HID: fix race between open() and disconnect() in usbhid
[linux-2.6.git] / include / linux / 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  *  Copyright (c) 2006-2007 Jiri Kosina
10  */
11
12 /*
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26  *
27  * Should you need to contact me, the author, you can do so either by
28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30  */
31
32 /*
33  * USB HID (Human Interface Device) interface class code
34  */
35
36 #define USB_INTERFACE_CLASS_HID         3
37
38 /*
39  * USB HID interface subclass and protocol codes
40  */
41
42 #define USB_INTERFACE_SUBCLASS_BOOT     1
43 #define USB_INTERFACE_PROTOCOL_KEYBOARD 1
44 #define USB_INTERFACE_PROTOCOL_MOUSE    2
45
46 /*
47  * HID class requests
48  */
49
50 #define HID_REQ_GET_REPORT              0x01
51 #define HID_REQ_GET_IDLE                0x02
52 #define HID_REQ_GET_PROTOCOL            0x03
53 #define HID_REQ_SET_REPORT              0x09
54 #define HID_REQ_SET_IDLE                0x0A
55 #define HID_REQ_SET_PROTOCOL            0x0B
56
57 /*
58  * HID class descriptor types
59  */
60
61 #define HID_DT_HID                      (USB_TYPE_CLASS | 0x01)
62 #define HID_DT_REPORT                   (USB_TYPE_CLASS | 0x02)
63 #define HID_DT_PHYSICAL                 (USB_TYPE_CLASS | 0x03)
64
65 #define HID_MAX_DESCRIPTOR_SIZE         4096
66
67 #ifdef __KERNEL__
68
69 #include <linux/types.h>
70 #include <linux/slab.h>
71 #include <linux/list.h>
72 #include <linux/timer.h>
73 #include <linux/workqueue.h>
74 #include <linux/input.h>
75
76 /*
77  * We parse each description item into this structure. Short items data
78  * values are expanded to 32-bit signed int, long items contain a pointer
79  * into the data area.
80  */
81
82 struct hid_item {
83         unsigned  format;
84         __u8      size;
85         __u8      type;
86         __u8      tag;
87         union {
88             __u8   u8;
89             __s8   s8;
90             __u16  u16;
91             __s16  s16;
92             __u32  u32;
93             __s32  s32;
94             __u8  *longdata;
95         } data;
96 };
97
98 /*
99  * HID report item format
100  */
101
102 #define HID_ITEM_FORMAT_SHORT   0
103 #define HID_ITEM_FORMAT_LONG    1
104
105 /*
106  * Special tag indicating long items
107  */
108
109 #define HID_ITEM_TAG_LONG       15
110
111 /*
112  * HID report descriptor item type (prefix bit 2,3)
113  */
114
115 #define HID_ITEM_TYPE_MAIN              0
116 #define HID_ITEM_TYPE_GLOBAL            1
117 #define HID_ITEM_TYPE_LOCAL             2
118 #define HID_ITEM_TYPE_RESERVED          3
119
120 /*
121  * HID report descriptor main item tags
122  */
123
124 #define HID_MAIN_ITEM_TAG_INPUT                 8
125 #define HID_MAIN_ITEM_TAG_OUTPUT                9
126 #define HID_MAIN_ITEM_TAG_FEATURE               11
127 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
128 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
129
130 /*
131  * HID report descriptor main item contents
132  */
133
134 #define HID_MAIN_ITEM_CONSTANT          0x001
135 #define HID_MAIN_ITEM_VARIABLE          0x002
136 #define HID_MAIN_ITEM_RELATIVE          0x004
137 #define HID_MAIN_ITEM_WRAP              0x008
138 #define HID_MAIN_ITEM_NONLINEAR         0x010
139 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
140 #define HID_MAIN_ITEM_NULL_STATE        0x040
141 #define HID_MAIN_ITEM_VOLATILE          0x080
142 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
143
144 /*
145  * HID report descriptor collection item types
146  */
147
148 #define HID_COLLECTION_PHYSICAL         0
149 #define HID_COLLECTION_APPLICATION      1
150 #define HID_COLLECTION_LOGICAL          2
151
152 /*
153  * HID report descriptor global item tags
154  */
155
156 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
157 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
158 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
159 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
160 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
161 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
162 #define HID_GLOBAL_ITEM_TAG_UNIT                6
163 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
164 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
165 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
166 #define HID_GLOBAL_ITEM_TAG_PUSH                10
167 #define HID_GLOBAL_ITEM_TAG_POP                 11
168
169 /*
170  * HID report descriptor local item tags
171  */
172
173 #define HID_LOCAL_ITEM_TAG_USAGE                0
174 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
175 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
176 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
177 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
178 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
179 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
180 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
181 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
182 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
183
184 /*
185  * HID usage tables
186  */
187
188 #define HID_USAGE_PAGE          0xffff0000
189
190 #define HID_UP_UNDEFINED        0x00000000
191 #define HID_UP_GENDESK          0x00010000
192 #define HID_UP_SIMULATION       0x00020000
193 #define HID_UP_KEYBOARD         0x00070000
194 #define HID_UP_LED              0x00080000
195 #define HID_UP_BUTTON           0x00090000
196 #define HID_UP_ORDINAL          0x000a0000
197 #define HID_UP_CONSUMER         0x000c0000
198 #define HID_UP_DIGITIZER        0x000d0000
199 #define HID_UP_PID              0x000f0000
200 #define HID_UP_HPVENDOR         0xff7f0000
201 #define HID_UP_MSVENDOR         0xff000000
202 #define HID_UP_CUSTOM           0x00ff0000
203 #define HID_UP_LOGIVENDOR       0xffbc0000
204
205 #define HID_USAGE               0x0000ffff
206
207 #define HID_GD_POINTER          0x00010001
208 #define HID_GD_MOUSE            0x00010002
209 #define HID_GD_JOYSTICK         0x00010004
210 #define HID_GD_GAMEPAD          0x00010005
211 #define HID_GD_KEYBOARD         0x00010006
212 #define HID_GD_KEYPAD           0x00010007
213 #define HID_GD_MULTIAXIS        0x00010008
214 #define HID_GD_X                0x00010030
215 #define HID_GD_Y                0x00010031
216 #define HID_GD_Z                0x00010032
217 #define HID_GD_RX               0x00010033
218 #define HID_GD_RY               0x00010034
219 #define HID_GD_RZ               0x00010035
220 #define HID_GD_SLIDER           0x00010036
221 #define HID_GD_DIAL             0x00010037
222 #define HID_GD_WHEEL            0x00010038
223 #define HID_GD_HATSWITCH        0x00010039
224 #define HID_GD_BUFFER           0x0001003a
225 #define HID_GD_BYTECOUNT        0x0001003b
226 #define HID_GD_MOTION           0x0001003c
227 #define HID_GD_START            0x0001003d
228 #define HID_GD_SELECT           0x0001003e
229 #define HID_GD_VX               0x00010040
230 #define HID_GD_VY               0x00010041
231 #define HID_GD_VZ               0x00010042
232 #define HID_GD_VBRX             0x00010043
233 #define HID_GD_VBRY             0x00010044
234 #define HID_GD_VBRZ             0x00010045
235 #define HID_GD_VNO              0x00010046
236 #define HID_GD_FEATURE          0x00010047
237 #define HID_GD_UP               0x00010090
238 #define HID_GD_DOWN             0x00010091
239 #define HID_GD_RIGHT            0x00010092
240 #define HID_GD_LEFT             0x00010093
241
242 /*
243  * HID report types --- Ouch! HID spec says 1 2 3!
244  */
245
246 #define HID_INPUT_REPORT        0
247 #define HID_OUTPUT_REPORT       1
248 #define HID_FEATURE_REPORT      2
249
250 /*
251  * HID device quirks.
252  */
253
254 /* 
255  * Increase this if you need to configure more HID quirks at module load time
256  */
257 #define MAX_USBHID_BOOT_QUIRKS 4
258
259 #define HID_QUIRK_INVERT                        0x00000001
260 #define HID_QUIRK_NOTOUCH                       0x00000002
261 #define HID_QUIRK_IGNORE                        0x00000004
262 #define HID_QUIRK_NOGET                         0x00000008
263 #define HID_QUIRK_HIDDEV                        0x00000010
264 #define HID_QUIRK_BADPAD                        0x00000020
265 #define HID_QUIRK_MULTI_INPUT                   0x00000040
266 #define HID_QUIRK_2WHEEL_MOUSE_HACK_7           0x00000080
267 #define HID_QUIRK_2WHEEL_MOUSE_HACK_5           0x00000100
268 #define HID_QUIRK_2WHEEL_MOUSE_HACK_ON          0x00000200
269 #define HID_QUIRK_MIGHTYMOUSE                   0x00000400
270 #define HID_QUIRK_APPLE_HAS_FN                  0x00000800
271 #define HID_QUIRK_APPLE_FN_ON                   0x00001000
272 #define HID_QUIRK_INVERT_HWHEEL                 0x00002000
273 #define HID_QUIRK_APPLE_ISO_KEYBOARD            0x00004000
274 #define HID_QUIRK_BAD_RELATIVE_KEYS             0x00008000
275 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
276 #define HID_QUIRK_IGNORE_MOUSE                  0x00020000
277 #define HID_QUIRK_SONY_PS3_CONTROLLER           0x00040000
278 #define HID_QUIRK_DUPLICATE_USAGES              0x00080000
279 #define HID_QUIRK_RESET_LEDS                    0x00100000
280 #define HID_QUIRK_HIDINPUT                      0x00200000
281 #define HID_QUIRK_LOGITECH_IGNORE_DOUBLED_WHEEL 0x00400000
282 #define HID_QUIRK_LOGITECH_EXPANDED_KEYMAP      0x00800000
283 #define HID_QUIRK_IGNORE_HIDINPUT               0x01000000
284 #define HID_QUIRK_2WHEEL_MOUSE_HACK_B8          0x02000000
285 #define HID_QUIRK_HWHEEL_WHEEL_INVERT           0x04000000
286 #define HID_QUIRK_MICROSOFT_KEYS                0x08000000
287 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
288
289 /*
290  * Separate quirks for runtime report descriptor fixup
291  */
292
293 #define HID_QUIRK_RDESC_CYMOTION                0x00000001
294 #define HID_QUIRK_RDESC_LOGITECH                0x00000002
295 #define HID_QUIRK_RDESC_SWAPPED_MIN_MAX         0x00000004
296 #define HID_QUIRK_RDESC_PETALYNX                0x00000008
297 #define HID_QUIRK_RDESC_MACBOOK_JIS             0x00000010
298 #define HID_QUIRK_RDESC_BUTTON_CONSUMER         0x00000020
299 #define HID_QUIRK_RDESC_SAMSUNG_REMOTE          0x00000040
300 #define HID_QUIRK_RDESC_MICROSOFT_RECV_1028     0x00000080
301 #define HID_QUIRK_RDESC_SUNPLUS_WDESKTOP        0x00000100
302
303 /*
304  * This is the global environment of the parser. This information is
305  * persistent for main-items. The global environment can be saved and
306  * restored with PUSH/POP statements.
307  */
308
309 struct hid_global {
310         unsigned usage_page;
311         __s32    logical_minimum;
312         __s32    logical_maximum;
313         __s32    physical_minimum;
314         __s32    physical_maximum;
315         __s32    unit_exponent;
316         unsigned unit;
317         unsigned report_id;
318         unsigned report_size;
319         unsigned report_count;
320 };
321
322 /*
323  * This is the local environment. It is persistent up the next main-item.
324  */
325
326 #define HID_MAX_USAGES                  12288
327 #define HID_DEFAULT_NUM_COLLECTIONS     16
328
329 struct hid_local {
330         unsigned usage[HID_MAX_USAGES]; /* usage array */
331         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
332         unsigned usage_index;
333         unsigned usage_minimum;
334         unsigned delimiter_depth;
335         unsigned delimiter_branch;
336 };
337
338 /*
339  * This is the collection stack. We climb up the stack to determine
340  * application and function of each field.
341  */
342
343 struct hid_collection {
344         unsigned type;
345         unsigned usage;
346         unsigned level;
347 };
348
349 struct hid_usage {
350         unsigned  hid;                  /* hid usage code */
351         unsigned  collection_index;     /* index into collection array */
352         /* hidinput data */
353         __u16     code;                 /* input driver code */
354         __u8      type;                 /* input driver type */
355         __s8      hat_min;              /* hat switch fun */
356         __s8      hat_max;              /* ditto */
357         __s8      hat_dir;              /* ditto */
358 };
359
360 struct hid_input;
361
362 struct hid_field {
363         unsigned  physical;             /* physical usage for this field */
364         unsigned  logical;              /* logical usage for this field */
365         unsigned  application;          /* application usage for this field */
366         struct hid_usage *usage;        /* usage table for this function */
367         unsigned  maxusage;             /* maximum usage index */
368         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
369         unsigned  report_offset;        /* bit offset in the report */
370         unsigned  report_size;          /* size of this field in the report */
371         unsigned  report_count;         /* number of this field in the report */
372         unsigned  report_type;          /* (input,output,feature) */
373         __s32    *value;                /* last known value(s) */
374         __s32     logical_minimum;
375         __s32     logical_maximum;
376         __s32     physical_minimum;
377         __s32     physical_maximum;
378         __s32     unit_exponent;
379         unsigned  unit;
380         struct hid_report *report;      /* associated report */
381         unsigned index;                 /* index into report->field[] */
382         /* hidinput data */
383         struct hid_input *hidinput;     /* associated input structure */
384         __u16 dpad;                     /* dpad input code */
385 };
386
387 #define HID_MAX_FIELDS 64
388
389 struct hid_report {
390         struct list_head list;
391         unsigned id;                                    /* id of this report */
392         unsigned type;                                  /* report type */
393         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
394         unsigned maxfield;                              /* maximum valid field index */
395         unsigned size;                                  /* size of the report (bits) */
396         struct hid_device *device;                      /* associated device */
397 };
398
399 struct hid_report_enum {
400         unsigned numbered;
401         struct list_head report_list;
402         struct hid_report *report_id_hash[256];
403 };
404
405 #define HID_REPORT_TYPES 3
406
407 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
408 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
409 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
410 #define HID_OUTPUT_FIFO_SIZE    64
411
412 struct hid_control_fifo {
413         unsigned char dir;
414         struct hid_report *report;
415 };
416
417 #define HID_CLAIMED_INPUT       1
418 #define HID_CLAIMED_HIDDEV      2
419 #define HID_CLAIMED_HIDRAW      4
420
421 #define HID_CTRL_RUNNING        1
422 #define HID_OUT_RUNNING         2
423 #define HID_IN_RUNNING          3
424 #define HID_RESET_PENDING       4
425 #define HID_SUSPENDED           5
426 #define HID_CLEAR_HALT          6
427 #define HID_DISCONNECTED        7
428
429 struct hid_input {
430         struct list_head list;
431         struct hid_report *report;
432         struct input_dev *input;
433 };
434
435 struct hid_device {                                                     /* device report descriptor */
436          __u8 *rdesc;
437         unsigned rsize;
438         struct hid_collection *collection;                              /* List of HID collections */
439         unsigned collection_size;                                       /* Number of allocated hid_collections */
440         unsigned maxcollection;                                         /* Number of parsed collections */
441         unsigned maxapplication;                                        /* Number of applications */
442         unsigned short bus;                                             /* BUS ID */
443         unsigned short vendor;                                          /* Vendor ID */
444         unsigned short product;                                         /* Product ID */
445         unsigned version;                                               /* HID version */
446         unsigned country;                                               /* HID country */
447         struct hid_report_enum report_enum[HID_REPORT_TYPES];
448
449         struct device *dev;                                             /* device */
450
451         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
452         unsigned quirks;                                                /* Various quirks the device can pull on us */
453
454         struct list_head inputs;                                        /* The list of inputs */
455         void *hiddev;                                                   /* The hiddev structure */
456         void *hidraw;
457         int minor;                                                      /* Hiddev minor number */
458
459         int open;                                                       /* is the device open by anyone? */
460         char name[128];                                                 /* Device name */
461         char phys[64];                                                  /* Device physical location */
462         char uniq[64];                                                  /* Device unique identifier (serial #) */
463
464         void *driver_data;
465
466         __s32 delayed_value;                                            /* For A4 Tech mice hwheel quirk */
467
468         /* device-specific function pointers */
469         int (*hidinput_input_event) (struct input_dev *, unsigned int, unsigned int, int);
470         int (*hid_open) (struct hid_device *);
471         void (*hid_close) (struct hid_device *);
472
473         /* hiddev event handler */
474         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
475                                   struct hid_usage *, __s32);
476         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
477
478         /* handler for raw output data, used by hidraw */
479         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t);
480 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
481         unsigned long apple_pressed_fn[BITS_TO_LONGS(KEY_CNT)];
482         unsigned long pb_pressed_numlock[BITS_TO_LONGS(KEY_CNT)];
483 #endif
484 };
485
486 #define HID_GLOBAL_STACK_SIZE 4
487 #define HID_COLLECTION_STACK_SIZE 4
488
489 struct hid_parser {
490         struct hid_global     global;
491         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
492         unsigned              global_stack_ptr;
493         struct hid_local      local;
494         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
495         unsigned              collection_stack_ptr;
496         struct hid_device    *device;
497 };
498
499 struct hid_class_descriptor {
500         __u8  bDescriptorType;
501         __u16 wDescriptorLength;
502 } __attribute__ ((packed));
503
504 struct hid_descriptor {
505         __u8  bLength;
506         __u8  bDescriptorType;
507         __u16 bcdHID;
508         __u8  bCountryCode;
509         __u8  bNumDescriptors;
510
511         struct hid_class_descriptor desc[1];
512 } __attribute__ ((packed));
513
514 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
515 /* We ignore a few input applications that are not widely used */
516 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001))
517
518 /* HID core API */
519
520 #ifdef CONFIG_HID_DEBUG
521 extern int hid_debug;
522 #endif
523
524 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
525 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
526 extern int hidinput_connect(struct hid_device *);
527 extern void hidinput_disconnect(struct hid_device *);
528
529 int hid_set_field(struct hid_field *, unsigned, __s32);
530 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
531 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
532 int hidinput_mapping_quirks(struct hid_usage *, struct input_dev *, unsigned long **, int *);
533 int hidinput_event_quirks(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
534 int hidinput_apple_event(struct hid_device *, struct input_dev *, struct hid_usage *, __s32);
535 void hid_output_report(struct hid_report *report, __u8 *data);
536 void hid_free_device(struct hid_device *device);
537 struct hid_device *hid_parse_report(__u8 *start, unsigned size);
538
539 /* HID quirks API */
540 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
541 int usbhid_quirks_init(char **quirks_param);
542 void usbhid_quirks_exit(void);
543 void usbhid_fixup_report_descriptor(const u16, const u16, char *, unsigned, char **);
544
545 #ifdef CONFIG_HID_FF
546 int hid_ff_init(struct hid_device *hid);
547
548 int hid_lgff_init(struct hid_device *hid);
549 int hid_lg2ff_init(struct hid_device *hid);
550 int hid_plff_init(struct hid_device *hid);
551 int hid_tmff_init(struct hid_device *hid);
552 int hid_zpff_init(struct hid_device *hid);
553 #ifdef CONFIG_HID_PID
554 int hid_pidff_init(struct hid_device *hid);
555 #else
556 static inline int hid_pidff_init(struct hid_device *hid) { return -ENODEV; }
557 #endif
558
559 #else
560 static inline int hid_ff_init(struct hid_device *hid) { return -1; }
561 #endif
562
563 #ifdef CONFIG_HID_DEBUG
564 #define dbg_hid(format, arg...) if (hid_debug) \
565                                 printk(KERN_DEBUG "%s: " format ,\
566                                 __FILE__ , ## arg)
567 #define dbg_hid_line(format, arg...) if (hid_debug) \
568                                 printk(format, ## arg)
569 #else
570 static inline int __attribute__((format(printf, 1, 2)))
571 dbg_hid(const char *fmt, ...)
572 {
573         return 0;
574 }
575 #define dbg_hid_line dbg_hid
576 #endif
577
578 #define err_hid(format, arg...) printk(KERN_ERR "%s: " format "\n" , \
579                 __FILE__ , ## arg)
580 #endif
581 #endif
582