1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  Copyright (c) 1999 Andreas Gal
4  *  Copyright (c) 2000-2001 Vojtech Pavlik
5  *  Copyright (c) 2006-2007 Jiri Kosina
6  */
7 /*
8  *
9  * Should you need to contact me, the author, you can do so either by
10  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
11  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
12  */
13 #ifndef __HID_H
14 #define __HID_H
15 
16 
17 #include <linux/bitops.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/list.h>
21 #include <linux/mod_devicetable.h> /* hid_device_id */
22 #include <linux/timer.h>
23 #include <linux/workqueue.h>
24 #include <linux/input.h>
25 #include <linux/semaphore.h>
26 #include <linux/mutex.h>
27 #include <linux/power_supply.h>
28 #include <uapi/linux/hid.h>
29 #include <linux/hid_bpf.h>
30 
31 /*
32  * We parse each description item into this structure. Short items data
33  * values are expanded to 32-bit signed int, long items contain a pointer
34  * into the data area.
35  */
36 
37 struct hid_item {
38 	unsigned  format;
39 	__u8      size;
40 	__u8      type;
41 	__u8      tag;
42 	union {
43 	    __u8   u8;
44 	    __s8   s8;
45 	    __u16  u16;
46 	    __s16  s16;
47 	    __u32  u32;
48 	    __s32  s32;
49 	    __u8  *longdata;
50 	} data;
51 };
52 
53 /*
54  * HID report item format
55  */
56 
57 #define HID_ITEM_FORMAT_SHORT	0
58 #define HID_ITEM_FORMAT_LONG	1
59 
60 /*
61  * Special tag indicating long items
62  */
63 
64 #define HID_ITEM_TAG_LONG	15
65 
66 /*
67  * HID report descriptor item type (prefix bit 2,3)
68  */
69 
70 #define HID_ITEM_TYPE_MAIN		0
71 #define HID_ITEM_TYPE_GLOBAL		1
72 #define HID_ITEM_TYPE_LOCAL		2
73 #define HID_ITEM_TYPE_RESERVED		3
74 
75 /*
76  * HID report descriptor main item tags
77  */
78 
79 #define HID_MAIN_ITEM_TAG_INPUT			8
80 #define HID_MAIN_ITEM_TAG_OUTPUT		9
81 #define HID_MAIN_ITEM_TAG_FEATURE		11
82 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION	10
83 #define HID_MAIN_ITEM_TAG_END_COLLECTION	12
84 
85 /*
86  * HID report descriptor main item contents
87  */
88 
89 #define HID_MAIN_ITEM_CONSTANT		0x001
90 #define HID_MAIN_ITEM_VARIABLE		0x002
91 #define HID_MAIN_ITEM_RELATIVE		0x004
92 #define HID_MAIN_ITEM_WRAP		0x008
93 #define HID_MAIN_ITEM_NONLINEAR		0x010
94 #define HID_MAIN_ITEM_NO_PREFERRED	0x020
95 #define HID_MAIN_ITEM_NULL_STATE	0x040
96 #define HID_MAIN_ITEM_VOLATILE		0x080
97 #define HID_MAIN_ITEM_BUFFERED_BYTE	0x100
98 
99 /*
100  * HID report descriptor collection item types
101  */
102 
103 #define HID_COLLECTION_PHYSICAL		0
104 #define HID_COLLECTION_APPLICATION	1
105 #define HID_COLLECTION_LOGICAL		2
106 #define HID_COLLECTION_NAMED_ARRAY	4
107 
108 /*
109  * HID report descriptor global item tags
110  */
111 
112 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE		0
113 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM	1
114 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM	2
115 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM	3
116 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM	4
117 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT	5
118 #define HID_GLOBAL_ITEM_TAG_UNIT		6
119 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE		7
120 #define HID_GLOBAL_ITEM_TAG_REPORT_ID		8
121 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT	9
122 #define HID_GLOBAL_ITEM_TAG_PUSH		10
123 #define HID_GLOBAL_ITEM_TAG_POP			11
124 
125 /*
126  * HID report descriptor local item tags
127  */
128 
129 #define HID_LOCAL_ITEM_TAG_USAGE		0
130 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM	1
131 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM	2
132 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX	3
133 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM	4
134 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM	5
135 #define HID_LOCAL_ITEM_TAG_STRING_INDEX		7
136 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM	8
137 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM	9
138 #define HID_LOCAL_ITEM_TAG_DELIMITER		10
139 
140 /*
141  * HID usage tables
142  */
143 
144 #define HID_USAGE_PAGE		0xffff0000
145 
146 #define HID_UP_UNDEFINED	0x00000000
147 #define HID_UP_GENDESK		0x00010000
148 #define HID_UP_SIMULATION	0x00020000
149 #define HID_UP_GENDEVCTRLS	0x00060000
150 #define HID_UP_KEYBOARD		0x00070000
151 #define HID_UP_LED		0x00080000
152 #define HID_UP_BUTTON		0x00090000
153 #define HID_UP_ORDINAL		0x000a0000
154 #define HID_UP_TELEPHONY	0x000b0000
155 #define HID_UP_CONSUMER		0x000c0000
156 #define HID_UP_DIGITIZER	0x000d0000
157 #define HID_UP_PID		0x000f0000
158 #define HID_UP_BATTERY		0x00850000
159 #define HID_UP_CAMERA		0x00900000
160 #define HID_UP_HPVENDOR         0xff7f0000
161 #define HID_UP_HPVENDOR2        0xff010000
162 #define HID_UP_MSVENDOR		0xff000000
163 #define HID_UP_CUSTOM		0x00ff0000
164 #define HID_UP_LOGIVENDOR	0xffbc0000
165 #define HID_UP_LOGIVENDOR2   0xff090000
166 #define HID_UP_LOGIVENDOR3   0xff430000
167 #define HID_UP_LNVENDOR		0xffa00000
168 #define HID_UP_SENSOR		0x00200000
169 #define HID_UP_ASUSVENDOR	0xff310000
170 #define HID_UP_GOOGLEVENDOR	0xffd10000
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 /*
182  * Microsoft Win8 Wireless Radio Controls extensions CA, see:
183  * http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
184  */
185 #define HID_GD_WIRELESS_RADIO_CTLS	0x0001000c
186 /*
187  * System Multi-Axis, see:
188  * http://www.usb.org/developers/hidpage/HUTRR62_-_Generic_Desktop_CA_for_System_Multi-Axis_Controllers.txt
189  */
190 #define HID_GD_SYSTEM_MULTIAXIS	0x0001000e
191 
192 #define HID_GD_X		0x00010030
193 #define HID_GD_Y		0x00010031
194 #define HID_GD_Z		0x00010032
195 #define HID_GD_RX		0x00010033
196 #define HID_GD_RY		0x00010034
197 #define HID_GD_RZ		0x00010035
198 #define HID_GD_SLIDER		0x00010036
199 #define HID_GD_DIAL		0x00010037
200 #define HID_GD_WHEEL		0x00010038
201 #define HID_GD_HATSWITCH	0x00010039
202 #define HID_GD_BUFFER		0x0001003a
203 #define HID_GD_BYTECOUNT	0x0001003b
204 #define HID_GD_MOTION		0x0001003c
205 #define HID_GD_START		0x0001003d
206 #define HID_GD_SELECT		0x0001003e
207 #define HID_GD_VX		0x00010040
208 #define HID_GD_VY		0x00010041
209 #define HID_GD_VZ		0x00010042
210 #define HID_GD_VBRX		0x00010043
211 #define HID_GD_VBRY		0x00010044
212 #define HID_GD_VBRZ		0x00010045
213 #define HID_GD_VNO		0x00010046
214 #define HID_GD_FEATURE		0x00010047
215 #define HID_GD_RESOLUTION_MULTIPLIER	0x00010048
216 #define HID_GD_SYSTEM_CONTROL	0x00010080
217 #define HID_GD_UP		0x00010090
218 #define HID_GD_DOWN		0x00010091
219 #define HID_GD_RIGHT		0x00010092
220 #define HID_GD_LEFT		0x00010093
221 /* Microsoft Win8 Wireless Radio Controls CA usage codes */
222 #define HID_GD_RFKILL_BTN	0x000100c6
223 #define HID_GD_RFKILL_LED	0x000100c7
224 #define HID_GD_RFKILL_SWITCH	0x000100c8
225 
226 #define HID_DC_BATTERYSTRENGTH	0x00060020
227 
228 #define HID_CP_CONSUMER_CONTROL	0x000c0001
229 #define HID_CP_AC_PAN		0x000c0238
230 
231 #define HID_DG_DIGITIZER	0x000d0001
232 #define HID_DG_PEN		0x000d0002
233 #define HID_DG_LIGHTPEN		0x000d0003
234 #define HID_DG_TOUCHSCREEN	0x000d0004
235 #define HID_DG_TOUCHPAD		0x000d0005
236 #define HID_DG_WHITEBOARD	0x000d0006
237 #define HID_DG_STYLUS		0x000d0020
238 #define HID_DG_PUCK		0x000d0021
239 #define HID_DG_FINGER		0x000d0022
240 #define HID_DG_TIPPRESSURE	0x000d0030
241 #define HID_DG_BARRELPRESSURE	0x000d0031
242 #define HID_DG_INRANGE		0x000d0032
243 #define HID_DG_TOUCH		0x000d0033
244 #define HID_DG_UNTOUCH		0x000d0034
245 #define HID_DG_TAP		0x000d0035
246 #define HID_DG_TRANSDUCER_INDEX	0x000d0038
247 #define HID_DG_TABLETFUNCTIONKEY	0x000d0039
248 #define HID_DG_PROGRAMCHANGEKEY	0x000d003a
249 #define HID_DG_BATTERYSTRENGTH	0x000d003b
250 #define HID_DG_INVERT		0x000d003c
251 #define HID_DG_TILT_X		0x000d003d
252 #define HID_DG_TILT_Y		0x000d003e
253 #define HID_DG_TWIST		0x000d0041
254 #define HID_DG_TIPSWITCH	0x000d0042
255 #define HID_DG_TIPSWITCH2	0x000d0043
256 #define HID_DG_BARRELSWITCH	0x000d0044
257 #define HID_DG_ERASER		0x000d0045
258 #define HID_DG_TABLETPICK	0x000d0046
259 #define HID_DG_PEN_COLOR			0x000d005c
260 #define HID_DG_PEN_LINE_WIDTH			0x000d005e
261 #define HID_DG_PEN_LINE_STYLE			0x000d0070
262 #define HID_DG_PEN_LINE_STYLE_INK		0x000d0072
263 #define HID_DG_PEN_LINE_STYLE_PENCIL		0x000d0073
264 #define HID_DG_PEN_LINE_STYLE_HIGHLIGHTER	0x000d0074
265 #define HID_DG_PEN_LINE_STYLE_CHISEL_MARKER	0x000d0075
266 #define HID_DG_PEN_LINE_STYLE_BRUSH		0x000d0076
267 #define HID_DG_PEN_LINE_STYLE_NO_PREFERENCE	0x000d0077
268 
269 #define HID_CP_CONSUMERCONTROL	0x000c0001
270 #define HID_CP_NUMERICKEYPAD	0x000c0002
271 #define HID_CP_PROGRAMMABLEBUTTONS	0x000c0003
272 #define HID_CP_MICROPHONE	0x000c0004
273 #define HID_CP_HEADPHONE	0x000c0005
274 #define HID_CP_GRAPHICEQUALIZER	0x000c0006
275 #define HID_CP_FUNCTIONBUTTONS	0x000c0036
276 #define HID_CP_SELECTION	0x000c0080
277 #define HID_CP_MEDIASELECTION	0x000c0087
278 #define HID_CP_SELECTDISC	0x000c00ba
279 #define HID_CP_VOLUMEUP		0x000c00e9
280 #define HID_CP_VOLUMEDOWN	0x000c00ea
281 #define HID_CP_PLAYBACKSPEED	0x000c00f1
282 #define HID_CP_PROXIMITY	0x000c0109
283 #define HID_CP_SPEAKERSYSTEM	0x000c0160
284 #define HID_CP_CHANNELLEFT	0x000c0161
285 #define HID_CP_CHANNELRIGHT	0x000c0162
286 #define HID_CP_CHANNELCENTER	0x000c0163
287 #define HID_CP_CHANNELFRONT	0x000c0164
288 #define HID_CP_CHANNELCENTERFRONT	0x000c0165
289 #define HID_CP_CHANNELSIDE	0x000c0166
290 #define HID_CP_CHANNELSURROUND	0x000c0167
291 #define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT	0x000c0168
292 #define HID_CP_CHANNELTOP	0x000c0169
293 #define HID_CP_CHANNELUNKNOWN	0x000c016a
294 #define HID_CP_APPLICATIONLAUNCHBUTTONS	0x000c0180
295 #define HID_CP_GENERICGUIAPPLICATIONCONTROLS	0x000c0200
296 
297 #define HID_DG_DEVICECONFIG	0x000d000e
298 #define HID_DG_DEVICESETTINGS	0x000d0023
299 #define HID_DG_AZIMUTH		0x000d003f
300 #define HID_DG_CONFIDENCE	0x000d0047
301 #define HID_DG_WIDTH		0x000d0048
302 #define HID_DG_HEIGHT		0x000d0049
303 #define HID_DG_CONTACTID	0x000d0051
304 #define HID_DG_INPUTMODE	0x000d0052
305 #define HID_DG_DEVICEINDEX	0x000d0053
306 #define HID_DG_CONTACTCOUNT	0x000d0054
307 #define HID_DG_CONTACTMAX	0x000d0055
308 #define HID_DG_SCANTIME		0x000d0056
309 #define HID_DG_SURFACESWITCH	0x000d0057
310 #define HID_DG_BUTTONSWITCH	0x000d0058
311 #define HID_DG_BUTTONTYPE	0x000d0059
312 #define HID_DG_BARRELSWITCH2	0x000d005a
313 #define HID_DG_TOOLSERIALNUMBER	0x000d005b
314 #define HID_DG_LATENCYMODE	0x000d0060
315 
316 #define HID_BAT_ABSOLUTESTATEOFCHARGE	0x00850065
317 #define HID_BAT_CHARGING		0x00850044
318 
319 #define HID_VD_ASUS_CUSTOM_MEDIA_KEYS	0xff310076
320 
321 /*
322  * HID connect requests
323  */
324 
325 #define HID_CONNECT_HIDINPUT		BIT(0)
326 #define HID_CONNECT_HIDINPUT_FORCE	BIT(1)
327 #define HID_CONNECT_HIDRAW		BIT(2)
328 #define HID_CONNECT_HIDDEV		BIT(3)
329 #define HID_CONNECT_HIDDEV_FORCE	BIT(4)
330 #define HID_CONNECT_FF			BIT(5)
331 #define HID_CONNECT_DRIVER		BIT(6)
332 #define HID_CONNECT_DEFAULT	(HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
333 		HID_CONNECT_HIDDEV|HID_CONNECT_FF)
334 
335 /*
336  * HID device quirks.
337  */
338 
339 /*
340  * Increase this if you need to configure more HID quirks at module load time
341  */
342 #define MAX_USBHID_BOOT_QUIRKS 4
343 
344 /**
345  * DOC: HID quirks
346  * | @HID_QUIRK_NOTOUCH:
347  * | @HID_QUIRK_IGNORE: ignore this device
348  * | @HID_QUIRK_NOGET:
349  * | @HID_QUIRK_HIDDEV_FORCE:
350  * | @HID_QUIRK_BADPAD:
351  * | @HID_QUIRK_MULTI_INPUT:
352  * | @HID_QUIRK_HIDINPUT_FORCE:
353  * | @HID_QUIRK_ALWAYS_POLL:
354  * | @HID_QUIRK_INPUT_PER_APP:
355  * | @HID_QUIRK_X_INVERT:
356  * | @HID_QUIRK_Y_INVERT:
357  * | @HID_QUIRK_SKIP_OUTPUT_REPORTS:
358  * | @HID_QUIRK_SKIP_OUTPUT_REPORT_ID:
359  * | @HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP:
360  * | @HID_QUIRK_HAVE_SPECIAL_DRIVER:
361  * | @HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE:
362  * | @HID_QUIRK_FULLSPEED_INTERVAL:
363  * | @HID_QUIRK_NO_INIT_REPORTS:
364  * | @HID_QUIRK_NO_IGNORE:
365  * | @HID_QUIRK_NO_INPUT_SYNC:
366  */
367 /* BIT(0) reserved for backward compatibility, was HID_QUIRK_INVERT */
368 #define HID_QUIRK_NOTOUCH			BIT(1)
369 #define HID_QUIRK_IGNORE			BIT(2)
370 #define HID_QUIRK_NOGET				BIT(3)
371 #define HID_QUIRK_HIDDEV_FORCE			BIT(4)
372 #define HID_QUIRK_BADPAD			BIT(5)
373 #define HID_QUIRK_MULTI_INPUT			BIT(6)
374 #define HID_QUIRK_HIDINPUT_FORCE		BIT(7)
375 /* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
376 /* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
377 #define HID_QUIRK_ALWAYS_POLL			BIT(10)
378 #define HID_QUIRK_INPUT_PER_APP			BIT(11)
379 #define HID_QUIRK_X_INVERT			BIT(12)
380 #define HID_QUIRK_Y_INVERT			BIT(13)
381 #define HID_QUIRK_SKIP_OUTPUT_REPORTS		BIT(16)
382 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID		BIT(17)
383 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP	BIT(18)
384 #define HID_QUIRK_HAVE_SPECIAL_DRIVER		BIT(19)
385 #define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE	BIT(20)
386 #define HID_QUIRK_NOINVERT			BIT(21)
387 #define HID_QUIRK_FULLSPEED_INTERVAL		BIT(28)
388 #define HID_QUIRK_NO_INIT_REPORTS		BIT(29)
389 #define HID_QUIRK_NO_IGNORE			BIT(30)
390 #define HID_QUIRK_NO_INPUT_SYNC			BIT(31)
391 
392 /*
393  * HID device groups
394  *
395  * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
396  * and has a value of 0x0000
397  */
398 #define HID_GROUP_GENERIC			0x0001
399 #define HID_GROUP_MULTITOUCH			0x0002
400 #define HID_GROUP_SENSOR_HUB			0x0003
401 #define HID_GROUP_MULTITOUCH_WIN_8		0x0004
402 
403 /*
404  * Vendor specific HID device groups
405  */
406 #define HID_GROUP_RMI				0x0100
407 #define HID_GROUP_WACOM				0x0101
408 #define HID_GROUP_LOGITECH_DJ_DEVICE		0x0102
409 #define HID_GROUP_STEAM				0x0103
410 #define HID_GROUP_LOGITECH_27MHZ_DEVICE		0x0104
411 #define HID_GROUP_VIVALDI			0x0105
412 
413 /*
414  * HID protocol status
415  */
416 #define HID_REPORT_PROTOCOL	1
417 #define HID_BOOT_PROTOCOL	0
418 
419 /*
420  * This is the global environment of the parser. This information is
421  * persistent for main-items. The global environment can be saved and
422  * restored with PUSH/POP statements.
423  */
424 
425 struct hid_global {
426 	unsigned usage_page;
427 	__s32    logical_minimum;
428 	__s32    logical_maximum;
429 	__s32    physical_minimum;
430 	__s32    physical_maximum;
431 	__s32    unit_exponent;
432 	unsigned unit;
433 	unsigned report_id;
434 	unsigned report_size;
435 	unsigned report_count;
436 };
437 
438 /*
439  * This is the local environment. It is persistent up the next main-item.
440  */
441 
442 #define HID_MAX_USAGES			12288
443 #define HID_DEFAULT_NUM_COLLECTIONS	16
444 
445 struct hid_local {
446 	unsigned usage[HID_MAX_USAGES]; /* usage array */
447 	u8 usage_size[HID_MAX_USAGES]; /* usage size array */
448 	unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
449 	unsigned usage_index;
450 	unsigned usage_minimum;
451 	unsigned delimiter_depth;
452 	unsigned delimiter_branch;
453 };
454 
455 /*
456  * This is the collection stack. We climb up the stack to determine
457  * application and function of each field.
458  */
459 
460 struct hid_collection {
461 	int parent_idx; /* device->collection */
462 	unsigned type;
463 	unsigned usage;
464 	unsigned level;
465 };
466 
467 struct hid_usage {
468 	unsigned  hid;			/* hid usage code */
469 	unsigned  collection_index;	/* index into collection array */
470 	unsigned  usage_index;		/* index into usage array */
471 	__s8	  resolution_multiplier;/* Effective Resolution Multiplier
472 					   (HUT v1.12, 4.3.1), default: 1 */
473 	/* hidinput data */
474 	__s8	  wheel_factor;		/* 120/resolution_multiplier */
475 	__u16     code;			/* input driver code */
476 	__u8      type;			/* input driver type */
477 	__s8	  hat_min;		/* hat switch fun */
478 	__s8	  hat_max;		/* ditto */
479 	__s8	  hat_dir;		/* ditto */
480 	__s16	  wheel_accumulated;	/* hi-res wheel */
481 };
482 
483 struct hid_input;
484 
485 struct hid_field {
486 	unsigned  physical;		/* physical usage for this field */
487 	unsigned  logical;		/* logical usage for this field */
488 	unsigned  application;		/* application usage for this field */
489 	struct hid_usage *usage;	/* usage table for this function */
490 	unsigned  maxusage;		/* maximum usage index */
491 	unsigned  flags;		/* main-item flags (i.e. volatile,array,constant) */
492 	unsigned  report_offset;	/* bit offset in the report */
493 	unsigned  report_size;		/* size of this field in the report */
494 	unsigned  report_count;		/* number of this field in the report */
495 	unsigned  report_type;		/* (input,output,feature) */
496 	__s32    *value;		/* last known value(s) */
497 	__s32    *new_value;		/* newly read value(s) */
498 	__s32    *usages_priorities;	/* priority of each usage when reading the report
499 					 * bits 8-16 are reserved for hid-input usage
500 					 */
501 	__s32     logical_minimum;
502 	__s32     logical_maximum;
503 	__s32     physical_minimum;
504 	__s32     physical_maximum;
505 	__s32     unit_exponent;
506 	unsigned  unit;
507 	bool      ignored;		/* this field is ignored in this event */
508 	struct hid_report *report;	/* associated report */
509 	unsigned index;			/* index into report->field[] */
510 	/* hidinput data */
511 	struct hid_input *hidinput;	/* associated input structure */
512 	__u16 dpad;			/* dpad input code */
513 	unsigned int slot_idx;		/* slot index in a report */
514 };
515 
516 #define HID_MAX_FIELDS 256
517 
518 struct hid_field_entry {
519 	struct list_head list;
520 	struct hid_field *field;
521 	unsigned int index;
522 	__s32 priority;
523 };
524 
525 struct hid_report {
526 	struct list_head list;
527 	struct list_head hidinput_list;
528 	struct list_head field_entry_list;		/* ordered list of input fields */
529 	unsigned int id;				/* id of this report */
530 	enum hid_report_type type;			/* report type */
531 	unsigned int application;			/* application usage for this report */
532 	struct hid_field *field[HID_MAX_FIELDS];	/* fields of the report */
533 	struct hid_field_entry *field_entries;		/* allocated memory of input field_entry */
534 	unsigned maxfield;				/* maximum valid field index */
535 	unsigned size;					/* size of the report (bits) */
536 	struct hid_device *device;			/* associated device */
537 
538 	/* tool related state */
539 	bool tool_active;				/* whether the current tool is active */
540 	unsigned int tool;				/* BTN_TOOL_* */
541 };
542 
543 #define HID_MAX_IDS 256
544 
545 struct hid_report_enum {
546 	unsigned numbered;
547 	struct list_head report_list;
548 	struct hid_report *report_id_hash[HID_MAX_IDS];
549 };
550 
551 #define HID_MIN_BUFFER_SIZE	64		/* make sure there is at least a packet size of space */
552 #define HID_MAX_BUFFER_SIZE	16384		/* 16kb */
553 #define HID_CONTROL_FIFO_SIZE	256		/* to init devices with >100 reports */
554 #define HID_OUTPUT_FIFO_SIZE	64
555 
556 struct hid_control_fifo {
557 	unsigned char dir;
558 	struct hid_report *report;
559 	char *raw_report;
560 };
561 
562 struct hid_output_fifo {
563 	struct hid_report *report;
564 	char *raw_report;
565 };
566 
567 #define HID_CLAIMED_INPUT	BIT(0)
568 #define HID_CLAIMED_HIDDEV	BIT(1)
569 #define HID_CLAIMED_HIDRAW	BIT(2)
570 #define HID_CLAIMED_DRIVER	BIT(3)
571 
572 #define HID_STAT_ADDED		BIT(0)
573 #define HID_STAT_PARSED		BIT(1)
574 #define HID_STAT_DUP_DETECTED	BIT(2)
575 #define HID_STAT_REPROBED	BIT(3)
576 
577 struct hid_input {
578 	struct list_head list;
579 	struct hid_report *report;
580 	struct input_dev *input;
581 	const char *name;
582 	struct list_head reports;	/* the list of reports */
583 	unsigned int application;	/* application usage for this input */
584 	bool registered;
585 };
586 
587 enum hid_type {
588 	HID_TYPE_OTHER = 0,
589 	HID_TYPE_USBMOUSE,
590 	HID_TYPE_USBNONE
591 };
592 
593 enum hid_battery_status {
594 	HID_BATTERY_UNKNOWN = 0,
595 	HID_BATTERY_QUERIED,		/* Kernel explicitly queried battery strength */
596 	HID_BATTERY_REPORTED,		/* Device sent unsolicited battery strength report */
597 };
598 
599 struct hid_driver;
600 struct hid_ll_driver;
601 
602 struct hid_device {							/* device report descriptor */
603 	__u8 *dev_rdesc;
604 	unsigned dev_rsize;
605 	__u8 *rdesc;
606 	unsigned rsize;
607 	struct hid_collection *collection;				/* List of HID collections */
608 	unsigned collection_size;					/* Number of allocated hid_collections */
609 	unsigned maxcollection;						/* Number of parsed collections */
610 	unsigned maxapplication;					/* Number of applications */
611 	__u16 bus;							/* BUS ID */
612 	__u16 group;							/* Report group */
613 	__u32 vendor;							/* Vendor ID */
614 	__u32 product;							/* Product ID */
615 	__u32 version;							/* HID version */
616 	enum hid_type type;						/* device type (mouse, kbd, ...) */
617 	unsigned country;						/* HID country */
618 	struct hid_report_enum report_enum[HID_REPORT_TYPES];
619 	struct work_struct led_work;					/* delayed LED worker */
620 
621 	struct semaphore driver_input_lock;				/* protects the current driver */
622 	struct device dev;						/* device */
623 	struct hid_driver *driver;
624 	void *devres_group_id;						/* ID of probe devres group	*/
625 
626 	const struct hid_ll_driver *ll_driver;
627 	struct mutex ll_open_lock;
628 	unsigned int ll_open_count;
629 
630 #ifdef CONFIG_HID_BATTERY_STRENGTH
631 	/*
632 	 * Power supply information for HID devices which report
633 	 * battery strength. power_supply was successfully registered if
634 	 * battery is non-NULL.
635 	 */
636 	struct power_supply *battery;
637 	__s32 battery_capacity;
638 	__s32 battery_min;
639 	__s32 battery_max;
640 	__s32 battery_report_type;
641 	__s32 battery_report_id;
642 	__s32 battery_charge_status;
643 	enum hid_battery_status battery_status;
644 	bool battery_avoid_query;
645 	ktime_t battery_ratelimit_time;
646 #endif
647 
648 	unsigned long status;						/* see STAT flags above */
649 	unsigned claimed;						/* Claimed by hidinput, hiddev? */
650 	unsigned quirks;						/* Various quirks the device can pull on us */
651 	unsigned initial_quirks;					/* Initial set of quirks supplied when creating device */
652 	bool io_started;						/* If IO has started */
653 
654 	struct list_head inputs;					/* The list of inputs */
655 	void *hiddev;							/* The hiddev structure */
656 	void *hidraw;
657 
658 	char name[128];							/* Device name */
659 	char phys[64];							/* Device physical location */
660 	char uniq[64];							/* Device unique identifier (serial #) */
661 
662 	void *driver_data;
663 
664 	/* temporary hid_ff handling (until moved to the drivers) */
665 	int (*ff_init)(struct hid_device *);
666 
667 	/* hiddev event handler */
668 	int (*hiddev_connect)(struct hid_device *, unsigned int);
669 	void (*hiddev_disconnect)(struct hid_device *);
670 	void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
671 				  struct hid_usage *, __s32);
672 	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
673 
674 	/* debugging support via debugfs */
675 	unsigned short debug;
676 	struct dentry *debug_dir;
677 	struct dentry *debug_rdesc;
678 	struct dentry *debug_events;
679 	struct list_head debug_list;
680 	spinlock_t  debug_list_lock;
681 	wait_queue_head_t debug_wait;
682 	struct kref			ref;
683 
684 	unsigned int id;						/* system unique id */
685 
686 #ifdef CONFIG_BPF
687 	struct hid_bpf bpf;						/* hid-bpf data */
688 #endif /* CONFIG_BPF */
689 };
690 
691 void hiddev_free(struct kref *ref);
692 
693 #define to_hid_device(pdev) \
694 	container_of(pdev, struct hid_device, dev)
695 
hid_get_drvdata(struct hid_device * hdev)696 static inline void *hid_get_drvdata(struct hid_device *hdev)
697 {
698 	return dev_get_drvdata(&hdev->dev);
699 }
700 
hid_set_drvdata(struct hid_device * hdev,void * data)701 static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
702 {
703 	dev_set_drvdata(&hdev->dev, data);
704 }
705 
706 #define HID_GLOBAL_STACK_SIZE 4
707 #define HID_COLLECTION_STACK_SIZE 4
708 
709 #define HID_SCAN_FLAG_MT_WIN_8			BIT(0)
710 #define HID_SCAN_FLAG_VENDOR_SPECIFIC		BIT(1)
711 #define HID_SCAN_FLAG_GD_POINTER		BIT(2)
712 
713 struct hid_parser {
714 	struct hid_global     global;
715 	struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
716 	unsigned int          global_stack_ptr;
717 	struct hid_local      local;
718 	unsigned int         *collection_stack;
719 	unsigned int          collection_stack_ptr;
720 	unsigned int          collection_stack_size;
721 	struct hid_device    *device;
722 	unsigned int          scan_flags;
723 };
724 
725 struct hid_class_descriptor {
726 	__u8  bDescriptorType;
727 	__le16 wDescriptorLength;
728 } __attribute__ ((packed));
729 
730 struct hid_descriptor {
731 	__u8  bLength;
732 	__u8  bDescriptorType;
733 	__le16 bcdHID;
734 	__u8  bCountryCode;
735 	__u8  bNumDescriptors;
736 
737 	struct hid_class_descriptor desc[1];
738 } __attribute__ ((packed));
739 
740 #define HID_DEVICE(b, g, ven, prod)					\
741 	.bus = (b), .group = (g), .vendor = (ven), .product = (prod)
742 #define HID_USB_DEVICE(ven, prod)				\
743 	.bus = BUS_USB, .vendor = (ven), .product = (prod)
744 #define HID_BLUETOOTH_DEVICE(ven, prod)					\
745 	.bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
746 #define HID_I2C_DEVICE(ven, prod)				\
747 	.bus = BUS_I2C, .vendor = (ven), .product = (prod)
748 
749 #define HID_REPORT_ID(rep) \
750 	.report_type = (rep)
751 #define HID_USAGE_ID(uhid, utype, ucode) \
752 	.usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
753 /* we don't want to catch types and codes equal to 0 */
754 #define HID_TERMINATOR		(HID_ANY_ID - 1)
755 
756 struct hid_report_id {
757 	__u32 report_type;
758 };
759 struct hid_usage_id {
760 	__u32 usage_hid;
761 	__u32 usage_type;
762 	__u32 usage_code;
763 };
764 
765 /**
766  * struct hid_driver
767  * @name: driver name (e.g. "Footech_bar-wheel")
768  * @id_table: which devices is this driver for (must be non-NULL for probe
769  * 	      to be called)
770  * @dyn_list: list of dynamically added device ids
771  * @dyn_lock: lock protecting @dyn_list
772  * @match: check if the given device is handled by this driver
773  * @probe: new device inserted
774  * @remove: device removed (NULL if not a hot-plug capable driver)
775  * @report_table: on which reports to call raw_event (NULL means all)
776  * @raw_event: if report in report_table, this hook is called (NULL means nop)
777  * @usage_table: on which events to call event (NULL means all)
778  * @event: if usage in usage_table, this hook is called (NULL means nop)
779  * @report: this hook is called after parsing a report (NULL means nop)
780  * @report_fixup: called before report descriptor parsing (NULL means nop)
781  * @input_mapping: invoked on input registering before mapping an usage
782  * @input_mapped: invoked on input registering after mapping an usage
783  * @input_configured: invoked just before the device is registered
784  * @feature_mapping: invoked on feature registering
785  * @suspend: invoked on suspend (NULL means nop)
786  * @resume: invoked on resume if device was not reset (NULL means nop)
787  * @reset_resume: invoked on resume if device was reset (NULL means nop)
788  *
789  * probe should return -errno on error, or 0 on success. During probe,
790  * input will not be passed to raw_event unless hid_device_io_start is
791  * called.
792  *
793  * raw_event and event should return negative on error, any other value will
794  * pass the event on to .event() typically return 0 for success.
795  *
796  * input_mapping shall return a negative value to completely ignore this usage
797  * (e.g. doubled or invalid usage), zero to continue with parsing of this
798  * usage by generic code (no special handling needed) or positive to skip
799  * generic parsing (needed special handling which was done in the hook already)
800  * input_mapped shall return negative to inform the layer that this usage
801  * should not be considered for further processing or zero to notify that
802  * no processing was performed and should be done in a generic manner
803  * Both these functions may be NULL which means the same behavior as returning
804  * zero from them.
805  */
806 struct hid_driver {
807 	char *name;
808 	const struct hid_device_id *id_table;
809 
810 	struct list_head dyn_list;
811 	spinlock_t dyn_lock;
812 
813 	bool (*match)(struct hid_device *dev, bool ignore_special_driver);
814 	int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
815 	void (*remove)(struct hid_device *dev);
816 
817 	const struct hid_report_id *report_table;
818 	int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
819 			u8 *data, int size);
820 	const struct hid_usage_id *usage_table;
821 	int (*event)(struct hid_device *hdev, struct hid_field *field,
822 			struct hid_usage *usage, __s32 value);
823 	void (*report)(struct hid_device *hdev, struct hid_report *report);
824 
825 	__u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
826 			unsigned int *size);
827 
828 	int (*input_mapping)(struct hid_device *hdev,
829 			struct hid_input *hidinput, struct hid_field *field,
830 			struct hid_usage *usage, unsigned long **bit, int *max);
831 	int (*input_mapped)(struct hid_device *hdev,
832 			struct hid_input *hidinput, struct hid_field *field,
833 			struct hid_usage *usage, unsigned long **bit, int *max);
834 	int (*input_configured)(struct hid_device *hdev,
835 				struct hid_input *hidinput);
836 	void (*feature_mapping)(struct hid_device *hdev,
837 			struct hid_field *field,
838 			struct hid_usage *usage);
839 #ifdef CONFIG_PM
840 	int (*suspend)(struct hid_device *hdev, pm_message_t message);
841 	int (*resume)(struct hid_device *hdev);
842 	int (*reset_resume)(struct hid_device *hdev);
843 #endif
844 /* private: */
845 	struct device_driver driver;
846 };
847 
848 #define to_hid_driver(pdrv) \
849 	container_of(pdrv, struct hid_driver, driver)
850 
851 /**
852  * struct hid_ll_driver - low level driver callbacks
853  * @start: called on probe to start the device
854  * @stop: called on remove
855  * @open: called by input layer on open
856  * @close: called by input layer on close
857  * @power: request underlying hardware to enter requested power mode
858  * @parse: this method is called only once to parse the device data,
859  *	   shouldn't allocate anything to not leak memory
860  * @request: send report request to device (e.g. feature report)
861  * @wait: wait for buffered io to complete (send/recv reports)
862  * @raw_request: send raw report request to device (e.g. feature report)
863  * @output_report: send output report to device
864  * @idle: send idle request to device
865  * @may_wakeup: return if device may act as a wakeup source during system-suspend
866  * @max_buffer_size: over-ride maximum data buffer size (default: HID_MAX_BUFFER_SIZE)
867  */
868 struct hid_ll_driver {
869 	int (*start)(struct hid_device *hdev);
870 	void (*stop)(struct hid_device *hdev);
871 
872 	int (*open)(struct hid_device *hdev);
873 	void (*close)(struct hid_device *hdev);
874 
875 	int (*power)(struct hid_device *hdev, int level);
876 
877 	int (*parse)(struct hid_device *hdev);
878 
879 	void (*request)(struct hid_device *hdev,
880 			struct hid_report *report, int reqtype);
881 
882 	int (*wait)(struct hid_device *hdev);
883 
884 	int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
885 			    __u8 *buf, size_t len, unsigned char rtype,
886 			    int reqtype);
887 
888 	int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
889 
890 	int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
891 	bool (*may_wakeup)(struct hid_device *hdev);
892 
893 	unsigned int max_buffer_size;
894 };
895 
896 extern bool hid_is_usb(const struct hid_device *hdev);
897 
898 #define	PM_HINT_FULLON	1<<5
899 #define PM_HINT_NORMAL	1<<1
900 
901 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
902 /* We ignore a few input applications that are not widely used */
903 #define IS_INPUT_APPLICATION(a) \
904 		(((a >= HID_UP_GENDESK) && (a <= HID_GD_MULTIAXIS)) \
905 		|| ((a >= HID_DG_DIGITIZER) && (a <= HID_DG_WHITEBOARD)) \
906 		|| (a == HID_GD_SYSTEM_CONTROL) || (a == HID_CP_CONSUMER_CONTROL) \
907 		|| (a == HID_GD_WIRELESS_RADIO_CTLS))
908 
909 /* HID core API */
910 
911 extern bool hid_ignore(struct hid_device *);
912 extern int hid_add_device(struct hid_device *);
913 extern void hid_destroy_device(struct hid_device *);
914 
915 extern struct bus_type hid_bus_type;
916 
917 extern int __must_check __hid_register_driver(struct hid_driver *,
918 		struct module *, const char *mod_name);
919 
920 /* use a define to avoid include chaining to get THIS_MODULE & friends */
921 #define hid_register_driver(driver) \
922 	__hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
923 
924 extern void hid_unregister_driver(struct hid_driver *);
925 
926 /**
927  * module_hid_driver() - Helper macro for registering a HID driver
928  * @__hid_driver: hid_driver struct
929  *
930  * Helper macro for HID drivers which do not do anything special in module
931  * init/exit. This eliminates a lot of boilerplate. Each module may only
932  * use this macro once, and calling it replaces module_init() and module_exit()
933  */
934 #define module_hid_driver(__hid_driver) \
935 	module_driver(__hid_driver, hid_register_driver, \
936 		      hid_unregister_driver)
937 
938 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
939 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
940 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
941 extern void hidinput_disconnect(struct hid_device *);
942 
943 int hid_set_field(struct hid_field *, unsigned, __s32);
944 int hid_input_report(struct hid_device *hid, enum hid_report_type type, u8 *data, u32 size,
945 		     int interrupt);
946 struct hid_field *hidinput_get_led_field(struct hid_device *hid);
947 unsigned int hidinput_count_leds(struct hid_device *hid);
948 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
949 void hid_output_report(struct hid_report *report, __u8 *data);
950 int __hid_request(struct hid_device *hid, struct hid_report *rep, enum hid_class_request reqtype);
951 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
952 struct hid_device *hid_allocate_device(void);
953 struct hid_report *hid_register_report(struct hid_device *device,
954 				       enum hid_report_type type, unsigned int id,
955 				       unsigned int application);
956 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
957 struct hid_report *hid_validate_values(struct hid_device *hid,
958 				       enum hid_report_type type, unsigned int id,
959 				       unsigned int field_index,
960 				       unsigned int report_counts);
961 
962 void hid_setup_resolution_multiplier(struct hid_device *hid);
963 int hid_open_report(struct hid_device *device);
964 int hid_check_keys_pressed(struct hid_device *hid);
965 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
966 void hid_disconnect(struct hid_device *hid);
967 bool hid_match_one_id(const struct hid_device *hdev,
968 		      const struct hid_device_id *id);
969 const struct hid_device_id *hid_match_id(const struct hid_device *hdev,
970 					 const struct hid_device_id *id);
971 const struct hid_device_id *hid_match_device(struct hid_device *hdev,
972 					     struct hid_driver *hdrv);
973 bool hid_compare_device_paths(struct hid_device *hdev_a,
974 			      struct hid_device *hdev_b, char separator);
975 s32 hid_snto32(__u32 value, unsigned n);
976 __u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
977 		     unsigned offset, unsigned n);
978 
979 #ifdef CONFIG_PM
980 int hid_driver_suspend(struct hid_device *hdev, pm_message_t state);
981 int hid_driver_reset_resume(struct hid_device *hdev);
982 int hid_driver_resume(struct hid_device *hdev);
983 #else
hid_driver_suspend(struct hid_device * hdev,pm_message_t state)984 static inline int hid_driver_suspend(struct hid_device *hdev, pm_message_t state) { return 0; }
hid_driver_reset_resume(struct hid_device * hdev)985 static inline int hid_driver_reset_resume(struct hid_device *hdev) { return 0; }
hid_driver_resume(struct hid_device * hdev)986 static inline int hid_driver_resume(struct hid_device *hdev) { return 0; }
987 #endif
988 
989 /**
990  * hid_device_io_start - enable HID input during probe, remove
991  *
992  * @hid: the device
993  *
994  * This should only be called during probe or remove and only be
995  * called by the thread calling probe or remove. It will allow
996  * incoming packets to be delivered to the driver.
997  */
hid_device_io_start(struct hid_device * hid)998 static inline void hid_device_io_start(struct hid_device *hid) {
999 	if (hid->io_started) {
1000 		dev_warn(&hid->dev, "io already started\n");
1001 		return;
1002 	}
1003 	hid->io_started = true;
1004 	up(&hid->driver_input_lock);
1005 }
1006 
1007 /**
1008  * hid_device_io_stop - disable HID input during probe, remove
1009  *
1010  * @hid: the device
1011  *
1012  * Should only be called after hid_device_io_start. It will prevent
1013  * incoming packets from going to the driver for the duration of
1014  * probe, remove. If called during probe, packets will still go to the
1015  * driver after probe is complete. This function should only be called
1016  * by the thread calling probe or remove.
1017  */
hid_device_io_stop(struct hid_device * hid)1018 static inline void hid_device_io_stop(struct hid_device *hid) {
1019 	if (!hid->io_started) {
1020 		dev_warn(&hid->dev, "io already stopped\n");
1021 		return;
1022 	}
1023 	hid->io_started = false;
1024 	down(&hid->driver_input_lock);
1025 }
1026 
1027 /**
1028  * hid_map_usage - map usage input bits
1029  *
1030  * @hidinput: hidinput which we are interested in
1031  * @usage: usage to fill in
1032  * @bit: pointer to input->{}bit (out parameter)
1033  * @max: maximal valid usage->code to consider later (out parameter)
1034  * @type: input event type (EV_KEY, EV_REL, ...)
1035  * @c: code which corresponds to this usage and type
1036  *
1037  * The value pointed to by @bit will be set to NULL if either @type is
1038  * an unhandled event type, or if @c is out of range for @type. This
1039  * can be used as an error condition.
1040  */
hid_map_usage(struct hid_input * hidinput,struct hid_usage * usage,unsigned long ** bit,int * max,__u8 type,unsigned int c)1041 static inline void hid_map_usage(struct hid_input *hidinput,
1042 		struct hid_usage *usage, unsigned long **bit, int *max,
1043 		__u8 type, unsigned int c)
1044 {
1045 	struct input_dev *input = hidinput->input;
1046 	unsigned long *bmap = NULL;
1047 	unsigned int limit = 0;
1048 
1049 	switch (type) {
1050 	case EV_ABS:
1051 		bmap = input->absbit;
1052 		limit = ABS_MAX;
1053 		break;
1054 	case EV_REL:
1055 		bmap = input->relbit;
1056 		limit = REL_MAX;
1057 		break;
1058 	case EV_KEY:
1059 		bmap = input->keybit;
1060 		limit = KEY_MAX;
1061 		break;
1062 	case EV_LED:
1063 		bmap = input->ledbit;
1064 		limit = LED_MAX;
1065 		break;
1066 	case EV_MSC:
1067 		bmap = input->mscbit;
1068 		limit = MSC_MAX;
1069 		break;
1070 	}
1071 
1072 	if (unlikely(c > limit || !bmap)) {
1073 		pr_warn_ratelimited("%s: Invalid code %d type %d\n",
1074 				    input->name, c, type);
1075 		*bit = NULL;
1076 		return;
1077 	}
1078 
1079 	usage->type = type;
1080 	usage->code = c;
1081 	*max = limit;
1082 	*bit = bmap;
1083 }
1084 
1085 /**
1086  * hid_map_usage_clear - map usage input bits and clear the input bit
1087  *
1088  * @hidinput: hidinput which we are interested in
1089  * @usage: usage to fill in
1090  * @bit: pointer to input->{}bit (out parameter)
1091  * @max: maximal valid usage->code to consider later (out parameter)
1092  * @type: input event type (EV_KEY, EV_REL, ...)
1093  * @c: code which corresponds to this usage and type
1094  *
1095  * The same as hid_map_usage, except the @c bit is also cleared in supported
1096  * bits (@bit).
1097  */
hid_map_usage_clear(struct hid_input * hidinput,struct hid_usage * usage,unsigned long ** bit,int * max,__u8 type,__u16 c)1098 static inline void hid_map_usage_clear(struct hid_input *hidinput,
1099 		struct hid_usage *usage, unsigned long **bit, int *max,
1100 		__u8 type, __u16 c)
1101 {
1102 	hid_map_usage(hidinput, usage, bit, max, type, c);
1103 	if (*bit)
1104 		clear_bit(usage->code, *bit);
1105 }
1106 
1107 /**
1108  * hid_parse - parse HW reports
1109  *
1110  * @hdev: hid device
1111  *
1112  * Call this from probe after you set up the device (if needed). Your
1113  * report_fixup will be called (if non-NULL) after reading raw report from
1114  * device before passing it to hid layer for real parsing.
1115  */
hid_parse(struct hid_device * hdev)1116 static inline int __must_check hid_parse(struct hid_device *hdev)
1117 {
1118 	return hid_open_report(hdev);
1119 }
1120 
1121 int __must_check hid_hw_start(struct hid_device *hdev,
1122 			      unsigned int connect_mask);
1123 void hid_hw_stop(struct hid_device *hdev);
1124 int __must_check hid_hw_open(struct hid_device *hdev);
1125 void hid_hw_close(struct hid_device *hdev);
1126 void hid_hw_request(struct hid_device *hdev,
1127 		    struct hid_report *report, enum hid_class_request reqtype);
1128 int hid_hw_raw_request(struct hid_device *hdev,
1129 		       unsigned char reportnum, __u8 *buf,
1130 		       size_t len, enum hid_report_type rtype,
1131 		       enum hid_class_request reqtype);
1132 int hid_hw_output_report(struct hid_device *hdev, __u8 *buf, size_t len);
1133 
1134 /**
1135  * hid_hw_power - requests underlying HW to go into given power mode
1136  *
1137  * @hdev: hid device
1138  * @level: requested power level (one of %PM_HINT_* defines)
1139  *
1140  * This function requests underlying hardware to enter requested power
1141  * mode.
1142  */
1143 
hid_hw_power(struct hid_device * hdev,int level)1144 static inline int hid_hw_power(struct hid_device *hdev, int level)
1145 {
1146 	return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
1147 }
1148 
1149 
1150 /**
1151  * hid_hw_idle - send idle request to device
1152  *
1153  * @hdev: hid device
1154  * @report: report to control
1155  * @idle: idle state
1156  * @reqtype: hid request type
1157  */
hid_hw_idle(struct hid_device * hdev,int report,int idle,enum hid_class_request reqtype)1158 static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
1159 		enum hid_class_request reqtype)
1160 {
1161 	if (hdev->ll_driver->idle)
1162 		return hdev->ll_driver->idle(hdev, report, idle, reqtype);
1163 
1164 	return 0;
1165 }
1166 
1167 /**
1168  * hid_hw_may_wakeup - return if the hid device may act as a wakeup source during system-suspend
1169  *
1170  * @hdev: hid device
1171  */
hid_hw_may_wakeup(struct hid_device * hdev)1172 static inline bool hid_hw_may_wakeup(struct hid_device *hdev)
1173 {
1174 	if (hdev->ll_driver->may_wakeup)
1175 		return hdev->ll_driver->may_wakeup(hdev);
1176 
1177 	if (hdev->dev.parent)
1178 		return device_may_wakeup(hdev->dev.parent);
1179 
1180 	return false;
1181 }
1182 
1183 /**
1184  * hid_hw_wait - wait for buffered io to complete
1185  *
1186  * @hdev: hid device
1187  */
hid_hw_wait(struct hid_device * hdev)1188 static inline void hid_hw_wait(struct hid_device *hdev)
1189 {
1190 	if (hdev->ll_driver->wait)
1191 		hdev->ll_driver->wait(hdev);
1192 }
1193 
1194 /**
1195  * hid_report_len - calculate the report length
1196  *
1197  * @report: the report we want to know the length
1198  */
hid_report_len(struct hid_report * report)1199 static inline u32 hid_report_len(struct hid_report *report)
1200 {
1201 	return DIV_ROUND_UP(report->size, 8) + (report->id > 0);
1202 }
1203 
1204 int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 *data, u32 size,
1205 			 int interrupt);
1206 
1207 /* HID quirks API */
1208 unsigned long hid_lookup_quirk(const struct hid_device *hdev);
1209 int hid_quirks_init(char **quirks_param, __u16 bus, int count);
1210 void hid_quirks_exit(__u16 bus);
1211 
1212 #ifdef CONFIG_HID_PID
1213 int hid_pidff_init(struct hid_device *hid);
1214 #else
1215 #define hid_pidff_init NULL
1216 #endif
1217 
1218 #define dbg_hid(fmt, ...) pr_debug("%s: " fmt, __FILE__, ##__VA_ARGS__)
1219 
1220 #define hid_err(hid, fmt, ...)				\
1221 	dev_err(&(hid)->dev, fmt, ##__VA_ARGS__)
1222 #define hid_notice(hid, fmt, ...)			\
1223 	dev_notice(&(hid)->dev, fmt, ##__VA_ARGS__)
1224 #define hid_warn(hid, fmt, ...)				\
1225 	dev_warn(&(hid)->dev, fmt, ##__VA_ARGS__)
1226 #define hid_info(hid, fmt, ...)				\
1227 	dev_info(&(hid)->dev, fmt, ##__VA_ARGS__)
1228 #define hid_dbg(hid, fmt, ...)				\
1229 	dev_dbg(&(hid)->dev, fmt, ##__VA_ARGS__)
1230 
1231 #define hid_err_once(hid, fmt, ...)			\
1232 	dev_err_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1233 #define hid_notice_once(hid, fmt, ...)			\
1234 	dev_notice_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1235 #define hid_warn_once(hid, fmt, ...)			\
1236 	dev_warn_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1237 #define hid_info_once(hid, fmt, ...)			\
1238 	dev_info_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1239 #define hid_dbg_once(hid, fmt, ...)			\
1240 	dev_dbg_once(&(hid)->dev, fmt, ##__VA_ARGS__)
1241 
1242 #endif
1243