include/linux/hid.h

   1 /*
   2  *  Copyright (c) 1999 Andreas Gal
   3  *  Copyright (c) 2000-2001 Vojtech Pavlik
   4  *  Copyright (c) 2006-2007 Jiri Kosina
   5  */
   6 /*
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  *
  21  * Should you need to contact me, the author, you can do so either by
  22  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  23  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  24  */
  25 #ifndef __HID_H
  26 #define __HID_H
  27
  28
  29 #include <linux/types.h>
  30 #include <linux/slab.h>
  31 #include <linux/list.h>
  32 #include <linux/mod_devicetable.h> /* hid_device_id */
  33 #include <linux/timer.h>
  34 #include <linux/workqueue.h>
  35 #include <linux/input.h>
  36 #include <linux/semaphore.h>
  37 #include <linux/power_supply.h>
  38 #include <uapi/linux/hid.h>
  39
  40 /*
  41  * We parse each description item into this structure. Short items data
  42  * values are expanded to 32-bit signed int, long items contain a pointer
  43  * into the data area.
  44  */
  45
  46 struct hid_item {
  47         unsigned  format;
  48         __u8      size;
  49         __u8      type;
  50         __u8      tag;
  51         union {
  52             __u8   u8;
  53             __s8   s8;
  54             __u16  u16;
  55             __s16  s16;
  56             __u32  u32;
  57             __s32  s32;
  58             __u8  *longdata;
  59         } data;
  60 };
  61
  62 /*
  63  * HID report item format
  64  */
  65
  66 #define HID_ITEM_FORMAT_SHORT   0
  67 #define HID_ITEM_FORMAT_LONG    1
  68
  69 /*
  70  * Special tag indicating long items
  71  */
  72
  73 #define HID_ITEM_TAG_LONG       15
  74
  75 /*
  76  * HID report descriptor item type (prefix bit 2,3)
  77  */
  78
  79 #define HID_ITEM_TYPE_MAIN              0
  80 #define HID_ITEM_TYPE_GLOBAL            1
  81 #define HID_ITEM_TYPE_LOCAL             2
  82 #define HID_ITEM_TYPE_RESERVED          3
  83
  84 /*
  85  * HID report descriptor main item tags
  86  */
  87
  88 #define HID_MAIN_ITEM_TAG_INPUT                 8
  89 #define HID_MAIN_ITEM_TAG_OUTPUT                9
  90 #define HID_MAIN_ITEM_TAG_FEATURE               11
  91 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
  92 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
  93
  94 /*
  95  * HID report descriptor main item contents
  96  */
  97
  98 #define HID_MAIN_ITEM_CONSTANT          0x001
  99 #define HID_MAIN_ITEM_VARIABLE          0x002
 100 #define HID_MAIN_ITEM_RELATIVE          0x004
 101 #define HID_MAIN_ITEM_WRAP              0x008
 102 #define HID_MAIN_ITEM_NONLINEAR         0x010
 103 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 104 #define HID_MAIN_ITEM_NULL_STATE        0x040
 105 #define HID_MAIN_ITEM_VOLATILE          0x080
 106 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 107
 108 /*
 109  * HID report descriptor collection item types
 110  */
 111
 112 #define HID_COLLECTION_PHYSICAL         0
 113 #define HID_COLLECTION_APPLICATION      1
 114 #define HID_COLLECTION_LOGICAL          2
 115
 116 /*
 117  * HID report descriptor global item tags
 118  */
 119
 120 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 121 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 122 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 123 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 124 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 125 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 126 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 127 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 128 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 129 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 130 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 131 #define HID_GLOBAL_ITEM_TAG_POP                 11
 132
 133 /*
 134  * HID report descriptor local item tags
 135  */
 136
 137 #define HID_LOCAL_ITEM_TAG_USAGE                0
 138 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 139 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 140 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 141 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 142 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 143 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 144 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 145 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 146 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 147
 148 /*
 149  * HID usage tables
 150  */
 151
 152 #define HID_USAGE_PAGE          0xffff0000
 153
 154 #define HID_UP_UNDEFINED        0x00000000
 155 #define HID_UP_GENDESK          0x00010000
 156 #define HID_UP_SIMULATION       0x00020000
 157 #define HID_UP_GENDEVCTRLS      0x00060000
 158 #define HID_UP_KEYBOARD         0x00070000
 159 #define HID_UP_LED              0x00080000
 160 #define HID_UP_BUTTON           0x00090000
 161 #define HID_UP_ORDINAL          0x000a0000
 162 #define HID_UP_CONSUMER         0x000c0000
 163 #define HID_UP_DIGITIZER        0x000d0000
 164 #define HID_UP_PID              0x000f0000
 165 #define HID_UP_HPVENDOR         0xff7f0000
 166 #define HID_UP_HPVENDOR2        0xff010000
 167 #define HID_UP_MSVENDOR         0xff000000
 168 #define HID_UP_CUSTOM           0x00ff0000
 169 #define HID_UP_LOGIVENDOR       0xffbc0000
 170 #define HID_UP_SENSOR           0x00200000
 171
 172 #define HID_USAGE               0x0000ffff
 173
 174 #define HID_GD_POINTER          0x00010001
 175 #define HID_GD_MOUSE            0x00010002
 176 #define HID_GD_JOYSTICK         0x00010004
 177 #define HID_GD_GAMEPAD          0x00010005
 178 #define HID_GD_KEYBOARD         0x00010006
 179 #define HID_GD_KEYPAD           0x00010007
 180 #define HID_GD_MULTIAXIS        0x00010008
 181 #define HID_GD_X                0x00010030
 182 #define HID_GD_Y                0x00010031
 183 #define HID_GD_Z                0x00010032
 184 #define HID_GD_RX               0x00010033
 185 #define HID_GD_RY               0x00010034
 186 #define HID_GD_RZ               0x00010035
 187 #define HID_GD_SLIDER           0x00010036
 188 #define HID_GD_DIAL             0x00010037
 189 #define HID_GD_WHEEL            0x00010038
 190 #define HID_GD_HATSWITCH        0x00010039
 191 #define HID_GD_BUFFER           0x0001003a
 192 #define HID_GD_BYTECOUNT        0x0001003b
 193 #define HID_GD_MOTION           0x0001003c
 194 #define HID_GD_START            0x0001003d
 195 #define HID_GD_SELECT           0x0001003e
 196 #define HID_GD_VX               0x00010040
 197 #define HID_GD_VY               0x00010041
 198 #define HID_GD_VZ               0x00010042
 199 #define HID_GD_VBRX             0x00010043
 200 #define HID_GD_VBRY             0x00010044
 201 #define HID_GD_VBRZ             0x00010045
 202 #define HID_GD_VNO              0x00010046
 203 #define HID_GD_FEATURE          0x00010047
 204 #define HID_GD_UP               0x00010090
 205 #define HID_GD_DOWN             0x00010091
 206 #define HID_GD_RIGHT            0x00010092
 207 #define HID_GD_LEFT             0x00010093
 208
 209 #define HID_DC_BATTERYSTRENGTH  0x00060020
 210
 211 #define HID_DG_DIGITIZER        0x000d0001
 212 #define HID_DG_PEN              0x000d0002
 213 #define HID_DG_LIGHTPEN         0x000d0003
 214 #define HID_DG_TOUCHSCREEN      0x000d0004
 215 #define HID_DG_TOUCHPAD         0x000d0005
 216 #define HID_DG_STYLUS           0x000d0020
 217 #define HID_DG_PUCK             0x000d0021
 218 #define HID_DG_FINGER           0x000d0022
 219 #define HID_DG_TIPPRESSURE      0x000d0030
 220 #define HID_DG_BARRELPRESSURE   0x000d0031
 221 #define HID_DG_INRANGE          0x000d0032
 222 #define HID_DG_TOUCH            0x000d0033
 223 #define HID_DG_UNTOUCH          0x000d0034
 224 #define HID_DG_TAP              0x000d0035
 225 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
 226 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
 227 #define HID_DG_INVERT           0x000d003c
 228 #define HID_DG_TIPSWITCH        0x000d0042
 229 #define HID_DG_TIPSWITCH2       0x000d0043
 230 #define HID_DG_BARRELSWITCH     0x000d0044
 231 #define HID_DG_ERASER           0x000d0045
 232 #define HID_DG_TABLETPICK       0x000d0046
 233 /*
 234  * as of May 20, 2009 the usages below are not yet in the official USB spec
 235  * but are being pushed by Microsft as described in their paper "Digitizer
 236  * Drivers for Windows Touch and Pen-Based Computers"
 237  */
 238 #define HID_DG_CONFIDENCE       0x000d0047
 239 #define HID_DG_WIDTH            0x000d0048
 240 #define HID_DG_HEIGHT           0x000d0049
 241 #define HID_DG_CONTACTID        0x000d0051
 242 #define HID_DG_INPUTMODE        0x000d0052
 243 #define HID_DG_DEVICEINDEX      0x000d0053
 244 #define HID_DG_CONTACTCOUNT     0x000d0054
 245 #define HID_DG_CONTACTMAX       0x000d0055
 246
 247 /*
 248  * HID report types --- Ouch! HID spec says 1 2 3!
 249  */
 250
 251 #define HID_INPUT_REPORT        0
 252 #define HID_OUTPUT_REPORT       1
 253 #define HID_FEATURE_REPORT      2
 254
 255 /*
 256  * HID connect requests
 257  */
 258
 259 #define HID_CONNECT_HIDINPUT            0x01
 260 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 261 #define HID_CONNECT_HIDRAW              0x04
 262 #define HID_CONNECT_HIDDEV              0x08
 263 #define HID_CONNECT_HIDDEV_FORCE        0x10
 264 #define HID_CONNECT_FF                  0x20
 265 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 266                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 267
 268 /*
 269  * HID device quirks.
 270  */
 271
 272 /*
 273  * Increase this if you need to configure more HID quirks at module load time
 274  */
 275 #define MAX_USBHID_BOOT_QUIRKS 4
 276
 277 #define HID_QUIRK_INVERT                        0x00000001
 278 #define HID_QUIRK_NOTOUCH                       0x00000002
 279 #define HID_QUIRK_IGNORE                        0x00000004
 280 #define HID_QUIRK_NOGET                         0x00000008
 281 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
 282 #define HID_QUIRK_BADPAD                        0x00000020
 283 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 284 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
 285 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
 286 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 287 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 288 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 289 #define HID_QUIRK_NO_IGNORE                     0x40000000
 290 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 291
 292 /*
 293  * HID device groups
 294  */
 295 #define HID_GROUP_GENERIC                       0x0001
 296 #define HID_GROUP_MULTITOUCH                    0x0002
 297 #define HID_GROUP_SENSOR_HUB                    0x0003
 298
 299 /*
 300  * This is the global environment of the parser. This information is
 301  * persistent for main-items. The global environment can be saved and
 302  * restored with PUSH/POP statements.
 303  */
 304
 305 struct hid_global {
 306         unsigned usage_page;
 307         __s32    logical_minimum;
 308         __s32    logical_maximum;
 309         __s32    physical_minimum;
 310         __s32    physical_maximum;
 311         __s32    unit_exponent;
 312         unsigned unit;
 313         unsigned report_id;
 314         unsigned report_size;
 315         unsigned report_count;
 316 };
 317
 318 /*
 319  * This is the local environment. It is persistent up the next main-item.
 320  */
 321
 322 #define HID_MAX_USAGES                  12288
 323 #define HID_DEFAULT_NUM_COLLECTIONS     16
 324
 325 struct hid_local {
 326         unsigned usage[HID_MAX_USAGES]; /* usage array */
 327         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 328         unsigned usage_index;
 329         unsigned usage_minimum;
 330         unsigned delimiter_depth;
 331         unsigned delimiter_branch;
 332 };
 333
 334 /*
 335  * This is the collection stack. We climb up the stack to determine
 336  * application and function of each field.
 337  */
 338
 339 struct hid_collection {
 340         unsigned type;
 341         unsigned usage;
 342         unsigned level;
 343 };
 344
 345 struct hid_usage {
 346         unsigned  hid;                  /* hid usage code */
 347         unsigned  collection_index;     /* index into collection array */
 348         unsigned  usage_index;          /* index into usage array */
 349         /* hidinput data */
 350         __u16     code;                 /* input driver code */
 351         __u8      type;                 /* input driver type */
 352         __s8      hat_min;              /* hat switch fun */
 353         __s8      hat_max;              /* ditto */
 354         __s8      hat_dir;              /* ditto */
 355 };
 356
 357 struct hid_input;
 358
 359 struct hid_field {
 360         unsigned  physical;             /* physical usage for this field */
 361         unsigned  logical;              /* logical usage for this field */
 362         unsigned  application;          /* application usage for this field */
 363         struct hid_usage *usage;        /* usage table for this function */
 364         unsigned  maxusage;             /* maximum usage index */
 365         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 366         unsigned  report_offset;        /* bit offset in the report */
 367         unsigned  report_size;          /* size of this field in the report */
 368         unsigned  report_count;         /* number of this field in the report */
 369         unsigned  report_type;          /* (input,output,feature) */
 370         __s32    *value;                /* last known value(s) */
 371         __s32     logical_minimum;
 372         __s32     logical_maximum;
 373         __s32     physical_minimum;
 374         __s32     physical_maximum;
 375         __s32     unit_exponent;
 376         unsigned  unit;
 377         struct hid_report *report;      /* associated report */
 378         unsigned index;                 /* index into report->field[] */
 379         /* hidinput data */
 380         struct hid_input *hidinput;     /* associated input structure */
 381         __u16 dpad;                     /* dpad input code */
 382 };
 383
 384 #define HID_MAX_FIELDS 256
 385
 386 struct hid_report {
 387         struct list_head list;
 388         unsigned id;                                    /* id of this report */
 389         unsigned type;                                  /* report type */
 390         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 391         unsigned maxfield;                              /* maximum valid field index */
 392         unsigned size;                                  /* size of the report (bits) */
 393         struct hid_device *device;                      /* associated device */
 394 };
 395
 396 struct hid_report_enum {
 397         unsigned numbered;
 398         struct list_head report_list;
 399         struct hid_report *report_id_hash[256];
 400 };
 401
 402 #define HID_REPORT_TYPES 3
 403
 404 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 405 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 406 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 407 #define HID_OUTPUT_FIFO_SIZE    64
 408
 409 struct hid_control_fifo {
 410         unsigned char dir;
 411         struct hid_report *report;
 412         char *raw_report;
 413 };
 414
 415 struct hid_output_fifo {
 416         struct hid_report *report;
 417         char *raw_report;
 418 };
 419
 420 #define HID_CLAIMED_INPUT       1
 421 #define HID_CLAIMED_HIDDEV      2
 422 #define HID_CLAIMED_HIDRAW      4
 423
 424 #define HID_STAT_ADDED          1
 425 #define HID_STAT_PARSED         2
 426
 427 struct hid_input {
 428         struct list_head list;
 429         struct hid_report *report;
 430         struct input_dev *input;
 431 };
 432
 433 enum hid_type {
 434         HID_TYPE_OTHER = 0,
 435         HID_TYPE_USBMOUSE,
 436         HID_TYPE_USBNONE
 437 };
 438
 439 struct hid_driver;
 440 struct hid_ll_driver;
 441
 442 struct hid_device {                                                     /* device report descriptor */
 443         __u8 *dev_rdesc;
 444         unsigned dev_rsize;
 445         __u8 *rdesc;
 446         unsigned rsize;
 447         struct hid_collection *collection;                              /* List of HID collections */
 448         unsigned collection_size;                                       /* Number of allocated hid_collections */
 449         unsigned maxcollection;                                         /* Number of parsed collections */
 450         unsigned maxapplication;                                        /* Number of applications */
 451         __u16 bus;                                                      /* BUS ID */
 452         __u16 group;                                                    /* Report group */
 453         __u32 vendor;                                                   /* Vendor ID */
 454         __u32 product;                                                  /* Product ID */
 455         __u32 version;                                                  /* HID version */
 456         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 457         unsigned country;                                               /* HID country */
 458         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 459
 460         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
 461         struct semaphore driver_input_lock;                             /* protects the current driver */
 462         struct device dev;                                              /* device */
 463         struct hid_driver *driver;
 464         struct hid_ll_driver *ll_driver;
 465
 466 #ifdef CONFIG_HID_BATTERY_STRENGTH
 467         /*
 468          * Power supply information for HID devices which report
 469          * battery strength. power_supply is registered iff
 470          * battery.name is non-NULL.
 471          */
 472         struct power_supply battery;
 473         __s32 battery_min;
 474         __s32 battery_max;
 475         __s32 battery_report_type;
 476         __s32 battery_report_id;
 477 #endif
 478
 479         unsigned int status;                                            /* see STAT flags above */
 480         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 481         unsigned quirks;                                                /* Various quirks the device can pull on us */
 482         bool io_started;                                                /* Protected by driver_lock. If IO has started */
 483
 484         struct list_head inputs;                                        /* The list of inputs */
 485         void *hiddev;                                                   /* The hiddev structure */
 486         void *hidraw;
 487         int minor;                                                      /* Hiddev minor number */
 488
 489         int open;                                                       /* is the device open by anyone? */
 490         char name[128];                                                 /* Device name */
 491         char phys[64];                                                  /* Device physical location */
 492         char uniq[64];                                                  /* Device unique identifier (serial #) */
 493
 494         void *driver_data;
 495
 496         /* temporary hid_ff handling (until moved to the drivers) */
 497         int (*ff_init)(struct hid_device *);
 498
 499         /* hiddev event handler */
 500         int (*hiddev_connect)(struct hid_device *, unsigned int);
 501         void (*hiddev_disconnect)(struct hid_device *);
 502         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 503                                   struct hid_usage *, __s32);
 504         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 505
 506         /* handler for raw input (Get_Report) data, used by hidraw */
 507         int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
 508
 509         /* handler for raw output data, used by hidraw */
 510         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 511
 512         /* debugging support via debugfs */
 513         unsigned short debug;
 514         struct dentry *debug_dir;
 515         struct dentry *debug_rdesc;
 516         struct dentry *debug_events;
 517         struct list_head debug_list;
 518         struct mutex debug_list_lock;
 519         wait_queue_head_t debug_wait;
 520 };
 521
 522 static inline void *hid_get_drvdata(struct hid_device *hdev)
 523 {
 524         return dev_get_drvdata(&hdev->dev);
 525 }
 526
 527 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 528 {
 529         dev_set_drvdata(&hdev->dev, data);
 530 }
 531
 532 #define HID_GLOBAL_STACK_SIZE 4
 533 #define HID_COLLECTION_STACK_SIZE 4
 534
 535 struct hid_parser {
 536         struct hid_global     global;
 537         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 538         unsigned              global_stack_ptr;
 539         struct hid_local      local;
 540         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 541         unsigned              collection_stack_ptr;
 542         struct hid_device    *device;
 543 };
 544
 545 struct hid_class_descriptor {
 546         __u8  bDescriptorType;
 547         __le16 wDescriptorLength;
 548 } __attribute__ ((packed));
 549
 550 struct hid_descriptor {
 551         __u8  bLength;
 552         __u8  bDescriptorType;
 553         __le16 bcdHID;
 554         __u8  bCountryCode;
 555         __u8  bNumDescriptors;
 556
 557         struct hid_class_descriptor desc[1];
 558 } __attribute__ ((packed));
 559
 560 #define HID_DEVICE(b, g, ven, prod)                                     \
 561         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 562 #define HID_USB_DEVICE(ven, prod)                               \
 563         .bus = BUS_USB, .vendor = (ven), .product = (prod)
 564 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 565         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 566
 567 #define HID_REPORT_ID(rep) \
 568         .report_type = (rep)
 569 #define HID_USAGE_ID(uhid, utype, ucode) \
 570         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 571 /* we don't want to catch types and codes equal to 0 */
 572 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 573
 574 struct hid_report_id {
 575         __u32 report_type;
 576 };
 577 struct hid_usage_id {
 578         __u32 usage_hid;
 579         __u32 usage_type;
 580         __u32 usage_code;
 581 };
 582
 583 /**
 584  * struct hid_driver
 585  * @name: driver name (e.g. "Footech_bar-wheel")
 586  * @id_table: which devices is this driver for (must be non-NULL for probe
 587  *            to be called)
 588  * @dyn_list: list of dynamically added device ids
 589  * @dyn_lock: lock protecting @dyn_list
 590  * @probe: new device inserted
 591  * @remove: device removed (NULL if not a hot-plug capable driver)
 592  * @report_table: on which reports to call raw_event (NULL means all)
 593  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 594  * @usage_table: on which events to call event (NULL means all)
 595  * @event: if usage in usage_table, this hook is called (NULL means nop)
 596  * @report: this hook is called after parsing a report (NULL means nop)
 597  * @report_fixup: called before report descriptor parsing (NULL means nop)
 598  * @input_mapping: invoked on input registering before mapping an usage
 599  * @input_mapped: invoked on input registering after mapping an usage
 600  * @input_configured: invoked just before the device is registered
 601  * @feature_mapping: invoked on feature registering
 602  * @suspend: invoked on suspend (NULL means nop)
 603  * @resume: invoked on resume if device was not reset (NULL means nop)
 604  * @reset_resume: invoked on resume if device was reset (NULL means nop)
 605  *
 606  * probe should return -errno on error, or 0 on success. During probe,
 607  * input will not be passed to raw_event unless hid_device_io_start is
 608  * called.
 609  *
 610  * raw_event and event should return 0 on no action performed, 1 when no
 611  * further processing should be done and negative on error
 612  *
 613  * input_mapping shall return a negative value to completely ignore this usage
 614  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 615  * usage by generic code (no special handling needed) or positive to skip
 616  * generic parsing (needed special handling which was done in the hook already)
 617  * input_mapped shall return negative to inform the layer that this usage
 618  * should not be considered for further processing or zero to notify that
 619  * no processing was performed and should be done in a generic manner
 620  * Both these functions may be NULL which means the same behavior as returning
 621  * zero from them.
 622  */
 623 struct hid_driver {
 624         char *name;
 625         const struct hid_device_id *id_table;
 626
 627         struct list_head dyn_list;
 628         spinlock_t dyn_lock;
 629
 630         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 631         void (*remove)(struct hid_device *dev);
 632
 633         const struct hid_report_id *report_table;
 634         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 635                         u8 *data, int size);
 636         const struct hid_usage_id *usage_table;
 637         int (*event)(struct hid_device *hdev, struct hid_field *field,
 638                         struct hid_usage *usage, __s32 value);
 639         void (*report)(struct hid_device *hdev, struct hid_report *report);
 640
 641         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 642                         unsigned int *size);
 643
 644         int (*input_mapping)(struct hid_device *hdev,
 645                         struct hid_input *hidinput, struct hid_field *field,
 646                         struct hid_usage *usage, unsigned long **bit, int *max);
 647         int (*input_mapped)(struct hid_device *hdev,
 648                         struct hid_input *hidinput, struct hid_field *field,
 649                         struct hid_usage *usage, unsigned long **bit, int *max);
 650         void (*input_configured)(struct hid_device *hdev,
 651                                  struct hid_input *hidinput);
 652         void (*feature_mapping)(struct hid_device *hdev,
 653                         struct hid_field *field,
 654                         struct hid_usage *usage);
 655 #ifdef CONFIG_PM
 656         int (*suspend)(struct hid_device *hdev, pm_message_t message);
 657         int (*resume)(struct hid_device *hdev);
 658         int (*reset_resume)(struct hid_device *hdev);
 659 #endif
 660 /* private: */
 661         struct device_driver driver;
 662 };
 663
 664 /**
 665  * hid_ll_driver - low level driver callbacks
 666  * @start: called on probe to start the device
 667  * @stop: called on remove
 668  * @open: called by input layer on open
 669  * @close: called by input layer on close
 670  * @hidinput_input_event: event input event (e.g. ff or leds)
 671  * @parse: this method is called only once to parse the device data,
 672  *         shouldn't allocate anything to not leak memory
 673  * @request: send report request to device (e.g. feature report)
 674  * @wait: wait for buffered io to complete (send/recv reports)
 675  * @idle: send idle request to device
 676  */
 677 struct hid_ll_driver {
 678         int (*start)(struct hid_device *hdev);
 679         void (*stop)(struct hid_device *hdev);
 680
 681         int (*open)(struct hid_device *hdev);
 682         void (*close)(struct hid_device *hdev);
 683
 684         int (*power)(struct hid_device *hdev, int level);
 685
 686         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 687                         unsigned int code, int value);
 688
 689         int (*parse)(struct hid_device *hdev);
 690
 691         void (*request)(struct hid_device *hdev,
 692                         struct hid_report *report, int reqtype);
 693
 694         int (*wait)(struct hid_device *hdev);
 695         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
 696
 697 };
 698
 699 #define PM_HINT_FULLON  1<<5
 700 #define PM_HINT_NORMAL  1<<1
 701
 702 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 703 /* We ignore a few input applications that are not widely used */
 704 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 705
 706 /* HID core API */
 707
 708 extern int hid_debug;
 709
 710 extern bool hid_ignore(struct hid_device *);
 711 extern int hid_add_device(struct hid_device *);
 712 extern void hid_destroy_device(struct hid_device *);
 713
 714 extern int __must_check __hid_register_driver(struct hid_driver *,
 715                 struct module *, const char *mod_name);
 716
 717 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 718 #define hid_register_driver(driver) \
 719         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 720
 721 extern void hid_unregister_driver(struct hid_driver *);
 722
 723 /**
 724  * module_hid_driver() - Helper macro for registering a HID driver
 725  * @__hid_driver: hid_driver struct
 726  *
 727  * Helper macro for HID drivers which do not do anything special in module
 728  * init/exit. This eliminates a lot of boilerplate. Each module may only
 729  * use this macro once, and calling it replaces module_init() and module_exit()
 730  */
 731 #define module_hid_driver(__hid_driver) \
 732         module_driver(__hid_driver, hid_register_driver, \
 733                       hid_unregister_driver)
 734
 735 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 736 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 737 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 738 extern void hidinput_disconnect(struct hid_device *);
 739
 740 int hid_set_field(struct hid_field *, unsigned, __s32);
 741 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 742 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 743 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 744 unsigned int hidinput_count_leds(struct hid_device *hid);
 745 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 746 void hid_output_report(struct hid_report *report, __u8 *data);
 747 struct hid_device *hid_allocate_device(void);
 748 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 749 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 750 int hid_open_report(struct hid_device *device);
 751 int hid_check_keys_pressed(struct hid_device *hid);
 752 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 753 void hid_disconnect(struct hid_device *hid);
 754 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 755                                          const struct hid_device_id *id);
 756 s32 hid_snto32(__u32 value, unsigned n);
 757
 758 /**
 759  * hid_device_io_start - enable HID input during probe, remove
 760  *
 761  * @hid - the device
 762  *
 763  * This should only be called during probe or remove and only be
 764  * called by the thread calling probe or remove. It will allow
 765  * incoming packets to be delivered to the driver.
 766  */
 767 static inline void hid_device_io_start(struct hid_device *hid) {
 768         if (hid->io_started) {
 769                 dev_warn(&hid->dev, "io already started");
 770                 return;
 771         }
 772         hid->io_started = true;
 773         up(&hid->driver_input_lock);
 774 }
 775
 776 /**
 777  * hid_device_io_stop - disable HID input during probe, remove
 778  *
 779  * @hid - the device
 780  *
 781  * Should only be called after hid_device_io_start. It will prevent
 782  * incoming packets from going to the driver for the duration of
 783  * probe, remove. If called during probe, packets will still go to the
 784  * driver after probe is complete. This function should only be called
 785  * by the thread calling probe or remove.
 786  */
 787 static inline void hid_device_io_stop(struct hid_device *hid) {
 788         if (!hid->io_started) {
 789                 dev_warn(&hid->dev, "io already stopped");
 790                 return;
 791         }
 792         hid->io_started = false;
 793         down(&hid->driver_input_lock);
 794 }
 795
 796 /**
 797  * hid_map_usage - map usage input bits
 798  *
 799  * @hidinput: hidinput which we are interested in
 800  * @usage: usage to fill in
 801  * @bit: pointer to input->{}bit (out parameter)
 802  * @max: maximal valid usage->code to consider later (out parameter)
 803  * @type: input event type (EV_KEY, EV_REL, ...)
 804  * @c: code which corresponds to this usage and type
 805  */
 806 static inline void hid_map_usage(struct hid_input *hidinput,
 807                 struct hid_usage *usage, unsigned long **bit, int *max,
 808                 __u8 type, __u16 c)
 809 {
 810         struct input_dev *input = hidinput->input;
 811
 812         usage->type = type;
 813         usage->code = c;
 814
 815         switch (type) {
 816         case EV_ABS:
 817                 *bit = input->absbit;
 818                 *max = ABS_MAX;
 819                 break;
 820         case EV_REL:
 821                 *bit = input->relbit;
 822                 *max = REL_MAX;
 823                 break;
 824         case EV_KEY:
 825                 *bit = input->keybit;
 826                 *max = KEY_MAX;
 827                 break;
 828         case EV_LED:
 829                 *bit = input->ledbit;
 830                 *max = LED_MAX;
 831                 break;
 832         }
 833 }
 834
 835 /**
 836  * hid_map_usage_clear - map usage input bits and clear the input bit
 837  *
 838  * The same as hid_map_usage, except the @c bit is also cleared in supported
 839  * bits (@bit).
 840  */
 841 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 842                 struct hid_usage *usage, unsigned long **bit, int *max,
 843                 __u8 type, __u16 c)
 844 {
 845         hid_map_usage(hidinput, usage, bit, max, type, c);
 846         clear_bit(c, *bit);
 847 }
 848
 849 /**
 850  * hid_parse - parse HW reports
 851  *
 852  * @hdev: hid device
 853  *
 854  * Call this from probe after you set up the device (if needed). Your
 855  * report_fixup will be called (if non-NULL) after reading raw report from
 856  * device before passing it to hid layer for real parsing.
 857  */
 858 static inline int __must_check hid_parse(struct hid_device *hdev)
 859 {
 860         return hid_open_report(hdev);
 861 }
 862
 863 /**
 864  * hid_hw_start - start underlaying HW
 865  *
 866  * @hdev: hid device
 867  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 868  *
 869  * Call this in probe function *after* hid_parse. This will setup HW buffers
 870  * and start the device (if not deffered to device open). hid_hw_stop must be
 871  * called if this was successful.
 872  */
 873 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 874                 unsigned int connect_mask)
 875 {
 876         int ret = hdev->ll_driver->start(hdev);
 877         if (ret || !connect_mask)
 878                 return ret;
 879         ret = hid_connect(hdev, connect_mask);
 880         if (ret)
 881                 hdev->ll_driver->stop(hdev);
 882         return ret;
 883 }
 884
 885 /**
 886  * hid_hw_stop - stop underlaying HW
 887  *
 888  * @hdev: hid device
 889  *
 890  * This is usually called from remove function or from probe when something
 891  * failed and hid_hw_start was called already.
 892  */
 893 static inline void hid_hw_stop(struct hid_device *hdev)
 894 {
 895         hid_disconnect(hdev);
 896         hdev->ll_driver->stop(hdev);
 897 }
 898
 899 /**
 900  * hid_hw_open - signal underlaying HW to start delivering events
 901  *
 902  * @hdev: hid device
 903  *
 904  * Tell underlying HW to start delivering events from the device.
 905  * This function should be called sometime after successful call
 906  * to hid_hiw_start().
 907  */
 908 static inline int __must_check hid_hw_open(struct hid_device *hdev)
 909 {
 910         return hdev->ll_driver->open(hdev);
 911 }
 912
 913 /**
 914  * hid_hw_close - signal underlaying HW to stop delivering events
 915  *
 916  * @hdev: hid device
 917  *
 918  * This function indicates that we are not interested in the events
 919  * from this device anymore. Delivery of events may or may not stop,
 920  * depending on the number of users still outstanding.
 921  */
 922 static inline void hid_hw_close(struct hid_device *hdev)
 923 {
 924         hdev->ll_driver->close(hdev);
 925 }
 926
 927 /**
 928  * hid_hw_power - requests underlying HW to go into given power mode
 929  *
 930  * @hdev: hid device
 931  * @level: requested power level (one of %PM_HINT_* defines)
 932  *
 933  * This function requests underlying hardware to enter requested power
 934  * mode.
 935  */
 936
 937 static inline int hid_hw_power(struct hid_device *hdev, int level)
 938 {
 939         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 940 }
 941
 942
 943 /**
 944  * hid_hw_request - send report request to device
 945  *
 946  * @hdev: hid device
 947  * @report: report to send
 948  * @reqtype: hid request type
 949  */
 950 static inline void hid_hw_request(struct hid_device *hdev,
 951                                   struct hid_report *report, int reqtype)
 952 {
 953         if (hdev->ll_driver->request)
 954                 hdev->ll_driver->request(hdev, report, reqtype);
 955 }
 956
 957 /**
 958  * hid_hw_idle - send idle request to device
 959  *
 960  * @hdev: hid device
 961  * @report: report to control
 962  * @idle: idle state
 963  * @reqtype: hid request type
 964  */
 965 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
 966                 int reqtype)
 967 {
 968         if (hdev->ll_driver->idle)
 969                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
 970
 971         return 0;
 972 }
 973
 974 /**
 975  * hid_hw_wait - wait for buffered io to complete
 976  *
 977  * @hdev: hid device
 978  */
 979 static inline void hid_hw_wait(struct hid_device *hdev)
 980 {
 981         if (hdev->ll_driver->wait)
 982                 hdev->ll_driver->wait(hdev);
 983 }
 984
 985 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 986                 int interrupt);
 987
 988 /* HID quirks API */
 989 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 990 int usbhid_quirks_init(char **quirks_param);
 991 void usbhid_quirks_exit(void);
 992 void usbhid_set_leds(struct hid_device *hid);
 993
 994 #ifdef CONFIG_HID_PID
 995 int hid_pidff_init(struct hid_device *hid);
 996 #else
 997 #define hid_pidff_init NULL
 998 #endif
 999
1000 #define dbg_hid(format, arg...)                                         \
1001 do {                                                                    \
1002         if (hid_debug)                                                  \
1003                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1004 } while (0)
1005
1006 #define hid_printk(level, hid, fmt, arg...)             \
1007         dev_printk(level, &(hid)->dev, fmt, ##arg)
1008 #define hid_emerg(hid, fmt, arg...)                     \
1009         dev_emerg(&(hid)->dev, fmt, ##arg)
1010 #define hid_crit(hid, fmt, arg...)                      \
1011         dev_crit(&(hid)->dev, fmt, ##arg)
1012 #define hid_alert(hid, fmt, arg...)                     \
1013         dev_alert(&(hid)->dev, fmt, ##arg)
1014 #define hid_err(hid, fmt, arg...)                       \
1015         dev_err(&(hid)->dev, fmt, ##arg)
1016 #define hid_notice(hid, fmt, arg...)                    \
1017         dev_notice(&(hid)->dev, fmt, ##arg)
1018 #define hid_warn(hid, fmt, arg...)                      \
1019         dev_warn(&(hid)->dev, fmt, ##arg)
1020 #define hid_info(hid, fmt, arg...)                      \
1021         dev_info(&(hid)->dev, fmt, ##arg)
1022 #define hid_dbg(hid, fmt, arg...)                       \
1023         dev_dbg(&(hid)->dev, fmt, ##arg)
1024
1025 #endif