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