include/linux/hid.h

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

INCLUDED FROM

DEFINITIONS
