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_CONSUMER         0x000c0000
 163 #define HID_UP_DIGITIZER        0x000d0000
 164 #define HID_UP_PID              0x000f0000
 165 #define HID_UP_HPVENDOR         0xff7f0000
 166 #define HID_UP_HPVENDOR2        0xff010000
 167 #define HID_UP_MSVENDOR         0xff000000
 168 #define HID_UP_CUSTOM           0x00ff0000
 169 #define HID_UP_LOGIVENDOR       0xffbc0000
 170 #define HID_UP_SENSOR           0x00200000
 171
 172 #define HID_USAGE               0x0000ffff
 173
 174 #define HID_GD_POINTER          0x00010001
 175 #define HID_GD_MOUSE            0x00010002
 176 #define HID_GD_JOYSTICK         0x00010004
 177 #define HID_GD_GAMEPAD          0x00010005
 178 #define HID_GD_KEYBOARD         0x00010006
 179 #define HID_GD_KEYPAD           0x00010007
 180 #define HID_GD_MULTIAXIS        0x00010008
 181 #define HID_GD_X                0x00010030
 182 #define HID_GD_Y                0x00010031
 183 #define HID_GD_Z                0x00010032
 184 #define HID_GD_RX               0x00010033
 185 #define HID_GD_RY               0x00010034
 186 #define HID_GD_RZ               0x00010035
 187 #define HID_GD_SLIDER           0x00010036
 188 #define HID_GD_DIAL             0x00010037
 189 #define HID_GD_WHEEL            0x00010038
 190 #define HID_GD_HATSWITCH        0x00010039
 191 #define HID_GD_BUFFER           0x0001003a
 192 #define HID_GD_BYTECOUNT        0x0001003b
 193 #define HID_GD_MOTION           0x0001003c
 194 #define HID_GD_START            0x0001003d
 195 #define HID_GD_SELECT           0x0001003e
 196 #define HID_GD_VX               0x00010040
 197 #define HID_GD_VY               0x00010041
 198 #define HID_GD_VZ               0x00010042
 199 #define HID_GD_VBRX             0x00010043
 200 #define HID_GD_VBRY             0x00010044
 201 #define HID_GD_VBRZ             0x00010045
 202 #define HID_GD_VNO              0x00010046
 203 #define HID_GD_FEATURE          0x00010047
 204 #define HID_GD_SYSTEM_CONTROL   0x00010080
 205 #define HID_GD_UP               0x00010090
 206 #define HID_GD_DOWN             0x00010091
 207 #define HID_GD_RIGHT            0x00010092
 208 #define HID_GD_LEFT             0x00010093
 209
 210 #define HID_DC_BATTERYSTRENGTH  0x00060020
 211
 212 #define HID_CP_CONSUMER_CONTROL 0x000c0001
 213
 214 #define HID_DG_DIGITIZER        0x000d0001
 215 #define HID_DG_PEN              0x000d0002
 216 #define HID_DG_LIGHTPEN         0x000d0003
 217 #define HID_DG_TOUCHSCREEN      0x000d0004
 218 #define HID_DG_TOUCHPAD         0x000d0005
 219 #define HID_DG_STYLUS           0x000d0020
 220 #define HID_DG_PUCK             0x000d0021
 221 #define HID_DG_FINGER           0x000d0022
 222 #define HID_DG_TIPPRESSURE      0x000d0030
 223 #define HID_DG_BARRELPRESSURE   0x000d0031
 224 #define HID_DG_INRANGE          0x000d0032
 225 #define HID_DG_TOUCH            0x000d0033
 226 #define HID_DG_UNTOUCH          0x000d0034
 227 #define HID_DG_TAP              0x000d0035
 228 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 229 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 230 #define HID_DG_INVERT           0x000d003c
 231 #define HID_DG_TIPSWITCH        0x000d0042
 232 #define HID_DG_TIPSWITCH2       0x000d0043
 233 #define HID_DG_BARRELSWITCH     0x000d0044
 234 #define HID_DG_ERASER           0x000d0045
 235 #define HID_DG_TABLETPICK       0x000d0046
 236 /*
 237  * as of May 20, 2009 the usages below are not yet in the official USB spec
 238  * but are being pushed by Microsft as described in their paper "Digitizer
 239  * Drivers for Windows Touch and Pen-Based Computers"
 240  */
 241 #define HID_DG_CONFIDENCE       0x000d0047
 242 #define HID_DG_WIDTH            0x000d0048
 243 #define HID_DG_HEIGHT           0x000d0049
 244 #define HID_DG_CONTACTID        0x000d0051
 245 #define HID_DG_INPUTMODE        0x000d0052
 246 #define HID_DG_DEVICEINDEX      0x000d0053
 247 #define HID_DG_CONTACTCOUNT     0x000d0054
 248 #define HID_DG_CONTACTMAX       0x000d0055
 249
 250 /*
 251  * HID report types --- Ouch! HID spec says 1 2 3!
 252  */
 253
 254 #define HID_INPUT_REPORT        0
 255 #define HID_OUTPUT_REPORT       1
 256 #define HID_FEATURE_REPORT      2
 257
 258 #define HID_REPORT_TYPES        3
 259
 260 /*
 261  * HID connect requests
 262  */
 263
 264 #define HID_CONNECT_HIDINPUT            0x01
 265 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 266 #define HID_CONNECT_HIDRAW              0x04
 267 #define HID_CONNECT_HIDDEV              0x08
 268 #define HID_CONNECT_HIDDEV_FORCE        0x10
 269 #define HID_CONNECT_FF                  0x20
 270 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 271                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 272
 273 /*
 274  * HID device quirks.
 275  */
 276
 277 /*
 278  * Increase this if you need to configure more HID quirks at module load time
 279  */
 280 #define MAX_USBHID_BOOT_QUIRKS 4
 281
 282 #define HID_QUIRK_INVERT                        0x00000001
 283 #define HID_QUIRK_NOTOUCH                       0x00000002
 284 #define HID_QUIRK_IGNORE                        0x00000004
 285 #define HID_QUIRK_NOGET                         0x00000008
 286 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 287 #define HID_QUIRK_BADPAD                        0x00000020
 288 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 289 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 290 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
 291 #define HID_QUIRK_NO_INIT_INPUT_REPORTS         0x00000200
 292 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 293 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         0x00020000
 294 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  0x00040000
 295 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 296 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 297 #define HID_QUIRK_NO_IGNORE                     0x40000000
 298 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 299
 300 /*
 301  * HID device groups
 302  *
 303  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
 304  * and has a value of 0x0000
 305  */
 306 #define HID_GROUP_GENERIC                       0x0001
 307 #define HID_GROUP_MULTITOUCH                    0x0002
 308 #define HID_GROUP_SENSOR_HUB                    0x0003
 309 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
 310
 311 /*
 312  * Vendor specific HID device groups
 313  */
 314 #define HID_GROUP_RMI                           0x0100
 315
 316 /*
 317  * This is the global environment of the parser. This information is
 318  * persistent for main-items. The global environment can be saved and
 319  * restored with PUSH/POP statements.
 320  */
 321
 322 struct hid_global {
 323         unsigned usage_page;
 324         __s32    logical_minimum;
 325         __s32    logical_maximum;
 326         __s32    physical_minimum;
 327         __s32    physical_maximum;
 328         __s32    unit_exponent;
 329         unsigned unit;
 330         unsigned report_id;
 331         unsigned report_size;
 332         unsigned report_count;
 333 };
 334
 335 /*
 336  * This is the local environment. It is persistent up the next main-item.
 337  */
 338
 339 #define HID_MAX_USAGES                  12288
 340 #define HID_DEFAULT_NUM_COLLECTIONS     16
 341
 342 struct hid_local {
 343         unsigned usage[HID_MAX_USAGES]; /* usage array */
 344         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 345         unsigned usage_index;
 346         unsigned usage_minimum;
 347         unsigned delimiter_depth;
 348         unsigned delimiter_branch;
 349 };
 350
 351 /*
 352  * This is the collection stack. We climb up the stack to determine
 353  * application and function of each field.
 354  */
 355
 356 struct hid_collection {
 357         unsigned type;
 358         unsigned usage;
 359         unsigned level;
 360 };
 361
 362 struct hid_usage {
 363         unsigned  hid;                  /* hid usage code */
 364         unsigned  collection_index;     /* index into collection array */
 365         unsigned  usage_index;          /* index into usage array */
 366         /* hidinput data */
 367         __u16     code;                 /* input driver code */
 368         __u8      type;                 /* input driver type */
 369         __s8      hat_min;              /* hat switch fun */
 370         __s8      hat_max;              /* ditto */
 371         __s8      hat_dir;              /* ditto */
 372 };
 373
 374 struct hid_input;
 375
 376 struct hid_field {
 377         unsigned  physical;             /* physical usage for this field */
 378         unsigned  logical;              /* logical usage for this field */
 379         unsigned  application;          /* application usage for this field */
 380         struct hid_usage *usage;        /* usage table for this function */
 381         unsigned  maxusage;             /* maximum usage index */
 382         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 383         unsigned  report_offset;        /* bit offset in the report */
 384         unsigned  report_size;          /* size of this field in the report */
 385         unsigned  report_count;         /* number of this field in the report */
 386         unsigned  report_type;          /* (input,output,feature) */
 387         __s32    *value;                /* last known value(s) */
 388         __s32     logical_minimum;
 389         __s32     logical_maximum;
 390         __s32     physical_minimum;
 391         __s32     physical_maximum;
 392         __s32     unit_exponent;
 393         unsigned  unit;
 394         struct hid_report *report;      /* associated report */
 395         unsigned index;                 /* index into report->field[] */
 396         /* hidinput data */
 397         struct hid_input *hidinput;     /* associated input structure */
 398         __u16 dpad;                     /* dpad input code */
 399 };
 400
 401 #define HID_MAX_FIELDS 256
 402
 403 struct hid_report {
 404         struct list_head list;
 405         unsigned id;                                    /* id of this report */
 406         unsigned type;                                  /* report type */
 407         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 408         unsigned maxfield;                              /* maximum valid field index */
 409         unsigned size;                                  /* size of the report (bits) */
 410         struct hid_device *device;                      /* associated device */
 411 };
 412
 413 #define HID_MAX_IDS 256
 414
 415 struct hid_report_enum {
 416         unsigned numbered;
 417         struct list_head report_list;
 418         struct hid_report *report_id_hash[HID_MAX_IDS];
 419 };
 420
 421 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 422 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 423 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 424 #define HID_OUTPUT_FIFO_SIZE    64
 425
 426 struct hid_control_fifo {
 427         unsigned char dir;
 428         struct hid_report *report;
 429         char *raw_report;
 430 };
 431
 432 struct hid_output_fifo {
 433         struct hid_report *report;
 434         char *raw_report;
 435 };
 436
 437 #define HID_CLAIMED_INPUT       1
 438 #define HID_CLAIMED_HIDDEV      2
 439 #define HID_CLAIMED_HIDRAW      4
 440
 441 #define HID_STAT_ADDED          1
 442 #define HID_STAT_PARSED         2
 443
 444 struct hid_input {
 445         struct list_head list;
 446         struct hid_report *report;
 447         struct input_dev *input;
 448 };
 449
 450 enum hid_type {
 451         HID_TYPE_OTHER = 0,
 452         HID_TYPE_USBMOUSE,
 453         HID_TYPE_USBNONE
 454 };
 455
 456 struct hid_driver;
 457 struct hid_ll_driver;
 458
 459 struct hid_device {                                                     /* device report descriptor */
 460         __u8 *dev_rdesc;
 461         unsigned dev_rsize;
 462         __u8 *rdesc;
 463         unsigned rsize;
 464         struct hid_collection *collection;                              /* List of HID collections */
 465         unsigned collection_size;                                       /* Number of allocated hid_collections */
 466         unsigned maxcollection;                                         /* Number of parsed collections */
 467         unsigned maxapplication;                                        /* Number of applications */
 468         __u16 bus;                                                      /* BUS ID */
 469         __u16 group;                                                    /* Report group */
 470         __u32 vendor;                                                   /* Vendor ID */
 471         __u32 product;                                                  /* Product ID */
 472         __u32 version;                                                  /* HID version */
 473         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 474         unsigned country;                                               /* HID country */
 475         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 476         struct work_struct led_work;                                    /* delayed LED worker */
 477
 478         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
 479         struct semaphore driver_input_lock;                             /* protects the current driver */
 480         struct device dev;                                              /* device */
 481         struct hid_driver *driver;
 482         struct hid_ll_driver *ll_driver;
 483
 484 #ifdef CONFIG_HID_BATTERY_STRENGTH
 485         /*
 486          * Power supply information for HID devices which report
 487          * battery strength. power_supply is registered iff
 488          * battery.name is non-NULL.
 489          */
 490         struct power_supply battery;
 491         __s32 battery_min;
 492         __s32 battery_max;
 493         __s32 battery_report_type;
 494         __s32 battery_report_id;
 495 #endif
 496
 497         unsigned int status;                                            /* see STAT flags above */
 498         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 499         unsigned quirks;                                                /* Various quirks the device can pull on us */
 500         bool io_started;                                                /* Protected by driver_lock. If IO has started */
 501
 502         struct list_head inputs;                                        /* The list of inputs */
 503         void *hiddev;                                                   /* The hiddev structure */
 504         void *hidraw;
 505         int minor;                                                      /* Hiddev minor number */
 506
 507         int open;                                                       /* is the device open by anyone? */
 508         char name[128];                                                 /* Device name */
 509         char phys[64];                                                  /* Device physical location */
 510         char uniq[64];                                                  /* Device unique identifier (serial #) */
 511
 512         void *driver_data;
 513
 514         /* temporary hid_ff handling (until moved to the drivers) */
 515         int (*ff_init)(struct hid_device *);
 516
 517         /* hiddev event handler */
 518         int (*hiddev_connect)(struct hid_device *, unsigned int);
 519         void (*hiddev_disconnect)(struct hid_device *);
 520         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 521                                   struct hid_usage *, __s32);
 522         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 523
 524         /* debugging support via debugfs */
 525         unsigned short debug;
 526         struct dentry *debug_dir;
 527         struct dentry *debug_rdesc;
 528         struct dentry *debug_events;
 529         struct list_head debug_list;
 530         spinlock_t  debug_list_lock;
 531         wait_queue_head_t debug_wait;
 532 };
 533
 534 static inline void *hid_get_drvdata(struct hid_device *hdev)
 535 {
 536         return dev_get_drvdata(&hdev->dev);
 537 }
 538
 539 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 540 {
 541         dev_set_drvdata(&hdev->dev, data);
 542 }
 543
 544 #define HID_GLOBAL_STACK_SIZE 4
 545 #define HID_COLLECTION_STACK_SIZE 4
 546
 547 #define HID_SCAN_FLAG_MT_WIN_8                  0x00000001
 548
 549 struct hid_parser {
 550         struct hid_global     global;
 551         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 552         unsigned              global_stack_ptr;
 553         struct hid_local      local;
 554         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 555         unsigned              collection_stack_ptr;
 556         struct hid_device    *device;
 557         unsigned              scan_flags;
 558 };
 559
 560 struct hid_class_descriptor {
 561         __u8  bDescriptorType;
 562         __le16 wDescriptorLength;
 563 } __attribute__ ((packed));
 564
 565 struct hid_descriptor {
 566         __u8  bLength;
 567         __u8  bDescriptorType;
 568         __le16 bcdHID;
 569         __u8  bCountryCode;
 570         __u8  bNumDescriptors;
 571
 572         struct hid_class_descriptor desc[1];
 573 } __attribute__ ((packed));
 574
 575 #define HID_DEVICE(b, g, ven, prod)                                     \
 576         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 577 #define HID_USB_DEVICE(ven, prod)                               \
 578         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 579 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 580         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 581 #define HID_I2C_DEVICE(ven, prod)                               \
 582         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
 583
 584 #define HID_REPORT_ID(rep) \
 585         .report_type = (rep)
 586 #define HID_USAGE_ID(uhid, utype, ucode) \
 587         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 588 /* we don't want to catch types and codes equal to 0 */
 589 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 590
 591 struct hid_report_id {
 592         __u32 report_type;
 593 };
 594 struct hid_usage_id {
 595         __u32 usage_hid;
 596         __u32 usage_type;
 597         __u32 usage_code;
 598 };
 599
 600 /**
 601  * struct hid_driver
 602  * @name: driver name (e.g. "Footech_bar-wheel")
 603  * @id_table: which devices is this driver for (must be non-NULL for probe
 604  *            to be called)
 605  * @dyn_list: list of dynamically added device ids
 606  * @dyn_lock: lock protecting @dyn_list
 607  * @probe: new device inserted
 608  * @remove: device removed (NULL if not a hot-plug capable driver)
 609  * @report_table: on which reports to call raw_event (NULL means all)
 610  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 611  * @usage_table: on which events to call event (NULL means all)
 612  * @event: if usage in usage_table, this hook is called (NULL means nop)
 613  * @report: this hook is called after parsing a report (NULL means nop)
 614  * @report_fixup: called before report descriptor parsing (NULL means nop)
 615  * @input_mapping: invoked on input registering before mapping an usage
 616  * @input_mapped: invoked on input registering after mapping an usage
 617  * @input_configured: invoked just before the device is registered
 618  * @feature_mapping: invoked on feature registering
 619  * @suspend: invoked on suspend (NULL means nop)
 620  * @resume: invoked on resume if device was not reset (NULL means nop)
 621  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 622  *
 623  * probe should return -errno on error, or 0 on success. During probe,
 624  * input will not be passed to raw_event unless hid_device_io_start is
 625  * called.
 626  *
 627  * raw_event and event should return 0 on no action performed, 1 when no
 628  * further processing should be done and negative on error
 629  *
 630  * input_mapping shall return a negative value to completely ignore this usage
 631  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 632  * usage by generic code (no special handling needed) or positive to skip
 633  * generic parsing (needed special handling which was done in the hook already)
 634  * input_mapped shall return negative to inform the layer that this usage
 635  * should not be considered for further processing or zero to notify that
 636  * no processing was performed and should be done in a generic manner
 637  * Both these functions may be NULL which means the same behavior as returning
 638  * zero from them.
 639  */
 640 struct hid_driver {
 641         char *name;
 642         const struct hid_device_id *id_table;
 643
 644         struct list_head dyn_list;
 645         spinlock_t dyn_lock;
 646
 647         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 648         void (*remove)(struct hid_device *dev);
 649
 650         const struct hid_report_id *report_table;
 651         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 652                         u8 *data, int size);
 653         const struct hid_usage_id *usage_table;
 654         int (*event)(struct hid_device *hdev, struct hid_field *field,
 655                         struct hid_usage *usage, __s32 value);
 656         void (*report)(struct hid_device *hdev, struct hid_report *report);
 657
 658         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 659                         unsigned int *size);
 660
 661         int (*input_mapping)(struct hid_device *hdev,
 662                         struct hid_input *hidinput, struct hid_field *field,
 663                         struct hid_usage *usage, unsigned long **bit, int *max);
 664         int (*input_mapped)(struct hid_device *hdev,
 665                         struct hid_input *hidinput, struct hid_field *field,
 666                         struct hid_usage *usage, unsigned long **bit, int *max);
 667         void (*input_configured)(struct hid_device *hdev,
 668                                  struct hid_input *hidinput);
 669         void (*feature_mapping)(struct hid_device *hdev,
 670                         struct hid_field *field,
 671                         struct hid_usage *usage);
 672 #ifdef CONFIG_PM
 673         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 674         int (*resume)(struct hid_device *hdev);
 675         int (*reset_resume)(struct hid_device *hdev);
 676 #endif
 677 /* private: */
 678         struct device_driver driver;
 679 };
 680
 681 /**
 682  * hid_ll_driver - low level driver callbacks
 683  * @start: called on probe to start the device
 684  * @stop: called on remove
 685  * @open: called by input layer on open
 686  * @close: called by input layer on close
 687  * @parse: this method is called only once to parse the device data,
 688  *         shouldn't allocate anything to not leak memory
 689  * @request: send report request to device (e.g. feature report)
 690  * @wait: wait for buffered io to complete (send/recv reports)
 691  * @raw_request: send raw report request to device (e.g. feature report)
 692  * @output_report: send output report to device
 693  * @idle: send idle request to device
 694  */
 695 struct hid_ll_driver {
 696         int (*start)(struct hid_device *hdev);
 697         void (*stop)(struct hid_device *hdev);
 698
 699         int (*open)(struct hid_device *hdev);
 700         void (*close)(struct hid_device *hdev);
 701
 702         int (*power)(struct hid_device *hdev, int level);
 703
 704         int (*parse)(struct hid_device *hdev);
 705
 706         void (*request)(struct hid_device *hdev,
 707                         struct hid_report *report, int reqtype);
 708
 709         int (*wait)(struct hid_device *hdev);
 710
 711         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
 712                             __u8 *buf, size_t len, unsigned char rtype,
 713                             int reqtype);
 714
 715         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 716
 717         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 718 };
 719
 720 #define PM_HINT_FULLON  1<<5
 721 #define PM_HINT_NORMAL  1<<1
 722
 723 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 724 /* We ignore a few input applications that are not widely used */
 725 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 726
 727 /* HID core API */
 728
 729 extern int hid_debug;
 730
 731 extern bool hid_ignore(struct hid_device *);
 732 extern int hid_add_device(struct hid_device *);
 733 extern void hid_destroy_device(struct hid_device *);
 734
 735 extern int __must_check __hid_register_driver(struct hid_driver *,
 736                 struct module *, const char *mod_name);
 737
 738 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 739 #define hid_register_driver(driver) \
 740         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 741
 742 extern void hid_unregister_driver(struct hid_driver *);
 743
 744 /**
 745  * module_hid_driver() - Helper macro for registering a HID driver
 746  * @__hid_driver: hid_driver struct
 747  *
 748  * Helper macro for HID drivers which do not do anything special in module
 749  * init/exit. This eliminates a lot of boilerplate. Each module may only
 750  * use this macro once, and calling it replaces module_init() and module_exit()
 751  */
 752 #define module_hid_driver(__hid_driver) \
 753         module_driver(__hid_driver, hid_register_driver, \
 754                       hid_unregister_driver)
 755
 756 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 757 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 758 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 759 extern void hidinput_disconnect(struct hid_device *);
 760
 761 int hid_set_field(struct hid_field *, unsigned, __s32);
 762 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 763 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 764 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 765 unsigned int hidinput_count_leds(struct hid_device *hid);
 766 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 767 void hid_output_report(struct hid_report *report, __u8 *data);
 768 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
 769 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 770 struct hid_device *hid_allocate_device(void);
 771 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 772 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 773 struct hid_report *hid_validate_values(struct hid_device *hid,
 774                                        unsigned int type, unsigned int id,
 775                                        unsigned int field_index,
 776                                        unsigned int report_counts);
 777 int hid_open_report(struct hid_device *device);
 778 int hid_check_keys_pressed(struct hid_device *hid);
 779 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 780 void hid_disconnect(struct hid_device *hid);
 781 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 782                                          const struct hid_device_id *id);
 783 s32 hid_snto32(__u32 value, unsigned n);
 784
 785 /**
 786  * hid_device_io_start - enable HID input during probe, remove
 787  *
 788  * @hid - the device
 789  *
 790  * This should only be called during probe or remove and only be
 791  * called by the thread calling probe or remove. It will allow
 792  * incoming packets to be delivered to the driver.
 793  */
 794 static inline void hid_device_io_start(struct hid_device *hid) {
 795         if (hid->io_started) {
 796                 dev_warn(&hid->dev, "io already started");
 797                 return;
 798         }
 799         hid->io_started = true;
 800         up(&hid->driver_input_lock);
 801 }
 802
 803 /**
 804  * hid_device_io_stop - disable HID input during probe, remove
 805  *
 806  * @hid - the device
 807  *
 808  * Should only be called after hid_device_io_start. It will prevent
 809  * incoming packets from going to the driver for the duration of
 810  * probe, remove. If called during probe, packets will still go to the
 811  * driver after probe is complete. This function should only be called
 812  * by the thread calling probe or remove.
 813  */
 814 static inline void hid_device_io_stop(struct hid_device *hid) {
 815         if (!hid->io_started) {
 816                 dev_warn(&hid->dev, "io already stopped");
 817                 return;
 818         }
 819         hid->io_started = false;
 820         down(&hid->driver_input_lock);
 821 }
 822
 823 /**
 824  * hid_map_usage - map usage input bits
 825  *
 826  * @hidinput: hidinput which we are interested in
 827  * @usage: usage to fill in
 828  * @bit: pointer to input->{}bit (out parameter)
 829  * @max: maximal valid usage->code to consider later (out parameter)
 830  * @type: input event type (EV_KEY, EV_REL, ...)
 831  * @c: code which corresponds to this usage and type
 832  */
 833 static inline void hid_map_usage(struct hid_input *hidinput,
 834                 struct hid_usage *usage, unsigned long **bit, int *max,
 835                 __u8 type, __u16 c)
 836 {
 837         struct input_dev *input = hidinput->input;
 838
 839         usage->type = type;
 840         usage->code = c;
 841
 842         switch (type) {
 843         case EV_ABS:
 844                 *bit = input->absbit;
 845                 *max = ABS_MAX;
 846                 break;
 847         case EV_REL:
 848                 *bit = input->relbit;
 849                 *max = REL_MAX;
 850                 break;
 851         case EV_KEY:
 852                 *bit = input->keybit;
 853                 *max = KEY_MAX;
 854                 break;
 855         case EV_LED:
 856                 *bit = input->ledbit;
 857                 *max = LED_MAX;
 858                 break;
 859         }
 860 }
 861
 862 /**
 863  * hid_map_usage_clear - map usage input bits and clear the input bit
 864  *
 865  * The same as hid_map_usage, except the @c bit is also cleared in supported
 866  * bits (@bit).
 867  */
 868 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 869                 struct hid_usage *usage, unsigned long **bit, int *max,
 870                 __u8 type, __u16 c)
 871 {
 872         hid_map_usage(hidinput, usage, bit, max, type, c);
 873         clear_bit(c, *bit);
 874 }
 875
 876 /**
 877  * hid_parse - parse HW reports
 878  *
 879  * @hdev: hid device
 880  *
 881  * Call this from probe after you set up the device (if needed). Your
 882  * report_fixup will be called (if non-NULL) after reading raw report from
 883  * device before passing it to hid layer for real parsing.
 884  */
 885 static inline int __must_check hid_parse(struct hid_device *hdev)
 886 {
 887         return hid_open_report(hdev);
 888 }
 889
 890 /**
 891  * hid_hw_start - start underlaying HW
 892  *
 893  * @hdev: hid device
 894  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 895  *
 896  * Call this in probe function *after* hid_parse. This will setup HW buffers
 897  * and start the device (if not deffered to device open). hid_hw_stop must be
 898  * called if this was successful.
 899  */
 900 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 901                 unsigned int connect_mask)
 902 {
 903         int ret = hdev->ll_driver->start(hdev);
 904         if (ret || !connect_mask)
 905                 return ret;
 906         ret = hid_connect(hdev, connect_mask);
 907         if (ret)
 908                 hdev->ll_driver->stop(hdev);
 909         return ret;
 910 }
 911
 912 /**
 913  * hid_hw_stop - stop underlaying HW
 914  *
 915  * @hdev: hid device
 916  *
 917  * This is usually called from remove function or from probe when something
 918  * failed and hid_hw_start was called already.
 919  */
 920 static inline void hid_hw_stop(struct hid_device *hdev)
 921 {
 922         hid_disconnect(hdev);
 923         hdev->ll_driver->stop(hdev);
 924 }
 925
 926 /**
 927  * hid_hw_open - signal underlaying HW to start delivering events
 928  *
 929  * @hdev: hid device
 930  *
 931  * Tell underlying HW to start delivering events from the device.
 932  * This function should be called sometime after successful call
 933  * to hid_hiw_start().
 934  */
 935 static inline int __must_check hid_hw_open(struct hid_device *hdev)
 936 {
 937         return hdev->ll_driver->open(hdev);
 938 }
 939
 940 /**
 941  * hid_hw_close - signal underlaying HW to stop delivering events
 942  *
 943  * @hdev: hid device
 944  *
 945  * This function indicates that we are not interested in the events
 946  * from this device anymore. Delivery of events may or may not stop,
 947  * depending on the number of users still outstanding.
 948  */
 949 static inline void hid_hw_close(struct hid_device *hdev)
 950 {
 951         hdev->ll_driver->close(hdev);
 952 }
 953
 954 /**
 955  * hid_hw_power - requests underlying HW to go into given power mode
 956  *
 957  * @hdev: hid device
 958  * @level: requested power level (one of %PM_HINT_* defines)
 959  *
 960  * This function requests underlying hardware to enter requested power
 961  * mode.
 962  */
 963
 964 static inline int hid_hw_power(struct hid_device *hdev, int level)
 965 {
 966         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 967 }
 968
 969
 970 /**
 971  * hid_hw_request - send report request to device
 972  *
 973  * @hdev: hid device
 974  * @report: report to send
 975  * @reqtype: hid request type
 976  */
 977 static inline void hid_hw_request(struct hid_device *hdev,
 978                                   struct hid_report *report, int reqtype)
 979 {
 980         if (hdev->ll_driver->request)
 981                 return hdev->ll_driver->request(hdev, report, reqtype);
 982
 983         __hid_request(hdev, report, reqtype);
 984 }
 985
 986 /**
 987  * hid_hw_raw_request - send report request to device
 988  *
 989  * @hdev: hid device
 990  * @reportnum: report ID
 991  * @buf: in/out data to transfer
 992  * @len: length of buf
 993  * @rtype: HID report type
 994  * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
 995  *
 996  * @return: count of data transfered, negative if error
 997  *
 998  * Same behavior as hid_hw_request, but with raw buffers instead.
 999  */
1000 static inline int hid_hw_raw_request(struct hid_device *hdev,
1001                                   unsigned char reportnum, __u8 *buf,
1002                                   size_t len, unsigned char rtype, int reqtype)
1003 {
1004         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1005                 return -EINVAL;
1006
1007         return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1008                                                     rtype, reqtype);
1009 }
1010
1011 /**
1012  * hid_hw_output_report - send output report to device
1013  *
1014  * @hdev: hid device
1015  * @buf: raw data to transfer
1016  * @len: length of buf
1017  *
1018  * @return: count of data transfered, negative if error
1019  */
1020 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1021                                         size_t len)
1022 {
1023         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1024                 return -EINVAL;
1025
1026         if (hdev->ll_driver->output_report)
1027                 return hdev->ll_driver->output_report(hdev, buf, len);
1028
1029         return -ENOSYS;
1030 }
1031
1032 /**
1033  * hid_hw_idle - send idle request to device
1034  *
1035  * @hdev: hid device
1036  * @report: report to control
1037  * @idle: idle state
1038  * @reqtype: hid request type
1039  */
1040 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1041                 int reqtype)
1042 {
1043         if (hdev->ll_driver->idle)
1044                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1045
1046         return 0;
1047 }
1048
1049 /**
1050  * hid_hw_wait - wait for buffered io to complete
1051  *
1052  * @hdev: hid device
1053  */
1054 static inline void hid_hw_wait(struct hid_device *hdev)
1055 {
1056         if (hdev->ll_driver->wait)
1057                 hdev->ll_driver->wait(hdev);
1058 }
1059
1060 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1061                 int interrupt);
1062
1063 /* HID quirks API */
1064 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
1065 int usbhid_quirks_init(char **quirks_param);
1066 void usbhid_quirks_exit(void);
1067
1068 #ifdef CONFIG_HID_PID
1069 int hid_pidff_init(struct hid_device *hid);
1070 #else
1071 #define hid_pidff_init NULL
1072 #endif
1073
1074 #define dbg_hid(format, arg...)                                         \
1075 do {                                                                    \
1076         if (hid_debug)                                                  \
1077                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1078 } while (0)
1079
1080 #define hid_printk(level, hid, fmt, arg...)             \
1081         dev_printk(level, &(hid)->dev, fmt, ##arg)
1082 #define hid_emerg(hid, fmt, arg...)                     \
1083         dev_emerg(&(hid)->dev, fmt, ##arg)
1084 #define hid_crit(hid, fmt, arg...)                      \
1085         dev_crit(&(hid)->dev, fmt, ##arg)
1086 #define hid_alert(hid, fmt, arg...)                     \
1087         dev_alert(&(hid)->dev, fmt, ##arg)
1088 #define hid_err(hid, fmt, arg...)                       \
1089         dev_err(&(hid)->dev, fmt, ##arg)
1090 #define hid_notice(hid, fmt, arg...)                    \
1091         dev_notice(&(hid)->dev, fmt, ##arg)
1092 #define hid_warn(hid, fmt, arg...)                      \
1093         dev_warn(&(hid)->dev, fmt, ##arg)
1094 #define hid_info(hid, fmt, arg...)                      \
1095         dev_info(&(hid)->dev, fmt, ##arg)
1096 #define hid_dbg(hid, fmt, arg...)                       \
1097         dev_dbg(&(hid)->dev, fmt, ##arg)
1098
1099 #endif