include/linux/hid.h

   1 #ifndef __HID_H
   2 #define __HID_H
   3
   4 /*
   5  *  Copyright (c) 1999 Andreas Gal
   6  *  Copyright (c) 2000-2001 Vojtech Pavlik
   7  *  Copyright (c) 2006-2007 Jiri Kosina
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  *
  25  * Should you need to contact me, the author, you can do so either by
  26  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  27  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  28  */
  29
  30 /*
  31  * USB HID (Human Interface Device) interface class code
  32  */
  33
  34 #define USB_INTERFACE_CLASS_HID         3
  35
  36 /*
  37  * USB HID interface subclass and protocol codes
  38  */
  39
  40 #define USB_INTERFACE_SUBCLASS_BOOT     1
  41 #define USB_INTERFACE_PROTOCOL_KEYBOARD 1
  42 #define USB_INTERFACE_PROTOCOL_MOUSE    2
  43
  44 /*
  45  * HID class requests
  46  */
  47
  48 #define HID_REQ_GET_REPORT              0x01
  49 #define HID_REQ_GET_IDLE                0x02
  50 #define HID_REQ_GET_PROTOCOL            0x03
  51 #define HID_REQ_SET_REPORT              0x09
  52 #define HID_REQ_SET_IDLE                0x0A
  53 #define HID_REQ_SET_PROTOCOL            0x0B
  54
  55 /*
  56  * HID class descriptor types
  57  */
  58
  59 #define HID_DT_HID                      (USB_TYPE_CLASS | 0x01)
  60 #define HID_DT_REPORT                   (USB_TYPE_CLASS | 0x02)
  61 #define HID_DT_PHYSICAL                 (USB_TYPE_CLASS | 0x03)
  62
  63 #define HID_MAX_DESCRIPTOR_SIZE         4096
  64
  65 #ifdef __KERNEL__
  66
  67 #include <linux/types.h>
  68 #include <linux/slab.h>
  69 #include <linux/list.h>
  70 #include <linux/mod_devicetable.h> /* hid_device_id */
  71 #include <linux/timer.h>
  72 #include <linux/workqueue.h>
  73 #include <linux/input.h>
  74 #include <linux/semaphore.h>
  75 #include <linux/power_supply.h>
  76
  77 /*
  78  * We parse each description item into this structure. Short items data
  79  * values are expanded to 32-bit signed int, long items contain a pointer
  80  * into the data area.
  81  */
  82
  83 struct hid_item {
  84         unsigned  format;
  85         __u8      size;
  86         __u8      type;
  87         __u8      tag;
  88         union {
  89             __u8   u8;
  90             __s8   s8;
  91             __u16  u16;
  92             __s16  s16;
  93             __u32  u32;
  94             __s32  s32;
  95             __u8  *longdata;
  96         } data;
  97 };
  98
  99 /*
 100  * HID report item format
 101  */
 102
 103 #define HID_ITEM_FORMAT_SHORT   0
 104 #define HID_ITEM_FORMAT_LONG    1
 105
 106 /*
 107  * Special tag indicating long items
 108  */
 109
 110 #define HID_ITEM_TAG_LONG       15
 111
 112 /*
 113  * HID report descriptor item type (prefix bit 2,3)
 114  */
 115
 116 #define HID_ITEM_TYPE_MAIN              0
 117 #define HID_ITEM_TYPE_GLOBAL            1
 118 #define HID_ITEM_TYPE_LOCAL             2
 119 #define HID_ITEM_TYPE_RESERVED          3
 120
 121 /*
 122  * HID report descriptor main item tags
 123  */
 124
 125 #define HID_MAIN_ITEM_TAG_INPUT                 8
 126 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 127 #define HID_MAIN_ITEM_TAG_FEATURE               11
 128 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 129 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 130
 131 /*
 132  * HID report descriptor main item contents
 133  */
 134
 135 #define HID_MAIN_ITEM_CONSTANT          0x001
 136 #define HID_MAIN_ITEM_VARIABLE          0x002
 137 #define HID_MAIN_ITEM_RELATIVE          0x004
 138 #define HID_MAIN_ITEM_WRAP              0x008
 139 #define HID_MAIN_ITEM_NONLINEAR         0x010
 140 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 141 #define HID_MAIN_ITEM_NULL_STATE        0x040
 142 #define HID_MAIN_ITEM_VOLATILE          0x080
 143 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 144
 145 /*
 146  * HID report descriptor collection item types
 147  */
 148
 149 #define HID_COLLECTION_PHYSICAL         0
 150 #define HID_COLLECTION_APPLICATION      1
 151 #define HID_COLLECTION_LOGICAL          2
 152
 153 /*
 154  * HID report descriptor global item tags
 155  */
 156
 157 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 158 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 159 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 160 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 161 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 162 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 163 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 164 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 165 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 166 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 167 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 168 #define HID_GLOBAL_ITEM_TAG_POP                 11
 169
 170 /*
 171  * HID report descriptor local item tags
 172  */
 173
 174 #define HID_LOCAL_ITEM_TAG_USAGE                0
 175 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 176 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 177 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 178 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 179 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 180 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 181 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 182 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 183 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 184
 185 /*
 186  * HID usage tables
 187  */
 188
 189 #define HID_USAGE_PAGE          0xffff0000
 190
 191 #define HID_UP_UNDEFINED        0x00000000
 192 #define HID_UP_GENDESK          0x00010000
 193 #define HID_UP_SIMULATION       0x00020000
 194 #define HID_UP_GENDEVCTRLS      0x00060000
 195 #define HID_UP_KEYBOARD         0x00070000
 196 #define HID_UP_LED              0x00080000
 197 #define HID_UP_BUTTON           0x00090000
 198 #define HID_UP_ORDINAL          0x000a0000
 199 #define HID_UP_CONSUMER         0x000c0000
 200 #define HID_UP_DIGITIZER        0x000d0000
 201 #define HID_UP_PID              0x000f0000
 202 #define HID_UP_HPVENDOR         0xff7f0000
 203 #define HID_UP_MSVENDOR         0xff000000
 204 #define HID_UP_CUSTOM           0x00ff0000
 205 #define HID_UP_LOGIVENDOR       0xffbc0000
 206
 207 #define HID_USAGE               0x0000ffff
 208
 209 #define HID_GD_POINTER          0x00010001
 210 #define HID_GD_MOUSE            0x00010002
 211 #define HID_GD_JOYSTICK         0x00010004
 212 #define HID_GD_GAMEPAD          0x00010005
 213 #define HID_GD_KEYBOARD         0x00010006
 214 #define HID_GD_KEYPAD           0x00010007
 215 #define HID_GD_MULTIAXIS        0x00010008
 216 #define HID_GD_X                0x00010030
 217 #define HID_GD_Y                0x00010031
 218 #define HID_GD_Z                0x00010032
 219 #define HID_GD_RX               0x00010033
 220 #define HID_GD_RY               0x00010034
 221 #define HID_GD_RZ               0x00010035
 222 #define HID_GD_SLIDER           0x00010036
 223 #define HID_GD_DIAL             0x00010037
 224 #define HID_GD_WHEEL            0x00010038
 225 #define HID_GD_HATSWITCH        0x00010039
 226 #define HID_GD_BUFFER           0x0001003a
 227 #define HID_GD_BYTECOUNT        0x0001003b
 228 #define HID_GD_MOTION           0x0001003c
 229 #define HID_GD_START            0x0001003d
 230 #define HID_GD_SELECT           0x0001003e
 231 #define HID_GD_VX               0x00010040
 232 #define HID_GD_VY               0x00010041
 233 #define HID_GD_VZ               0x00010042
 234 #define HID_GD_VBRX             0x00010043
 235 #define HID_GD_VBRY             0x00010044
 236 #define HID_GD_VBRZ             0x00010045
 237 #define HID_GD_VNO              0x00010046
 238 #define HID_GD_FEATURE          0x00010047
 239 #define HID_GD_UP               0x00010090
 240 #define HID_GD_DOWN             0x00010091
 241 #define HID_GD_RIGHT            0x00010092
 242 #define HID_GD_LEFT             0x00010093
 243
 244 #define HID_DC_BATTERYSTRENGTH  0x00060020
 245
 246 #define HID_DG_DIGITIZER        0x000d0001
 247 #define HID_DG_PEN              0x000d0002
 248 #define HID_DG_LIGHTPEN         0x000d0003
 249 #define HID_DG_TOUCHSCREEN      0x000d0004
 250 #define HID_DG_TOUCHPAD         0x000d0005
 251 #define HID_DG_STYLUS           0x000d0020
 252 #define HID_DG_PUCK             0x000d0021
 253 #define HID_DG_FINGER           0x000d0022
 254 #define HID_DG_TIPPRESSURE      0x000d0030
 255 #define HID_DG_BARRELPRESSURE   0x000d0031
 256 #define HID_DG_INRANGE          0x000d0032
 257 #define HID_DG_TOUCH            0x000d0033
 258 #define HID_DG_UNTOUCH          0x000d0034
 259 #define HID_DG_TAP              0x000d0035
 260 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 261 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 262 #define HID_DG_INVERT           0x000d003c
 263 #define HID_DG_TIPSWITCH        0x000d0042
 264 #define HID_DG_TIPSWITCH2       0x000d0043
 265 #define HID_DG_BARRELSWITCH     0x000d0044
 266 #define HID_DG_ERASER           0x000d0045
 267 #define HID_DG_TABLETPICK       0x000d0046
 268 /*
 269  * as of May 20, 2009 the usages below are not yet in the official USB spec
 270  * but are being pushed by Microsft as described in their paper "Digitizer
 271  * Drivers for Windows Touch and Pen-Based Computers"
 272  */
 273 #define HID_DG_CONFIDENCE       0x000d0047
 274 #define HID_DG_WIDTH            0x000d0048
 275 #define HID_DG_HEIGHT           0x000d0049
 276 #define HID_DG_CONTACTID        0x000d0051
 277 #define HID_DG_INPUTMODE        0x000d0052
 278 #define HID_DG_DEVICEINDEX      0x000d0053
 279 #define HID_DG_CONTACTCOUNT     0x000d0054
 280 #define HID_DG_CONTACTMAX       0x000d0055
 281
 282 /*
 283  * HID report types --- Ouch! HID spec says 1 2 3!
 284  */
 285
 286 #define HID_INPUT_REPORT        0
 287 #define HID_OUTPUT_REPORT       1
 288 #define HID_FEATURE_REPORT      2
 289
 290 /*
 291  * HID connect requests
 292  */
 293
 294 #define HID_CONNECT_HIDINPUT            0x01
 295 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 296 #define HID_CONNECT_HIDRAW              0x04
 297 #define HID_CONNECT_HIDDEV              0x08
 298 #define HID_CONNECT_HIDDEV_FORCE        0x10
 299 #define HID_CONNECT_FF                  0x20
 300 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 301                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 302
 303 /*
 304  * HID device quirks.
 305  */
 306
 307 /*
 308  * Increase this if you need to configure more HID quirks at module load time
 309  */
 310 #define MAX_USBHID_BOOT_QUIRKS 4
 311
 312 #define HID_QUIRK_INVERT                        0x00000001
 313 #define HID_QUIRK_NOTOUCH                       0x00000002
 314 #define HID_QUIRK_IGNORE                        0x00000004
 315 #define HID_QUIRK_NOGET                         0x00000008
 316 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 317 #define HID_QUIRK_BADPAD                        0x00000020
 318 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 319 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 320 #define HID_QUIRK_MULTITOUCH                    0x00000100
 321 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 322 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 323 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 324 #define HID_QUIRK_NO_IGNORE                     0x40000000
 325 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 326
 327 /*
 328  * HID device groups
 329  */
 330 #define HID_GROUP_GENERIC                       0x0001
 331
 332 /*
 333  * This is the global environment of the parser. This information is
 334  * persistent for main-items. The global environment can be saved and
 335  * restored with PUSH/POP statements.
 336  */
 337
 338 struct hid_global {
 339         unsigned usage_page;
 340         __s32    logical_minimum;
 341         __s32    logical_maximum;
 342         __s32    physical_minimum;
 343         __s32    physical_maximum;
 344         __s32    unit_exponent;
 345         unsigned unit;
 346         unsigned report_id;
 347         unsigned report_size;
 348         unsigned report_count;
 349 };
 350
 351 /*
 352  * This is the local environment. It is persistent up the next main-item.
 353  */
 354
 355 #define HID_MAX_USAGES                  12288
 356 #define HID_DEFAULT_NUM_COLLECTIONS     16
 357
 358 struct hid_local {
 359         unsigned usage[HID_MAX_USAGES]; /* usage array */
 360         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 361         unsigned usage_index;
 362         unsigned usage_minimum;
 363         unsigned delimiter_depth;
 364         unsigned delimiter_branch;
 365 };
 366
 367 /*
 368  * This is the collection stack. We climb up the stack to determine
 369  * application and function of each field.
 370  */
 371
 372 struct hid_collection {
 373         unsigned type;
 374         unsigned usage;
 375         unsigned level;
 376 };
 377
 378 struct hid_usage {
 379         unsigned  hid;                  /* hid usage code */
 380         unsigned  collection_index;     /* index into collection array */
 381         /* hidinput data */
 382         __u16     code;                 /* input driver code */
 383         __u8      type;                 /* input driver type */
 384         __s8      hat_min;              /* hat switch fun */
 385         __s8      hat_max;              /* ditto */
 386         __s8      hat_dir;              /* ditto */
 387 };
 388
 389 struct hid_input;
 390
 391 struct hid_field {
 392         unsigned  physical;             /* physical usage for this field */
 393         unsigned  logical;              /* logical usage for this field */
 394         unsigned  application;          /* application usage for this field */
 395         struct hid_usage *usage;        /* usage table for this function */
 396         unsigned  maxusage;             /* maximum usage index */
 397         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 398         unsigned  report_offset;        /* bit offset in the report */
 399         unsigned  report_size;          /* size of this field in the report */
 400         unsigned  report_count;         /* number of this field in the report */
 401         unsigned  report_type;          /* (input,output,feature) */
 402         __s32    *value;                /* last known value(s) */
 403         __s32     logical_minimum;
 404         __s32     logical_maximum;
 405         __s32     physical_minimum;
 406         __s32     physical_maximum;
 407         __s32     unit_exponent;
 408         unsigned  unit;
 409         struct hid_report *report;      /* associated report */
 410         unsigned index;                 /* index into report->field[] */
 411         /* hidinput data */
 412         struct hid_input *hidinput;     /* associated input structure */
 413         __u16 dpad;                     /* dpad input code */
 414 };
 415
 416 #define HID_MAX_FIELDS 128
 417
 418 struct hid_report {
 419         struct list_head list;
 420         unsigned id;                                    /* id of this report */
 421         unsigned type;                                  /* report type */
 422         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 423         unsigned maxfield;                              /* maximum valid field index */
 424         unsigned size;                                  /* size of the report (bits) */
 425         struct hid_device *device;                      /* associated device */
 426 };
 427
 428 struct hid_report_enum {
 429         unsigned numbered;
 430         struct list_head report_list;
 431         struct hid_report *report_id_hash[256];
 432 };
 433
 434 #define HID_REPORT_TYPES 3
 435
 436 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 437 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 438 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 439 #define HID_OUTPUT_FIFO_SIZE    64
 440
 441 struct hid_control_fifo {
 442         unsigned char dir;
 443         struct hid_report *report;
 444         char *raw_report;
 445 };
 446
 447 struct hid_output_fifo {
 448         struct hid_report *report;
 449         char *raw_report;
 450 };
 451
 452 #define HID_CLAIMED_INPUT       1
 453 #define HID_CLAIMED_HIDDEV      2
 454 #define HID_CLAIMED_HIDRAW      4
 455
 456 #define HID_STAT_ADDED          1
 457 #define HID_STAT_PARSED         2
 458
 459 struct hid_input {
 460         struct list_head list;
 461         struct hid_report *report;
 462         struct input_dev *input;
 463 };
 464
 465 enum hid_type {
 466         HID_TYPE_OTHER = 0,
 467         HID_TYPE_USBMOUSE,
 468         HID_TYPE_USBNONE
 469 };
 470
 471 struct hid_driver;
 472 struct hid_ll_driver;
 473
 474 struct hid_device {                                                     /* device report descriptor */
 475         __u8 *dev_rdesc;
 476         unsigned dev_rsize;
 477         __u8 *rdesc;
 478         unsigned rsize;
 479         struct hid_collection *collection;                              /* List of HID collections */
 480         unsigned collection_size;                                       /* Number of allocated hid_collections */
 481         unsigned maxcollection;                                         /* Number of parsed collections */
 482         unsigned maxapplication;                                        /* Number of applications */
 483         __u16 bus;                                                      /* BUS ID */
 484         __u16 group;                                                    /* Report group */
 485         __u32 vendor;                                                   /* Vendor ID */
 486         __u32 product;                                                  /* Product ID */
 487         __u32 version;                                                  /* HID version */
 488         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 489         unsigned country;                                               /* HID country */
 490         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 491
 492         struct semaphore driver_lock;                                   /* protects the current driver */
 493         struct device dev;                                              /* device */
 494         struct hid_driver *driver;
 495         struct hid_ll_driver *ll_driver;
 496
 497 #ifdef CONFIG_HID_BATTERY_STRENGTH
 498         /*
 499          * Power supply information for HID devices which report
 500          * battery strength. power_supply is registered iff
 501          * battery.name is non-NULL.
 502          */
 503         struct power_supply battery;
 504         __s32 battery_min;
 505         __s32 battery_max;
 506         __s32 battery_report_type;
 507         __s32 battery_report_id;
 508 #endif
 509
 510         unsigned int status;                                            /* see STAT flags above */
 511         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 512         unsigned quirks;                                                /* Various quirks the device can pull on us */
 513
 514         struct list_head inputs;                                        /* The list of inputs */
 515         void *hiddev;                                                   /* The hiddev structure */
 516         void *hidraw;
 517         int minor;                                                      /* Hiddev minor number */
 518
 519         int open;                                                       /* is the device open by anyone? */
 520         char name[128];                                                 /* Device name */
 521         char phys[64];                                                  /* Device physical location */
 522         char uniq[64];                                                  /* Device unique identifier (serial #) */
 523
 524         void *driver_data;
 525
 526         /* temporary hid_ff handling (until moved to the drivers) */
 527         int (*ff_init)(struct hid_device *);
 528
 529         /* hiddev event handler */
 530         int (*hiddev_connect)(struct hid_device *, unsigned int);
 531         void (*hiddev_disconnect)(struct hid_device *);
 532         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 533                                   struct hid_usage *, __s32);
 534         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 535
 536         /* handler for raw input (Get_Report) data, used by hidraw */
 537         int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
 538
 539         /* handler for raw output data, used by hidraw */
 540         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 541
 542         /* debugging support via debugfs */
 543         unsigned short debug;
 544         struct dentry *debug_dir;
 545         struct dentry *debug_rdesc;
 546         struct dentry *debug_events;
 547         struct list_head debug_list;
 548         wait_queue_head_t debug_wait;
 549 };
 550
 551 static inline void *hid_get_drvdata(struct hid_device *hdev)
 552 {
 553         return dev_get_drvdata(&hdev->dev);
 554 }
 555
 556 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 557 {
 558         dev_set_drvdata(&hdev->dev, data);
 559 }
 560
 561 #define HID_GLOBAL_STACK_SIZE 4
 562 #define HID_COLLECTION_STACK_SIZE 4
 563
 564 struct hid_parser {
 565         struct hid_global     global;
 566         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 567         unsigned              global_stack_ptr;
 568         struct hid_local      local;
 569         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 570         unsigned              collection_stack_ptr;
 571         struct hid_device    *device;
 572 };
 573
 574 struct hid_class_descriptor {
 575         __u8  bDescriptorType;
 576         __le16 wDescriptorLength;
 577 } __attribute__ ((packed));
 578
 579 struct hid_descriptor {
 580         __u8  bLength;
 581         __u8  bDescriptorType;
 582         __le16 bcdHID;
 583         __u8  bCountryCode;
 584         __u8  bNumDescriptors;
 585
 586         struct hid_class_descriptor desc[1];
 587 } __attribute__ ((packed));
 588
 589 #define HID_DEVICE(b, g, ven, prod)                                     \
 590         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 591 #define HID_USB_DEVICE(ven, prod)                               \
 592         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 593 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 594         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 595
 596 #define HID_REPORT_ID(rep) \
 597         .report_type = (rep)
 598 #define HID_USAGE_ID(uhid, utype, ucode) \
 599         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 600 /* we don't want to catch types and codes equal to 0 */
 601 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 602
 603 struct hid_report_id {
 604         __u32 report_type;
 605 };
 606 struct hid_usage_id {
 607         __u32 usage_hid;
 608         __u32 usage_type;
 609         __u32 usage_code;
 610 };
 611
 612 /**
 613  * struct hid_driver
 614  * @name: driver name (e.g. "Footech_bar-wheel")
 615  * @id_table: which devices is this driver for (must be non-NULL for probe
 616  *            to be called)
 617  * @dyn_list: list of dynamically added device ids
 618  * @dyn_lock: lock protecting @dyn_list
 619  * @probe: new device inserted
 620  * @remove: device removed (NULL if not a hot-plug capable driver)
 621  * @report_table: on which reports to call raw_event (NULL means all)
 622  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 623  * @usage_table: on which events to call event (NULL means all)
 624  * @event: if usage in usage_table, this hook is called (NULL means nop)
 625  * @report_fixup: called before report descriptor parsing (NULL means nop)
 626  * @input_mapping: invoked on input registering before mapping an usage
 627  * @input_mapped: invoked on input registering after mapping an usage
 628  * @feature_mapping: invoked on feature registering
 629  * @suspend: invoked on suspend (NULL means nop)
 630  * @resume: invoked on resume if device was not reset (NULL means nop)
 631  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 632  *
 633  * raw_event and event should return 0 on no action performed, 1 when no
 634  * further processing should be done and negative on error
 635  *
 636  * input_mapping shall return a negative value to completely ignore this usage
 637  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 638  * usage by generic code (no special handling needed) or positive to skip
 639  * generic parsing (needed special handling which was done in the hook already)
 640  * input_mapped shall return negative to inform the layer that this usage
 641  * should not be considered for further processing or zero to notify that
 642  * no processing was performed and should be done in a generic manner
 643  * Both these functions may be NULL which means the same behavior as returning
 644  * zero from them.
 645  */
 646 struct hid_driver {
 647         char *name;
 648         const struct hid_device_id *id_table;
 649
 650         struct list_head dyn_list;
 651         spinlock_t dyn_lock;
 652
 653         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 654         void (*remove)(struct hid_device *dev);
 655
 656         const struct hid_report_id *report_table;
 657         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 658                         u8 *data, int size);
 659         const struct hid_usage_id *usage_table;
 660         int (*event)(struct hid_device *hdev, struct hid_field *field,
 661                         struct hid_usage *usage, __s32 value);
 662
 663         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 664                         unsigned int *size);
 665
 666         int (*input_mapping)(struct hid_device *hdev,
 667                         struct hid_input *hidinput, struct hid_field *field,
 668                         struct hid_usage *usage, unsigned long **bit, int *max);
 669         int (*input_mapped)(struct hid_device *hdev,
 670                         struct hid_input *hidinput, struct hid_field *field,
 671                         struct hid_usage *usage, unsigned long **bit, int *max);
 672         void (*feature_mapping)(struct hid_device *hdev,
 673                         struct hid_field *field,
 674                         struct hid_usage *usage);
 675 #ifdef CONFIG_PM
 676         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 677         int (*resume)(struct hid_device *hdev);
 678         int (*reset_resume)(struct hid_device *hdev);
 679 #endif
 680 /* private: */
 681         struct device_driver driver;
 682 };
 683
 684 /**
 685  * hid_ll_driver - low level driver callbacks
 686  * @start: called on probe to start the device
 687  * @stop: called on remove
 688  * @open: called by input layer on open
 689  * @close: called by input layer on close
 690  * @hidinput_input_event: event input event (e.g. ff or leds)
 691  * @parse: this method is called only once to parse the device data,
 692  *         shouldn't allocate anything to not leak memory
 693  */
 694 struct hid_ll_driver {
 695         int (*start)(struct hid_device *hdev);
 696         void (*stop)(struct hid_device *hdev);
 697
 698         int (*open)(struct hid_device *hdev);
 699         void (*close)(struct hid_device *hdev);
 700
 701         int (*power)(struct hid_device *hdev, int level);
 702
 703         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 704                         unsigned int code, int value);
 705
 706         int (*parse)(struct hid_device *hdev);
 707 };
 708
 709 #define PM_HINT_FULLON  1<<5
 710 #define PM_HINT_NORMAL  1<<1
 711
 712 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 713 /* We ignore a few input applications that are not widely used */
 714 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 715
 716 /* HID core API */
 717
 718 extern int hid_debug;
 719
 720 extern int hid_add_device(struct hid_device *);
 721 extern void hid_destroy_device(struct hid_device *);
 722
 723 extern int __must_check __hid_register_driver(struct hid_driver *,
 724                 struct module *, const char *mod_name);
 725
 726 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 727 #define hid_register_driver(driver) \
 728         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 729
 730 extern void hid_unregister_driver(struct hid_driver *);
 731
 732 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 733 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 734 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 735 extern void hidinput_disconnect(struct hid_device *);
 736
 737 int hid_set_field(struct hid_field *, unsigned, __s32);
 738 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 739 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 740 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 741 unsigned int hidinput_count_leds(struct hid_device *hid);
 742 void hid_output_report(struct hid_report *report, __u8 *data);
 743 struct hid_device *hid_allocate_device(void);
 744 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 745 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 746 int hid_open_report(struct hid_device *device);
 747 int hid_check_keys_pressed(struct hid_device *hid);
 748 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 749 void hid_disconnect(struct hid_device *hid);
 750 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 751                                          const struct hid_device_id *id);
 752
 753 /**
 754  * hid_map_usage - map usage input bits
 755  *
 756  * @hidinput: hidinput which we are interested in
 757  * @usage: usage to fill in
 758  * @bit: pointer to input->{}bit (out parameter)
 759  * @max: maximal valid usage->code to consider later (out parameter)
 760  * @type: input event type (EV_KEY, EV_REL, ...)
 761  * @c: code which corresponds to this usage and type
 762  */
 763 static inline void hid_map_usage(struct hid_input *hidinput,
 764                 struct hid_usage *usage, unsigned long **bit, int *max,
 765                 __u8 type, __u16 c)
 766 {
 767         struct input_dev *input = hidinput->input;
 768
 769         usage->type = type;
 770         usage->code = c;
 771
 772         switch (type) {
 773         case EV_ABS:
 774                 *bit = input->absbit;
 775                 *max = ABS_MAX;
 776                 break;
 777         case EV_REL:
 778                 *bit = input->relbit;
 779                 *max = REL_MAX;
 780                 break;
 781         case EV_KEY:
 782                 *bit = input->keybit;
 783                 *max = KEY_MAX;
 784                 break;
 785         case EV_LED:
 786                 *bit = input->ledbit;
 787                 *max = LED_MAX;
 788                 break;
 789         }
 790 }
 791
 792 /**
 793  * hid_map_usage_clear - map usage input bits and clear the input bit
 794  *
 795  * The same as hid_map_usage, except the @c bit is also cleared in supported
 796  * bits (@bit).
 797  */
 798 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 799                 struct hid_usage *usage, unsigned long **bit, int *max,
 800                 __u8 type, __u16 c)
 801 {
 802         hid_map_usage(hidinput, usage, bit, max, type, c);
 803         clear_bit(c, *bit);
 804 }
 805
 806 /**
 807  * hid_parse - parse HW reports
 808  *
 809  * @hdev: hid device
 810  *
 811  * Call this from probe after you set up the device (if needed). Your
 812  * report_fixup will be called (if non-NULL) after reading raw report from
 813  * device before passing it to hid layer for real parsing.
 814  */
 815 static inline int __must_check hid_parse(struct hid_device *hdev)
 816 {
 817         return hid_open_report(hdev);
 818 }
 819
 820 /**
 821  * hid_hw_start - start underlaying HW
 822  *
 823  * @hdev: hid device
 824  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 825  *
 826  * Call this in probe function *after* hid_parse. This will setup HW buffers
 827  * and start the device (if not deffered to device open). hid_hw_stop must be
 828  * called if this was successful.
 829  */
 830 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 831                 unsigned int connect_mask)
 832 {
 833         int ret = hdev->ll_driver->start(hdev);
 834         if (ret || !connect_mask)
 835                 return ret;
 836         ret = hid_connect(hdev, connect_mask);
 837         if (ret)
 838                 hdev->ll_driver->stop(hdev);
 839         return ret;
 840 }
 841
 842 /**
 843  * hid_hw_stop - stop underlaying HW
 844  *
 845  * @hdev: hid device
 846  *
 847  * This is usually called from remove function or from probe when something
 848  * failed and hid_hw_start was called already.
 849  */
 850 static inline void hid_hw_stop(struct hid_device *hdev)
 851 {
 852         hid_disconnect(hdev);
 853         hdev->ll_driver->stop(hdev);
 854 }
 855
 856 /**
 857  * hid_hw_open - signal underlaying HW to start delivering events
 858  *
 859  * @hdev: hid device
 860  *
 861  * Tell underlying HW to start delivering events from the device.
 862  * This function should be called sometime after successful call
 863  * to hid_hiw_start().
 864  */
 865 static inline int __must_check hid_hw_open(struct hid_device *hdev)
 866 {
 867         return hdev->ll_driver->open(hdev);
 868 }
 869
 870 /**
 871  * hid_hw_close - signal underlaying HW to stop delivering events
 872  *
 873  * @hdev: hid device
 874  *
 875  * This function indicates that we are not interested in the events
 876  * from this device anymore. Delivery of events may or may not stop,
 877  * depending on the number of users still outstanding.
 878  */
 879 static inline void hid_hw_close(struct hid_device *hdev)
 880 {
 881         hdev->ll_driver->close(hdev);
 882 }
 883
 884 /**
 885  * hid_hw_power - requests underlying HW to go into given power mode
 886  *
 887  * @hdev: hid device
 888  * @level: requested power level (one of %PM_HINT_* defines)
 889  *
 890  * This function requests underlying hardware to enter requested power
 891  * mode.
 892  */
 893
 894 static inline int hid_hw_power(struct hid_device *hdev, int level)
 895 {
 896         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 897 }
 898
 899 void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 900                 int interrupt);
 901
 902 extern int hid_generic_init(void);
 903 extern void hid_generic_exit(void);
 904
 905 /* HID quirks API */
 906 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 907 int usbhid_quirks_init(char **quirks_param);
 908 void usbhid_quirks_exit(void);
 909 void usbhid_set_leds(struct hid_device *hid);
 910
 911 #ifdef CONFIG_HID_PID
 912 int hid_pidff_init(struct hid_device *hid);
 913 #else
 914 #define hid_pidff_init NULL
 915 #endif
 916
 917 #define dbg_hid(format, arg...)                                         \
 918 do {                                                                    \
 919         if (hid_debug)                                                  \
 920                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
 921 } while (0)
 922
 923 #define hid_printk(level, hid, fmt, arg...)             \
 924         dev_printk(level, &(hid)->dev, fmt, ##arg)
 925 #define hid_emerg(hid, fmt, arg...)                     \
 926         dev_emerg(&(hid)->dev, fmt, ##arg)
 927 #define hid_crit(hid, fmt, arg...)                      \
 928         dev_crit(&(hid)->dev, fmt, ##arg)
 929 #define hid_alert(hid, fmt, arg...)                     \
 930         dev_alert(&(hid)->dev, fmt, ##arg)
 931 #define hid_err(hid, fmt, arg...)                       \
 932         dev_err(&(hid)->dev, fmt, ##arg)
 933 #define hid_notice(hid, fmt, arg...)                    \
 934         dev_notice(&(hid)->dev, fmt, ##arg)
 935 #define hid_warn(hid, fmt, arg...)                      \
 936         dev_warn(&(hid)->dev, fmt, ##arg)
 937 #define hid_info(hid, fmt, arg...)                      \
 938         dev_info(&(hid)->dev, fmt, ##arg)
 939 #define hid_dbg(hid, fmt, arg...)                       \
 940         dev_dbg(&(hid)->dev, fmt, ##arg)
 941
 942 #endif /* __KERNEL__ */
 943
 944 #endif
 945