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 /*
 242  * HID report types --- Ouch! HID spec says 1 2 3!
 243  */
 244
 245 #define HID_INPUT_REPORT        0
 246 #define HID_OUTPUT_REPORT       1
 247 #define HID_FEATURE_REPORT      2
 248
 249 /*
 250  * HID connect requests
 251  */
 252
 253 #define HID_CONNECT_HIDINPUT            0x01
 254 #define HID_CONNECT_HIDINPUT_FORCE      0x02
 255 #define HID_CONNECT_HIDRAW              0x04
 256 #define HID_CONNECT_HIDDEV              0x08
 257 #define HID_CONNECT_HIDDEV_FORCE        0x10
 258 #define HID_CONNECT_FF                  0x20
 259 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
 260                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
 261
 262 /*
 263  * HID device quirks.
 264  */
 265
 266 /*
 267  * Increase this if you need to configure more HID quirks at module load time
 268  */
 269 #define MAX_USBHID_BOOT_QUIRKS 4
 270
 271 #define HID_QUIRK_INVERT                        0x00000001
 272 #define HID_QUIRK_NOTOUCH                       0x00000002
 273 #define HID_QUIRK_NOGET                         0x00000008
 274 #define HID_QUIRK_BADPAD                        0x00000020
 275 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 276 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
 277 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
 278
 279 /*
 280  * This is the global environment of the parser. This information is
 281  * persistent for main-items. The global environment can be saved and
 282  * restored with PUSH/POP statements.
 283  */
 284
 285 struct hid_global {
 286         unsigned usage_page;
 287         __s32    logical_minimum;
 288         __s32    logical_maximum;
 289         __s32    physical_minimum;
 290         __s32    physical_maximum;
 291         __s32    unit_exponent;
 292         unsigned unit;
 293         unsigned report_id;
 294         unsigned report_size;
 295         unsigned report_count;
 296 };
 297
 298 /*
 299  * This is the local environment. It is persistent up the next main-item.
 300  */
 301
 302 #define HID_MAX_USAGES                  12288
 303 #define HID_DEFAULT_NUM_COLLECTIONS     16
 304
 305 struct hid_local {
 306         unsigned usage[HID_MAX_USAGES]; /* usage array */
 307         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 308         unsigned usage_index;
 309         unsigned usage_minimum;
 310         unsigned delimiter_depth;
 311         unsigned delimiter_branch;
 312 };
 313
 314 /*
 315  * This is the collection stack. We climb up the stack to determine
 316  * application and function of each field.
 317  */
 318
 319 struct hid_collection {
 320         unsigned type;
 321         unsigned usage;
 322         unsigned level;
 323 };
 324
 325 struct hid_usage {
 326         unsigned  hid;                  /* hid usage code */
 327         unsigned  collection_index;     /* index into collection array */
 328         /* hidinput data */
 329         __u16     code;                 /* input driver code */
 330         __u8      type;                 /* input driver type */
 331         __s8      hat_min;              /* hat switch fun */
 332         __s8      hat_max;              /* ditto */
 333         __s8      hat_dir;              /* ditto */
 334 };
 335
 336 struct hid_input;
 337
 338 struct hid_field {
 339         unsigned  physical;             /* physical usage for this field */
 340         unsigned  logical;              /* logical usage for this field */
 341         unsigned  application;          /* application usage for this field */
 342         struct hid_usage *usage;        /* usage table for this function */
 343         unsigned  maxusage;             /* maximum usage index */
 344         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 345         unsigned  report_offset;        /* bit offset in the report */
 346         unsigned  report_size;          /* size of this field in the report */
 347         unsigned  report_count;         /* number of this field in the report */
 348         unsigned  report_type;          /* (input,output,feature) */
 349         __s32    *value;                /* last known value(s) */
 350         __s32     logical_minimum;
 351         __s32     logical_maximum;
 352         __s32     physical_minimum;
 353         __s32     physical_maximum;
 354         __s32     unit_exponent;
 355         unsigned  unit;
 356         struct hid_report *report;      /* associated report */
 357         unsigned index;                 /* index into report->field[] */
 358         /* hidinput data */
 359         struct hid_input *hidinput;     /* associated input structure */
 360         __u16 dpad;                     /* dpad input code */
 361 };
 362
 363 #define HID_MAX_FIELDS 64
 364
 365 struct hid_report {
 366         struct list_head list;
 367         unsigned id;                                    /* id of this report */
 368         unsigned type;                                  /* report type */
 369         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 370         unsigned maxfield;                              /* maximum valid field index */
 371         unsigned size;                                  /* size of the report (bits) */
 372         struct hid_device *device;                      /* associated device */
 373 };
 374
 375 struct hid_report_enum {
 376         unsigned numbered;
 377         struct list_head report_list;
 378         struct hid_report *report_id_hash[256];
 379 };
 380
 381 #define HID_REPORT_TYPES 3
 382
 383 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 384 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 385 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 386 #define HID_OUTPUT_FIFO_SIZE    64
 387
 388 struct hid_control_fifo {
 389         unsigned char dir;
 390         struct hid_report *report;
 391         char *raw_report;
 392 };
 393
 394 struct hid_output_fifo {
 395         struct hid_report *report;
 396         char *raw_report;
 397 };
 398
 399 #define HID_CLAIMED_INPUT       1
 400 #define HID_CLAIMED_HIDDEV      2
 401 #define HID_CLAIMED_HIDRAW      4
 402
 403 #define HID_STAT_ADDED          1
 404 #define HID_STAT_PARSED         2
 405
 406 #define HID_CTRL_RUNNING        1
 407 #define HID_OUT_RUNNING         2
 408 #define HID_IN_RUNNING          3
 409 #define HID_RESET_PENDING       4
 410 #define HID_SUSPENDED           5
 411 #define HID_CLEAR_HALT          6
 412 #define HID_DISCONNECTED        7
 413 #define HID_STARTED             8
 414
 415 struct hid_input {
 416         struct list_head list;
 417         struct hid_report *report;
 418         struct input_dev *input;
 419 };
 420
 421 enum hid_type {
 422         HID_TYPE_OTHER = 0,
 423         HID_TYPE_USBMOUSE
 424 };
 425
 426 struct hid_driver;
 427 struct hid_ll_driver;
 428
 429 struct hid_device {                                                     /* device report descriptor */
 430         __u8 *rdesc;
 431         unsigned rsize;
 432         struct hid_collection *collection;                              /* List of HID collections */
 433         unsigned collection_size;                                       /* Number of allocated hid_collections */
 434         unsigned maxcollection;                                         /* Number of parsed collections */
 435         unsigned maxapplication;                                        /* Number of applications */
 436         __u16 bus;                                                      /* BUS ID */
 437         __u32 vendor;                                                   /* Vendor ID */
 438         __u32 product;                                                  /* Product ID */
 439         __u32 version;                                                  /* HID version */
 440         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
 441         unsigned country;                                               /* HID country */
 442         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 443
 444         struct device dev;                                              /* device */
 445         struct hid_driver *driver;
 446         struct hid_ll_driver *ll_driver;
 447
 448         unsigned int status;                                            /* see STAT flags above */
 449         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 450         unsigned quirks;                                                /* Various quirks the device can pull on us */
 451
 452         struct list_head inputs;                                        /* The list of inputs */
 453         void *hiddev;                                                   /* The hiddev structure */
 454         void *hidraw;
 455         int minor;                                                      /* Hiddev minor number */
 456
 457         int open;                                                       /* is the device open by anyone? */
 458         char name[128];                                                 /* Device name */
 459         char phys[64];                                                  /* Device physical location */
 460         char uniq[64];                                                  /* Device unique identifier (serial #) */
 461
 462         void *driver_data;
 463
 464         /* temporary hid_ff handling (until moved to the drivers) */
 465         int (*ff_init)(struct hid_device *);
 466
 467         /* hiddev event handler */
 468         int (*hiddev_connect)(struct hid_device *, unsigned int);
 469         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 470                                   struct hid_usage *, __s32);
 471         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 472
 473         /* handler for raw output data, used by hidraw */
 474         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t);
 475 };
 476
 477 static inline void *hid_get_drvdata(struct hid_device *hdev)
 478 {
 479         return dev_get_drvdata(&hdev->dev);
 480 }
 481
 482 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 483 {
 484         dev_set_drvdata(&hdev->dev, data);
 485 }
 486
 487 #define HID_GLOBAL_STACK_SIZE 4
 488 #define HID_COLLECTION_STACK_SIZE 4
 489
 490 struct hid_parser {
 491         struct hid_global     global;
 492         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 493         unsigned              global_stack_ptr;
 494         struct hid_local      local;
 495         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 496         unsigned              collection_stack_ptr;
 497         struct hid_device    *device;
 498 };
 499
 500 struct hid_class_descriptor {
 501         __u8  bDescriptorType;
 502         __le16 wDescriptorLength;
 503 } __attribute__ ((packed));
 504
 505 struct hid_descriptor {
 506         __u8  bLength;
 507         __u8  bDescriptorType;
 508         __le16 bcdHID;
 509         __u8  bCountryCode;
 510         __u8  bNumDescriptors;
 511
 512         struct hid_class_descriptor desc[1];
 513 } __attribute__ ((packed));
 514
 515 #define HID_DEVICE(b, ven, prod) \
 516         .bus = (b), \
 517         .vendor = (ven), .product = (prod)
 518
 519 #define HID_USB_DEVICE(ven, prod)       HID_DEVICE(BUS_USB, ven, prod)
 520 #define HID_BLUETOOTH_DEVICE(ven, prod) HID_DEVICE(BUS_BLUETOOTH, ven, prod)
 521
 522 #define HID_REPORT_ID(rep) \
 523         .report_type = (rep)
 524 #define HID_USAGE_ID(uhid, utype, ucode) \
 525         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 526 /* we don't want to catch types and codes equal to 0 */
 527 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 528
 529 struct hid_report_id {
 530         __u32 report_type;
 531 };
 532 struct hid_usage_id {
 533         __u32 usage_hid;
 534         __u32 usage_type;
 535         __u32 usage_code;
 536 };
 537
 538 /**
 539  * struct hid_driver
 540  * @name: driver name (e.g. "Footech_bar-wheel")
 541  * @id_table: which devices is this driver for (must be non-NULL for probe
 542  *            to be called)
 543  * @probe: new device inserted
 544  * @remove: device removed (NULL if not a hot-plug capable driver)
 545  * @report_table: on which reports to call raw_event (NULL means all)
 546  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 547  * @usage_table: on which events to call event (NULL means all)
 548  * @event: if usage in usage_table, this hook is called (NULL means nop)
 549  * @report_fixup: called before report descriptor parsing (NULL means nop)
 550  * @input_mapping: invoked on input registering before mapping an usage
 551  * @input_mapped: invoked on input registering after mapping an usage
 552  *
 553  * raw_event and event should return 0 on no action performed, 1 when no
 554  * further processing should be done and negative on error
 555  *
 556  * input_mapping shall return a negative value to completely ignore this usage
 557  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 558  * usage by generic code (no special handling needed) or positive to skip
 559  * generic parsing (needed special handling which was done in the hook already)
 560  * input_mapped shall return negative to inform the layer that this usage
 561  * should not be considered for further processing or zero to notify that
 562  * no processing was performed and should be done in a generic manner
 563  * Both these functions may be NULL which means the same behavior as returning
 564  * zero from them.
 565  */
 566 struct hid_driver {
 567         char *name;
 568         const struct hid_device_id *id_table;
 569
 570         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 571         void (*remove)(struct hid_device *dev);
 572
 573         const struct hid_report_id *report_table;
 574         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 575                         u8 *data, int size);
 576         const struct hid_usage_id *usage_table;
 577         int (*event)(struct hid_device *hdev, struct hid_field *field,
 578                         struct hid_usage *usage, __s32 value);
 579
 580         void (*report_fixup)(struct hid_device *hdev, __u8 *buf,
 581                         unsigned int size);
 582
 583         int (*input_mapping)(struct hid_device *hdev,
 584                         struct hid_input *hidinput, struct hid_field *field,
 585                         struct hid_usage *usage, unsigned long **bit, int *max);
 586         int (*input_mapped)(struct hid_device *hdev,
 587                         struct hid_input *hidinput, struct hid_field *field,
 588                         struct hid_usage *usage, unsigned long **bit, int *max);
 589 /* private: */
 590         struct device_driver driver;
 591 };
 592
 593 /**
 594  * hid_ll_driver - low level driver callbacks
 595  * @start: called on probe to start the device
 596  * @stop: called on remove
 597  * @open: called by input layer on open
 598  * @close: called by input layer on close
 599  * @hidinput_input_event: event input event (e.g. ff or leds)
 600  * @parse: this method is called only once to parse the device data,
 601  *         shouldn't allocate anything to not leak memory
 602  */
 603 struct hid_ll_driver {
 604         int (*start)(struct hid_device *hdev);
 605         void (*stop)(struct hid_device *hdev);
 606
 607         int (*open)(struct hid_device *hdev);
 608         void (*close)(struct hid_device *hdev);
 609
 610         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 611                         unsigned int code, int value);
 612
 613         int (*parse)(struct hid_device *hdev);
 614 };
 615
 616 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 617 /* We ignore a few input applications that are not widely used */
 618 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || (a == 0x000d0002))
 619
 620 /* HID core API */
 621
 622 #ifdef CONFIG_HID_DEBUG
 623 extern int hid_debug;
 624 #endif
 625
 626 extern int hid_add_device(struct hid_device *);
 627 extern void hid_destroy_device(struct hid_device *);
 628
 629 extern int __must_check __hid_register_driver(struct hid_driver *,
 630                 struct module *, const char *mod_name);
 631 static inline int __must_check hid_register_driver(struct hid_driver *driver)
 632 {
 633         return __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
 634 }
 635 extern void hid_unregister_driver(struct hid_driver *);
 636
 637 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 638 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 639 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 640 extern void hidinput_disconnect(struct hid_device *);
 641
 642 int hid_set_field(struct hid_field *, unsigned, __s32);
 643 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 644 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 645 void hid_output_report(struct hid_report *report, __u8 *data);
 646 struct hid_device *hid_allocate_device(void);
 647 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 648 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 649
 650 /**
 651  * hid_map_usage - map usage input bits
 652  *
 653  * @hidinput: hidinput which we are interested in
 654  * @usage: usage to fill in
 655  * @bit: pointer to input->{}bit (out parameter)
 656  * @max: maximal valid usage->code to consider later (out parameter)
 657  * @type: input event type (EV_KEY, EV_REL, ...)
 658  * @c: code which corresponds to this usage and type
 659  */
 660 static inline void hid_map_usage(struct hid_input *hidinput,
 661                 struct hid_usage *usage, unsigned long **bit, int *max,
 662                 __u8 type, __u16 c)
 663 {
 664         struct input_dev *input = hidinput->input;
 665
 666         usage->type = type;
 667         usage->code = c;
 668
 669         switch (type) {
 670         case EV_ABS:
 671                 *bit = input->absbit;
 672                 *max = ABS_MAX;
 673                 break;
 674         case EV_REL:
 675                 *bit = input->relbit;
 676                 *max = REL_MAX;
 677                 break;
 678         case EV_KEY:
 679                 *bit = input->keybit;
 680                 *max = KEY_MAX;
 681                 break;
 682         case EV_LED:
 683                 *bit = input->ledbit;
 684                 *max = LED_MAX;
 685                 break;
 686         }
 687 }
 688
 689 /**
 690  * hid_map_usage_clear - map usage input bits and clear the input bit
 691  *
 692  * The same as hid_map_usage, except the @c bit is also cleared in supported
 693  * bits (@bit).
 694  */
 695 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 696                 struct hid_usage *usage, unsigned long **bit, int *max,
 697                 __u8 type, __u16 c)
 698 {
 699         hid_map_usage(hidinput, usage, bit, max, type, c);
 700         clear_bit(c, *bit);
 701 }
 702
 703 /**
 704  * hid_parse - parse HW reports
 705  *
 706  * @hdev: hid device
 707  *
 708  * Call this from probe after you set up the device (if needed). Your
 709  * report_fixup will be called (if non-NULL) after reading raw report from
 710  * device before passing it to hid layer for real parsing.
 711  */
 712 static inline int __must_check hid_parse(struct hid_device *hdev)
 713 {
 714         int ret;
 715
 716         if (hdev->status & HID_STAT_PARSED)
 717                 return 0;
 718
 719         ret = hdev->ll_driver->parse(hdev);
 720         if (!ret)
 721                 hdev->status |= HID_STAT_PARSED;
 722
 723         return ret;
 724 }
 725
 726 /**
 727  * hid_hw_start - start underlaying HW
 728  *
 729  * @hdev: hid device
 730  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 731  *
 732  * Call this in probe function *after* hid_parse. This will setup HW buffers
 733  * and start the device (if not deffered to device open). hid_hw_stop must be
 734  * called if this was successfull.
 735  */
 736 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 737                 unsigned int connect_mask)
 738 {
 739         int ret = hdev->ll_driver->start(hdev);
 740         if (ret || !connect_mask)
 741                 return ret;
 742         ret = hid_connect(hdev, connect_mask);
 743         if (ret)
 744                 hdev->ll_driver->stop(hdev);
 745         return ret;
 746 }
 747
 748 /**
 749  * hid_hw_stop - stop underlaying HW
 750  *
 751  * @hdev: hid device
 752  *
 753  * This is usually called from remove function or from probe when something
 754  * failed and hid_hw_start was called already.
 755  */
 756 static inline void hid_hw_stop(struct hid_device *hdev)
 757 {
 758         hdev->ll_driver->stop(hdev);
 759 }
 760
 761 void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 762                 int interrupt);
 763
 764 extern int hid_generic_init(void);
 765 extern void hid_generic_exit(void);
 766
 767 /* HID quirks API */
 768 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 769 int usbhid_quirks_init(char **quirks_param);
 770 void usbhid_quirks_exit(void);
 771 void usbhid_set_leds(struct hid_device *hid);
 772
 773 #ifdef CONFIG_HID_PID
 774 int hid_pidff_init(struct hid_device *hid);
 775 #else
 776 #define hid_pidff_init NULL
 777 #endif
 778
 779 #ifdef CONFIG_HID_DEBUG
 780 #define dbg_hid(format, arg...) if (hid_debug) \
 781                                 printk(KERN_DEBUG "%s: " format ,\
 782                                 __FILE__ , ## arg)
 783 #define dbg_hid_line(format, arg...) if (hid_debug) \
 784                                 printk(format, ## arg)
 785 #else
 786 static inline int __attribute__((format(printf, 1, 2)))
 787 dbg_hid(const char *fmt, ...)
 788 {
 789         return 0;
 790 }
 791 #define dbg_hid_line dbg_hid
 792 #endif /* HID_DEBUG */
 793
 794 #define err_hid(format, arg...) printk(KERN_ERR "%s: " format "\n" , \
 795                 __FILE__ , ## arg)
 796 #endif /* HID_FF */
 797
 798 #ifdef CONFIG_HID_COMPAT
 799 #define HID_COMPAT_LOAD_DRIVER(name)    \
 800 void hid_compat_##name(void) { }        \
 801 EXPORT_SYMBOL(hid_compat_##name)
 802 #else
 803 #define HID_COMPAT_LOAD_DRIVER(name)
 804 #endif /* HID_COMPAT */
 805 #define HID_COMPAT_CALL_DRIVER(name)    do {    \
 806         extern void hid_compat_##name(void);    \
 807         hid_compat_##name();                    \
 808 } while (0)
 809
 810 #endif
 811