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/power_supply.h>
  38 #include <uapi/linux/hid.h>
  39
  40 /*
  41  * We parse each description item into this structure. Short items data
  42  * values are expanded to 32-bit signed int, long items contain a pointer
  43  * into the data area.
  44  */
  45
  46 struct hid_item {
  47         unsigned  format;
  48         __u8      size;
  49         __u8      type;
  50         __u8      tag;
  51         union {
  52             __u8   u8;
  53             __s8   s8;
  54             __u16  u16;
  55             __s16  s16;
  56             __u32  u32;
  57             __s32  s32;
  58             __u8  *longdata;
  59         } data;
  60 };
  61
  62 /*
  63  * HID report item format
  64  */
  65
  66 #define HID_ITEM_FORMAT_SHORT   0
  67 #define HID_ITEM_FORMAT_LONG    1
  68
  69 /*
  70  * Special tag indicating long items
  71  */
  72
  73 #define HID_ITEM_TAG_LONG       15
  74
  75 /*
  76  * HID report descriptor item type (prefix bit 2,3)
  77  */
  78
  79 #define HID_ITEM_TYPE_MAIN              0
  80 #define HID_ITEM_TYPE_GLOBAL            1
  81 #define HID_ITEM_TYPE_LOCAL             2
  82 #define HID_ITEM_TYPE_RESERVED          3
  83
  84 /*
  85  * HID report descriptor main item tags
  86  */
  87
  88 #define HID_MAIN_ITEM_TAG_INPUT                 8
  89 #define HID_MAIN_ITEM_TAG_OUTPUT                9
  90 #define HID_MAIN_ITEM_TAG_FEATURE               11
  91 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
  92 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
  93
  94 /*
  95  * HID report descriptor main item contents
  96  */
  97
  98 #define HID_MAIN_ITEM_CONSTANT          0x001
  99 #define HID_MAIN_ITEM_VARIABLE          0x002
 100 #define HID_MAIN_ITEM_RELATIVE          0x004
 101 #define HID_MAIN_ITEM_WRAP              0x008
 102 #define HID_MAIN_ITEM_NONLINEAR         0x010
 103 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 104 #define HID_MAIN_ITEM_NULL_STATE        0x040
 105 #define HID_MAIN_ITEM_VOLATILE          0x080
 106 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 107
 108 /*
 109  * HID report descriptor collection item types
 110  */
 111
 112 #define HID_COLLECTION_PHYSICAL         0
 113 #define HID_COLLECTION_APPLICATION      1
 114 #define HID_COLLECTION_LOGICAL          2
 115
 116 /*
 117  * HID report descriptor global item tags
 118  */
 119
 120 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 121 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 122 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 123 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 124 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 125 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 126 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 127 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 128 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 129 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 130 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 131 #define HID_GLOBAL_ITEM_TAG_POP                 11
 132
 133 /*
 134  * HID report descriptor local item tags
 135  */
 136
 137 #define HID_LOCAL_ITEM_TAG_USAGE                0
 138 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 139 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 140 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 141 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 142 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 143 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 144 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 145 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 146 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 147
 148 /*
 149  * HID usage tables
 150  */
 151
 152 #define HID_USAGE_PAGE          0xffff0000
 153
 154 #define HID_UP_UNDEFINED        0x00000000
 155 #define HID_UP_GENDESK          0x00010000
 156 #define HID_UP_SIMULATION       0x00020000
 157 #define HID_UP_GENDEVCTRLS      0x00060000
 158 #define HID_UP_KEYBOARD         0x00070000
 159 #define HID_UP_LED              0x00080000
 160 #define HID_UP_BUTTON           0x00090000
 161 #define HID_UP_ORDINAL          0x000a0000
 162 #define HID_UP_TELEPHONY        0x000b0000
 163 #define HID_UP_CONSUMER         0x000c0000
 164 #define HID_UP_DIGITIZER        0x000d0000
 165 #define HID_UP_PID              0x000f0000
 166 #define HID_UP_HPVENDOR         0xff7f0000
 167 #define HID_UP_HPVENDOR2        0xff010000
 168 #define HID_UP_MSVENDOR         0xff000000
 169 #define HID_UP_CUSTOM           0x00ff0000
 170 #define HID_UP_LOGIVENDOR       0xffbc0000
 171 #define HID_UP_LNVENDOR         0xffa00000
 172 #define HID_UP_SENSOR           0x00200000
 173
 174 #define HID_USAGE               0x0000ffff
 175
 176 #define HID_GD_POINTER          0x00010001
 177 #define HID_GD_MOUSE            0x00010002
 178 #define HID_GD_JOYSTICK         0x00010004
 179 #define HID_GD_GAMEPAD          0x00010005
 180 #define HID_GD_KEYBOARD         0x00010006
 181 #define HID_GD_KEYPAD           0x00010007
 182 #define HID_GD_MULTIAXIS        0x00010008
 183 #define HID_GD_X                0x00010030
 184 #define HID_GD_Y                0x00010031
 185 #define HID_GD_Z                0x00010032
 186 #define HID_GD_RX               0x00010033
 187 #define HID_GD_RY               0x00010034
 188 #define HID_GD_RZ               0x00010035
 189 #define HID_GD_SLIDER           0x00010036
 190 #define HID_GD_DIAL             0x00010037
 191 #define HID_GD_WHEEL            0x00010038
 192 #define HID_GD_HATSWITCH        0x00010039
 193 #define HID_GD_BUFFER           0x0001003a
 194 #define HID_GD_BYTECOUNT        0x0001003b
 195 #define HID_GD_MOTION           0x0001003c
 196 #define HID_GD_START            0x0001003d
 197 #define HID_GD_SELECT           0x0001003e
 198 #define HID_GD_VX               0x00010040
 199 #define HID_GD_VY               0x00010041
 200 #define HID_GD_VZ               0x00010042
 201 #define HID_GD_VBRX             0x00010043
 202 #define HID_GD_VBRY             0x00010044
 203 #define HID_GD_VBRZ             0x00010045
 204 #define HID_GD_VNO              0x00010046
 205 #define HID_GD_FEATURE          0x00010047
 206 #define HID_GD_SYSTEM_CONTROL   0x00010080
 207 #define HID_GD_UP               0x00010090
 208 #define HID_GD_DOWN             0x00010091
 209 #define HID_GD_RIGHT            0x00010092
 210 #define HID_GD_LEFT             0x00010093
 211
 212 #define HID_DC_BATTERYSTRENGTH  0x00060020
 213
 214 #define HID_CP_CONSUMER_CONTROL 0x000c0001
 215
 216 #define HID_DG_DIGITIZER        0x000d0001
 217 #define HID_DG_PEN              0x000d0002
 218 #define HID_DG_LIGHTPEN         0x000d0003
 219 #define HID_DG_TOUCHSCREEN      0x000d0004
 220 #define HID_DG_TOUCHPAD         0x000d0005
 221 #define HID_DG_STYLUS           0x000d0020
 222 #define HID_DG_PUCK             0x000d0021
 223 #define HID_DG_FINGER           0x000d0022
 224 #define HID_DG_TIPPRESSURE      0x000d0030
 225 #define HID_DG_BARRELPRESSURE   0x000d0031
 226 #define HID_DG_INRANGE          0x000d0032
 227 #define HID_DG_TOUCH            0x000d0033
 228 #define HID_DG_UNTOUCH          0x000d0034
 229 #define HID_DG_TAP              0x000d0035
 230 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 231 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 232 #define HID_DG_INVERT           0x000d003c
 233 #define HID_DG_TIPSWITCH        0x000d0042
 234 #define HID_DG_TIPSWITCH2       0x000d0043
 235 #define HID_DG_BARRELSWITCH     0x000d0044
 236 #define HID_DG_ERASER           0x000d0045
 237 #define HID_DG_TABLETPICK       0x000d0046
 238
 239 #define HID_CP_CONSUMERCONTROL  0x000c0001
 240 #define HID_CP_NUMERICKEYPAD    0x000c0002
 241 #define HID_CP_PROGRAMMABLEBUTTONS      0x000c0003
 242 #define HID_CP_MICROPHONE       0x000c0004
 243 #define HID_CP_HEADPHONE        0x000c0005
 244 #define HID_CP_GRAPHICEQUALIZER 0x000c0006
 245 #define HID_CP_FUNCTIONBUTTONS  0x000c0036
 246 #define HID_CP_SELECTION        0x000c0080
 247 #define HID_CP_MEDIASELECTION   0x000c0087
 248 #define HID_CP_SELECTDISC       0x000c00ba
 249 #define HID_CP_PLAYBACKSPEED    0x000c00f1
 250 #define HID_CP_PROXIMITY        0x000c0109
 251 #define HID_CP_SPEAKERSYSTEM    0x000c0160
 252 #define HID_CP_CHANNELLEFT      0x000c0161
 253 #define HID_CP_CHANNELRIGHT     0x000c0162
 254 #define HID_CP_CHANNELCENTER    0x000c0163
 255 #define HID_CP_CHANNELFRONT     0x000c0164
 256 #define HID_CP_CHANNELCENTERFRONT       0x000c0165
 257 #define HID_CP_CHANNELSIDE      0x000c0166
 258 #define HID_CP_CHANNELSURROUND  0x000c0167
 259 #define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT   0x000c0168
 260 #define HID_CP_CHANNELTOP       0x000c0169
 261 #define HID_CP_CHANNELUNKNOWN   0x000c016a
 262 #define HID_CP_APPLICATIONLAUNCHBUTTONS 0x000c0180
 263 #define HID_CP_GENERICGUIAPPLICATIONCONTROLS    0x000c0200
 264
 265 #define HID_DG_CONFIDENCE       0x000d0047
 266 #define HID_DG_WIDTH            0x000d0048
 267 #define HID_DG_HEIGHT           0x000d0049
 268 #define HID_DG_CONTACTID        0x000d0051
 269 #define HID_DG_INPUTMODE        0x000d0052
 270 #define HID_DG_DEVICEINDEX      0x000d0053
 271 #define HID_DG_CONTACTCOUNT     0x000d0054
 272 #define HID_DG_CONTACTMAX       0x000d0055
 273 #define HID_DG_BUTTONTYPE       0x000d0059
 274 #define HID_DG_BARRELSWITCH2    0x000d005a
 275 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
 276
 277 /*
 278  * HID report types --- Ouch! HID spec says 1 2 3!
 279  */
 280
 281 #define HID_INPUT_REPORT        0
 282 #define HID_OUTPUT_REPORT       1
 283 #define HID_FEATURE_REPORT      2
 284
 285 #define HID_REPORT_TYPES        3
 286
 287 /*
 288  * HID connect requests
 289  */
 290
 291 #define HID_CONNECT_HIDINPUT            0x01
 292 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 293 #define HID_CONNECT_HIDRAW              0x04
 294 #define HID_CONNECT_HIDDEV              0x08
 295 #define HID_CONNECT_HIDDEV_FORCE        0x10
 296 #define HID_CONNECT_FF                  0x20
 297 #define HID_CONNECT_DRIVER              0x40
 298 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 299                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 300
 301 /*
 302  * HID device quirks.
 303  */
 304
 305 /*
 306  * Increase this if you need to configure more HID quirks at module load time
 307  */
 308 #define MAX_USBHID_BOOT_QUIRKS 4
 309
 310 #define HID_QUIRK_INVERT                        0x00000001
 311 #define HID_QUIRK_NOTOUCH                       0x00000002
 312 #define HID_QUIRK_IGNORE                        0x00000004
 313 #define HID_QUIRK_NOGET                         0x00000008
 314 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 315 #define HID_QUIRK_BADPAD                        0x00000020
 316 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 317 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 318 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
 319 #define HID_QUIRK_NO_INIT_INPUT_REPORTS         0x00000200
 320 #define HID_QUIRK_ALWAYS_POLL                   0x00000400
 321 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 322 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         0x00020000
 323 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  0x00040000
 324 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 325 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 326 #define HID_QUIRK_NO_IGNORE                     0x40000000
 327 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 328
 329 /*
 330  * HID device groups
 331  *
 332  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
 333  * and has a value of 0x0000
 334  */
 335 #define HID_GROUP_GENERIC                       0x0001
 336 #define HID_GROUP_MULTITOUCH                    0x0002
 337 #define HID_GROUP_SENSOR_HUB                    0x0003
 338 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
 339
 340 /*
 341  * Vendor specific HID device groups
 342  */
 343 #define HID_GROUP_RMI                           0x0100
 344 #define HID_GROUP_WACOM                         0x0101
 345 #define HID_GROUP_LOGITECH_DJ_DEVICE            0x0102
 346 #define HID_GROUP_STEAM                         0x0103
 347
 348 /*
 349  * HID protocol status
 350  */
 351 #define HID_REPORT_PROTOCOL     1
 352 #define HID_BOOT_PROTOCOL       0
 353
 354 /*
 355  * This is the global environment of the parser. This information is
 356  * persistent for main-items. The global environment can be saved and
 357  * restored with PUSH/POP statements.
 358  */
 359
 360 struct hid_global {
 361         unsigned usage_page;
 362         __s32    logical_minimum;
 363         __s32    logical_maximum;
 364         __s32    physical_minimum;
 365         __s32    physical_maximum;
 366         __s32    unit_exponent;
 367         unsigned unit;
 368         unsigned report_id;
 369         unsigned report_size;
 370         unsigned report_count;
 371 };
 372
 373 /*
 374  * This is the local environment. It is persistent up the next main-item.
 375  */
 376
 377 #define HID_MAX_USAGES                  12288
 378 #define HID_DEFAULT_NUM_COLLECTIONS     16
 379
 380 struct hid_local {
 381         unsigned usage[HID_MAX_USAGES]; /* usage array */
 382         u8 usage_size[HID_MAX_USAGES]; /* usage size array */
 383         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 384         unsigned usage_index;
 385         unsigned usage_minimum;
 386         unsigned delimiter_depth;
 387         unsigned delimiter_branch;
 388         unsigned int usage_page_preceding;
 389 };
 390
 391 /*
 392  * This is the collection stack. We climb up the stack to determine
 393  * application and function of each field.
 394  */
 395
 396 struct hid_collection {
 397         unsigned type;
 398         unsigned usage;
 399         unsigned level;
 400 };
 401
 402 struct hid_usage {
 403         unsigned  hid;                  /* hid usage code */
 404         unsigned  collection_index;     /* index into collection array */
 405         unsigned  usage_index;          /* index into usage array */
 406         /* hidinput data */
 407         __u16     code;                 /* input driver code */
 408         __u8      type;                 /* input driver type */
 409         __s8      hat_min;              /* hat switch fun */
 410         __s8      hat_max;              /* ditto */
 411         __s8      hat_dir;              /* ditto */
 412 };
 413
 414 struct hid_input;
 415
 416 struct hid_field {
 417         unsigned  physical;             /* physical usage for this field */
 418         unsigned  logical;              /* logical usage for this field */
 419         unsigned  application;          /* application usage for this field */
 420         struct hid_usage *usage;        /* usage table for this function */
 421         unsigned  maxusage;             /* maximum usage index */
 422         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 423         unsigned  report_offset;        /* bit offset in the report */
 424         unsigned  report_size;          /* size of this field in the report */
 425         unsigned  report_count;         /* number of this field in the report */
 426         unsigned  report_type;          /* (input,output,feature) */
 427         __s32    *value;                /* last known value(s) */
 428         __s32     logical_minimum;
 429         __s32     logical_maximum;
 430         __s32     physical_minimum;
 431         __s32     physical_maximum;
 432         __s32     unit_exponent;
 433         unsigned  unit;
 434         struct hid_report *report;      /* associated report */
 435         unsigned index;                 /* index into report->field[] */
 436         /* hidinput data */
 437         struct hid_input *hidinput;     /* associated input structure */
 438         __u16 dpad;                     /* dpad input code */
 439 };
 440
 441 #define HID_MAX_FIELDS 256
 442
 443 struct hid_report {
 444         struct list_head list;
 445         unsigned id;                                    /* id of this report */
 446         unsigned type;                                  /* report type */
 447         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 448         unsigned maxfield;                              /* maximum valid field index */
 449         unsigned size;                                  /* size of the report (bits) */
 450         struct hid_device *device;                      /* associated device */
 451 };
 452
 453 #define HID_MAX_IDS 256
 454
 455 struct hid_report_enum {
 456         unsigned numbered;
 457         struct list_head report_list;
 458         struct hid_report *report_id_hash[HID_MAX_IDS];
 459 };
 460
 461 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 462 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 463 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 464 #define HID_OUTPUT_FIFO_SIZE    64
 465
 466 struct hid_control_fifo {
 467         unsigned char dir;
 468         struct hid_report *report;
 469         char *raw_report;
 470 };
 471
 472 struct hid_output_fifo {
 473         struct hid_report *report;
 474         char *raw_report;
 475 };
 476
 477 #define HID_CLAIMED_INPUT       1
 478 #define HID_CLAIMED_HIDDEV      2
 479 #define HID_CLAIMED_HIDRAW      4
 480 #define HID_CLAIMED_DRIVER      8
 481
 482 #define HID_STAT_ADDED          1
 483 #define HID_STAT_PARSED         2
 484
 485 struct hid_input {
 486         struct list_head list;
 487         struct hid_report *report;
 488         struct input_dev *input;
 489 };
 490
 491 enum hid_type {
 492         HID_TYPE_OTHER = 0,
 493         HID_TYPE_USBMOUSE,
 494         HID_TYPE_USBNONE
 495 };
 496
 497 struct hid_driver;
 498 struct hid_ll_driver;
 499
 500 struct hid_device {                                                     /* device report descriptor */
 501         __u8 *dev_rdesc;
 502         unsigned dev_rsize;
 503         __u8 *rdesc;
 504         unsigned rsize;
 505         struct hid_collection *collection;                              /* List of HID collections */
 506         unsigned collection_size;                                       /* Number of allocated hid_collections */
 507         unsigned maxcollection;                                         /* Number of parsed collections */
 508         unsigned maxapplication;                                        /* Number of applications */
 509         __u16 bus;                                                      /* BUS ID */
 510         __u16 group;                                                    /* Report group */
 511         __u32 vendor;                                                   /* Vendor ID */
 512         __u32 product;                                                  /* Product ID */
 513         __u32 version;                                                  /* HID version */
 514         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 515         unsigned country;                                               /* HID country */
 516         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 517         struct work_struct led_work;                                    /* delayed LED worker */
 518
 519         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
 520         struct semaphore driver_input_lock;                             /* protects the current driver */
 521         struct device dev;                                              /* device */
 522         struct hid_driver *driver;
 523         struct hid_ll_driver *ll_driver;
 524
 525 #ifdef CONFIG_HID_BATTERY_STRENGTH
 526         /*
 527          * Power supply information for HID devices which report
 528          * battery strength. power_supply was successfully registered if
 529          * battery is non-NULL.
 530          */
 531         struct power_supply *battery;
 532         __s32 battery_min;
 533         __s32 battery_max;
 534         __s32 battery_report_type;
 535         __s32 battery_report_id;
 536 #endif
 537
 538         unsigned int status;                                            /* see STAT flags above */
 539         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 540         unsigned quirks;                                                /* Various quirks the device can pull on us */
 541         bool io_started;                                                /* Protected by driver_lock. If IO has started */
 542
 543         struct list_head inputs;                                        /* The list of inputs */
 544         void *hiddev;                                                   /* The hiddev structure */
 545         void *hidraw;
 546         int minor;                                                      /* Hiddev minor number */
 547
 548         int open;                                                       /* is the device open by anyone? */
 549         char name[128];                                                 /* Device name */
 550         char phys[64];                                                  /* Device physical location */
 551         char uniq[64];                                                  /* Device unique identifier (serial #) */
 552
 553         void *driver_data;
 554
 555         /* temporary hid_ff handling (until moved to the drivers) */
 556         int (*ff_init)(struct hid_device *);
 557
 558         /* hiddev event handler */
 559         int (*hiddev_connect)(struct hid_device *, unsigned int);
 560         void (*hiddev_disconnect)(struct hid_device *);
 561         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 562                                   struct hid_usage *, __s32);
 563         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 564
 565         /* debugging support via debugfs */
 566         unsigned short debug;
 567         struct dentry *debug_dir;
 568         struct dentry *debug_rdesc;
 569         struct dentry *debug_events;
 570         struct list_head debug_list;
 571         spinlock_t  debug_list_lock;
 572         wait_queue_head_t debug_wait;
 573 };
 574
 575 static inline void *hid_get_drvdata(struct hid_device *hdev)
 576 {
 577         return dev_get_drvdata(&hdev->dev);
 578 }
 579
 580 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 581 {
 582         dev_set_drvdata(&hdev->dev, data);
 583 }
 584
 585 #define HID_GLOBAL_STACK_SIZE 4
 586 #define HID_COLLECTION_STACK_SIZE 4
 587
 588 #define HID_SCAN_FLAG_MT_WIN_8                  BIT(0)
 589 #define HID_SCAN_FLAG_VENDOR_SPECIFIC           BIT(1)
 590 #define HID_SCAN_FLAG_GD_POINTER                BIT(2)
 591
 592 struct hid_parser {
 593         struct hid_global     global;
 594         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 595         unsigned              global_stack_ptr;
 596         struct hid_local      local;
 597         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 598         unsigned              collection_stack_ptr;
 599         struct hid_device    *device;
 600         unsigned              scan_flags;
 601 };
 602
 603 struct hid_class_descriptor {
 604         __u8  bDescriptorType;
 605         __le16 wDescriptorLength;
 606 } __attribute__ ((packed));
 607
 608 struct hid_descriptor {
 609         __u8  bLength;
 610         __u8  bDescriptorType;
 611         __le16 bcdHID;
 612         __u8  bCountryCode;
 613         __u8  bNumDescriptors;
 614
 615         struct hid_class_descriptor desc[1];
 616 } __attribute__ ((packed));
 617
 618 #define HID_DEVICE(b, g, ven, prod)                                     \
 619         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 620 #define HID_USB_DEVICE(ven, prod)                               \
 621         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 622 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 623         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 624 #define HID_I2C_DEVICE(ven, prod)                               \
 625         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
 626
 627 #define HID_REPORT_ID(rep) \
 628         .report_type = (rep)
 629 #define HID_USAGE_ID(uhid, utype, ucode) \
 630         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 631 /* we don't want to catch types and codes equal to 0 */
 632 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 633
 634 struct hid_report_id {
 635         __u32 report_type;
 636 };
 637 struct hid_usage_id {
 638         __u32 usage_hid;
 639         __u32 usage_type;
 640         __u32 usage_code;
 641 };
 642
 643 /**
 644  * struct hid_driver
 645  * @name: driver name (e.g. "Footech_bar-wheel")
 646  * @id_table: which devices is this driver for (must be non-NULL for probe
 647  *            to be called)
 648  * @dyn_list: list of dynamically added device ids
 649  * @dyn_lock: lock protecting @dyn_list
 650  * @probe: new device inserted
 651  * @remove: device removed (NULL if not a hot-plug capable driver)
 652  * @report_table: on which reports to call raw_event (NULL means all)
 653  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 654  * @usage_table: on which events to call event (NULL means all)
 655  * @event: if usage in usage_table, this hook is called (NULL means nop)
 656  * @report: this hook is called after parsing a report (NULL means nop)
 657  * @report_fixup: called before report descriptor parsing (NULL means nop)
 658  * @input_mapping: invoked on input registering before mapping an usage
 659  * @input_mapped: invoked on input registering after mapping an usage
 660  * @input_configured: invoked just before the device is registered
 661  * @feature_mapping: invoked on feature registering
 662  * @suspend: invoked on suspend (NULL means nop)
 663  * @resume: invoked on resume if device was not reset (NULL means nop)
 664  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 665  *
 666  * probe should return -errno on error, or 0 on success. During probe,
 667  * input will not be passed to raw_event unless hid_device_io_start is
 668  * called.
 669  *
 670  * raw_event and event should return 0 on no action performed, 1 when no
 671  * further processing should be done and negative on error
 672  *
 673  * input_mapping shall return a negative value to completely ignore this usage
 674  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 675  * usage by generic code (no special handling needed) or positive to skip
 676  * generic parsing (needed special handling which was done in the hook already)
 677  * input_mapped shall return negative to inform the layer that this usage
 678  * should not be considered for further processing or zero to notify that
 679  * no processing was performed and should be done in a generic manner
 680  * Both these functions may be NULL which means the same behavior as returning
 681  * zero from them.
 682  */
 683 struct hid_driver {
 684         char *name;
 685         const struct hid_device_id *id_table;
 686
 687         struct list_head dyn_list;
 688         spinlock_t dyn_lock;
 689
 690         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 691         void (*remove)(struct hid_device *dev);
 692
 693         const struct hid_report_id *report_table;
 694         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 695                         u8 *data, int size);
 696         const struct hid_usage_id *usage_table;
 697         int (*event)(struct hid_device *hdev, struct hid_field *field,
 698                         struct hid_usage *usage, __s32 value);
 699         void (*report)(struct hid_device *hdev, struct hid_report *report);
 700
 701         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 702                         unsigned int *size);
 703
 704         int (*input_mapping)(struct hid_device *hdev,
 705                         struct hid_input *hidinput, struct hid_field *field,
 706                         struct hid_usage *usage, unsigned long **bit, int *max);
 707         int (*input_mapped)(struct hid_device *hdev,
 708                         struct hid_input *hidinput, struct hid_field *field,
 709                         struct hid_usage *usage, unsigned long **bit, int *max);
 710         int (*input_configured)(struct hid_device *hdev,
 711                                 struct hid_input *hidinput);
 712         void (*feature_mapping)(struct hid_device *hdev,
 713                         struct hid_field *field,
 714                         struct hid_usage *usage);
 715 #ifdef CONFIG_PM
 716         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 717         int (*resume)(struct hid_device *hdev);
 718         int (*reset_resume)(struct hid_device *hdev);
 719 #endif
 720 /* private: */
 721         struct device_driver driver;
 722 };
 723
 724 /**
 725  * hid_ll_driver - low level driver callbacks
 726  * @start: called on probe to start the device
 727  * @stop: called on remove
 728  * @open: called by input layer on open
 729  * @close: called by input layer on close
 730  * @parse: this method is called only once to parse the device data,
 731  *         shouldn't allocate anything to not leak memory
 732  * @request: send report request to device (e.g. feature report)
 733  * @wait: wait for buffered io to complete (send/recv reports)
 734  * @raw_request: send raw report request to device (e.g. feature report)
 735  * @output_report: send output report to device
 736  * @idle: send idle request to device
 737  */
 738 struct hid_ll_driver {
 739         int (*start)(struct hid_device *hdev);
 740         void (*stop)(struct hid_device *hdev);
 741
 742         int (*open)(struct hid_device *hdev);
 743         void (*close)(struct hid_device *hdev);
 744
 745         int (*power)(struct hid_device *hdev, int level);
 746
 747         int (*parse)(struct hid_device *hdev);
 748
 749         void (*request)(struct hid_device *hdev,
 750                         struct hid_report *report, int reqtype);
 751
 752         int (*wait)(struct hid_device *hdev);
 753
 754         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
 755                             __u8 *buf, size_t len, unsigned char rtype,
 756                             int reqtype);
 757
 758         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 759
 760         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 761 };
 762
 763 #define PM_HINT_FULLON  1<<5
 764 #define PM_HINT_NORMAL  1<<1
 765
 766 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 767 /* We ignore a few input applications that are not widely used */
 768 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 769
 770 /* HID core API */
 771
 772 extern int hid_debug;
 773
 774 extern bool hid_ignore(struct hid_device *);
 775 extern int hid_add_device(struct hid_device *);
 776 extern void hid_destroy_device(struct hid_device *);
 777
 778 extern int __must_check __hid_register_driver(struct hid_driver *,
 779                 struct module *, const char *mod_name);
 780
 781 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 782 #define hid_register_driver(driver) \
 783         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 784
 785 extern void hid_unregister_driver(struct hid_driver *);
 786
 787 /**
 788  * module_hid_driver() - Helper macro for registering a HID driver
 789  * @__hid_driver: hid_driver struct
 790  *
 791  * Helper macro for HID drivers which do not do anything special in module
 792  * init/exit. This eliminates a lot of boilerplate. Each module may only
 793  * use this macro once, and calling it replaces module_init() and module_exit()
 794  */
 795 #define module_hid_driver(__hid_driver) \
 796         module_driver(__hid_driver, hid_register_driver, \
 797                       hid_unregister_driver)
 798
 799 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 800 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 801 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 802 extern void hidinput_disconnect(struct hid_device *);
 803
 804 int hid_set_field(struct hid_field *, unsigned, __s32);
 805 int hid_input_report(struct hid_device *, int type, u8 *, u32, int);
 806 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 807 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 808 unsigned int hidinput_count_leds(struct hid_device *hid);
 809 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 810 void hid_output_report(struct hid_report *report, __u8 *data);
 811 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
 812 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 813 struct hid_device *hid_allocate_device(void);
 814 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 815 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 816 struct hid_report *hid_validate_values(struct hid_device *hid,
 817                                        unsigned int type, unsigned int id,
 818                                        unsigned int field_index,
 819                                        unsigned int report_counts);
 820 int hid_open_report(struct hid_device *device);
 821 int hid_check_keys_pressed(struct hid_device *hid);
 822 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 823 void hid_disconnect(struct hid_device *hid);
 824 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 825                                          const struct hid_device_id *id);
 826 s32 hid_snto32(__u32 value, unsigned n);
 827 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
 828                      unsigned offset, unsigned n);
 829
 830 /**
 831  * hid_device_io_start - enable HID input during probe, remove
 832  *
 833  * @hid - the device
 834  *
 835  * This should only be called during probe or remove and only be
 836  * called by the thread calling probe or remove. It will allow
 837  * incoming packets to be delivered to the driver.
 838  */
 839 static inline void hid_device_io_start(struct hid_device *hid) {
 840         if (hid->io_started) {
 841                 dev_warn(&hid->dev, "io already started");
 842                 return;
 843         }
 844         hid->io_started = true;
 845         up(&hid->driver_input_lock);
 846 }
 847
 848 /**
 849  * hid_device_io_stop - disable HID input during probe, remove
 850  *
 851  * @hid - the device
 852  *
 853  * Should only be called after hid_device_io_start. It will prevent
 854  * incoming packets from going to the driver for the duration of
 855  * probe, remove. If called during probe, packets will still go to the
 856  * driver after probe is complete. This function should only be called
 857  * by the thread calling probe or remove.
 858  */
 859 static inline void hid_device_io_stop(struct hid_device *hid) {
 860         if (!hid->io_started) {
 861                 dev_warn(&hid->dev, "io already stopped");
 862                 return;
 863         }
 864         hid->io_started = false;
 865         down(&hid->driver_input_lock);
 866 }
 867
 868 /**
 869  * hid_map_usage - map usage input bits
 870  *
 871  * @hidinput: hidinput which we are interested in
 872  * @usage: usage to fill in
 873  * @bit: pointer to input->{}bit (out parameter)
 874  * @max: maximal valid usage->code to consider later (out parameter)
 875  * @type: input event type (EV_KEY, EV_REL, ...)
 876  * @c: code which corresponds to this usage and type
 877  */
 878 static inline void hid_map_usage(struct hid_input *hidinput,
 879                 struct hid_usage *usage, unsigned long **bit, int *max,
 880                 __u8 type, __u16 c)
 881 {
 882         struct input_dev *input = hidinput->input;
 883
 884         usage->type = type;
 885         usage->code = c;
 886
 887         switch (type) {
 888         case EV_ABS:
 889                 *bit = input->absbit;
 890                 *max = ABS_MAX;
 891                 break;
 892         case EV_REL:
 893                 *bit = input->relbit;
 894                 *max = REL_MAX;
 895                 break;
 896         case EV_KEY:
 897                 *bit = input->keybit;
 898                 *max = KEY_MAX;
 899                 break;
 900         case EV_LED:
 901                 *bit = input->ledbit;
 902                 *max = LED_MAX;
 903                 break;
 904         }
 905 }
 906
 907 /**
 908  * hid_map_usage_clear - map usage input bits and clear the input bit
 909  *
 910  * The same as hid_map_usage, except the @c bit is also cleared in supported
 911  * bits (@bit).
 912  */
 913 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 914                 struct hid_usage *usage, unsigned long **bit, int *max,
 915                 __u8 type, __u16 c)
 916 {
 917         hid_map_usage(hidinput, usage, bit, max, type, c);
 918         clear_bit(c, *bit);
 919 }
 920
 921 /**
 922  * hid_parse - parse HW reports
 923  *
 924  * @hdev: hid device
 925  *
 926  * Call this from probe after you set up the device (if needed). Your
 927  * report_fixup will be called (if non-NULL) after reading raw report from
 928  * device before passing it to hid layer for real parsing.
 929  */
 930 static inline int __must_check hid_parse(struct hid_device *hdev)
 931 {
 932         return hid_open_report(hdev);
 933 }
 934
 935 /**
 936  * hid_hw_start - start underlaying HW
 937  *
 938  * @hdev: hid device
 939  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 940  *
 941  * Call this in probe function *after* hid_parse. This will setup HW buffers
 942  * and start the device (if not deffered to device open). hid_hw_stop must be
 943  * called if this was successful.
 944  */
 945 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 946                 unsigned int connect_mask)
 947 {
 948         int ret = hdev->ll_driver->start(hdev);
 949         if (ret || !connect_mask)
 950                 return ret;
 951         ret = hid_connect(hdev, connect_mask);
 952         if (ret)
 953                 hdev->ll_driver->stop(hdev);
 954         return ret;
 955 }
 956
 957 /**
 958  * hid_hw_stop - stop underlaying HW
 959  *
 960  * @hdev: hid device
 961  *
 962  * This is usually called from remove function or from probe when something
 963  * failed and hid_hw_start was called already.
 964  */
 965 static inline void hid_hw_stop(struct hid_device *hdev)
 966 {
 967         hid_disconnect(hdev);
 968         hdev->ll_driver->stop(hdev);
 969 }
 970
 971 /**
 972  * hid_hw_open - signal underlaying HW to start delivering events
 973  *
 974  * @hdev: hid device
 975  *
 976  * Tell underlying HW to start delivering events from the device.
 977  * This function should be called sometime after successful call
 978  * to hid_hiw_start().
 979  */
 980 static inline int __must_check hid_hw_open(struct hid_device *hdev)
 981 {
 982         return hdev->ll_driver->open(hdev);
 983 }
 984
 985 /**
 986  * hid_hw_close - signal underlaying HW to stop delivering events
 987  *
 988  * @hdev: hid device
 989  *
 990  * This function indicates that we are not interested in the events
 991  * from this device anymore. Delivery of events may or may not stop,
 992  * depending on the number of users still outstanding.
 993  */
 994 static inline void hid_hw_close(struct hid_device *hdev)
 995 {
 996         hdev->ll_driver->close(hdev);
 997 }
 998
 999 /**
1000  * hid_hw_power - requests underlying HW to go into given power mode
1001  *
1002  * @hdev: hid device
1003  * @level: requested power level (one of %PM_HINT_* defines)
1004  *
1005  * This function requests underlying hardware to enter requested power
1006  * mode.
1007  */
1008
1009 static inline int hid_hw_power(struct hid_device *hdev, int level)
1010 {
1011         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
1012 }
1013
1014
1015 /**
1016  * hid_hw_request - send report request to device
1017  *
1018  * @hdev: hid device
1019  * @report: report to send
1020  * @reqtype: hid request type
1021  */
1022 static inline void hid_hw_request(struct hid_device *hdev,
1023                                   struct hid_report *report, int reqtype)
1024 {
1025         if (hdev->ll_driver->request)
1026                 return hdev->ll_driver->request(hdev, report, reqtype);
1027
1028         __hid_request(hdev, report, reqtype);
1029 }
1030
1031 /**
1032  * hid_hw_raw_request - send report request to device
1033  *
1034  * @hdev: hid device
1035  * @reportnum: report ID
1036  * @buf: in/out data to transfer
1037  * @len: length of buf
1038  * @rtype: HID report type
1039  * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
1040  *
1041  * @return: count of data transfered, negative if error
1042  *
1043  * Same behavior as hid_hw_request, but with raw buffers instead.
1044  */
1045 static inline int hid_hw_raw_request(struct hid_device *hdev,
1046                                   unsigned char reportnum, __u8 *buf,
1047                                   size_t len, unsigned char rtype, int reqtype)
1048 {
1049         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1050                 return -EINVAL;
1051
1052         return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1053                                                     rtype, reqtype);
1054 }
1055
1056 /**
1057  * hid_hw_output_report - send output report to device
1058  *
1059  * @hdev: hid device
1060  * @buf: raw data to transfer
1061  * @len: length of buf
1062  *
1063  * @return: count of data transfered, negative if error
1064  */
1065 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1066                                         size_t len)
1067 {
1068         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1069                 return -EINVAL;
1070
1071         if (hdev->ll_driver->output_report)
1072                 return hdev->ll_driver->output_report(hdev, buf, len);
1073
1074         return -ENOSYS;
1075 }
1076
1077 /**
1078  * hid_hw_idle - send idle request to device
1079  *
1080  * @hdev: hid device
1081  * @report: report to control
1082  * @idle: idle state
1083  * @reqtype: hid request type
1084  */
1085 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1086                 int reqtype)
1087 {
1088         if (hdev->ll_driver->idle)
1089                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1090
1091         return 0;
1092 }
1093
1094 /**
1095  * hid_hw_wait - wait for buffered io to complete
1096  *
1097  * @hdev: hid device
1098  */
1099 static inline void hid_hw_wait(struct hid_device *hdev)
1100 {
1101         if (hdev->ll_driver->wait)
1102                 hdev->ll_driver->wait(hdev);
1103 }
1104
1105 /**
1106  * hid_report_len - calculate the report length
1107  *
1108  * @report: the report we want to know the length
1109  */
1110 static inline u32 hid_report_len(struct hid_report *report)
1111 {
1112         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1113         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1114 }
1115
1116 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
1117                 int interrupt);
1118
1119 /* HID quirks API */
1120 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
1121 int usbhid_quirks_init(char **quirks_param);
1122 void usbhid_quirks_exit(void);
1123
1124 #ifdef CONFIG_HID_PID
1125 int hid_pidff_init(struct hid_device *hid);
1126 #else
1127 #define hid_pidff_init NULL
1128 #endif
1129
1130 #define dbg_hid(format, arg...)                                         \
1131 do {                                                                    \
1132         if (hid_debug)                                                  \
1133                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1134 } while (0)
1135
1136 #define hid_printk(level, hid, fmt, arg...)             \
1137         dev_printk(level, &(hid)->dev, fmt, ##arg)
1138 #define hid_emerg(hid, fmt, arg...)                     \
1139         dev_emerg(&(hid)->dev, fmt, ##arg)
1140 #define hid_crit(hid, fmt, arg...)                      \
1141         dev_crit(&(hid)->dev, fmt, ##arg)
1142 #define hid_alert(hid, fmt, arg...)                     \
1143         dev_alert(&(hid)->dev, fmt, ##arg)
1144 #define hid_err(hid, fmt, arg...)                       \
1145         dev_err(&(hid)->dev, fmt, ##arg)
1146 #define hid_notice(hid, fmt, arg...)                    \
1147         dev_notice(&(hid)->dev, fmt, ##arg)
1148 #define hid_warn(hid, fmt, arg...)                      \
1149         dev_warn(&(hid)->dev, fmt, ##arg)
1150 #define hid_info(hid, fmt, arg...)                      \
1151         dev_info(&(hid)->dev, fmt, ##arg)
1152 #define hid_dbg(hid, fmt, arg...)                       \
1153         dev_dbg(&(hid)->dev, fmt, ##arg)
1154
1155 #endif