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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_CONSUMER         0x000c0000
163 #define HID_UP_DIGITIZER        0x000d0000
164 #define HID_UP_PID              0x000f0000
165 #define HID_UP_HPVENDOR         0xff7f0000
166 #define HID_UP_HPVENDOR2        0xff010000
167 #define HID_UP_MSVENDOR         0xff000000
168 #define HID_UP_CUSTOM           0x00ff0000
169 #define HID_UP_LOGIVENDOR       0xffbc0000
170 #define HID_UP_SENSOR           0x00200000
171
172 #define HID_USAGE               0x0000ffff
173
174 #define HID_GD_POINTER          0x00010001
175 #define HID_GD_MOUSE            0x00010002
176 #define HID_GD_JOYSTICK         0x00010004
177 #define HID_GD_GAMEPAD          0x00010005
178 #define HID_GD_KEYBOARD         0x00010006
179 #define HID_GD_KEYPAD           0x00010007
180 #define HID_GD_MULTIAXIS        0x00010008
181 #define HID_GD_X                0x00010030
182 #define HID_GD_Y                0x00010031
183 #define HID_GD_Z                0x00010032
184 #define HID_GD_RX               0x00010033
185 #define HID_GD_RY               0x00010034
186 #define HID_GD_RZ               0x00010035
187 #define HID_GD_SLIDER           0x00010036
188 #define HID_GD_DIAL             0x00010037
189 #define HID_GD_WHEEL            0x00010038
190 #define HID_GD_HATSWITCH        0x00010039
191 #define HID_GD_BUFFER           0x0001003a
192 #define HID_GD_BYTECOUNT        0x0001003b
193 #define HID_GD_MOTION           0x0001003c
194 #define HID_GD_START            0x0001003d
195 #define HID_GD_SELECT           0x0001003e
196 #define HID_GD_VX               0x00010040
197 #define HID_GD_VY               0x00010041
198 #define HID_GD_VZ               0x00010042
199 #define HID_GD_VBRX             0x00010043
200 #define HID_GD_VBRY             0x00010044
201 #define HID_GD_VBRZ             0x00010045
202 #define HID_GD_VNO              0x00010046
203 #define HID_GD_FEATURE          0x00010047
204 #define HID_GD_UP               0x00010090
205 #define HID_GD_DOWN             0x00010091
206 #define HID_GD_RIGHT            0x00010092
207 #define HID_GD_LEFT             0x00010093
208
209 #define HID_DC_BATTERYSTRENGTH  0x00060020
210
211 #define HID_DG_DIGITIZER        0x000d0001
212 #define HID_DG_PEN              0x000d0002
213 #define HID_DG_LIGHTPEN         0x000d0003
214 #define HID_DG_TOUCHSCREEN      0x000d0004
215 #define HID_DG_TOUCHPAD         0x000d0005
216 #define HID_DG_STYLUS           0x000d0020
217 #define HID_DG_PUCK             0x000d0021
218 #define HID_DG_FINGER           0x000d0022
219 #define HID_DG_TIPPRESSURE      0x000d0030
220 #define HID_DG_BARRELPRESSURE   0x000d0031
221 #define HID_DG_INRANGE          0x000d0032
222 #define HID_DG_TOUCH            0x000d0033
223 #define HID_DG_UNTOUCH          0x000d0034
224 #define HID_DG_TAP              0x000d0035
225 #define HID_DG_TABLETFUNCTIONKEY        0x000d0039
226 #define HID_DG_PROGRAMCHANGEKEY 0x000d003a
227 #define HID_DG_INVERT           0x000d003c
228 #define HID_DG_TIPSWITCH        0x000d0042
229 #define HID_DG_TIPSWITCH2       0x000d0043
230 #define HID_DG_BARRELSWITCH     0x000d0044
231 #define HID_DG_ERASER           0x000d0045
232 #define HID_DG_TABLETPICK       0x000d0046
233 /*
234  * as of May 20, 2009 the usages below are not yet in the official USB spec
235  * but are being pushed by Microsft as described in their paper "Digitizer
236  * Drivers for Windows Touch and Pen-Based Computers"
237  */
238 #define HID_DG_CONFIDENCE       0x000d0047
239 #define HID_DG_WIDTH            0x000d0048
240 #define HID_DG_HEIGHT           0x000d0049
241 #define HID_DG_CONTACTID        0x000d0051
242 #define HID_DG_INPUTMODE        0x000d0052
243 #define HID_DG_DEVICEINDEX      0x000d0053
244 #define HID_DG_CONTACTCOUNT     0x000d0054
245 #define HID_DG_CONTACTMAX       0x000d0055
246
247 /*
248  * HID report types --- Ouch! HID spec says 1 2 3!
249  */
250
251 #define HID_INPUT_REPORT        0
252 #define HID_OUTPUT_REPORT       1
253 #define HID_FEATURE_REPORT      2
254
255 /*
256  * HID connect requests
257  */
258
259 #define HID_CONNECT_HIDINPUT            0x01
260 #define HID_CONNECT_HIDINPUT_FORCE      0x02
261 #define HID_CONNECT_HIDRAW              0x04
262 #define HID_CONNECT_HIDDEV              0x08
263 #define HID_CONNECT_HIDDEV_FORCE        0x10
264 #define HID_CONNECT_FF                  0x20
265 #define HID_CONNECT_DEFAULT     (HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
266                 HID_CONNECT_HIDDEV|HID_CONNECT_FF)
267
268 /*
269  * HID device quirks.
270  */
271
272 /* 
273  * Increase this if you need to configure more HID quirks at module load time
274  */
275 #define MAX_USBHID_BOOT_QUIRKS 4
276
277 #define HID_QUIRK_INVERT                        0x00000001
278 #define HID_QUIRK_NOTOUCH                       0x00000002
279 #define HID_QUIRK_IGNORE                        0x00000004
280 #define HID_QUIRK_NOGET                         0x00000008
281 #define HID_QUIRK_HIDDEV_FORCE                  0x00000010
282 #define HID_QUIRK_BADPAD                        0x00000020
283 #define HID_QUIRK_MULTI_INPUT                   0x00000040
284 #define HID_QUIRK_HIDINPUT_FORCE                0x00000080
285 #define HID_QUIRK_NO_EMPTY_INPUT                0x00000100
286 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           0x00010000
287 #define HID_QUIRK_FULLSPEED_INTERVAL            0x10000000
288 #define HID_QUIRK_NO_INIT_REPORTS               0x20000000
289 #define HID_QUIRK_NO_IGNORE                     0x40000000
290 #define HID_QUIRK_NO_INPUT_SYNC                 0x80000000
291
292 /*
293  * HID device groups
294  */
295 #define HID_GROUP_GENERIC                       0x0001
296 #define HID_GROUP_MULTITOUCH                    0x0002
297 #define HID_GROUP_SENSOR_HUB                    0x0003
298
299 /*
300  * This is the global environment of the parser. This information is
301  * persistent for main-items. The global environment can be saved and
302  * restored with PUSH/POP statements.
303  */
304
305 struct hid_global {
306         unsigned usage_page;
307         __s32    logical_minimum;
308         __s32    logical_maximum;
309         __s32    physical_minimum;
310         __s32    physical_maximum;
311         __s32    unit_exponent;
312         unsigned unit;
313         unsigned report_id;
314         unsigned report_size;
315         unsigned report_count;
316 };
317
318 /*
319  * This is the local environment. It is persistent up the next main-item.
320  */
321
322 #define HID_MAX_USAGES                  12288
323 #define HID_DEFAULT_NUM_COLLECTIONS     16
324
325 struct hid_local {
326         unsigned usage[HID_MAX_USAGES]; /* usage array */
327         unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
328         unsigned usage_index;
329         unsigned usage_minimum;
330         unsigned delimiter_depth;
331         unsigned delimiter_branch;
332 };
333
334 /*
335  * This is the collection stack. We climb up the stack to determine
336  * application and function of each field.
337  */
338
339 struct hid_collection {
340         unsigned type;
341         unsigned usage;
342         unsigned level;
343 };
344
345 struct hid_usage {
346         unsigned  hid;                  /* hid usage code */
347         unsigned  collection_index;     /* index into collection array */
348         unsigned  usage_index;          /* index into usage array */
349         /* hidinput data */
350         __u16     code;                 /* input driver code */
351         __u8      type;                 /* input driver type */
352         __s8      hat_min;              /* hat switch fun */
353         __s8      hat_max;              /* ditto */
354         __s8      hat_dir;              /* ditto */
355 };
356
357 struct hid_input;
358
359 struct hid_field {
360         unsigned  physical;             /* physical usage for this field */
361         unsigned  logical;              /* logical usage for this field */
362         unsigned  application;          /* application usage for this field */
363         struct hid_usage *usage;        /* usage table for this function */
364         unsigned  maxusage;             /* maximum usage index */
365         unsigned  flags;                /* main-item flags (i.e. volatile,array,constant) */
366         unsigned  report_offset;        /* bit offset in the report */
367         unsigned  report_size;          /* size of this field in the report */
368         unsigned  report_count;         /* number of this field in the report */
369         unsigned  report_type;          /* (input,output,feature) */
370         __s32    *value;                /* last known value(s) */
371         __s32     logical_minimum;
372         __s32     logical_maximum;
373         __s32     physical_minimum;
374         __s32     physical_maximum;
375         __s32     unit_exponent;
376         unsigned  unit;
377         struct hid_report *report;      /* associated report */
378         unsigned index;                 /* index into report->field[] */
379         /* hidinput data */
380         struct hid_input *hidinput;     /* associated input structure */
381         __u16 dpad;                     /* dpad input code */
382 };
383
384 #define HID_MAX_FIELDS 256
385
386 struct hid_report {
387         struct list_head list;
388         unsigned id;                                    /* id of this report */
389         unsigned type;                                  /* report type */
390         struct hid_field *field[HID_MAX_FIELDS];        /* fields of the report */
391         unsigned maxfield;                              /* maximum valid field index */
392         unsigned size;                                  /* size of the report (bits) */
393         struct hid_device *device;                      /* associated device */
394 };
395
396 struct hid_report_enum {
397         unsigned numbered;
398         struct list_head report_list;
399         struct hid_report *report_id_hash[256];
400 };
401
402 #define HID_REPORT_TYPES 3
403
404 #define HID_MIN_BUFFER_SIZE     64              /* make sure there is at least a packet size of space */
405 #define HID_MAX_BUFFER_SIZE     4096            /* 4kb */
406 #define HID_CONTROL_FIFO_SIZE   256             /* to init devices with >100 reports */
407 #define HID_OUTPUT_FIFO_SIZE    64
408
409 struct hid_control_fifo {
410         unsigned char dir;
411         struct hid_report *report;
412         char *raw_report;
413 };
414
415 struct hid_output_fifo {
416         struct hid_report *report;
417         char *raw_report;
418 };
419
420 #define HID_CLAIMED_INPUT       1
421 #define HID_CLAIMED_HIDDEV      2
422 #define HID_CLAIMED_HIDRAW      4
423
424 #define HID_STAT_ADDED          1
425 #define HID_STAT_PARSED         2
426
427 struct hid_input {
428         struct list_head list;
429         struct hid_report *report;
430         struct input_dev *input;
431 };
432
433 enum hid_type {
434         HID_TYPE_OTHER = 0,
435         HID_TYPE_USBMOUSE,
436         HID_TYPE_USBNONE
437 };
438
439 struct hid_driver;
440 struct hid_ll_driver;
441
442 struct hid_device {                                                     /* device report descriptor */
443         __u8 *dev_rdesc;
444         unsigned dev_rsize;
445         __u8 *rdesc;
446         unsigned rsize;
447         struct hid_collection *collection;                              /* List of HID collections */
448         unsigned collection_size;                                       /* Number of allocated hid_collections */
449         unsigned maxcollection;                                         /* Number of parsed collections */
450         unsigned maxapplication;                                        /* Number of applications */
451         __u16 bus;                                                      /* BUS ID */
452         __u16 group;                                                    /* Report group */
453         __u32 vendor;                                                   /* Vendor ID */
454         __u32 product;                                                  /* Product ID */
455         __u32 version;                                                  /* HID version */
456         enum hid_type type;                                             /* device type (mouse, kbd, ...) */
457         unsigned country;                                               /* HID country */
458         struct hid_report_enum report_enum[HID_REPORT_TYPES];
459
460         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
461         struct semaphore driver_input_lock;                             /* protects the current driver */
462         struct device dev;                                              /* device */
463         struct hid_driver *driver;
464         struct hid_ll_driver *ll_driver;
465
466 #ifdef CONFIG_HID_BATTERY_STRENGTH
467         /*
468          * Power supply information for HID devices which report
469          * battery strength. power_supply is registered iff
470          * battery.name is non-NULL.
471          */
472         struct power_supply battery;
473         __s32 battery_min;
474         __s32 battery_max;
475         __s32 battery_report_type;
476         __s32 battery_report_id;
477 #endif
478
479         unsigned int status;                                            /* see STAT flags above */
480         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
481         unsigned quirks;                                                /* Various quirks the device can pull on us */
482         bool io_started;                                                /* Protected by driver_lock. If IO has started */
483
484         struct list_head inputs;                                        /* The list of inputs */
485         void *hiddev;                                                   /* The hiddev structure */
486         void *hidraw;
487         int minor;                                                      /* Hiddev minor number */
488
489         int open;                                                       /* is the device open by anyone? */
490         char name[128];                                                 /* Device name */
491         char phys[64];                                                  /* Device physical location */
492         char uniq[64];                                                  /* Device unique identifier (serial #) */
493
494         void *driver_data;
495
496         /* temporary hid_ff handling (until moved to the drivers) */
497         int (*ff_init)(struct hid_device *);
498
499         /* hiddev event handler */
500         int (*hiddev_connect)(struct hid_device *, unsigned int);
501         void (*hiddev_disconnect)(struct hid_device *);
502         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
503                                   struct hid_usage *, __s32);
504         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
505
506         /* handler for raw input (Get_Report) data, used by hidraw */
507         int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
508
509         /* handler for raw output data, used by hidraw */
510         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
511
512         /* debugging support via debugfs */
513         unsigned short debug;
514         struct dentry *debug_dir;
515         struct dentry *debug_rdesc;
516         struct dentry *debug_events;
517         struct list_head debug_list;
518         spinlock_t  debug_list_lock;
519         wait_queue_head_t debug_wait;
520 };
521
522 static inline void *hid_get_drvdata(struct hid_device *hdev)
523 {
524         return dev_get_drvdata(&hdev->dev);
525 }
526
527 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
528 {
529         dev_set_drvdata(&hdev->dev, data);
530 }
531
532 #define HID_GLOBAL_STACK_SIZE 4
533 #define HID_COLLECTION_STACK_SIZE 4
534
535 struct hid_parser {
536         struct hid_global     global;
537         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
538         unsigned              global_stack_ptr;
539         struct hid_local      local;
540         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
541         unsigned              collection_stack_ptr;
542         struct hid_device    *device;
543 };
544
545 struct hid_class_descriptor {
546         __u8  bDescriptorType;
547         __le16 wDescriptorLength;
548 } __attribute__ ((packed));
549
550 struct hid_descriptor {
551         __u8  bLength;
552         __u8  bDescriptorType;
553         __le16 bcdHID;
554         __u8  bCountryCode;
555         __u8  bNumDescriptors;
556
557         struct hid_class_descriptor desc[1];
558 } __attribute__ ((packed));
559
560 #define HID_DEVICE(b, g, ven, prod)                                     \
561         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
562 #define HID_USB_DEVICE(ven, prod)                               \
563         .bus = BUS_USB, .vendor = (ven), .product = (prod)
564 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
565         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
566
567 #define HID_REPORT_ID(rep) \
568         .report_type = (rep)
569 #define HID_USAGE_ID(uhid, utype, ucode) \
570         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
571 /* we don't want to catch types and codes equal to 0 */
572 #define HID_TERMINATOR          (HID_ANY_ID - 1)
573
574 struct hid_report_id {
575         __u32 report_type;
576 };
577 struct hid_usage_id {
578         __u32 usage_hid;
579         __u32 usage_type;
580         __u32 usage_code;
581 };
582
583 /**
584  * struct hid_driver
585  * @name: driver name (e.g. "Footech_bar-wheel")
586  * @id_table: which devices is this driver for (must be non-NULL for probe
587  *            to be called)
588  * @dyn_list: list of dynamically added device ids
589  * @dyn_lock: lock protecting @dyn_list
590  * @probe: new device inserted
591  * @remove: device removed (NULL if not a hot-plug capable driver)
592  * @report_table: on which reports to call raw_event (NULL means all)
593  * @raw_event: if report in report_table, this hook is called (NULL means nop)
594  * @usage_table: on which events to call event (NULL means all)
595  * @event: if usage in usage_table, this hook is called (NULL means nop)
596  * @report: this hook is called after parsing a report (NULL means nop)
597  * @report_fixup: called before report descriptor parsing (NULL means nop)
598  * @input_mapping: invoked on input registering before mapping an usage
599  * @input_mapped: invoked on input registering after mapping an usage
600  * @input_configured: invoked just before the device is registered
601  * @feature_mapping: invoked on feature registering
602  * @suspend: invoked on suspend (NULL means nop)
603  * @resume: invoked on resume if device was not reset (NULL means nop)
604  * @reset_resume: invoked on resume if device was reset (NULL means nop)
605  *
606  * probe should return -errno on error, or 0 on success. During probe,
607  * input will not be passed to raw_event unless hid_device_io_start is
608  * called.
609  *
610  * raw_event and event should return 0 on no action performed, 1 when no
611  * further processing should be done and negative on error
612  *
613  * input_mapping shall return a negative value to completely ignore this usage
614  * (e.g. doubled or invalid usage), zero to continue with parsing of this
615  * usage by generic code (no special handling needed) or positive to skip
616  * generic parsing (needed special handling which was done in the hook already)
617  * input_mapped shall return negative to inform the layer that this usage
618  * should not be considered for further processing or zero to notify that
619  * no processing was performed and should be done in a generic manner
620  * Both these functions may be NULL which means the same behavior as returning
621  * zero from them.
622  */
623 struct hid_driver {
624         char *name;
625         const struct hid_device_id *id_table;
626
627         struct list_head dyn_list;
628         spinlock_t dyn_lock;
629
630         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
631         void (*remove)(struct hid_device *dev);
632
633         const struct hid_report_id *report_table;
634         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
635                         u8 *data, int size);
636         const struct hid_usage_id *usage_table;
637         int (*event)(struct hid_device *hdev, struct hid_field *field,
638                         struct hid_usage *usage, __s32 value);
639         void (*report)(struct hid_device *hdev, struct hid_report *report);
640
641         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
642                         unsigned int *size);
643
644         int (*input_mapping)(struct hid_device *hdev,
645                         struct hid_input *hidinput, struct hid_field *field,
646                         struct hid_usage *usage, unsigned long **bit, int *max);
647         int (*input_mapped)(struct hid_device *hdev,
648                         struct hid_input *hidinput, struct hid_field *field,
649                         struct hid_usage *usage, unsigned long **bit, int *max);
650         void (*input_configured)(struct hid_device *hdev,
651                                  struct hid_input *hidinput);
652         void (*feature_mapping)(struct hid_device *hdev,
653                         struct hid_field *field,
654                         struct hid_usage *usage);
655 #ifdef CONFIG_PM
656         int (*suspend)(struct hid_device *hdev, pm_message_t message);
657         int (*resume)(struct hid_device *hdev);
658         int (*reset_resume)(struct hid_device *hdev);
659 #endif
660 /* private: */
661         struct device_driver driver;
662 };
663
664 /**
665  * hid_ll_driver - low level driver callbacks
666  * @start: called on probe to start the device
667  * @stop: called on remove
668  * @open: called by input layer on open
669  * @close: called by input layer on close
670  * @hidinput_input_event: event input event (e.g. ff or leds)
671  * @parse: this method is called only once to parse the device data,
672  *         shouldn't allocate anything to not leak memory
673  * @request: send report request to device (e.g. feature report)
674  * @wait: wait for buffered io to complete (send/recv reports)
675  * @idle: send idle request to device
676  */
677 struct hid_ll_driver {
678         int (*start)(struct hid_device *hdev);
679         void (*stop)(struct hid_device *hdev);
680
681         int (*open)(struct hid_device *hdev);
682         void (*close)(struct hid_device *hdev);
683
684         int (*power)(struct hid_device *hdev, int level);
685
686         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
687                         unsigned int code, int value);
688
689         int (*parse)(struct hid_device *hdev);
690
691         void (*request)(struct hid_device *hdev,
692                         struct hid_report *report, int reqtype);
693
694         int (*wait)(struct hid_device *hdev);
695         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
696
697 };
698
699 #define PM_HINT_FULLON  1<<5
700 #define PM_HINT_NORMAL  1<<1
701
702 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
703 /* We ignore a few input applications that are not widely used */
704 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
705
706 /* HID core API */
707
708 extern int hid_debug;
709
710 extern bool hid_ignore(struct hid_device *);
711 extern int hid_add_device(struct hid_device *);
712 extern void hid_destroy_device(struct hid_device *);
713
714 extern int __must_check __hid_register_driver(struct hid_driver *,
715                 struct module *, const char *mod_name);
716
717 /* use a define to avoid include chaining to get THIS_MODULE & friends */
718 #define hid_register_driver(driver) \
719         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
720
721 extern void hid_unregister_driver(struct hid_driver *);
722
723 /**
724  * module_hid_driver() - Helper macro for registering a HID driver
725  * @__hid_driver: hid_driver struct
726  *
727  * Helper macro for HID drivers which do not do anything special in module
728  * init/exit. This eliminates a lot of boilerplate. Each module may only
729  * use this macro once, and calling it replaces module_init() and module_exit()
730  */
731 #define module_hid_driver(__hid_driver) \
732         module_driver(__hid_driver, hid_register_driver, \
733                       hid_unregister_driver)
734
735 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
736 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
737 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
738 extern void hidinput_disconnect(struct hid_device *);
739
740 int hid_set_field(struct hid_field *, unsigned, __s32);
741 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
742 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
743 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
744 unsigned int hidinput_count_leds(struct hid_device *hid);
745 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
746 void hid_output_report(struct hid_report *report, __u8 *data);
747 struct hid_device *hid_allocate_device(void);
748 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
749 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
750 int hid_open_report(struct hid_device *device);
751 int hid_check_keys_pressed(struct hid_device *hid);
752 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
753 void hid_disconnect(struct hid_device *hid);
754 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
755                                          const struct hid_device_id *id);
756 s32 hid_snto32(__u32 value, unsigned n);
757
758 /**
759  * hid_device_io_start - enable HID input during probe, remove
760  *
761  * @hid - the device
762  *
763  * This should only be called during probe or remove and only be
764  * called by the thread calling probe or remove. It will allow
765  * incoming packets to be delivered to the driver.
766  */
767 static inline void hid_device_io_start(struct hid_device *hid) {
768         if (hid->io_started) {
769                 dev_warn(&hid->dev, "io already started");
770                 return;
771         }
772         hid->io_started = true;
773         up(&hid->driver_input_lock);
774 }
775
776 /**
777  * hid_device_io_stop - disable HID input during probe, remove
778  *
779  * @hid - the device
780  *
781  * Should only be called after hid_device_io_start. It will prevent
782  * incoming packets from going to the driver for the duration of
783  * probe, remove. If called during probe, packets will still go to the
784  * driver after probe is complete. This function should only be called
785  * by the thread calling probe or remove.
786  */
787 static inline void hid_device_io_stop(struct hid_device *hid) {
788         if (!hid->io_started) {
789                 dev_warn(&hid->dev, "io already stopped");
790                 return;
791         }
792         hid->io_started = false;
793         down(&hid->driver_input_lock);
794 }
795
796 /**
797  * hid_map_usage - map usage input bits
798  *
799  * @hidinput: hidinput which we are interested in
800  * @usage: usage to fill in
801  * @bit: pointer to input->{}bit (out parameter)
802  * @max: maximal valid usage->code to consider later (out parameter)
803  * @type: input event type (EV_KEY, EV_REL, ...)
804  * @c: code which corresponds to this usage and type
805  */
806 static inline void hid_map_usage(struct hid_input *hidinput,
807                 struct hid_usage *usage, unsigned long **bit, int *max,
808                 __u8 type, __u16 c)
809 {
810         struct input_dev *input = hidinput->input;
811
812         usage->type = type;
813         usage->code = c;
814
815         switch (type) {
816         case EV_ABS:
817                 *bit = input->absbit;
818                 *max = ABS_MAX;
819                 break;
820         case EV_REL:
821                 *bit = input->relbit;
822                 *max = REL_MAX;
823                 break;
824         case EV_KEY:
825                 *bit = input->keybit;
826                 *max = KEY_MAX;
827                 break;
828         case EV_LED:
829                 *bit = input->ledbit;
830                 *max = LED_MAX;
831                 break;
832         }
833 }
834
835 /**
836  * hid_map_usage_clear - map usage input bits and clear the input bit
837  *
838  * The same as hid_map_usage, except the @c bit is also cleared in supported
839  * bits (@bit).
840  */
841 static inline void hid_map_usage_clear(struct hid_input *hidinput,
842                 struct hid_usage *usage, unsigned long **bit, int *max,
843                 __u8 type, __u16 c)
844 {
845         hid_map_usage(hidinput, usage, bit, max, type, c);
846         clear_bit(c, *bit);
847 }
848
849 /**
850  * hid_parse - parse HW reports
851  *
852  * @hdev: hid device
853  *
854  * Call this from probe after you set up the device (if needed). Your
855  * report_fixup will be called (if non-NULL) after reading raw report from
856  * device before passing it to hid layer for real parsing.
857  */
858 static inline int __must_check hid_parse(struct hid_device *hdev)
859 {
860         return hid_open_report(hdev);
861 }
862
863 /**
864  * hid_hw_start - start underlaying HW
865  *
866  * @hdev: hid device
867  * @connect_mask: which outputs to connect, see HID_CONNECT_*
868  *
869  * Call this in probe function *after* hid_parse. This will setup HW buffers
870  * and start the device (if not deffered to device open). hid_hw_stop must be
871  * called if this was successful.
872  */
873 static inline int __must_check hid_hw_start(struct hid_device *hdev,
874                 unsigned int connect_mask)
875 {
876         int ret = hdev->ll_driver->start(hdev);
877         if (ret || !connect_mask)
878                 return ret;
879         ret = hid_connect(hdev, connect_mask);
880         if (ret)
881                 hdev->ll_driver->stop(hdev);
882         return ret;
883 }
884
885 /**
886  * hid_hw_stop - stop underlaying HW
887  *
888  * @hdev: hid device
889  *
890  * This is usually called from remove function or from probe when something
891  * failed and hid_hw_start was called already.
892  */
893 static inline void hid_hw_stop(struct hid_device *hdev)
894 {
895         hid_disconnect(hdev);
896         hdev->ll_driver->stop(hdev);
897 }
898
899 /**
900  * hid_hw_open - signal underlaying HW to start delivering events
901  *
902  * @hdev: hid device
903  *
904  * Tell underlying HW to start delivering events from the device.
905  * This function should be called sometime after successful call
906  * to hid_hiw_start().
907  */
908 static inline int __must_check hid_hw_open(struct hid_device *hdev)
909 {
910         return hdev->ll_driver->open(hdev);
911 }
912
913 /**
914  * hid_hw_close - signal underlaying HW to stop delivering events
915  *
916  * @hdev: hid device
917  *
918  * This function indicates that we are not interested in the events
919  * from this device anymore. Delivery of events may or may not stop,
920  * depending on the number of users still outstanding.
921  */
922 static inline void hid_hw_close(struct hid_device *hdev)
923 {
924         hdev->ll_driver->close(hdev);
925 }
926
927 /**
928  * hid_hw_power - requests underlying HW to go into given power mode
929  *
930  * @hdev: hid device
931  * @level: requested power level (one of %PM_HINT_* defines)
932  *
933  * This function requests underlying hardware to enter requested power
934  * mode.
935  */
936
937 static inline int hid_hw_power(struct hid_device *hdev, int level)
938 {
939         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
940 }
941
942
943 /**
944  * hid_hw_request - send report request to device
945  *
946  * @hdev: hid device
947  * @report: report to send
948  * @reqtype: hid request type
949  */
950 static inline void hid_hw_request(struct hid_device *hdev,
951                                   struct hid_report *report, int reqtype)
952 {
953         if (hdev->ll_driver->request)
954                 hdev->ll_driver->request(hdev, report, reqtype);
955 }
956
957 /**
958  * hid_hw_idle - send idle request to device
959  *
960  * @hdev: hid device
961  * @report: report to control
962  * @idle: idle state
963  * @reqtype: hid request type
964  */
965 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
966                 int reqtype)
967 {
968         if (hdev->ll_driver->idle)
969                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
970
971         return 0;
972 }
973
974 /**
975  * hid_hw_wait - wait for buffered io to complete
976  *
977  * @hdev: hid device
978  */
979 static inline void hid_hw_wait(struct hid_device *hdev)
980 {
981         if (hdev->ll_driver->wait)
982                 hdev->ll_driver->wait(hdev);
983 }
984
985 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
986                 int interrupt);
987
988 /* HID quirks API */
989 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
990 int usbhid_quirks_init(char **quirks_param);
991 void usbhid_quirks_exit(void);
992 void usbhid_set_leds(struct hid_device *hid);
993
994 #ifdef CONFIG_HID_PID
995 int hid_pidff_init(struct hid_device *hid);
996 #else
997 #define hid_pidff_init NULL
998 #endif
999
1000 #define dbg_hid(format, arg...)                                         \
1001 do {                                                                    \
1002         if (hid_debug)                                                  \
1003                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1004 } while (0)
1005
1006 #define hid_printk(level, hid, fmt, arg...)             \
1007         dev_printk(level, &(hid)->dev, fmt, ##arg)
1008 #define hid_emerg(hid, fmt, arg...)                     \
1009         dev_emerg(&(hid)->dev, fmt, ##arg)
1010 #define hid_crit(hid, fmt, arg...)                      \
1011         dev_crit(&(hid)->dev, fmt, ##arg)
1012 #define hid_alert(hid, fmt, arg...)                     \
1013         dev_alert(&(hid)->dev, fmt, ##arg)
1014 #define hid_err(hid, fmt, arg...)                       \
1015         dev_err(&(hid)->dev, fmt, ##arg)
1016 #define hid_notice(hid, fmt, arg...)                    \
1017         dev_notice(&(hid)->dev, fmt, ##arg)
1018 #define hid_warn(hid, fmt, arg...)                      \
1019         dev_warn(&(hid)->dev, fmt, ##arg)
1020 #define hid_info(hid, fmt, arg...)                      \
1021         dev_info(&(hid)->dev, fmt, ##arg)
1022 #define hid_dbg(hid, fmt, arg...)                       \
1023         dev_dbg(&(hid)->dev, fmt, ##arg)
1024
1025 #endif