linux/include/linux/hid.h
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   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
  46struct 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_SKIP_OUTPUT_REPORTS           0x00010000
 286#define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 287#define HID_QUIRK_NO_INIT_REPORTS               0x20000000
 288#define HID_QUIRK_NO_IGNORE                     0x40000000
 289#define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
 290
 291/*
 292 * HID device groups
 293 */
 294#define HID_GROUP_GENERIC                       0x0001
 295#define HID_GROUP_MULTITOUCH                    0x0002
 296#define HID_GROUP_SENSOR_HUB                    0x0003
 297
 298/*
 299 * This is the global environment of the parser. This information is
 300 * persistent for main-items. The global environment can be saved and
 301 * restored with PUSH/POP statements.
 302 */
 303
 304struct hid_global {
 305        unsigned usage_page;
 306        __s32    logical_minimum;
 307        __s32    logical_maximum;
 308        __s32    physical_minimum;
 309        __s32    physical_maximum;
 310        __s32    unit_exponent;
 311        unsigned unit;
 312        unsigned report_id;
 313        unsigned report_size;
 314        unsigned report_count;
 315};
 316
 317/*
 318 * This is the local environment. It is persistent up the next main-item.
 319 */
 320
 321#define HID_MAX_USAGES                  12288
 322#define HID_DEFAULT_NUM_COLLECTIONS     16
 323
 324struct hid_local {
 325        unsigned usage[HID_MAX_USAGES]; /* usage array */
 326        unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 327        unsigned usage_index;
 328        unsigned usage_minimum;
 329        unsigned delimiter_depth;
 330        unsigned delimiter_branch;
 331};
 332
 333/*
 334 * This is the collection stack. We climb up the stack to determine
 335 * application and function of each field.
 336 */
 337
 338struct hid_collection {
 339        unsigned type;
 340        unsigned usage;
 341        unsigned level;
 342};
 343
 344struct hid_usage {
 345        unsigned  hid;                  /* hid usage code */
 346        unsigned  collection_index;     /* index into collection array */
 347        unsigned  usage_index;          /* index into usage array */
 348        /* hidinput data */
 349        __u16     code;                 /* input driver code */
 350        __u8      type;                 /* input driver type */
 351        __s8      hat_min;              /* hat switch fun */
 352        __s8      hat_max;              /* ditto */
 353        __s8      hat_dir;              /* ditto */
 354};
 355
 356struct hid_input;
 357
 358struct hid_field {
 359        unsigned  physical;             /* physical usage for this field */
 360        unsigned  logical;              /* logical usage for this field */
 361        unsigned  application;          /* application usage for this field */
 362        struct hid_usage *usage;        /* usage table for this function */
 363        unsigned  maxusage;             /* maximum usage index */
 364        unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 365        unsigned  report_offset;        /* bit offset in the report */
 366        unsigned  report_size;          /* size of this field in the report */
 367        unsigned  report_count;         /* number of this field in the report */
 368        unsigned  report_type;          /* (input,output,feature) */
 369        __s32    *value;                /* last known value(s) */
 370        __s32     logical_minimum;
 371        __s32     logical_maximum;
 372        __s32     physical_minimum;
 373        __s32     physical_maximum;
 374        __s32     unit_exponent;
 375        unsigned  unit;
 376        struct hid_report *report;      /* associated report */
 377        unsigned index;                 /* index into report->field[] */
 378        /* hidinput data */
 379        struct hid_input *hidinput;     /* associated input structure */
 380        __u16 dpad;                     /* dpad input code */
 381};
 382
 383#define HID_MAX_FIELDS 256
 384
 385struct hid_report {
 386        struct list_head list;
 387        unsigned id;                                    /* id of this report */
 388        unsigned type;                                  /* report type */
 389        struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 390        unsigned maxfield;                              /* maximum valid field index */
 391        unsigned size;                                  /* size of the report (bits) */
 392        struct hid_device *device;                      /* associated device */
 393};
 394
 395struct hid_report_enum {
 396        unsigned numbered;
 397        struct list_head report_list;
 398        struct hid_report *report_id_hash[256];
 399};
 400
 401#define HID_REPORT_TYPES 3
 402
 403#define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 404#define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 405#define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 406#define HID_OUTPUT_FIFO_SIZE    64
 407
 408struct hid_control_fifo {
 409        unsigned char dir;
 410        struct hid_report *report;
 411        char *raw_report;
 412};
 413
 414struct hid_output_fifo {
 415        struct hid_report *report;
 416        char *raw_report;
 417};
 418
 419#define HID_CLAIMED_INPUT       1
 420#define HID_CLAIMED_HIDDEV      2
 421#define HID_CLAIMED_HIDRAW      4
 422
 423#define HID_STAT_ADDED          1
 424#define HID_STAT_PARSED         2
 425
 426struct hid_input {
 427        struct list_head list;
 428        struct hid_report *report;
 429        struct input_dev *input;
 430};
 431
 432enum hid_type {
 433        HID_TYPE_OTHER = 0,
 434        HID_TYPE_USBMOUSE,
 435        HID_TYPE_USBNONE
 436};
 437
 438struct hid_driver;
 439struct hid_ll_driver;
 440
 441struct hid_device {                                                     /* device report descriptor */
 442        __u8 *dev_rdesc;
 443        unsigned dev_rsize;
 444        __u8 *rdesc;
 445        unsigned rsize;
 446        struct hid_collection *collection;                              /* List of HID collections */
 447        unsigned collection_size;                                       /* Number of allocated hid_collections */
 448        unsigned maxcollection;                                         /* Number of parsed collections */
 449        unsigned maxapplication;                                        /* Number of applications */
 450        __u16 bus;                                                      /* BUS ID */
 451        __u16 group;                                                    /* Report group */
 452        __u32 vendor;                                                   /* Vendor ID */
 453        __u32 product;                                                  /* Product ID */
 454        __u32 version;                                                  /* HID version */
 455        enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 456        unsigned country;                                               /* HID country */
 457        struct hid_report_enum report_enum[HID_REPORT_TYPES];
 458
 459        struct semaphore driver_lock;                                   /* protects the current driver */
 460        struct device dev;                                              /* device */
 461        struct hid_driver *driver;
 462        struct hid_ll_driver *ll_driver;
 463
 464#ifdef CONFIG_HID_BATTERY_STRENGTH
 465        /*
 466         * Power supply information for HID devices which report
 467         * battery strength. power_supply is registered iff
 468         * battery.name is non-NULL.
 469         */
 470        struct power_supply battery;
 471        __s32 battery_min;
 472        __s32 battery_max;
 473        __s32 battery_report_type;
 474        __s32 battery_report_id;
 475#endif
 476
 477        unsigned int status;                                            /* see STAT flags above */
 478        unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 479        unsigned quirks;                                                /* Various quirks the device can pull on us */
 480
 481        struct list_head inputs;                                        /* The list of inputs */
 482        void *hiddev;                                                   /* The hiddev structure */
 483        void *hidraw;
 484        int minor;                                                      /* Hiddev minor number */
 485
 486        int open;                                                       /* is the device open by anyone? */
 487        char name[128];                                                 /* Device name */
 488        char phys[64];                                                  /* Device physical location */
 489        char uniq[64];                                                  /* Device unique identifier (serial #) */
 490
 491        void *driver_data;
 492
 493        /* temporary hid_ff handling (until moved to the drivers) */
 494        int (*ff_init)(struct hid_device *);
 495
 496        /* hiddev event handler */
 497        int (*hiddev_connect)(struct hid_device *, unsigned int);
 498        void (*hiddev_disconnect)(struct hid_device *);
 499        void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 500                                  struct hid_usage *, __s32);
 501        void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 502
 503        /* handler for raw input (Get_Report) data, used by hidraw */
 504        int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
 505
 506        /* handler for raw output data, used by hidraw */
 507        int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
 508
 509        /* debugging support via debugfs */
 510        unsigned short debug;
 511        struct dentry *debug_dir;
 512        struct dentry *debug_rdesc;
 513        struct dentry *debug_events;
 514        struct list_head debug_list;
 515        wait_queue_head_t debug_wait;
 516};
 517
 518static inline void *hid_get_drvdata(struct hid_device *hdev)
 519{
 520        return dev_get_drvdata(&hdev->dev);
 521}
 522
 523static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 524{
 525        dev_set_drvdata(&hdev->dev, data);
 526}
 527
 528#define HID_GLOBAL_STACK_SIZE 4
 529#define HID_COLLECTION_STACK_SIZE 4
 530
 531struct hid_parser {
 532        struct hid_global     global;
 533        struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 534        unsigned              global_stack_ptr;
 535        struct hid_local      local;
 536        unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 537        unsigned              collection_stack_ptr;
 538        struct hid_device    *device;
 539};
 540
 541struct hid_class_descriptor {
 542        __u8  bDescriptorType;
 543        __le16 wDescriptorLength;
 544} __attribute__ ((packed));
 545
 546struct hid_descriptor {
 547        __u8  bLength;
 548        __u8  bDescriptorType;
 549        __le16 bcdHID;
 550        __u8  bCountryCode;
 551        __u8  bNumDescriptors;
 552
 553        struct hid_class_descriptor desc[1];
 554} __attribute__ ((packed));
 555
 556#define HID_DEVICE(b, g, ven, prod)                                     \
 557        .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
 558#define HID_USB_DEVICE(ven, prod)                               \
 559        .bus = BUS_USB, .vendor = (ven), .product = (prod)
 560#define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
 561        .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
 562
 563#define HID_REPORT_ID(rep) \
 564        .report_type = (rep)
 565#define HID_USAGE_ID(uhid, utype, ucode) \
 566        .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 567/* we don't want to catch types and codes equal to 0 */
 568#define HID_TERMINATOR          (HID_ANY_ID - 1)
 569
 570struct hid_report_id {
 571        __u32 report_type;
 572};
 573struct hid_usage_id {
 574        __u32 usage_hid;
 575        __u32 usage_type;
 576        __u32 usage_code;
 577};
 578
 579/**
 580 * struct hid_driver
 581 * @name: driver name (e.g. "Footech_bar-wheel")
 582 * @id_table: which devices is this driver for (must be non-NULL for probe
 583 *            to be called)
 584 * @dyn_list: list of dynamically added device ids
 585 * @dyn_lock: lock protecting @dyn_list
 586 * @probe: new device inserted
 587 * @remove: device removed (NULL if not a hot-plug capable driver)
 588 * @report_table: on which reports to call raw_event (NULL means all)
 589 * @raw_event: if report in report_table, this hook is called (NULL means nop)
 590 * @usage_table: on which events to call event (NULL means all)
 591 * @event: if usage in usage_table, this hook is called (NULL means nop)
 592 * @report_fixup: called before report descriptor parsing (NULL means nop)
 593 * @input_mapping: invoked on input registering before mapping an usage
 594 * @input_mapped: invoked on input registering after mapping an usage
 595 * @input_configured: invoked just before the device is registered
 596 * @feature_mapping: invoked on feature registering
 597 * @suspend: invoked on suspend (NULL means nop)
 598 * @resume: invoked on resume if device was not reset (NULL means nop)
 599 * @reset_resume: invoked on resume if device was reset (NULL means nop)
 600 *
 601 * raw_event and event should return 0 on no action performed, 1 when no
 602 * further processing should be done and negative on error
 603 *
 604 * input_mapping shall return a negative value to completely ignore this usage
 605 * (e.g. doubled or invalid usage), zero to continue with parsing of this
 606 * usage by generic code (no special handling needed) or positive to skip
 607 * generic parsing (needed special handling which was done in the hook already)
 608 * input_mapped shall return negative to inform the layer that this usage
 609 * should not be considered for further processing or zero to notify that
 610 * no processing was performed and should be done in a generic manner
 611 * Both these functions may be NULL which means the same behavior as returning
 612 * zero from them.
 613 */
 614struct hid_driver {
 615        char *name;
 616        const struct hid_device_id *id_table;
 617
 618        struct list_head dyn_list;
 619        spinlock_t dyn_lock;
 620
 621        int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 622        void (*remove)(struct hid_device *dev);
 623
 624        const struct hid_report_id *report_table;
 625        int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 626                        u8 *data, int size);
 627        const struct hid_usage_id *usage_table;
 628        int (*event)(struct hid_device *hdev, struct hid_field *field,
 629                        struct hid_usage *usage, __s32 value);
 630
 631        __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
 632                        unsigned int *size);
 633
 634        int (*input_mapping)(struct hid_device *hdev,
 635                        struct hid_input *hidinput, struct hid_field *field,
 636                        struct hid_usage *usage, unsigned long **bit, int *max);
 637        int (*input_mapped)(struct hid_device *hdev,
 638                        struct hid_input *hidinput, struct hid_field *field,
 639                        struct hid_usage *usage, unsigned long **bit, int *max);
 640        void (*input_configured)(struct hid_device *hdev,
 641                                 struct hid_input *hidinput);
 642        void (*feature_mapping)(struct hid_device *hdev,
 643                        struct hid_field *field,
 644                        struct hid_usage *usage);
 645#ifdef CONFIG_PM
 646        int (*suspend)(struct hid_device *hdev, pm_message_t message);
 647        int (*resume)(struct hid_device *hdev);
 648        int (*reset_resume)(struct hid_device *hdev);
 649#endif
 650/* private: */
 651        struct device_driver driver;
 652};
 653
 654/**
 655 * hid_ll_driver - low level driver callbacks
 656 * @start: called on probe to start the device
 657 * @stop: called on remove
 658 * @open: called by input layer on open
 659 * @close: called by input layer on close
 660 * @hidinput_input_event: event input event (e.g. ff or leds)
 661 * @parse: this method is called only once to parse the device data,
 662 *         shouldn't allocate anything to not leak memory
 663 */
 664struct hid_ll_driver {
 665        int (*start)(struct hid_device *hdev);
 666        void (*stop)(struct hid_device *hdev);
 667
 668        int (*open)(struct hid_device *hdev);
 669        void (*close)(struct hid_device *hdev);
 670
 671        int (*power)(struct hid_device *hdev, int level);
 672
 673        int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 674                        unsigned int code, int value);
 675
 676        int (*parse)(struct hid_device *hdev);
 677};
 678
 679#define PM_HINT_FULLON  1<<5
 680#define PM_HINT_NORMAL  1<<1
 681
 682/* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 683/* We ignore a few input applications that are not widely used */
 684#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
 685
 686/* HID core API */
 687
 688extern int hid_debug;
 689
 690extern bool hid_ignore(struct hid_device *);
 691extern int hid_add_device(struct hid_device *);
 692extern void hid_destroy_device(struct hid_device *);
 693
 694extern int __must_check __hid_register_driver(struct hid_driver *,
 695                struct module *, const char *mod_name);
 696
 697/* use a define to avoid include chaining to get THIS_MODULE & friends */
 698#define hid_register_driver(driver) \
 699        __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 700
 701extern void hid_unregister_driver(struct hid_driver *);
 702
 703extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 704extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 705extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 706extern void hidinput_disconnect(struct hid_device *);
 707
 708int hid_set_field(struct hid_field *, unsigned, __s32);
 709int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 710int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 711struct hid_field *hidinput_get_led_field(struct hid_device *hid);
 712unsigned int hidinput_count_leds(struct hid_device *hid);
 713__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
 714void hid_output_report(struct hid_report *report, __u8 *data);
 715struct hid_device *hid_allocate_device(void);
 716struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
 717int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 718int hid_open_report(struct hid_device *device);
 719int hid_check_keys_pressed(struct hid_device *hid);
 720int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 721void hid_disconnect(struct hid_device *hid);
 722const struct hid_device_id *hid_match_id(struct hid_device *hdev,
 723                                         const struct hid_device_id *id);
 724s32 hid_snto32(__u32 value, unsigned n);
 725
 726/**
 727 * hid_map_usage - map usage input bits
 728 *
 729 * @hidinput: hidinput which we are interested in
 730 * @usage: usage to fill in
 731 * @bit: pointer to input->{}bit (out parameter)
 732 * @max: maximal valid usage->code to consider later (out parameter)
 733 * @type: input event type (EV_KEY, EV_REL, ...)
 734 * @c: code which corresponds to this usage and type
 735 */
 736static inline void hid_map_usage(struct hid_input *hidinput,
 737                struct hid_usage *usage, unsigned long **bit, int *max,
 738                __u8 type, __u16 c)
 739{
 740        struct input_dev *input = hidinput->input;
 741
 742        usage->type = type;
 743        usage->code = c;
 744
 745        switch (type) {
 746        case EV_ABS:
 747                *bit = input->absbit;
 748                *max = ABS_MAX;
 749                break;
 750        case EV_REL:
 751                *bit = input->relbit;
 752                *max = REL_MAX;
 753                break;
 754        case EV_KEY:
 755                *bit = input->keybit;
 756                *max = KEY_MAX;
 757                break;
 758        case EV_LED:
 759                *bit = input->ledbit;
 760                *max = LED_MAX;
 761                break;
 762        }
 763}
 764
 765/**
 766 * hid_map_usage_clear - map usage input bits and clear the input bit
 767 *
 768 * The same as hid_map_usage, except the @c bit is also cleared in supported
 769 * bits (@bit).
 770 */
 771static inline void hid_map_usage_clear(struct hid_input *hidinput,
 772                struct hid_usage *usage, unsigned long **bit, int *max,
 773                __u8 type, __u16 c)
 774{
 775        hid_map_usage(hidinput, usage, bit, max, type, c);
 776        clear_bit(c, *bit);
 777}
 778
 779/**
 780 * hid_parse - parse HW reports
 781 *
 782 * @hdev: hid device
 783 *
 784 * Call this from probe after you set up the device (if needed). Your
 785 * report_fixup will be called (if non-NULL) after reading raw report from
 786 * device before passing it to hid layer for real parsing.
 787 */
 788static inline int __must_check hid_parse(struct hid_device *hdev)
 789{
 790        return hid_open_report(hdev);
 791}
 792
 793/**
 794 * hid_hw_start - start underlaying HW
 795 *
 796 * @hdev: hid device
 797 * @connect_mask: which outputs to connect, see HID_CONNECT_*
 798 *
 799 * Call this in probe function *after* hid_parse. This will setup HW buffers
 800 * and start the device (if not deffered to device open). hid_hw_stop must be
 801 * called if this was successful.
 802 */
 803static inline int __must_check hid_hw_start(struct hid_device *hdev,
 804                unsigned int connect_mask)
 805{
 806        int ret = hdev->ll_driver->start(hdev);
 807        if (ret || !connect_mask)
 808                return ret;
 809        ret = hid_connect(hdev, connect_mask);
 810        if (ret)
 811                hdev->ll_driver->stop(hdev);
 812        return ret;
 813}
 814
 815/**
 816 * hid_hw_stop - stop underlaying HW
 817 *
 818 * @hdev: hid device
 819 *
 820 * This is usually called from remove function or from probe when something
 821 * failed and hid_hw_start was called already.
 822 */
 823static inline void hid_hw_stop(struct hid_device *hdev)
 824{
 825        hid_disconnect(hdev);
 826        hdev->ll_driver->stop(hdev);
 827}
 828
 829/**
 830 * hid_hw_open - signal underlaying HW to start delivering events
 831 *
 832 * @hdev: hid device
 833 *
 834 * Tell underlying HW to start delivering events from the device.
 835 * This function should be called sometime after successful call
 836 * to hid_hiw_start().
 837 */
 838static inline int __must_check hid_hw_open(struct hid_device *hdev)
 839{
 840        return hdev->ll_driver->open(hdev);
 841}
 842
 843/**
 844 * hid_hw_close - signal underlaying HW to stop delivering events
 845 *
 846 * @hdev: hid device
 847 *
 848 * This function indicates that we are not interested in the events
 849 * from this device anymore. Delivery of events may or may not stop,
 850 * depending on the number of users still outstanding.
 851 */
 852static inline void hid_hw_close(struct hid_device *hdev)
 853{
 854        hdev->ll_driver->close(hdev);
 855}
 856
 857/**
 858 * hid_hw_power - requests underlying HW to go into given power mode
 859 *
 860 * @hdev: hid device
 861 * @level: requested power level (one of %PM_HINT_* defines)
 862 *
 863 * This function requests underlying hardware to enter requested power
 864 * mode.
 865 */
 866
 867static inline int hid_hw_power(struct hid_device *hdev, int level)
 868{
 869        return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 870}
 871
 872int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 873                int interrupt);
 874
 875extern int hid_generic_init(void);
 876extern void hid_generic_exit(void);
 877
 878/* HID quirks API */
 879u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 880int usbhid_quirks_init(char **quirks_param);
 881void usbhid_quirks_exit(void);
 882void usbhid_set_leds(struct hid_device *hid);
 883
 884#ifdef CONFIG_HID_PID
 885int hid_pidff_init(struct hid_device *hid);
 886#else
 887#define hid_pidff_init NULL
 888#endif
 889
 890#define dbg_hid(format, arg...)                                         \
 891do {                                                                    \
 892        if (hid_debug)                                                  \
 893                printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
 894} while (0)
 895
 896#define hid_printk(level, hid, fmt, arg...)             \
 897        dev_printk(level, &(hid)->dev, fmt, ##arg)
 898#define hid_emerg(hid, fmt, arg...)                     \
 899        dev_emerg(&(hid)->dev, fmt, ##arg)
 900#define hid_crit(hid, fmt, arg...)                      \
 901        dev_crit(&(hid)->dev, fmt, ##arg)
 902#define hid_alert(hid, fmt, arg...)                     \
 903        dev_alert(&(hid)->dev, fmt, ##arg)
 904#define hid_err(hid, fmt, arg...)                       \
 905        dev_err(&(hid)->dev, fmt, ##arg)
 906#define hid_notice(hid, fmt, arg...)                    \
 907        dev_notice(&(hid)->dev, fmt, ##arg)
 908#define hid_warn(hid, fmt, arg...)                      \
 909        dev_warn(&(hid)->dev, fmt, ##arg)
 910#define hid_info(hid, fmt, arg...)                      \
 911        dev_info(&(hid)->dev, fmt, ##arg)
 912#define hid_dbg(hid, fmt, arg...)                       \
 913        dev_dbg(&(hid)->dev, fmt, ##arg)
 914
 915#endif
 916
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