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TOMOYO Linux Cross Reference
Linux/include/linux/hid.h

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  1 /*
  2  *  Copyright (c) 1999 Andreas Gal
  3  *  Copyright (c) 2000-2001 Vojtech Pavlik
  4  *  Copyright (c) 2006-2007 Jiri Kosina
  5  */
  6 /*
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, write to the Free Software
 19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 20  *
 21  * Should you need to contact me, the author, you can do so either by
 22  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 23  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 24  */
 25 #ifndef __HID_H
 26 #define __HID_H
 27 
 28 
 29 #include <linux/types.h>
 30 #include <linux/slab.h>
 31 #include <linux/list.h>
 32 #include <linux/mod_devicetable.h> /* hid_device_id */
 33 #include <linux/timer.h>
 34 #include <linux/workqueue.h>
 35 #include <linux/input.h>
 36 #include <linux/semaphore.h>
 37 #include <linux/power_supply.h>
 38 #include <uapi/linux/hid.h>
 39 
 40 /*
 41  * We parse each description item into this structure. Short items data
 42  * values are expanded to 32-bit signed int, long items contain a pointer
 43  * into the data area.
 44  */
 45 
 46 struct hid_item {
 47         unsigned  format;
 48         __u8      size;
 49         __u8      type;
 50         __u8      tag;
 51         union {
 52             __u8   u8;
 53             __s8   s8;
 54             __u16  u16;
 55             __s16  s16;
 56             __u32  u32;
 57             __s32  s32;
 58             __u8  *longdata;
 59         } data;
 60 };
 61 
 62 /*
 63  * HID report item format
 64  */
 65 
 66 #define HID_ITEM_FORMAT_SHORT   0
 67 #define HID_ITEM_FORMAT_LONG    1
 68 
 69 /*
 70  * Special tag indicating long items
 71  */
 72 
 73 #define HID_ITEM_TAG_LONG       15
 74 
 75 /*
 76  * HID report descriptor item type (prefix bit 2,3)
 77  */
 78 
 79 #define HID_ITEM_TYPE_MAIN              0
 80 #define HID_ITEM_TYPE_GLOBAL            1
 81 #define HID_ITEM_TYPE_LOCAL             2
 82 #define HID_ITEM_TYPE_RESERVED          3
 83 
 84 /*
 85  * HID report descriptor main item tags
 86  */
 87 
 88 #define HID_MAIN_ITEM_TAG_INPUT                 8
 89 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 90 #define HID_MAIN_ITEM_TAG_FEATURE               11
 91 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 92 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 93 
 94 /*
 95  * HID report descriptor main item contents
 96  */
 97 
 98 #define HID_MAIN_ITEM_CONSTANT          0x001
 99 #define HID_MAIN_ITEM_VARIABLE          0x002
100 #define HID_MAIN_ITEM_RELATIVE          0x004
101 #define HID_MAIN_ITEM_WRAP              0x008
102 #define HID_MAIN_ITEM_NONLINEAR         0x010
103 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
104 #define HID_MAIN_ITEM_NULL_STATE        0x040
105 #define HID_MAIN_ITEM_VOLATILE          0x080
106 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
107 
108 /*
109  * HID report descriptor collection item types
110  */
111 
112 #define HID_COLLECTION_PHYSICAL         0
113 #define HID_COLLECTION_APPLICATION      1
114 #define HID_COLLECTION_LOGICAL          2
115 
116 /*
117  * HID report descriptor global item tags
118  */
119 
120 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
121 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
122 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
123 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
124 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
125 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
126 #define HID_GLOBAL_ITEM_TAG_UNIT                6
127 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
128 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
129 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
130 #define HID_GLOBAL_ITEM_TAG_PUSH                10
131 #define HID_GLOBAL_ITEM_TAG_POP                 11
132 
133 /*
134  * HID report descriptor local item tags
135  */
136 
137 #define HID_LOCAL_ITEM_TAG_USAGE                0
138 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
139 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
140 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
141 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
142 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
143 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
144 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
145 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
146 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
147 
148 /*
149  * HID usage tables
150  */
151 
152 #define HID_USAGE_PAGE          0xffff0000
153 
154 #define HID_UP_UNDEFINED        0x00000000
155 #define HID_UP_GENDESK          0x00010000
156 #define HID_UP_SIMULATION       0x00020000
157 #define HID_UP_GENDEVCTRLS      0x00060000
158 #define HID_UP_KEYBOARD         0x00070000
159 #define HID_UP_LED              0x00080000
160 #define HID_UP_BUTTON           0x00090000
161 #define HID_UP_ORDINAL          0x000a0000
162 #define HID_UP_TELEPHONY        0x000b0000
163 #define HID_UP_CONSUMER         0x000c0000
164 #define HID_UP_DIGITIZER        0x000d0000
165 #define HID_UP_PID              0x000f0000
166 #define HID_UP_HPVENDOR         0xff7f0000
167 #define HID_UP_HPVENDOR2        0xff010000
168 #define HID_UP_MSVENDOR         0xff000000
169 #define HID_UP_CUSTOM           0x00ff0000
170 #define HID_UP_LOGIVENDOR       0xffbc0000
171 #define HID_UP_LNVENDOR         0xffa00000
172 #define HID_UP_SENSOR           0x00200000
173 
174 #define HID_USAGE               0x0000ffff
175 
176 #define HID_GD_POINTER          0x00010001
177 #define HID_GD_MOUSE            0x00010002
178 #define HID_GD_JOYSTICK         0x00010004
179 #define HID_GD_GAMEPAD          0x00010005
180 #define HID_GD_KEYBOARD         0x00010006
181 #define HID_GD_KEYPAD           0x00010007
182 #define HID_GD_MULTIAXIS        0x00010008
183 #define HID_GD_X                0x00010030
184 #define HID_GD_Y                0x00010031
185 #define HID_GD_Z                0x00010032
186 #define HID_GD_RX               0x00010033
187 #define HID_GD_RY               0x00010034
188 #define HID_GD_RZ               0x00010035
189 #define HID_GD_SLIDER           0x00010036
190 #define HID_GD_DIAL             0x00010037
191 #define HID_GD_WHEEL            0x00010038
192 #define HID_GD_HATSWITCH        0x00010039
193 #define HID_GD_BUFFER           0x0001003a
194 #define HID_GD_BYTECOUNT        0x0001003b
195 #define HID_GD_MOTION           0x0001003c
196 #define HID_GD_START            0x0001003d
197 #define HID_GD_SELECT           0x0001003e
198 #define HID_GD_VX               0x00010040
199 #define HID_GD_VY               0x00010041
200 #define HID_GD_VZ               0x00010042
201 #define HID_GD_VBRX             0x00010043
202 #define HID_GD_VBRY             0x00010044
203 #define HID_GD_VBRZ             0x00010045
204 #define HID_GD_VNO              0x00010046
205 #define HID_GD_FEATURE          0x00010047
206 #define HID_GD_SYSTEM_CONTROL   0x00010080
207 #define HID_GD_UP               0x00010090
208 #define HID_GD_DOWN             0x00010091
209 #define HID_GD_RIGHT            0x00010092
210 #define HID_GD_LEFT             0x00010093
211 
212 #define HID_DC_BATTERYSTRENGTH  0x00060020
213 
214 #define HID_CP_CONSUMER_CONTROL 0x000c0001
215 
216 #define HID_DG_DIGITIZER        0x000d0001
217 #define HID_DG_PEN              0x000d0002
218 #define HID_DG_LIGHTPEN         0x000d0003
219 #define HID_DG_TOUCHSCREEN      0x000d0004
220 #define HID_DG_TOUCHPAD         0x000d0005
221 #define HID_DG_STYLUS           0x000d0020
222 #define HID_DG_PUCK             0x000d0021
223 #define HID_DG_FINGER           0x000d0022
224 #define HID_DG_TIPPRESSURE      0x000d0030
225 #define HID_DG_BARRELPRESSURE   0x000d0031
226 #define HID_DG_INRANGE          0x000d0032
227 #define HID_DG_TOUCH            0x000d0033
228 #define HID_DG_UNTOUCH          0x000d0034
229 #define HID_DG_TAP              0x000d0035
230 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
231 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
232 #define HID_DG_INVERT           0x000d003c
233 #define HID_DG_TIPSWITCH        0x000d0042
234 #define HID_DG_TIPSWITCH2       0x000d0043
235 #define HID_DG_BARRELSWITCH     0x000d0044
236 #define HID_DG_ERASER           0x000d0045
237 #define HID_DG_TABLETPICK       0x000d0046
238 
239 #define HID_CP_CONSUMERCONTROL  0x000c0001
240 #define HID_CP_NUMERICKEYPAD    0x000c0002
241 #define HID_CP_PROGRAMMABLEBUTTONS      0x000c0003
242 #define HID_CP_MICROPHONE       0x000c0004
243 #define HID_CP_HEADPHONE        0x000c0005
244 #define HID_CP_GRAPHICEQUALIZER 0x000c0006
245 #define HID_CP_FUNCTIONBUTTONS  0x000c0036
246 #define HID_CP_SELECTION        0x000c0080
247 #define HID_CP_MEDIASELECTION   0x000c0087
248 #define HID_CP_SELECTDISC       0x000c00ba
249 #define HID_CP_PLAYBACKSPEED    0x000c00f1
250 #define HID_CP_PROXIMITY        0x000c0109
251 #define HID_CP_SPEAKERSYSTEM    0x000c0160
252 #define HID_CP_CHANNELLEFT      0x000c0161
253 #define HID_CP_CHANNELRIGHT     0x000c0162
254 #define HID_CP_CHANNELCENTER    0x000c0163
255 #define HID_CP_CHANNELFRONT     0x000c0164
256 #define HID_CP_CHANNELCENTERFRONT       0x000c0165
257 #define HID_CP_CHANNELSIDE      0x000c0166
258 #define HID_CP_CHANNELSURROUND  0x000c0167
259 #define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT   0x000c0168
260 #define HID_CP_CHANNELTOP       0x000c0169
261 #define HID_CP_CHANNELUNKNOWN   0x000c016a
262 #define HID_CP_APPLICATIONLAUNCHBUTTONS 0x000c0180
263 #define HID_CP_GENERICGUIAPPLICATIONCONTROLS    0x000c0200
264 
265 #define HID_DG_CONFIDENCE       0x000d0047
266 #define HID_DG_WIDTH            0x000d0048
267 #define HID_DG_HEIGHT           0x000d0049
268 #define HID_DG_CONTACTID        0x000d0051
269 #define HID_DG_INPUTMODE        0x000d0052
270 #define HID_DG_DEVICEINDEX      0x000d0053
271 #define HID_DG_CONTACTCOUNT     0x000d0054
272 #define HID_DG_CONTACTMAX       0x000d0055
273 #define HID_DG_BUTTONTYPE       0x000d0059
274 #define HID_DG_BARRELSWITCH2    0x000d005a
275 #define HID_DG_TOOLSERIALNUMBER 0x000d005b
276 
277 /*
278  * HID report types --- Ouch! HID spec says 1 2 3!
279  */
280 
281 #define HID_INPUT_REPORT        0
282 #define HID_OUTPUT_REPORT       1
283 #define HID_FEATURE_REPORT      2
284 
285 #define HID_REPORT_TYPES        3
286 
287 /*
288  * HID connect requests
289  */
290 
291 #define HID_CONNECT_HIDINPUT            0x01
292 #define HID_CONNECT_HIDINPUT_FORCE      0x02
293 #define HID_CONNECT_HIDRAW              0x04
294 #define HID_CONNECT_HIDDEV              0x08
295 #define HID_CONNECT_HIDDEV_FORCE        0x10
296 #define HID_CONNECT_FF                  0x20
297 #define HID_CONNECT_DRIVER              0x40
298 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
299                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
300 
301 /*
302  * HID device quirks.
303  */
304 
305 /* 
306  * Increase this if you need to configure more HID quirks at module load time
307  */
308 #define MAX_USBHID_BOOT_QUIRKS 4
309 
310 #define HID_QUIRK_INVERT                        0x00000001
311 #define HID_QUIRK_NOTOUCH                       0x00000002
312 #define HID_QUIRK_IGNORE                        0x00000004
313 #define HID_QUIRK_NOGET                         0x00000008
314 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
315 #define HID_QUIRK_BADPAD                        0x00000020
316 #define HID_QUIRK_MULTI_INPUT                   0x00000040
317 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
318 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
319 #define HID_QUIRK_NO_INIT_INPUT_REPORTS         0x00000200
320 #define HID_QUIRK_ALWAYS_POLL                   0x00000400
321 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
322 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID         0x00020000
323 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP  0x00040000
324 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
325 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
326 #define HID_QUIRK_NO_IGNORE                     0x40000000
327 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
328 
329 /*
330  * HID device groups
331  *
332  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
333  * and has a value of 0x0000
334  */
335 #define HID_GROUP_GENERIC                       0x0001
336 #define HID_GROUP_MULTITOUCH                    0x0002
337 #define HID_GROUP_SENSOR_HUB                    0x0003
338 #define HID_GROUP_MULTITOUCH_WIN_8              0x0004
339 
340 /*
341  * Vendor specific HID device groups
342  */
343 #define HID_GROUP_RMI                           0x0100
344 #define HID_GROUP_WACOM                         0x0101
345 #define HID_GROUP_LOGITECH_DJ_DEVICE            0x0102
346 
347 /*
348  * This is the global environment of the parser. This information is
349  * persistent for main-items. The global environment can be saved and
350  * restored with PUSH/POP statements.
351  */
352 
353 struct hid_global {
354         unsigned usage_page;
355         __s32    logical_minimum;
356         __s32    logical_maximum;
357         __s32    physical_minimum;
358         __s32    physical_maximum;
359         __s32    unit_exponent;
360         unsigned unit;
361         unsigned report_id;
362         unsigned report_size;
363         unsigned report_count;
364 };
365 
366 /*
367  * This is the local environment. It is persistent up the next main-item.
368  */
369 
370 #define HID_MAX_USAGES                  12288
371 #define HID_DEFAULT_NUM_COLLECTIONS     16
372 
373 struct hid_local {
374         unsigned usage[HID_MAX_USAGES]; /* usage array */
375         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
376         unsigned usage_index;
377         unsigned usage_minimum;
378         unsigned delimiter_depth;
379         unsigned delimiter_branch;
380 };
381 
382 /*
383  * This is the collection stack. We climb up the stack to determine
384  * application and function of each field.
385  */
386 
387 struct hid_collection {
388         unsigned type;
389         unsigned usage;
390         unsigned level;
391 };
392 
393 struct hid_usage {
394         unsigned  hid;                  /* hid usage code */
395         unsigned  collection_index;     /* index into collection array */
396         unsigned  usage_index;          /* index into usage array */
397         /* hidinput data */
398         __u16     code;                 /* input driver code */
399         __u8      type;                 /* input driver type */
400         __s8      hat_min;              /* hat switch fun */
401         __s8      hat_max;              /* ditto */
402         __s8      hat_dir;              /* ditto */
403 };
404 
405 struct hid_input;
406 
407 struct hid_field {
408         unsigned  physical;             /* physical usage for this field */
409         unsigned  logical;              /* logical usage for this field */
410         unsigned  application;          /* application usage for this field */
411         struct hid_usage *usage;        /* usage table for this function */
412         unsigned  maxusage;             /* maximum usage index */
413         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
414         unsigned  report_offset;        /* bit offset in the report */
415         unsigned  report_size;          /* size of this field in the report */
416         unsigned  report_count;         /* number of this field in the report */
417         unsigned  report_type;          /* (input,output,feature) */
418         __s32    *value;                /* last known value(s) */
419         __s32     logical_minimum;
420         __s32     logical_maximum;
421         __s32     physical_minimum;
422         __s32     physical_maximum;
423         __s32     unit_exponent;
424         unsigned  unit;
425         struct hid_report *report;      /* associated report */
426         unsigned index;                 /* index into report->field[] */
427         /* hidinput data */
428         struct hid_input *hidinput;     /* associated input structure */
429         __u16 dpad;                     /* dpad input code */
430 };
431 
432 #define HID_MAX_FIELDS 256
433 
434 struct hid_report {
435         struct list_head list;
436         unsigned id;                                    /* id of this report */
437         unsigned type;                                  /* report type */
438         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
439         unsigned maxfield;                              /* maximum valid field index */
440         unsigned size;                                  /* size of the report (bits) */
441         struct hid_device *device;                      /* associated device */
442 };
443 
444 #define HID_MAX_IDS 256
445 
446 struct hid_report_enum {
447         unsigned numbered;
448         struct list_head report_list;
449         struct hid_report *report_id_hash[HID_MAX_IDS];
450 };
451 
452 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
453 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
454 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
455 #define HID_OUTPUT_FIFO_SIZE    64
456 
457 struct hid_control_fifo {
458         unsigned char dir;
459         struct hid_report *report;
460         char *raw_report;
461 };
462 
463 struct hid_output_fifo {
464         struct hid_report *report;
465         char *raw_report;
466 };
467 
468 #define HID_CLAIMED_INPUT       1
469 #define HID_CLAIMED_HIDDEV      2
470 #define HID_CLAIMED_HIDRAW      4
471 #define HID_CLAIMED_DRIVER      8
472 
473 #define HID_STAT_ADDED          1
474 #define HID_STAT_PARSED         2
475 
476 struct hid_input {
477         struct list_head list;
478         struct hid_report *report;
479         struct input_dev *input;
480 };
481 
482 enum hid_type {
483         HID_TYPE_OTHER = 0,
484         HID_TYPE_USBMOUSE,
485         HID_TYPE_USBNONE
486 };
487 
488 struct hid_driver;
489 struct hid_ll_driver;
490 
491 struct hid_device {                                                     /* device report descriptor */
492         __u8 *dev_rdesc;
493         unsigned dev_rsize;
494         __u8 *rdesc;
495         unsigned rsize;
496         struct hid_collection *collection;                              /* List of HID collections */
497         unsigned collection_size;                                       /* Number of allocated hid_collections */
498         unsigned maxcollection;                                         /* Number of parsed collections */
499         unsigned maxapplication;                                        /* Number of applications */
500         __u16 bus;                                                      /* BUS ID */
501         __u16 group;                                                    /* Report group */
502         __u32 vendor;                                                   /* Vendor ID */
503         __u32 product;                                                  /* Product ID */
504         __u32 version;                                                  /* HID version */
505         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
506         unsigned country;                                               /* HID country */
507         struct hid_report_enum report_enum[HID_REPORT_TYPES];
508         struct work_struct led_work;                                    /* delayed LED worker */
509 
510         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
511         struct semaphore driver_input_lock;                             /* protects the current driver */
512         struct device dev;                                              /* device */
513         struct hid_driver *driver;
514         struct hid_ll_driver *ll_driver;
515 
516 #ifdef CONFIG_HID_BATTERY_STRENGTH
517         /*
518          * Power supply information for HID devices which report
519          * battery strength. power_supply was successfully registered if
520          * battery is non-NULL.
521          */
522         struct power_supply *battery;
523         __s32 battery_min;
524         __s32 battery_max;
525         __s32 battery_report_type;
526         __s32 battery_report_id;
527 #endif
528 
529         unsigned int status;                                            /* see STAT flags above */
530         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
531         unsigned quirks;                                                /* Various quirks the device can pull on us */
532         bool io_started;                                                /* Protected by driver_lock. If IO has started */
533 
534         struct list_head inputs;                                        /* The list of inputs */
535         void *hiddev;                                                   /* The hiddev structure */
536         void *hidraw;
537         int minor;                                                      /* Hiddev minor number */
538 
539         int open;                                                       /* is the device open by anyone? */
540         char name[128];                                                 /* Device name */
541         char phys[64];                                                  /* Device physical location */
542         char uniq[64];                                                  /* Device unique identifier (serial #) */
543 
544         void *driver_data;
545 
546         /* temporary hid_ff handling (until moved to the drivers) */
547         int (*ff_init)(struct hid_device *);
548 
549         /* hiddev event handler */
550         int (*hiddev_connect)(struct hid_device *, unsigned int);
551         void (*hiddev_disconnect)(struct hid_device *);
552         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
553                                   struct hid_usage *, __s32);
554         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
555 
556         /* debugging support via debugfs */
557         unsigned short debug;
558         struct dentry *debug_dir;
559         struct dentry *debug_rdesc;
560         struct dentry *debug_events;
561         struct list_head debug_list;
562         spinlock_t  debug_list_lock;
563         wait_queue_head_t debug_wait;
564 };
565 
566 static inline void *hid_get_drvdata(struct hid_device *hdev)
567 {
568         return dev_get_drvdata(&hdev->dev);
569 }
570 
571 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
572 {
573         dev_set_drvdata(&hdev->dev, data);
574 }
575 
576 #define HID_GLOBAL_STACK_SIZE 4
577 #define HID_COLLECTION_STACK_SIZE 4
578 
579 #define HID_SCAN_FLAG_MT_WIN_8                  BIT(0)
580 #define HID_SCAN_FLAG_VENDOR_SPECIFIC           BIT(1)
581 #define HID_SCAN_FLAG_GD_POINTER                BIT(2)
582 
583 struct hid_parser {
584         struct hid_global     global;
585         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
586         unsigned              global_stack_ptr;
587         struct hid_local      local;
588         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
589         unsigned              collection_stack_ptr;
590         struct hid_device    *device;
591         unsigned              scan_flags;
592 };
593 
594 struct hid_class_descriptor {
595         __u8  bDescriptorType;
596         __le16 wDescriptorLength;
597 } __attribute__ ((packed));
598 
599 struct hid_descriptor {
600         __u8  bLength;
601         __u8  bDescriptorType;
602         __le16 bcdHID;
603         __u8  bCountryCode;
604         __u8  bNumDescriptors;
605 
606         struct hid_class_descriptor desc[1];
607 } __attribute__ ((packed));
608 
609 #define HID_DEVICE(b, g, ven, prod)                                     \
610         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
611 #define HID_USB_DEVICE(ven, prod)                               \
612         .bus = BUS_USB, .vendor = (ven), .product = (prod)
613 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
614         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
615 #define HID_I2C_DEVICE(ven, prod)                               \
616         .bus = BUS_I2C, .vendor = (ven), .product = (prod)
617 
618 #define HID_REPORT_ID(rep) \
619         .report_type = (rep)
620 #define HID_USAGE_ID(uhid, utype, ucode) \
621         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
622 /* we don't want to catch types and codes equal to 0 */
623 #define HID_TERMINATOR          (HID_ANY_ID - 1)
624 
625 struct hid_report_id {
626         __u32 report_type;
627 };
628 struct hid_usage_id {
629         __u32 usage_hid;
630         __u32 usage_type;
631         __u32 usage_code;
632 };
633 
634 /**
635  * struct hid_driver
636  * @name: driver name (e.g. "Footech_bar-wheel")
637  * @id_table: which devices is this driver for (must be non-NULL for probe
638  *            to be called)
639  * @dyn_list: list of dynamically added device ids
640  * @dyn_lock: lock protecting @dyn_list
641  * @probe: new device inserted
642  * @remove: device removed (NULL if not a hot-plug capable driver)
643  * @report_table: on which reports to call raw_event (NULL means all)
644  * @raw_event: if report in report_table, this hook is called (NULL means nop)
645  * @usage_table: on which events to call event (NULL means all)
646  * @event: if usage in usage_table, this hook is called (NULL means nop)
647  * @report: this hook is called after parsing a report (NULL means nop)
648  * @report_fixup: called before report descriptor parsing (NULL means nop)
649  * @input_mapping: invoked on input registering before mapping an usage
650  * @input_mapped: invoked on input registering after mapping an usage
651  * @input_configured: invoked just before the device is registered
652  * @feature_mapping: invoked on feature registering
653  * @suspend: invoked on suspend (NULL means nop)
654  * @resume: invoked on resume if device was not reset (NULL means nop)
655  * @reset_resume: invoked on resume if device was reset (NULL means nop)
656  *
657  * probe should return -errno on error, or 0 on success. During probe,
658  * input will not be passed to raw_event unless hid_device_io_start is
659  * called.
660  *
661  * raw_event and event should return 0 on no action performed, 1 when no
662  * further processing should be done and negative on error
663  *
664  * input_mapping shall return a negative value to completely ignore this usage
665  * (e.g. doubled or invalid usage), zero to continue with parsing of this
666  * usage by generic code (no special handling needed) or positive to skip
667  * generic parsing (needed special handling which was done in the hook already)
668  * input_mapped shall return negative to inform the layer that this usage
669  * should not be considered for further processing or zero to notify that
670  * no processing was performed and should be done in a generic manner
671  * Both these functions may be NULL which means the same behavior as returning
672  * zero from them.
673  */
674 struct hid_driver {
675         char *name;
676         const struct hid_device_id *id_table;
677 
678         struct list_head dyn_list;
679         spinlock_t dyn_lock;
680 
681         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
682         void (*remove)(struct hid_device *dev);
683 
684         const struct hid_report_id *report_table;
685         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
686                         u8 *data, int size);
687         const struct hid_usage_id *usage_table;
688         int (*event)(struct hid_device *hdev, struct hid_field *field,
689                         struct hid_usage *usage, __s32 value);
690         void (*report)(struct hid_device *hdev, struct hid_report *report);
691 
692         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
693                         unsigned int *size);
694 
695         int (*input_mapping)(struct hid_device *hdev,
696                         struct hid_input *hidinput, struct hid_field *field,
697                         struct hid_usage *usage, unsigned long **bit, int *max);
698         int (*input_mapped)(struct hid_device *hdev,
699                         struct hid_input *hidinput, struct hid_field *field,
700                         struct hid_usage *usage, unsigned long **bit, int *max);
701         void (*input_configured)(struct hid_device *hdev,
702                                  struct hid_input *hidinput);
703         void (*feature_mapping)(struct hid_device *hdev,
704                         struct hid_field *field,
705                         struct hid_usage *usage);
706 #ifdef CONFIG_PM
707         int (*suspend)(struct hid_device *hdev, pm_message_t message);
708         int (*resume)(struct hid_device *hdev);
709         int (*reset_resume)(struct hid_device *hdev);
710 #endif
711 /* private: */
712         struct device_driver driver;
713 };
714 
715 /**
716  * hid_ll_driver - low level driver callbacks
717  * @start: called on probe to start the device
718  * @stop: called on remove
719  * @open: called by input layer on open
720  * @close: called by input layer on close
721  * @parse: this method is called only once to parse the device data,
722  *         shouldn't allocate anything to not leak memory
723  * @request: send report request to device (e.g. feature report)
724  * @wait: wait for buffered io to complete (send/recv reports)
725  * @raw_request: send raw report request to device (e.g. feature report)
726  * @output_report: send output report to device
727  * @idle: send idle request to device
728  */
729 struct hid_ll_driver {
730         int (*start)(struct hid_device *hdev);
731         void (*stop)(struct hid_device *hdev);
732 
733         int (*open)(struct hid_device *hdev);
734         void (*close)(struct hid_device *hdev);
735 
736         int (*power)(struct hid_device *hdev, int level);
737 
738         int (*parse)(struct hid_device *hdev);
739 
740         void (*request)(struct hid_device *hdev,
741                         struct hid_report *report, int reqtype);
742 
743         int (*wait)(struct hid_device *hdev);
744 
745         int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
746                             __u8 *buf, size_t len, unsigned char rtype,
747                             int reqtype);
748 
749         int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
750 
751         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
752 };
753 
754 #define PM_HINT_FULLON  1<<5
755 #define PM_HINT_NORMAL  1<<1
756 
757 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
758 /* We ignore a few input applications that are not widely used */
759 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
760 
761 /* HID core API */
762 
763 extern int hid_debug;
764 
765 extern bool hid_ignore(struct hid_device *);
766 extern int hid_add_device(struct hid_device *);
767 extern void hid_destroy_device(struct hid_device *);
768 
769 extern int __must_check __hid_register_driver(struct hid_driver *,
770                 struct module *, const char *mod_name);
771 
772 /* use a define to avoid include chaining to get THIS_MODULE & friends */
773 #define hid_register_driver(driver) \
774         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
775 
776 extern void hid_unregister_driver(struct hid_driver *);
777 
778 /**
779  * module_hid_driver() - Helper macro for registering a HID driver
780  * @__hid_driver: hid_driver struct
781  *
782  * Helper macro for HID drivers which do not do anything special in module
783  * init/exit. This eliminates a lot of boilerplate. Each module may only
784  * use this macro once, and calling it replaces module_init() and module_exit()
785  */
786 #define module_hid_driver(__hid_driver) \
787         module_driver(__hid_driver, hid_register_driver, \
788                       hid_unregister_driver)
789 
790 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
791 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
792 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
793 extern void hidinput_disconnect(struct hid_device *);
794 
795 int hid_set_field(struct hid_field *, unsigned, __s32);
796 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
797 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
798 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
799 unsigned int hidinput_count_leds(struct hid_device *hid);
800 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
801 void hid_output_report(struct hid_report *report, __u8 *data);
802 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
803 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
804 struct hid_device *hid_allocate_device(void);
805 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
806 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
807 struct hid_report *hid_validate_values(struct hid_device *hid,
808                                        unsigned int type, unsigned int id,
809                                        unsigned int field_index,
810                                        unsigned int report_counts);
811 int hid_open_report(struct hid_device *device);
812 int hid_check_keys_pressed(struct hid_device *hid);
813 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
814 void hid_disconnect(struct hid_device *hid);
815 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
816                                          const struct hid_device_id *id);
817 s32 hid_snto32(__u32 value, unsigned n);
818 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
819                      unsigned offset, unsigned n);
820 
821 /**
822  * hid_device_io_start - enable HID input during probe, remove
823  *
824  * @hid - the device
825  *
826  * This should only be called during probe or remove and only be
827  * called by the thread calling probe or remove. It will allow
828  * incoming packets to be delivered to the driver.
829  */
830 static inline void hid_device_io_start(struct hid_device *hid) {
831         if (hid->io_started) {
832                 dev_warn(&hid->dev, "io already started");
833                 return;
834         }
835         hid->io_started = true;
836         up(&hid->driver_input_lock);
837 }
838 
839 /**
840  * hid_device_io_stop - disable HID input during probe, remove
841  *
842  * @hid - the device
843  *
844  * Should only be called after hid_device_io_start. It will prevent
845  * incoming packets from going to the driver for the duration of
846  * probe, remove. If called during probe, packets will still go to the
847  * driver after probe is complete. This function should only be called
848  * by the thread calling probe or remove.
849  */
850 static inline void hid_device_io_stop(struct hid_device *hid) {
851         if (!hid->io_started) {
852                 dev_warn(&hid->dev, "io already stopped");
853                 return;
854         }
855         hid->io_started = false;
856         down(&hid->driver_input_lock);
857 }
858 
859 /**
860  * hid_map_usage - map usage input bits
861  *
862  * @hidinput: hidinput which we are interested in
863  * @usage: usage to fill in
864  * @bit: pointer to input->{}bit (out parameter)
865  * @max: maximal valid usage->code to consider later (out parameter)
866  * @type: input event type (EV_KEY, EV_REL, ...)
867  * @c: code which corresponds to this usage and type
868  */
869 static inline void hid_map_usage(struct hid_input *hidinput,
870                 struct hid_usage *usage, unsigned long **bit, int *max,
871                 __u8 type, __u16 c)
872 {
873         struct input_dev *input = hidinput->input;
874 
875         usage->type = type;
876         usage->code = c;
877 
878         switch (type) {
879         case EV_ABS:
880                 *bit = input->absbit;
881                 *max = ABS_MAX;
882                 break;
883         case EV_REL:
884                 *bit = input->relbit;
885                 *max = REL_MAX;
886                 break;
887         case EV_KEY:
888                 *bit = input->keybit;
889                 *max = KEY_MAX;
890                 break;
891         case EV_LED:
892                 *bit = input->ledbit;
893                 *max = LED_MAX;
894                 break;
895         }
896 }
897 
898 /**
899  * hid_map_usage_clear - map usage input bits and clear the input bit
900  *
901  * The same as hid_map_usage, except the @c bit is also cleared in supported
902  * bits (@bit).
903  */
904 static inline void hid_map_usage_clear(struct hid_input *hidinput,
905                 struct hid_usage *usage, unsigned long **bit, int *max,
906                 __u8 type, __u16 c)
907 {
908         hid_map_usage(hidinput, usage, bit, max, type, c);
909         clear_bit(c, *bit);
910 }
911 
912 /**
913  * hid_parse - parse HW reports
914  *
915  * @hdev: hid device
916  *
917  * Call this from probe after you set up the device (if needed). Your
918  * report_fixup will be called (if non-NULL) after reading raw report from
919  * device before passing it to hid layer for real parsing.
920  */
921 static inline int __must_check hid_parse(struct hid_device *hdev)
922 {
923         return hid_open_report(hdev);
924 }
925 
926 /**
927  * hid_hw_start - start underlaying HW
928  *
929  * @hdev: hid device
930  * @connect_mask: which outputs to connect, see HID_CONNECT_*
931  *
932  * Call this in probe function *after* hid_parse. This will setup HW buffers
933  * and start the device (if not deffered to device open). hid_hw_stop must be
934  * called if this was successful.
935  */
936 static inline int __must_check hid_hw_start(struct hid_device *hdev,
937                 unsigned int connect_mask)
938 {
939         int ret = hdev->ll_driver->start(hdev);
940         if (ret || !connect_mask)
941                 return ret;
942         ret = hid_connect(hdev, connect_mask);
943         if (ret)
944                 hdev->ll_driver->stop(hdev);
945         return ret;
946 }
947 
948 /**
949  * hid_hw_stop - stop underlaying HW
950  *
951  * @hdev: hid device
952  *
953  * This is usually called from remove function or from probe when something
954  * failed and hid_hw_start was called already.
955  */
956 static inline void hid_hw_stop(struct hid_device *hdev)
957 {
958         hid_disconnect(hdev);
959         hdev->ll_driver->stop(hdev);
960 }
961 
962 /**
963  * hid_hw_open - signal underlaying HW to start delivering events
964  *
965  * @hdev: hid device
966  *
967  * Tell underlying HW to start delivering events from the device.
968  * This function should be called sometime after successful call
969  * to hid_hiw_start().
970  */
971 static inline int __must_check hid_hw_open(struct hid_device *hdev)
972 {
973         return hdev->ll_driver->open(hdev);
974 }
975 
976 /**
977  * hid_hw_close - signal underlaying HW to stop delivering events
978  *
979  * @hdev: hid device
980  *
981  * This function indicates that we are not interested in the events
982  * from this device anymore. Delivery of events may or may not stop,
983  * depending on the number of users still outstanding.
984  */
985 static inline void hid_hw_close(struct hid_device *hdev)
986 {
987         hdev->ll_driver->close(hdev);
988 }
989 
990 /**
991  * hid_hw_power - requests underlying HW to go into given power mode
992  *
993  * @hdev: hid device
994  * @level: requested power level (one of %PM_HINT_* defines)
995  *
996  * This function requests underlying hardware to enter requested power
997  * mode.
998  */
999 
1000 static inline int hid_hw_power(struct hid_device *hdev, int level)
1001 {
1002         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
1003 }
1004 
1005 
1006 /**
1007  * hid_hw_request - send report request to device
1008  *
1009  * @hdev: hid device
1010  * @report: report to send
1011  * @reqtype: hid request type
1012  */
1013 static inline void hid_hw_request(struct hid_device *hdev,
1014                                   struct hid_report *report, int reqtype)
1015 {
1016         if (hdev->ll_driver->request)
1017                 return hdev->ll_driver->request(hdev, report, reqtype);
1018 
1019         __hid_request(hdev, report, reqtype);
1020 }
1021 
1022 /**
1023  * hid_hw_raw_request - send report request to device
1024  *
1025  * @hdev: hid device
1026  * @reportnum: report ID
1027  * @buf: in/out data to transfer
1028  * @len: length of buf
1029  * @rtype: HID report type
1030  * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
1031  *
1032  * @return: count of data transfered, negative if error
1033  *
1034  * Same behavior as hid_hw_request, but with raw buffers instead.
1035  */
1036 static inline int hid_hw_raw_request(struct hid_device *hdev,
1037                                   unsigned char reportnum, __u8 *buf,
1038                                   size_t len, unsigned char rtype, int reqtype)
1039 {
1040         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1041                 return -EINVAL;
1042 
1043         return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
1044                                                     rtype, reqtype);
1045 }
1046 
1047 /**
1048  * hid_hw_output_report - send output report to device
1049  *
1050  * @hdev: hid device
1051  * @buf: raw data to transfer
1052  * @len: length of buf
1053  *
1054  * @return: count of data transfered, negative if error
1055  */
1056 static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
1057                                         size_t len)
1058 {
1059         if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
1060                 return -EINVAL;
1061 
1062         if (hdev->ll_driver->output_report)
1063                 return hdev->ll_driver->output_report(hdev, buf, len);
1064 
1065         return -ENOSYS;
1066 }
1067 
1068 /**
1069  * hid_hw_idle - send idle request to device
1070  *
1071  * @hdev: hid device
1072  * @report: report to control
1073  * @idle: idle state
1074  * @reqtype: hid request type
1075  */
1076 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1077                 int reqtype)
1078 {
1079         if (hdev->ll_driver->idle)
1080                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1081 
1082         return 0;
1083 }
1084 
1085 /**
1086  * hid_hw_wait - wait for buffered io to complete
1087  *
1088  * @hdev: hid device
1089  */
1090 static inline void hid_hw_wait(struct hid_device *hdev)
1091 {
1092         if (hdev->ll_driver->wait)
1093                 hdev->ll_driver->wait(hdev);
1094 }
1095 
1096 /**
1097  * hid_report_len - calculate the report length
1098  *
1099  * @report: the report we want to know the length
1100  */
1101 static inline int hid_report_len(struct hid_report *report)
1102 {
1103         /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
1104         return ((report->size - 1) >> 3) + 1 + (report->id > 0);
1105 }
1106 
1107 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1108                 int interrupt);
1109 
1110 /* HID quirks API */
1111 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
1112 int usbhid_quirks_init(char **quirks_param);
1113 void usbhid_quirks_exit(void);
1114 
1115 #ifdef CONFIG_HID_PID
1116 int hid_pidff_init(struct hid_device *hid);
1117 #else
1118 #define hid_pidff_init NULL
1119 #endif
1120 
1121 #define dbg_hid(format, arg...)                                         \
1122 do {                                                                    \
1123         if (hid_debug)                                                  \
1124                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1125 } while (0)
1126 
1127 #define hid_printk(level, hid, fmt, arg...)             \
1128         dev_printk(level, &(hid)->dev, fmt, ##arg)
1129 #define hid_emerg(hid, fmt, arg...)                     \
1130         dev_emerg(&(hid)->dev, fmt, ##arg)
1131 #define hid_crit(hid, fmt, arg...)                      \
1132         dev_crit(&(hid)->dev, fmt, ##arg)
1133 #define hid_alert(hid, fmt, arg...)                     \
1134         dev_alert(&(hid)->dev, fmt, ##arg)
1135 #define hid_err(hid, fmt, arg...)                       \
1136         dev_err(&(hid)->dev, fmt, ##arg)
1137 #define hid_notice(hid, fmt, arg...)                    \
1138         dev_notice(&(hid)->dev, fmt, ##arg)
1139 #define hid_warn(hid, fmt, arg...)                      \
1140         dev_warn(&(hid)->dev, fmt, ##arg)
1141 #define hid_info(hid, fmt, arg...)                      \
1142         dev_info(&(hid)->dev, fmt, ##arg)
1143 #define hid_dbg(hid, fmt, arg...)                       \
1144         dev_dbg(&(hid)->dev, fmt, ##arg)
1145 
1146 #endif
1147 

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