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   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
 414 struct hid_input {
 415         struct list_head list;
 416         struct hid_report *report;
 417         struct input_dev *input;
 418 };
 419
 420 struct hid_driver;
 421 struct hid_ll_driver;
 422
 423 struct hid_device {                                                     /* device report descriptor */
 424         __u8 *rdesc;
 425         unsigned rsize;
 426         struct hid_collection *collection;                              /* List of HID collections */
 427         unsigned collection_size;                                       /* Number of allocated hid_collections */
 428         unsigned maxcollection;                                         /* Number of parsed collections */
 429         unsigned maxapplication;                                        /* Number of applications */
 430         __u16 bus;                                                      /* BUS ID */
 431         __u32 vendor;                                                   /* Vendor ID */
 432         __u32 product;                                                  /* Product ID */
 433         __u32 version;                                                  /* HID version */
 434         unsigned country;                                               /* HID country */
 435         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 436
 437         struct device dev;                                              /* device */
 438         struct hid_driver *driver;
 439         struct hid_ll_driver *ll_driver;
 440
 441         unsigned int status;                                            /* see STAT flags above */
 442         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 443         unsigned quirks;                                                /* Various quirks the device can pull on us */
 444
 445         struct list_head inputs;                                        /* The list of inputs */
 446         void *hiddev;                                                   /* The hiddev structure */
 447         void *hidraw;
 448         int minor;                                                      /* Hiddev minor number */
 449
 450         int open;                                                       /* is the device open by anyone? */
 451         char name[128];                                                 /* Device name */
 452         char phys[64];                                                  /* Device physical location */
 453         char uniq[64];                                                  /* Device unique identifier (serial #) */
 454
 455         void *driver_data;
 456
 457         /* temporary hid_ff handling (until moved to the drivers) */
 458         int (*ff_init)(struct hid_device *);
 459
 460         /* hiddev event handler */
 461         int (*hiddev_connect)(struct hid_device *, unsigned int);
 462         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
 463                                   struct hid_usage *, __s32);
 464         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 465
 466         /* handler for raw output data, used by hidraw */
 467         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t);
 468 };
 469
 470 static inline void *hid_get_drvdata(struct hid_device *hdev)
 471 {
 472         return dev_get_drvdata(&hdev->dev);
 473 }
 474
 475 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 476 {
 477         dev_set_drvdata(&hdev->dev, data);
 478 }
 479
 480 #define HID_GLOBAL_STACK_SIZE 4
 481 #define HID_COLLECTION_STACK_SIZE 4
 482
 483 struct hid_parser {
 484         struct hid_global     global;
 485         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 486         unsigned              global_stack_ptr;
 487         struct hid_local      local;
 488         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 489         unsigned              collection_stack_ptr;
 490         struct hid_device    *device;
 491 };
 492
 493 struct hid_class_descriptor {
 494         __u8  bDescriptorType;
 495         __le16 wDescriptorLength;
 496 } __attribute__ ((packed));
 497
 498 struct hid_descriptor {
 499         __u8  bLength;
 500         __u8  bDescriptorType;
 501         __le16 bcdHID;
 502         __u8  bCountryCode;
 503         __u8  bNumDescriptors;
 504
 505         struct hid_class_descriptor desc[1];
 506 } __attribute__ ((packed));
 507
 508 #define HID_DEVICE(b, ven, prod) \
 509         .bus = (b), \
 510         .vendor = (ven), .product = (prod)
 511
 512 #define HID_USB_DEVICE(ven, prod)       HID_DEVICE(BUS_USB, ven, prod)
 513 #define HID_BLUETOOTH_DEVICE(ven, prod) HID_DEVICE(BUS_BLUETOOTH, ven, prod)
 514
 515 #define HID_REPORT_ID(rep) \
 516         .report_type = (rep)
 517 #define HID_USAGE_ID(uhid, utype, ucode) \
 518         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
 519 /* we don't want to catch types and codes equal to 0 */
 520 #define HID_TERMINATOR          (HID_ANY_ID - 1)
 521
 522 struct hid_report_id {
 523         __u32 report_type;
 524 };
 525 struct hid_usage_id {
 526         __u32 usage_hid;
 527         __u32 usage_type;
 528         __u32 usage_code;
 529 };
 530
 531 /**
 532  * struct hid_driver
 533  * @name: driver name (e.g. "Footech_bar-wheel")
 534  * @id_table: which devices is this driver for (must be non-NULL for probe
 535  *            to be called)
 536  * @probe: new device inserted
 537  * @remove: device removed (NULL if not a hot-plug capable driver)
 538  * @report_table: on which reports to call raw_event (NULL means all)
 539  * @raw_event: if report in report_table, this hook is called (NULL means nop)
 540  * @usage_table: on which events to call event (NULL means all)
 541  * @event: if usage in usage_table, this hook is called (NULL means nop)
 542  * @report_fixup: called before report descriptor parsing (NULL means nop)
 543  * @input_mapping: invoked on input registering before mapping an usage
 544  * @input_mapped: invoked on input registering after mapping an usage
 545  *
 546  * raw_event and event should return 0 on no action performed, 1 when no
 547  * further processing should be done and negative on error
 548  *
 549  * input_mapping shall return a negative value to completely ignore this usage
 550  * (e.g. doubled or invalid usage), zero to continue with parsing of this
 551  * usage by generic code (no special handling needed) or positive to skip
 552  * generic parsing (needed special handling which was done in the hook already)
 553  * input_mapped shall return negative to inform the layer that this usage
 554  * should not be considered for further processing or zero to notify that
 555  * no processing was performed and should be done in a generic manner
 556  * Both these functions may be NULL which means the same behavior as returning
 557  * zero from them.
 558  */
 559 struct hid_driver {
 560         char *name;
 561         const struct hid_device_id *id_table;
 562
 563         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
 564         void (*remove)(struct hid_device *dev);
 565
 566         const struct hid_report_id *report_table;
 567         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
 568                         u8 *data, int size);
 569         const struct hid_usage_id *usage_table;
 570         int (*event)(struct hid_device *hdev, struct hid_field *field,
 571                         struct hid_usage *usage, __s32 value);
 572
 573         void (*report_fixup)(struct hid_device *hdev, __u8 *buf,
 574                         unsigned int size);
 575
 576         int (*input_mapping)(struct hid_device *hdev,
 577                         struct hid_input *hidinput, struct hid_field *field,
 578                         struct hid_usage *usage, unsigned long **bit, int *max);
 579         int (*input_mapped)(struct hid_device *hdev,
 580                         struct hid_input *hidinput, struct hid_field *field,
 581                         struct hid_usage *usage, unsigned long **bit, int *max);
 582 /* private: */
 583         struct device_driver driver;
 584 };
 585
 586 /**
 587  * hid_ll_driver - low level driver callbacks
 588  * @start: called on probe to start the device
 589  * @stop: called on remove
 590  * @open: called by input layer on open
 591  * @close: called by input layer on close
 592  * @hidinput_input_event: event input event (e.g. ff or leds)
 593  * @parse: this method is called only once to parse the device data,
 594  *         shouldn't allocate anything to not leak memory
 595  */
 596 struct hid_ll_driver {
 597         int (*start)(struct hid_device *hdev);
 598         void (*stop)(struct hid_device *hdev);
 599
 600         int (*open)(struct hid_device *hdev);
 601         void (*close)(struct hid_device *hdev);
 602
 603         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 604                         unsigned int code, int value);
 605
 606         int (*parse)(struct hid_device *hdev);
 607 };
 608
 609 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 610 /* We ignore a few input applications that are not widely used */
 611 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || (a == 0x000d0002))
 612
 613 /* HID core API */
 614
 615 #ifdef CONFIG_HID_DEBUG
 616 extern int hid_debug;
 617 #endif
 618
 619 extern int hid_add_device(struct hid_device *);
 620 extern void hid_destroy_device(struct hid_device *);
 621
 622 extern int __must_check __hid_register_driver(struct hid_driver *,
 623                 struct module *, const char *mod_name);
 624 static inline int __must_check hid_register_driver(struct hid_driver *driver)
 625 {
 626         return __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
 627 }
 628 extern void hid_unregister_driver(struct hid_driver *);
 629
 630 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
 631 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 632 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 633 extern void hidinput_disconnect(struct hid_device *);
 634
 635 int hid_set_field(struct hid_field *, unsigned, __s32);
 636 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 637 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 638 void hid_output_report(struct hid_report *report, __u8 *data);
 639 struct hid_device *hid_allocate_device(void);
 640 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 641 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 642
 643 /**
 644  * hid_map_usage - map usage input bits
 645  *
 646  * @hidinput: hidinput which we are interested in
 647  * @usage: usage to fill in
 648  * @bit: pointer to input->{}bit (out parameter)
 649  * @max: maximal valid usage->code to consider later (out parameter)
 650  * @type: input event type (EV_KEY, EV_REL, ...)
 651  * @c: code which corresponds to this usage and type
 652  */
 653 static inline void hid_map_usage(struct hid_input *hidinput,
 654                 struct hid_usage *usage, unsigned long **bit, int *max,
 655                 __u8 type, __u16 c)
 656 {
 657         struct input_dev *input = hidinput->input;
 658
 659         usage->type = type;
 660         usage->code = c;
 661
 662         switch (type) {
 663         case EV_ABS:
 664                 *bit = input->absbit;
 665                 *max = ABS_MAX;
 666                 break;
 667         case EV_REL:
 668                 *bit = input->relbit;
 669                 *max = REL_MAX;
 670                 break;
 671         case EV_KEY:
 672                 *bit = input->keybit;
 673                 *max = KEY_MAX;
 674                 break;
 675         case EV_LED:
 676                 *bit = input->ledbit;
 677                 *max = LED_MAX;
 678                 break;
 679         }
 680 }
 681
 682 /**
 683  * hid_map_usage_clear - map usage input bits and clear the input bit
 684  *
 685  * The same as hid_map_usage, except the @c bit is also cleared in supported
 686  * bits (@bit).
 687  */
 688 static inline void hid_map_usage_clear(struct hid_input *hidinput,
 689                 struct hid_usage *usage, unsigned long **bit, int *max,
 690                 __u8 type, __u16 c)
 691 {
 692         hid_map_usage(hidinput, usage, bit, max, type, c);
 693         clear_bit(c, *bit);
 694 }
 695
 696 /**
 697  * hid_parse - parse HW reports
 698  *
 699  * @hdev: hid device
 700  *
 701  * Call this from probe after you set up the device (if needed). Your
 702  * report_fixup will be called (if non-NULL) after reading raw report from
 703  * device before passing it to hid layer for real parsing.
 704  */
 705 static inline int __must_check hid_parse(struct hid_device *hdev)
 706 {
 707         int ret;
 708
 709         if (hdev->status & HID_STAT_PARSED)
 710                 return 0;
 711
 712         ret = hdev->ll_driver->parse(hdev);
 713         if (!ret)
 714                 hdev->status |= HID_STAT_PARSED;
 715
 716         return ret;
 717 }
 718
 719 /**
 720  * hid_hw_start - start underlaying HW
 721  *
 722  * @hdev: hid device
 723  * @connect_mask: which outputs to connect, see HID_CONNECT_*
 724  *
 725  * Call this in probe function *after* hid_parse. This will setup HW buffers
 726  * and start the device (if not deffered to device open). hid_hw_stop must be
 727  * called if this was successfull.
 728  */
 729 static inline int __must_check hid_hw_start(struct hid_device *hdev,
 730                 unsigned int connect_mask)
 731 {
 732         int ret = hdev->ll_driver->start(hdev);
 733         if (ret || !connect_mask)
 734                 return ret;
 735         ret = hid_connect(hdev, connect_mask);
 736         if (ret)
 737                 hdev->ll_driver->stop(hdev);
 738         return ret;
 739 }
 740
 741 /**
 742  * hid_hw_stop - stop underlaying HW
 743  *
 744  * @hdev: hid device
 745  *
 746  * This is usually called from remove function or from probe when something
 747  * failed and hid_hw_start was called already.
 748  */
 749 static inline void hid_hw_stop(struct hid_device *hdev)
 750 {
 751         hdev->ll_driver->stop(hdev);
 752 }
 753
 754 void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 755                 int interrupt);
 756
 757 extern int hid_generic_init(void);
 758 extern void hid_generic_exit(void);
 759
 760 /* HID quirks API */
 761 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
 762 int usbhid_quirks_init(char **quirks_param);
 763 void usbhid_quirks_exit(void);
 764 void usbhid_set_leds(struct hid_device *hid);
 765
 766 #ifdef CONFIG_HID_PID
 767 int hid_pidff_init(struct hid_device *hid);
 768 #else
 769 #define hid_pidff_init NULL
 770 #endif
 771
 772 #ifdef CONFIG_HID_DEBUG
 773 #define dbg_hid(format, arg...) if (hid_debug) \
 774                                 printk(KERN_DEBUG "%s: " format ,\
 775                                 __FILE__ , ## arg)
 776 #define dbg_hid_line(format, arg...) if (hid_debug) \
 777                                 printk(format, ## arg)
 778 #else
 779 static inline int __attribute__((format(printf, 1, 2)))
 780 dbg_hid(const char *fmt, ...)
 781 {
 782         return 0;
 783 }
 784 #define dbg_hid_line dbg_hid
 785 #endif /* HID_DEBUG */
 786
 787 #define err_hid(format, arg...) printk(KERN_ERR "%s: " format "\n" , \
 788                 __FILE__ , ## arg)
 789 #endif /* HID_FF */
 790
 791 #ifdef CONFIG_HID_COMPAT
 792 #define HID_COMPAT_LOAD_DRIVER(name)    \
 793 void hid_compat_##name(void) { }        \
 794 EXPORT_SYMBOL(hid_compat_##name)
 795 #else
 796 #define HID_COMPAT_LOAD_DRIVER(name)
 797 #endif /* HID_COMPAT */
 798 #define HID_COMPAT_CALL_DRIVER(name)    do {    \
 799         extern void hid_compat_##name(void);    \
 800         hid_compat_##name();                    \
 801 } while (0)
 802
 803 #endif
 804