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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Copyright (c) 2006-2010 Jiri Kosina
5 *
6 * HID to Linux Input mapping
7 */
8
9/*
10 *
11 * Should you need to contact me, the author, you can do so either by
12 * e-mail - mail your message to <[email protected]>, or by paper mail:
13 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
14 */
15
16#include <linux/module.h>
17#include <linux/slab.h>
18#include <linux/kernel.h>
19
20#include <linux/hid.h>
21#include <linux/hid-debug.h>
22
23#include "hid-ids.h"
24
25#define unk KEY_UNKNOWN
26
27static const unsigned char hid_keyboard[256] = {
28 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
29 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
30 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
31 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
32 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
33 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
34 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
35 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
36 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
37 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
38 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
39 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
40 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
41 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
42 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
43 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
44};
45
46static const struct {
47 __s32 x;
48 __s32 y;
49} hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
50
51struct usage_priority {
52 __u32 usage; /* the HID usage associated */
53 bool global; /* we assume all usages to be slotted,
54 * unless global
55 */
56 unsigned int slot_overwrite; /* for globals: allows to set the usage
57 * before or after the slots
58 */
59};
60
61/*
62 * hid-input will convert this list into priorities:
63 * the first element will have the highest priority
64 * (the length of the following array) and the last
65 * element the lowest (1).
66 *
67 * hid-input will then shift the priority by 8 bits to leave some space
68 * in case drivers want to interleave other fields.
69 *
70 * To accommodate slotted devices, the slot priority is
71 * defined in the next 8 bits (defined by 0xff - slot).
72 *
73 * If drivers want to add fields before those, hid-input will
74 * leave out the first 8 bits of the priority value.
75 *
76 * This still leaves us 65535 individual priority values.
77 */
78static const struct usage_priority hidinput_usages_priorities[] = {
79 { /* Eraser (eraser touching) must always come before tipswitch */
80 .usage = HID_DG_ERASER,
81 },
82 { /* Invert must always come before In Range */
83 .usage = HID_DG_INVERT,
84 },
85 { /* Is the tip of the tool touching? */
86 .usage = HID_DG_TIPSWITCH,
87 },
88 { /* Tip Pressure might emulate tip switch */
89 .usage = HID_DG_TIPPRESSURE,
90 },
91 { /* In Range needs to come after the other tool states */
92 .usage = HID_DG_INRANGE,
93 },
94};
95
96#define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
97#define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
98#define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
99#define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
100#define map_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c))
101
102#define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
103 &max, EV_ABS, (c))
104#define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
105 &max, EV_KEY, (c))
106
107static bool match_scancode(struct hid_usage *usage,
108 unsigned int cur_idx, unsigned int scancode)
109{
110 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
111}
112
113static bool match_keycode(struct hid_usage *usage,
114 unsigned int cur_idx, unsigned int keycode)
115{
116 /*
117 * We should exclude unmapped usages when doing lookup by keycode.
118 */
119 return (usage->type == EV_KEY && usage->code == keycode);
120}
121
122static bool match_index(struct hid_usage *usage,
123 unsigned int cur_idx, unsigned int idx)
124{
125 return cur_idx == idx;
126}
127
128typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
129 unsigned int cur_idx, unsigned int val);
130
131static struct hid_usage *hidinput_find_key(struct hid_device *hid,
132 hid_usage_cmp_t match,
133 unsigned int value,
134 unsigned int *usage_idx)
135{
136 unsigned int i, j, k, cur_idx = 0;
137 struct hid_report *report;
138 struct hid_usage *usage;
139
140 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
141 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
142 for (i = 0; i < report->maxfield; i++) {
143 for (j = 0; j < report->field[i]->maxusage; j++) {
144 usage = report->field[i]->usage + j;
145 if (usage->type == EV_KEY || usage->type == 0) {
146 if (match(usage, cur_idx, value)) {
147 if (usage_idx)
148 *usage_idx = cur_idx;
149 return usage;
150 }
151 cur_idx++;
152 }
153 }
154 }
155 }
156 }
157 return NULL;
158}
159
160static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
161 const struct input_keymap_entry *ke,
162 unsigned int *index)
163{
164 struct hid_usage *usage;
165 unsigned int scancode;
166
167 if (ke->flags & INPUT_KEYMAP_BY_INDEX)
168 usage = hidinput_find_key(hid, match_index, ke->index, index);
169 else if (input_scancode_to_scalar(ke, &scancode) == 0)
170 usage = hidinput_find_key(hid, match_scancode, scancode, index);
171 else
172 usage = NULL;
173
174 return usage;
175}
176
177static int hidinput_getkeycode(struct input_dev *dev,
178 struct input_keymap_entry *ke)
179{
180 struct hid_device *hid = input_get_drvdata(dev);
181 struct hid_usage *usage;
182 unsigned int scancode, index;
183
184 usage = hidinput_locate_usage(hid, ke, &index);
185 if (usage) {
186 ke->keycode = usage->type == EV_KEY ?
187 usage->code : KEY_RESERVED;
188 ke->index = index;
189 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
190 ke->len = sizeof(scancode);
191 memcpy(ke->scancode, &scancode, sizeof(scancode));
192 return 0;
193 }
194
195 return -EINVAL;
196}
197
198static int hidinput_setkeycode(struct input_dev *dev,
199 const struct input_keymap_entry *ke,
200 unsigned int *old_keycode)
201{
202 struct hid_device *hid = input_get_drvdata(dev);
203 struct hid_usage *usage;
204
205 usage = hidinput_locate_usage(hid, ke, NULL);
206 if (usage) {
207 *old_keycode = usage->type == EV_KEY ?
208 usage->code : KEY_RESERVED;
209 usage->type = EV_KEY;
210 usage->code = ke->keycode;
211
212 clear_bit(*old_keycode, dev->keybit);
213 set_bit(usage->code, dev->keybit);
214 dbg_hid("Assigned keycode %d to HID usage code %x\n",
215 usage->code, usage->hid);
216
217 /*
218 * Set the keybit for the old keycode if the old keycode is used
219 * by another key
220 */
221 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
222 set_bit(*old_keycode, dev->keybit);
223
224 return 0;
225 }
226
227 return -EINVAL;
228}
229
230
231/**
232 * hidinput_calc_abs_res - calculate an absolute axis resolution
233 * @field: the HID report field to calculate resolution for
234 * @code: axis code
235 *
236 * The formula is:
237 * (logical_maximum - logical_minimum)
238 * resolution = ----------------------------------------------------------
239 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent
240 *
241 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
242 *
243 * Only exponent 1 length units are processed. Centimeters and inches are
244 * converted to millimeters. Degrees are converted to radians.
245 */
246__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
247{
248 __s32 unit_exponent = field->unit_exponent;
249 __s32 logical_extents = field->logical_maximum -
250 field->logical_minimum;
251 __s32 physical_extents = field->physical_maximum -
252 field->physical_minimum;
253 __s32 prev;
254
255 /* Check if the extents are sane */
256 if (logical_extents <= 0 || physical_extents <= 0)
257 return 0;
258
259 /*
260 * Verify and convert units.
261 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
262 */
263 switch (code) {
264 case ABS_X:
265 case ABS_Y:
266 case ABS_Z:
267 case ABS_MT_POSITION_X:
268 case ABS_MT_POSITION_Y:
269 case ABS_MT_TOOL_X:
270 case ABS_MT_TOOL_Y:
271 case ABS_MT_TOUCH_MAJOR:
272 case ABS_MT_TOUCH_MINOR:
273 if (field->unit == 0x11) { /* If centimeters */
274 /* Convert to millimeters */
275 unit_exponent += 1;
276 } else if (field->unit == 0x13) { /* If inches */
277 /* Convert to millimeters */
278 prev = physical_extents;
279 physical_extents *= 254;
280 if (physical_extents < prev)
281 return 0;
282 unit_exponent -= 1;
283 } else {
284 return 0;
285 }
286 break;
287
288 case ABS_RX:
289 case ABS_RY:
290 case ABS_RZ:
291 case ABS_WHEEL:
292 case ABS_TILT_X:
293 case ABS_TILT_Y:
294 if (field->unit == 0x14) { /* If degrees */
295 /* Convert to radians */
296 prev = logical_extents;
297 logical_extents *= 573;
298 if (logical_extents < prev)
299 return 0;
300 unit_exponent += 1;
301 } else if (field->unit != 0x12) { /* If not radians */
302 return 0;
303 }
304 break;
305
306 case ABS_PRESSURE:
307 case ABS_MT_PRESSURE:
308 if (field->unit == HID_UNIT_NEWTON) {
309 /* Convert to grams, 1 newton is 101.97 grams */
310 prev = physical_extents;
311 physical_extents *= 10197;
312 if (physical_extents < prev)
313 return 0;
314 unit_exponent -= 2;
315 } else if (field->unit != HID_UNIT_GRAM) {
316 return 0;
317 }
318 break;
319 default:
320 return 0;
321 }
322
323 /* Apply negative unit exponent */
324 for (; unit_exponent < 0; unit_exponent++) {
325 prev = logical_extents;
326 logical_extents *= 10;
327 if (logical_extents < prev)
328 return 0;
329 }
330 /* Apply positive unit exponent */
331 for (; unit_exponent > 0; unit_exponent--) {
332 prev = physical_extents;
333 physical_extents *= 10;
334 if (physical_extents < prev)
335 return 0;
336 }
337
338 /* Calculate resolution */
339 return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
340}
341EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
342
343#ifdef CONFIG_HID_BATTERY_STRENGTH
344static enum power_supply_property hidinput_battery_props[] = {
345 POWER_SUPPLY_PROP_PRESENT,
346 POWER_SUPPLY_PROP_ONLINE,
347 POWER_SUPPLY_PROP_CAPACITY,
348 POWER_SUPPLY_PROP_MODEL_NAME,
349 POWER_SUPPLY_PROP_STATUS,
350 POWER_SUPPLY_PROP_SCOPE,
351};
352
353#define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
354#define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
355#define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
356#define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */
357#define HID_BATTERY_QUIRK_DYNAMIC (1 << 4) /* report present only after life signs */
358
359static const struct hid_device_id hid_battery_quirks[] = {
360 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
361 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
362 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
363 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
364 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
365 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
366 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
367 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
368 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
369 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
370 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
371 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
372 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
373 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
374 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
375 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
376 USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
377 HID_BATTERY_QUIRK_IGNORE },
378 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
379 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC),
380 HID_BATTERY_QUIRK_AVOID_QUERY },
381 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
382 USB_DEVICE_ID_ELECOM_BM084),
383 HID_BATTERY_QUIRK_IGNORE },
384 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
385 USB_DEVICE_ID_SYMBOL_SCANNER_3),
386 HID_BATTERY_QUIRK_IGNORE },
387 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
388 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
389 HID_BATTERY_QUIRK_IGNORE },
390 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
391 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
392 HID_BATTERY_QUIRK_IGNORE },
393 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
394 HID_BATTERY_QUIRK_AVOID_QUERY },
395 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
396 HID_BATTERY_QUIRK_AVOID_QUERY },
397 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
398 HID_BATTERY_QUIRK_AVOID_QUERY },
399 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
400 HID_BATTERY_QUIRK_AVOID_QUERY },
401 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_PRO_12IN),
402 HID_BATTERY_QUIRK_IGNORE },
403 /*
404 * Elan HID touchscreens seem to all report a non present battery,
405 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
406 */
407 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC },
408 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC },
409 {}
410};
411
412static unsigned find_battery_quirk(struct hid_device *hdev)
413{
414 unsigned quirks = 0;
415 const struct hid_device_id *match;
416
417 match = hid_match_id(hdev, hid_battery_quirks);
418 if (match != NULL)
419 quirks = match->driver_data;
420
421 return quirks;
422}
423
424static int hidinput_scale_battery_capacity(struct hid_battery *bat,
425 int value)
426{
427 if (bat->min < bat->max &&
428 value >= bat->min && value <= bat->max)
429 value = ((value - bat->min) * 100) /
430 (bat->max - bat->min);
431
432 return value;
433}
434
435static int hidinput_query_battery_capacity(struct hid_battery *bat)
436{
437 int ret;
438 /*
439 * The capacity field may not be the first field in the report: some
440 * devices (e.g. the Apple Magic Trackpad 2 over Bluetooth) precede it
441 * with status flags. Read it from its actual byte offset in the report
442 * (report_offset is in bits; the leading byte is the report id).
443 */
444 int offset = 1 + bat->report_offset / 8;
445 int len = offset + 1;
446
447 u8 *buf __free(kfree) = kmalloc(max(len, 4), GFP_KERNEL);
448 if (!buf)
449 return -ENOMEM;
450
451 ret = hid_hw_raw_request(bat->dev, bat->report_id, buf, max(len, 4),
452 bat->report_type, HID_REQ_GET_REPORT);
453 if (ret < len)
454 return -ENODATA;
455
456 return hidinput_scale_battery_capacity(bat, buf[offset]);
457}
458
459static int hidinput_get_battery_property(struct power_supply *psy,
460 enum power_supply_property prop,
461 union power_supply_propval *val)
462{
463 struct hid_battery *bat = power_supply_get_drvdata(psy);
464 struct hid_device *dev = bat->dev;
465 int value;
466 int ret = 0;
467
468 switch (prop) {
469 case POWER_SUPPLY_PROP_ONLINE:
470 val->intval = 1;
471 break;
472
473 case POWER_SUPPLY_PROP_PRESENT:
474 val->intval = bat->present;
475 break;
476
477 case POWER_SUPPLY_PROP_CAPACITY:
478 if (bat->status != HID_BATTERY_REPORTED &&
479 !bat->avoid_query) {
480 value = hidinput_query_battery_capacity(bat);
481 if (value < 0)
482 return value;
483 } else {
484 value = bat->capacity;
485 }
486
487 val->intval = value;
488 break;
489
490 case POWER_SUPPLY_PROP_MODEL_NAME:
491 val->strval = dev->name;
492 break;
493
494 case POWER_SUPPLY_PROP_STATUS:
495 if (bat->status != HID_BATTERY_REPORTED &&
496 !bat->avoid_query) {
497 value = hidinput_query_battery_capacity(bat);
498 if (value < 0)
499 return value;
500
501 bat->capacity = value;
502 bat->status = HID_BATTERY_QUERIED;
503 }
504
505 if (bat->status == HID_BATTERY_UNKNOWN)
506 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
507 else
508 val->intval = bat->charge_status;
509 break;
510
511 case POWER_SUPPLY_PROP_SCOPE:
512 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
513 break;
514
515 default:
516 ret = -EINVAL;
517 break;
518 }
519
520 return ret;
521}
522
523static struct hid_battery *hidinput_find_battery(struct hid_device *dev,
524 int report_id)
525{
526 struct hid_battery *bat;
527
528 list_for_each_entry(bat, &dev->batteries, list) {
529 if (bat->report_id == report_id)
530 return bat;
531 }
532 return NULL;
533}
534
535static void hidinput_cleanup_battery(void *res)
536{
537 struct hid_battery *bat = res;
538
539 list_del(&bat->list);
540}
541
542static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
543 struct hid_field *field, bool is_percentage)
544{
545 struct hid_battery *bat;
546 struct power_supply_desc *psy_desc;
547 struct power_supply_config psy_cfg = { 0 };
548 unsigned quirks;
549 s32 min, max;
550 int error;
551
552 /* Check if battery for this report ID already exists */
553 if (hidinput_find_battery(dev, field->report->id))
554 return 0;
555
556 quirks = find_battery_quirk(dev);
557
558 hid_dbg(dev, "device %x:%x:%x %d quirks %d report_id %d\n",
559 dev->bus, dev->vendor, dev->product, dev->version, quirks,
560 field->report->id);
561
562 if (quirks & HID_BATTERY_QUIRK_IGNORE)
563 return 0;
564
565 bat = devm_kzalloc(&dev->dev, sizeof(*bat), GFP_KERNEL);
566 if (!bat)
567 return -ENOMEM;
568
569 psy_desc = devm_kzalloc(&dev->dev, sizeof(*psy_desc), GFP_KERNEL);
570 if (!psy_desc) {
571 error = -ENOMEM;
572 goto err_free_bat;
573 }
574
575 psy_desc->name = devm_kasprintf(&dev->dev, GFP_KERNEL,
576 "hid-%s-battery-%d",
577 strlen(dev->uniq) ?
578 dev->uniq : dev_name(&dev->dev),
579 field->report->id);
580 if (!psy_desc->name) {
581 error = -ENOMEM;
582 goto err_free_desc;
583 }
584
585 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
586 psy_desc->properties = hidinput_battery_props;
587 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
588 psy_desc->use_for_apm = 0;
589 psy_desc->get_property = hidinput_get_battery_property;
590
591 min = field->logical_minimum;
592 max = field->logical_maximum;
593
594 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
595 min = 0;
596 max = 100;
597 }
598
599 if (quirks & HID_BATTERY_QUIRK_FEATURE)
600 report_type = HID_FEATURE_REPORT;
601
602 bat->dev = dev;
603 bat->min = min;
604 bat->max = max;
605 bat->report_type = report_type;
606 bat->report_id = field->report->id;
607 bat->report_offset = field->report_offset;
608 bat->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
609 bat->status = HID_BATTERY_UNKNOWN;
610
611 /*
612 * Stylus is normally not connected to the device and thus we
613 * can't query the device and get meaningful battery strength.
614 * We have to wait for the device to report it on its own.
615 */
616 bat->avoid_query = report_type == HID_INPUT_REPORT &&
617 field->physical == HID_DG_STYLUS;
618
619 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
620 bat->avoid_query = true;
621
622 bat->present = (quirks & HID_BATTERY_QUIRK_DYNAMIC) ? false : true;
623
624 psy_cfg.drv_data = bat;
625 bat->ps = devm_power_supply_register(&dev->dev, psy_desc, &psy_cfg);
626 if (IS_ERR(bat->ps)) {
627 error = PTR_ERR(bat->ps);
628 hid_warn(dev, "can't register power supply: %d\n", error);
629 goto err_free_name;
630 }
631
632 power_supply_powers(bat->ps, &dev->dev);
633 list_add_tail(&bat->list, &dev->batteries);
634
635 error = devm_add_action_or_reset(&dev->dev,
636 hidinput_cleanup_battery, bat);
637 if (error)
638 return error;
639
640 return 0;
641
642err_free_name:
643 devm_kfree(&dev->dev, psy_desc->name);
644err_free_desc:
645 devm_kfree(&dev->dev, psy_desc);
646err_free_bat:
647 devm_kfree(&dev->dev, bat);
648 return error;
649}
650
651static bool hidinput_update_battery_charge_status(struct hid_battery *bat,
652 unsigned int usage, int value)
653{
654 switch (usage) {
655 case HID_BAT_CHARGING:
656 bat->charge_status = value ?
657 POWER_SUPPLY_STATUS_CHARGING :
658 POWER_SUPPLY_STATUS_DISCHARGING;
659 return true;
660 }
661
662 return false;
663}
664
665static void hidinput_update_battery(struct hid_device *dev, int report_id,
666 unsigned int usage, int value)
667{
668 struct hid_battery *bat;
669 int capacity;
670
671 bat = hidinput_find_battery(dev, report_id);
672 if (!bat)
673 return;
674
675 if (hidinput_update_battery_charge_status(bat, usage, value)) {
676 bat->present = true;
677 power_supply_changed(bat->ps);
678 return;
679 }
680
681 if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
682 return;
683
684 if (value < bat->min || value > bat->max)
685 return;
686
687 capacity = hidinput_scale_battery_capacity(bat, value);
688
689 if (bat->status != HID_BATTERY_REPORTED ||
690 capacity != bat->capacity ||
691 ktime_after(ktime_get_coarse(), bat->ratelimit_time)) {
692 bat->present = true;
693 bat->capacity = capacity;
694 bat->status = HID_BATTERY_REPORTED;
695 bat->ratelimit_time =
696 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
697 power_supply_changed(bat->ps);
698 }
699}
700#else /* !CONFIG_HID_BATTERY_STRENGTH */
701static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
702 struct hid_field *field, bool is_percentage)
703{
704 return 0;
705}
706
707static void hidinput_update_battery(struct hid_device *dev, int report_id,
708 unsigned int usage, int value)
709{
710}
711#endif /* CONFIG_HID_BATTERY_STRENGTH */
712
713static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
714 unsigned int type, unsigned int usage)
715{
716 struct hid_collection *collection;
717
718 collection = &device->collection[field->usage->collection_index];
719
720 return collection->type == type && collection->usage == usage;
721}
722
723static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
724 struct hid_usage *usage, unsigned int usage_index)
725{
726 struct input_dev *input = hidinput->input;
727 struct hid_device *device = input_get_drvdata(input);
728 const struct usage_priority *usage_priority = NULL;
729 int max = 0, code;
730 unsigned int i = 0;
731 unsigned long *bit = NULL;
732
733 field->hidinput = hidinput;
734
735 if (field->flags & HID_MAIN_ITEM_CONSTANT)
736 goto ignore;
737
738 /* Ignore if report count is out of bounds. */
739 if (field->report_count < 1)
740 goto ignore;
741
742 /* only LED and HAPTIC usages are supported in output fields */
743 if (field->report_type == HID_OUTPUT_REPORT &&
744 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
745 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
746 goto ignore;
747 }
748
749 /* assign a priority based on the static list declared here */
750 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
751 if (usage->hid == hidinput_usages_priorities[i].usage) {
752 usage_priority = &hidinput_usages_priorities[i];
753
754 field->usages_priorities[usage_index] =
755 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
756 break;
757 }
758 }
759
760 /*
761 * For slotted devices, we need to also add the slot index
762 * in the priority.
763 */
764 if (usage_priority && usage_priority->global)
765 field->usages_priorities[usage_index] |=
766 usage_priority->slot_overwrite;
767 else
768 field->usages_priorities[usage_index] |=
769 (0xff - field->slot_idx) << 16;
770
771 if (device->driver->input_mapping) {
772 int ret = device->driver->input_mapping(device, hidinput, field,
773 usage, &bit, &max);
774 if (ret > 0)
775 goto mapped;
776 if (ret < 0)
777 goto ignore;
778 }
779
780 switch (usage->hid & HID_USAGE_PAGE) {
781 case HID_UP_UNDEFINED:
782 goto ignore;
783
784 case HID_UP_KEYBOARD:
785 set_bit(EV_REP, input->evbit);
786
787 if ((usage->hid & HID_USAGE) < 256) {
788 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
789 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
790 } else
791 map_key(KEY_UNKNOWN);
792
793 break;
794
795 case HID_UP_BUTTON:
796 code = ((usage->hid - 1) & HID_USAGE);
797
798 switch (field->application) {
799 case HID_GD_MOUSE:
800 case HID_GD_POINTER: code += BTN_MOUSE; break;
801 case HID_GD_JOYSTICK:
802 if (code <= 0xf)
803 code += BTN_JOYSTICK;
804 else
805 code += BTN_TRIGGER_HAPPY - 0x10;
806 break;
807 case HID_GD_GAMEPAD:
808 if (code <= 0xf)
809 code += BTN_GAMEPAD;
810 else
811 code += BTN_TRIGGER_HAPPY - 0x10;
812 break;
813 case HID_CP_CONSUMER_CONTROL:
814 if (hidinput_field_in_collection(device, field,
815 HID_COLLECTION_NAMED_ARRAY,
816 HID_CP_PROGRAMMABLEBUTTONS)) {
817 if (code <= 0x1d)
818 code += KEY_MACRO1;
819 else
820 code += BTN_TRIGGER_HAPPY - 0x1e;
821 break;
822 }
823 fallthrough;
824 default:
825 switch (field->physical) {
826 case HID_GD_MOUSE:
827 case HID_GD_POINTER: code += BTN_MOUSE; break;
828 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
829 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
830 default: code += BTN_MISC;
831 }
832 }
833
834 map_key(code);
835 break;
836
837 case HID_UP_SIMULATION:
838 switch (usage->hid & 0xffff) {
839 case 0xba: map_abs(ABS_RUDDER); break;
840 case 0xbb: map_abs(ABS_THROTTLE); break;
841 case 0xc4: map_abs(ABS_GAS); break;
842 case 0xc5: map_abs(ABS_BRAKE); break;
843 case 0xc8: map_abs(ABS_WHEEL); break;
844 default: goto ignore;
845 }
846 break;
847
848 case HID_UP_GENDESK:
849 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
850 switch (usage->hid & 0xf) {
851 case 0x1: map_key_clear(KEY_POWER); break;
852 case 0x2: map_key_clear(KEY_SLEEP); break;
853 case 0x3: map_key_clear(KEY_WAKEUP); break;
854 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
855 case 0x5: map_key_clear(KEY_MENU); break;
856 case 0x6: map_key_clear(KEY_PROG1); break;
857 case 0x7: map_key_clear(KEY_HELP); break;
858 case 0x8: map_key_clear(KEY_EXIT); break;
859 case 0x9: map_key_clear(KEY_SELECT); break;
860 case 0xa: map_key_clear(KEY_RIGHT); break;
861 case 0xb: map_key_clear(KEY_LEFT); break;
862 case 0xc: map_key_clear(KEY_UP); break;
863 case 0xd: map_key_clear(KEY_DOWN); break;
864 case 0xe: map_key_clear(KEY_POWER2); break;
865 case 0xf: map_key_clear(KEY_RESTART); break;
866 default: goto unknown;
867 }
868 break;
869 }
870
871 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
872 switch (usage->hid) {
873 case HID_GD_UP: usage->hat_dir = 1; break;
874 case HID_GD_DOWN: usage->hat_dir = 5; break;
875 case HID_GD_RIGHT: usage->hat_dir = 3; break;
876 case HID_GD_LEFT: usage->hat_dir = 7; break;
877 case HID_GD_DO_NOT_DISTURB:
878 map_key_clear(KEY_DO_NOT_DISTURB); break;
879 default: goto unknown;
880 }
881
882 if (usage->hid <= HID_GD_LEFT) {
883 if (field->dpad) {
884 map_abs(field->dpad);
885 goto ignore;
886 }
887 map_abs(ABS_HAT0X);
888 }
889 break;
890 }
891
892 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
893 switch (usage->hid & 0xf) {
894 case 0x9: map_key_clear(KEY_MICMUTE); break;
895 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
896 default: goto ignore;
897 }
898 break;
899 }
900
901 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
902 switch (usage->hid & 0xf) {
903 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
904 default: goto ignore;
905 }
906 break;
907 }
908
909 /*
910 * Some lazy vendors declare 255 usages for System Control,
911 * leading to the creation of ABS_X|Y axis and too many others.
912 * It wouldn't be a problem if joydev doesn't consider the
913 * device as a joystick then.
914 */
915 if (field->application == HID_GD_SYSTEM_CONTROL)
916 goto ignore;
917
918 switch (usage->hid) {
919 /* These usage IDs map directly to the usage codes. */
920 case HID_GD_X: case HID_GD_Y:
921 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
922 if (field->flags & HID_MAIN_ITEM_RELATIVE)
923 map_rel(usage->hid & 0xf);
924 else
925 map_abs_clear(usage->hid & 0xf);
926 break;
927
928 case HID_GD_Z:
929 /* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */
930 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
931 map_rel(usage->hid & 0xf);
932 } else {
933 if (field->application == HID_DG_PEN ||
934 field->physical == HID_DG_PEN ||
935 field->logical == HID_DG_STYLUS ||
936 field->physical == HID_DG_STYLUS ||
937 field->application == HID_DG_DIGITIZER)
938 map_abs_clear(ABS_DISTANCE);
939 else
940 map_abs_clear(usage->hid & 0xf);
941 }
942 break;
943
944 case HID_GD_WHEEL:
945 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
946 set_bit(REL_WHEEL, input->relbit);
947 map_rel(REL_WHEEL_HI_RES);
948 } else {
949 map_abs(usage->hid & 0xf);
950 }
951 break;
952 case HID_GD_SLIDER: case HID_GD_DIAL:
953 if (field->flags & HID_MAIN_ITEM_RELATIVE)
954 map_rel(usage->hid & 0xf);
955 else
956 map_abs(usage->hid & 0xf);
957 break;
958
959 case HID_GD_HATSWITCH:
960 usage->hat_min = field->logical_minimum;
961 usage->hat_max = field->logical_maximum;
962 map_abs(ABS_HAT0X);
963 break;
964
965 case HID_GD_START: map_key_clear(BTN_START); break;
966 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
967
968 case HID_GD_RFKILL_BTN:
969 /* MS wireless radio ctl extension, also check CA */
970 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
971 map_key_clear(KEY_RFKILL);
972 /* We need to simulate the btn release */
973 field->flags |= HID_MAIN_ITEM_RELATIVE;
974 break;
975 }
976 goto unknown;
977
978 default: goto unknown;
979 }
980
981 break;
982
983 case HID_UP_LED:
984 switch (usage->hid & 0xffff) { /* HID-Value: */
985 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
986 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
987 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
988 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
989 case 0x05: map_led (LED_KANA); break; /* "Kana" */
990 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
991 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
992 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
993 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
994 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
995 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
996
997 default: goto ignore;
998 }
999 break;
1000
1001 case HID_UP_DIGITIZER:
1002 if ((field->application & 0xff) == 0x01) /* Digitizer */
1003 __set_bit(INPUT_PROP_POINTER, input->propbit);
1004 else if ((field->application & 0xff) == 0x02) /* Pen */
1005 __set_bit(INPUT_PROP_DIRECT, input->propbit);
1006
1007 switch (usage->hid & 0xff) {
1008 case 0x00: /* Undefined */
1009 goto ignore;
1010
1011 case 0x30: /* TipPressure */
1012 if (!test_bit(BTN_TOUCH, input->keybit)) {
1013 device->quirks |= HID_QUIRK_NOTOUCH;
1014 set_bit(EV_KEY, input->evbit);
1015 set_bit(BTN_TOUCH, input->keybit);
1016 }
1017 map_abs_clear(ABS_PRESSURE);
1018 break;
1019
1020 case 0x32: /* InRange */
1021 switch (field->physical) {
1022 case HID_DG_PUCK:
1023 map_key(BTN_TOOL_MOUSE);
1024 break;
1025 case HID_DG_FINGER:
1026 map_key(BTN_TOOL_FINGER);
1027 break;
1028 default:
1029 /*
1030 * If the physical is not given,
1031 * rely on the application.
1032 */
1033 if (!field->physical) {
1034 switch (field->application) {
1035 case HID_DG_TOUCHSCREEN:
1036 case HID_DG_TOUCHPAD:
1037 map_key_clear(BTN_TOOL_FINGER);
1038 break;
1039 default:
1040 map_key_clear(BTN_TOOL_PEN);
1041 }
1042 } else {
1043 map_key(BTN_TOOL_PEN);
1044 }
1045 break;
1046 }
1047 break;
1048
1049 case 0x3b: /* Battery Strength */
1050 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1051 usage->type = EV_PWR;
1052 return;
1053
1054 case 0x3c: /* Invert */
1055 device->quirks &= ~HID_QUIRK_NOINVERT;
1056 map_key_clear(BTN_TOOL_RUBBER);
1057 break;
1058
1059 case 0x3d: /* X Tilt */
1060 map_abs_clear(ABS_TILT_X);
1061 break;
1062
1063 case 0x3e: /* Y Tilt */
1064 map_abs_clear(ABS_TILT_Y);
1065 break;
1066
1067 case 0x33: /* Touch */
1068 case 0x42: /* TipSwitch */
1069 case 0x43: /* TipSwitch2 */
1070 device->quirks &= ~HID_QUIRK_NOTOUCH;
1071 map_key_clear(BTN_TOUCH);
1072 break;
1073
1074 case 0x44: /* BarrelSwitch */
1075 map_key_clear(BTN_STYLUS);
1076 break;
1077
1078 case 0x45: /* ERASER */
1079 /*
1080 * This event is reported when eraser tip touches the surface.
1081 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1082 * by Invert if tool reports proximity or by Eraser directly.
1083 */
1084 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1085 device->quirks |= HID_QUIRK_NOINVERT;
1086 set_bit(BTN_TOOL_RUBBER, input->keybit);
1087 }
1088 map_key_clear(BTN_TOUCH);
1089 break;
1090
1091 case 0x46: /* TabletPick */
1092 case 0x5a: /* SecondaryBarrelSwitch */
1093 map_key_clear(BTN_STYLUS2);
1094 break;
1095
1096 case 0x5b: /* TransducerSerialNumber */
1097 case 0x6e: /* TransducerSerialNumber2 */
1098 map_msc(MSC_SERIAL);
1099 break;
1100
1101 default: goto unknown;
1102 }
1103 break;
1104
1105 case HID_UP_TELEPHONY:
1106 switch (usage->hid & HID_USAGE) {
1107 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1108 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1109 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1110 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1111 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1112 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1113 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1114 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1115 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1116 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1117 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1118 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1119 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1120 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1121 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1122 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1123 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1124 default: goto ignore;
1125 }
1126 break;
1127
1128 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1129 switch (usage->hid & HID_USAGE) {
1130 case 0x000: goto ignore;
1131 case 0x030: map_key_clear(KEY_POWER); break;
1132 case 0x031: map_key_clear(KEY_RESTART); break;
1133 case 0x032: map_key_clear(KEY_SLEEP); break;
1134 case 0x034: map_key_clear(KEY_SLEEP); break;
1135 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1136 case 0x036: map_key_clear(BTN_MISC); break;
1137
1138 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1139 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1140 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1141 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1142 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1143 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1144 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1145 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1146 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1147
1148 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1149 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1150 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1151 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1152 case 0x069: map_key_clear(KEY_RED); break;
1153 case 0x06a: map_key_clear(KEY_GREEN); break;
1154 case 0x06b: map_key_clear(KEY_BLUE); break;
1155 case 0x06c: map_key_clear(KEY_YELLOW); break;
1156 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1157
1158 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1159 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1160 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1161 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1162 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1163 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1164
1165 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1166 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1167 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1168
1169 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1170 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1171 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1172
1173 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1174 case 0x083: map_key_clear(KEY_LAST); break;
1175 case 0x084: map_key_clear(KEY_ENTER); break;
1176 case 0x088: map_key_clear(KEY_PC); break;
1177 case 0x089: map_key_clear(KEY_TV); break;
1178 case 0x08a: map_key_clear(KEY_WWW); break;
1179 case 0x08b: map_key_clear(KEY_DVD); break;
1180 case 0x08c: map_key_clear(KEY_PHONE); break;
1181 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1182 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1183 case 0x08f: map_key_clear(KEY_GAMES); break;
1184 case 0x090: map_key_clear(KEY_MEMO); break;
1185 case 0x091: map_key_clear(KEY_CD); break;
1186 case 0x092: map_key_clear(KEY_VCR); break;
1187 case 0x093: map_key_clear(KEY_TUNER); break;
1188 case 0x094: map_key_clear(KEY_EXIT); break;
1189 case 0x095: map_key_clear(KEY_HELP); break;
1190 case 0x096: map_key_clear(KEY_TAPE); break;
1191 case 0x097: map_key_clear(KEY_TV2); break;
1192 case 0x098: map_key_clear(KEY_SAT); break;
1193 case 0x09a: map_key_clear(KEY_PVR); break;
1194
1195 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1196 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1197 case 0x0a0: map_key_clear(KEY_VCR2); break;
1198
1199 case 0x0b0: map_key_clear(KEY_PLAY); break;
1200 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1201 case 0x0b2: map_key_clear(KEY_RECORD); break;
1202 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1203 case 0x0b4: map_key_clear(KEY_REWIND); break;
1204 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1205 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1206 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1207 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1208 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1209 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1210 case 0x0bf: map_key_clear(KEY_SLOW); break;
1211
1212 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1213 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1214
1215 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1216 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1217
1218 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1219 case 0x0e2: map_key_clear(KEY_MUTE); break;
1220 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1221 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1222 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1223 case 0x0f5: map_key_clear(KEY_SLOW); break;
1224
1225 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1226 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1227 case 0x183: map_key_clear(KEY_CONFIG); break;
1228 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1229 case 0x185: map_key_clear(KEY_EDITOR); break;
1230 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1231 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1232 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1233 case 0x189: map_key_clear(KEY_DATABASE); break;
1234 case 0x18a: map_key_clear(KEY_MAIL); break;
1235 case 0x18b: map_key_clear(KEY_NEWS); break;
1236 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1237 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1238 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1239 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1240 case 0x190: map_key_clear(KEY_JOURNAL); break;
1241 case 0x191: map_key_clear(KEY_FINANCE); break;
1242 case 0x192: map_key_clear(KEY_CALC); break;
1243 case 0x193: map_key_clear(KEY_PLAYER); break;
1244 case 0x194: map_key_clear(KEY_FILE); break;
1245 case 0x196: map_key_clear(KEY_WWW); break;
1246 case 0x199: map_key_clear(KEY_CHAT); break;
1247 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1248 case 0x19e: map_key_clear(KEY_COFFEE); break;
1249 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1250 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1251 case 0x1a3: map_key_clear(KEY_NEXT); break;
1252 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1253 case 0x1a6: map_key_clear(KEY_HELP); break;
1254 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1255 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1256 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1257 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1258 case 0x1b4: map_key_clear(KEY_FILE); break;
1259 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1260 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1261 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1262 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1263 case 0x1bd: map_key_clear(KEY_INFO); break;
1264 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1265 case 0x1cc: map_key_clear(KEY_ACTION_ON_SELECTION); break;
1266 case 0x1cd: map_key_clear(KEY_CONTEXTUAL_INSERT); break;
1267 case 0x1ce: map_key_clear(KEY_CONTEXTUAL_QUERY); break;
1268 case 0x201: map_key_clear(KEY_NEW); break;
1269 case 0x202: map_key_clear(KEY_OPEN); break;
1270 case 0x203: map_key_clear(KEY_CLOSE); break;
1271 case 0x204: map_key_clear(KEY_EXIT); break;
1272 case 0x207: map_key_clear(KEY_SAVE); break;
1273 case 0x208: map_key_clear(KEY_PRINT); break;
1274 case 0x209: map_key_clear(KEY_PROPS); break;
1275 case 0x21a: map_key_clear(KEY_UNDO); break;
1276 case 0x21b: map_key_clear(KEY_COPY); break;
1277 case 0x21c: map_key_clear(KEY_CUT); break;
1278 case 0x21d: map_key_clear(KEY_PASTE); break;
1279 case 0x21f: map_key_clear(KEY_FIND); break;
1280 case 0x221: map_key_clear(KEY_SEARCH); break;
1281 case 0x222: map_key_clear(KEY_GOTO); break;
1282 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1283 case 0x224: map_key_clear(KEY_BACK); break;
1284 case 0x225: map_key_clear(KEY_FORWARD); break;
1285 case 0x226: map_key_clear(KEY_STOP); break;
1286 case 0x227: map_key_clear(KEY_REFRESH); break;
1287 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1288 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1289 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1290 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1291 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1292 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1293 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1294 case 0x238: /* AC Pan */
1295 set_bit(REL_HWHEEL, input->relbit);
1296 map_rel(REL_HWHEEL_HI_RES);
1297 break;
1298 case 0x23d: map_key_clear(KEY_EDIT); break;
1299 case 0x25f: map_key_clear(KEY_CANCEL); break;
1300 case 0x269: map_key_clear(KEY_INSERT); break;
1301 case 0x26a: map_key_clear(KEY_DELETE); break;
1302 case 0x279: map_key_clear(KEY_REDO); break;
1303
1304 case 0x289: map_key_clear(KEY_REPLY); break;
1305 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1306 case 0x28c: map_key_clear(KEY_SEND); break;
1307
1308 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1309
1310 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1311
1312 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1313 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1314 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1315 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1316 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1317 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1318
1319 case 0x29f: map_key_clear(KEY_SCALE); break;
1320
1321 default: map_key_clear(KEY_UNKNOWN);
1322 }
1323 break;
1324
1325 case HID_UP_GENDEVCTRLS:
1326 switch (usage->hid) {
1327 case HID_DC_BATTERYSTRENGTH:
1328 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1329 usage->type = EV_PWR;
1330 return;
1331 }
1332 goto unknown;
1333
1334 case HID_UP_BATTERY:
1335 switch (usage->hid) {
1336 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1337 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1338 usage->type = EV_PWR;
1339 return;
1340 case HID_BAT_CHARGING:
1341 usage->type = EV_PWR;
1342 return;
1343 }
1344 goto unknown;
1345 case HID_UP_CAMERA:
1346 switch (usage->hid & HID_USAGE) {
1347 case 0x020:
1348 map_key_clear(KEY_CAMERA_FOCUS); break;
1349 case 0x021:
1350 map_key_clear(KEY_CAMERA); break;
1351 default:
1352 goto ignore;
1353 }
1354 break;
1355
1356 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1357 set_bit(EV_REP, input->evbit);
1358 switch (usage->hid & HID_USAGE) {
1359 case 0x021: map_key_clear(KEY_PRINT); break;
1360 case 0x070: map_key_clear(KEY_HP); break;
1361 case 0x071: map_key_clear(KEY_CAMERA); break;
1362 case 0x072: map_key_clear(KEY_SOUND); break;
1363 case 0x073: map_key_clear(KEY_QUESTION); break;
1364 case 0x080: map_key_clear(KEY_EMAIL); break;
1365 case 0x081: map_key_clear(KEY_CHAT); break;
1366 case 0x082: map_key_clear(KEY_SEARCH); break;
1367 case 0x083: map_key_clear(KEY_CONNECT); break;
1368 case 0x084: map_key_clear(KEY_FINANCE); break;
1369 case 0x085: map_key_clear(KEY_SPORT); break;
1370 case 0x086: map_key_clear(KEY_SHOP); break;
1371 default: goto ignore;
1372 }
1373 break;
1374
1375 case HID_UP_HPVENDOR2:
1376 set_bit(EV_REP, input->evbit);
1377 switch (usage->hid & HID_USAGE) {
1378 case 0x001: map_key_clear(KEY_MICMUTE); break;
1379 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1380 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1381 default: goto ignore;
1382 }
1383 break;
1384
1385 case HID_UP_MSVENDOR:
1386 goto ignore;
1387
1388 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1389 set_bit(EV_REP, input->evbit);
1390 goto ignore;
1391
1392 case HID_UP_LOGIVENDOR:
1393 /* intentional fallback */
1394 case HID_UP_LOGIVENDOR2:
1395 /* intentional fallback */
1396 case HID_UP_LOGIVENDOR3:
1397 goto ignore;
1398
1399 case HID_UP_PID:
1400 switch (usage->hid & HID_USAGE) {
1401 case 0xa4: map_key_clear(BTN_DEAD); break;
1402 default: goto ignore;
1403 }
1404 break;
1405
1406 default:
1407 unknown:
1408 if (field->report_size == 1) {
1409 if (field->report->type == HID_OUTPUT_REPORT) {
1410 map_led(LED_MISC);
1411 break;
1412 }
1413 map_key(BTN_MISC);
1414 break;
1415 }
1416 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1417 map_rel(REL_MISC);
1418 break;
1419 }
1420 map_abs(ABS_MISC);
1421 break;
1422 }
1423
1424mapped:
1425 /* Mapping failed, bail out */
1426 if (!bit)
1427 return;
1428
1429 if (device->driver->input_mapped &&
1430 device->driver->input_mapped(device, hidinput, field, usage,
1431 &bit, &max) < 0) {
1432 /*
1433 * The driver indicated that no further generic handling
1434 * of the usage is desired.
1435 */
1436 return;
1437 }
1438
1439 set_bit(usage->type, input->evbit);
1440
1441 /*
1442 * This part is *really* controversial:
1443 * - HID aims at being generic so we should do our best to export
1444 * all incoming events
1445 * - HID describes what events are, so there is no reason for ABS_X
1446 * to be mapped to ABS_Y
1447 * - HID is using *_MISC+N as a default value, but nothing prevents
1448 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1449 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1450 * processing)
1451 *
1452 * If devices still want to use this (at their own risk), they will
1453 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1454 * the default should be a reliable mapping.
1455 */
1456 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1457 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1458 usage->code = find_next_zero_bit(bit,
1459 max + 1,
1460 usage->code);
1461 } else {
1462 device->status |= HID_STAT_DUP_DETECTED;
1463 goto ignore;
1464 }
1465 }
1466
1467 if (usage->code > max)
1468 goto ignore;
1469
1470 if (usage->type == EV_ABS) {
1471
1472 int a = field->logical_minimum;
1473 int b = field->logical_maximum;
1474
1475 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1476 a = field->logical_minimum = 0;
1477 b = field->logical_maximum = 255;
1478 }
1479
1480 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1481 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1482 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1483
1484 input_abs_set_res(input, usage->code,
1485 hidinput_calc_abs_res(field, usage->code));
1486
1487 /* use a larger default input buffer for MT devices */
1488 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1489 input_set_events_per_packet(input, 60);
1490 }
1491
1492 if (usage->type == EV_ABS &&
1493 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1494 int i;
1495 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1496 input_set_abs_params(input, i, -1, 1, 0, 0);
1497 set_bit(i, input->absbit);
1498 }
1499 if (usage->hat_dir && !field->dpad)
1500 field->dpad = usage->code;
1501 }
1502
1503 /* for those devices which produce Consumer volume usage as relative,
1504 * we emulate pressing volumeup/volumedown appropriate number of times
1505 * in hidinput_hid_event()
1506 */
1507 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1508 (usage->code == ABS_VOLUME)) {
1509 set_bit(KEY_VOLUMEUP, input->keybit);
1510 set_bit(KEY_VOLUMEDOWN, input->keybit);
1511 }
1512
1513 if (usage->type == EV_KEY) {
1514 set_bit(EV_MSC, input->evbit);
1515 set_bit(MSC_SCAN, input->mscbit);
1516 }
1517
1518 return;
1519
1520ignore:
1521 usage->type = 0;
1522 usage->code = 0;
1523}
1524
1525static void hidinput_handle_scroll(struct hid_usage *usage,
1526 struct input_dev *input,
1527 __s32 value)
1528{
1529 int code;
1530 int hi_res, lo_res;
1531
1532 if (value == 0)
1533 return;
1534
1535 if (usage->code == REL_WHEEL_HI_RES)
1536 code = REL_WHEEL;
1537 else
1538 code = REL_HWHEEL;
1539
1540 /*
1541 * Windows reports one wheel click as value 120. Where a high-res
1542 * scroll wheel is present, a fraction of 120 is reported instead.
1543 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1544 * adhere to the 120 expectation.
1545 */
1546 hi_res = value * 120/usage->resolution_multiplier;
1547
1548 usage->wheel_accumulated += hi_res;
1549 lo_res = usage->wheel_accumulated/120;
1550 if (lo_res)
1551 usage->wheel_accumulated -= lo_res * 120;
1552
1553 input_event(input, EV_REL, code, lo_res);
1554 input_event(input, EV_REL, usage->code, hi_res);
1555}
1556
1557static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1558 unsigned int tool)
1559{
1560 /* if the given tool is not currently reported, ignore */
1561 if (!test_bit(tool, input->key))
1562 return;
1563
1564 /*
1565 * if the given tool was previously set, release it,
1566 * release any TOUCH and send an EV_SYN
1567 */
1568 input_event(input, EV_KEY, BTN_TOUCH, 0);
1569 input_event(input, EV_KEY, tool, 0);
1570 input_event(input, EV_SYN, SYN_REPORT, 0);
1571
1572 report->tool = 0;
1573}
1574
1575static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1576 unsigned int new_tool)
1577{
1578 if (report->tool != new_tool)
1579 hid_report_release_tool(report, input, report->tool);
1580
1581 input_event(input, EV_KEY, new_tool, 1);
1582 report->tool = new_tool;
1583}
1584
1585void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1586{
1587 struct input_dev *input;
1588 struct hid_report *report = field->report;
1589 unsigned *quirks = &hid->quirks;
1590
1591 if (!usage->type)
1592 return;
1593
1594 if (usage->type == EV_PWR) {
1595 hidinput_update_battery(hid, report->id, usage->hid, value);
1596 return;
1597 }
1598
1599 if (!field->hidinput)
1600 return;
1601
1602 input = field->hidinput->input;
1603
1604 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1605 int hat_dir = usage->hat_dir;
1606 if (!hat_dir)
1607 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1608 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1609 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1610 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1611 return;
1612 }
1613
1614 /*
1615 * Ignore out-of-range values as per HID specification,
1616 * section 5.10 and 6.2.25, when NULL state bit is present.
1617 * When it's not, clamp the value to match Microsoft's input
1618 * driver as mentioned in "Required HID usages for digitizers":
1619 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1620 *
1621 * The logical_minimum < logical_maximum check is done so that we
1622 * don't unintentionally discard values sent by devices which
1623 * don't specify logical min and max.
1624 */
1625 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1626 field->logical_minimum < field->logical_maximum) {
1627 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1628 (value < field->logical_minimum ||
1629 value > field->logical_maximum)) {
1630 dbg_hid("Ignoring out-of-range value %x\n", value);
1631 return;
1632 }
1633 value = clamp(value,
1634 field->logical_minimum,
1635 field->logical_maximum);
1636 }
1637
1638 switch (usage->hid) {
1639 case HID_DG_ERASER:
1640 report->tool_active |= !!value;
1641
1642 /*
1643 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1644 * to accommodate for devices not following the spec.
1645 */
1646 if (value)
1647 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1648 else if (report->tool != BTN_TOOL_RUBBER)
1649 /* value is off, tool is not rubber, ignore */
1650 return;
1651 else if (*quirks & HID_QUIRK_NOINVERT &&
1652 !test_bit(BTN_TOUCH, input->key)) {
1653 /*
1654 * There is no invert to release the tool, let hid_input
1655 * send BTN_TOUCH with scancode and release the tool after.
1656 */
1657 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1658 return;
1659 }
1660
1661 /* let hid-input set BTN_TOUCH */
1662 break;
1663
1664 case HID_DG_INVERT:
1665 report->tool_active |= !!value;
1666
1667 /*
1668 * If invert is set, we store BTN_TOOL_RUBBER.
1669 */
1670 if (value)
1671 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1672 else if (!report->tool_active)
1673 /* tool_active not set means Invert and Eraser are not set */
1674 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1675
1676 /* no further processing */
1677 return;
1678
1679 case HID_DG_INRANGE:
1680 report->tool_active |= !!value;
1681
1682 if (report->tool_active) {
1683 /*
1684 * if tool is not set but is marked as active,
1685 * assume ours
1686 */
1687 if (!report->tool)
1688 report->tool = usage->code;
1689
1690 /* drivers may have changed the value behind our back, resend it */
1691 hid_report_set_tool(report, input, report->tool);
1692 } else {
1693 hid_report_release_tool(report, input, usage->code);
1694 }
1695
1696 /* reset tool_active for the next event */
1697 report->tool_active = false;
1698
1699 /* no further processing */
1700 return;
1701
1702 case HID_DG_TIPSWITCH:
1703 report->tool_active |= !!value;
1704
1705 /* if tool is set to RUBBER we should ignore the current value */
1706 if (report->tool == BTN_TOOL_RUBBER)
1707 return;
1708
1709 break;
1710
1711 case HID_DG_TIPPRESSURE:
1712 if (*quirks & HID_QUIRK_NOTOUCH) {
1713 int a = field->logical_minimum;
1714 int b = field->logical_maximum;
1715
1716 if (value > a + ((b - a) >> 3)) {
1717 input_event(input, EV_KEY, BTN_TOUCH, 1);
1718 report->tool_active = true;
1719 }
1720 }
1721 break;
1722
1723 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1724 dbg_hid("Maximum Effects - %d\n",value);
1725 return;
1726
1727 case HID_UP_PID | 0x7fUL:
1728 dbg_hid("PID Pool Report\n");
1729 return;
1730 }
1731
1732 switch (usage->type) {
1733 case EV_KEY:
1734 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1735 return;
1736 break;
1737
1738 case EV_REL:
1739 if (usage->code == REL_WHEEL_HI_RES ||
1740 usage->code == REL_HWHEEL_HI_RES) {
1741 hidinput_handle_scroll(usage, input, value);
1742 return;
1743 }
1744 break;
1745
1746 case EV_ABS:
1747 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1748 usage->code == ABS_VOLUME) {
1749 int count = abs(value);
1750 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1751 int i;
1752
1753 for (i = 0; i < count; i++) {
1754 input_event(input, EV_KEY, direction, 1);
1755 input_sync(input);
1756 input_event(input, EV_KEY, direction, 0);
1757 input_sync(input);
1758 }
1759 return;
1760
1761 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1762 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1763 value = field->logical_maximum - value;
1764 break;
1765 }
1766
1767 /*
1768 * Ignore reports for absolute data if the data didn't change. This is
1769 * not only an optimization but also fixes 'dead' key reports. Some
1770 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1771 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1772 * can only have one of them physically available. The 'dead' keys
1773 * report constant 0. As all map to the same keycode, they'd confuse
1774 * the input layer. If we filter the 'dead' keys on the HID level, we
1775 * skip the keycode translation and only forward real events.
1776 */
1777 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1778 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1779 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1780 usage->usage_index < field->maxusage &&
1781 value == field->value[usage->usage_index])
1782 return;
1783
1784 /* report the usage code as scancode if the key status has changed */
1785 if (usage->type == EV_KEY &&
1786 (!test_bit(usage->code, input->key)) == value)
1787 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1788
1789 input_event(input, usage->type, usage->code, value);
1790
1791 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1792 usage->type == EV_KEY && value) {
1793 input_sync(input);
1794 input_event(input, usage->type, usage->code, 0);
1795 }
1796}
1797
1798void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1799{
1800 struct hid_input *hidinput;
1801
1802 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1803 return;
1804
1805 list_for_each_entry(hidinput, &hid->inputs, list)
1806 input_sync(hidinput->input);
1807}
1808EXPORT_SYMBOL_GPL(hidinput_report_event);
1809
1810static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1811 unsigned int code, struct hid_field **field)
1812{
1813 struct hid_report *report;
1814 int i, j;
1815
1816 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1817 for (i = 0; i < report->maxfield; i++) {
1818 *field = report->field[i];
1819 for (j = 0; j < (*field)->maxusage; j++)
1820 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1821 return j;
1822 }
1823 }
1824 return -1;
1825}
1826
1827struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1828{
1829 struct hid_report *report;
1830 struct hid_field *field;
1831 int i, j;
1832
1833 list_for_each_entry(report,
1834 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1835 list) {
1836 for (i = 0; i < report->maxfield; i++) {
1837 field = report->field[i];
1838 for (j = 0; j < field->maxusage; j++)
1839 if (field->usage[j].type == EV_LED)
1840 return field;
1841 }
1842 }
1843 return NULL;
1844}
1845EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1846
1847unsigned int hidinput_count_leds(struct hid_device *hid)
1848{
1849 struct hid_report *report;
1850 struct hid_field *field;
1851 int i, j;
1852 unsigned int count = 0;
1853
1854 list_for_each_entry(report,
1855 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1856 list) {
1857 for (i = 0; i < report->maxfield; i++) {
1858 field = report->field[i];
1859 for (j = 0; j < field->maxusage; j++)
1860 if (field->usage[j].type == EV_LED &&
1861 field->value[j])
1862 count += 1;
1863 }
1864 }
1865 return count;
1866}
1867EXPORT_SYMBOL_GPL(hidinput_count_leds);
1868
1869static void hidinput_led_worker(struct work_struct *work)
1870{
1871 struct hid_device *hid = container_of(work, struct hid_device,
1872 led_work);
1873 struct hid_field *field;
1874 struct hid_report *report;
1875 int ret;
1876 u32 len;
1877
1878 field = hidinput_get_led_field(hid);
1879 if (!field)
1880 return;
1881
1882 /*
1883 * field->report is accessed unlocked regarding HID core. So there might
1884 * be another incoming SET-LED request from user-space, which changes
1885 * the LED state while we assemble our outgoing buffer. However, this
1886 * doesn't matter as hid_output_report() correctly converts it into a
1887 * boolean value no matter what information is currently set on the LED
1888 * field (even garbage). So the remote device will always get a valid
1889 * request.
1890 * And in case we send a wrong value, a next led worker is spawned
1891 * for every SET-LED request so the following worker will send the
1892 * correct value, guaranteed!
1893 */
1894
1895 report = field->report;
1896
1897 /* use custom SET_REPORT request if possible (asynchronous) */
1898 if (hid->ll_driver->request)
1899 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1900
1901 /* fall back to generic raw-output-report */
1902 len = hid_report_len(report);
1903 u8 *buf __free(kfree) = hid_alloc_report_buf(report, GFP_KERNEL);
1904 if (!buf)
1905 return;
1906
1907 hid_output_report(report, buf);
1908 /* synchronous output report */
1909 ret = hid_hw_output_report(hid, buf, len);
1910 if (ret == -ENOSYS)
1911 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1912 HID_REQ_SET_REPORT);
1913}
1914
1915static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1916 unsigned int code, int value)
1917{
1918 struct hid_device *hid = input_get_drvdata(dev);
1919 struct hid_field *field;
1920 int offset;
1921
1922 if (type == EV_FF)
1923 return input_ff_event(dev, type, code, value);
1924
1925 if (type != EV_LED)
1926 return -1;
1927
1928 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1929 hid_warn(dev, "event field not found\n");
1930 return -1;
1931 }
1932
1933 hid_set_field(field, offset, value);
1934
1935 schedule_work(&hid->led_work);
1936 return 0;
1937}
1938
1939static int hidinput_open(struct input_dev *dev)
1940{
1941 struct hid_device *hid = input_get_drvdata(dev);
1942
1943 return hid_hw_open(hid);
1944}
1945
1946static void hidinput_close(struct input_dev *dev)
1947{
1948 struct hid_device *hid = input_get_drvdata(dev);
1949
1950 hid_hw_close(hid);
1951}
1952
1953static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1954 struct hid_report *report, bool use_logical_max)
1955{
1956 struct hid_usage *usage;
1957 bool update_needed = false;
1958 bool get_report_completed = false;
1959 int i, j;
1960
1961 if (report->maxfield == 0)
1962 return false;
1963
1964 for (i = 0; i < report->maxfield; i++) {
1965 __s32 value = use_logical_max ?
1966 report->field[i]->logical_maximum :
1967 report->field[i]->logical_minimum;
1968
1969 /* There is no good reason for a Resolution
1970 * Multiplier to have a count other than 1.
1971 * Ignore that case.
1972 */
1973 if (report->field[i]->report_count != 1)
1974 continue;
1975
1976 for (j = 0; j < report->field[i]->maxusage; j++) {
1977 usage = &report->field[i]->usage[j];
1978
1979 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1980 continue;
1981
1982 /*
1983 * If we have more than one feature within this
1984 * report we need to fill in the bits from the
1985 * others before we can overwrite the ones for the
1986 * Resolution Multiplier.
1987 *
1988 * But if we're not allowed to read from the device,
1989 * we just bail. Such a device should not exist
1990 * anyway.
1991 */
1992 if (!get_report_completed && report->maxfield > 1) {
1993 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1994 return update_needed;
1995
1996 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1997 hid_hw_wait(hid);
1998 get_report_completed = true;
1999 }
2000
2001 report->field[i]->value[j] = value;
2002 update_needed = true;
2003 }
2004 }
2005
2006 return update_needed;
2007}
2008
2009static void hidinput_change_resolution_multipliers(struct hid_device *hid)
2010{
2011 struct hid_report_enum *rep_enum;
2012 struct hid_report *rep;
2013 int ret;
2014
2015 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2016 list_for_each_entry(rep, &rep_enum->report_list, list) {
2017 bool update_needed = __hidinput_change_resolution_multipliers(hid,
2018 rep, true);
2019
2020 if (update_needed) {
2021 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
2022 if (ret) {
2023 __hidinput_change_resolution_multipliers(hid,
2024 rep, false);
2025 return;
2026 }
2027 }
2028 }
2029
2030 /* refresh our structs */
2031 hid_setup_resolution_multiplier(hid);
2032}
2033
2034static void report_features(struct hid_device *hid)
2035{
2036 struct hid_driver *drv = hid->driver;
2037 struct hid_report_enum *rep_enum;
2038 struct hid_report *rep;
2039 struct hid_usage *usage;
2040 int i, j;
2041
2042 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2043 list_for_each_entry(rep, &rep_enum->report_list, list)
2044 for (i = 0; i < rep->maxfield; i++) {
2045 /* Ignore if report count is out of bounds. */
2046 if (rep->field[i]->report_count < 1)
2047 continue;
2048
2049 for (j = 0; j < rep->field[i]->maxusage; j++) {
2050 usage = &rep->field[i]->usage[j];
2051
2052 /* Verify if Battery Strength feature is available */
2053 if (usage->hid == HID_DC_BATTERYSTRENGTH)
2054 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2055 rep->field[i], false);
2056
2057 if (drv->feature_mapping)
2058 drv->feature_mapping(hid, rep->field[i], usage);
2059 }
2060 }
2061}
2062
2063static struct hid_input *hidinput_allocate(struct hid_device *hid,
2064 unsigned int application)
2065{
2066 struct hid_input *hidinput = kzalloc_obj(*hidinput);
2067 struct input_dev *input_dev = input_allocate_device();
2068 const char *suffix = NULL;
2069 size_t suffix_len, name_len;
2070
2071 if (!hidinput || !input_dev)
2072 goto fail;
2073
2074 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2075 hid->maxapplication > 1) {
2076 switch (application) {
2077 case HID_GD_KEYBOARD:
2078 suffix = "Keyboard";
2079 break;
2080 case HID_GD_KEYPAD:
2081 suffix = "Keypad";
2082 break;
2083 case HID_GD_MOUSE:
2084 suffix = "Mouse";
2085 break;
2086 case HID_DG_PEN:
2087 /*
2088 * yes, there is an issue here:
2089 * DG_PEN -> "Stylus"
2090 * DG_STYLUS -> "Pen"
2091 * But changing this now means users with config snippets
2092 * will have to change it and the test suite will not be happy.
2093 */
2094 suffix = "Stylus";
2095 break;
2096 case HID_DG_STYLUS:
2097 suffix = "Pen";
2098 break;
2099 case HID_DG_TOUCHSCREEN:
2100 suffix = "Touchscreen";
2101 break;
2102 case HID_DG_TOUCHPAD:
2103 suffix = "Touchpad";
2104 break;
2105 case HID_GD_SYSTEM_CONTROL:
2106 suffix = "System Control";
2107 break;
2108 case HID_CP_CONSUMER_CONTROL:
2109 suffix = "Consumer Control";
2110 break;
2111 case HID_GD_WIRELESS_RADIO_CTLS:
2112 suffix = "Wireless Radio Control";
2113 break;
2114 case HID_GD_SYSTEM_MULTIAXIS:
2115 suffix = "System Multi Axis";
2116 break;
2117 default:
2118 break;
2119 }
2120 }
2121
2122 if (suffix) {
2123 name_len = strlen(hid->name);
2124 suffix_len = strlen(suffix);
2125 if ((name_len < suffix_len) ||
2126 strcmp(hid->name + name_len - suffix_len, suffix)) {
2127 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2128 hid->name, suffix);
2129 if (!hidinput->name)
2130 goto fail;
2131 }
2132 }
2133
2134 input_set_drvdata(input_dev, hid);
2135 input_dev->event = hidinput_input_event;
2136 input_dev->open = hidinput_open;
2137 input_dev->close = hidinput_close;
2138 input_dev->setkeycode = hidinput_setkeycode;
2139 input_dev->getkeycode = hidinput_getkeycode;
2140
2141 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2142 input_dev->phys = hid->phys;
2143 input_dev->uniq = hid->uniq;
2144 input_dev->id.bustype = hid->bus;
2145 input_dev->id.vendor = hid->vendor;
2146 input_dev->id.product = hid->product;
2147 input_dev->id.version = hid->version;
2148 input_dev->dev.parent = &hid->dev;
2149
2150 hidinput->input = input_dev;
2151 hidinput->application = application;
2152 list_add_tail(&hidinput->list, &hid->inputs);
2153
2154 INIT_LIST_HEAD(&hidinput->reports);
2155
2156 return hidinput;
2157
2158fail:
2159 kfree(hidinput);
2160 input_free_device(input_dev);
2161 hid_err(hid, "Out of memory during hid input probe\n");
2162 return NULL;
2163}
2164
2165static bool hidinput_has_been_populated(struct hid_input *hidinput)
2166{
2167 int i;
2168 unsigned long r = 0;
2169
2170 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2171 r |= hidinput->input->evbit[i];
2172
2173 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2174 r |= hidinput->input->keybit[i];
2175
2176 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2177 r |= hidinput->input->relbit[i];
2178
2179 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2180 r |= hidinput->input->absbit[i];
2181
2182 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2183 r |= hidinput->input->mscbit[i];
2184
2185 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2186 r |= hidinput->input->ledbit[i];
2187
2188 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2189 r |= hidinput->input->sndbit[i];
2190
2191 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2192 r |= hidinput->input->ffbit[i];
2193
2194 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2195 r |= hidinput->input->swbit[i];
2196
2197 return !!r;
2198}
2199
2200static void hidinput_cleanup_hidinput(struct hid_device *hid,
2201 struct hid_input *hidinput)
2202{
2203 struct hid_report *report;
2204 int i, k;
2205
2206 list_del(&hidinput->list);
2207 input_free_device(hidinput->input);
2208 kfree(hidinput->name);
2209
2210 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2211 if (k == HID_OUTPUT_REPORT &&
2212 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2213 continue;
2214
2215 list_for_each_entry(report, &hid->report_enum[k].report_list,
2216 list) {
2217
2218 for (i = 0; i < report->maxfield; i++)
2219 if (report->field[i]->hidinput == hidinput)
2220 report->field[i]->hidinput = NULL;
2221 }
2222 }
2223
2224 kfree(hidinput);
2225}
2226
2227static struct hid_input *hidinput_match(struct hid_report *report)
2228{
2229 struct hid_device *hid = report->device;
2230 struct hid_input *hidinput;
2231
2232 list_for_each_entry(hidinput, &hid->inputs, list) {
2233 if (hidinput->report &&
2234 hidinput->report->id == report->id)
2235 return hidinput;
2236 }
2237
2238 return NULL;
2239}
2240
2241static struct hid_input *hidinput_match_application(struct hid_report *report)
2242{
2243 struct hid_device *hid = report->device;
2244 struct hid_input *hidinput;
2245
2246 list_for_each_entry(hidinput, &hid->inputs, list) {
2247 if (hidinput->application == report->application)
2248 return hidinput;
2249
2250 /*
2251 * Keep SystemControl and ConsumerControl applications together
2252 * with the main keyboard, if present.
2253 */
2254 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2255 report->application == HID_CP_CONSUMER_CONTROL) &&
2256 hidinput->application == HID_GD_KEYBOARD) {
2257 return hidinput;
2258 }
2259 }
2260
2261 return NULL;
2262}
2263
2264static inline void hidinput_configure_usages(struct hid_input *hidinput,
2265 struct hid_report *report)
2266{
2267 int i, j, k;
2268 int first_field_index = 0;
2269 int slot_collection_index = -1;
2270 int prev_collection_index = -1;
2271 unsigned int slot_idx = 0;
2272 struct hid_field *field;
2273
2274 /*
2275 * First tag all the fields that are part of a slot,
2276 * a slot needs to have one Contact ID in the collection
2277 */
2278 for (i = 0; i < report->maxfield; i++) {
2279 field = report->field[i];
2280
2281 /* ignore fields without usage */
2282 if (field->maxusage < 1)
2283 continue;
2284
2285 /*
2286 * janitoring when collection_index changes
2287 */
2288 if (prev_collection_index != field->usage->collection_index) {
2289 prev_collection_index = field->usage->collection_index;
2290 first_field_index = i;
2291 }
2292
2293 /*
2294 * if we already found a Contact ID in the collection,
2295 * tag and continue to the next.
2296 */
2297 if (slot_collection_index == field->usage->collection_index) {
2298 field->slot_idx = slot_idx;
2299 continue;
2300 }
2301
2302 /* check if the current field has Contact ID */
2303 for (j = 0; j < field->maxusage; j++) {
2304 if (field->usage[j].hid == HID_DG_CONTACTID) {
2305 slot_collection_index = field->usage->collection_index;
2306 slot_idx++;
2307
2308 /*
2309 * mark all previous fields and this one in the
2310 * current collection to be slotted.
2311 */
2312 for (k = first_field_index; k <= i; k++)
2313 report->field[k]->slot_idx = slot_idx;
2314 break;
2315 }
2316 }
2317 }
2318
2319 for (i = 0; i < report->maxfield; i++)
2320 for (j = 0; j < report->field[i]->maxusage; j++)
2321 hidinput_configure_usage(hidinput, report->field[i],
2322 report->field[i]->usage + j,
2323 j);
2324}
2325
2326/*
2327 * Register the input device; print a message.
2328 * Configure the input layer interface
2329 * Read all reports and initialize the absolute field values.
2330 */
2331
2332static bool hid_has_ff_input(struct hid_device *hdev)
2333{
2334 struct hid_input *hidinput;
2335
2336 list_for_each_entry(hidinput, &hdev->inputs, list) {
2337 if (test_bit(EV_FF, hidinput->input->evbit))
2338 return true;
2339 }
2340
2341 return false;
2342}
2343
2344int hidinput_connect(struct hid_device *hid, unsigned int connect_mask)
2345{
2346 struct hid_driver *drv = hid->driver;
2347 struct hid_report *report;
2348 struct hid_input *next, *hidinput = NULL;
2349 unsigned int application;
2350 int i, k;
2351
2352 INIT_LIST_HEAD(&hid->inputs);
2353 INIT_WORK(&hid->led_work, hidinput_led_worker);
2354
2355 hid->status &= ~HID_STAT_DUP_DETECTED;
2356
2357 if (!(connect_mask & HID_CONNECT_HIDINPUT_FORCE)) {
2358 for (i = 0; i < hid->maxcollection; i++) {
2359 struct hid_collection *col = &hid->collection[i];
2360 if (col->type == HID_COLLECTION_APPLICATION ||
2361 col->type == HID_COLLECTION_PHYSICAL)
2362 if (IS_INPUT_APPLICATION(col->usage))
2363 break;
2364 }
2365
2366 if (i == hid->maxcollection)
2367 return -1;
2368 }
2369
2370 report_features(hid);
2371
2372 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2373 if (k == HID_OUTPUT_REPORT &&
2374 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2375 continue;
2376
2377 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2378
2379 if (!report->maxfield)
2380 continue;
2381
2382 application = report->application;
2383
2384 /*
2385 * Find the previous hidinput report attached
2386 * to this report id.
2387 */
2388 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2389 hidinput = hidinput_match(report);
2390 else if (hid->maxapplication > 1 &&
2391 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2392 hidinput = hidinput_match_application(report);
2393
2394 if (!hidinput) {
2395 hidinput = hidinput_allocate(hid, application);
2396 if (!hidinput)
2397 goto out_unwind;
2398 }
2399
2400 hidinput_configure_usages(hidinput, report);
2401
2402 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2403 hidinput->report = report;
2404
2405 list_add_tail(&report->hidinput_list,
2406 &hidinput->reports);
2407 }
2408 }
2409
2410 hidinput_change_resolution_multipliers(hid);
2411
2412 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2413 if (drv->input_configured &&
2414 drv->input_configured(hid, hidinput))
2415 goto out_unwind;
2416
2417 if (!hidinput_has_been_populated(hidinput)) {
2418 /* no need to register an input device not populated */
2419 hidinput_cleanup_hidinput(hid, hidinput);
2420 continue;
2421 }
2422
2423 if (list_is_first(&hidinput->list, &hid->inputs) &&
2424 (connect_mask & HID_CONNECT_FF) && hid->ff_init &&
2425 !hid_has_ff_input(hid))
2426 hid->ff_init(hid);
2427
2428 if (input_register_device(hidinput->input))
2429 goto out_unwind;
2430 hidinput->registered = true;
2431 }
2432
2433 if (list_empty(&hid->inputs)) {
2434 hid_dbg(hid, "No inputs registered, leaving\n");
2435 goto out_unwind;
2436 }
2437
2438 if (hid->status & HID_STAT_DUP_DETECTED)
2439 hid_dbg(hid,
2440 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2441
2442 return 0;
2443
2444out_unwind:
2445 /* unwind the ones we already registered */
2446 hidinput_disconnect(hid);
2447
2448 return -1;
2449}
2450EXPORT_SYMBOL_GPL(hidinput_connect);
2451
2452void hidinput_disconnect(struct hid_device *hid)
2453{
2454 struct hid_input *hidinput, *next;
2455
2456 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2457 list_del(&hidinput->list);
2458 if (hidinput->registered)
2459 input_unregister_device(hidinput->input);
2460 else
2461 input_free_device(hidinput->input);
2462 kfree(hidinput->name);
2463 kfree(hidinput);
2464 }
2465
2466 /* led_work is spawned by input_dev callbacks, but doesn't access the
2467 * parent input_dev at all. Once all input devices are removed, we
2468 * know that led_work will never get restarted, so we can cancel it
2469 * synchronously and are safe. */
2470 cancel_work_sync(&hid->led_work);
2471}
2472EXPORT_SYMBOL_GPL(hidinput_disconnect);
2473
2474void hidinput_reset_resume(struct hid_device *hid)
2475{
2476 /* renegotiate host-device shared state after reset */
2477 hidinput_change_resolution_multipliers(hid);
2478}
2479EXPORT_SYMBOL_GPL(hidinput_reset_resume);
2480
2481#ifdef CONFIG_HID_KUNIT_TEST
2482#include "hid-input-test.c"
2483#endif