drivers/usb/input/hid.h

   1 #ifndef __HID_H
   2 #define __HID_H
   3
   4 /*
   5  * $Id: hid.h,v 1.24 2001/12/27 10:37:41 vojtech Exp $
   6  *
   7  *  Copyright (c) 1999 Andreas Gal
   8  *  Copyright (c) 2000-2001 Vojtech Pavlik
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/slab.h>
  33 #include <linux/list.h>
  34 #include <linux/timer.h>
  35 #include <linux/workqueue.h>
  36
  37 /*
  38  * USB HID (Human Interface Device) interface class code
  39  */
  40
  41 #define USB_INTERFACE_CLASS_HID         3
  42
  43 /*
  44  * USB HID interface subclass and protocol codes
  45  */
  46
  47 #define USB_INTERFACE_SUBCLASS_BOOT     1
  48 #define USB_INTERFACE_PROTOCOL_KEYBOARD 1
  49 #define USB_INTERFACE_PROTOCOL_MOUSE    2
  50
  51 /*
  52  * HID class requests
  53  */
  54
  55 #define HID_REQ_GET_REPORT              0x01
  56 #define HID_REQ_GET_IDLE                0x02
  57 #define HID_REQ_GET_PROTOCOL            0x03
  58 #define HID_REQ_SET_REPORT              0x09
  59 #define HID_REQ_SET_IDLE                0x0A
  60 #define HID_REQ_SET_PROTOCOL            0x0B
  61
  62 /*
  63  * HID class descriptor types
  64  */
  65
  66 #define HID_DT_HID                      (USB_TYPE_CLASS | 0x01)
  67 #define HID_DT_REPORT                   (USB_TYPE_CLASS | 0x02)
  68 #define HID_DT_PHYSICAL                 (USB_TYPE_CLASS | 0x03)
  69
  70 /*
  71  * We parse each description item into this structure. Short items data
  72  * values are expanded to 32-bit signed int, long items contain a pointer
  73  * into the data area.
  74  */
  75
  76 struct hid_item {
  77         unsigned  format;
  78         __u8      size;
  79         __u8      type;
  80         __u8      tag;
  81         union {
  82             __u8   u8;
  83             __s8   s8;
  84             __u16  u16;
  85             __s16  s16;
  86             __u32  u32;
  87             __s32  s32;
  88             __u8  *longdata;
  89         } data;
  90 };
  91
  92 /*
  93  * HID report item format
  94  */
  95
  96 #define HID_ITEM_FORMAT_SHORT   0
  97 #define HID_ITEM_FORMAT_LONG    1
  98
  99 /*
 100  * Special tag indicating long items
 101  */
 102
 103 #define HID_ITEM_TAG_LONG       15
 104
 105 /*
 106  * HID report descriptor item type (prefix bit 2,3)
 107  */
 108
 109 #define HID_ITEM_TYPE_MAIN              0
 110 #define HID_ITEM_TYPE_GLOBAL            1
 111 #define HID_ITEM_TYPE_LOCAL             2
 112 #define HID_ITEM_TYPE_RESERVED          3
 113
 114 /*
 115  * HID report descriptor main item tags
 116  */
 117
 118 #define HID_MAIN_ITEM_TAG_INPUT                 8
 119 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 120 #define HID_MAIN_ITEM_TAG_FEATURE               11
 121 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 122 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 123
 124 /*
 125  * HID report descriptor main item contents
 126  */
 127
 128 #define HID_MAIN_ITEM_CONSTANT          0x001
 129 #define HID_MAIN_ITEM_VARIABLE          0x002
 130 #define HID_MAIN_ITEM_RELATIVE          0x004
 131 #define HID_MAIN_ITEM_WRAP              0x008
 132 #define HID_MAIN_ITEM_NONLINEAR         0x010
 133 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 134 #define HID_MAIN_ITEM_NULL_STATE        0x040
 135 #define HID_MAIN_ITEM_VOLATILE          0x080
 136 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 137
 138 /*
 139  * HID report descriptor collection item types
 140  */
 141
 142 #define HID_COLLECTION_PHYSICAL         0
 143 #define HID_COLLECTION_APPLICATION      1
 144 #define HID_COLLECTION_LOGICAL          2
 145
 146 /*
 147  * HID report descriptor global item tags
 148  */
 149
 150 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 151 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 152 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 153 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 154 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 155 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 156 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 157 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 158 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 159 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 160 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 161 #define HID_GLOBAL_ITEM_TAG_POP                 11
 162
 163 /*
 164  * HID report descriptor local item tags
 165  */
 166
 167 #define HID_LOCAL_ITEM_TAG_USAGE                0
 168 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 169 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 170 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 171 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 172 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 173 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 174 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 175 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 176 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 177
 178 /*
 179  * HID usage tables
 180  */
 181
 182 #define HID_USAGE_PAGE          0xffff0000
 183
 184 #define HID_UP_UNDEFINED        0x00000000
 185 #define HID_UP_GENDESK          0x00010000
 186 #define HID_UP_SIMULATION       0x00020000
 187 #define HID_UP_KEYBOARD         0x00070000
 188 #define HID_UP_LED              0x00080000
 189 #define HID_UP_BUTTON           0x00090000
 190 #define HID_UP_ORDINAL          0x000a0000
 191 #define HID_UP_CONSUMER         0x000c0000
 192 #define HID_UP_DIGITIZER        0x000d0000
 193 #define HID_UP_PID              0x000f0000
 194 #define HID_UP_HPVENDOR         0xff7f0000
 195 #define HID_UP_MSVENDOR         0xff000000
 196 #define HID_UP_CUSTOM           0x00ff0000
 197 #define HID_UP_LOGIVENDOR       0xffbc0000
 198
 199 #define HID_USAGE               0x0000ffff
 200
 201 #define HID_GD_POINTER          0x00010001
 202 #define HID_GD_MOUSE            0x00010002
 203 #define HID_GD_JOYSTICK         0x00010004
 204 #define HID_GD_GAMEPAD          0x00010005
 205 #define HID_GD_KEYBOARD         0x00010006
 206 #define HID_GD_KEYPAD           0x00010007
 207 #define HID_GD_MULTIAXIS        0x00010008
 208 #define HID_GD_X                0x00010030
 209 #define HID_GD_Y                0x00010031
 210 #define HID_GD_Z                0x00010032
 211 #define HID_GD_RX               0x00010033
 212 #define HID_GD_RY               0x00010034
 213 #define HID_GD_RZ               0x00010035
 214 #define HID_GD_SLIDER           0x00010036
 215 #define HID_GD_DIAL             0x00010037
 216 #define HID_GD_WHEEL            0x00010038
 217 #define HID_GD_HATSWITCH        0x00010039
 218 #define HID_GD_BUFFER           0x0001003a
 219 #define HID_GD_BYTECOUNT        0x0001003b
 220 #define HID_GD_MOTION           0x0001003c
 221 #define HID_GD_START            0x0001003d
 222 #define HID_GD_SELECT           0x0001003e
 223 #define HID_GD_VX               0x00010040
 224 #define HID_GD_VY               0x00010041
 225 #define HID_GD_VZ               0x00010042
 226 #define HID_GD_VBRX             0x00010043
 227 #define HID_GD_VBRY             0x00010044
 228 #define HID_GD_VBRZ             0x00010045
 229 #define HID_GD_VNO              0x00010046
 230 #define HID_GD_FEATURE          0x00010047
 231 #define HID_GD_UP               0x00010090
 232 #define HID_GD_DOWN             0x00010091
 233 #define HID_GD_RIGHT            0x00010092
 234 #define HID_GD_LEFT             0x00010093
 235
 236 /*
 237  * HID report types --- Ouch! HID spec says 1 2 3!
 238  */
 239
 240 #define HID_INPUT_REPORT        0
 241 #define HID_OUTPUT_REPORT       1
 242 #define HID_FEATURE_REPORT      2
 243
 244 /*
 245  * HID device quirks.
 246  */
 247
 248 #define HID_QUIRK_INVERT                        0x00000001
 249 #define HID_QUIRK_NOTOUCH                       0x00000002
 250 #define HID_QUIRK_IGNORE                        0x00000004
 251 #define HID_QUIRK_NOGET                         0x00000008
 252 #define HID_QUIRK_HIDDEV                        0x00000010
 253 #define HID_QUIRK_BADPAD                        0x00000020
 254 #define HID_QUIRK_MULTI_INPUT                   0x00000040
 255 #define HID_QUIRK_2WHEEL_MOUSE_HACK_7           0x00000080
 256 #define HID_QUIRK_2WHEEL_MOUSE_HACK_5           0x00000100
 257 #define HID_QUIRK_2WHEEL_MOUSE_HACK_ON          0x00000200
 258 #define HID_QUIRK_MIGHTYMOUSE                   0x00000400
 259 #define HID_QUIRK_CYMOTION                      0x00000800
 260 #define HID_QUIRK_POWERBOOK_HAS_FN              0x00001000
 261 #define HID_QUIRK_POWERBOOK_FN_ON               0x00002000
 262 #define HID_QUIRK_INVERT_HWHEEL                 0x00004000
 263
 264 /*
 265  * This is the global environment of the parser. This information is
 266  * persistent for main-items. The global environment can be saved and
 267  * restored with PUSH/POP statements.
 268  */
 269
 270 struct hid_global {
 271         unsigned usage_page;
 272         __s32    logical_minimum;
 273         __s32    logical_maximum;
 274         __s32    physical_minimum;
 275         __s32    physical_maximum;
 276         __s32    unit_exponent;
 277         unsigned unit;
 278         unsigned report_id;
 279         unsigned report_size;
 280         unsigned report_count;
 281 };
 282
 283 /*
 284  * This is the local environment. It is persistent up the next main-item.
 285  */
 286
 287 #define HID_MAX_DESCRIPTOR_SIZE         4096
 288 #define HID_MAX_USAGES                  1024
 289 #define HID_DEFAULT_NUM_COLLECTIONS     16
 290
 291 struct hid_local {
 292         unsigned usage[HID_MAX_USAGES]; /* usage array */
 293         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 294         unsigned usage_index;
 295         unsigned usage_minimum;
 296         unsigned delimiter_depth;
 297         unsigned delimiter_branch;
 298 };
 299
 300 /*
 301  * This is the collection stack. We climb up the stack to determine
 302  * application and function of each field.
 303  */
 304
 305 struct hid_collection {
 306         unsigned type;
 307         unsigned usage;
 308         unsigned level;
 309 };
 310
 311 struct hid_usage {
 312         unsigned  hid;                  /* hid usage code */
 313         unsigned  collection_index;     /* index into collection array */
 314         /* hidinput data */
 315         __u16     code;                 /* input driver code */
 316         __u8      type;                 /* input driver type */
 317         __s8      hat_min;              /* hat switch fun */
 318         __s8      hat_max;              /* ditto */
 319         __s8      hat_dir;              /* ditto */
 320 };
 321
 322 struct hid_input;
 323
 324 struct hid_field {
 325         unsigned  physical;             /* physical usage for this field */
 326         unsigned  logical;              /* logical usage for this field */
 327         unsigned  application;          /* application usage for this field */
 328         struct hid_usage *usage;        /* usage table for this function */
 329         unsigned  maxusage;             /* maximum usage index */
 330         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 331         unsigned  report_offset;        /* bit offset in the report */
 332         unsigned  report_size;          /* size of this field in the report */
 333         unsigned  report_count;         /* number of this field in the report */
 334         unsigned  report_type;          /* (input,output,feature) */
 335         __s32    *value;                /* last known value(s) */
 336         __s32     logical_minimum;
 337         __s32     logical_maximum;
 338         __s32     physical_minimum;
 339         __s32     physical_maximum;
 340         __s32     unit_exponent;
 341         unsigned  unit;
 342         struct hid_report *report;      /* associated report */
 343         unsigned index;                 /* index into report->field[] */
 344         /* hidinput data */
 345         struct hid_input *hidinput;     /* associated input structure */
 346         __u16 dpad;                     /* dpad input code */
 347 };
 348
 349 #define HID_MAX_FIELDS 64
 350
 351 struct hid_report {
 352         struct list_head list;
 353         unsigned id;                                    /* id of this report */
 354         unsigned type;                                  /* report type */
 355         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 356         unsigned maxfield;                              /* maximum valid field index */
 357         unsigned size;                                  /* size of the report (bits) */
 358         struct hid_device *device;                      /* associated device */
 359 };
 360
 361 struct hid_report_enum {
 362         unsigned numbered;
 363         struct list_head report_list;
 364         struct hid_report *report_id_hash[256];
 365 };
 366
 367 #define HID_REPORT_TYPES 3
 368
 369 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
 370 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
 371 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 372 #define HID_OUTPUT_FIFO_SIZE    64
 373
 374 struct hid_control_fifo {
 375         unsigned char dir;
 376         struct hid_report *report;
 377 };
 378
 379 #define HID_CLAIMED_INPUT       1
 380 #define HID_CLAIMED_HIDDEV      2
 381
 382 #define HID_CTRL_RUNNING        1
 383 #define HID_OUT_RUNNING         2
 384 #define HID_IN_RUNNING          3
 385 #define HID_RESET_PENDING       4
 386 #define HID_SUSPENDED           5
 387
 388 struct hid_input {
 389         struct list_head list;
 390         struct hid_report *report;
 391         struct input_dev *input;
 392 };
 393
 394 struct hid_device {                                                     /* device report descriptor */
 395          __u8 *rdesc;
 396         unsigned rsize;
 397         struct hid_collection *collection;                              /* List of HID collections */
 398         unsigned collection_size;                                       /* Number of allocated hid_collections */
 399         unsigned maxcollection;                                         /* Number of parsed collections */
 400         unsigned maxapplication;                                        /* Number of applications */
 401         unsigned version;                                               /* HID version */
 402         unsigned country;                                               /* HID country */
 403         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 404
 405         struct usb_device *dev;                                         /* USB device */
 406         struct usb_interface *intf;                                     /* USB interface */
 407         int ifnum;                                                      /* USB interface number */
 408
 409         unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
 410         struct timer_list io_retry;                                     /* Retry timer */
 411         unsigned long stop_retry;                                       /* Time to give up, in jiffies */
 412         unsigned int retry_delay;                                       /* Delay length in ms */
 413         struct work_struct reset_work;                                  /* Task context for resets */
 414
 415         unsigned int bufsize;                                           /* URB buffer size */
 416
 417         struct urb *urbin;                                              /* Input URB */
 418         char *inbuf;                                                    /* Input buffer */
 419         dma_addr_t inbuf_dma;                                           /* Input buffer dma */
 420         spinlock_t inlock;                                              /* Input fifo spinlock */
 421
 422         struct urb *urbctrl;                                            /* Control URB */
 423         struct usb_ctrlrequest *cr;                                     /* Control request struct */
 424         dma_addr_t cr_dma;                                              /* Control request struct dma */
 425         struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE];            /* Control fifo */
 426         unsigned char ctrlhead, ctrltail;                               /* Control fifo head & tail */
 427         char *ctrlbuf;                                                  /* Control buffer */
 428         dma_addr_t ctrlbuf_dma;                                         /* Control buffer dma */
 429         spinlock_t ctrllock;                                            /* Control fifo spinlock */
 430
 431         struct urb *urbout;                                             /* Output URB */
 432         struct hid_report *out[HID_CONTROL_FIFO_SIZE];                  /* Output pipe fifo */
 433         unsigned char outhead, outtail;                                 /* Output pipe fifo head & tail */
 434         char *outbuf;                                                   /* Output buffer */
 435         dma_addr_t outbuf_dma;                                          /* Output buffer dma */
 436         spinlock_t outlock;                                             /* Output fifo spinlock */
 437
 438         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 439         unsigned quirks;                                                /* Various quirks the device can pull on us */
 440
 441         struct list_head inputs;                                        /* The list of inputs */
 442         void *hiddev;                                                   /* The hiddev structure */
 443         int minor;                                                      /* Hiddev minor number */
 444
 445         wait_queue_head_t wait;                                         /* For sleeping */
 446
 447         int open;                                                       /* is the device open by anyone? */
 448         char name[128];                                                 /* Device name */
 449         char phys[64];                                                  /* Device physical location */
 450         char uniq[64];                                                  /* Device unique identifier (serial #) */
 451
 452         void *ff_private;                                               /* Private data for the force-feedback driver */
 453         void (*ff_exit)(struct hid_device*);                            /* Called by hid_exit_ff(hid) */
 454         int (*ff_event)(struct hid_device *hid, struct input_dev *input,
 455                         unsigned int type, unsigned int code, int value);
 456
 457 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
 458         unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
 459         unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
 460 #endif
 461 };
 462
 463 #define HID_GLOBAL_STACK_SIZE 4
 464 #define HID_COLLECTION_STACK_SIZE 4
 465
 466 struct hid_parser {
 467         struct hid_global     global;
 468         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 469         unsigned              global_stack_ptr;
 470         struct hid_local      local;
 471         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 472         unsigned              collection_stack_ptr;
 473         struct hid_device    *device;
 474 };
 475
 476 struct hid_class_descriptor {
 477         __u8  bDescriptorType;
 478         __u16 wDescriptorLength;
 479 } __attribute__ ((packed));
 480
 481 struct hid_descriptor {
 482         __u8  bLength;
 483         __u8  bDescriptorType;
 484         __u16 bcdHID;
 485         __u8  bCountryCode;
 486         __u8  bNumDescriptors;
 487
 488         struct hid_class_descriptor desc[1];
 489 } __attribute__ ((packed));
 490
 491 #ifdef DEBUG
 492 #include "hid-debug.h"
 493 #else
 494 #define hid_dump_input(a,b)     do { } while (0)
 495 #define hid_dump_device(c)      do { } while (0)
 496 #define hid_dump_field(a,b)     do { } while (0)
 497 #define resolv_usage(a)         do { } while (0)
 498 #define resolv_event(a,b)       do { } while (0)
 499 #endif
 500
 501 #endif
 502
 503 #ifdef CONFIG_USB_HIDINPUT
 504 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 505 /* We ignore a few input applications that are not widely used */
 506 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001))
 507 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32, struct pt_regs *regs);
 508 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 509 extern int hidinput_connect(struct hid_device *);
 510 extern void hidinput_disconnect(struct hid_device *);
 511 #else
 512 #define IS_INPUT_APPLICATION(a) (0)
 513 static inline void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value, struct pt_regs *regs) { }
 514 static inline void hidinput_report_event(struct hid_device *hid, struct hid_report *report) { }
 515 static inline int hidinput_connect(struct hid_device *hid) { return -ENODEV; }
 516 static inline void hidinput_disconnect(struct hid_device *hid) { }
 517 #endif
 518
 519 int hid_open(struct hid_device *);
 520 void hid_close(struct hid_device *);
 521 int hid_set_field(struct hid_field *, unsigned, __s32);
 522 void hid_submit_report(struct hid_device *, struct hid_report *, unsigned char dir);
 523 void hid_init_reports(struct hid_device *hid);
 524 struct hid_field *hid_find_field_by_usage(struct hid_device *hid, __u32 wanted_usage, int type);
 525 int hid_wait_io(struct hid_device* hid);
 526
 527
 528 #ifdef CONFIG_HID_FF
 529 int hid_ff_init(struct hid_device *hid);
 530 #else
 531 static inline int hid_ff_init(struct hid_device *hid) { return -1; }
 532 #endif
 533 static inline void hid_ff_exit(struct hid_device *hid)
 534 {
 535         if (hid->ff_exit)
 536                 hid->ff_exit(hid);
 537 }
 538 static inline int hid_ff_event(struct hid_device *hid, struct input_dev *input,
 539                         unsigned int type, unsigned int code, int value)
 540 {
 541         if (hid->ff_event)
 542                 return hid->ff_event(hid, input, type, code, value);
 543         return -ENOSYS;
 544 }
 545
 546 int hid_lgff_init(struct hid_device* hid);
 547 int hid_tmff_init(struct hid_device* hid);
 548 int hid_pid_init(struct hid_device* hid);
 549