOLD_START:
9548                 if (!battery_info.batteries[battery].start_support)
9549                         return -ENODEV;
9550                 /* valid values are [0, 99] */
9551                 if (value < 0 || value > 99)
9552                         return -EINVAL;
9553                 if (value > battery_info.batteries[battery].charge_stop)
9554                         return -EINVAL;
9555                 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9556                         return -ENODEV;
9557                 battery_info.batteries[battery].charge_start = value;
9558                 return count;
9559
9560         case THRESHOLD_STOP:
9561                 if (!battery_info.batteries[battery].stop_support)
9562                         return -ENODEV;
9563                 /* valid values are [1, 100] */
9564                 if (value < 1 || value > 100)
9565                         return -EINVAL;
9566                 if (value < battery_info.batteries[battery].charge_start)
9567                         return -EINVAL;
9568                 battery_info.batteries[battery].charge_stop = value;
9569                 /*
9570                  * When 100 is passed to stop, we need to flip
9571                  * it to 0 as that the EC understands that as
9572                  * "Default", which will charge to 100%
9573                  */
9574                 if (value == 100)
9575                         value = 0;
9576                 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9577                         return -EINVAL;
9578                 return count;
9579         default:
9580                 pr_crit("Wrong parameter: %d", what);
9581                 return -EINVAL;
9582         }
9583         return count;
9584 }
9585
9586 static ssize_t tpacpi_battery_show(int what,
9587                                    struct device *dev,
9588                                    char *buf)
9589 {
9590         struct power_supply *supply = to_power_supply(dev);
9591         int ret, battery;
9592         /*
9593          * Some systems have support for more than
9594          * one battery. If that is the case,
9595          * tpacpi_battery_probe marked that addressing
9596          * them individually is supported, so we;
9597          * based on the device struct.
9598          *
9599          * On systems that are not supported, we assume
9600          * the primary as most of the ACPI calls fail
9601          * with "Any Battery" as the parameter.
9602          */
9603         if (battery_info.individual_addressing)
9604                 /* BAT_PRIMARY or BAT_SECONDARY */
9605                 battery = tpacpi_battery_get_id(supply->desc->name);
9606         else
9607                 battery = BAT_PRIMARY;
9608         if (tpacpi_battery_get(what, battery, &ret))
9609                 return -ENODEV;
9610         return sprintf(buf, "%d\n", ret);
9611 }
9612
9613 static ssize_t charge_start_threshold_show(struct device *device,
9614                                 struct device_attribute *attr,
9615                                 char *buf)
9616 {
9617         return tpacpi_battery_show(THRESHOLD_START, device, buf);
9618 }
9619
9620 static ssize_t charge_stop_threshold_show(struct device *device,
9621                                 struct device_attribute *attr,
9622                                 char *buf)
9623 {
9624         return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9625 }
9626
9627 static ssize_t charge_start_threshold_store(struct device *dev,
9628                                 struct device_attribute *attr,
9629                                 const char *buf, size_t count)
9630 {
9631         return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9632 }
9633
9634 static ssize_t charge_stop_threshold_store(struct device *dev,
9635                                 struct device_attribute *attr,
9636                                 const char *buf, size_t count)
9637 {
9638         return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9639 }
9640
9641 static DEVICE_ATTR_RW(charge_start_threshold);
9642 static DEVICE_ATTR_RW(charge_stop_threshold);
9643
9644 static struct attribute *tpacpi_battery_attrs[] = {
9645         &dev_attr_charge_start_threshold.attr,
9646         &dev_attr_charge_stop_threshold.attr,
9647         NULL,
9648 };
9649
9650 ATTRIBUTE_GROUPS(tpacpi_battery);
9651
9652 /* ACPI battery hooking */
9653
9654 static int tpacpi_battery_add(struct power_supply *battery)
9655 {
9656         int batteryid = tpacpi_battery_get_id(battery->desc->name);
9657
9658         if (tpacpi_battery_probe(batteryid))
9659                 return -ENODEV;
9660         if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9661                 return -ENODEV;
9662         return 0;
9663 }
9664
9665 static int tpacpi_battery_remove(struct power_supply *battery)
9666 {
9667         device_remove_groups(&battery->dev, tpacpi_battery_groups);
9668         return 0;
9669 }
9670
9671 static struct acpi_battery_hook battery_hook = {
9672         .add_battery = tpacpi_battery_add,
9673         .remove_battery = tpacpi_battery_remove,
9674         .name = "ThinkPad Battery Extension",
9675 };
9676
9677 /* Subdriver init/exit */
9678
9679 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9680         /*
9681          * Individual addressing is broken on models that expose the
9682          * primary battery as BAT1.
9683          */
9684         TPACPI_Q_LNV('J', '7', true),       /* B5400 */
9685         TPACPI_Q_LNV('J', 'I', true),       /* Thinkpad 11e */
9686         TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9687         TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9688         TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9689 };
9690
9691 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9692 {
9693         memset(&battery_info, 0, sizeof(battery_info));
9694
9695         tp_features.battery_force_primary = tpacpi_check_quirks(
9696                                         battery_quirk_table,
9697                                         ARRAY_SIZE(battery_quirk_table));
9698
9699         battery_hook_register(&battery_hook);
9700         return 0;
9701 }
9702
9703 static void tpacpi_battery_exit(void)
9704 {
9705         battery_hook_unregister(&battery_hook);
9706 }
9707
9708 static struct ibm_struct battery_driver_data = {
9709         .name = "battery",
9710         .exit = tpacpi_battery_exit,
9711 };
9712
9713 /*************************************************************************
9714  * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9715  */
9716
9717 static int lcdshadow_state;
9718
9719 static int lcdshadow_on_off(bool state)
9720 {
9721         acpi_handle set_shadow_handle;
9722         int output;
9723
9724         if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) {
9725                 pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS");
9726                 return -EIO;
9727         }
9728
9729         if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state))
9730                 return -EIO;
9731
9732         lcdshadow_state = state;
9733         return 0;
9734 }
9735
9736 static int lcdshadow_set(bool on)
9737 {
9738         if (lcdshadow_state < 0)
9739                 return lcdshadow_state;
9740         if (lcdshadow_state == on)
9741                 return 0;
9742         return lcdshadow_on_off(on);
9743 }
9744
9745 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9746 {
9747         acpi_handle get_shadow_handle;
9748         int output;
9749
9750         if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) {
9751                 lcdshadow_state = -ENODEV;
9752                 return 0;
9753         }
9754
9755         if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) {
9756                 lcdshadow_state = -EIO;
9757                 return -EIO;
9758         }
9759         if (!(output & 0x10000)) {
9760                 lcdshadow_state = -ENODEV;
9761                 return 0;
9762         }
9763         lcdshadow_state = output & 0x1;
9764
9765         return 0;
9766 }
9767
9768 static void lcdshadow_resume(void)
9769 {
9770         if (lcdshadow_state >= 0)
9771                 lcdshadow_on_off(lcdshadow_state);
9772 }
9773
9774 static int lcdshadow_read(struct seq_file *m)
9775 {
9776         if (lcdshadow_state < 0) {
9777                 seq_puts(m, "status:\t\tnot supported\n");
9778         } else {
9779                 seq_printf(m, "status:\t\t%d\n", lcdshadow_state);
9780                 seq_puts(m, "commands:\t0, 1\n");
9781         }
9782
9783         return 0;
9784 }
9785
9786 static int lcdshadow_write(char *buf)
9787 {
9788         char *cmd;
9789         int state = -1;
9790
9791         if (lcdshadow_state < 0)
9792                 return -ENODEV;
9793
9794         while ((cmd = next_cmd(&buf))) {
9795                 if (strlencmp(cmd, "0") == 0)
9796                         state = 0;
9797                 else if (strlencmp(cmd, "1") == 0)
9798                         state = 1;
9799         }
9800
9801         if (state == -1)
9802                 return -EINVAL;
9803
9804         return lcdshadow_set(state);
9805 }
9806
9807 static struct ibm_struct lcdshadow_driver_data = {
9808         .name = "lcdshadow",
9809         .resume = lcdshadow_resume,
9810         .read = lcdshadow_read,
9811         .write = lcdshadow_write,
9812 };
9813
9814 /****************************************************************************
9815  ****************************************************************************
9816  *
9817  * Infrastructure
9818  *
9819  ****************************************************************************
9820  ****************************************************************************/
9821
9822 /*
9823  * HKEY event callout for other subdrivers go here
9824  * (yes, it is ugly, but it is quick, safe, and gets the job done
9825  */
9826 static void tpacpi_driver_event(const unsigned int hkey_event)
9827 {
9828         if (ibm_backlight_device) {
9829                 switch (hkey_event) {
9830                 case TP_HKEY_EV_BRGHT_UP:
9831                 case TP_HKEY_EV_BRGHT_DOWN:
9832                         tpacpi_brightness_notify_change();
9833                 }
9834         }
9835         if (alsa_card) {
9836                 switch (hkey_event) {
9837                 case TP_HKEY_EV_VOL_UP:
9838                 case TP_HKEY_EV_VOL_DOWN:
9839                 case TP_HKEY_EV_VOL_MUTE:
9840                         volume_alsa_notify_change();
9841                 }
9842         }
9843         if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
9844                 enum led_brightness brightness;
9845
9846                 mutex_lock(&kbdlight_mutex);
9847
9848                 /*
9849                  * Check the brightness actually changed, setting the brightness
9850                  * through kbdlight_set_level() also triggers this event.
9851                  */
9852                 brightness = kbdlight_sysfs_get(NULL);
9853                 if (kbdlight_brightness != brightness) {
9854                         kbdlight_brightness = brightness;
9855                         led_classdev_notify_brightness_hw_changed(
9856                                 &tpacpi_led_kbdlight.led_classdev, brightness);
9857                 }
9858
9859                 mutex_unlock(&kbdlight_mutex);
9860         }
9861 }
9862
9863 static void hotkey_driver_event(const unsigned int scancode)
9864 {
9865         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
9866 }
9867
9868 /* --------------------------------------------------------------------- */
9869
9870 /* /proc support */
9871 static struct proc_dir_entry *proc_dir;
9872
9873 /*
9874  * Module and infrastructure proble, init and exit handling
9875  */
9876
9877 static bool force_load;
9878
9879 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
9880 static const char * __init str_supported(int is_supported)
9881 {
9882         static char text_unsupported[] __initdata = "not supported";
9883
9884         return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
9885 }
9886 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
9887
9888 static void ibm_exit(struct ibm_struct *ibm)
9889 {
9890         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
9891
9892         list_del_init(&ibm->all_drivers);
9893
9894         if (ibm->flags.acpi_notify_installed) {
9895                 dbg_printk(TPACPI_DBG_EXIT,
9896                         "%s: acpi_remove_notify_handler\n", ibm->name);
9897                 BUG_ON(!ibm->acpi);
9898                 acpi_remove_notify_handler(*ibm->acpi->handle,
9899                                            ibm->acpi->type,
9900                                            dispatch_acpi_notify);
9901                 ibm->flags.acpi_notify_installed = 0;
9902         }
9903
9904         if (ibm->flags.proc_created) {
9905                 dbg_printk(TPACPI_DBG_EXIT,
9906                         "%s: remove_proc_entry\n", ibm->name);
9907                 remove_proc_entry(ibm->name, proc_dir);
9908                 ibm->flags.proc_created = 0;
9909         }
9910
9911         if (ibm->flags.acpi_driver_registered) {
9912                 dbg_printk(TPACPI_DBG_EXIT,
9913                         "%s: acpi_bus_unregister_driver\n", ibm->name);
9914                 BUG_ON(!ibm->acpi);
9915                 acpi_bus_unregister_driver(ibm->acpi->driver);
9916                 kfree(ibm->acpi->driver);
9917                 ibm->acpi->driver = NULL;
9918                 ibm->flags.acpi_driver_registered = 0;
9919         }
9920
9921         if (ibm->flags.init_called && ibm->exit) {
9922                 ibm->exit();
9923                 ibm->flags.init_called = 0;
9924         }
9925
9926         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
9927 }
9928
9929 static int __init ibm_init(struct ibm_init_struct *iibm)
9930 {
9931         int ret;
9932         struct ibm_struct *ibm = iibm->data;
9933         struct proc_dir_entry *entry;
9934
9935         BUG_ON(ibm == NULL);
9936
9937         INIT_LIST_HEAD(&ibm->all_drivers);
9938
9939         if (ibm->flags.experimental && !experimental)
9940                 return 0;
9941
9942         dbg_printk(TPACPI_DBG_INIT,
9943                 "probing for %s\n", ibm->name);
9944
9945         if (iibm->init) {
9946                 ret = iibm->init(iibm);
9947                 if (ret > 0)
9948                         return 0;       /* probe failed */
9949                 if (ret)
9950                         return ret;
9951
9952                 ibm->flags.init_called = 1;
9953         }
9954
9955         if (ibm->acpi) {
9956                 if (ibm->acpi->hid) {
9957                         ret = register_tpacpi_subdriver(ibm);
9958                         if (ret)
9959                                 goto err_out;
9960                 }
9961
9962                 if (ibm->acpi->notify) {
9963                         ret = setup_acpi_notify(ibm);
9964                         if (ret == -ENODEV) {
9965                                 pr_notice("disabling subdriver %s\n",
9966                                           ibm->name);
9967                                 ret = 0;
9968                                 goto err_out;
9969                         }
9970                         if (ret < 0)
9971                                 goto err_out;
9972                 }
9973         }
9974
9975         dbg_printk(TPACPI_DBG_INIT,
9976                 "%s installed\n", ibm->name);
9977
9978         if (ibm->read) {
9979                 umode_t mode = iibm->base_procfs_mode;
9980
9981                 if (!mode)
9982                         mode = S_IRUGO;
9983                 if (ibm->write)
9984                         mode |= S_IWUSR;
9985                 entry = proc_create_data(ibm->name, mode, proc_dir,
9986                                          &dispatch_proc_ops, ibm);
9987                 if (!entry) {
9988                         pr_err("unable to create proc entry %s\n", ibm->name);
9989                         ret = -ENODEV;
9990                         goto err_out;
9991                 }
9992                 ibm->flags.proc_created = 1;
9993         }
9994
9995         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
9996
9997         return 0;
9998
9999 err_out:
10000         dbg_printk(TPACPI_DBG_INIT,
10001                 "%s: at error exit path with result %d\n",
10002                 ibm->name, ret);
10003
10004         ibm_exit(ibm);
10005         return (ret < 0) ? ret : 0;
10006 }
10007
10008 /* Probing */
10009
10010 static char __init tpacpi_parse_fw_id(const char * const s,
10011                                       u32 *model, u16 *release)
10012 {
10013         int i;
10014
10015         if (!s || strlen(s) < 8)
10016                 goto invalid;
10017
10018         for (i = 0; i < 8; i++)
10019                 if (!((s[i] >= '0' && s[i] <= '9') ||
10020                       (s[i] >= 'A' && s[i] <= 'Z')))
10021                         goto invalid;
10022
10023         /*
10024          * Most models: xxyTkkWW (#.##c)
10025          * Ancient 570/600 and -SL lacks (#.##c)
10026          */
10027         if (s[3] == 'T' || s[3] == 'N') {
10028                 *model = TPID(s[0], s[1]);
10029                 *release = TPVER(s[4], s[5]);
10030                 return s[2];
10031
10032         /* New models: xxxyTkkW (#.##c); T550 and some others */
10033         } else if (s[4] == 'T' || s[4] == 'N') {
10034                 *model = TPID3(s[0], s[1], s[2]);
10035                 *release = TPVER(s[5], s[6]);
10036                 return s[3];
10037         }
10038
10039 invalid:
10040         return '\0';
10041 }
10042
10043 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
10044 {
10045         char *ec_fw_string = (char *) private;
10046         const char *dmi_data = (const char *)dm;
10047         /*
10048          * ThinkPad Embedded Controller Program Table on newer models
10049          *
10050          * Offset |  Name                | Width  | Description
10051          * ----------------------------------------------------
10052          *  0x00  | Type                 | BYTE   | 0x8C
10053          *  0x01  | Length               | BYTE   |
10054          *  0x02  | Handle               | WORD   | Varies
10055          *  0x04  | Signature            | BYTEx6 | ASCII for "LENOVO"
10056          *  0x0A  | OEM struct offset    | BYTE   | 0x0B
10057          *  0x0B  | OEM struct number    | BYTE   | 0x07, for this structure
10058          *  0x0C  | OEM struct revision  | BYTE   | 0x01, for this format
10059          *  0x0D  | ECP version ID       | STR ID |
10060          *  0x0E  | ECP release date     | STR ID |
10061          */
10062
10063         /* Return if data structure not match */
10064         if (dm->type != 140 || dm->length < 0x0F ||
10065         memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
10066         dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
10067         dmi_data[0x0C] != 0x01)
10068                 return;
10069
10070         /* fwstr is the first 8byte string  */
10071         strncpy(ec_fw_string, dmi_data + 0x0F, 8);
10072 }
10073
10074 /* returns 0 - probe ok, or < 0 - probe error.
10075  * Probe ok doesn't mean thinkpad found.
10076  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
10077 static int __must_check __init get_thinkpad_model_data(
10078                                                 struct thinkpad_id_data *tp)
10079 {
10080         const struct dmi_device *dev = NULL;
10081         char ec_fw_string[18] = {0};
10082         char const *s;
10083         char t;
10084
10085         if (!tp)
10086                 return -EINVAL;
10087
10088         memset(tp, 0, sizeof(*tp));
10089
10090         if (dmi_name_in_vendors("IBM"))
10091                 tp->vendor = PCI_VENDOR_ID_IBM;
10092         else if (dmi_name_in_vendors("LENOVO"))
10093                 tp->vendor = PCI_VENDOR_ID_LENOVO;
10094         else
10095                 return 0;
10096
10097         s = dmi_get_system_info(DMI_BIOS_VERSION);
10098         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
10099         if (s && !tp->bios_version_str)
10100                 return -ENOMEM;
10101
10102         /* Really ancient ThinkPad 240X will fail this, which is fine */
10103         t = tpacpi_parse_fw_id(tp->bios_version_str,
10104                                &tp->bios_model, &tp->bios_release);
10105         if (t != 'E' && t != 'C')
10106                 return 0;
10107
10108         /*
10109          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
10110          * X32 or newer, all Z series;  Some models must have an
10111          * up-to-date BIOS or they will not be detected.
10112          *
10113          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
10114          */
10115         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
10116                 if (sscanf(dev->name,
10117                            "IBM ThinkPad Embedded Controller -[%17c",
10118                            ec_fw_string) == 1) {
10119                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
10120                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
10121                         break;
10122                 }
10123         }
10124
10125         /* Newer ThinkPads have different EC program info table */
10126         if (!ec_fw_string[0])
10127                 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
10128
10129         if (ec_fw_string[0]) {
10130                 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
10131                 if (!tp->ec_version_str)
10132                         return -ENOMEM;
10133
10134                 t = tpacpi_parse_fw_id(ec_fw_string,
10135                          &tp->ec_model, &tp->ec_release);
10136                 if (t != 'H') {
10137                         pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
10138                                   ec_fw_string);
10139                         pr_notice("please report this to %s\n", TPACPI_MAIL);
10140                 }
10141         }
10142
10143         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
10144         if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
10145                 tp->model_str = kstrdup(s, GFP_KERNEL);
10146                 if (!tp->model_str)
10147                         return -ENOMEM;
10148         } else {
10149                 s = dmi_get_system_info(DMI_BIOS_VENDOR);
10150                 if (s && !(strncasecmp(s, "Lenovo", 6))) {
10151                         tp->model_str = kstrdup(s, GFP_KERNEL);
10152                         if (!tp->model_str)
10153                                 return -ENOMEM;
10154                 }
10155         }
10156
10157         s = dmi_get_system_info(DMI_PRODUCT_NAME);
10158         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
10159         if (s && !tp->nummodel_str)
10160                 return -ENOMEM;
10161
10162         return 0;
10163 }
10164
10165 static int __init probe_for_thinkpad(void)
10166 {
10167         int is_thinkpad;
10168
10169         if (acpi_disabled)
10170                 return -ENODEV;
10171
10172         /* It would be dangerous to run the driver in this case */
10173         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
10174                 return -ENODEV;
10175
10176         /*
10177          * Non-ancient models have better DMI tagging, but very old models
10178          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
10179          */
10180         is_thinkpad = (thinkpad_id.model_str != NULL) ||
10181                       (thinkpad_id.ec_model != 0) ||
10182                       tpacpi_is_fw_known();
10183
10184         /* The EC handler is required */
10185         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
10186         if (!ec_handle) {
10187                 if (is_thinkpad)
10188                         pr_err("Not yet supported ThinkPad detected!\n");
10189                 return -ENODEV;
10190         }
10191
10192         if (!is_thinkpad && !force_load)
10193                 return -ENODEV;
10194
10195         return 0;
10196 }
10197
10198 static void __init thinkpad_acpi_init_banner(void)
10199 {
10200         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
10201         pr_info("%s\n", TPACPI_URL);
10202
10203         pr_info("ThinkPad BIOS %s, EC %s\n",
10204                 (thinkpad_id.bios_version_str) ?
10205                         thinkpad_id.bios_version_str : "unknown",
10206                 (thinkpad_id.ec_version_str) ?
10207                         thinkpad_id.ec_version_str : "unknown");
10208
10209         BUG_ON(!thinkpad_id.vendor);
10210
10211         if (thinkpad_id.model_str)
10212                 pr_info("%s %s, model %s\n",
10213                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
10214                                 "IBM" : ((thinkpad_id.vendor ==
10215                                                 PCI_VENDOR_ID_LENOVO) ?
10216                                         "Lenovo" : "Unknown vendor"),
10217                         thinkpad_id.model_str,
10218                         (thinkpad_id.nummodel_str) ?
10219                                 thinkpad_id.nummodel_str : "unknown");
10220 }
10221
10222 /* Module init, exit, parameters */
10223
10224 static struct ibm_init_struct ibms_init[] __initdata = {
10225         {
10226                 .data = &thinkpad_acpi_driver_data,
10227         },
10228         {
10229                 .init = hotkey_init,
10230                 .data = &hotkey_driver_data,
10231         },
10232         {
10233                 .init = bluetooth_init,
10234                 .data = &bluetooth_driver_data,
10235         },
10236         {
10237                 .init = wan_init,
10238                 .data = &wan_driver_data,
10239         },
10240         {
10241                 .init = uwb_init,
10242                 .data = &uwb_driver_data,
10243         },
10244 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
10245         {
10246                 .init = video_init,
10247                 .base_procfs_mode = S_IRUSR,
10248                 .data = &video_driver_data,
10249         },
10250 #endif
10251         {
10252                 .init = kbdlight_init,
10253                 .data = &kbdlight_driver_data,
10254         },
10255         {
10256                 .init = light_init,
10257                 .data = &light_driver_data,
10258         },
10259         {
10260                 .init = cmos_init,
10261                 .data = &cmos_driver_data,
10262         },
10263         {
10264                 .init = led_init,
10265                 .data = &led_driver_data,
10266         },
10267         {
10268                 .init = beep_init,
10269                 .data = &beep_driver_data,
10270         },
10271         {
10272                 .init = thermal_init,
10273                 .data = &thermal_driver_data,
10274         },
10275         {
10276                 .init = brightness_init,
10277                 .data = &brightness_driver_data,
10278         },
10279         {
10280                 .init = volume_init,
10281                 .data = &volume_driver_data,
10282         },
10283         {
10284                 .init = fan_init,
10285                 .data = &fan_driver_data,
10286         },
10287         {
10288                 .init = mute_led_init,
10289                 .data = &mute_led_driver_data,
10290         },
10291         {
10292                 .init = tpacpi_battery_init,
10293                 .data = &battery_driver_data,
10294         },
10295         {
10296                 .init = tpacpi_lcdshadow_init,
10297                 .data = &lcdshadow_driver_data,
10298         },
10299 };
10300
10301 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
10302 {
10303         unsigned int i;
10304         struct ibm_struct *ibm;
10305
10306         if (!kp || !kp->name || !val)
10307                 return -EINVAL;
10308
10309         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10310                 ibm = ibms_init[i].data;
10311                 WARN_ON(ibm == NULL);
10312
10313                 if (!ibm || !ibm->name)
10314                         continue;
10315
10316                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
10317                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
10318                                 return -ENOSPC;
10319                         strcpy(ibms_init[i].param, val);
10320                         strcat(ibms_init[i].param, ",");
10321                         return 0;
10322                 }
10323         }
10324
10325         return -EINVAL;
10326 }
10327
10328 module_param(experimental, int, 0444);
10329 MODULE_PARM_DESC(experimental,
10330                  "Enables experimental features when non-zero");
10331
10332 module_param_named(debug, dbg_level, uint, 0);
10333 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
10334
10335 module_param(force_load, bool, 0444);
10336 MODULE_PARM_DESC(force_load,
10337                  "Attempts to load the driver even on a mis-identified ThinkPad when true");
10338
10339 module_param_named(fan_control, fan_control_allowed, bool, 0444);
10340 MODULE_PARM_DESC(fan_control,
10341                  "Enables setting fan parameters features when true");
10342
10343 module_param_named(brightness_mode, brightness_mode, uint, 0444);
10344 MODULE_PARM_DESC(brightness_mode,
10345                  "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
10346
10347 module_param(brightness_enable, uint, 0444);
10348 MODULE_PARM_DESC(brightness_enable,
10349                  "Enables backlight control when 1, disables when 0");
10350
10351 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
10352 module_param_named(volume_mode, volume_mode, uint, 0444);
10353 MODULE_PARM_DESC(volume_mode,
10354                  "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
10355
10356 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
10357 MODULE_PARM_DESC(volume_capabilities,
10358                  "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
10359
10360 module_param_named(volume_control, volume_control_allowed, bool, 0444);
10361 MODULE_PARM_DESC(volume_control,
10362                  "Enables software override for the console audio control when true");
10363
10364 module_param_named(software_mute, software_mute_requested, bool, 0444);
10365 MODULE_PARM_DESC(software_mute,
10366                  "Request full software mute control");
10367
10368 /* ALSA module API parameters */
10369 module_param_named(index, alsa_index, int, 0444);
10370 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
10371 module_param_named(id, alsa_id, charp, 0444);
10372 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
10373 module_param_named(enable, alsa_enable, bool, 0444);
10374 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
10375 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
10376
10377 /* The module parameter can't be read back, that's why 0 is used here */
10378 #define TPACPI_PARAM(feature) \
10379         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
10380         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
10381
10382 TPACPI_PARAM(hotkey);
10383 TPACPI_PARAM(bluetooth);
10384 TPACPI_PARAM(video);
10385 TPACPI_PARAM(light);
10386 TPACPI_PARAM(cmos);
10387 TPACPI_PARAM(led);
10388 TPACPI_PARAM(beep);
10389 TPACPI_PARAM(brightness);
10390 TPACPI_PARAM(volume);
10391 TPACPI_PARAM(fan);
10392
10393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10394 module_param(dbg_wlswemul, uint, 0444);
10395 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
10396 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
10397 MODULE_PARM_DESC(wlsw_state,
10398                  "Initial state of the emulated WLSW switch");
10399
10400 module_param(dbg_bluetoothemul, uint, 0444);
10401 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
10402 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
10403 MODULE_PARM_DESC(bluetooth_state,
10404                  "Initial state of the emulated bluetooth switch");
10405
10406 module_param(dbg_wwanemul, uint, 0444);
10407 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
10408 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
10409 MODULE_PARM_DESC(wwan_state,
10410                  "Initial state of the emulated WWAN switch");
10411
10412 module_param(dbg_uwbemul, uint, 0444);
10413 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
10414 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
10415 MODULE_PARM_DESC(uwb_state,
10416                  "Initial state of the emulated UWB switch");
10417 #endif
10418
10419 static void thinkpad_acpi_module_exit(void)
10420 {
10421         struct ibm_struct *ibm, *itmp;
10422
10423         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
10424
10425         list_for_each_entry_safe_reverse(ibm, itmp,
10426                                          &tpacpi_all_drivers,
10427                                          all_drivers) {
10428                 ibm_exit(ibm);
10429         }
10430
10431         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
10432
10433         if (tpacpi_inputdev) {
10434                 if (tp_features.input_device_registered)
10435                         input_unregister_device(tpacpi_inputdev);
10436                 else
10437                         input_free_device(tpacpi_inputdev);
10438                 kfree(hotkey_keycode_map);
10439         }
10440
10441         if (tpacpi_hwmon)
10442                 hwmon_device_unregister(tpacpi_hwmon);
10443
10444         if (tpacpi_sensors_pdev)
10445                 platform_device_unregister(tpacpi_sensors_pdev);
10446         if (tpacpi_pdev)
10447                 platform_device_unregister(tpacpi_pdev);
10448
10449         if (tp_features.sensors_pdrv_attrs_registered)
10450                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
10451         if (tp_features.platform_drv_attrs_registered)
10452                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
10453
10454         if (tp_features.sensors_pdrv_registered)
10455                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
10456
10457         if (tp_features.platform_drv_registered)
10458                 platform_driver_unregister(&tpacpi_pdriver);
10459
10460         if (proc_dir)
10461                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
10462
10463         if (tpacpi_wq)
10464                 destroy_workqueue(tpacpi_wq);
10465
10466         kfree(thinkpad_id.bios_version_str);
10467         kfree(thinkpad_id.ec_version_str);
10468         kfree(thinkpad_id.model_str);
10469         kfree(thinkpad_id.nummodel_str);
10470 }
10471
10472
10473 static int __init thinkpad_acpi_module_init(void)
10474 {
10475         int ret, i;
10476
10477         tpacpi_lifecycle = TPACPI_LIFE_INIT;
10478
10479         /* Driver-level probe */
10480
10481         ret = get_thinkpad_model_data(&thinkpad_id);
10482         if (ret) {
10483                 pr_err("unable to get DMI data: %d\n", ret);
10484                 thinkpad_acpi_module_exit();
10485                 return ret;
10486         }
10487         ret = probe_for_thinkpad();
10488         if (ret) {
10489                 thinkpad_acpi_module_exit();
10490                 return ret;
10491         }
10492
10493         /* Driver initialization */
10494
10495         thinkpad_acpi_init_banner();
10496         tpacpi_check_outdated_fw();
10497
10498         TPACPI_ACPIHANDLE_INIT(ecrd);
10499         TPACPI_ACPIHANDLE_INIT(ecwr);
10500
10501         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
10502         if (!tpacpi_wq) {
10503                 thinkpad_acpi_module_exit();
10504                 return -ENOMEM;
10505         }
10506
10507         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
10508         if (!proc_dir) {
10509                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
10510                 thinkpad_acpi_module_exit();
10511                 return -ENODEV;
10512         }
10513
10514         ret = platform_driver_register(&tpacpi_pdriver);
10515         if (ret) {
10516                 pr_err("unable to register main platform driver\n");
10517                 thinkpad_acpi_module_exit();
10518                 return ret;
10519         }
10520         tp_features.platform_drv_registered = 1;
10521
10522         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
10523         if (ret) {
10524                 pr_err("unable to register hwmon platform driver\n");
10525                 thinkpad_acpi_module_exit();
10526                 return ret;
10527         }
10528         tp_features.sensors_pdrv_registered = 1;
10529
10530         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
10531         if (!ret) {
10532                 tp_features.platform_drv_attrs_registered = 1;
10533                 ret = tpacpi_create_driver_attributes(
10534                                         &tpacpi_hwmon_pdriver.driver);
10535         }
10536         if (ret) {
10537                 pr_err("unable to create sysfs driver attributes\n");
10538                 thinkpad_acpi_module_exit();
10539                 return ret;
10540         }
10541         tp_features.sensors_pdrv_attrs_registered = 1;
10542
10543
10544         /* Device initialization */
10545         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
10546                                                         NULL, 0);
10547         if (IS_ERR(tpacpi_pdev)) {
10548                 ret = PTR_ERR(tpacpi_pdev);
10549                 tpacpi_pdev = NULL;
10550                 pr_err("unable to register platform device\n");
10551                 thinkpad_acpi_module_exit();
10552                 return ret;
10553         }
10554         tpacpi_sensors_pdev = platform_device_register_simple(
10555                                                 TPACPI_HWMON_DRVR_NAME,
10556                                                 -1, NULL, 0);
10557         if (IS_ERR(tpacpi_sensors_pdev)) {
10558                 ret = PTR_ERR(tpacpi_sensors_pdev);
10559                 tpacpi_sensors_pdev = NULL;
10560                 pr_err("unable to register hwmon platform device\n");
10561                 thinkpad_acpi_module_exit();
10562                 return ret;
10563         }
10564         tp_features.sensors_pdev_attrs_registered = 1;
10565         tpacpi_hwmon = hwmon_device_register_with_groups(
10566                 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
10567
10568         if (IS_ERR(tpacpi_hwmon)) {
10569                 ret = PTR_ERR(tpacpi_hwmon);
10570                 tpacpi_hwmon = NULL;
10571                 pr_err("unable to register hwmon device\n");
10572                 thinkpad_acpi_module_exit();
10573                 return ret;
10574         }
10575         mutex_init(&tpacpi_inputdev_send_mutex);
10576         tpacpi_inputdev = input_allocate_device();
10577         if (!tpacpi_inputdev) {
10578                 thinkpad_acpi_module_exit();
10579                 return -ENOMEM;
10580         } else {
10581                 /* Prepare input device, but don't register */
10582                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
10583                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
10584                 tpacpi_inputdev->id.bustype = BUS_HOST;
10585                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
10586                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
10587                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
10588                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
10589         }
10590
10591         /* Init subdriver dependencies */
10592         tpacpi_detect_brightness_capabilities();
10593
10594         /* Init subdrivers */
10595         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10596                 ret = ibm_init(&ibms_init[i]);
10597                 if (ret >= 0 && *ibms_init[i].param)
10598                         ret = ibms_init[i].data->write(ibms_init[i].param);
10599                 if (ret < 0) {
10600                         thinkpad_acpi_module_exit();
10601                         return ret;
10602                 }
10603         }
10604
10605         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
10606
10607         ret = input_register_device(tpacpi_inputdev);
10608         if (ret < 0) {
10609                 pr_err("unable to register input device\n");
10610                 thinkpad_acpi_module_exit();
10611                 return ret;
10612         } else {
10613                 tp_features.input_device_registered = 1;
10614         }
10615
10616         return 0;
10617 }
10618
10619 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
10620
10621 /*
10622  * This will autoload the driver in almost every ThinkPad
10623  * in widespread use.
10624  *
10625  * Only _VERY_ old models, like the 240, 240x and 570 lack
10626  * the HKEY event interface.
10627  */
10628 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
10629
10630 /*
10631  * DMI matching for module autoloading
10632  *
10633  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
10634  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
10635  *
10636  * Only models listed in thinkwiki will be supported, so add yours
10637  * if it is not there yet.
10638  */
10639 #define IBM_BIOS_MODULE_ALIAS(__type) \
10640         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
10641
10642 /* Ancient thinkpad BIOSes have to be identified by
10643  * BIOS type or model number, and there are far less
10644  * BIOS types than model numbers... */
10645 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
10646
10647 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
10648 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
10649 MODULE_DESCRIPTION(TPACPI_DESC);
10650 MODULE_VERSION(TPACPI_VERSION);
10651 MODULE_LICENSE("GPL");
10652
10653 module_init(thinkpad_acpi_module_init);
10654 module_exit(thinkpad_acpi_module_exit);