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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         struct work_struct led_work;                                    /* delayed LED worker */
460
461         struct semaphore driver_lock;                                   /* protects the current driver, except during input */
462         struct semaphore driver_input_lock;                             /* protects the current driver */
463         struct device dev;                                              /* device */
464         struct hid_driver *driver;
465         struct hid_ll_driver *ll_driver;
466
467 #ifdef CONFIG_HID_BATTERY_STRENGTH
468         /*
469          * Power supply information for HID devices which report
470          * battery strength. power_supply is registered iff
471          * battery.name is non-NULL.
472          */
473         struct power_supply battery;
474         __s32 battery_min;
475         __s32 battery_max;
476         __s32 battery_report_type;
477         __s32 battery_report_id;
478 #endif
479
480         unsigned int status;                                            /* see STAT flags above */
481         unsigned claimed;                                               /* Claimed by hidinput, hiddev? */
482         unsigned quirks;                                                /* Various quirks the device can pull on us */
483         bool io_started;                                                /* Protected by driver_lock. If IO has started */
484
485         struct list_head inputs;                                        /* The list of inputs */
486         void *hiddev;                                                   /* The hiddev structure */
487         void *hidraw;
488         int minor;                                                      /* Hiddev minor number */
489
490         int open;                                                       /* is the device open by anyone? */
491         char name[128];                                                 /* Device name */
492         char phys[64];                                                  /* Device physical location */
493         char uniq[64];                                                  /* Device unique identifier (serial #) */
494
495         void *driver_data;
496
497         /* temporary hid_ff handling (until moved to the drivers) */
498         int (*ff_init)(struct hid_device *);
499
500         /* hiddev event handler */
501         int (*hiddev_connect)(struct hid_device *, unsigned int);
502         void (*hiddev_disconnect)(struct hid_device *);
503         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
504                                   struct hid_usage *, __s32);
505         void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
506
507         /* handler for raw input (Get_Report) data, used by hidraw */
508         int (*hid_get_raw_report) (struct hid_device *, unsigned char, __u8 *, size_t, unsigned char);
509
510         /* handler for raw output data, used by hidraw */
511         int (*hid_output_raw_report) (struct hid_device *, __u8 *, size_t, unsigned char);
512
513         /* debugging support via debugfs */
514         unsigned short debug;
515         struct dentry *debug_dir;
516         struct dentry *debug_rdesc;
517         struct dentry *debug_events;
518         struct list_head debug_list;
519         spinlock_t  debug_list_lock;
520         wait_queue_head_t debug_wait;
521 };
522
523 static inline void *hid_get_drvdata(struct hid_device *hdev)
524 {
525         return dev_get_drvdata(&hdev->dev);
526 }
527
528 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
529 {
530         dev_set_drvdata(&hdev->dev, data);
531 }
532
533 #define HID_GLOBAL_STACK_SIZE 4
534 #define HID_COLLECTION_STACK_SIZE 4
535
536 struct hid_parser {
537         struct hid_global     global;
538         struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
539         unsigned              global_stack_ptr;
540         struct hid_local      local;
541         unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
542         unsigned              collection_stack_ptr;
543         struct hid_device    *device;
544 };
545
546 struct hid_class_descriptor {
547         __u8  bDescriptorType;
548         __le16 wDescriptorLength;
549 } __attribute__ ((packed));
550
551 struct hid_descriptor {
552         __u8  bLength;
553         __u8  bDescriptorType;
554         __le16 bcdHID;
555         __u8  bCountryCode;
556         __u8  bNumDescriptors;
557
558         struct hid_class_descriptor desc[1];
559 } __attribute__ ((packed));
560
561 #define HID_DEVICE(b, g, ven, prod)                                     \
562         .bus = (b), .group = (g), .vendor = (ven), .product = (prod)
563 #define HID_USB_DEVICE(ven, prod)                               \
564         .bus = BUS_USB, .vendor = (ven), .product = (prod)
565 #define HID_BLUETOOTH_DEVICE(ven, prod)                                 \
566         .bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
567
568 #define HID_REPORT_ID(rep) \
569         .report_type = (rep)
570 #define HID_USAGE_ID(uhid, utype, ucode) \
571         .usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
572 /* we don't want to catch types and codes equal to 0 */
573 #define HID_TERMINATOR          (HID_ANY_ID - 1)
574
575 struct hid_report_id {
576         __u32 report_type;
577 };
578 struct hid_usage_id {
579         __u32 usage_hid;
580         __u32 usage_type;
581         __u32 usage_code;
582 };
583
584 /**
585  * struct hid_driver
586  * @name: driver name (e.g. "Footech_bar-wheel")
587  * @id_table: which devices is this driver for (must be non-NULL for probe
588  *            to be called)
589  * @dyn_list: list of dynamically added device ids
590  * @dyn_lock: lock protecting @dyn_list
591  * @probe: new device inserted
592  * @remove: device removed (NULL if not a hot-plug capable driver)
593  * @report_table: on which reports to call raw_event (NULL means all)
594  * @raw_event: if report in report_table, this hook is called (NULL means nop)
595  * @usage_table: on which events to call event (NULL means all)
596  * @event: if usage in usage_table, this hook is called (NULL means nop)
597  * @report: this hook is called after parsing a report (NULL means nop)
598  * @report_fixup: called before report descriptor parsing (NULL means nop)
599  * @input_mapping: invoked on input registering before mapping an usage
600  * @input_mapped: invoked on input registering after mapping an usage
601  * @input_configured: invoked just before the device is registered
602  * @feature_mapping: invoked on feature registering
603  * @suspend: invoked on suspend (NULL means nop)
604  * @resume: invoked on resume if device was not reset (NULL means nop)
605  * @reset_resume: invoked on resume if device was reset (NULL means nop)
606  *
607  * probe should return -errno on error, or 0 on success. During probe,
608  * input will not be passed to raw_event unless hid_device_io_start is
609  * called.
610  *
611  * raw_event and event should return 0 on no action performed, 1 when no
612  * further processing should be done and negative on error
613  *
614  * input_mapping shall return a negative value to completely ignore this usage
615  * (e.g. doubled or invalid usage), zero to continue with parsing of this
616  * usage by generic code (no special handling needed) or positive to skip
617  * generic parsing (needed special handling which was done in the hook already)
618  * input_mapped shall return negative to inform the layer that this usage
619  * should not be considered for further processing or zero to notify that
620  * no processing was performed and should be done in a generic manner
621  * Both these functions may be NULL which means the same behavior as returning
622  * zero from them.
623  */
624 struct hid_driver {
625         char *name;
626         const struct hid_device_id *id_table;
627
628         struct list_head dyn_list;
629         spinlock_t dyn_lock;
630
631         int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
632         void (*remove)(struct hid_device *dev);
633
634         const struct hid_report_id *report_table;
635         int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
636                         u8 *data, int size);
637         const struct hid_usage_id *usage_table;
638         int (*event)(struct hid_device *hdev, struct hid_field *field,
639                         struct hid_usage *usage, __s32 value);
640         void (*report)(struct hid_device *hdev, struct hid_report *report);
641
642         __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
643                         unsigned int *size);
644
645         int (*input_mapping)(struct hid_device *hdev,
646                         struct hid_input *hidinput, struct hid_field *field,
647                         struct hid_usage *usage, unsigned long **bit, int *max);
648         int (*input_mapped)(struct hid_device *hdev,
649                         struct hid_input *hidinput, struct hid_field *field,
650                         struct hid_usage *usage, unsigned long **bit, int *max);
651         void (*input_configured)(struct hid_device *hdev,
652                                  struct hid_input *hidinput);
653         void (*feature_mapping)(struct hid_device *hdev,
654                         struct hid_field *field,
655                         struct hid_usage *usage);
656 #ifdef CONFIG_PM
657         int (*suspend)(struct hid_device *hdev, pm_message_t message);
658         int (*resume)(struct hid_device *hdev);
659         int (*reset_resume)(struct hid_device *hdev);
660 #endif
661 /* private: */
662         struct device_driver driver;
663 };
664
665 /**
666  * hid_ll_driver - low level driver callbacks
667  * @start: called on probe to start the device
668  * @stop: called on remove
669  * @open: called by input layer on open
670  * @close: called by input layer on close
671  * @hidinput_input_event: event input event (e.g. ff or leds)
672  * @parse: this method is called only once to parse the device data,
673  *         shouldn't allocate anything to not leak memory
674  * @request: send report request to device (e.g. feature report)
675  * @wait: wait for buffered io to complete (send/recv reports)
676  * @idle: send idle request to device
677  */
678 struct hid_ll_driver {
679         int (*start)(struct hid_device *hdev);
680         void (*stop)(struct hid_device *hdev);
681
682         int (*open)(struct hid_device *hdev);
683         void (*close)(struct hid_device *hdev);
684
685         int (*power)(struct hid_device *hdev, int level);
686
687         int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
688                         unsigned int code, int value);
689
690         int (*parse)(struct hid_device *hdev);
691
692         void (*request)(struct hid_device *hdev,
693                         struct hid_report *report, int reqtype);
694
695         int (*wait)(struct hid_device *hdev);
696         int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
697
698 };
699
700 #define PM_HINT_FULLON  1<<5
701 #define PM_HINT_NORMAL  1<<1
702
703 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
704 /* We ignore a few input applications that are not widely used */
705 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
706
707 /* HID core API */
708
709 extern int hid_debug;
710
711 extern bool hid_ignore(struct hid_device *);
712 extern int hid_add_device(struct hid_device *);
713 extern void hid_destroy_device(struct hid_device *);
714
715 extern int __must_check __hid_register_driver(struct hid_driver *,
716                 struct module *, const char *mod_name);
717
718 /* use a define to avoid include chaining to get THIS_MODULE & friends */
719 #define hid_register_driver(driver) \
720         __hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
721
722 extern void hid_unregister_driver(struct hid_driver *);
723
724 /**
725  * module_hid_driver() - Helper macro for registering a HID driver
726  * @__hid_driver: hid_driver struct
727  *
728  * Helper macro for HID drivers which do not do anything special in module
729  * init/exit. This eliminates a lot of boilerplate. Each module may only
730  * use this macro once, and calling it replaces module_init() and module_exit()
731  */
732 #define module_hid_driver(__hid_driver) \
733         module_driver(__hid_driver, hid_register_driver, \
734                       hid_unregister_driver)
735
736 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
737 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
738 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
739 extern void hidinput_disconnect(struct hid_device *);
740
741 int hid_set_field(struct hid_field *, unsigned, __s32);
742 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
743 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
744 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
745 unsigned int hidinput_count_leds(struct hid_device *hid);
746 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
747 void hid_output_report(struct hid_report *report, __u8 *data);
748 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
749 struct hid_device *hid_allocate_device(void);
750 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
751 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
752 int hid_open_report(struct hid_device *device);
753 int hid_check_keys_pressed(struct hid_device *hid);
754 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
755 void hid_disconnect(struct hid_device *hid);
756 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
757                                          const struct hid_device_id *id);
758 s32 hid_snto32(__u32 value, unsigned n);
759
760 /**
761  * hid_device_io_start - enable HID input during probe, remove
762  *
763  * @hid - the device
764  *
765  * This should only be called during probe or remove and only be
766  * called by the thread calling probe or remove. It will allow
767  * incoming packets to be delivered to the driver.
768  */
769 static inline void hid_device_io_start(struct hid_device *hid) {
770         if (hid->io_started) {
771                 dev_warn(&hid->dev, "io already started");
772                 return;
773         }
774         hid->io_started = true;
775         up(&hid->driver_input_lock);
776 }
777
778 /**
779  * hid_device_io_stop - disable HID input during probe, remove
780  *
781  * @hid - the device
782  *
783  * Should only be called after hid_device_io_start. It will prevent
784  * incoming packets from going to the driver for the duration of
785  * probe, remove. If called during probe, packets will still go to the
786  * driver after probe is complete. This function should only be called
787  * by the thread calling probe or remove.
788  */
789 static inline void hid_device_io_stop(struct hid_device *hid) {
790         if (!hid->io_started) {
791                 dev_warn(&hid->dev, "io already stopped");
792                 return;
793         }
794         hid->io_started = false;
795         down(&hid->driver_input_lock);
796 }
797
798 /**
799  * hid_map_usage - map usage input bits
800  *
801  * @hidinput: hidinput which we are interested in
802  * @usage: usage to fill in
803  * @bit: pointer to input->{}bit (out parameter)
804  * @max: maximal valid usage->code to consider later (out parameter)
805  * @type: input event type (EV_KEY, EV_REL, ...)
806  * @c: code which corresponds to this usage and type
807  */
808 static inline void hid_map_usage(struct hid_input *hidinput,
809                 struct hid_usage *usage, unsigned long **bit, int *max,
810                 __u8 type, __u16 c)
811 {
812         struct input_dev *input = hidinput->input;
813
814         usage->type = type;
815         usage->code = c;
816
817         switch (type) {
818         case EV_ABS:
819                 *bit = input->absbit;
820                 *max = ABS_MAX;
821                 break;
822         case EV_REL:
823                 *bit = input->relbit;
824                 *max = REL_MAX;
825                 break;
826         case EV_KEY:
827                 *bit = input->keybit;
828                 *max = KEY_MAX;
829                 break;
830         case EV_LED:
831                 *bit = input->ledbit;
832                 *max = LED_MAX;
833                 break;
834         }
835 }
836
837 /**
838  * hid_map_usage_clear - map usage input bits and clear the input bit
839  *
840  * The same as hid_map_usage, except the @c bit is also cleared in supported
841  * bits (@bit).
842  */
843 static inline void hid_map_usage_clear(struct hid_input *hidinput,
844                 struct hid_usage *usage, unsigned long **bit, int *max,
845                 __u8 type, __u16 c)
846 {
847         hid_map_usage(hidinput, usage, bit, max, type, c);
848         clear_bit(c, *bit);
849 }
850
851 /**
852  * hid_parse - parse HW reports
853  *
854  * @hdev: hid device
855  *
856  * Call this from probe after you set up the device (if needed). Your
857  * report_fixup will be called (if non-NULL) after reading raw report from
858  * device before passing it to hid layer for real parsing.
859  */
860 static inline int __must_check hid_parse(struct hid_device *hdev)
861 {
862         return hid_open_report(hdev);
863 }
864
865 /**
866  * hid_hw_start - start underlaying HW
867  *
868  * @hdev: hid device
869  * @connect_mask: which outputs to connect, see HID_CONNECT_*
870  *
871  * Call this in probe function *after* hid_parse. This will setup HW buffers
872  * and start the device (if not deffered to device open). hid_hw_stop must be
873  * called if this was successful.
874  */
875 static inline int __must_check hid_hw_start(struct hid_device *hdev,
876                 unsigned int connect_mask)
877 {
878         int ret = hdev->ll_driver->start(hdev);
879         if (ret || !connect_mask)
880                 return ret;
881         ret = hid_connect(hdev, connect_mask);
882         if (ret)
883                 hdev->ll_driver->stop(hdev);
884         return ret;
885 }
886
887 /**
888  * hid_hw_stop - stop underlaying HW
889  *
890  * @hdev: hid device
891  *
892  * This is usually called from remove function or from probe when something
893  * failed and hid_hw_start was called already.
894  */
895 static inline void hid_hw_stop(struct hid_device *hdev)
896 {
897         hid_disconnect(hdev);
898         hdev->ll_driver->stop(hdev);
899 }
900
901 /**
902  * hid_hw_open - signal underlaying HW to start delivering events
903  *
904  * @hdev: hid device
905  *
906  * Tell underlying HW to start delivering events from the device.
907  * This function should be called sometime after successful call
908  * to hid_hiw_start().
909  */
910 static inline int __must_check hid_hw_open(struct hid_device *hdev)
911 {
912         return hdev->ll_driver->open(hdev);
913 }
914
915 /**
916  * hid_hw_close - signal underlaying HW to stop delivering events
917  *
918  * @hdev: hid device
919  *
920  * This function indicates that we are not interested in the events
921  * from this device anymore. Delivery of events may or may not stop,
922  * depending on the number of users still outstanding.
923  */
924 static inline void hid_hw_close(struct hid_device *hdev)
925 {
926         hdev->ll_driver->close(hdev);
927 }
928
929 /**
930  * hid_hw_power - requests underlying HW to go into given power mode
931  *
932  * @hdev: hid device
933  * @level: requested power level (one of %PM_HINT_* defines)
934  *
935  * This function requests underlying hardware to enter requested power
936  * mode.
937  */
938
939 static inline int hid_hw_power(struct hid_device *hdev, int level)
940 {
941         return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
942 }
943
944
945 /**
946  * hid_hw_request - send report request to device
947  *
948  * @hdev: hid device
949  * @report: report to send
950  * @reqtype: hid request type
951  */
952 static inline void hid_hw_request(struct hid_device *hdev,
953                                   struct hid_report *report, int reqtype)
954 {
955         if (hdev->ll_driver->request)
956                 hdev->ll_driver->request(hdev, report, reqtype);
957 }
958
959 /**
960  * hid_hw_idle - send idle request to device
961  *
962  * @hdev: hid device
963  * @report: report to control
964  * @idle: idle state
965  * @reqtype: hid request type
966  */
967 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
968                 int reqtype)
969 {
970         if (hdev->ll_driver->idle)
971                 return hdev->ll_driver->idle(hdev, report, idle, reqtype);
972
973         return 0;
974 }
975
976 /**
977  * hid_hw_wait - wait for buffered io to complete
978  *
979  * @hdev: hid device
980  */
981 static inline void hid_hw_wait(struct hid_device *hdev)
982 {
983         if (hdev->ll_driver->wait)
984                 hdev->ll_driver->wait(hdev);
985 }
986
987 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
988                 int interrupt);
989
990 /* HID quirks API */
991 u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
992 int usbhid_quirks_init(char **quirks_param);
993 void usbhid_quirks_exit(void);
994
995 #ifdef CONFIG_HID_PID
996 int hid_pidff_init(struct hid_device *hid);
997 #else
998 #define hid_pidff_init NULL
999 #endif
1000
1001 #define dbg_hid(format, arg...)                                         \
1002 do {                                                                    \
1003         if (hid_debug)                                                  \
1004                 printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);      \
1005 } while (0)
1006
1007 #define hid_printk(level, hid, fmt, arg...)             \
1008         dev_printk(level, &(hid)->dev, fmt, ##arg)
1009 #define hid_emerg(hid, fmt, arg...)                     \
1010         dev_emerg(&(hid)->dev, fmt, ##arg)
1011 #define hid_crit(hid, fmt, arg...)                      \
1012         dev_crit(&(hid)->dev, fmt, ##arg)
1013 #define hid_alert(hid, fmt, arg...)                     \
1014         dev_alert(&(hid)->dev, fmt, ##arg)
1015 #define hid_err(hid, fmt, arg...)                       \
1016         dev_err(&(hid)->dev, fmt, ##arg)
1017 #define hid_notice(hid, fmt, arg...)                    \
1018         dev_notice(&(hid)->dev, fmt, ##arg)
1019 #define hid_warn(hid, fmt, arg...)                      \
1020         dev_warn(&(hid)->dev, fmt, ##arg)
1021 #define hid_info(hid, fmt, arg...)                      \
1022         dev_info(&(hid)->dev, fmt, ##arg)
1023 #define hid_dbg(hid, fmt, arg...)                       \
1024         dev_dbg(&(hid)->dev, fmt, ##arg)
1025
1026 #endif