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_HPVENDOR2        0xff010000
 204 #define HID_UP_MSVENDOR         0xff000000
 205 #define HID_UP_CUSTOM           0x00ff0000
 206 #define HID_UP_LOGIVENDOR       0xffbc0000
 207
 208 #define HID_USAGE               0x0000ffff
 209
 210 #define HID_GD_POINTER          0x00010001
 211 #define HID_GD_MOUSE            0x00010002
 212 #define HID_GD_JOYSTICK         0x00010004
 213 #define HID_GD_GAMEPAD          0x00010005
 214 #define HID_GD_KEYBOARD         0x00010006
 215 #define HID_GD_KEYPAD           0x00010007
 216 #define HID_GD_MULTIAXIS        0x00010008
 217 #define HID_GD_X                0x00010030
 218 #define HID_GD_Y                0x00010031
 219 #define HID_GD_Z                0x00010032
 220 #define HID_GD_RX               0x00010033
 221 #define HID_GD_RY               0x00010034
 222 #define HID_GD_RZ               0x00010035
 223 #define HID_GD_SLIDER           0x00010036
 224 #define HID_GD_DIAL             0x00010037
 225 #define HID_GD_WHEEL            0x00010038
 226 #define HID_GD_HATSWITCH        0x00010039
 227 #define HID_GD_BUFFER           0x0001003a
 228 #define HID_GD_BYTECOUNT        0x0001003b
 229 #define HID_GD_MOTION           0x0001003c
 230 #define HID_GD_START            0x0001003d
 231 #define HID_GD_SELECT           0x0001003e
 232 #define HID_GD_VX               0x00010040
 233 #define HID_GD_VY               0x00010041
 234 #define HID_GD_VZ               0x00010042
 235 #define HID_GD_VBRX             0x00010043
 236 #define HID_GD_VBRY             0x00010044
 237 #define HID_GD_VBRZ             0x00010045
 238 #define HID_GD_VNO              0x00010046
 239 #define HID_GD_FEATURE          0x00010047
 240 #define HID_GD_UP               0x00010090
 241 #define HID_GD_DOWN             0x00010091
 242 #define HID_GD_RIGHT            0x00010092
 243 #define HID_GD_LEFT             0x00010093
 244
 245 #define HID_DC_BATTERYSTRENGTH  0x00060020
 246
 247 #define HID_DG_DIGITIZER        0x000d0001
 248 #define HID_DG_PEN              0x000d0002
 249 #define HID_DG_LIGHTPEN         0x000d0003
 250 #define HID_DG_TOUCHSCREEN      0x000d0004
 251 #define HID_DG_TOUCHPAD         0x000d0005
 252 #define HID_DG_STYLUS           0x000d0020
 253 #define HID_DG_PUCK             0x000d0021
 254 #define HID_DG_FINGER           0x000d0022
 255 #define HID_DG_TIPPRESSURE      0x000d0030
 256 #define HID_DG_BARRELPRESSURE   0x000d0031
 257 #define HID_DG_INRANGE          0x000d0032
 258 #define HID_DG_TOUCH            0x000d0033
 259 #define HID_DG_UNTOUCH          0x000d0034
 260 #define HID_DG_TAP              0x000d0035
 261 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 262 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 263 #define HID_DG_INVERT           0x000d003c
 264 #define HID_DG_TIPSWITCH        0x000d0042
 265 #define HID_DG_TIPSWITCH2       0x000d0043
 266 #define HID_DG_BARRELSWITCH     0x000d0044
 267 #define HID_DG_ERASER           0x000d0045
 268 #define HID_DG_TABLETPICK       0x000d0046
 269 /*
 270  * as of May 20, 2009 the usages below are not yet in the official USB spec
 271  * but are being pushed by Microsft as described in their paper "Digitizer
 272  * Drivers for Windows Touch and Pen-Based Computers"
 273  */
 274 #define HID_DG_CONFIDENCE       0x000d0047
 275 #define HID_DG_WIDTH            0x000d0048
 276 #define HID_DG_HEIGHT           0x000d0049
 277 #define HID_DG_CONTACTID        0x000d0051
 278 #define HID_DG_INPUTMODE        0x000d0052
 279 #define HID_DG_DEVICEINDEX      0x000d0053
 280 #define HID_DG_CONTACTCOUNT     0x000d0054
 281 #define HID_DG_CONTACTMAX       0x000d0055
 282
 283 /*
 284  * HID report types --- Ouch! HID spec says 1 2 3!
 285  */
 286
 287 #define HID_INPUT_REPORT        0
 288 #define HID_OUTPUT_REPORT       1
 289 #define HID_FEATURE_REPORT      2
 290
 291 /*
 292  * HID connect requests
 293  */
 294
 295 #define HID_CONNECT_HIDINPUT            0x01
 296 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 297 #define HID_CONNECT_HIDRAW              0x04
 298 #define HID_CONNECT_HIDDEV              0x08
 299 #define HID_CONNECT_HIDDEV_FORCE        0x10
 300 #define HID_CONNECT_FF                  0x20
 301 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 302                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 303
 304 /*
 305  * HID device quirks.
 306  */
 307
 308 /*
 309  * Increase this if you need to configure more HID quirks at module load time
 310  */
 311 #define MAX_USBHID_BOOT_QUIRKS 4
 312
 313 #define HID_QUIRK_INVERT                        0x00000001
 314 #define HID_QUIRK_NOTOUCH                       0x00000002
 315 #define HID_QUIRK_IGNORE                        0x00000004
 316 #define HID_QUIRK_NOGET                         0x00000008
 317 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 318 #define HID_QUIRK_BADPAD                        0x00000020
 319 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 320 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 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 #define HID_GROUP_MULTITOUCH                    0x0002
 332
 333 /*
 334  * This is the global environment of the parser. This information is
 335  * persistent for main-items. The global environment can be saved and
 336  * restored with PUSH/POP statements.
 337  */
 338
 339 struct hid_global {
 340         unsigned usage_page;
 341         __s32    logical_minimum;
 342         __s32    logical_maximum;
 343         __s32    physical_minimum;
 344         __s32    physical_maximum;
 345         __s32    unit_exponent;
 346         unsigned unit;
 347         unsigned report_id;
 348         unsigned report_size;
 349         unsigned report_count;
 350 };
 351
 352 /*
 353  * This is the local environment. It is persistent up the next main-item.
 354  */
 355
 356 #define HID_MAX_USAGES                  12288
 357 #define HID_DEFAULT_NUM_COLLECTIONS     16
 358
 359 struct hid_local {
 360         unsigned usage[HID_MAX_USAGES]; /* usage array */
 361         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 362         unsigned usage_index;
 363         unsigned usage_minimum;
 364         unsigned delimiter_depth;
 365         unsigned delimiter_branch;
 366 };
 367
 368 /*
 369  * This is the collection stack. We climb up the stack to determine
 370  * application and function of each field.
 371  */
 372
 373 struct hid_collection {
 374         unsigned type;
 375         unsigned usage;
 376         unsigned level;
 377 };
 378
 379 struct hid_usage {
 380         unsigned  hid;                  /* hid usage code */
 381         unsigned  collection_index;     /* index into collection array */
 382         /* hidinput data */
 383         __u16     code;                 /* input driver code */
 384         __u8      type;                 /* input driver type */
 385         __s8      hat_min;              /* hat switch fun */
 386         __s8      hat_max;              /* ditto */
 387         __s8      hat_dir;              /* ditto */
 388 };
 389
 390 struct hid_input;
 391
 392 struct hid_field {
 393         unsigned  physical;             /* physical usage for this field */
 394         unsigned  logical;              /* logical usage for this field */
 395         unsigned  application;          /* application usage for this field */
 396         struct hid_usage *usage;        /* usage table for this function */
 397         unsigned  maxusage;             /* maximum usage index */
 398         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 399         unsigned  report_offset;        /* bit offset in the report */
 400         unsigned  report_size;          /* size of this field in the report */
 401         unsigned  report_count;         /* number of this field in the report */
 402         unsigned  report_type;          /* (input,output,feature) */
 403         __s32    *value;                /* last known value(s) */
 404         __s32     logical_minimum;
 405         __s32     logical_maximum;
 406         __s32     physical_minimum;
 407         __s32     physical_maximum;
 408         __s32     unit_exponent;
 409         unsigned  unit;
 410         struct hid_report *report;      /* associated report */
 411         unsigned index;                 /* index into report->field[] */
 412         /* hidinput data */
 413         struct hid_input *hidinput;     /* associated input structure */
 414         __u16 dpad;                     /* dpad input code */
 415 };
 416
 417 #define HID_MAX_FIELDS 128
 418
 419 struct hid_report {
 420         struct list_head list;
 421         unsigned id;                                    /* id of this report */
 422         unsigned type;                                  /* report type */
 423         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 424         unsigned maxfield;                              /* maximum valid field index */
 425         unsigned size;                                  /* size of the report (bits) */
 426         struct hid_device *device;                      /* associated device */
 427 };
 428
 429 struct hid_report_enum {
 430         unsigned numbered;
 431         struct list_head report_list;
 432         struct hid_report *report_id_hash[256];
 433 };
 434
 435 #define HID_REPORT_TYPES 3
 436
 437 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 438 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 439 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 440 #define HID_OUTPUT_FIFO_SIZE    64
 441
 442 struct hid_control_fifo {
 443         unsigned char dir;
 444         struct hid_report *report;
 445         char *raw_report;
 446 };
 447
 448 struct hid_output_fifo {
 449         struct hid_report *report;
 450         char *raw_report;
 451 };
 452
 453 #define HID_CLAIMED_INPUT       1
 454 #define HID_CLAIMED_HIDDEV      2
 455 #define HID_CLAIMED_HIDRAW      4
 456
 457 #define HID_STAT_ADDED          1
 458 #define HID_STAT_PARSED         2
 459
 460 struct hid_input {
 461         struct list_head list;
 462         struct hid_report *report;
 463         struct input_dev *input;
 464 };
 465
 466 enum hid_type {
 467         HID_TYPE_OTHER = 0,
 468         HID_TYPE_USBMOUSE,
 469         HID_TYPE_USBNONE
 470 };
 471
 472 struct hid_driver;
 473 struct hid_ll_driver;
 474
 475 struct hid_device {                                                     /* device report descriptor */
 476         __u8 *dev_rdesc;
 477         unsigned dev_rsize;
 478         __u8 *rdesc;
 479         unsigned rsize;
 480         struct hid_collection *collection;                              /* List of HID collections */
 481         unsigned collection_size;                                       /* Number of allocated hid_collections */
 482         unsigned maxcollection;                                         /* Number of parsed collections */
 483         unsigned maxapplication;                                        /* Number of applications */
 484         __u16 bus;                                                      /* BUS ID */
 485         __u16 group;                                                    /* Report group */
 486         __u32 vendor;                                                   /* Vendor ID */
 487         __u32 product;                                                  /* Product ID */
 488         __u32 version;                                                  /* HID version */
 489         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 490         unsigned country;                                               /* HID country */
 491         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 492
 493         struct semaphore driver_lock;                                   /* protects the current driver */
 494         struct device dev;                                              /* device */
 495         struct hid_driver *driver;
 496         struct hid_ll_driver *ll_driver;
 497
 498 #ifdef CONFIG_HID_BATTERY_STRENGTH
 499         /*
 500          * Power supply information for HID devices which report
 501          * battery strength. power_supply is registered iff
 502          * battery.name is non-NULL.
 503          */
 504         struct power_supply battery;
 505         __s32 battery_min;
 506         __s32 battery_max;
 507         __s32 battery_report_type;
 508         __s32 battery_report_id;
 509 #endif
 510
 511         unsigned int status;                                            /* see STAT flags above */
 512         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 513         unsigned quirks;                                                /* Various quirks the device can pull on us */
 514
 515         struct list_head inputs;                                        /* The list of inputs */
 516         void *hiddev;                                                   /* The hiddev structure */
 517         void *hidraw;
 518         int minor;                                                      /* Hiddev minor number */
 519
 520         int open;                                                       /* is the device open by anyone? */
 521         char name[128];                                                 /* Device name */
 522         char phys[64];                                                  /* Device physical location */
 523         char uniq[64];                                                  /* Device unique identifier (serial #) */
 524
 525         void *driver_data;
 526
 527         /* temporary hid_ff handling (until moved to the drivers) */
 528         int (*ff_init)(struct hid_device *);
 529
 530         /* hiddev event handler */
 531         int (*hiddev_connect)(struct hid_device *, unsigned int);
 532         void (*hiddev_disconnect)(struct hid_device *);
 533         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 534                                   struct hid_usage *, __s32);
 535         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 536
 537         /* handler for raw input (Get_Report) data, used by hidraw */
 538         int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
 539
 540         /* handler for raw output data, used by hidraw */
 541         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 542
 543         /* debugging support via debugfs */
 544         unsigned short debug;
 545         struct dentry *debug_dir;
 546         struct dentry *debug_rdesc;
 547         struct dentry *debug_events;
 548         struct list_head debug_list;
 549         wait_queue_head_t debug_wait;
 550 };
 551
 552 static inline void *hid_get_drvdata(struct hid_device *hdev)
 553 {
 554         return dev_get_drvdata(&hdev->dev);
 555 }
 556
 557 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 558 {
 559         dev_set_drvdata(&hdev->dev, data);
 560 }
 561
 562 #define HID_GLOBAL_STACK_SIZE 4
 563 #define HID_COLLECTION_STACK_SIZE 4
 564
 565 struct hid_parser {
 566         struct hid_global     global;
 567         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 568         unsigned              global_stack_ptr;
 569         struct hid_local      local;
 570         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 571         unsigned              collection_stack_ptr;
 572         struct hid_device    *device;
 573 };
 574
 575 struct hid_class_descriptor {
 576         __u8  bDescriptorType;
 577         __le16 wDescriptorLength;
 578 } __attribute__ ((packed));
 579
 580 struct hid_descriptor {
 581         __u8  bLength;
 582         __u8  bDescriptorType;
 583         __le16 bcdHID;
 584         __u8  bCountryCode;
 585         __u8  bNumDescriptors;
 586
 587         struct hid_class_descriptor desc[1];
 588 } __attribute__ ((packed));
 589
 590 #define HID_DEVICE(b, g, ven, prod)                                     \
 591         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 592 #define HID_USB_DEVICE(ven, prod)                               \
 593         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 594 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 595         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 596
 597 #define HID_REPORT_ID(rep) \
 598         .report_type = (rep)
 599 #define HID_USAGE_ID(uhid, utype, ucode) \
 600         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 601 /* we don't want to catch types and codes equal to 0 */
 602 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 603
 604 struct hid_report_id {
 605         __u32 report_type;
 606 };
 607 struct hid_usage_id {
 608         __u32 usage_hid;
 609         __u32 usage_type;
 610         __u32 usage_code;
 611 };
 612
 613 /**
 614  * struct hid_driver
 615  * @name: driver name (e.g. "Footech_bar-wheel")
 616  * @id_table: which devices is this driver for (must be non-NULL for probe
 617  *            to be called)
 618  * @dyn_list: list of dynamically added device ids
 619  * @dyn_lock: lock protecting @dyn_list
 620  * @probe: new device inserted
 621  * @remove: device removed (NULL if not a hot-plug capable driver)
 622  * @report_table: on which reports to call raw_event (NULL means all)
 623  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 624  * @usage_table: on which events to call event (NULL means all)
 625  * @event: if usage in usage_table, this hook is called (NULL means nop)
 626  * @report_fixup: called before report descriptor parsing (NULL means nop)
 627  * @input_mapping: invoked on input registering before mapping an usage
 628  * @input_mapped: invoked on input registering after mapping an usage
 629  * @feature_mapping: invoked on feature registering
 630  * @suspend: invoked on suspend (NULL means nop)
 631  * @resume: invoked on resume if device was not reset (NULL means nop)
 632  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 633  *
 634  * raw_event and event should return 0 on no action performed, 1 when no
 635  * further processing should be done and negative on error
 636  *
 637  * input_mapping shall return a negative value to completely ignore this usage
 638  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 639  * usage by generic code (no special handling needed) or positive to skip
 640  * generic parsing (needed special handling which was done in the hook already)
 641  * input_mapped shall return negative to inform the layer that this usage
 642  * should not be considered for further processing or zero to notify that
 643  * no processing was performed and should be done in a generic manner
 644  * Both these functions may be NULL which means the same behavior as returning
 645  * zero from them.
 646  */
 647 struct hid_driver {
 648         char *name;
 649         const struct hid_device_id *id_table;
 650
 651         struct list_head dyn_list;
 652         spinlock_t dyn_lock;
 653
 654         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 655         void (*remove)(struct hid_device *dev);
 656
 657         const struct hid_report_id *report_table;
 658         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 659                         u8 *data, int size);
 660         const struct hid_usage_id *usage_table;
 661         int (*event)(struct hid_device *hdev, struct hid_field *field,
 662                         struct hid_usage *usage, __s32 value);
 663
 664         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 665                         unsigned int *size);
 666
 667         int (*input_mapping)(struct hid_device *hdev,
 668                         struct hid_input *hidinput, struct hid_field *field,
 669                         struct hid_usage *usage, unsigned long **bit, int *max);
 670         int (*input_mapped)(struct hid_device *hdev,
 671                         struct hid_input *hidinput, struct hid_field *field,
 672                         struct hid_usage *usage, unsigned long **bit, int *max);
 673         void (*feature_mapping)(struct hid_device *hdev,
 674                         struct hid_field *field,
 675                         struct hid_usage *usage);
 676 #ifdef CONFIG_PM
 677         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 678         int (*resume)(struct hid_device *hdev);
 679         int (*reset_resume)(struct hid_device *hdev);
 680 #endif
 681 /* private: */
 682         struct device_driver driver;
 683 };
 684
 685 /**
 686  * hid_ll_driver - low level driver callbacks
 687  * @start: called on probe to start the device
 688  * @stop: called on remove
 689  * @open: called by input layer on open
 690  * @close: called by input layer on close
 691  * @hidinput_input_event: event input event (e.g. ff or leds)
 692  * @parse: this method is called only once to parse the device data,
 693  *         shouldn't allocate anything to not leak memory
 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 (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 705                         unsigned int code, int value);
 706
 707         int (*parse)(struct hid_device *hdev);
 708 };
 709
 710 #define PM_HINT_FULLON  1<<5
 711 #define PM_HINT_NORMAL  1<<1
 712
 713 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 714 /* We ignore a few input applications that are not widely used */
 715 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 716
 717 /* HID core API */
 718
 719 extern int hid_debug;
 720
 721 extern int hid_add_device(struct hid_device *);
 722 extern void hid_destroy_device(struct hid_device *);
 723
 724 extern int __must_check __hid_register_driver(struct hid_driver *,
 725                 struct module *, const char *mod_name);
 726
 727 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 728 #define hid_register_driver(driver) \
 729         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 730
 731 extern void hid_unregister_driver(struct hid_driver *);
 732
 733 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 734 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 735 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 736 extern void hidinput_disconnect(struct hid_device *);
 737
 738 int hid_set_field(struct hid_field *, unsigned, __s32);
 739 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 740 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 741 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 742 unsigned int hidinput_count_leds(struct hid_device *hid);
 743 void hid_output_report(struct hid_report *report, __u8 *data);
 744 struct hid_device *hid_allocate_device(void);
 745 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 746 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 747 int hid_open_report(struct hid_device *device);
 748 int hid_check_keys_pressed(struct hid_device *hid);
 749 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 750 void hid_disconnect(struct hid_device *hid);
 751 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 752                                          const struct hid_device_id *id);
 753
 754 /**
 755  * hid_map_usage - map usage input bits
 756  *
 757  * @hidinput: hidinput which we are interested in
 758  * @usage: usage to fill in
 759  * @bit: pointer to input->{}bit (out parameter)
 760  * @max: maximal valid usage->code to consider later (out parameter)
 761  * @type: input event type (EV_KEY, EV_REL, ...)
 762  * @c: code which corresponds to this usage and type
 763  */
 764 static inline void hid_map_usage(struct hid_input *hidinput,
 765                 struct hid_usage *usage, unsigned long **bit, int *max,
 766                 __u8 type, __u16 c)
 767 {
 768         struct input_dev *input = hidinput->input;
 769
 770         usage->type = type;
 771         usage->code = c;
 772
 773         switch (type) {
 774         case EV_ABS:
 775                 *bit = input->absbit;
 776                 *max = ABS_MAX;
 777                 break;
 778         case EV_REL:
 779                 *bit = input->relbit;
 780                 *max = REL_MAX;
 781                 break;
 782         case EV_KEY:
 783                 *bit = input->keybit;
 784                 *max = KEY_MAX;
 785                 break;
 786         case EV_LED:
 787                 *bit = input->ledbit;
 788                 *max = LED_MAX;
 789                 break;
 790         }
 791 }
 792
 793 /**
 794  * hid_map_usage_clear - map usage input bits and clear the input bit
 795  *
 796  * The same as hid_map_usage, except the @c bit is also cleared in supported
 797  * bits (@bit).
 798  */
 799 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 800                 struct hid_usage *usage, unsigned long **bit, int *max,
 801                 __u8 type, __u16 c)
 802 {
 803         hid_map_usage(hidinput, usage, bit, max, type, c);
 804         clear_bit(c, *bit);
 805 }
 806
 807 /**
 808  * hid_parse - parse HW reports
 809  *
 810  * @hdev: hid device
 811  *
 812  * Call this from probe after you set up the device (if needed). Your
 813  * report_fixup will be called (if non-NULL) after reading raw report from
 814  * device before passing it to hid layer for real parsing.
 815  */
 816 static inline int __must_check hid_parse(struct hid_device *hdev)
 817 {
 818         return hid_open_report(hdev);
 819 }
 820
 821 /**
 822  * hid_hw_start - start underlaying HW
 823  *
 824  * @hdev: hid device
 825  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 826  *
 827  * Call this in probe function *after* hid_parse. This will setup HW buffers
 828  * and start the device (if not deffered to device open). hid_hw_stop must be
 829  * called if this was successful.
 830  */
 831 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 832                 unsigned int connect_mask)
 833 {
 834         int ret = hdev->ll_driver->start(hdev);
 835         if (ret || !connect_mask)
 836                 return ret;
 837         ret = hid_connect(hdev, connect_mask);
 838         if (ret)
 839                 hdev->ll_driver->stop(hdev);
 840         return ret;
 841 }
 842
 843 /**
 844  * hid_hw_stop - stop underlaying HW
 845  *
 846  * @hdev: hid device
 847  *
 848  * This is usually called from remove function or from probe when something
 849  * failed and hid_hw_start was called already.
 850  */
 851 static inline void hid_hw_stop(struct hid_device *hdev)
 852 {
 853         hid_disconnect(hdev);
 854         hdev->ll_driver->stop(hdev);
 855 }
 856
 857 /**
 858  * hid_hw_open - signal underlaying HW to start delivering events
 859  *
 860  * @hdev: hid device
 861  *
 862  * Tell underlying HW to start delivering events from the device.
 863  * This function should be called sometime after successful call
 864  * to hid_hiw_start().
 865  */
 866 static inline int __must_check hid_hw_open(struct hid_device *hdev)
 867 {
 868         return hdev->ll_driver->open(hdev);
 869 }
 870
 871 /**
 872  * hid_hw_close - signal underlaying HW to stop delivering events
 873  *
 874  * @hdev: hid device
 875  *
 876  * This function indicates that we are not interested in the events
 877  * from this device anymore. Delivery of events may or may not stop,
 878  * depending on the number of users still outstanding.
 879  */
 880 static inline void hid_hw_close(struct hid_device *hdev)
 881 {
 882         hdev->ll_driver->close(hdev);
 883 }
 884
 885 /**
 886  * hid_hw_power - requests underlying HW to go into given power mode
 887  *
 888  * @hdev: hid device
 889  * @level: requested power level (one of %PM_HINT_* defines)
 890  *
 891  * This function requests underlying hardware to enter requested power
 892  * mode.
 893  */
 894
 895 static inline int hid_hw_power(struct hid_device *hdev, int level)
 896 {
 897         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 898 }
 899
 900 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 901                 int interrupt);
 902
 903 extern int hid_generic_init(void);
 904 extern void hid_generic_exit(void);
 905
 906 /* HID quirks API */
 907 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 908 int usbhid_quirks_init(char **quirks_param);
 909 void usbhid_quirks_exit(void);
 910 void usbhid_set_leds(struct hid_device *hid);
 911
 912 #ifdef CONFIG_HID_PID
 913 int hid_pidff_init(struct hid_device *hid);
 914 #else
 915 #define hid_pidff_init NULL
 916 #endif
 917
 918 #define dbg_hid(format, arg...)                                         \
 919 do {                                                                    \
 920         if (hid_debug)                                                  \
 921                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
 922 } while (0)
 923
 924 #define hid_printk(level, hid, fmt, arg...)             \
 925         dev_printk(level, &(hid)->dev, fmt, ##arg)
 926 #define hid_emerg(hid, fmt, arg...)                     \
 927         dev_emerg(&(hid)->dev, fmt, ##arg)
 928 #define hid_crit(hid, fmt, arg...)                      \
 929         dev_crit(&(hid)->dev, fmt, ##arg)
 930 #define hid_alert(hid, fmt, arg...)                     \
 931         dev_alert(&(hid)->dev, fmt, ##arg)
 932 #define hid_err(hid, fmt, arg...)                       \
 933         dev_err(&(hid)->dev, fmt, ##arg)
 934 #define hid_notice(hid, fmt, arg...)                    \
 935         dev_notice(&(hid)->dev, fmt, ##arg)
 936 #define hid_warn(hid, fmt, arg...)                      \
 937         dev_warn(&(hid)->dev, fmt, ##arg)
 938 #define hid_info(hid, fmt, arg...)                      \
 939         dev_info(&(hid)->dev, fmt, ##arg)
 940 #define hid_dbg(hid, fmt, arg...)                       \
 941         dev_dbg(&(hid)->dev, fmt, ##arg)
 942
 943 #endif /* __KERNEL__ */
 944
 945 #endif
 946