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
  35 /*
  36  * USB HID (Human Interface Device) interface class code
  37  */
  38
  39 #define USB_INTERFACE_CLASS_HID         3
  40
  41 /*
  42  * HID class requests
  43  */
  44
  45 #define HID_REQ_GET_REPORT              0x01
  46 #define HID_REQ_GET_IDLE                0x02
  47 #define HID_REQ_GET_PROTOCOL            0x03
  48 #define HID_REQ_SET_REPORT              0x09
  49 #define HID_REQ_SET_IDLE                0x0A
  50 #define HID_REQ_SET_PROTOCOL            0x0B
  51
  52 /*
  53  * HID class descriptor types
  54  */
  55
  56 #define HID_DT_HID                      (USB_TYPE_CLASS | 0x01)
  57 #define HID_DT_REPORT                   (USB_TYPE_CLASS | 0x02)
  58 #define HID_DT_PHYSICAL                 (USB_TYPE_CLASS | 0x03)
  59
  60 /*
  61  * We parse each description item into this structure. Short items data
  62  * values are expanded to 32-bit signed int, long items contain a pointer
  63  * into the data area.
  64  */
  65
  66 struct hid_item {
  67         unsigned  format;
  68         __u8      size;
  69         __u8      type;
  70         __u8      tag;
  71         union {
  72             __u8   u8;
  73             __s8   s8;
  74             __u16  u16;
  75             __s16  s16;
  76             __u32  u32;
  77             __s32  s32;
  78             __u8  *longdata;
  79         } data;
  80 };
  81
  82 /*
  83  * HID report item format
  84  */
  85
  86 #define HID_ITEM_FORMAT_SHORT   0
  87 #define HID_ITEM_FORMAT_LONG    1
  88
  89 /*
  90  * Special tag indicating long items
  91  */
  92
  93 #define HID_ITEM_TAG_LONG       15
  94
  95 /*
  96  * HID report descriptor item type (prefix bit 2,3)
  97  */
  98
  99 #define HID_ITEM_TYPE_MAIN              0
 100 #define HID_ITEM_TYPE_GLOBAL            1
 101 #define HID_ITEM_TYPE_LOCAL             2
 102 #define HID_ITEM_TYPE_RESERVED          3
 103
 104 /*
 105  * HID report descriptor main item tags
 106  */
 107
 108 #define HID_MAIN_ITEM_TAG_INPUT                 8
 109 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 110 #define HID_MAIN_ITEM_TAG_FEATURE               11
 111 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 112 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 113
 114 /*
 115  * HID report descriptor main item contents
 116  */
 117
 118 #define HID_MAIN_ITEM_CONSTANT          0x001
 119 #define HID_MAIN_ITEM_VARIABLE          0x002
 120 #define HID_MAIN_ITEM_RELATIVE          0x004
 121 #define HID_MAIN_ITEM_WRAP              0x008
 122 #define HID_MAIN_ITEM_NONLINEAR         0x010
 123 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 124 #define HID_MAIN_ITEM_NULL_STATE        0x040
 125 #define HID_MAIN_ITEM_VOLATILE          0x080
 126 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 127
 128 /*
 129  * HID report descriptor collection item types
 130  */
 131
 132 #define HID_COLLECTION_PHYSICAL         0
 133 #define HID_COLLECTION_APPLICATION      1
 134 #define HID_COLLECTION_LOGICAL          2
 135
 136 /*
 137  * HID report descriptor global item tags
 138  */
 139
 140 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 141 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 142 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 143 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 144 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 145 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 146 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 147 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 148 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 149 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 150 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 151 #define HID_GLOBAL_ITEM_TAG_POP                 11
 152
 153 /*
 154  * HID report descriptor local item tags
 155  */
 156
 157 #define HID_LOCAL_ITEM_TAG_USAGE                0
 158 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 159 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 160 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 161 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 162 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 163 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 164 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 165 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 166 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 167
 168 /*
 169  * HID usage tables
 170  */
 171
 172 #define HID_USAGE_PAGE          0xffff0000
 173
 174 #define HID_UP_GENDESK          0x00010000
 175 #define HID_UP_KEYBOARD         0x00070000
 176 #define HID_UP_LED              0x00080000
 177 #define HID_UP_BUTTON           0x00090000
 178 #define HID_UP_ORDINAL          0x000a0000
 179 #define HID_UP_CONSUMER         0x000c0000
 180 #define HID_UP_DIGITIZER        0x000d0000
 181 #define HID_UP_PID              0x000f0000
 182 #define HID_UP_HPVENDOR         0xff7f0000
 183
 184 #define HID_USAGE               0x0000ffff
 185
 186 #define HID_GD_POINTER          0x00010001
 187 #define HID_GD_MOUSE            0x00010002
 188 #define HID_GD_JOYSTICK         0x00010004
 189 #define HID_GD_GAMEPAD          0x00010005
 190 #define HID_GD_HATSWITCH        0x00010039
 191
 192 /*
 193  * HID report types --- Ouch! HID spec says 1 2 3!
 194  */
 195
 196 #define HID_INPUT_REPORT        0
 197 #define HID_OUTPUT_REPORT       1
 198 #define HID_FEATURE_REPORT      2
 199
 200 /*
 201  * HID device quirks.
 202  */
 203
 204 #define HID_QUIRK_INVERT                        0x001
 205 #define HID_QUIRK_NOTOUCH                       0x002
 206 #define HID_QUIRK_IGNORE                        0x004
 207 #define HID_QUIRK_NOGET                         0x008
 208 #define HID_QUIRK_HIDDEV                        0x010
 209 #define HID_QUIRK_BADPAD                        0x020
 210 #define HID_QUIRK_MULTI_INPUT                   0x040
 211 #define HID_QUIRK_2WHEEL_MOUSE_HACK_BACK        0x080
 212 #define HID_QUIRK_2WHEEL_MOUSE_HACK_EXTRA       0x100
 213 #define HID_QUIRK_2WHEEL_MOUSE_HACK_ON          0x200
 214
 215 /*
 216  * This is the global environment of the parser. This information is
 217  * persistent for main-items. The global environment can be saved and
 218  * restored with PUSH/POP statements.
 219  */
 220
 221 struct hid_global {
 222         unsigned usage_page;
 223         __s32    logical_minimum;
 224         __s32    logical_maximum;
 225         __s32    physical_minimum;
 226         __s32    physical_maximum;
 227         __s32    unit_exponent;
 228         unsigned unit;
 229         unsigned report_id;
 230         unsigned report_size;
 231         unsigned report_count;
 232 };
 233
 234 /*
 235  * This is the local environment. It is persistent up the next main-item.
 236  */
 237
 238 #define HID_MAX_DESCRIPTOR_SIZE         4096
 239 #define HID_MAX_USAGES                  1024
 240 #define HID_DEFAULT_NUM_COLLECTIONS     16
 241
 242 struct hid_local {
 243         unsigned usage[HID_MAX_USAGES]; /* usage array */
 244         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
 245         unsigned usage_index;
 246         unsigned usage_minimum;
 247         unsigned delimiter_depth;
 248         unsigned delimiter_branch;
 249 };
 250
 251 /*
 252  * This is the collection stack. We climb up the stack to determine
 253  * application and function of each field.
 254  */
 255
 256 struct hid_collection {
 257         unsigned type;
 258         unsigned usage;
 259         unsigned level;
 260 };
 261
 262 struct hid_usage {
 263         unsigned  hid;                  /* hid usage code */
 264         unsigned  collection_index;     /* index into collection array */
 265         __u16     code;                 /* input driver code */
 266         __u8      type;                 /* input driver type */
 267         __s8      hat_min;              /* hat switch fun */
 268         __s8      hat_max;              /* ditto */
 269 };
 270
 271 struct hid_field {
 272         unsigned  physical;             /* physical usage for this field */
 273         unsigned  logical;              /* logical usage for this field */
 274         unsigned  application;          /* application usage for this field */
 275         struct hid_usage *usage;        /* usage table for this function */
 276         unsigned  maxusage;             /* maximum usage index */
 277         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
 278         unsigned  report_offset;        /* bit offset in the report */
 279         unsigned  report_size;          /* size of this field in the report */
 280         unsigned  report_count;         /* number of this field in the report */
 281         unsigned  report_type;          /* (input,output,feature) */
 282         __s32    *value;                /* last known value(s) */
 283         __s32     logical_minimum;
 284         __s32     logical_maximum;
 285         __s32     physical_minimum;
 286         __s32     physical_maximum;
 287         __s32     unit_exponent;
 288         unsigned  unit;
 289         struct hid_report *report;      /* associated report */
 290         unsigned index;                 /* index into report->field[] */
 291 };
 292
 293 #define HID_MAX_FIELDS 64
 294
 295 struct hid_report {
 296         struct list_head list;
 297         unsigned id;                                    /* id of this report */
 298         unsigned type;                                  /* report type */
 299         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
 300         unsigned maxfield;                              /* maximum valid field index */
 301         unsigned size;                                  /* size of the report (bits) */
 302         struct hid_device *device;                      /* associated device */
 303 };
 304
 305 struct hid_report_enum {
 306         unsigned numbered;
 307         struct list_head report_list;
 308         struct hid_report *report_id_hash[256];
 309 };
 310
 311 #define HID_REPORT_TYPES 3
 312
 313 #define HID_BUFFER_SIZE         64              /* use 64 for compatibility with all possible packetlen */
 314 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
 315 #define HID_OUTPUT_FIFO_SIZE    64
 316
 317 struct hid_control_fifo {
 318         unsigned char dir;
 319         struct hid_report *report;
 320 };
 321
 322 #define HID_CLAIMED_INPUT       1
 323 #define HID_CLAIMED_HIDDEV      2
 324
 325 #define HID_CTRL_RUNNING        1
 326 #define HID_OUT_RUNNING         2
 327
 328 struct hid_input {
 329         struct list_head list;
 330         struct hid_report *report;
 331         struct input_dev input;
 332 };
 333
 334 struct hid_device {                                                     /* device report descriptor */
 335          __u8 *rdesc;
 336         unsigned rsize;
 337         struct hid_collection *collection;                              /* List of HID collections */
 338         unsigned collection_size;                                       /* Number of allocated hid_collections */
 339         unsigned maxcollection;                                         /* Number of parsed collections */
 340         unsigned maxapplication;                                        /* Number of applications */
 341         unsigned version;                                               /* HID version */
 342         unsigned country;                                               /* HID country */
 343         struct hid_report_enum report_enum[HID_REPORT_TYPES];
 344
 345         struct usb_device *dev;                                         /* USB device */
 346         struct usb_interface *intf;                                     /* USB interface */
 347         int ifnum;                                                      /* USB interface number */
 348
 349         unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
 350
 351         struct urb *urbin;                                              /* Input URB */
 352         char *inbuf;                                                    /* Input buffer */
 353         dma_addr_t inbuf_dma;                                           /* Input buffer dma */
 354
 355         struct urb *urbctrl;                                            /* Control URB */
 356         struct usb_ctrlrequest *cr;                                     /* Control request struct */
 357         dma_addr_t cr_dma;                                              /* Control request struct dma */
 358         struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE];            /* Control fifo */
 359         unsigned char ctrlhead, ctrltail;                               /* Control fifo head & tail */
 360         char *ctrlbuf;                                                  /* Control buffer */
 361         dma_addr_t ctrlbuf_dma;                                         /* Control buffer dma */
 362         spinlock_t ctrllock;                                            /* Control fifo spinlock */
 363
 364         struct urb *urbout;                                             /* Output URB */
 365         struct hid_report *out[HID_CONTROL_FIFO_SIZE];                  /* Output pipe fifo */
 366         unsigned char outhead, outtail;                                 /* Output pipe fifo head & tail */
 367         char *outbuf;                                                   /* Output buffer */
 368         dma_addr_t outbuf_dma;                                          /* Output buffer dma */
 369         spinlock_t outlock;                                             /* Output fifo spinlock */
 370
 371         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
 372         unsigned quirks;                                                /* Various quirks the device can pull on us */
 373
 374         struct list_head inputs;                                        /* The list of inputs */
 375         void *hiddev;                                                   /* The hiddev structure */
 376         int minor;                                                      /* Hiddev minor number */
 377
 378         wait_queue_head_t wait;                                         /* For sleeping */
 379
 380         int open;                                                       /* is the device open by anyone? */
 381         char name[128];                                                 /* Device name */
 382         char phys[64];                                                  /* Device physical location */
 383         char uniq[64];                                                  /* Device unique identifier (serial #) */
 384
 385         void *ff_private;                                               /* Private data for the force-feedback driver */
 386         void (*ff_exit)(struct hid_device*);                            /* Called by hid_exit_ff(hid) */
 387         int (*ff_event)(struct hid_device *hid, struct input_dev *input,
 388                         unsigned int type, unsigned int code, int value);
 389 };
 390
 391 #define HID_GLOBAL_STACK_SIZE 4
 392 #define HID_COLLECTION_STACK_SIZE 4
 393
 394 struct hid_parser {
 395         struct hid_global     global;
 396         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
 397         unsigned              global_stack_ptr;
 398         struct hid_local      local;
 399         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
 400         unsigned              collection_stack_ptr;
 401         struct hid_device    *device;
 402 };
 403
 404 struct hid_class_descriptor {
 405         __u8  bDescriptorType;
 406         __u16 wDescriptorLength;
 407 } __attribute__ ((packed));
 408
 409 struct hid_descriptor {
 410         __u8  bLength;
 411         __u8  bDescriptorType;
 412         __u16 bcdHID;
 413         __u8  bCountryCode;
 414         __u8  bNumDescriptors;
 415
 416         struct hid_class_descriptor desc[1];
 417 } __attribute__ ((packed));
 418
 419 #ifdef DEBUG
 420 #include "hid-debug.h"
 421 #else
 422 #define hid_dump_input(a,b)     do { } while (0)
 423 #define hid_dump_device(c)      do { } while (0)
 424 #define hid_dump_field(a,b)     do { } while (0)
 425 #define resolv_usage(a)         do { } while (0)
 426 #endif
 427
 428 #endif
 429
 430 #ifdef CONFIG_USB_HIDINPUT
 431 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 432 /* We ignore a few input applications that are not widely used */
 433 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || ( a == 0x00010080) || ( a == 0x000c0001))
 434 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32, struct pt_regs *regs);
 435 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 436 extern int hidinput_connect(struct hid_device *);
 437 extern void hidinput_disconnect(struct hid_device *);
 438 #else
 439 #define IS_INPUT_APPLICATION(a) (0)
 440 static inline void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value, struct pt_regs *regs) { }
 441 static inline void hidinput_report_event(struct hid_device *hid, struct hid_report *report) { }
 442 static inline int hidinput_connect(struct hid_device *hid) { return -ENODEV; }
 443 static inline void hidinput_disconnect(struct hid_device *hid) { }
 444 #endif
 445
 446 int hid_open(struct hid_device *);
 447 void hid_close(struct hid_device *);
 448 int hid_find_field(struct hid_device *, unsigned int, unsigned int, struct hid_field **);
 449 int hid_set_field(struct hid_field *, unsigned, __s32);
 450 void hid_submit_report(struct hid_device *, struct hid_report *, unsigned char dir);
 451 void hid_init_reports(struct hid_device *hid);
 452 int hid_find_report_by_usage(struct hid_device *hid, __u32 wanted_usage, struct hid_report **report, int type);
 453 int hid_wait_io(struct hid_device* hid);
 454
 455
 456 #ifdef CONFIG_HID_FF
 457 int hid_ff_init(struct hid_device *hid);
 458 #else
 459 static inline int hid_ff_init(struct hid_device *hid) { return -1; }
 460 #endif
 461 static inline void hid_ff_exit(struct hid_device *hid)
 462 {
 463         if (hid->ff_exit)
 464                 hid->ff_exit(hid);
 465 }
 466 static inline int hid_ff_event(struct hid_device *hid, struct input_dev *input,
 467                         unsigned int type, unsigned int code, int value)
 468 {
 469         if (hid->ff_event)
 470                 return hid->ff_event(hid, input, type, code, value);
 471         return -ENOSYS;
 472 }