include/linux/hid.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Copyright (c) 1999 Andreas Gal
   4  *  Copyright (c) 2000-2001 Vojtech Pavlik
   5  *  Copyright (c) 2006-2007 Jiri Kosina
   6  */
   7 /*
   8  *
   9  * Should you need to contact me, the author, you can do so either by
  10  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  11  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  12  */
  13 #ifndef __HID_H
  14 #define __HID_H
  15
  16
  17 #include <linux/bitops.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/list.h>
  21 #include <linux/mod_devicetable.h> /* hid_device_id */
  22 #include <linux/timer.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/input.h>
  25 #include <linux/semaphore.h>
  26 #include <linux/mutex.h>
  27 #include <linux/power_supply.h>
  28 #include <uapi/linux/hid.h>
  29 #include <linux/hid_bpf.h>
  30
  31 /*
  32  * We parse each description item into this structure. Short items data
  33  * values are expanded to 32-bit signed int, long items contain a pointer
  34  * into the data area.
  35  */
  36
  37 struct hid_item {
  38         unsigned  format;
  39         __u8      size;
  40         __u8      type;
  41         __u8      tag;
  42         union {
  43             __u8   u8;
  44             __s8   s8;
  45             __u16  u16;
  46             __s16  s16;
  47             __u32  u32;
  48             __s32  s32;
  49             __u8  *longdata;
  50         } data;
  51 };
  52
  53 /*
  54  * HID report item format
  55  */
  56
  57 #define HID_ITEM_FORMAT_SHORT   0
  58 #define HID_ITEM_FORMAT_LONG    1
  59
  60 /*
  61  * Special tag indicating long items
  62  */
  63
  64 #define HID_ITEM_TAG_LONG       15
  65
  66 /*
  67  * HID report descriptor item type (prefix bit 2,3)
  68  */
  69
  70 #define HID_ITEM_TYPE_MAIN              0
  71 #define HID_ITEM_TYPE_GLOBAL            1
  72 #define HID_ITEM_TYPE_LOCAL             2
  73 #define HID_ITEM_TYPE_RESERVED          3
  74
  75 /*
  76  * HID report descriptor main item tags
  77  */
  78
  79 #define HID_MAIN_ITEM_TAG_INPUT                 8
  80 #define HID_MAIN_ITEM_TAG_OUTPUT                9
  81 #define HID_MAIN_ITEM_TAG_FEATURE               11
  82 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
  83 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
  84
  85 /*
  86  * HID report descriptor main item contents
  87  */
  88
  89 #define HID_MAIN_ITEM_CONSTANT          0x001
  90 #define HID_MAIN_ITEM_VARIABLE          0x002
  91 #define HID_MAIN_ITEM_RELATIVE          0x004
  92 #define HID_MAIN_ITEM_WRAP              0x008
  93 #define HID_MAIN_ITEM_NONLINEAR         0x010
  94 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
  95 #define HID_MAIN_ITEM_NULL_STATE        0x040
  96 #define HID_MAIN_ITEM_VOLATILE          0x080
  97 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
  98
  99 /*
 100  * HID report descriptor collection item types
 101  */
 102
 103 #define HID_COLLECTION_PHYSICAL         0
 104 #define HID_COLLECTION_APPLICATION      1
 105 #define HID_COLLECTION_LOGICAL          2
 106 #define HID_COLLECTION_NAMED_ARRAY      4
 107
 108 /*
 109  * HID report descriptor global item tags
 110  */
 111
 112 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 113 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 114 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 115 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 116 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 117 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 118 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 119 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 120 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 121 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 122 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 123 #define HID_GLOBAL_ITEM_TAG_POP                 11
 124
 125 /*
 126  * HID report descriptor local item tags
 127  */
 128
 129 #define HID_LOCAL_ITEM_TAG_USAGE                0
 130 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 131 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 132 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 133 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 134 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 135 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 136 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 137 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 138 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 139
 140 /*
 141  * HID usage tables
 142  */
 143
 144 #define HID_USAGE_PAGE          0xffff0000
 145
 146 #define HID_UP_UNDEFINED        0x00000000
 147 #define HID_UP_GENDESK          0x00010000
 148 #define HID_UP_SIMULATION       0x00020000
 149 #define HID_UP_GENDEVCTRLS      0x00060000
 150 #define HID_UP_KEYBOARD         0x00070000
 151 #define HID_UP_LED              0x00080000
 152 #define HID_UP_BUTTON           0x00090000
 153 #define HID_UP_ORDINAL          0x000a0000
 154 #define HID_UP_TELEPHONY        0x000b0000
 155 #define HID_UP_CONSUMER         0x000c0000
 156 #define HID_UP_DIGITIZER        0x000d0000
 157 #define HID_UP_PID              0x000f0000
 158 #define HID_UP_BATTERY          0x00850000
 159 #define HID_UP_CAMERA           0x00900000
 160 #define HID_UP_HPVENDOR         0xff7f0000
 161 #define HID_UP_HPVENDOR2        0xff010000
 162 #define HID_UP_MSVENDOR         0xff000000
 163 #define HID_UP_CUSTOM           0x00ff0000
 164 #define HID_UP_LOGIVENDOR       0xffbc0000
 165 #define HID_UP_LOGIVENDOR2   0xff090000
 166 #define HID_UP_LOGIVENDOR3   0xff430000
 167 #define HID_UP_LNVENDOR         0xffa00000
 168 #define HID_UP_SENSOR           0x00200000
 169 #define HID_UP_ASUSVENDOR       0xff310000
 170 #define HID_UP_GOOGLEVENDOR     0xffd10000
 171
 172 #define HID_USAGE               0x0000ffff
 173
 174 #define HID_GD_POINTER          0x00010001
 175 #define HID_GD_MOUSE            0x00010002
 176 #define HID_GD_JOYSTICK         0x00010004
 177 #define HID_GD_GAMEPAD          0x00010005
 178 #define HID_GD_KEYBOARD         0x00010006
 179 #define HID_GD_KEYPAD           0x00010007
 180 #define HID_GD_MULTIAXIS        0x00010008
 181 /*
 182  * Microsoft Win8 Wireless Radio Controls extensions CA, see:
 183  * http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
 184  */
 185 #define HID_GD_WIRELESS_RADIO_CTLS      0x0001000c
 186 /*
 187  * System Multi-Axis, see:
 188  * http://www.usb.org/developers/hidpage/HUTRR62_-_Generic_Desktop_CA_for_System_Multi-Axis_Controllers.txt
 189  */
 190 #define HID_GD_SYSTEM_MULTIAXIS 0x0001000e
 191
 192 #define HID_GD_X                0x00010030
 193 #define HID_GD_Y                0x00010031
 194 #define HID_GD_Z                0x00010032
 195 #define HID_GD_RX               0x00010033
 196 #define HID_GD_RY               0x00010034
 197 #define HID_GD_RZ               0x00010035
 198 #define HID_GD_SLIDER           0x00010036
 199 #define HID_GD_DIAL             0x00010037
 200 #define HID_GD_WHEEL            0x00010038
 201 #define HID_GD_HATSWITCH        0x00010039
 202 #define HID_GD_BUFFER           0x0001003a
 203 #define HID_GD_BYTECOUNT        0x0001003b
 204 #define HID_GD_MOTION           0x0001003c
 205 #define HID_GD_START            0x0001003d
 206 #define HID_GD_SELECT           0x0001003e
 207 #define HID_GD_VX               0x00010040
 208 #define HID_GD_VY               0x00010041
 209 #define HID_GD_VZ               0x00010042
 210 #define HID_GD_VBRX             0x00010043
 211 #define HID_GD_VBRY             0x00010044
 212 #define HID_GD_VBRZ             0x00010045
 213 #define HID_GD_VNO              0x00010046
 214 #define HID_GD_FEATURE          0x00010047
 215 #define HID_GD_RESOLUTION_MULTIPLIER    0x00010048
 216 #define HID_GD_SYSTEM_CONTROL   0x00010080
 217 #define HID_GD_UP               0x00010090
 218 #define HID_GD_DOWN             0x00010091
 219 #define HID_GD_RIGHT            0x00010092
 220 #define HID_GD_LEFT             0x00010093
 221 /* Microsoft Win8 Wireless Radio Controls CA usage codes */
 222 #define HID_GD_RFKILL_BTN       0x000100c6
 223 #define HID_GD_RFKILL_LED       0x000100c7
 224 #define HID_GD_RFKILL_SWITCH    0x000100c8
 225
 226 #define HID_DC_BATTERYSTRENGTH  0x00060020
 227
 228 #define HID_CP_CONSUMER_CONTROL 0x000c0001
 229 #define HID_CP_AC_PAN           0x000c0238
 230
 231 #define HID_DG_DIGITIZER        0x000d0001
 232 #define HID_DG_PEN              0x000d0002
 233 #define HID_DG_LIGHTPEN         0x000d0003
 234 #define HID_DG_TOUCHSCREEN      0x000d0004
 235 #define HID_DG_TOUCHPAD         0x000d0005
 236 #define HID_DG_WHITEBOARD       0x000d0006
 237 #define HID_DG_STYLUS           0x000d0020
 238 #define HID_DG_PUCK             0x000d0021
 239 #define HID_DG_FINGER           0x000d0022
 240 #define HID_DG_TIPPRESSURE      0x000d0030
 241 #define HID_DG_BARRELPRESSURE   0x000d0031
 242 #define HID_DG_INRANGE          0x000d0032
 243 #define HID_DG_TOUCH            0x000d0033
 244 #define HID_DG_UNTOUCH          0x000d0034
 245 #define HID_DG_TAP              0x000d0035
 246 #define HID_DG_TRANSDUCER_INDEX 0x000d0038
 247 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 248 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 249 #define HID_DG_BATTERYSTRENGTH  0x000d003b
 250 #define HID_DG_INVERT           0x000d003c
 251 #define HID_DG_TILT_X           0x000d003d
 252 #define HID_DG_TILT_Y           0x000d003e
 253 #define HID_DG_TWIST            0x000d0041
 254 #define HID_DG_TIPSWITCH        0x000d0042
 255 #define HID_DG_TIPSWITCH2       0x000d0043
 256 #define HID_DG_BARRELSWITCH     0x000d0044
 257 #define HID_DG_ERASER           0x000d0045
 258 #define HID_DG_TABLETPICK       0x000d0046
 259 #define HID_DG_PEN_COLOR                        0x000d005c
 260 #define HID_DG_PEN_LINE_WIDTH                   0x000d005e
 261 #define HID_DG_PEN_LINE_STYLE                   0x000d0070
 262 #define HID_DG_PEN_LINE_STYLE_INK               0x000d0072
 263 #define HID_DG_PEN_LINE_STYLE_PENCIL            0x000d0073
 264 #define HID_DG_PEN_LINE_STYLE_HIGHLIGHTER       0x000d0074
 265 #define HID_DG_PEN_LINE_STYLE_CHISEL_MARKER     0x000d0075
 266 #define HID_DG_PEN_LINE_STYLE_BRUSH             0x000d0076
 267 #define HID_DG_PEN_LINE_STYLE_NO_PREFERENCE     0x000d0077
 268
 269 #define HID_CP_CONSUMERCONTROL  0x000c0001
 270 #define HID_CP_NUMERICKEYPAD    0x000c0002
 271 #define HID_CP_PROGRAMMABLEBUTTONS      0x000c0003
 272 #define HID_CP_MICROPHONE       0x000c0004
 273 #define HID_CP_HEADPHONE        0x000c0005
 274 #define HID_CP_GRAPHICEQUALIZER 0x000c0006
 275 #define HID_CP_FUNCTIONBUTTONS  0x000c0036
 276 #define HID_CP_SELECTION        0x000c0080
 277 #define HID_CP_MEDIASELECTION   0x000c0087
 278 #define HID_CP_SELECTDISC       0x000c00ba
 279 #define HID_CP_VOLUMEUP         0x000c00e9
 280 #define HID_CP_VOLUMEDOWN       0x000c00ea
 281 #define HID_CP_PLAYBACKSPEED    0x000c00f1
 282 #define HID_CP_PROXIMITY        0x000c0109
 283 #define HID_CP_SPEAKERSYSTEM    0x000c0160
 284 #define HID_CP_CHANNELLEFT      0x000c0161
 285 #define HID_CP_CHANNELRIGHT     0x000c0162
 286 #define HID_CP_CHANNELCENTER    0x000c0163
 287 #define HID_CP_CHANNELFRONT     0x000c0164
 288 #define HID_CP_CHANNELCENTERFRONT       0x000c0165
 289 #define HID_CP_CHANNELSIDE      0x000c0166
 290 #define HID_CP_CHANNELSURROUND  0x000c0167
 291 #define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT   0x000c0168
 292 #define HID_CP_CHANNELTOP       0x000c0169
 293 #define HID_CP_CHANNELUNKNOWN   0x000c016a
 294 #define HID_CP_APPLICATIONLAUNCHBUTTONS 0x000c0180
 295 #define HID_CP_GENERICGUIAPPLICATIONCONTROLS    0x000c0200
 296
 297 #define HID_DG_DEVICECONFIG     0x000d000e
 298 #define HID_DG_DEVICESETTINGS   0x000d0023
 299 #define HID_DG_AZIMUTH          0x000d003f
 300 #define HID_DG_CONFIDENCE       0x000d0047
 301 #define HID_DG_WIDTH            0x000d0048
 302 #define HID_DG_HEIGHT           0x000d0049
 303 #define HID_DG_CONTACTID        0x000d0051
 304 #define HID_DG_INPUTMODE        0x000d0052
 305 #define HID_DG_DEVICEINDEX      0x000d0053
 306 #define HID_DG_CONTACTCOUNT     0x000d0054
 307 #define HID_DG_CONTACTMAX       0x000d0055
 308 #define HID_DG_SCANTIME         0x000d0056
 309 #define HID_DG_SURFACESWITCH    0x000d0057
 310 #define HID_DG_BUTTONSWITCH     0x000d0058
 311 #define HID_DG_BUTTONTYPE       0x000d0059
 312 #define HID_DG_BARRELSWITCH2    0x000d005a
 313 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
 314 #define HID_DG_LATENCYMODE      0x000d0060
 315
 316 #define HID_BAT_ABSOLUTESTATEOFCHARGE   0x00850065
 317 #define HID_BAT_CHARGING                0x00850044
 318
 319 #define HID_VD_ASUS_CUSTOM_MEDIA_KEYS   0xff310076
 320
 321 /*
 322  * HID connect requests
 323  */
 324
 325 #define HID_CONNECT_HIDINPUT            BIT(0)
 326 #define HID_CONNECT_HIDINPUT_FORCE      BIT(1)
 327 #define HID_CONNECT_HIDRAW              BIT(2)
 328 #define HID_CONNECT_HIDDEV              BIT(3)
 329 #define HID_CONNECT_HIDDEV_FORCE        BIT(4)
 330 #define HID_CONNECT_FF                  BIT(5)
 331 #define HID_CONNECT_DRIVER              BIT(6)
 332 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 333                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 334
 335 /*
 336  * HID device quirks.
 337  */
 338
 339 /*
 340  * Increase this if you need to configure more HID quirks at module load time
 341  */
 342 #define MAX_USBHID_BOOT_QUIRKS 4
 343
 344 /**
 345  * DOC: HID quirks
 346  * | @HID_QUIRK_NOTOUCH:
 347  * | @HID_QUIRK_IGNORE: ignore this device
 348  * | @HID_QUIRK_NOGET:
 349  * | @HID_QUIRK_HIDDEV_FORCE:
 350  * | @HID_QUIRK_BADPAD:
 351  * | @HID_QUIRK_MULTI_INPUT:
 352  * | @HID_QUIRK_HIDINPUT_FORCE:
 353  * | @HID_QUIRK_ALWAYS_POLL:
 354  * | @HID_QUIRK_INPUT_PER_APP:
 355  * | @HID_QUIRK_X_INVERT:
 356  * | @HID_QUIRK_Y_INVERT:
 357  * | @HID_QUIRK_SKIP_OUTPUT_REPORTS:
 358  * | @HID_QUIRK_SKIP_OUTPUT_REPORT_ID:
 359  * | @HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP:
 360  * | @HID_QUIRK_HAVE_SPECIAL_DRIVER:
 361  * | @HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE:
 362  * | @HID_QUIRK_FULLSPEED_INTERVAL:
 363  * | @HID_QUIRK_NO_INIT_REPORTS:
 364  * | @HID_QUIRK_NO_IGNORE:
 365  * | @HID_QUIRK_NO_INPUT_SYNC:
 366  */
 367 /* BIT(0) reserved for backward compatibility, was HID_QUIRK_INVERT */
 368 #define HID_QUIRK_NOTOUCH                       BIT(1)
 369 #define HID_QUIRK_IGNORE                        BIT(2)
 370 #define HID_QUIRK_NOGET                         BIT(3)
 371 #define HID_QUIRK_HIDDEV_FORCE                  BIT(4)
 372 #define HID_QUIRK_BADPAD                        BIT(5)
 373 #define HID_QUIRK_MULTI_INPUT                   BIT(6)
 374 #define HID_QUIRK_HIDINPUT_FORCE                BIT(7)
 375 /* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
 376 /* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
 377 #define HID_QUIRK_ALWAYS_POLL                   BIT(10)
 378 #define HID_QUIRK_INPUT_PER_APP                 BIT(11)
 379 #define HID_QUIRK_X_INVERT                      BIT(12)
 380 #define HID_QUIRK_Y_INVERT                      BIT(13)
 381 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           BIT(16)
 382 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         BIT(17)
 383 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  BIT(18)
 384 #define HID_QUIRK_HAVE_SPECIAL_DRIVER           BIT(19)
 385 #define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE  BIT(20)
 386 #define HID_QUIRK_NOINVERT                      BIT(21)
 387 #define HID_QUIRK_FULLSPEED_INTERVAL            BIT(28)
 388 #define HID_QUIRK_NO_INIT_REPORTS               BIT(29)
 389 #define HID_QUIRK_NO_IGNORE                     BIT(30)
 390 #define HID_QUIRK_NO_INPUT_SYNC                 BIT(31)
 391
 392 /*
 393  * HID device groups
 394  *
 395  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
 396  * and has a value of 0x0000
 397  */
 398 #define HID_GROUP_GENERIC                       0x0001
 399 #define HID_GROUP_MULTITOUCH                    0x0002
 400 #define HID_GROUP_SENSOR_HUB                    0x0003
 401 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
 402
 403 /*
 404  * Vendor specific HID device groups
 405  */
 406 #define HID_GROUP_RMI                           0x0100
 407 #define HID_GROUP_WACOM                         0x0101
 408 #define HID_GROUP_LOGITECH_DJ_DEVICE            0x0102
 409 #define HID_GROUP_STEAM                         0x0103
 410 #define HID_GROUP_LOGITECH_27MHZ_DEVICE         0x0104
 411 #define HID_GROUP_VIVALDI                       0x0105
 412
 413 /*
 414  * HID protocol status
 415  */
 416 #define HID_REPORT_PROTOCOL     1
 417 #define HID_BOOT_PROTOCOL       0
 418
 419 /*
 420  * This is the global environment of the parser. This information is
 421  * persistent for main-items. The global environment can be saved and
 422  * restored with PUSH/POP statements.
 423  */
 424
 425 struct hid_global {
 426         unsigned usage_page;
 427         __s32    logical_minimum;
 428         __s32    logical_maximum;
 429         __s32    physical_minimum;
 430         __s32    physical_maximum;
 431         __s32    unit_exponent;
 432         unsigned unit;
 433         unsigned report_id;
 434         unsigned report_size;
 435         unsigned report_count;
 436 };
 437
 438 /*
 439  * This is the local environment. It is persistent up the next main-item.
 440  */
 441
 442 #define HID_MAX_USAGES                  12288
 443 #define HID_DEFAULT_NUM_COLLECTIONS     16
 444
 445 struct hid_local {
 446         unsigned usage[HID_MAX_USAGES]; /* usage array */
 447         u8 usage_size[HID_MAX_USAGES]; /* usage size array */
 448         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 449         unsigned usage_index;
 450         unsigned usage_minimum;
 451         unsigned delimiter_depth;
 452         unsigned delimiter_branch;
 453 };
 454
 455 /*
 456  * This is the collection stack. We climb up the stack to determine
 457  * application and function of each field.
 458  */
 459
 460 struct hid_collection {
 461         int parent_idx; /* device->collection */
 462         unsigned type;
 463         unsigned usage;
 464         unsigned level;
 465 };
 466
 467 struct hid_usage {
 468         unsigned  hid;                  /* hid usage code */
 469         unsigned  collection_index;     /* index into collection array */
 470         unsigned  usage_index;          /* index into usage array */
 471         __s8      resolution_multiplier;/* Effective Resolution Multiplier
 472                                            (HUT v1.12, 4.3.1), default: 1 */
 473         /* hidinput data */
 474         __s8      wheel_factor;         /* 120/resolution_multiplier */
 475         __u16     code;                 /* input driver code */
 476         __u8      type;                 /* input driver type */
 477         __s8      hat_min;              /* hat switch fun */
 478         __s8      hat_max;              /* ditto */
 479         __s8      hat_dir;              /* ditto */
 480         __s16     wheel_accumulated;    /* hi-res wheel */
 481 };
 482
 483 struct hid_input;
 484
 485 struct hid_field {
 486         unsigned  physical;             /* physical usage for this field */
 487         unsigned  logical;              /* logical usage for this field */
 488         unsigned  application;          /* application usage for this field */
 489         struct hid_usage *usage;        /* usage table for this function */
 490         unsigned  maxusage;             /* maximum usage index */
 491         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 492         unsigned  report_offset;        /* bit offset in the report */
 493         unsigned  report_size;          /* size of this field in the report */
 494         unsigned  report_count;         /* number of this field in the report */
 495         unsigned  report_type;          /* (input,output,feature) */
 496         __s32    *value;                /* last known value(s) */
 497         __s32    *new_value;            /* newly read value(s) */
 498         __s32    *usages_priorities;    /* priority of each usage when reading the report
 499                                          * bits 8-16 are reserved for hid-input usage
 500                                          */
 501         __s32     logical_minimum;
 502         __s32     logical_maximum;
 503         __s32     physical_minimum;
 504         __s32     physical_maximum;
 505         __s32     unit_exponent;
 506         unsigned  unit;
 507         bool      ignored;              /* this field is ignored in this event */
 508         struct hid_report *report;      /* associated report */
 509         unsigned index;                 /* index into report->field[] */
 510         /* hidinput data */
 511         struct hid_input *hidinput;     /* associated input structure */
 512         __u16 dpad;                     /* dpad input code */
 513         unsigned int slot_idx;          /* slot index in a report */
 514 };
 515
 516 #define HID_MAX_FIELDS 256
 517
 518 struct hid_field_entry {
 519         struct list_head list;
 520         struct hid_field *field;
 521         unsigned int index;
 522         __s32 priority;
 523 };
 524
 525 struct hid_report {
 526         struct list_head list;
 527         struct list_head hidinput_list;
 528         struct list_head field_entry_list;              /* ordered list of input fields */
 529         unsigned int id;                                /* id of this report */
 530         enum hid_report_type type;                      /* report type */
 531         unsigned int application;                       /* application usage for this report */
 532         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 533         struct hid_field_entry *field_entries;          /* allocated memory of input field_entry */
 534         unsigned maxfield;                              /* maximum valid field index */
 535         unsigned size;                                  /* size of the report (bits) */
 536         struct hid_device *device;                      /* associated device */
 537
 538         /* tool related state */
 539         bool tool_active;                               /* whether the current tool is active */
 540         unsigned int tool;                              /* BTN_TOOL_* */
 541 };
 542
 543 #define HID_MAX_IDS 256
 544
 545 struct hid_report_enum {
 546         unsigned numbered;
 547         struct list_head report_list;
 548         struct hid_report *report_id_hash[HID_MAX_IDS];
 549 };
 550
 551 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 552 #define HID_MAX_BUFFER_SIZE     16384           /* 16kb */
 553 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 554 #define HID_OUTPUT_FIFO_SIZE    64
 555
 556 struct hid_control_fifo {
 557         unsigned char dir;
 558         struct hid_report *report;
 559         char *raw_report;
 560 };
 561
 562 struct hid_output_fifo {
 563         struct hid_report *report;
 564         char *raw_report;
 565 };
 566
 567 #define HID_CLAIMED_INPUT       BIT(0)
 568 #define HID_CLAIMED_HIDDEV      BIT(1)
 569 #define HID_CLAIMED_HIDRAW      BIT(2)
 570 #define HID_CLAIMED_DRIVER      BIT(3)
 571
 572 #define HID_STAT_ADDED          BIT(0)
 573 #define HID_STAT_PARSED         BIT(1)
 574 #define HID_STAT_DUP_DETECTED   BIT(2)
 575 #define HID_STAT_REPROBED       BIT(3)
 576
 577 struct hid_input {
 578         struct list_head list;
 579         struct hid_report *report;
 580         struct input_dev *input;
 581         const char *name;
 582         struct list_head reports;       /* the list of reports */
 583         unsigned int application;       /* application usage for this input */
 584         bool registered;
 585 };
 586
 587 enum hid_type {
 588         HID_TYPE_OTHER = 0,
 589         HID_TYPE_USBMOUSE,
 590         HID_TYPE_USBNONE
 591 };
 592
 593 enum hid_battery_status {
 594         HID_BATTERY_UNKNOWN = 0,
 595         HID_BATTERY_QUERIED,            /* Kernel explicitly queried battery strength */
 596         HID_BATTERY_REPORTED,           /* Device sent unsolicited battery strength report */
 597 };
 598
 599 struct hid_driver;
 600 struct hid_ll_driver;
 601
 602 struct hid_device {                                                     /* device report descriptor */
 603         __u8 *dev_rdesc;
 604         unsigned dev_rsize;
 605         __u8 *rdesc;
 606         unsigned rsize;
 607         struct hid_collection *collection;                              /* List of HID collections */
 608         unsigned collection_size;                                       /* Number of allocated hid_collections */
 609         unsigned maxcollection;                                         /* Number of parsed collections */
 610         unsigned maxapplication;                                        /* Number of applications */
 611         __u16 bus;                                                      /* BUS ID */
 612         __u16 group;                                                    /* Report group */
 613         __u32 vendor;                                                   /* Vendor ID */
 614         __u32 product;                                                  /* Product ID */
 615         __u32 version;                                                  /* HID version */
 616         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 617         unsigned country;                                               /* HID country */
 618         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 619         struct work_struct led_work;                                    /* delayed LED worker */
 620
 621         struct semaphore driver_input_lock;                             /* protects the current driver */
 622         struct device dev;                                              /* device */
 623         struct hid_driver *driver;
 624         void *devres_group_id;                                          /* ID of probe devres group     */
 625
 626         const struct hid_ll_driver *ll_driver;
 627         struct mutex ll_open_lock;
 628         unsigned int ll_open_count;
 629
 630 #ifdef CONFIG_HID_BATTERY_STRENGTH
 631         /*
 632          * Power supply information for HID devices which report
 633          * battery strength. power_supply was successfully registered if
 634          * battery is non-NULL.
 635          */
 636         struct power_supply *battery;
 637         __s32 battery_capacity;
 638         __s32 battery_min;
 639         __s32 battery_max;
 640         __s32 battery_report_type;
 641         __s32 battery_report_id;
 642         __s32 battery_charge_status;
 643         enum hid_battery_status battery_status;
 644         bool battery_avoid_query;
 645         ktime_t battery_ratelimit_time;
 646 #endif
 647
 648         unsigned long status;                                           /* see STAT flags above */
 649         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 650         unsigned quirks;                                                /* Various quirks the device can pull on us */
 651         unsigned initial_quirks;                                        /* Initial set of quirks supplied when creating device */
 652         bool io_started;                                                /* If IO has started */
 653
 654         struct list_head inputs;                                        /* The list of inputs */
 655         void *hiddev;                                                   /* The hiddev structure */
 656         void *hidraw;
 657
 658         char name[128];                                                 /* Device name */
 659         char phys[64];                                                  /* Device physical location */
 660         char uniq[64];                                                  /* Device unique identifier (serial #) */
 661
 662         void *driver_data;
 663
 664         /* temporary hid_ff handling (until moved to the drivers) */
 665         int (*ff_init)(struct hid_device *);
 666
 667         /* hiddev event handler */
 668         int (*hiddev_connect)(struct hid_device *, unsigned int);
 669         void (*hiddev_disconnect)(struct hid_device *);
 670         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 671                                   struct hid_usage *, __s32);
 672         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 673
 674         /* debugging support via debugfs */
 675         unsigned short debug;
 676         struct dentry *debug_dir;
 677         struct dentry *debug_rdesc;
 678         struct dentry *debug_events;
 679         struct list_head debug_list;
 680         spinlock_t  debug_list_lock;
 681         wait_queue_head_t debug_wait;
 682         struct kref                     ref;
 683
 684         unsigned int id;                                                /* system unique id */
 685
 686 #ifdef CONFIG_HID_BPF
 687         struct hid_bpf bpf;                                             /* hid-bpf data */
 688 #endif /* CONFIG_HID_BPF */
 689 };
 690
 691 void hiddev_free(struct kref *ref);
 692
 693 #define to_hid_device(pdev) \
 694         container_of(pdev, struct hid_device, dev)
 695
 696 static inline void *hid_get_drvdata(struct hid_device *hdev)
 697 {
 698         return dev_get_drvdata(&hdev->dev);
 699 }
 700
 701 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 702 {
 703         dev_set_drvdata(&hdev->dev, data);
 704 }
 705
 706 #define HID_GLOBAL_STACK_SIZE 4
 707 #define HID_COLLECTION_STACK_SIZE 4
 708
 709 #define HID_SCAN_FLAG_MT_WIN_8                  BIT(0)
 710 #define HID_SCAN_FLAG_VENDOR_SPECIFIC           BIT(1)
 711 #define HID_SCAN_FLAG_GD_POINTER                BIT(2)
 712
 713 struct hid_parser {
 714         struct hid_global     global;
 715         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 716         unsigned int          global_stack_ptr;
 717         struct hid_local      local;
 718         unsigned int         *collection_stack;
 719         unsigned int          collection_stack_ptr;
 720         unsigned int          collection_stack_size;
 721         struct hid_device    *device;
 722         unsigned int          scan_flags;
 723 };
 724
 725 struct hid_class_descriptor {
 726         __u8  bDescriptorType;
 727         __le16 wDescriptorLength;
 728 } __attribute__ ((packed));
 729
 730 struct hid_descriptor {
 731         __u8  bLength;
 732         __u8  bDescriptorType;
 733         __le16 bcdHID;
 734         __u8  bCountryCode;
 735         __u8  bNumDescriptors;
 736
 737         struct hid_class_descriptor desc[1];
 738 } __attribute__ ((packed));
 739
 740 #define HID_DEVICE(b, g, ven, prod)                                     \
 741         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 742 #define HID_USB_DEVICE(ven, prod)                               \
 743         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 744 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 745         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 746 #define HID_I2C_DEVICE(ven, prod)                               \
 747         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
 748
 749 #define HID_REPORT_ID(rep) \
 750         .report_type = (rep)
 751 #define HID_USAGE_ID(uhid, utype, ucode) \
 752         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 753 /* we don't want to catch types and codes equal to 0 */
 754 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 755
 756 struct hid_report_id {
 757         __u32 report_type;
 758 };
 759 struct hid_usage_id {
 760         __u32 usage_hid;
 761         __u32 usage_type;
 762         __u32 usage_code;
 763 };
 764
 765 /**
 766  * struct hid_driver
 767  * @name: driver name (e.g. "Footech_bar-wheel")
 768  * @id_table: which devices is this driver for (must be non-NULL for probe
 769  *            to be called)
 770  * @dyn_list: list of dynamically added device ids
 771  * @dyn_lock: lock protecting @dyn_list
 772  * @match: check if the given device is handled by this driver
 773  * @probe: new device inserted
 774  * @remove: device removed (NULL if not a hot-plug capable driver)
 775  * @report_table: on which reports to call raw_event (NULL means all)
 776  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 777  * @usage_table: on which events to call event (NULL means all)
 778  * @event: if usage in usage_table, this hook is called (NULL means nop)
 779  * @report: this hook is called after parsing a report (NULL means nop)
 780  * @report_fixup: called before report descriptor parsing (NULL means nop)
 781  * @input_mapping: invoked on input registering before mapping an usage
 782  * @input_mapped: invoked on input registering after mapping an usage
 783  * @input_configured: invoked just before the device is registered
 784  * @feature_mapping: invoked on feature registering
 785  * @suspend: invoked on suspend (NULL means nop)
 786  * @resume: invoked on resume if device was not reset (NULL means nop)
 787  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 788  *
 789  * probe should return -errno on error, or 0 on success. During probe,
 790  * input will not be passed to raw_event unless hid_device_io_start is
 791  * called.
 792  *
 793  * raw_event and event should return negative on error, any other value will
 794  * pass the event on to .event() typically return 0 for success.
 795  *
 796  * input_mapping shall return a negative value to completely ignore this usage
 797  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 798  * usage by generic code (no special handling needed) or positive to skip
 799  * generic parsing (needed special handling which was done in the hook already)
 800  * input_mapped shall return negative to inform the layer that this usage
 801  * should not be considered for further processing or zero to notify that
 802  * no processing was performed and should be done in a generic manner
 803  * Both these functions may be NULL which means the same behavior as returning
 804  * zero from them.
 805  */
 806 struct hid_driver {
 807         char *name;
 808         const struct hid_device_id *id_table;
 809
 810         struct list_head dyn_list;
 811         spinlock_t dyn_lock;
 812
 813         bool (*match)(struct hid_device *dev, bool ignore_special_driver);
 814         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 815         void (*remove)(struct hid_device *dev);
 816
 817         const struct hid_report_id *report_table;
 818         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 819                         u8 *data, int size);
 820         const struct hid_usage_id *usage_table;
 821         int (*event)(struct hid_device *hdev, struct hid_field *field,
 822                         struct hid_usage *usage, __s32 value);
 823         void (*report)(struct hid_device *hdev, struct hid_report *report);
 824
 825         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 826                         unsigned int *size);
 827
 828         int (*input_mapping)(struct hid_device *hdev,
 829                         struct hid_input *hidinput, struct hid_field *field,
 830                         struct hid_usage *usage, unsigned long **bit, int *max);
 831         int (*input_mapped)(struct hid_device *hdev,
 832                         struct hid_input *hidinput, struct hid_field *field,
 833                         struct hid_usage *usage, unsigned long **bit, int *max);
 834         int (*input_configured)(struct hid_device *hdev,
 835                                 struct hid_input *hidinput);
 836         void (*feature_mapping)(struct hid_device *hdev,
 837                         struct hid_field *field,
 838                         struct hid_usage *usage);
 839
 840         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 841         int (*resume)(struct hid_device *hdev);
 842         int (*reset_resume)(struct hid_device *hdev);
 843
 844 /* private: */
 845         struct device_driver driver;
 846 };
 847
 848 #define to_hid_driver(pdrv) \
 849         container_of(pdrv, struct hid_driver, driver)
 850
 851 /**
 852  * struct hid_ll_driver - low level driver callbacks
 853  * @start: called on probe to start the device
 854  * @stop: called on remove
 855  * @open: called by input layer on open
 856  * @close: called by input layer on close
 857  * @power: request underlying hardware to enter requested power mode
 858  * @parse: this method is called only once to parse the device data,
 859  *         shouldn't allocate anything to not leak memory
 860  * @request: send report request to device (e.g. feature report)
 861  * @wait: wait for buffered io to complete (send/recv reports)
 862  * @raw_request: send raw report request to device (e.g. feature report)
 863  * @output_report: send output report to device
 864  * @idle: send idle request to device
 865  * @may_wakeup: return if device may act as a wakeup source during system-suspend
 866  * @max_buffer_size: over-ride maximum data buffer size (default: HID_MAX_BUFFER_SIZE)
 867  */
 868 struct hid_ll_driver {
 869         int (*start)(struct hid_device *hdev);
 870         void (*stop)(struct hid_device *hdev);
 871
 872         int (*open)(struct hid_device *hdev);
 873         void (*close)(struct hid_device *hdev);
 874
 875         int (*power)(struct hid_device *hdev, int level);
 876
 877         int (*parse)(struct hid_device *hdev);
 878
 879         void (*request)(struct hid_device *hdev,
 880                         struct hid_report *report, int reqtype);
 881
 882         int (*wait)(struct hid_device *hdev);
 883
 884         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
 885                             __u8 *buf, size_t len, unsigned char rtype,
 886                             int reqtype);
 887
 888         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 889
 890         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 891         bool (*may_wakeup)(struct hid_device *hdev);
 892
 893         unsigned int max_buffer_size;
 894 };
 895
 896 extern bool hid_is_usb(const struct hid_device *hdev);
 897
 898 #define PM_HINT_FULLON  1<<5
 899 #define PM_HINT_NORMAL  1<<1
 900
 901 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 902 /* We ignore a few input applications that are not widely used */
 903 #define IS_INPUT_APPLICATION(a) \
 904                 (((a >= HID_UP_GENDESK) && (a <= HID_GD_MULTIAXIS)) \
 905                 || ((a >= HID_DG_DIGITIZER) && (a <= HID_DG_WHITEBOARD)) \
 906                 || (a == HID_GD_SYSTEM_CONTROL) || (a == HID_CP_CONSUMER_CONTROL) \
 907                 || (a == HID_GD_WIRELESS_RADIO_CTLS))
 908
 909 /* HID core API */
 910
 911 extern bool hid_ignore(struct hid_device *);
 912 extern int hid_add_device(struct hid_device *);
 913 extern void hid_destroy_device(struct hid_device *);
 914
 915 extern const struct bus_type hid_bus_type;
 916
 917 extern int __must_check __hid_register_driver(struct hid_driver *,
 918                 struct module *, const char *mod_name);
 919
 920 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 921 #define hid_register_driver(driver) \
 922         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 923
 924 extern void hid_unregister_driver(struct hid_driver *);
 925
 926 /**
 927  * module_hid_driver() - Helper macro for registering a HID driver
 928  * @__hid_driver: hid_driver struct
 929  *
 930  * Helper macro for HID drivers which do not do anything special in module
 931  * init/exit. This eliminates a lot of boilerplate. Each module may only
 932  * use this macro once, and calling it replaces module_init() and module_exit()
 933  */
 934 #define module_hid_driver(__hid_driver) \
 935         module_driver(__hid_driver, hid_register_driver, \
 936                       hid_unregister_driver)
 937
 938 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 939 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 940 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 941 extern void hidinput_disconnect(struct hid_device *);
 942
 943 int hid_set_field(struct hid_field *, unsigned, __s32);
 944 int hid_input_report(struct hid_device *hid, enum hid_report_type type, u8 *data, u32 size,
 945                      int interrupt);
 946 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 947 unsigned int hidinput_count_leds(struct hid_device *hid);
 948 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 949 void hid_output_report(struct hid_report *report, __u8 *data);
 950 int __hid_request(struct hid_device *hid, struct hid_report *rep, enum hid_class_request reqtype);
 951 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 952 struct hid_device *hid_allocate_device(void);
 953 struct hid_report *hid_register_report(struct hid_device *device,
 954                                        enum hid_report_type type, unsigned int id,
 955                                        unsigned int application);
 956 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 957 struct hid_report *hid_validate_values(struct hid_device *hid,
 958                                        enum hid_report_type type, unsigned int id,
 959                                        unsigned int field_index,
 960                                        unsigned int report_counts);
 961
 962 void hid_setup_resolution_multiplier(struct hid_device *hid);
 963 int hid_open_report(struct hid_device *device);
 964 int hid_check_keys_pressed(struct hid_device *hid);
 965 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 966 void hid_disconnect(struct hid_device *hid);
 967 bool hid_match_one_id(const struct hid_device *hdev,
 968                       const struct hid_device_id *id);
 969 const struct hid_device_id *hid_match_id(const struct hid_device *hdev,
 970                                          const struct hid_device_id *id);
 971 const struct hid_device_id *hid_match_device(struct hid_device *hdev,
 972                                              struct hid_driver *hdrv);
 973 bool hid_compare_device_paths(struct hid_device *hdev_a,
 974                               struct hid_device *hdev_b, char separator);
 975 s32 hid_snto32(__u32 value, unsigned n);
 976 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
 977                      unsigned offset, unsigned n);
 978
 979 #ifdef CONFIG_PM
 980 int hid_driver_suspend(struct hid_device *hdev, pm_message_t state);
 981 int hid_driver_reset_resume(struct hid_device *hdev);
 982 int hid_driver_resume(struct hid_device *hdev);
 983 #else
 984 static inline int hid_driver_suspend(struct hid_device *hdev, pm_message_t state) { return 0; }
 985 static inline int hid_driver_reset_resume(struct hid_device *hdev) { return 0; }
 986 static inline int hid_driver_resume(struct hid_device *hdev) { return 0; }
 987 #endif
 988
 989 /**
 990  * hid_device_io_start - enable HID input during probe, remove
 991  *
 992  * @hid: the device
 993  *
 994  * This should only be called during probe or remove and only be
 995  * called by the thread calling probe or remove. It will allow
 996  * incoming packets to be delivered to the driver.
 997  */
 998 static inline void hid_device_io_start(struct hid_device *hid) {
 999         if (hid->io_started) {
1000                 dev_warn(&hid->dev, "io already started\n");
1001                 return;
1002         }
1003         hid->io_started = true;
1004         up(&hid->driver_input_lock);
1005 }
1006
1007 /**
1008  * hid_device_io_stop - disable HID input during probe, remove
1009  *
1010  * @hid: the device
1011  *
1012  * Should only be called after hid_device_io_start. It will prevent
1013  * incoming packets from going to the driver for the duration of
1014  * probe, remove. If called during probe, packets will still go to the
1015  * driver after probe is complete. This function should only be called
1016  * by the thread calling probe or remove.
1017  */
1018 static inline void hid_device_io_stop(struct hid_device *hid) {
1019         if (!hid->io_started) {
1020                 dev_warn(&hid->dev, "io already stopped\n");
1021                 return;
1022         }
1023         hid->io_started = false;
1024         down(&hid->driver_input_lock);
1025 }
1026
1027 /**
1028  * hid_map_usage - map usage input bits
1029  *
1030  * @hidinput: hidinput which we are interested in
1031  * @usage: usage to fill in
1032  * @bit: pointer to input->{}bit (out parameter)
1033  * @max: maximal valid usage->code to consider later (out parameter)
1034  * @type: input event type (EV_KEY, EV_REL, ...)
1035  * @c: code which corresponds to this usage and type
1036  *
1037  * The value pointed to by @bit will be set to NULL if either @type is
1038  * an unhandled event type, or if @c is out of range for @type. This
1039  * can be used as an error condition.
1040  */
1041 static inline void hid_map_usage(struct hid_input *hidinput,
1042                 struct hid_usage *usage, unsigned long **bit, int *max,
1043                 __u8 type, unsigned int c)
1044 {
1045         struct input_dev *input = hidinput->input;
1046         unsigned long *bmap = NULL;
1047         unsigned int limit = 0;
1048
1049         switch (type) {
1050         case EV_ABS:
1051                 bmap = input->absbit;
1052                 limit = ABS_MAX;
1053                 break;
1054         case EV_REL:
1055                 bmap = input->relbit;
1056                 limit = REL_MAX;
1057                 break;
1058         case EV_KEY:
1059                 bmap = input->keybit;
1060                 limit = KEY_MAX;
1061                 break;
1062         case EV_LED:
1063                 bmap = input->ledbit;
1064                 limit = LED_MAX;
1065                 break;
1066         case EV_MSC:
1067                 bmap = input->mscbit;
1068                 limit = MSC_MAX;
1069                 break;
1070         }
1071
1072         if (unlikely(c > limit || !bmap)) {
1073                 pr_warn_ratelimited("%s: Invalid code %d type %d\n",
1074                                     input->name, c, type);
1075                 *bit = NULL;
1076                 return;
1077         }
1078
1079         usage->type = type;
1080         usage->code = c;
1081         *max = limit;
1082         *bit = bmap;
1083 }
1084
1085 /**
1086  * hid_map_usage_clear - map usage input bits and clear the input bit
1087  *
1088  * @hidinput: hidinput which we are interested in
1089  * @usage: usage to fill in
1090  * @bit: pointer to input->{}bit (out parameter)
1091  * @max: maximal valid usage->code to consider later (out parameter)
1092  * @type: input event type (EV_KEY, EV_REL, ...)
1093  * @c: code which corresponds to this usage and type
1094  *
1095  * The same as hid_map_usage, except the @c bit is also cleared in supported
1096  * bits (@bit).
1097  */
1098 static inline void hid_map_usage_clear(struct hid_input *hidinput,
1099                 struct hid_usage *usage, unsigned long **bit, int *max,
1100                 __u8 type, __u16 c)
1101 {
1102         hid_map_usage(hidinput, usage, bit, max, type, c);
1103         if (*bit)
1104                 clear_bit(usage->code, *bit);
1105 }
1106
1107 /**
1108  * hid_parse - parse HW reports
1109  *
1110  * @hdev: hid device
1111  *
1112  * Call this from probe after you set up the device (if needed). Your
1113  * report_fixup will be called (if non-NULL) after reading raw report from
1114  * device before passing it to hid layer for real parsing.
1115  */
1116 static inline int __must_check hid_parse(struct hid_device *hdev)
1117 {
1118         return hid_open_report(hdev);
1119 }
1120
1121 int __must_check hid_hw_start(struct hid_device *hdev,
1122                               unsigned int connect_mask);
1123 void hid_hw_stop(struct hid_device *hdev);
1124 int __must_check hid_hw_open(struct hid_device *hdev);
1125 void hid_hw_close(struct hid_device *hdev);
1126 void hid_hw_request(struct hid_device *hdev,
1127                     struct hid_report *report, enum hid_class_request reqtype);
1128 int hid_hw_raw_request(struct hid_device *hdev,
1129                        unsigned char reportnum, __u8 *buf,
1130                        size_t len, enum hid_report_type rtype,
1131                        enum hid_class_request reqtype);
1132 int hid_hw_output_report(struct hid_device *hdev, __u8 *buf, size_t len);
1133
1134 /**
1135  * hid_hw_power - requests underlying HW to go into given power mode
1136  *
1137  * @hdev: hid device
1138  * @level: requested power level (one of %PM_HINT_* defines)
1139  *
1140  * This function requests underlying hardware to enter requested power
1141  * mode.
1142  */
1143
1144 static inline int hid_hw_power(struct hid_device *hdev, int level)
1145 {
1146         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
1147 }
1148
1149
1150 /**
1151  * hid_hw_idle - send idle request to device
1152  *
1153  * @hdev: hid device
1154  * @report: report to control
1155  * @idle: idle state
1156  * @reqtype: hid request type
1157  */
1158 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1159                 enum hid_class_request reqtype)
1160 {
1161         if (hdev->ll_driver->idle)
1162                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1163
1164         return 0;
1165 }
1166
1167 /**
1168  * hid_hw_may_wakeup - return if the hid device may act as a wakeup source during system-suspend
1169  *
1170  * @hdev: hid device
1171  */
1172 static inline bool hid_hw_may_wakeup(struct hid_device *hdev)
1173 {
1174         if (hdev->ll_driver->may_wakeup)
1175                 return hdev->ll_driver->may_wakeup(hdev);
1176
1177         if (hdev->dev.parent)
1178                 return device_may_wakeup(hdev->dev.parent);
1179
1180         return false;
1181 }
1182
1183 /**
1184  * hid_hw_wait - wait for buffered io to complete
1185  *
1186  * @hdev: hid device
1187  */
1188 static inline void hid_hw_wait(struct hid_device *hdev)
1189 {
1190         if (hdev->ll_driver->wait)
1191                 hdev->ll_driver->wait(hdev);
1192 }
1193
1194 /**
1195  * hid_report_len - calculate the report length
1196  *
1197  * @report: the report we want to know the length
1198  */
1199 static inline u32 hid_report_len(struct hid_report *report)
1200 {
1201         return DIV_ROUND_UP(report->size, 8) + (report->id > 0);
1202 }
1203
1204 int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 *data, u32 size,
1205                          int interrupt);
1206
1207 /* HID quirks API */
1208 unsigned long hid_lookup_quirk(const struct hid_device *hdev);
1209 int hid_quirks_init(char **quirks_param, __u16 bus, int count);
1210 void hid_quirks_exit(__u16 bus);
1211
1212 #ifdef CONFIG_HID_PID
1213 int hid_pidff_init(struct hid_device *hid);
1214 #else
1215 #define hid_pidff_init NULL
1216 #endif
1217
1218 #define dbg_hid(fmt, ...) pr_debug("%s: " fmt, __FILE__, ##__VA_ARGS__)
1219
1220 #define hid_err(hid, fmt, ...)                          \
1221         dev_err(&(hid)->dev, fmt, ##__VA_ARGS__)
1222 #define hid_notice(hid, fmt, ...)                       \
1223         dev_notice(&(hid)->dev, fmt, ##__VA_ARGS__)
1224 #define hid_warn(hid, fmt, ...)                         \
1225         dev_warn(&(hid)->dev, fmt, ##__VA_ARGS__)
1226 #define hid_info(hid, fmt, ...)                         \
1227         dev_info(&(hid)->dev, fmt, ##__VA_ARGS__)
1228 #define hid_dbg(hid, fmt, ...)                          \
1229         dev_dbg(&(hid)->dev, fmt, ##__VA_ARGS__)
1230
1231 #define hid_err_once(hid, fmt, ...)                     \
1232         dev_err_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1233 #define hid_notice_once(hid, fmt, ...)                  \
1234         dev_notice_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1235 #define hid_warn_once(hid, fmt, ...)                    \
1236         dev_warn_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1237 #define hid_info_once(hid, fmt, ...)                    \
1238         dev_info_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1239 #define hid_dbg_once(hid, fmt, ...)                     \
1240         dev_dbg_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1241
1242 #endif