drivers/platform/x86/panasonic-laptop.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Panasonic HotKey and LCD brightness control driver
   4  *  (C) 2004 Hiroshi Miura <miura@da-cha.org>
   5  *  (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
   6  *  (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
   7  *  (C) 2004 David Bronaugh <dbronaugh>
   8  *  (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
   9  *
  10  *  derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
  11  *
  12  *---------------------------------------------------------------------------
  13  *
  14  * ChangeLog:
  15  *      Aug.18, 2020    Kenneth Chan <kenneth.t.chan@gmail.com>
  16  *              -v0.98  add platform devices for firmware brightness registers
  17  *                      add support for battery charging threshold (eco mode)
  18  *                      resolve hotkey double trigger
  19  *                      add write support to mute
  20  *                      fix sticky_key init bug
  21  *                      fix naming of platform files for consistency with other
  22  *                      modules
  23  *                      split MODULE_AUTHOR() by one author per macro call
  24  *                      replace ACPI prints with pr_*() macros
  25  *              -v0.97  add support for cdpower hardware switch
  26  *              -v0.96  merge Lucina's enhancement
  27  *                      Jan.13, 2009 Martin Lucina <mato@kotelna.sk>
  28  *                              - add support for optical driver power in
  29  *                                Y and W series
  30  *
  31  *      Sep.23, 2008    Harald Welte <laforge@gnumonks.org>
  32  *              -v0.95  rename driver from drivers/acpi/pcc_acpi.c to
  33  *                      drivers/misc/panasonic-laptop.c
  34  *
  35  *      Jul.04, 2008    Harald Welte <laforge@gnumonks.org>
  36  *              -v0.94  replace /proc interface with device attributes
  37  *                      support {set,get}keycode on th input device
  38  *
  39  *      Jun.27, 2008    Harald Welte <laforge@gnumonks.org>
  40  *              -v0.92  merge with 2.6.26-rc6 input API changes
  41  *                      remove broken <= 2.6.15 kernel support
  42  *                      resolve all compiler warnings
  43  *                      various coding style fixes (checkpatch.pl)
  44  *                      add support for backlight api
  45  *                      major code restructuring
  46  *
  47  *      Dac.28, 2007    Harald Welte <laforge@gnumonks.org>
  48  *              -v0.91  merge with 2.6.24-rc6 ACPI changes
  49  *
  50  *      Nov.04, 2006    Hiroshi Miura <miura@da-cha.org>
  51  *              -v0.9   remove warning about section reference.
  52  *                      remove acpi_os_free
  53  *                      add /proc/acpi/pcc/brightness interface for HAL access
  54  *                      merge dbronaugh's enhancement
  55  *                      Aug.17, 2004 David Bronaugh (dbronaugh)
  56  *                              - Added screen brightness setting interface
  57  *                                Thanks to FreeBSD crew (acpi_panasonic.c)
  58  *                                for the ideas I needed to accomplish it
  59  *
  60  *      May.29, 2006    Hiroshi Miura <miura@da-cha.org>
  61  *              -v0.8.4 follow to change keyinput structure
  62  *                      thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
  63  *                      Jacob Bower <jacob.bower@ic.ac.uk> and
  64  *                      Hiroshi Yokota for providing solutions.
  65  *
  66  *      Oct.02, 2004    Hiroshi Miura <miura@da-cha.org>
  67  *              -v0.8.2 merge code of YOKOTA Hiroshi
  68  *                                      <yokota@netlab.is.tsukuba.ac.jp>.
  69  *                      Add sticky key mode interface.
  70  *                      Refactoring acpi_pcc_generate_keyinput().
  71  *
  72  *      Sep.15, 2004    Hiroshi Miura <miura@da-cha.org>
  73  *              -v0.8   Generate key input event on input subsystem.
  74  *                      This is based on yet another driver written by
  75  *                                                      Ryuta Nakanishi.
  76  *
  77  *      Sep.10, 2004    Hiroshi Miura <miura@da-cha.org>
  78  *              -v0.7   Change proc interface functions using seq_file
  79  *                      facility as same as other ACPI drivers.
  80  *
  81  *      Aug.28, 2004    Hiroshi Miura <miura@da-cha.org>
  82  *              -v0.6.4 Fix a silly error with status checking
  83  *
  84  *      Aug.25, 2004    Hiroshi Miura <miura@da-cha.org>
  85  *              -v0.6.3 replace read_acpi_int by standard function
  86  *                                                      acpi_evaluate_integer
  87  *                      some clean up and make smart copyright notice.
  88  *                      fix return value of pcc_acpi_get_key()
  89  *                      fix checking return value of acpi_bus_register_driver()
  90  *
  91  *      Aug.22, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
  92  *              -v0.6.2 Add check on ACPI data (num_sifr)
  93  *                      Coding style cleanups, better error messages/handling
  94  *                      Fixed an off-by-one error in memory allocation
  95  *
  96  *      Aug.21, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
  97  *              -v0.6.1 Fix a silly error with status checking
  98  *
  99  *      Aug.20, 2004    David Bronaugh <dbronaugh@linuxboxen.org>
 100  *              - v0.6  Correct brightness controls to reflect reality
 101  *                      based on information gleaned by Hiroshi Miura
 102  *                      and discussions with Hiroshi Miura
 103  *
 104  *      Aug.10, 2004    Hiroshi Miura <miura@da-cha.org>
 105  *              - v0.5  support LCD brightness control
 106  *                      based on the disclosed information by MEI.
 107  *
 108  *      Jul.25, 2004    Hiroshi Miura <miura@da-cha.org>
 109  *              - v0.4  first post version
 110  *                      add function to retrive SIFR
 111  *
 112  *      Jul.24, 2004    Hiroshi Miura <miura@da-cha.org>
 113  *              - v0.3  get proper status of hotkey
 114  *
 115  *      Jul.22, 2004    Hiroshi Miura <miura@da-cha.org>
 116  *              - v0.2  add HotKey handler
 117  *
 118  *      Jul.17, 2004    Hiroshi Miura <miura@da-cha.org>
 119  *              - v0.1  start from toshiba_acpi driver written by John Belmonte
 120  */
 121
 122 #include <linux/kernel.h>
 123 #include <linux/module.h>
 124 #include <linux/init.h>
 125 #include <linux/types.h>
 126 #include <linux/backlight.h>
 127 #include <linux/ctype.h>
 128 #include <linux/seq_file.h>
 129 #include <linux/uaccess.h>
 130 #include <linux/slab.h>
 131 #include <linux/acpi.h>
 132 #include <linux/input.h>
 133 #include <linux/input/sparse-keymap.h>
 134 #include <linux/platform_device.h>
 135
 136
 137 MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
 138 MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
 139 MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
 140 MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>");
 141 MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>");
 142 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
 143 MODULE_LICENSE("GPL");
 144
 145 #define LOGPREFIX "pcc_acpi: "
 146
 147 /* Define ACPI PATHs */
 148 /* Lets note hotkeys */
 149 #define METHOD_HKEY_QUERY       "HINF"
 150 #define METHOD_HKEY_SQTY        "SQTY"
 151 #define METHOD_HKEY_SINF        "SINF"
 152 #define METHOD_HKEY_SSET        "SSET"
 153 #define METHOD_ECWR             "\\_SB.ECWR"
 154 #define HKEY_NOTIFY             0x80
 155 #define ECO_MODE_OFF            0x00
 156 #define ECO_MODE_ON             0x80
 157
 158 #define ACPI_PCC_DRIVER_NAME    "Panasonic Laptop Support"
 159 #define ACPI_PCC_DEVICE_NAME    "Hotkey"
 160 #define ACPI_PCC_CLASS          "pcc"
 161
 162 #define ACPI_PCC_INPUT_PHYS     "panasonic/hkey0"
 163
 164 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
 165    ECO_MODEs: 0x03 = off, 0x83 = on
 166 */
 167 enum SINF_BITS { SINF_NUM_BATTERIES = 0,
 168                  SINF_LCD_TYPE,
 169                  SINF_AC_MAX_BRIGHT,
 170                  SINF_AC_MIN_BRIGHT,
 171                  SINF_AC_CUR_BRIGHT,
 172                  SINF_DC_MAX_BRIGHT,
 173                  SINF_DC_MIN_BRIGHT,
 174                  SINF_DC_CUR_BRIGHT,
 175                  SINF_MUTE,
 176                  SINF_RESERVED,
 177                  SINF_ECO_MODE = 0x0A,
 178                  SINF_CUR_BRIGHT = 0x0D,
 179                  SINF_STICKY_KEY = 0x80,
 180         };
 181 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
 182
 183 static int acpi_pcc_hotkey_add(struct acpi_device *device);
 184 static int acpi_pcc_hotkey_remove(struct acpi_device *device);
 185 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
 186
 187 static const struct acpi_device_id pcc_device_ids[] = {
 188         { "MAT0012", 0},
 189         { "MAT0013", 0},
 190         { "MAT0018", 0},
 191         { "MAT0019", 0},
 192         { "", 0},
 193 };
 194 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
 195
 196 #ifdef CONFIG_PM_SLEEP
 197 static int acpi_pcc_hotkey_resume(struct device *dev);
 198 #endif
 199 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
 200
 201 static struct acpi_driver acpi_pcc_driver = {
 202         .name =         ACPI_PCC_DRIVER_NAME,
 203         .class =        ACPI_PCC_CLASS,
 204         .ids =          pcc_device_ids,
 205         .ops =          {
 206                                 .add =          acpi_pcc_hotkey_add,
 207                                 .remove =       acpi_pcc_hotkey_remove,
 208                                 .notify =       acpi_pcc_hotkey_notify,
 209                         },
 210         .drv.pm =       &acpi_pcc_hotkey_pm,
 211 };
 212
 213 static const struct key_entry panasonic_keymap[] = {
 214         { KE_KEY, 0, { KEY_RESERVED } },
 215         { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
 216         { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
 217         { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
 218         { KE_KEY, 4, { KEY_MUTE } },
 219         { KE_KEY, 5, { KEY_VOLUMEDOWN } },
 220         { KE_KEY, 6, { KEY_VOLUMEUP } },
 221         { KE_KEY, 7, { KEY_SLEEP } },
 222         { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
 223         { KE_KEY, 9, { KEY_BATTERY } },
 224         { KE_KEY, 10, { KEY_SUSPEND } },
 225         { KE_END, 0 }
 226 };
 227
 228 struct pcc_acpi {
 229         acpi_handle             handle;
 230         unsigned long           num_sifr;
 231         int                     sticky_key;
 232         int                     eco_mode;
 233         int                     mute;
 234         int                     ac_brightness;
 235         int                     dc_brightness;
 236         int                     current_brightness;
 237         u32                     *sinf;
 238         struct acpi_device      *device;
 239         struct input_dev        *input_dev;
 240         struct backlight_device *backlight;
 241         struct platform_device  *platform;
 242 };
 243
 244 /* method access functions */
 245 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
 246 {
 247         union acpi_object in_objs[] = {
 248                 { .integer.type  = ACPI_TYPE_INTEGER,
 249                   .integer.value = func, },
 250                 { .integer.type  = ACPI_TYPE_INTEGER,
 251                   .integer.value = val, },
 252         };
 253         struct acpi_object_list params = {
 254                 .count   = ARRAY_SIZE(in_objs),
 255                 .pointer = in_objs,
 256         };
 257         acpi_status status = AE_OK;
 258
 259         status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
 260                                       &params, NULL);
 261
 262         return (status == AE_OK) ? 0 : -EIO;
 263 }
 264
 265 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
 266 {
 267         unsigned long long s;
 268         acpi_status status;
 269
 270         status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
 271                                        NULL, &s);
 272         if (ACPI_SUCCESS(status))
 273                 return s;
 274         else {
 275                 pr_err("evaluation error HKEY.SQTY\n");
 276                 return -EINVAL;
 277         }
 278 }
 279
 280 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
 281 {
 282         acpi_status status;
 283         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 284         union acpi_object *hkey = NULL;
 285         int i;
 286
 287         status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
 288                                       &buffer);
 289         if (ACPI_FAILURE(status)) {
 290                 pr_err("evaluation error HKEY.SINF\n");
 291                 return 0;
 292         }
 293
 294         hkey = buffer.pointer;
 295         if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
 296                 pr_err("Invalid HKEY.SINF\n");
 297                 status = AE_ERROR;
 298                 goto end;
 299         }
 300
 301         if (pcc->num_sifr < hkey->package.count) {
 302                 pr_err("SQTY reports bad SINF length\n");
 303                 status = AE_ERROR;
 304                 goto end;
 305         }
 306
 307         for (i = 0; i < hkey->package.count; i++) {
 308                 union acpi_object *element = &(hkey->package.elements[i]);
 309                 if (likely(element->type == ACPI_TYPE_INTEGER)) {
 310                         pcc->sinf[i] = element->integer.value;
 311                 } else
 312                         pr_err("Invalid HKEY.SINF data\n");
 313         }
 314         pcc->sinf[hkey->package.count] = -1;
 315
 316 end:
 317         kfree(buffer.pointer);
 318         return status == AE_OK;
 319 }
 320
 321 /* backlight API interface functions */
 322
 323 /* This driver currently treats AC and DC brightness identical,
 324  * since we don't need to invent an interface to the core ACPI
 325  * logic to receive events in case a power supply is plugged in
 326  * or removed */
 327
 328 static int bl_get(struct backlight_device *bd)
 329 {
 330         struct pcc_acpi *pcc = bl_get_data(bd);
 331
 332         if (!acpi_pcc_retrieve_biosdata(pcc))
 333                 return -EIO;
 334
 335         return pcc->sinf[SINF_AC_CUR_BRIGHT];
 336 }
 337
 338 static int bl_set_status(struct backlight_device *bd)
 339 {
 340         struct pcc_acpi *pcc = bl_get_data(bd);
 341         int bright = bd->props.brightness;
 342         int rc;
 343
 344         if (!acpi_pcc_retrieve_biosdata(pcc))
 345                 return -EIO;
 346
 347         if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
 348                 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
 349
 350         if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
 351                 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
 352
 353         if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
 354             bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
 355                 return -EINVAL;
 356
 357         rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
 358         if (rc < 0)
 359                 return rc;
 360
 361         return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
 362 }
 363
 364 static const struct backlight_ops pcc_backlight_ops = {
 365         .get_brightness = bl_get,
 366         .update_status  = bl_set_status,
 367 };
 368
 369
 370 /* returns ACPI_SUCCESS if methods to control optical drive are present */
 371
 372 static acpi_status check_optd_present(void)
 373 {
 374         acpi_status status = AE_OK;
 375         acpi_handle handle;
 376
 377         status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
 378         if (ACPI_FAILURE(status))
 379                 goto out;
 380         status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
 381         if (ACPI_FAILURE(status))
 382                 goto out;
 383         status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
 384         if (ACPI_FAILURE(status))
 385                 goto out;
 386
 387 out:
 388         return status;
 389 }
 390
 391 /* get optical driver power state */
 392
 393 static int get_optd_power_state(void)
 394 {
 395         acpi_status status;
 396         unsigned long long state;
 397         int result;
 398
 399         status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
 400         if (ACPI_FAILURE(status)) {
 401                 pr_err("evaluation error _SB.STAT\n");
 402                 result = -EIO;
 403                 goto out;
 404         }
 405         switch (state) {
 406         case 0: /* power off */
 407                 result = 0;
 408                 break;
 409         case 0x0f: /* power on */
 410                 result = 1;
 411                 break;
 412         default:
 413                 result = -EIO;
 414                 break;
 415         }
 416
 417 out:
 418         return result;
 419 }
 420
 421 /* set optical drive power state */
 422
 423 static int set_optd_power_state(int new_state)
 424 {
 425         int result;
 426         acpi_status status;
 427
 428         result = get_optd_power_state();
 429         if (result < 0)
 430                 goto out;
 431         if (new_state == result)
 432                 goto out;
 433
 434         switch (new_state) {
 435         case 0: /* power off */
 436                 /* Call CDDR instead, since they both call the same method
 437                  * while CDDI takes 1 arg and we are not quite sure what it is.
 438                  */
 439                 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
 440                 if (ACPI_FAILURE(status)) {
 441                         pr_err("evaluation error _SB.CDDR\n");
 442                         result = -EIO;
 443                 }
 444                 break;
 445         case 1: /* power on */
 446                 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL);
 447                 if (ACPI_FAILURE(status)) {
 448                         pr_err("evaluation error _SB.FBAY\n");
 449                         result = -EIO;
 450                 }
 451                 break;
 452         default:
 453                 result = -EINVAL;
 454                 break;
 455         }
 456
 457 out:
 458         return result;
 459 }
 460
 461
 462 /* sysfs user interface functions */
 463
 464 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
 465                             char *buf)
 466 {
 467         struct acpi_device *acpi = to_acpi_device(dev);
 468         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 469
 470         if (!acpi_pcc_retrieve_biosdata(pcc))
 471                 return -EIO;
 472
 473         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
 474 }
 475
 476 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
 477                             char *buf)
 478 {
 479         struct acpi_device *acpi = to_acpi_device(dev);
 480         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 481
 482         if (!acpi_pcc_retrieve_biosdata(pcc))
 483                 return -EIO;
 484
 485         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
 486 }
 487
 488 static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
 489                          char *buf)
 490 {
 491         struct acpi_device *acpi = to_acpi_device(dev);
 492         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 493
 494         if (!acpi_pcc_retrieve_biosdata(pcc))
 495                 return -EIO;
 496
 497         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);
 498 }
 499
 500 static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
 501                           const char *buf, size_t count)
 502 {
 503         struct acpi_device *acpi = to_acpi_device(dev);
 504         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 505         int err, val;
 506
 507         err = kstrtoint(buf, 0, &val);
 508         if (err)
 509                 return err;
 510         if (val == 0 || val == 1) {
 511                 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
 512                 pcc->mute = val;
 513         }
 514
 515         return count;
 516 }
 517
 518 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
 519                            char *buf)
 520 {
 521         struct acpi_device *acpi = to_acpi_device(dev);
 522         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 523
 524         if (!acpi_pcc_retrieve_biosdata(pcc))
 525                 return -EIO;
 526
 527         return sysfs_emit(buf, "%u\n", pcc->sticky_key);
 528 }
 529
 530 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
 531                           const char *buf, size_t count)
 532 {
 533         struct acpi_device *acpi = to_acpi_device(dev);
 534         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 535         int err, val;
 536
 537         err = kstrtoint(buf, 0, &val);
 538         if (err)
 539                 return err;
 540         if (val == 0 || val == 1) {
 541                 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
 542                 pcc->sticky_key = val;
 543         }
 544
 545         return count;
 546 }
 547
 548 static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
 549                                 char *buf)
 550 {
 551         struct acpi_device *acpi = to_acpi_device(dev);
 552         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 553         int result;
 554
 555         if (!acpi_pcc_retrieve_biosdata(pcc))
 556                 return -EIO;
 557
 558         switch (pcc->sinf[SINF_ECO_MODE]) {
 559         case (ECO_MODE_OFF + 3):
 560                 result = 0;
 561                 break;
 562         case (ECO_MODE_ON + 3):
 563                 result = 1;
 564                 break;
 565         default:
 566                 result = -EIO;
 567                 break;
 568         }
 569         return sysfs_emit(buf, "%u\n", result);
 570 }
 571
 572 static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
 573                           const char *buf, size_t count)
 574 {
 575         struct acpi_device *acpi = to_acpi_device(dev);
 576         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 577         int err, state;
 578
 579         union acpi_object param[2];
 580         struct acpi_object_list input;
 581         acpi_status status;
 582
 583         param[0].type = ACPI_TYPE_INTEGER;
 584         param[0].integer.value = 0x15;
 585         param[1].type = ACPI_TYPE_INTEGER;
 586         input.count = 2;
 587         input.pointer = param;
 588
 589         err = kstrtoint(buf, 0, &state);
 590         if (err)
 591                 return err;
 592
 593         switch (state) {
 594         case 0:
 595                 param[1].integer.value = ECO_MODE_OFF;
 596                 pcc->sinf[SINF_ECO_MODE] = 0;
 597                 pcc->eco_mode = 0;
 598                 break;
 599         case 1:
 600                 param[1].integer.value = ECO_MODE_ON;
 601                 pcc->sinf[SINF_ECO_MODE] = 1;
 602                 pcc->eco_mode = 1;
 603                 break;
 604         default:
 605                 /* nothing to do */
 606                 return count;
 607         }
 608
 609         status = acpi_evaluate_object(NULL, METHOD_ECWR,
 610                                        &input, NULL);
 611         if (ACPI_FAILURE(status)) {
 612                 pr_err("%s evaluation failed\n", METHOD_ECWR);
 613                 return -EINVAL;
 614         }
 615
 616         return count;
 617 }
 618
 619 static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
 620                                   char *buf)
 621 {
 622         struct acpi_device *acpi = to_acpi_device(dev);
 623         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 624
 625         if (!acpi_pcc_retrieve_biosdata(pcc))
 626                 return -EIO;
 627
 628         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
 629 }
 630
 631 static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
 632                                    const char *buf, size_t count)
 633 {
 634         struct acpi_device *acpi = to_acpi_device(dev);
 635         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 636         int err, val;
 637
 638         err = kstrtoint(buf, 0, &val);
 639         if (err)
 640                 return err;
 641         if (val >= 0 && val <= 255) {
 642                 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
 643                 pcc->ac_brightness = val;
 644         }
 645
 646         return count;
 647 }
 648
 649 static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
 650                                   char *buf)
 651 {
 652         struct acpi_device *acpi = to_acpi_device(dev);
 653         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 654
 655         if (!acpi_pcc_retrieve_biosdata(pcc))
 656                 return -EIO;
 657
 658         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
 659 }
 660
 661 static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
 662                                    const char *buf, size_t count)
 663 {
 664         struct acpi_device *acpi = to_acpi_device(dev);
 665         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 666         int err, val;
 667
 668         err = kstrtoint(buf, 0, &val);
 669         if (err)
 670                 return err;
 671         if (val >= 0 && val <= 255) {
 672                 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
 673                 pcc->dc_brightness = val;
 674         }
 675
 676         return count;
 677 }
 678
 679 static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
 680                                        char *buf)
 681 {
 682         struct acpi_device *acpi = to_acpi_device(dev);
 683         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 684
 685         if (!acpi_pcc_retrieve_biosdata(pcc))
 686                 return -EIO;
 687
 688         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
 689 }
 690
 691 static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
 692                                         const char *buf, size_t count)
 693 {
 694         struct acpi_device *acpi = to_acpi_device(dev);
 695         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 696         int err, val;
 697
 698         err = kstrtoint(buf, 0, &val);
 699         if (err)
 700                 return err;
 701
 702         if (val >= 0 && val <= 255) {
 703                 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
 704                 pcc->current_brightness = val;
 705         }
 706
 707         return count;
 708 }
 709
 710 static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
 711                             char *buf)
 712 {
 713         return sysfs_emit(buf, "%d\n", get_optd_power_state());
 714 }
 715
 716 static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
 717                            const char *buf, size_t count)
 718 {
 719         int err, val;
 720
 721         err = kstrtoint(buf, 10, &val);
 722         if (err)
 723                 return err;
 724         set_optd_power_state(val);
 725         return count;
 726 }
 727
 728 static DEVICE_ATTR_RO(numbatt);
 729 static DEVICE_ATTR_RO(lcdtype);
 730 static DEVICE_ATTR_RW(mute);
 731 static DEVICE_ATTR_RW(sticky_key);
 732 static DEVICE_ATTR_RW(eco_mode);
 733 static DEVICE_ATTR_RW(ac_brightness);
 734 static DEVICE_ATTR_RW(dc_brightness);
 735 static DEVICE_ATTR_RW(current_brightness);
 736 static DEVICE_ATTR_RW(cdpower);
 737
 738 static struct attribute *pcc_sysfs_entries[] = {
 739         &dev_attr_numbatt.attr,
 740         &dev_attr_lcdtype.attr,
 741         &dev_attr_mute.attr,
 742         &dev_attr_sticky_key.attr,
 743         &dev_attr_eco_mode.attr,
 744         &dev_attr_ac_brightness.attr,
 745         &dev_attr_dc_brightness.attr,
 746         &dev_attr_current_brightness.attr,
 747         &dev_attr_cdpower.attr,
 748         NULL,
 749 };
 750
 751 static const struct attribute_group pcc_attr_group = {
 752         .name   = NULL,         /* put in device directory */
 753         .attrs  = pcc_sysfs_entries,
 754 };
 755
 756
 757 /* hotkey input device driver */
 758
 759 static int sleep_keydown_seen;
 760 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
 761 {
 762         struct input_dev *hotk_input_dev = pcc->input_dev;
 763         int rc;
 764         unsigned long long result;
 765
 766         rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
 767                                    NULL, &result);
 768         if (ACPI_FAILURE(rc)) {
 769                 pr_err("error getting hotkey status\n");
 770                 return;
 771         }
 772
 773         /* hack: some firmware sends no key down for sleep / hibernate */
 774         if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
 775                 if (result & 0x80)
 776                         sleep_keydown_seen = 1;
 777                 if (!sleep_keydown_seen)
 778                         sparse_keymap_report_event(hotk_input_dev,
 779                                         result & 0xf, 0x80, false);
 780         }
 781
 782         if ((result & 0xf) == 0x7 || (result & 0xf) == 0x9 || (result & 0xf) == 0xa) {
 783                 if (!sparse_keymap_report_event(hotk_input_dev,
 784                                                 result & 0xf, result & 0x80, false))
 785                         pr_err("Unknown hotkey event: 0x%04llx\n", result);
 786         }
 787 }
 788
 789 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
 790 {
 791         struct pcc_acpi *pcc = acpi_driver_data(device);
 792
 793         switch (event) {
 794         case HKEY_NOTIFY:
 795                 acpi_pcc_generate_keyinput(pcc);
 796                 break;
 797         default:
 798                 /* nothing to do */
 799                 break;
 800         }
 801 }
 802
 803 static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
 804 {
 805         if (event != ACPI_NOTIFY_EJECT_REQUEST)
 806                 return;
 807
 808         set_optd_power_state(0);
 809 }
 810
 811 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
 812 {
 813         acpi_status status;
 814         acpi_handle handle;
 815
 816         status = acpi_get_handle(NULL, node, &handle);
 817
 818         if (ACPI_SUCCESS(status)) {
 819                 status = acpi_install_notify_handler(handle,
 820                                 ACPI_SYSTEM_NOTIFY,
 821                                 pcc_optd_notify, pcc);
 822                 if (ACPI_FAILURE(status))
 823                         pr_err("Failed to register notify on %s\n", node);
 824         } else
 825                 return -ENODEV;
 826
 827         return 0;
 828 }
 829
 830 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
 831 {
 832         acpi_status status = AE_OK;
 833         acpi_handle handle;
 834
 835         status = acpi_get_handle(NULL, node, &handle);
 836
 837         if (ACPI_SUCCESS(status)) {
 838                 status = acpi_remove_notify_handler(handle,
 839                                 ACPI_SYSTEM_NOTIFY,
 840                                 pcc_optd_notify);
 841                 if (ACPI_FAILURE(status))
 842                         pr_err("Error removing optd notify handler %s\n",
 843                                         node);
 844         }
 845 }
 846
 847 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
 848 {
 849         struct input_dev *input_dev;
 850         int error;
 851
 852         input_dev = input_allocate_device();
 853         if (!input_dev)
 854                 return -ENOMEM;
 855
 856         input_dev->name = ACPI_PCC_DRIVER_NAME;
 857         input_dev->phys = ACPI_PCC_INPUT_PHYS;
 858         input_dev->id.bustype = BUS_HOST;
 859         input_dev->id.vendor = 0x0001;
 860         input_dev->id.product = 0x0001;
 861         input_dev->id.version = 0x0100;
 862
 863         error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
 864         if (error) {
 865                 pr_err("Unable to setup input device keymap\n");
 866                 goto err_free_dev;
 867         }
 868
 869         error = input_register_device(input_dev);
 870         if (error) {
 871                 pr_err("Unable to register input device\n");
 872                 goto err_free_dev;
 873         }
 874
 875         pcc->input_dev = input_dev;
 876         return 0;
 877
 878  err_free_dev:
 879         input_free_device(input_dev);
 880         return error;
 881 }
 882
 883 /* kernel module interface */
 884
 885 #ifdef CONFIG_PM_SLEEP
 886 static int acpi_pcc_hotkey_resume(struct device *dev)
 887 {
 888         struct pcc_acpi *pcc;
 889
 890         if (!dev)
 891                 return -EINVAL;
 892
 893         pcc = acpi_driver_data(to_acpi_device(dev));
 894         if (!pcc)
 895                 return -EINVAL;
 896
 897         acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
 898         acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
 899         acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
 900         acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
 901         acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
 902         acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
 903
 904         return 0;
 905 }
 906 #endif
 907
 908 static int acpi_pcc_hotkey_add(struct acpi_device *device)
 909 {
 910         struct backlight_properties props;
 911         struct pcc_acpi *pcc;
 912         int num_sifr, result;
 913
 914         if (!device)
 915                 return -EINVAL;
 916
 917         num_sifr = acpi_pcc_get_sqty(device);
 918
 919         if (num_sifr < 0 || num_sifr > 255) {
 920                 pr_err("num_sifr out of range");
 921                 return -ENODEV;
 922         }
 923
 924         pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
 925         if (!pcc) {
 926                 pr_err("Couldn't allocate mem for pcc");
 927                 return -ENOMEM;
 928         }
 929
 930         pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
 931         if (!pcc->sinf) {
 932                 result = -ENOMEM;
 933                 goto out_hotkey;
 934         }
 935
 936         pcc->device = device;
 937         pcc->handle = device->handle;
 938         pcc->num_sifr = num_sifr;
 939         device->driver_data = pcc;
 940         strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
 941         strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
 942
 943         result = acpi_pcc_init_input(pcc);
 944         if (result) {
 945                 pr_err("Error installing keyinput handler\n");
 946                 goto out_sinf;
 947         }
 948
 949         if (!acpi_pcc_retrieve_biosdata(pcc)) {
 950                 result = -EIO;
 951                 pr_err("Couldn't retrieve BIOS data\n");
 952                 goto out_input;
 953         }
 954         /* initialize backlight */
 955         memset(&props, 0, sizeof(struct backlight_properties));
 956         props.type = BACKLIGHT_PLATFORM;
 957         props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
 958         pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
 959                                                    &pcc_backlight_ops, &props);
 960         if (IS_ERR(pcc->backlight)) {
 961                 result = PTR_ERR(pcc->backlight);
 962                 goto out_input;
 963         }
 964
 965         /* read the initial brightness setting from the hardware */
 966         pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
 967
 968         /* Reset initial sticky key mode since the hardware register state is not consistent */
 969         acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
 970         pcc->sticky_key = 0;
 971
 972         pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
 973         pcc->mute = pcc->sinf[SINF_MUTE];
 974         pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
 975         pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
 976         pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
 977
 978         /* add sysfs attributes */
 979         result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
 980         if (result)
 981                 goto out_backlight;
 982
 983         /* optical drive initialization */
 984         if (ACPI_SUCCESS(check_optd_present())) {
 985                 pcc->platform = platform_device_register_simple("panasonic",
 986                         -1, NULL, 0);
 987                 if (IS_ERR(pcc->platform)) {
 988                         result = PTR_ERR(pcc->platform);
 989                         goto out_backlight;
 990                 }
 991                 result = device_create_file(&pcc->platform->dev,
 992                         &dev_attr_cdpower);
 993                 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
 994                 if (result)
 995                         goto out_platform;
 996         } else {
 997                 pcc->platform = NULL;
 998         }
 999
1000         return 0;
1001
1002 out_platform:
1003         platform_device_unregister(pcc->platform);
1004 out_backlight:
1005         backlight_device_unregister(pcc->backlight);
1006 out_input:
1007         input_unregister_device(pcc->input_dev);
1008 out_sinf:
1009         kfree(pcc->sinf);
1010 out_hotkey:
1011         kfree(pcc);
1012
1013         return result;
1014 }
1015
1016 static int acpi_pcc_hotkey_remove(struct acpi_device *device)
1017 {
1018         struct pcc_acpi *pcc = acpi_driver_data(device);
1019
1020         if (!device || !pcc)
1021                 return -EINVAL;
1022
1023         if (pcc->platform) {
1024                 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1025                 platform_device_unregister(pcc->platform);
1026         }
1027         pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1028
1029         sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1030
1031         backlight_device_unregister(pcc->backlight);
1032
1033         input_unregister_device(pcc->input_dev);
1034
1035         kfree(pcc->sinf);
1036         kfree(pcc);
1037
1038         return 0;
1039 }
1040
1041 module_acpi_driver(acpi_pcc_driver);