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