include/linux/hid.h

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