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 <[email protected]>, 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
  30 /*
  31  * We parse each description item into this structure. Short items data
  32  * values are expanded to 32-bit signed int, long items contain a pointer
  33  * into the data area.
  34  */
  35
  36 struct hid_item {
  37         unsigned  format;
  38         __u8      size;
  39         __u8      type;
  40         __u8      tag;
  41         union {
  42             __u8   u8;
  43             __s8   s8;
  44             __u16  u16;
  45             __s16  s16;
  46             __u32  u32;
  47             __s32  s32;
  48             __u8  *longdata;
  49         } data;
  50 };
  51
  52 /*
  53  * HID report item format
  54  */
  55
  56 #define HID_ITEM_FORMAT_SHORT   0
  57 #define HID_ITEM_FORMAT_LONG    1
  58
  59 /*
  60  * Special tag indicating long items
  61  */
  62
  63 #define HID_ITEM_TAG_LONG       15
  64
  65 /*
  66  * HID report descriptor item type (prefix bit 2,3)
  67  */
  68
  69 #define HID_ITEM_TYPE_MAIN              0
  70 #define HID_ITEM_TYPE_GLOBAL            1
  71 #define HID_ITEM_TYPE_LOCAL             2
  72 #define HID_ITEM_TYPE_RESERVED          3
  73
  74 /*
  75  * HID report descriptor main item tags
  76  */
  77
  78 #define HID_MAIN_ITEM_TAG_INPUT                 8
  79 #define HID_MAIN_ITEM_TAG_OUTPUT                9
  80 #define HID_MAIN_ITEM_TAG_FEATURE               11
  81 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
  82 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
  83
  84 /*
  85  * HID report descriptor main item contents
  86  */
  87
  88 #define HID_MAIN_ITEM_CONSTANT          0x001
  89 #define HID_MAIN_ITEM_VARIABLE          0x002
  90 #define HID_MAIN_ITEM_RELATIVE          0x004
  91 #define HID_MAIN_ITEM_WRAP              0x008
  92 #define HID_MAIN_ITEM_NONLINEAR         0x010
  93 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
  94 #define HID_MAIN_ITEM_NULL_STATE        0x040
  95 #define HID_MAIN_ITEM_VOLATILE          0x080
  96 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
  97
  98 /*
  99  * HID report descriptor collection item types
 100  */
 101
 102 #define HID_COLLECTION_PHYSICAL         0
 103 #define HID_COLLECTION_APPLICATION      1
 104 #define HID_COLLECTION_LOGICAL          2
 105
 106 /*
 107  * HID report descriptor global item tags
 108  */
 109
 110 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 111 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 112 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 113 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 114 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 115 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 116 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 117 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 118 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 119 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 120 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 121 #define HID_GLOBAL_ITEM_TAG_POP                 11
 122
 123 /*
 124  * HID report descriptor local item tags
 125  */
 126
 127 #define HID_LOCAL_ITEM_TAG_USAGE                0
 128 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 129 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 130 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 131 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 132 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 133 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 134 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 135 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 136 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 137
 138 /*
 139  * HID usage tables
 140  */
 141
 142 #define HID_USAGE_PAGE          0xffff0000
 143
 144 #define HID_UP_UNDEFINED        0x00000000
 145 #define HID_UP_GENDESK          0x00010000
 146 #define HID_UP_SIMULATION       0x00020000
 147 #define HID_UP_GENDEVCTRLS      0x00060000
 148 #define HID_UP_KEYBOARD         0x00070000
 149 #define HID_UP_LED              0x00080000
 150 #define HID_UP_BUTTON           0x00090000
 151 #define HID_UP_ORDINAL          0x000a0000
 152 #define HID_UP_TELEPHONY        0x000b0000
 153 #define HID_UP_CONSUMER         0x000c0000
 154 #define HID_UP_DIGITIZER        0x000d0000
 155 #define HID_UP_PID              0x000f0000
 156 #define HID_UP_HPVENDOR         0xff7f0000
 157 #define HID_UP_HPVENDOR2        0xff010000
 158 #define HID_UP_MSVENDOR         0xff000000
 159 #define HID_UP_CUSTOM           0x00ff0000
 160 #define HID_UP_LOGIVENDOR       0xffbc0000
 161 #define HID_UP_LOGIVENDOR2   0xff090000
 162 #define HID_UP_LOGIVENDOR3   0xff430000
 163 #define HID_UP_LNVENDOR         0xffa00000
 164 #define HID_UP_SENSOR           0x00200000
 165 #define HID_UP_ASUSVENDOR       0xff310000
 166 #define HID_UP_GOOGLEVENDOR     0xffd10000
 167
 168 #define HID_USAGE               0x0000ffff
 169
 170 #define HID_GD_POINTER          0x00010001
 171 #define HID_GD_MOUSE            0x00010002
 172 #define HID_GD_JOYSTICK         0x00010004
 173 #define HID_GD_GAMEPAD          0x00010005
 174 #define HID_GD_KEYBOARD         0x00010006
 175 #define HID_GD_KEYPAD           0x00010007
 176 #define HID_GD_MULTIAXIS        0x00010008
 177 /*
 178  * Microsoft Win8 Wireless Radio Controls extensions CA, see:
 179  * http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
 180  */
 181 #define HID_GD_WIRELESS_RADIO_CTLS      0x0001000c
 182 /*
 183  * System Multi-Axis, see:
 184  * http://www.usb.org/developers/hidpage/HUTRR62_-_Generic_Desktop_CA_for_System_Multi-Axis_Controllers.txt
 185  */
 186 #define HID_GD_SYSTEM_MULTIAXIS 0x0001000e
 187
 188 #define HID_GD_X                0x00010030
 189 #define HID_GD_Y                0x00010031
 190 #define HID_GD_Z                0x00010032
 191 #define HID_GD_RX               0x00010033
 192 #define HID_GD_RY               0x00010034
 193 #define HID_GD_RZ               0x00010035
 194 #define HID_GD_SLIDER           0x00010036
 195 #define HID_GD_DIAL             0x00010037
 196 #define HID_GD_WHEEL            0x00010038
 197 #define HID_GD_HATSWITCH        0x00010039
 198 #define HID_GD_BUFFER           0x0001003a
 199 #define HID_GD_BYTECOUNT        0x0001003b
 200 #define HID_GD_MOTION           0x0001003c
 201 #define HID_GD_START            0x0001003d
 202 #define HID_GD_SELECT           0x0001003e
 203 #define HID_GD_VX               0x00010040
 204 #define HID_GD_VY               0x00010041
 205 #define HID_GD_VZ               0x00010042
 206 #define HID_GD_VBRX             0x00010043
 207 #define HID_GD_VBRY             0x00010044
 208 #define HID_GD_VBRZ             0x00010045
 209 #define HID_GD_VNO              0x00010046
 210 #define HID_GD_FEATURE          0x00010047
 211 #define HID_GD_RESOLUTION_MULTIPLIER    0x00010048
 212 #define HID_GD_SYSTEM_CONTROL   0x00010080
 213 #define HID_GD_UP               0x00010090
 214 #define HID_GD_DOWN             0x00010091
 215 #define HID_GD_RIGHT            0x00010092
 216 #define HID_GD_LEFT             0x00010093
 217 /* Microsoft Win8 Wireless Radio Controls CA usage codes */
 218 #define HID_GD_RFKILL_BTN       0x000100c6
 219 #define HID_GD_RFKILL_LED       0x000100c7
 220 #define HID_GD_RFKILL_SWITCH    0x000100c8
 221
 222 #define HID_DC_BATTERYSTRENGTH  0x00060020
 223
 224 #define HID_CP_CONSUMER_CONTROL 0x000c0001
 225 #define HID_CP_AC_PAN           0x000c0238
 226
 227 #define HID_DG_DIGITIZER        0x000d0001
 228 #define HID_DG_PEN              0x000d0002
 229 #define HID_DG_LIGHTPEN         0x000d0003
 230 #define HID_DG_TOUCHSCREEN      0x000d0004
 231 #define HID_DG_TOUCHPAD         0x000d0005
 232 #define HID_DG_WHITEBOARD       0x000d0006
 233 #define HID_DG_STYLUS           0x000d0020
 234 #define HID_DG_PUCK             0x000d0021
 235 #define HID_DG_FINGER           0x000d0022
 236 #define HID_DG_TIPPRESSURE      0x000d0030
 237 #define HID_DG_BARRELPRESSURE   0x000d0031
 238 #define HID_DG_INRANGE          0x000d0032
 239 #define HID_DG_TOUCH            0x000d0033
 240 #define HID_DG_UNTOUCH          0x000d0034
 241 #define HID_DG_TAP              0x000d0035
 242 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 243 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 244 #define HID_DG_BATTERYSTRENGTH  0x000d003b
 245 #define HID_DG_INVERT           0x000d003c
 246 #define HID_DG_TILT_X           0x000d003d
 247 #define HID_DG_TILT_Y           0x000d003e
 248 #define HID_DG_TWIST            0x000d0041
 249 #define HID_DG_TIPSWITCH        0x000d0042
 250 #define HID_DG_TIPSWITCH2       0x000d0043
 251 #define HID_DG_BARRELSWITCH     0x000d0044
 252 #define HID_DG_ERASER           0x000d0045
 253 #define HID_DG_TABLETPICK       0x000d0046
 254
 255 #define HID_CP_CONSUMERCONTROL  0x000c0001
 256 #define HID_CP_NUMERICKEYPAD    0x000c0002
 257 #define HID_CP_PROGRAMMABLEBUTTONS      0x000c0003
 258 #define HID_CP_MICROPHONE       0x000c0004
 259 #define HID_CP_HEADPHONE        0x000c0005
 260 #define HID_CP_GRAPHICEQUALIZER 0x000c0006
 261 #define HID_CP_FUNCTIONBUTTONS  0x000c0036
 262 #define HID_CP_SELECTION        0x000c0080
 263 #define HID_CP_MEDIASELECTION   0x000c0087
 264 #define HID_CP_SELECTDISC       0x000c00ba
 265 #define HID_CP_PLAYBACKSPEED    0x000c00f1
 266 #define HID_CP_PROXIMITY        0x000c0109
 267 #define HID_CP_SPEAKERSYSTEM    0x000c0160
 268 #define HID_CP_CHANNELLEFT      0x000c0161
 269 #define HID_CP_CHANNELRIGHT     0x000c0162
 270 #define HID_CP_CHANNELCENTER    0x000c0163
 271 #define HID_CP_CHANNELFRONT     0x000c0164
 272 #define HID_CP_CHANNELCENTERFRONT       0x000c0165
 273 #define HID_CP_CHANNELSIDE      0x000c0166
 274 #define HID_CP_CHANNELSURROUND  0x000c0167
 275 #define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT   0x000c0168
 276 #define HID_CP_CHANNELTOP       0x000c0169
 277 #define HID_CP_CHANNELUNKNOWN   0x000c016a
 278 #define HID_CP_APPLICATIONLAUNCHBUTTONS 0x000c0180
 279 #define HID_CP_GENERICGUIAPPLICATIONCONTROLS    0x000c0200
 280
 281 #define HID_DG_DEVICECONFIG     0x000d000e
 282 #define HID_DG_DEVICESETTINGS   0x000d0023
 283 #define HID_DG_AZIMUTH          0x000d003f
 284 #define HID_DG_CONFIDENCE       0x000d0047
 285 #define HID_DG_WIDTH            0x000d0048
 286 #define HID_DG_HEIGHT           0x000d0049
 287 #define HID_DG_CONTACTID        0x000d0051
 288 #define HID_DG_INPUTMODE        0x000d0052
 289 #define HID_DG_DEVICEINDEX      0x000d0053
 290 #define HID_DG_CONTACTCOUNT     0x000d0054
 291 #define HID_DG_CONTACTMAX       0x000d0055
 292 #define HID_DG_SCANTIME         0x000d0056
 293 #define HID_DG_SURFACESWITCH    0x000d0057
 294 #define HID_DG_BUTTONSWITCH     0x000d0058
 295 #define HID_DG_BUTTONTYPE       0x000d0059
 296 #define HID_DG_BARRELSWITCH2    0x000d005a
 297 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
 298 #define HID_DG_LATENCYMODE      0x000d0060
 299
 300 #define HID_VD_ASUS_CUSTOM_MEDIA_KEYS   0xff310076
 301 /*
 302  * HID report types --- Ouch! HID spec says 1 2 3!
 303  */
 304
 305 #define HID_INPUT_REPORT        0
 306 #define HID_OUTPUT_REPORT       1
 307 #define HID_FEATURE_REPORT      2
 308
 309 #define HID_REPORT_TYPES        3
 310
 311 /*
 312  * HID connect requests
 313  */
 314
 315 #define HID_CONNECT_HIDINPUT            BIT(0)
 316 #define HID_CONNECT_HIDINPUT_FORCE      BIT(1)
 317 #define HID_CONNECT_HIDRAW              BIT(2)
 318 #define HID_CONNECT_HIDDEV              BIT(3)
 319 #define HID_CONNECT_HIDDEV_FORCE        BIT(4)
 320 #define HID_CONNECT_FF                  BIT(5)
 321 #define HID_CONNECT_DRIVER              BIT(6)
 322 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 323                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 324
 325 /*
 326  * HID device quirks.
 327  */
 328
 329 /*
 330  * Increase this if you need to configure more HID quirks at module load time
 331  */
 332 #define MAX_USBHID_BOOT_QUIRKS 4
 333
 334 #define HID_QUIRK_INVERT                        BIT(0)
 335 #define HID_QUIRK_NOTOUCH                       BIT(1)
 336 #define HID_QUIRK_IGNORE                        BIT(2)
 337 #define HID_QUIRK_NOGET                         BIT(3)
 338 #define HID_QUIRK_HIDDEV_FORCE                  BIT(4)
 339 #define HID_QUIRK_BADPAD                        BIT(5)
 340 #define HID_QUIRK_MULTI_INPUT                   BIT(6)
 341 #define HID_QUIRK_HIDINPUT_FORCE                BIT(7)
 342 /* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
 343 /* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
 344 #define HID_QUIRK_ALWAYS_POLL                   BIT(10)
 345 #define HID_QUIRK_INPUT_PER_APP                 BIT(11)
 346 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           BIT(16)
 347 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         BIT(17)
 348 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  BIT(18)
 349 #define HID_QUIRK_HAVE_SPECIAL_DRIVER           BIT(19)
 350 #define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE  BIT(20)
 351 #define HID_QUIRK_FULLSPEED_INTERVAL            BIT(28)
 352 #define HID_QUIRK_NO_INIT_REPORTS               BIT(29)
 353 #define HID_QUIRK_NO_IGNORE                     BIT(30)
 354 #define HID_QUIRK_NO_INPUT_SYNC                 BIT(31)
 355
 356 /*
 357  * HID device groups
 358  *
 359  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
 360  * and has a value of 0x0000
 361  */
 362 #define HID_GROUP_GENERIC                       0x0001
 363 #define HID_GROUP_MULTITOUCH                    0x0002
 364 #define HID_GROUP_SENSOR_HUB                    0x0003
 365 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
 366
 367 /*
 368  * Vendor specific HID device groups
 369  */
 370 #define HID_GROUP_RMI                           0x0100
 371 #define HID_GROUP_WACOM                         0x0101
 372 #define HID_GROUP_LOGITECH_DJ_DEVICE            0x0102
 373 #define HID_GROUP_STEAM                         0x0103
 374 #define HID_GROUP_LOGITECH_27MHZ_DEVICE         0x0104
 375 #define HID_GROUP_VIVALDI                       0x0105
 376
 377 /*
 378  * HID protocol status
 379  */
 380 #define HID_REPORT_PROTOCOL     1
 381 #define HID_BOOT_PROTOCOL       0
 382
 383 /*
 384  * This is the global environment of the parser. This information is
 385  * persistent for main-items. The global environment can be saved and
 386  * restored with PUSH/POP statements.
 387  */
 388
 389 struct hid_global {
 390         unsigned usage_page;
 391         __s32    logical_minimum;
 392         __s32    logical_maximum;
 393         __s32    physical_minimum;
 394         __s32    physical_maximum;
 395         __s32    unit_exponent;
 396         unsigned unit;
 397         unsigned report_id;
 398         unsigned report_size;
 399         unsigned report_count;
 400 };
 401
 402 /*
 403  * This is the local environment. It is persistent up the next main-item.
 404  */
 405
 406 #define HID_MAX_USAGES                  12288
 407 #define HID_DEFAULT_NUM_COLLECTIONS     16
 408
 409 struct hid_local {
 410         unsigned usage[HID_MAX_USAGES]; /* usage array */
 411         u8 usage_size[HID_MAX_USAGES]; /* usage size array */
 412         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 413         unsigned usage_index;
 414         unsigned usage_minimum;
 415         unsigned delimiter_depth;
 416         unsigned delimiter_branch;
 417 };
 418
 419 /*
 420  * This is the collection stack. We climb up the stack to determine
 421  * application and function of each field.
 422  */
 423
 424 struct hid_collection {
 425         int parent_idx; /* device->collection */
 426         unsigned type;
 427         unsigned usage;
 428         unsigned level;
 429 };
 430
 431 struct hid_usage {
 432         unsigned  hid;                  /* hid usage code */
 433         unsigned  collection_index;     /* index into collection array */
 434         unsigned  usage_index;          /* index into usage array */
 435         __s8      resolution_multiplier;/* Effective Resolution Multiplier
 436                                            (HUT v1.12, 4.3.1), default: 1 */
 437         /* hidinput data */
 438         __s8      wheel_factor;         /* 120/resolution_multiplier */
 439         __u16     code;                 /* input driver code */
 440         __u8      type;                 /* input driver type */
 441         __s8      hat_min;              /* hat switch fun */
 442         __s8      hat_max;              /* ditto */
 443         __s8      hat_dir;              /* ditto */
 444         __s16     wheel_accumulated;    /* hi-res wheel */
 445 };
 446
 447 struct hid_input;
 448
 449 struct hid_field {
 450         unsigned  physical;             /* physical usage for this field */
 451         unsigned  logical;              /* logical usage for this field */
 452         unsigned  application;          /* application usage for this field */
 453         struct hid_usage *usage;        /* usage table for this function */
 454         unsigned  maxusage;             /* maximum usage index */
 455         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 456         unsigned  report_offset;        /* bit offset in the report */
 457         unsigned  report_size;          /* size of this field in the report */
 458         unsigned  report_count;         /* number of this field in the report */
 459         unsigned  report_type;          /* (input,output,feature) */
 460         __s32    *value;                /* last known value(s) */
 461         __s32     logical_minimum;
 462         __s32     logical_maximum;
 463         __s32     physical_minimum;
 464         __s32     physical_maximum;
 465         __s32     unit_exponent;
 466         unsigned  unit;
 467         struct hid_report *report;      /* associated report */
 468         unsigned index;                 /* index into report->field[] */
 469         /* hidinput data */
 470         struct hid_input *hidinput;     /* associated input structure */
 471         __u16 dpad;                     /* dpad input code */
 472 };
 473
 474 #define HID_MAX_FIELDS 256
 475
 476 struct hid_report {
 477         struct list_head list;
 478         struct list_head hidinput_list;
 479         unsigned int id;                                /* id of this report */
 480         unsigned int type;                              /* report type */
 481         unsigned int application;                       /* application usage for this report */
 482         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 483         unsigned maxfield;                              /* maximum valid field index */
 484         unsigned size;                                  /* size of the report (bits) */
 485         struct hid_device *device;                      /* associated device */
 486 };
 487
 488 #define HID_MAX_IDS 256
 489
 490 struct hid_report_enum {
 491         unsigned numbered;
 492         struct list_head report_list;
 493         struct hid_report *report_id_hash[HID_MAX_IDS];
 494 };
 495
 496 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 497 #define HID_MAX_BUFFER_SIZE     8192            /* 8kb */
 498 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 499 #define HID_OUTPUT_FIFO_SIZE    64
 500
 501 struct hid_control_fifo {
 502         unsigned char dir;
 503         struct hid_report *report;
 504         char *raw_report;
 505 };
 506
 507 struct hid_output_fifo {
 508         struct hid_report *report;
 509         char *raw_report;
 510 };
 511
 512 #define HID_CLAIMED_INPUT       BIT(0)
 513 #define HID_CLAIMED_HIDDEV      BIT(1)
 514 #define HID_CLAIMED_HIDRAW      BIT(2)
 515 #define HID_CLAIMED_DRIVER      BIT(3)
 516
 517 #define HID_STAT_ADDED          BIT(0)
 518 #define HID_STAT_PARSED         BIT(1)
 519 #define HID_STAT_DUP_DETECTED   BIT(2)
 520 #define HID_STAT_REPROBED       BIT(3)
 521
 522 struct hid_input {
 523         struct list_head list;
 524         struct hid_report *report;
 525         struct input_dev *input;
 526         const char *name;
 527         bool registered;
 528         struct list_head reports;       /* the list of reports */
 529         unsigned int application;       /* application usage for this input */
 530 };
 531
 532 enum hid_type {
 533         HID_TYPE_OTHER = 0,
 534         HID_TYPE_USBMOUSE,
 535         HID_TYPE_USBNONE
 536 };
 537
 538 enum hid_battery_status {
 539         HID_BATTERY_UNKNOWN = 0,
 540         HID_BATTERY_QUERIED,            /* Kernel explicitly queried battery strength */
 541         HID_BATTERY_REPORTED,           /* Device sent unsolicited battery strength report */
 542 };
 543
 544 struct hid_driver;
 545 struct hid_ll_driver;
 546
 547 struct hid_device {                                                     /* device report descriptor */
 548         __u8 *dev_rdesc;
 549         unsigned dev_rsize;
 550         __u8 *rdesc;
 551         unsigned rsize;
 552         struct hid_collection *collection;                              /* List of HID collections */
 553         unsigned collection_size;                                       /* Number of allocated hid_collections */
 554         unsigned maxcollection;                                         /* Number of parsed collections */
 555         unsigned maxapplication;                                        /* Number of applications */
 556         __u16 bus;                                                      /* BUS ID */
 557         __u16 group;                                                    /* Report group */
 558         __u32 vendor;                                                   /* Vendor ID */
 559         __u32 product;                                                  /* Product ID */
 560         __u32 version;                                                  /* HID version */
 561         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 562         unsigned country;                                               /* HID country */
 563         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 564         struct work_struct led_work;                                    /* delayed LED worker */
 565
 566         struct semaphore driver_input_lock;                             /* protects the current driver */
 567         struct device dev;                                              /* device */
 568         struct hid_driver *driver;
 569
 570         struct hid_ll_driver *ll_driver;
 571         struct mutex ll_open_lock;
 572         unsigned int ll_open_count;
 573
 574 #ifdef CONFIG_HID_BATTERY_STRENGTH
 575         /*
 576          * Power supply information for HID devices which report
 577          * battery strength. power_supply was successfully registered if
 578          * battery is non-NULL.
 579          */
 580         struct power_supply *battery;
 581         __s32 battery_capacity;
 582         __s32 battery_min;
 583         __s32 battery_max;
 584         __s32 battery_report_type;
 585         __s32 battery_report_id;
 586         enum hid_battery_status battery_status;
 587         bool battery_avoid_query;
 588 #endif
 589
 590         unsigned long status;                                           /* see STAT flags above */
 591         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 592         unsigned quirks;                                                /* Various quirks the device can pull on us */
 593         bool io_started;                                                /* If IO has started */
 594
 595         struct list_head inputs;                                        /* The list of inputs */
 596         void *hiddev;                                                   /* The hiddev structure */
 597         void *hidraw;
 598
 599         char name[128];                                                 /* Device name */
 600         char phys[64];                                                  /* Device physical location */
 601         char uniq[64];                                                  /* Device unique identifier (serial #) */
 602
 603         void *driver_data;
 604
 605         /* temporary hid_ff handling (until moved to the drivers) */
 606         int (*ff_init)(struct hid_device *);
 607
 608         /* hiddev event handler */
 609         int (*hiddev_connect)(struct hid_device *, unsigned int);
 610         void (*hiddev_disconnect)(struct hid_device *);
 611         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 612                                   struct hid_usage *, __s32);
 613         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 614
 615         /* debugging support via debugfs */
 616         unsigned short debug;
 617         struct dentry *debug_dir;
 618         struct dentry *debug_rdesc;
 619         struct dentry *debug_events;
 620         struct list_head debug_list;
 621         spinlock_t  debug_list_lock;
 622         wait_queue_head_t debug_wait;
 623 };
 624
 625 #define to_hid_device(pdev) \
 626         container_of(pdev, struct hid_device, dev)
 627
 628 static inline void *hid_get_drvdata(struct hid_device *hdev)
 629 {
 630         return dev_get_drvdata(&hdev->dev);
 631 }
 632
 633 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 634 {
 635         dev_set_drvdata(&hdev->dev, data);
 636 }
 637
 638 #define HID_GLOBAL_STACK_SIZE 4
 639 #define HID_COLLECTION_STACK_SIZE 4
 640
 641 #define HID_SCAN_FLAG_MT_WIN_8                  BIT(0)
 642 #define HID_SCAN_FLAG_VENDOR_SPECIFIC           BIT(1)
 643 #define HID_SCAN_FLAG_GD_POINTER                BIT(2)
 644
 645 struct hid_parser {
 646         struct hid_global     global;
 647         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 648         unsigned int          global_stack_ptr;
 649         struct hid_local      local;
 650         unsigned int         *collection_stack;
 651         unsigned int          collection_stack_ptr;
 652         unsigned int          collection_stack_size;
 653         struct hid_device    *device;
 654         unsigned int          scan_flags;
 655 };
 656
 657 struct hid_class_descriptor {
 658         __u8  bDescriptorType;
 659         __le16 wDescriptorLength;
 660 } __attribute__ ((packed));
 661
 662 struct hid_descriptor {
 663         __u8  bLength;
 664         __u8  bDescriptorType;
 665         __le16 bcdHID;
 666         __u8  bCountryCode;
 667         __u8  bNumDescriptors;
 668
 669         struct hid_class_descriptor desc[1];
 670 } __attribute__ ((packed));
 671
 672 #define HID_DEVICE(b, g, ven, prod)                                     \
 673         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 674 #define HID_USB_DEVICE(ven, prod)                               \
 675         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 676 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 677         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 678 #define HID_I2C_DEVICE(ven, prod)                               \
 679         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
 680
 681 #define HID_REPORT_ID(rep) \
 682         .report_type = (rep)
 683 #define HID_USAGE_ID(uhid, utype, ucode) \
 684         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 685 /* we don't want to catch types and codes equal to 0 */
 686 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 687
 688 struct hid_report_id {
 689         __u32 report_type;
 690 };
 691 struct hid_usage_id {
 692         __u32 usage_hid;
 693         __u32 usage_type;
 694         __u32 usage_code;
 695 };
 696
 697 /**
 698  * struct hid_driver
 699  * @name: driver name (e.g. "Footech_bar-wheel")
 700  * @id_table: which devices is this driver for (must be non-NULL for probe
 701  *            to be called)
 702  * @dyn_list: list of dynamically added device ids
 703  * @dyn_lock: lock protecting @dyn_list
 704  * @match: check if the given device is handled by this driver
 705  * @probe: new device inserted
 706  * @remove: device removed (NULL if not a hot-plug capable driver)
 707  * @report_table: on which reports to call raw_event (NULL means all)
 708  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 709  * @usage_table: on which events to call event (NULL means all)
 710  * @event: if usage in usage_table, this hook is called (NULL means nop)
 711  * @report: this hook is called after parsing a report (NULL means nop)
 712  * @report_fixup: called before report descriptor parsing (NULL means nop)
 713  * @input_mapping: invoked on input registering before mapping an usage
 714  * @input_mapped: invoked on input registering after mapping an usage
 715  * @input_configured: invoked just before the device is registered
 716  * @feature_mapping: invoked on feature registering
 717  * @suspend: invoked on suspend (NULL means nop)
 718  * @resume: invoked on resume if device was not reset (NULL means nop)
 719  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 720  *
 721  * probe should return -errno on error, or 0 on success. During probe,
 722  * input will not be passed to raw_event unless hid_device_io_start is
 723  * called.
 724  *
 725  * raw_event and event should return negative on error, any other value will
 726  * pass the event on to .event() typically return 0 for success.
 727  *
 728  * input_mapping shall return a negative value to completely ignore this usage
 729  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 730  * usage by generic code (no special handling needed) or positive to skip
 731  * generic parsing (needed special handling which was done in the hook already)
 732  * input_mapped shall return negative to inform the layer that this usage
 733  * should not be considered for further processing or zero to notify that
 734  * no processing was performed and should be done in a generic manner
 735  * Both these functions may be NULL which means the same behavior as returning
 736  * zero from them.
 737  */
 738 struct hid_driver {
 739         char *name;
 740         const struct hid_device_id *id_table;
 741
 742         struct list_head dyn_list;
 743         spinlock_t dyn_lock;
 744
 745         bool (*match)(struct hid_device *dev, bool ignore_special_driver);
 746         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 747         void (*remove)(struct hid_device *dev);
 748
 749         const struct hid_report_id *report_table;
 750         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 751                         u8 *data, int size);
 752         const struct hid_usage_id *usage_table;
 753         int (*event)(struct hid_device *hdev, struct hid_field *field,
 754                         struct hid_usage *usage, __s32 value);
 755         void (*report)(struct hid_device *hdev, struct hid_report *report);
 756
 757         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 758                         unsigned int *size);
 759
 760         int (*input_mapping)(struct hid_device *hdev,
 761                         struct hid_input *hidinput, struct hid_field *field,
 762                         struct hid_usage *usage, unsigned long **bit, int *max);
 763         int (*input_mapped)(struct hid_device *hdev,
 764                         struct hid_input *hidinput, struct hid_field *field,
 765                         struct hid_usage *usage, unsigned long **bit, int *max);
 766         int (*input_configured)(struct hid_device *hdev,
 767                                 struct hid_input *hidinput);
 768         void (*feature_mapping)(struct hid_device *hdev,
 769                         struct hid_field *field,
 770                         struct hid_usage *usage);
 771 #ifdef CONFIG_PM
 772         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 773         int (*resume)(struct hid_device *hdev);
 774         int (*reset_resume)(struct hid_device *hdev);
 775 #endif
 776 /* private: */
 777         struct device_driver driver;
 778 };
 779
 780 #define to_hid_driver(pdrv) \
 781         container_of(pdrv, struct hid_driver, driver)
 782
 783 /**
 784  * hid_ll_driver - low level driver callbacks
 785  * @start: called on probe to start the device
 786  * @stop: called on remove
 787  * @open: called by input layer on open
 788  * @close: called by input layer on close
 789  * @power: request underlying hardware to enter requested power mode
 790  * @parse: this method is called only once to parse the device data,
 791  *         shouldn't allocate anything to not leak memory
 792  * @request: send report request to device (e.g. feature report)
 793  * @wait: wait for buffered io to complete (send/recv reports)
 794  * @raw_request: send raw report request to device (e.g. feature report)
 795  * @output_report: send output report to device
 796  * @idle: send idle request to device
 797  */
 798 struct hid_ll_driver {
 799         int (*start)(struct hid_device *hdev);
 800         void (*stop)(struct hid_device *hdev);
 801
 802         int (*open)(struct hid_device *hdev);
 803         void (*close)(struct hid_device *hdev);
 804
 805         int (*power)(struct hid_device *hdev, int level);
 806
 807         int (*parse)(struct hid_device *hdev);
 808
 809         void (*request)(struct hid_device *hdev,
 810                         struct hid_report *report, int reqtype);
 811
 812         int (*wait)(struct hid_device *hdev);
 813
 814         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
 815                             __u8 *buf, size_t len, unsigned char rtype,
 816                             int reqtype);
 817
 818         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 819
 820         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 821 };
 822
 823 extern struct hid_ll_driver i2c_hid_ll_driver;
 824 extern struct hid_ll_driver hidp_hid_driver;
 825 extern struct hid_ll_driver uhid_hid_driver;
 826 extern struct hid_ll_driver usb_hid_driver;
 827
 828 static inline bool hid_is_using_ll_driver(struct hid_device *hdev,
 829                 struct hid_ll_driver *driver)
 830 {
 831         return hdev->ll_driver == driver;
 832 }
 833
 834 #define PM_HINT_FULLON  1<<5
 835 #define PM_HINT_NORMAL  1<<1
 836
 837 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 838 /* We ignore a few input applications that are not widely used */
 839 #define IS_INPUT_APPLICATION(a) \
 840                 (((a >= HID_UP_GENDESK) && (a <= HID_GD_MULTIAXIS)) \
 841                 || ((a >= HID_DG_PEN) && (a <= HID_DG_WHITEBOARD)) \
 842                 || (a == HID_GD_SYSTEM_CONTROL) || (a == HID_CP_CONSUMER_CONTROL) \
 843                 || (a == HID_GD_WIRELESS_RADIO_CTLS))
 844
 845 /* HID core API */
 846
 847 extern int hid_debug;
 848
 849 extern bool hid_ignore(struct hid_device *);
 850 extern int hid_add_device(struct hid_device *);
 851 extern void hid_destroy_device(struct hid_device *);
 852
 853 extern struct bus_type hid_bus_type;
 854
 855 extern int __must_check __hid_register_driver(struct hid_driver *,
 856                 struct module *, const char *mod_name);
 857
 858 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 859 #define hid_register_driver(driver) \
 860         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 861
 862 extern void hid_unregister_driver(struct hid_driver *);
 863
 864 /**
 865  * module_hid_driver() - Helper macro for registering a HID driver
 866  * @__hid_driver: hid_driver struct
 867  *
 868  * Helper macro for HID drivers which do not do anything special in module
 869  * init/exit. This eliminates a lot of boilerplate. Each module may only
 870  * use this macro once, and calling it replaces module_init() and module_exit()
 871  */
 872 #define module_hid_driver(__hid_driver) \
 873         module_driver(__hid_driver, hid_register_driver, \
 874                       hid_unregister_driver)
 875
 876 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 877 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 878 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 879 extern void hidinput_disconnect(struct hid_device *);
 880
 881 int hid_set_field(struct hid_field *, unsigned, __s32);
 882 int hid_input_report(struct hid_device *, int type, u8 *, u32, int);
 883 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 884 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 885 unsigned int hidinput_count_leds(struct hid_device *hid);
 886 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 887 void hid_output_report(struct hid_report *report, __u8 *data);
 888 int __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
 889 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 890 struct hid_device *hid_allocate_device(void);
 891 struct hid_report *hid_register_report(struct hid_device *device,
 892                                        unsigned int type, unsigned int id,
 893                                        unsigned int application);
 894 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 895 struct hid_report *hid_validate_values(struct hid_device *hid,
 896                                        unsigned int type, unsigned int id,
 897                                        unsigned int field_index,
 898                                        unsigned int report_counts);
 899
 900 void hid_setup_resolution_multiplier(struct hid_device *hid);
 901 int hid_open_report(struct hid_device *device);
 902 int hid_check_keys_pressed(struct hid_device *hid);
 903 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 904 void hid_disconnect(struct hid_device *hid);
 905 bool hid_match_one_id(const struct hid_device *hdev,
 906                       const struct hid_device_id *id);
 907 const struct hid_device_id *hid_match_id(const struct hid_device *hdev,
 908                                          const struct hid_device_id *id);
 909 const struct hid_device_id *hid_match_device(struct hid_device *hdev,
 910                                              struct hid_driver *hdrv);
 911 bool hid_compare_device_paths(struct hid_device *hdev_a,
 912                               struct hid_device *hdev_b, char separator);
 913 s32 hid_snto32(__u32 value, unsigned n);
 914 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
 915                      unsigned offset, unsigned n);
 916
 917 /**
 918  * hid_device_io_start - enable HID input during probe, remove
 919  *
 920  * @hid - the device
 921  *
 922  * This should only be called during probe or remove and only be
 923  * called by the thread calling probe or remove. It will allow
 924  * incoming packets to be delivered to the driver.
 925  */
 926 static inline void hid_device_io_start(struct hid_device *hid) {
 927         if (hid->io_started) {
 928                 dev_warn(&hid->dev, "io already started\n");
 929                 return;
 930         }
 931         hid->io_started = true;
 932         up(&hid->driver_input_lock);
 933 }
 934
 935 /**
 936  * hid_device_io_stop - disable HID input during probe, remove
 937  *
 938  * @hid - the device
 939  *
 940  * Should only be called after hid_device_io_start. It will prevent
 941  * incoming packets from going to the driver for the duration of
 942  * probe, remove. If called during probe, packets will still go to the
 943  * driver after probe is complete. This function should only be called
 944  * by the thread calling probe or remove.
 945  */
 946 static inline void hid_device_io_stop(struct hid_device *hid) {
 947         if (!hid->io_started) {
 948                 dev_warn(&hid->dev, "io already stopped\n");
 949                 return;
 950         }
 951         hid->io_started = false;
 952         down(&hid->driver_input_lock);
 953 }
 954
 955 /**
 956  * hid_map_usage - map usage input bits
 957  *
 958  * @hidinput: hidinput which we are interested in
 959  * @usage: usage to fill in
 960  * @bit: pointer to input->{}bit (out parameter)
 961  * @max: maximal valid usage->code to consider later (out parameter)
 962  * @type: input event type (EV_KEY, EV_REL, ...)
 963  * @c: code which corresponds to this usage and type
 964  *
 965  * The value pointed to by @bit will be set to NULL if either @type is
 966  * an unhandled event type, or if @c is out of range for @type. This
 967  * can be used as an error condition.
 968  */
 969 static inline void hid_map_usage(struct hid_input *hidinput,
 970                 struct hid_usage *usage, unsigned long **bit, int *max,
 971                 __u8 type, unsigned int c)
 972 {
 973         struct input_dev *input = hidinput->input;
 974         unsigned long *bmap = NULL;
 975         unsigned int limit = 0;
 976
 977         switch (type) {
 978         case EV_ABS:
 979                 bmap = input->absbit;
 980                 limit = ABS_MAX;
 981                 break;
 982         case EV_REL:
 983                 bmap = input->relbit;
 984                 limit = REL_MAX;
 985                 break;
 986         case EV_KEY:
 987                 bmap = input->keybit;
 988                 limit = KEY_MAX;
 989                 break;
 990         case EV_LED:
 991                 bmap = input->ledbit;
 992                 limit = LED_MAX;
 993                 break;
 994         }
 995
 996         if (unlikely(c > limit || !bmap)) {
 997                 pr_warn_ratelimited("%s: Invalid code %d type %d\n",
 998                                     input->name, c, type);
 999                 *bit = NULL;
1000                 return;
1001         }
1002
1003         usage->type = type;
1004         usage->code = c;
1005         *max = limit;
1006         *bit = bmap;
1007 }
1008
1009 /**
1010  * hid_map_usage_clear - map usage input bits and clear the input bit
1011  *
1012  * The same as hid_map_usage, except the @c bit is also cleared in supported
1013  * bits (@bit).
1014  */
1015 static inline void hid_map_usage_clear(struct hid_input *hidinput,
1016                 struct hid_usage *usage, unsigned long **bit, int *max,
1017                 __u8 type, __u16 c)
1018 {
1019         hid_map_usage(hidinput, usage, bit, max, type, c);
1020         if (*bit)
1021                 clear_bit(usage->code, *bit);
1022 }
1023
1024 /**
1025  * hid_parse - parse HW reports
1026  *
1027  * @hdev: hid device
1028  *
1029  * Call this from probe after you set up the device (if needed). Your
1030  * report_fixup will be called (if non-NULL) after reading raw report from
1031  * device before passing it to hid layer for real parsing.
1032  */
1033 static inline int __must_check hid_parse(struct hid_device *hdev)
1034 {
1035         return hid_open_report(hdev);
1036 }
1037
1038 int __must_check hid_hw_start(struct hid_device *hdev,
1039                               unsigned int connect_mask);
1040 void hid_hw_stop(struct hid_device *hdev);
1041 int __must_check hid_hw_open(struct hid_device *hdev);
1042 void hid_hw_close(struct hid_device *hdev);
1043
1044 /**
1045  * hid_hw_power - requests underlying HW to go into given power mode
1046  *
1047  * @hdev: hid device
1048  * @level: requested power level (one of %PM_HINT_* defines)
1049  *
1050  * This function requests underlying hardware to enter requested power
1051  * mode.
1052  */
1053
1054 static inline int hid_hw_power(struct hid_device *hdev, int level)
1055 {
1056         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
1057 }
1058
1059
1060 /**
1061  * hid_hw_request - send report request to device
1062  *
1063  * @hdev: hid device
1064  * @report: report to send
1065  * @reqtype: hid request type
1066  */
1067 static inline void hid_hw_request(struct hid_device *hdev,
1068                                   struct hid_report *report, int reqtype)
1069 {
1070         if (hdev->ll_driver->request)
1071                 return hdev->ll_driver->request(hdev, report, reqtype);
1072
1073         __hid_request(hdev, report, reqtype);
1074 }
1075
1076 /**
1077  * hid_hw_raw_request - send report request to device
1078  *
1079  * @hdev: hid device
1080  * @reportnum: report ID
1081  * @buf: in/out data to transfer
1082  * @len: length of buf
1083  * @rtype: HID report type
1084  * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
1085  *
1086  * @return: count of data transfered, negative if error
1087  *
1088  * Same behavior as hid_hw_request, but with raw buffers instead.
1089  */
1090 static inline int hid_hw_raw_request(struct hid_device *hdev,
1091                                   unsigned char reportnum, __u8 *buf,
1092                                   size_t len, unsigned char rtype, int reqtype)
1093 {
1094         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1095                 return -EINVAL;
1096
1097         return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1098                                                     rtype, reqtype);
1099 }
1100
1101 /**
1102  * hid_hw_output_report - send output report to device
1103  *
1104  * @hdev: hid device
1105  * @buf: raw data to transfer
1106  * @len: length of buf
1107  *
1108  * @return: count of data transfered, negative if error
1109  */
1110 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1111                                         size_t len)
1112 {
1113         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1114                 return -EINVAL;
1115
1116         if (hdev->ll_driver->output_report)
1117                 return hdev->ll_driver->output_report(hdev, buf, len);
1118
1119         return -ENOSYS;
1120 }
1121
1122 /**
1123  * hid_hw_idle - send idle request to device
1124  *
1125  * @hdev: hid device
1126  * @report: report to control
1127  * @idle: idle state
1128  * @reqtype: hid request type
1129  */
1130 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1131                 int reqtype)
1132 {
1133         if (hdev->ll_driver->idle)
1134                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1135
1136         return 0;
1137 }
1138
1139 /**
1140  * hid_hw_wait - wait for buffered io to complete
1141  *
1142  * @hdev: hid device
1143  */
1144 static inline void hid_hw_wait(struct hid_device *hdev)
1145 {
1146         if (hdev->ll_driver->wait)
1147                 hdev->ll_driver->wait(hdev);
1148 }
1149
1150 /**
1151  * hid_report_len - calculate the report length
1152  *
1153  * @report: the report we want to know the length
1154  */
1155 static inline u32 hid_report_len(struct hid_report *report)
1156 {
1157         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1158         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1159 }
1160
1161 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
1162                 int interrupt);
1163
1164 /* HID quirks API */
1165 unsigned long hid_lookup_quirk(const struct hid_device *hdev);
1166 int hid_quirks_init(char **quirks_param, __u16 bus, int count);
1167 void hid_quirks_exit(__u16 bus);
1168
1169 #ifdef CONFIG_HID_PID
1170 int hid_pidff_init(struct hid_device *hid);
1171 #else
1172 #define hid_pidff_init NULL
1173 #endif
1174
1175 #define dbg_hid(fmt, ...)                                               \
1176 do {                                                                    \
1177         if (hid_debug)                                                  \
1178                 printk(KERN_DEBUG "%s: " fmt, __FILE__, ##__VA_ARGS__); \
1179 } while (0)
1180
1181 #define hid_err(hid, fmt, ...)                          \
1182         dev_err(&(hid)->dev, fmt, ##__VA_ARGS__)
1183 #define hid_notice(hid, fmt, ...)                       \
1184         dev_notice(&(hid)->dev, fmt, ##__VA_ARGS__)
1185 #define hid_warn(hid, fmt, ...)                         \
1186         dev_warn(&(hid)->dev, fmt, ##__VA_ARGS__)
1187 #define hid_info(hid, fmt, ...)                         \
1188         dev_info(&(hid)->dev, fmt, ##__VA_ARGS__)
1189 #define hid_dbg(hid, fmt, ...)                          \
1190         dev_dbg(&(hid)->dev, fmt, ##__VA_ARGS__)
1191
1192 #define hid_err_once(hid, fmt, ...)                     \
1193         dev_err_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1194 #define hid_notice_once(hid, fmt, ...)                  \
1195         dev_notice_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1196 #define hid_warn_once(hid, fmt, ...)                    \
1197         dev_warn_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1198 #define hid_info_once(hid, fmt, ...)                    \
1199         dev_info_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1200 #define hid_dbg_once(hid, fmt, ...)                     \
1201         dev_dbg_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1202
1203 #endif