include/linux/hid.h

   1 /*
   2  *  Copyright (c) 1999 Andreas Gal
   3  *  Copyright (c) 2000-2001 Vojtech Pavlik
   4  *  Copyright (c) 2006-2007 Jiri Kosina
   5  */
   6 /*
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  *
  21  * Should you need to contact me, the author, you can do so either by
  22  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  23  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  24  */
  25 #ifndef __HID_H
  26 #define __HID_H
  27
  28
  29 #include <linux/types.h>
  30 #include <linux/slab.h>
  31 #include <linux/list.h>
  32 #include <linux/mod_devicetable.h> /* hid_device_id */
  33 #include <linux/timer.h>
  34 #include <linux/workqueue.h>
  35 #include <linux/input.h>
  36 #include <linux/semaphore.h>
  37 #include <linux/mutex.h>
  38 #include <linux/power_supply.h>
  39 #include <uapi/linux/hid.h>
  40
  41 /*
  42  * We parse each description item into this structure. Short items data
  43  * values are expanded to 32-bit signed int, long items contain a pointer
  44  * into the data area.
  45  */
  46
  47 struct hid_item {
  48         unsigned  format;
  49         __u8      size;
  50         __u8      type;
  51         __u8      tag;
  52         union {
  53             __u8   u8;
  54             __s8   s8;
  55             __u16  u16;
  56             __s16  s16;
  57             __u32  u32;
  58             __s32  s32;
  59             __u8  *longdata;
  60         } data;
  61 };
  62
  63 /*
  64  * HID report item format
  65  */
  66
  67 #define HID_ITEM_FORMAT_SHORT   0
  68 #define HID_ITEM_FORMAT_LONG    1
  69
  70 /*
  71  * Special tag indicating long items
  72  */
  73
  74 #define HID_ITEM_TAG_LONG       15
  75
  76 /*
  77  * HID report descriptor item type (prefix bit 2,3)
  78  */
  79
  80 #define HID_ITEM_TYPE_MAIN              0
  81 #define HID_ITEM_TYPE_GLOBAL            1
  82 #define HID_ITEM_TYPE_LOCAL             2
  83 #define HID_ITEM_TYPE_RESERVED          3
  84
  85 /*
  86  * HID report descriptor main item tags
  87  */
  88
  89 #define HID_MAIN_ITEM_TAG_INPUT                 8
  90 #define HID_MAIN_ITEM_TAG_OUTPUT                9
  91 #define HID_MAIN_ITEM_TAG_FEATURE               11
  92 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
  93 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
  94
  95 /*
  96  * HID report descriptor main item contents
  97  */
  98
  99 #define HID_MAIN_ITEM_CONSTANT          0x001
 100 #define HID_MAIN_ITEM_VARIABLE          0x002
 101 #define HID_MAIN_ITEM_RELATIVE          0x004
 102 #define HID_MAIN_ITEM_WRAP              0x008
 103 #define HID_MAIN_ITEM_NONLINEAR         0x010
 104 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 105 #define HID_MAIN_ITEM_NULL_STATE        0x040
 106 #define HID_MAIN_ITEM_VOLATILE          0x080
 107 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 108
 109 /*
 110  * HID report descriptor collection item types
 111  */
 112
 113 #define HID_COLLECTION_PHYSICAL         0
 114 #define HID_COLLECTION_APPLICATION      1
 115 #define HID_COLLECTION_LOGICAL          2
 116
 117 /*
 118  * HID report descriptor global item tags
 119  */
 120
 121 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 122 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 123 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 124 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 125 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 126 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 127 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 128 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 129 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 130 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 131 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 132 #define HID_GLOBAL_ITEM_TAG_POP                 11
 133
 134 /*
 135  * HID report descriptor local item tags
 136  */
 137
 138 #define HID_LOCAL_ITEM_TAG_USAGE                0
 139 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 140 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 141 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 142 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 143 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 144 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 145 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 146 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 147 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 148
 149 /*
 150  * HID usage tables
 151  */
 152
 153 #define HID_USAGE_PAGE          0xffff0000
 154
 155 #define HID_UP_UNDEFINED        0x00000000
 156 #define HID_UP_GENDESK          0x00010000
 157 #define HID_UP_SIMULATION       0x00020000
 158 #define HID_UP_GENDEVCTRLS      0x00060000
 159 #define HID_UP_KEYBOARD         0x00070000
 160 #define HID_UP_LED              0x00080000
 161 #define HID_UP_BUTTON           0x00090000
 162 #define HID_UP_ORDINAL          0x000a0000
 163 #define HID_UP_TELEPHONY        0x000b0000
 164 #define HID_UP_CONSUMER         0x000c0000
 165 #define HID_UP_DIGITIZER        0x000d0000
 166 #define HID_UP_PID              0x000f0000
 167 #define HID_UP_HPVENDOR         0xff7f0000
 168 #define HID_UP_HPVENDOR2        0xff010000
 169 #define HID_UP_MSVENDOR         0xff000000
 170 #define HID_UP_CUSTOM           0x00ff0000
 171 #define HID_UP_LOGIVENDOR       0xffbc0000
 172 #define HID_UP_LOGIVENDOR2   0xff090000
 173 #define HID_UP_LOGIVENDOR3   0xff430000
 174 #define HID_UP_LNVENDOR         0xffa00000
 175 #define HID_UP_SENSOR           0x00200000
 176
 177 #define HID_USAGE               0x0000ffff
 178
 179 #define HID_GD_POINTER          0x00010001
 180 #define HID_GD_MOUSE            0x00010002
 181 #define HID_GD_JOYSTICK         0x00010004
 182 #define HID_GD_GAMEPAD          0x00010005
 183 #define HID_GD_KEYBOARD         0x00010006
 184 #define HID_GD_KEYPAD           0x00010007
 185 #define HID_GD_MULTIAXIS        0x00010008
 186 /*
 187  * Microsoft Win8 Wireless Radio Controls extensions CA, see:
 188  * http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
 189  */
 190 #define HID_GD_WIRELESS_RADIO_CTLS      0x0001000c
 191 #define HID_GD_X                0x00010030
 192 #define HID_GD_Y                0x00010031
 193 #define HID_GD_Z                0x00010032
 194 #define HID_GD_RX               0x00010033
 195 #define HID_GD_RY               0x00010034
 196 #define HID_GD_RZ               0x00010035
 197 #define HID_GD_SLIDER           0x00010036
 198 #define HID_GD_DIAL             0x00010037
 199 #define HID_GD_WHEEL            0x00010038
 200 #define HID_GD_HATSWITCH        0x00010039
 201 #define HID_GD_BUFFER           0x0001003a
 202 #define HID_GD_BYTECOUNT        0x0001003b
 203 #define HID_GD_MOTION           0x0001003c
 204 #define HID_GD_START            0x0001003d
 205 #define HID_GD_SELECT           0x0001003e
 206 #define HID_GD_VX               0x00010040
 207 #define HID_GD_VY               0x00010041
 208 #define HID_GD_VZ               0x00010042
 209 #define HID_GD_VBRX             0x00010043
 210 #define HID_GD_VBRY             0x00010044
 211 #define HID_GD_VBRZ             0x00010045
 212 #define HID_GD_VNO              0x00010046
 213 #define HID_GD_FEATURE          0x00010047
 214 #define HID_GD_SYSTEM_CONTROL   0x00010080
 215 #define HID_GD_UP               0x00010090
 216 #define HID_GD_DOWN             0x00010091
 217 #define HID_GD_RIGHT            0x00010092
 218 #define HID_GD_LEFT             0x00010093
 219 /* Microsoft Win8 Wireless Radio Controls CA usage codes */
 220 #define HID_GD_RFKILL_BTN       0x000100c6
 221 #define HID_GD_RFKILL_LED       0x000100c7
 222 #define HID_GD_RFKILL_SWITCH    0x000100c8
 223
 224 #define HID_DC_BATTERYSTRENGTH  0x00060020
 225
 226 #define HID_CP_CONSUMER_CONTROL 0x000c0001
 227
 228 #define HID_DG_DIGITIZER        0x000d0001
 229 #define HID_DG_PEN              0x000d0002
 230 #define HID_DG_LIGHTPEN         0x000d0003
 231 #define HID_DG_TOUCHSCREEN      0x000d0004
 232 #define HID_DG_TOUCHPAD         0x000d0005
 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_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_BUTTONTYPE       0x000d0059
 292 #define HID_DG_BARRELSWITCH2    0x000d005a
 293 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
 294
 295 /*
 296  * HID report types --- Ouch! HID spec says 1 2 3!
 297  */
 298
 299 #define HID_INPUT_REPORT        0
 300 #define HID_OUTPUT_REPORT       1
 301 #define HID_FEATURE_REPORT      2
 302
 303 #define HID_REPORT_TYPES        3
 304
 305 /*
 306  * HID connect requests
 307  */
 308
 309 #define HID_CONNECT_HIDINPUT            0x01
 310 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 311 #define HID_CONNECT_HIDRAW              0x04
 312 #define HID_CONNECT_HIDDEV              0x08
 313 #define HID_CONNECT_HIDDEV_FORCE        0x10
 314 #define HID_CONNECT_FF                  0x20
 315 #define HID_CONNECT_DRIVER              0x40
 316 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 317                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 318
 319 /*
 320  * HID device quirks.
 321  */
 322
 323 /*
 324  * Increase this if you need to configure more HID quirks at module load time
 325  */
 326 #define MAX_USBHID_BOOT_QUIRKS 4
 327
 328 #define HID_QUIRK_INVERT                        0x00000001
 329 #define HID_QUIRK_NOTOUCH                       0x00000002
 330 #define HID_QUIRK_IGNORE                        0x00000004
 331 #define HID_QUIRK_NOGET                         0x00000008
 332 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 333 #define HID_QUIRK_BADPAD                        0x00000020
 334 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 335 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 336 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
 337 /* 0x00000200 reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
 338 #define HID_QUIRK_ALWAYS_POLL                   0x00000400
 339 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 340 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         0x00020000
 341 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  0x00040000
 342 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 343 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 344 #define HID_QUIRK_NO_IGNORE                     0x40000000
 345 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 346
 347 /*
 348  * HID device groups
 349  *
 350  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
 351  * and has a value of 0x0000
 352  */
 353 #define HID_GROUP_GENERIC                       0x0001
 354 #define HID_GROUP_MULTITOUCH                    0x0002
 355 #define HID_GROUP_SENSOR_HUB                    0x0003
 356 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
 357
 358 /*
 359  * Vendor specific HID device groups
 360  */
 361 #define HID_GROUP_RMI                           0x0100
 362 #define HID_GROUP_WACOM                         0x0101
 363 #define HID_GROUP_LOGITECH_DJ_DEVICE            0x0102
 364
 365 /*
 366  * This is the global environment of the parser. This information is
 367  * persistent for main-items. The global environment can be saved and
 368  * restored with PUSH/POP statements.
 369  */
 370
 371 struct hid_global {
 372         unsigned usage_page;
 373         __s32    logical_minimum;
 374         __s32    logical_maximum;
 375         __s32    physical_minimum;
 376         __s32    physical_maximum;
 377         __s32    unit_exponent;
 378         unsigned unit;
 379         unsigned report_id;
 380         unsigned report_size;
 381         unsigned report_count;
 382 };
 383
 384 /*
 385  * This is the local environment. It is persistent up the next main-item.
 386  */
 387
 388 #define HID_MAX_USAGES                  12288
 389 #define HID_DEFAULT_NUM_COLLECTIONS     16
 390
 391 struct hid_local {
 392         unsigned usage[HID_MAX_USAGES]; /* usage array */
 393         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 394         unsigned usage_index;
 395         unsigned usage_minimum;
 396         unsigned delimiter_depth;
 397         unsigned delimiter_branch;
 398 };
 399
 400 /*
 401  * This is the collection stack. We climb up the stack to determine
 402  * application and function of each field.
 403  */
 404
 405 struct hid_collection {
 406         unsigned type;
 407         unsigned usage;
 408         unsigned level;
 409 };
 410
 411 struct hid_usage {
 412         unsigned  hid;                  /* hid usage code */
 413         unsigned  collection_index;     /* index into collection array */
 414         unsigned  usage_index;          /* index into usage array */
 415         /* hidinput data */
 416         __u16     code;                 /* input driver code */
 417         __u8      type;                 /* input driver type */
 418         __s8      hat_min;              /* hat switch fun */
 419         __s8      hat_max;              /* ditto */
 420         __s8      hat_dir;              /* ditto */
 421 };
 422
 423 struct hid_input;
 424
 425 struct hid_field {
 426         unsigned  physical;             /* physical usage for this field */
 427         unsigned  logical;              /* logical usage for this field */
 428         unsigned  application;          /* application usage for this field */
 429         struct hid_usage *usage;        /* usage table for this function */
 430         unsigned  maxusage;             /* maximum usage index */
 431         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 432         unsigned  report_offset;        /* bit offset in the report */
 433         unsigned  report_size;          /* size of this field in the report */
 434         unsigned  report_count;         /* number of this field in the report */
 435         unsigned  report_type;          /* (input,output,feature) */
 436         __s32    *value;                /* last known value(s) */
 437         __s32     logical_minimum;
 438         __s32     logical_maximum;
 439         __s32     physical_minimum;
 440         __s32     physical_maximum;
 441         __s32     unit_exponent;
 442         unsigned  unit;
 443         struct hid_report *report;      /* associated report */
 444         unsigned index;                 /* index into report->field[] */
 445         /* hidinput data */
 446         struct hid_input *hidinput;     /* associated input structure */
 447         __u16 dpad;                     /* dpad input code */
 448 };
 449
 450 #define HID_MAX_FIELDS 256
 451
 452 struct hid_report {
 453         struct list_head list;
 454         unsigned id;                                    /* id of this report */
 455         unsigned type;                                  /* report type */
 456         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 457         unsigned maxfield;                              /* maximum valid field index */
 458         unsigned size;                                  /* size of the report (bits) */
 459         struct hid_device *device;                      /* associated device */
 460 };
 461
 462 #define HID_MAX_IDS 256
 463
 464 struct hid_report_enum {
 465         unsigned numbered;
 466         struct list_head report_list;
 467         struct hid_report *report_id_hash[HID_MAX_IDS];
 468 };
 469
 470 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 471 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 472 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 473 #define HID_OUTPUT_FIFO_SIZE    64
 474
 475 struct hid_control_fifo {
 476         unsigned char dir;
 477         struct hid_report *report;
 478         char *raw_report;
 479 };
 480
 481 struct hid_output_fifo {
 482         struct hid_report *report;
 483         char *raw_report;
 484 };
 485
 486 #define HID_CLAIMED_INPUT       1
 487 #define HID_CLAIMED_HIDDEV      2
 488 #define HID_CLAIMED_HIDRAW      4
 489 #define HID_CLAIMED_DRIVER      8
 490
 491 #define HID_STAT_ADDED          1
 492 #define HID_STAT_PARSED         2
 493
 494 struct hid_input {
 495         struct list_head list;
 496         struct hid_report *report;
 497         struct input_dev *input;
 498         bool registered;
 499 };
 500
 501 enum hid_type {
 502         HID_TYPE_OTHER = 0,
 503         HID_TYPE_USBMOUSE,
 504         HID_TYPE_USBNONE
 505 };
 506
 507 struct hid_driver;
 508 struct hid_ll_driver;
 509
 510 struct hid_device {                                                     /* device report descriptor */
 511         __u8 *dev_rdesc;
 512         unsigned dev_rsize;
 513         __u8 *rdesc;
 514         unsigned rsize;
 515         struct hid_collection *collection;                              /* List of HID collections */
 516         unsigned collection_size;                                       /* Number of allocated hid_collections */
 517         unsigned maxcollection;                                         /* Number of parsed collections */
 518         unsigned maxapplication;                                        /* Number of applications */
 519         __u16 bus;                                                      /* BUS ID */
 520         __u16 group;                                                    /* Report group */
 521         __u32 vendor;                                                   /* Vendor ID */
 522         __u32 product;                                                  /* Product ID */
 523         __u32 version;                                                  /* HID version */
 524         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 525         unsigned country;                                               /* HID country */
 526         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 527         struct work_struct led_work;                                    /* delayed LED worker */
 528
 529         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
 530         struct semaphore driver_input_lock;                             /* protects the current driver */
 531         struct device dev;                                              /* device */
 532         struct hid_driver *driver;
 533
 534         struct hid_ll_driver *ll_driver;
 535         struct mutex ll_open_lock;
 536         unsigned int ll_open_count;
 537
 538 #ifdef CONFIG_HID_BATTERY_STRENGTH
 539         /*
 540          * Power supply information for HID devices which report
 541          * battery strength. power_supply was successfully registered if
 542          * battery is non-NULL.
 543          */
 544         struct power_supply *battery;
 545         __s32 battery_min;
 546         __s32 battery_max;
 547         __s32 battery_report_type;
 548         __s32 battery_report_id;
 549 #endif
 550
 551         unsigned int status;                                            /* see STAT flags above */
 552         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 553         unsigned quirks;                                                /* Various quirks the device can pull on us */
 554         bool io_started;                                                /* Protected by driver_lock. If IO has started */
 555
 556         struct list_head inputs;                                        /* The list of inputs */
 557         void *hiddev;                                                   /* The hiddev structure */
 558         void *hidraw;
 559
 560         char name[128];                                                 /* Device name */
 561         char phys[64];                                                  /* Device physical location */
 562         char uniq[64];                                                  /* Device unique identifier (serial #) */
 563
 564         void *driver_data;
 565
 566         /* temporary hid_ff handling (until moved to the drivers) */
 567         int (*ff_init)(struct hid_device *);
 568
 569         /* hiddev event handler */
 570         int (*hiddev_connect)(struct hid_device *, unsigned int);
 571         void (*hiddev_disconnect)(struct hid_device *);
 572         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 573                                   struct hid_usage *, __s32);
 574         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 575
 576         /* debugging support via debugfs */
 577         unsigned short debug;
 578         struct dentry *debug_dir;
 579         struct dentry *debug_rdesc;
 580         struct dentry *debug_events;
 581         struct list_head debug_list;
 582         spinlock_t  debug_list_lock;
 583         wait_queue_head_t debug_wait;
 584 };
 585
 586 #define to_hid_device(pdev) \
 587         container_of(pdev, struct hid_device, dev)
 588
 589 static inline void *hid_get_drvdata(struct hid_device *hdev)
 590 {
 591         return dev_get_drvdata(&hdev->dev);
 592 }
 593
 594 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 595 {
 596         dev_set_drvdata(&hdev->dev, data);
 597 }
 598
 599 #define HID_GLOBAL_STACK_SIZE 4
 600 #define HID_COLLECTION_STACK_SIZE 4
 601
 602 #define HID_SCAN_FLAG_MT_WIN_8                  BIT(0)
 603 #define HID_SCAN_FLAG_VENDOR_SPECIFIC           BIT(1)
 604 #define HID_SCAN_FLAG_GD_POINTER                BIT(2)
 605
 606 struct hid_parser {
 607         struct hid_global     global;
 608         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 609         unsigned              global_stack_ptr;
 610         struct hid_local      local;
 611         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 612         unsigned              collection_stack_ptr;
 613         struct hid_device    *device;
 614         unsigned              scan_flags;
 615 };
 616
 617 struct hid_class_descriptor {
 618         __u8  bDescriptorType;
 619         __le16 wDescriptorLength;
 620 } __attribute__ ((packed));
 621
 622 struct hid_descriptor {
 623         __u8  bLength;
 624         __u8  bDescriptorType;
 625         __le16 bcdHID;
 626         __u8  bCountryCode;
 627         __u8  bNumDescriptors;
 628
 629         struct hid_class_descriptor desc[1];
 630 } __attribute__ ((packed));
 631
 632 #define HID_DEVICE(b, g, ven, prod)                                     \
 633         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 634 #define HID_USB_DEVICE(ven, prod)                               \
 635         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 636 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 637         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 638 #define HID_I2C_DEVICE(ven, prod)                               \
 639         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
 640
 641 #define HID_REPORT_ID(rep) \
 642         .report_type = (rep)
 643 #define HID_USAGE_ID(uhid, utype, ucode) \
 644         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 645 /* we don't want to catch types and codes equal to 0 */
 646 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 647
 648 struct hid_report_id {
 649         __u32 report_type;
 650 };
 651 struct hid_usage_id {
 652         __u32 usage_hid;
 653         __u32 usage_type;
 654         __u32 usage_code;
 655 };
 656
 657 /**
 658  * struct hid_driver
 659  * @name: driver name (e.g. "Footech_bar-wheel")
 660  * @id_table: which devices is this driver for (must be non-NULL for probe
 661  *            to be called)
 662  * @dyn_list: list of dynamically added device ids
 663  * @dyn_lock: lock protecting @dyn_list
 664  * @probe: new device inserted
 665  * @remove: device removed (NULL if not a hot-plug capable driver)
 666  * @report_table: on which reports to call raw_event (NULL means all)
 667  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 668  * @usage_table: on which events to call event (NULL means all)
 669  * @event: if usage in usage_table, this hook is called (NULL means nop)
 670  * @report: this hook is called after parsing a report (NULL means nop)
 671  * @report_fixup: called before report descriptor parsing (NULL means nop)
 672  * @input_mapping: invoked on input registering before mapping an usage
 673  * @input_mapped: invoked on input registering after mapping an usage
 674  * @input_configured: invoked just before the device is registered
 675  * @feature_mapping: invoked on feature registering
 676  * @suspend: invoked on suspend (NULL means nop)
 677  * @resume: invoked on resume if device was not reset (NULL means nop)
 678  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 679  *
 680  * probe should return -errno on error, or 0 on success. During probe,
 681  * input will not be passed to raw_event unless hid_device_io_start is
 682  * called.
 683  *
 684  * raw_event and event should return 0 on no action performed, 1 when no
 685  * further processing should be done and negative on error
 686  *
 687  * input_mapping shall return a negative value to completely ignore this usage
 688  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 689  * usage by generic code (no special handling needed) or positive to skip
 690  * generic parsing (needed special handling which was done in the hook already)
 691  * input_mapped shall return negative to inform the layer that this usage
 692  * should not be considered for further processing or zero to notify that
 693  * no processing was performed and should be done in a generic manner
 694  * Both these functions may be NULL which means the same behavior as returning
 695  * zero from them.
 696  */
 697 struct hid_driver {
 698         char *name;
 699         const struct hid_device_id *id_table;
 700
 701         struct list_head dyn_list;
 702         spinlock_t dyn_lock;
 703
 704         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 705         void (*remove)(struct hid_device *dev);
 706
 707         const struct hid_report_id *report_table;
 708         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 709                         u8 *data, int size);
 710         const struct hid_usage_id *usage_table;
 711         int (*event)(struct hid_device *hdev, struct hid_field *field,
 712                         struct hid_usage *usage, __s32 value);
 713         void (*report)(struct hid_device *hdev, struct hid_report *report);
 714
 715         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 716                         unsigned int *size);
 717
 718         int (*input_mapping)(struct hid_device *hdev,
 719                         struct hid_input *hidinput, struct hid_field *field,
 720                         struct hid_usage *usage, unsigned long **bit, int *max);
 721         int (*input_mapped)(struct hid_device *hdev,
 722                         struct hid_input *hidinput, struct hid_field *field,
 723                         struct hid_usage *usage, unsigned long **bit, int *max);
 724         int (*input_configured)(struct hid_device *hdev,
 725                                 struct hid_input *hidinput);
 726         void (*feature_mapping)(struct hid_device *hdev,
 727                         struct hid_field *field,
 728                         struct hid_usage *usage);
 729 #ifdef CONFIG_PM
 730         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 731         int (*resume)(struct hid_device *hdev);
 732         int (*reset_resume)(struct hid_device *hdev);
 733 #endif
 734 /* private: */
 735         struct device_driver driver;
 736 };
 737
 738 #define to_hid_driver(pdrv) \
 739         container_of(pdrv, struct hid_driver, driver)
 740
 741 /**
 742  * hid_ll_driver - low level driver callbacks
 743  * @start: called on probe to start the device
 744  * @stop: called on remove
 745  * @open: called by input layer on open
 746  * @close: called by input layer on close
 747  * @parse: this method is called only once to parse the device data,
 748  *         shouldn't allocate anything to not leak memory
 749  * @request: send report request to device (e.g. feature report)
 750  * @wait: wait for buffered io to complete (send/recv reports)
 751  * @raw_request: send raw report request to device (e.g. feature report)
 752  * @output_report: send output report to device
 753  * @idle: send idle request to device
 754  */
 755 struct hid_ll_driver {
 756         int (*start)(struct hid_device *hdev);
 757         void (*stop)(struct hid_device *hdev);
 758
 759         int (*open)(struct hid_device *hdev);
 760         void (*close)(struct hid_device *hdev);
 761
 762         int (*power)(struct hid_device *hdev, int level);
 763
 764         int (*parse)(struct hid_device *hdev);
 765
 766         void (*request)(struct hid_device *hdev,
 767                         struct hid_report *report, int reqtype);
 768
 769         int (*wait)(struct hid_device *hdev);
 770
 771         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
 772                             __u8 *buf, size_t len, unsigned char rtype,
 773                             int reqtype);
 774
 775         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 776
 777         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 778 };
 779
 780 extern struct hid_ll_driver i2c_hid_ll_driver;
 781 extern struct hid_ll_driver hidp_hid_driver;
 782 extern struct hid_ll_driver uhid_hid_driver;
 783 extern struct hid_ll_driver usb_hid_driver;
 784
 785 static inline bool hid_is_using_ll_driver(struct hid_device *hdev,
 786                 struct hid_ll_driver *driver)
 787 {
 788         return hdev->ll_driver == driver;
 789 }
 790
 791 #define PM_HINT_FULLON  1<<5
 792 #define PM_HINT_NORMAL  1<<1
 793
 794 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 795 /* We ignore a few input applications that are not widely used */
 796 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 797
 798 /* HID core API */
 799
 800 extern int hid_debug;
 801
 802 extern bool hid_ignore(struct hid_device *);
 803 extern int hid_add_device(struct hid_device *);
 804 extern void hid_destroy_device(struct hid_device *);
 805
 806 extern int __must_check __hid_register_driver(struct hid_driver *,
 807                 struct module *, const char *mod_name);
 808
 809 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 810 #define hid_register_driver(driver) \
 811         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 812
 813 extern void hid_unregister_driver(struct hid_driver *);
 814
 815 /**
 816  * module_hid_driver() - Helper macro for registering a HID driver
 817  * @__hid_driver: hid_driver struct
 818  *
 819  * Helper macro for HID drivers which do not do anything special in module
 820  * init/exit. This eliminates a lot of boilerplate. Each module may only
 821  * use this macro once, and calling it replaces module_init() and module_exit()
 822  */
 823 #define module_hid_driver(__hid_driver) \
 824         module_driver(__hid_driver, hid_register_driver, \
 825                       hid_unregister_driver)
 826
 827 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 828 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 829 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 830 extern void hidinput_disconnect(struct hid_device *);
 831
 832 int hid_set_field(struct hid_field *, unsigned, __s32);
 833 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 834 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 835 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 836 unsigned int hidinput_count_leds(struct hid_device *hid);
 837 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 838 void hid_output_report(struct hid_report *report, __u8 *data);
 839 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
 840 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 841 struct hid_device *hid_allocate_device(void);
 842 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 843 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 844 struct hid_report *hid_validate_values(struct hid_device *hid,
 845                                        unsigned int type, unsigned int id,
 846                                        unsigned int field_index,
 847                                        unsigned int report_counts);
 848 int hid_open_report(struct hid_device *device);
 849 int hid_check_keys_pressed(struct hid_device *hid);
 850 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 851 void hid_disconnect(struct hid_device *hid);
 852 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 853                                          const struct hid_device_id *id);
 854 s32 hid_snto32(__u32 value, unsigned n);
 855 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
 856                      unsigned offset, unsigned n);
 857
 858 /**
 859  * hid_device_io_start - enable HID input during probe, remove
 860  *
 861  * @hid - the device
 862  *
 863  * This should only be called during probe or remove and only be
 864  * called by the thread calling probe or remove. It will allow
 865  * incoming packets to be delivered to the driver.
 866  */
 867 static inline void hid_device_io_start(struct hid_device *hid) {
 868         if (hid->io_started) {
 869                 dev_warn(&hid->dev, "io already started\n");
 870                 return;
 871         }
 872         hid->io_started = true;
 873         up(&hid->driver_input_lock);
 874 }
 875
 876 /**
 877  * hid_device_io_stop - disable HID input during probe, remove
 878  *
 879  * @hid - the device
 880  *
 881  * Should only be called after hid_device_io_start. It will prevent
 882  * incoming packets from going to the driver for the duration of
 883  * probe, remove. If called during probe, packets will still go to the
 884  * driver after probe is complete. This function should only be called
 885  * by the thread calling probe or remove.
 886  */
 887 static inline void hid_device_io_stop(struct hid_device *hid) {
 888         if (!hid->io_started) {
 889                 dev_warn(&hid->dev, "io already stopped\n");
 890                 return;
 891         }
 892         hid->io_started = false;
 893         down(&hid->driver_input_lock);
 894 }
 895
 896 /**
 897  * hid_map_usage - map usage input bits
 898  *
 899  * @hidinput: hidinput which we are interested in
 900  * @usage: usage to fill in
 901  * @bit: pointer to input->{}bit (out parameter)
 902  * @max: maximal valid usage->code to consider later (out parameter)
 903  * @type: input event type (EV_KEY, EV_REL, ...)
 904  * @c: code which corresponds to this usage and type
 905  */
 906 static inline void hid_map_usage(struct hid_input *hidinput,
 907                 struct hid_usage *usage, unsigned long **bit, int *max,
 908                 __u8 type, __u16 c)
 909 {
 910         struct input_dev *input = hidinput->input;
 911
 912         usage->type = type;
 913         usage->code = c;
 914
 915         switch (type) {
 916         case EV_ABS:
 917                 *bit = input->absbit;
 918                 *max = ABS_MAX;
 919                 break;
 920         case EV_REL:
 921                 *bit = input->relbit;
 922                 *max = REL_MAX;
 923                 break;
 924         case EV_KEY:
 925                 *bit = input->keybit;
 926                 *max = KEY_MAX;
 927                 break;
 928         case EV_LED:
 929                 *bit = input->ledbit;
 930                 *max = LED_MAX;
 931                 break;
 932         }
 933 }
 934
 935 /**
 936  * hid_map_usage_clear - map usage input bits and clear the input bit
 937  *
 938  * The same as hid_map_usage, except the @c bit is also cleared in supported
 939  * bits (@bit).
 940  */
 941 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 942                 struct hid_usage *usage, unsigned long **bit, int *max,
 943                 __u8 type, __u16 c)
 944 {
 945         hid_map_usage(hidinput, usage, bit, max, type, c);
 946         clear_bit(c, *bit);
 947 }
 948
 949 /**
 950  * hid_parse - parse HW reports
 951  *
 952  * @hdev: hid device
 953  *
 954  * Call this from probe after you set up the device (if needed). Your
 955  * report_fixup will be called (if non-NULL) after reading raw report from
 956  * device before passing it to hid layer for real parsing.
 957  */
 958 static inline int __must_check hid_parse(struct hid_device *hdev)
 959 {
 960         return hid_open_report(hdev);
 961 }
 962
 963 int __must_check hid_hw_start(struct hid_device *hdev,
 964                               unsigned int connect_mask);
 965 void hid_hw_stop(struct hid_device *hdev);
 966 int __must_check hid_hw_open(struct hid_device *hdev);
 967 void hid_hw_close(struct hid_device *hdev);
 968
 969 /**
 970  * hid_hw_power - requests underlying HW to go into given power mode
 971  *
 972  * @hdev: hid device
 973  * @level: requested power level (one of %PM_HINT_* defines)
 974  *
 975  * This function requests underlying hardware to enter requested power
 976  * mode.
 977  */
 978
 979 static inline int hid_hw_power(struct hid_device *hdev, int level)
 980 {
 981         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 982 }
 983
 984
 985 /**
 986  * hid_hw_request - send report request to device
 987  *
 988  * @hdev: hid device
 989  * @report: report to send
 990  * @reqtype: hid request type
 991  */
 992 static inline void hid_hw_request(struct hid_device *hdev,
 993                                   struct hid_report *report, int reqtype)
 994 {
 995         if (hdev->ll_driver->request)
 996                 return hdev->ll_driver->request(hdev, report, reqtype);
 997
 998         __hid_request(hdev, report, reqtype);
 999 }
1000
1001 /**
1002  * hid_hw_raw_request - send report request to device
1003  *
1004  * @hdev: hid device
1005  * @reportnum: report ID
1006  * @buf: in/out data to transfer
1007  * @len: length of buf
1008  * @rtype: HID report type
1009  * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
1010  *
1011  * @return: count of data transfered, negative if error
1012  *
1013  * Same behavior as hid_hw_request, but with raw buffers instead.
1014  */
1015 static inline int hid_hw_raw_request(struct hid_device *hdev,
1016                                   unsigned char reportnum, __u8 *buf,
1017                                   size_t len, unsigned char rtype, int reqtype)
1018 {
1019         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1020                 return -EINVAL;
1021
1022         return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1023                                                     rtype, reqtype);
1024 }
1025
1026 /**
1027  * hid_hw_output_report - send output report to device
1028  *
1029  * @hdev: hid device
1030  * @buf: raw data to transfer
1031  * @len: length of buf
1032  *
1033  * @return: count of data transfered, negative if error
1034  */
1035 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1036                                         size_t len)
1037 {
1038         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1039                 return -EINVAL;
1040
1041         if (hdev->ll_driver->output_report)
1042                 return hdev->ll_driver->output_report(hdev, buf, len);
1043
1044         return -ENOSYS;
1045 }
1046
1047 /**
1048  * hid_hw_idle - send idle request to device
1049  *
1050  * @hdev: hid device
1051  * @report: report to control
1052  * @idle: idle state
1053  * @reqtype: hid request type
1054  */
1055 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1056                 int reqtype)
1057 {
1058         if (hdev->ll_driver->idle)
1059                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1060
1061         return 0;
1062 }
1063
1064 /**
1065  * hid_hw_wait - wait for buffered io to complete
1066  *
1067  * @hdev: hid device
1068  */
1069 static inline void hid_hw_wait(struct hid_device *hdev)
1070 {
1071         if (hdev->ll_driver->wait)
1072                 hdev->ll_driver->wait(hdev);
1073 }
1074
1075 /**
1076  * hid_report_len - calculate the report length
1077  *
1078  * @report: the report we want to know the length
1079  */
1080 static inline int hid_report_len(struct hid_report *report)
1081 {
1082         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1083         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1084 }
1085
1086 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1087                 int interrupt);
1088
1089 /* HID quirks API */
1090 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
1091 int usbhid_quirks_init(char **quirks_param);
1092 void usbhid_quirks_exit(void);
1093
1094 #ifdef CONFIG_HID_PID
1095 int hid_pidff_init(struct hid_device *hid);
1096 #else
1097 #define hid_pidff_init NULL
1098 #endif
1099
1100 #define dbg_hid(format, arg...)                                         \
1101 do {                                                                    \
1102         if (hid_debug)                                                  \
1103                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1104 } while (0)
1105
1106 #define hid_printk(level, hid, fmt, arg...)             \
1107         dev_printk(level, &(hid)->dev, fmt, ##arg)
1108 #define hid_emerg(hid, fmt, arg...)                     \
1109         dev_emerg(&(hid)->dev, fmt, ##arg)
1110 #define hid_crit(hid, fmt, arg...)                      \
1111         dev_crit(&(hid)->dev, fmt, ##arg)
1112 #define hid_alert(hid, fmt, arg...)                     \
1113         dev_alert(&(hid)->dev, fmt, ##arg)
1114 #define hid_err(hid, fmt, arg...)                       \
1115         dev_err(&(hid)->dev, fmt, ##arg)
1116 #define hid_notice(hid, fmt, arg...)                    \
1117         dev_notice(&(hid)->dev, fmt, ##arg)
1118 #define hid_warn(hid, fmt, arg...)                      \
1119         dev_warn(&(hid)->dev, fmt, ##arg)
1120 #define hid_info(hid, fmt, arg...)                      \
1121         dev_info(&(hid)->dev, fmt, ##arg)
1122 #define hid_dbg(hid, fmt, arg...)                       \
1123         dev_dbg(&(hid)->dev, fmt, ##arg)
1124
1125 #endif