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 <vojtech@ucw.cz>, 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
27 static 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
46 static 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
51 struct 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 */
78 static 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
match_scancode(struct hid_usage * usage,unsigned int cur_idx,unsigned int scancode)107 static 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
match_keycode(struct hid_usage * usage,unsigned int cur_idx,unsigned int keycode)113 static 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
match_index(struct hid_usage * usage,unsigned int cur_idx,unsigned int idx)122 static bool match_index(struct hid_usage *usage,
123 unsigned int cur_idx, unsigned int idx)
124 {
125 return cur_idx == idx;
126 }
127
128 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
129 unsigned int cur_idx, unsigned int val);
130
hidinput_find_key(struct hid_device * hid,hid_usage_cmp_t match,unsigned int value,unsigned int * usage_idx)131 static 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
hidinput_locate_usage(struct hid_device * hid,const struct input_keymap_entry * ke,unsigned int * index)160 static 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
hidinput_getkeycode(struct input_dev * dev,struct input_keymap_entry * ke)177 static 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
hidinput_setkeycode(struct input_dev * dev,const struct input_keymap_entry * ke,unsigned int * old_keycode)198 static 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 */
hidinput_calc_abs_res(const struct hid_field * field,__u16 code)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 }
341 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
342
343 #ifdef CONFIG_HID_BATTERY_STRENGTH
344 static 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
358 static const struct hid_device_id hid_battery_quirks[] = {
359 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
360 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
361 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
362 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
363 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
364 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
365 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
366 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
367 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
368 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
369 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
370 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
371 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
372 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
373 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
374 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
375 USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
376 HID_BATTERY_QUIRK_IGNORE },
377 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
378 USB_DEVICE_ID_ELECOM_BM084),
379 HID_BATTERY_QUIRK_IGNORE },
380 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
381 USB_DEVICE_ID_SYMBOL_SCANNER_3),
382 HID_BATTERY_QUIRK_IGNORE },
383 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
384 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
385 HID_BATTERY_QUIRK_IGNORE },
386 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
387 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
388 HID_BATTERY_QUIRK_IGNORE },
389 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
390 HID_BATTERY_QUIRK_IGNORE },
391 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
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 /*
402 * Elan I2C-HID touchscreens seem to all report a non present battery,
403 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C-HID devices.
404 */
405 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
406 {}
407 };
408
find_battery_quirk(struct hid_device * hdev)409 static unsigned find_battery_quirk(struct hid_device *hdev)
410 {
411 unsigned quirks = 0;
412 const struct hid_device_id *match;
413
414 match = hid_match_id(hdev, hid_battery_quirks);
415 if (match != NULL)
416 quirks = match->driver_data;
417
418 return quirks;
419 }
420
hidinput_scale_battery_capacity(struct hid_device * dev,int value)421 static int hidinput_scale_battery_capacity(struct hid_device *dev,
422 int value)
423 {
424 if (dev->battery_min < dev->battery_max &&
425 value >= dev->battery_min && value <= dev->battery_max)
426 value = ((value - dev->battery_min) * 100) /
427 (dev->battery_max - dev->battery_min);
428
429 return value;
430 }
431
hidinput_query_battery_capacity(struct hid_device * dev)432 static int hidinput_query_battery_capacity(struct hid_device *dev)
433 {
434 u8 *buf;
435 int ret;
436
437 buf = kmalloc(4, GFP_KERNEL);
438 if (!buf)
439 return -ENOMEM;
440
441 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
442 dev->battery_report_type, HID_REQ_GET_REPORT);
443 if (ret < 2) {
444 kfree(buf);
445 return -ENODATA;
446 }
447
448 ret = hidinput_scale_battery_capacity(dev, buf[1]);
449 kfree(buf);
450 return ret;
451 }
452
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)453 static int hidinput_get_battery_property(struct power_supply *psy,
454 enum power_supply_property prop,
455 union power_supply_propval *val)
456 {
457 struct hid_device *dev = power_supply_get_drvdata(psy);
458 int value;
459 int ret = 0;
460
461 switch (prop) {
462 case POWER_SUPPLY_PROP_PRESENT:
463 case POWER_SUPPLY_PROP_ONLINE:
464 val->intval = 1;
465 break;
466
467 case POWER_SUPPLY_PROP_CAPACITY:
468 if (dev->battery_status != HID_BATTERY_REPORTED &&
469 !dev->battery_avoid_query) {
470 value = hidinput_query_battery_capacity(dev);
471 if (value < 0)
472 return value;
473 } else {
474 value = dev->battery_capacity;
475 }
476
477 val->intval = value;
478 break;
479
480 case POWER_SUPPLY_PROP_MODEL_NAME:
481 val->strval = dev->name;
482 break;
483
484 case POWER_SUPPLY_PROP_STATUS:
485 if (dev->battery_status != HID_BATTERY_REPORTED &&
486 !dev->battery_avoid_query) {
487 value = hidinput_query_battery_capacity(dev);
488 if (value < 0)
489 return value;
490
491 dev->battery_capacity = value;
492 dev->battery_status = HID_BATTERY_QUERIED;
493 }
494
495 if (dev->battery_status == HID_BATTERY_UNKNOWN)
496 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
497 else
498 val->intval = dev->battery_charge_status;
499 break;
500
501 case POWER_SUPPLY_PROP_SCOPE:
502 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
503 break;
504
505 default:
506 ret = -EINVAL;
507 break;
508 }
509
510 return ret;
511 }
512
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)513 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
514 struct hid_field *field, bool is_percentage)
515 {
516 struct power_supply_desc *psy_desc;
517 struct power_supply_config psy_cfg = { .drv_data = dev, };
518 unsigned quirks;
519 s32 min, max;
520 int error;
521
522 if (dev->battery)
523 return 0; /* already initialized? */
524
525 quirks = find_battery_quirk(dev);
526
527 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
528 dev->bus, dev->vendor, dev->product, dev->version, quirks);
529
530 if (quirks & HID_BATTERY_QUIRK_IGNORE)
531 return 0;
532
533 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
534 if (!psy_desc)
535 return -ENOMEM;
536
537 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
538 strlen(dev->uniq) ?
539 dev->uniq : dev_name(&dev->dev));
540 if (!psy_desc->name) {
541 error = -ENOMEM;
542 goto err_free_mem;
543 }
544
545 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
546 psy_desc->properties = hidinput_battery_props;
547 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
548 psy_desc->use_for_apm = 0;
549 psy_desc->get_property = hidinput_get_battery_property;
550
551 min = field->logical_minimum;
552 max = field->logical_maximum;
553
554 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
555 min = 0;
556 max = 100;
557 }
558
559 if (quirks & HID_BATTERY_QUIRK_FEATURE)
560 report_type = HID_FEATURE_REPORT;
561
562 dev->battery_min = min;
563 dev->battery_max = max;
564 dev->battery_report_type = report_type;
565 dev->battery_report_id = field->report->id;
566 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
567
568 /*
569 * Stylus is normally not connected to the device and thus we
570 * can't query the device and get meaningful battery strength.
571 * We have to wait for the device to report it on its own.
572 */
573 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
574 field->physical == HID_DG_STYLUS;
575
576 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
577 dev->battery_avoid_query = true;
578
579 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
580 if (IS_ERR(dev->battery)) {
581 error = PTR_ERR(dev->battery);
582 hid_warn(dev, "can't register power supply: %d\n", error);
583 goto err_free_name;
584 }
585
586 power_supply_powers(dev->battery, &dev->dev);
587 return 0;
588
589 err_free_name:
590 kfree(psy_desc->name);
591 err_free_mem:
592 kfree(psy_desc);
593 dev->battery = NULL;
594 return error;
595 }
596
hidinput_cleanup_battery(struct hid_device * dev)597 static void hidinput_cleanup_battery(struct hid_device *dev)
598 {
599 const struct power_supply_desc *psy_desc;
600
601 if (!dev->battery)
602 return;
603
604 psy_desc = dev->battery->desc;
605 power_supply_unregister(dev->battery);
606 kfree(psy_desc->name);
607 kfree(psy_desc);
608 dev->battery = NULL;
609 }
610
hidinput_update_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)611 static bool hidinput_update_battery_charge_status(struct hid_device *dev,
612 unsigned int usage, int value)
613 {
614 switch (usage) {
615 case HID_BAT_CHARGING:
616 dev->battery_charge_status = value ?
617 POWER_SUPPLY_STATUS_CHARGING :
618 POWER_SUPPLY_STATUS_DISCHARGING;
619 return true;
620 }
621
622 return false;
623 }
624
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)625 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
626 int value)
627 {
628 int capacity;
629
630 if (!dev->battery)
631 return;
632
633 if (hidinput_update_battery_charge_status(dev, usage, value)) {
634 power_supply_changed(dev->battery);
635 return;
636 }
637
638 if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
639 return;
640
641 if (value < dev->battery_min || value > dev->battery_max)
642 return;
643
644 capacity = hidinput_scale_battery_capacity(dev, value);
645
646 if (dev->battery_status != HID_BATTERY_REPORTED ||
647 capacity != dev->battery_capacity ||
648 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
649 dev->battery_capacity = capacity;
650 dev->battery_status = HID_BATTERY_REPORTED;
651 dev->battery_ratelimit_time =
652 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
653 power_supply_changed(dev->battery);
654 }
655 }
656 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)657 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
658 struct hid_field *field, bool is_percentage)
659 {
660 return 0;
661 }
662
hidinput_cleanup_battery(struct hid_device * dev)663 static void hidinput_cleanup_battery(struct hid_device *dev)
664 {
665 }
666
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)667 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
668 int value)
669 {
670 }
671 #endif /* CONFIG_HID_BATTERY_STRENGTH */
672
hidinput_field_in_collection(struct hid_device * device,struct hid_field * field,unsigned int type,unsigned int usage)673 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
674 unsigned int type, unsigned int usage)
675 {
676 struct hid_collection *collection;
677
678 collection = &device->collection[field->usage->collection_index];
679
680 return collection->type == type && collection->usage == usage;
681 }
682
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage,unsigned int usage_index)683 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
684 struct hid_usage *usage, unsigned int usage_index)
685 {
686 struct input_dev *input = hidinput->input;
687 struct hid_device *device = input_get_drvdata(input);
688 const struct usage_priority *usage_priority = NULL;
689 int max = 0, code;
690 unsigned int i = 0;
691 unsigned long *bit = NULL;
692
693 field->hidinput = hidinput;
694
695 if (field->flags & HID_MAIN_ITEM_CONSTANT)
696 goto ignore;
697
698 /* Ignore if report count is out of bounds. */
699 if (field->report_count < 1)
700 goto ignore;
701
702 /* only LED and HAPTIC usages are supported in output fields */
703 if (field->report_type == HID_OUTPUT_REPORT &&
704 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
705 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
706 goto ignore;
707 }
708
709 /* assign a priority based on the static list declared here */
710 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
711 if (usage->hid == hidinput_usages_priorities[i].usage) {
712 usage_priority = &hidinput_usages_priorities[i];
713
714 field->usages_priorities[usage_index] =
715 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
716 break;
717 }
718 }
719
720 /*
721 * For slotted devices, we need to also add the slot index
722 * in the priority.
723 */
724 if (usage_priority && usage_priority->global)
725 field->usages_priorities[usage_index] |=
726 usage_priority->slot_overwrite;
727 else
728 field->usages_priorities[usage_index] |=
729 (0xff - field->slot_idx) << 16;
730
731 if (device->driver->input_mapping) {
732 int ret = device->driver->input_mapping(device, hidinput, field,
733 usage, &bit, &max);
734 if (ret > 0)
735 goto mapped;
736 if (ret < 0)
737 goto ignore;
738 }
739
740 switch (usage->hid & HID_USAGE_PAGE) {
741 case HID_UP_UNDEFINED:
742 goto ignore;
743
744 case HID_UP_KEYBOARD:
745 set_bit(EV_REP, input->evbit);
746
747 if ((usage->hid & HID_USAGE) < 256) {
748 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
749 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
750 } else
751 map_key(KEY_UNKNOWN);
752
753 break;
754
755 case HID_UP_BUTTON:
756 code = ((usage->hid - 1) & HID_USAGE);
757
758 switch (field->application) {
759 case HID_GD_MOUSE:
760 case HID_GD_POINTER: code += BTN_MOUSE; break;
761 case HID_GD_JOYSTICK:
762 if (code <= 0xf)
763 code += BTN_JOYSTICK;
764 else
765 code += BTN_TRIGGER_HAPPY - 0x10;
766 break;
767 case HID_GD_GAMEPAD:
768 if (code <= 0xf)
769 code += BTN_GAMEPAD;
770 else
771 code += BTN_TRIGGER_HAPPY - 0x10;
772 break;
773 case HID_CP_CONSUMER_CONTROL:
774 if (hidinput_field_in_collection(device, field,
775 HID_COLLECTION_NAMED_ARRAY,
776 HID_CP_PROGRAMMABLEBUTTONS)) {
777 if (code <= 0x1d)
778 code += KEY_MACRO1;
779 else
780 code += BTN_TRIGGER_HAPPY - 0x1e;
781 break;
782 }
783 fallthrough;
784 default:
785 switch (field->physical) {
786 case HID_GD_MOUSE:
787 case HID_GD_POINTER: code += BTN_MOUSE; break;
788 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
789 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
790 default: code += BTN_MISC;
791 }
792 }
793
794 map_key(code);
795 break;
796
797 case HID_UP_SIMULATION:
798 switch (usage->hid & 0xffff) {
799 case 0xba: map_abs(ABS_RUDDER); break;
800 case 0xbb: map_abs(ABS_THROTTLE); break;
801 case 0xc4: map_abs(ABS_GAS); break;
802 case 0xc5: map_abs(ABS_BRAKE); break;
803 case 0xc8: map_abs(ABS_WHEEL); break;
804 default: goto ignore;
805 }
806 break;
807
808 case HID_UP_GENDESK:
809 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
810 switch (usage->hid & 0xf) {
811 case 0x1: map_key_clear(KEY_POWER); break;
812 case 0x2: map_key_clear(KEY_SLEEP); break;
813 case 0x3: map_key_clear(KEY_WAKEUP); break;
814 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
815 case 0x5: map_key_clear(KEY_MENU); break;
816 case 0x6: map_key_clear(KEY_PROG1); break;
817 case 0x7: map_key_clear(KEY_HELP); break;
818 case 0x8: map_key_clear(KEY_EXIT); break;
819 case 0x9: map_key_clear(KEY_SELECT); break;
820 case 0xa: map_key_clear(KEY_RIGHT); break;
821 case 0xb: map_key_clear(KEY_LEFT); break;
822 case 0xc: map_key_clear(KEY_UP); break;
823 case 0xd: map_key_clear(KEY_DOWN); break;
824 case 0xe: map_key_clear(KEY_POWER2); break;
825 case 0xf: map_key_clear(KEY_RESTART); break;
826 default: goto unknown;
827 }
828 break;
829 }
830
831 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
832 switch (usage->hid) {
833 case HID_GD_UP: usage->hat_dir = 1; break;
834 case HID_GD_DOWN: usage->hat_dir = 5; break;
835 case HID_GD_RIGHT: usage->hat_dir = 3; break;
836 case HID_GD_LEFT: usage->hat_dir = 7; break;
837 case HID_GD_DO_NOT_DISTURB:
838 map_key_clear(KEY_DO_NOT_DISTURB); break;
839 default: goto unknown;
840 }
841
842 if (usage->hid <= HID_GD_LEFT) {
843 if (field->dpad) {
844 map_abs(field->dpad);
845 goto ignore;
846 }
847 map_abs(ABS_HAT0X);
848 }
849 break;
850 }
851
852 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
853 switch (usage->hid & 0xf) {
854 case 0x9: map_key_clear(KEY_MICMUTE); break;
855 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
856 default: goto ignore;
857 }
858 break;
859 }
860
861 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
862 switch (usage->hid & 0xf) {
863 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
864 default: goto ignore;
865 }
866 break;
867 }
868
869 /*
870 * Some lazy vendors declare 255 usages for System Control,
871 * leading to the creation of ABS_X|Y axis and too many others.
872 * It wouldn't be a problem if joydev doesn't consider the
873 * device as a joystick then.
874 */
875 if (field->application == HID_GD_SYSTEM_CONTROL)
876 goto ignore;
877
878 switch (usage->hid) {
879 /* These usage IDs map directly to the usage codes. */
880 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
881 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
882 if (field->flags & HID_MAIN_ITEM_RELATIVE)
883 map_rel(usage->hid & 0xf);
884 else
885 map_abs_clear(usage->hid & 0xf);
886 break;
887
888 case HID_GD_WHEEL:
889 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
890 set_bit(REL_WHEEL, input->relbit);
891 map_rel(REL_WHEEL_HI_RES);
892 } else {
893 map_abs(usage->hid & 0xf);
894 }
895 break;
896 case HID_GD_SLIDER: case HID_GD_DIAL:
897 if (field->flags & HID_MAIN_ITEM_RELATIVE)
898 map_rel(usage->hid & 0xf);
899 else
900 map_abs(usage->hid & 0xf);
901 break;
902
903 case HID_GD_HATSWITCH:
904 usage->hat_min = field->logical_minimum;
905 usage->hat_max = field->logical_maximum;
906 map_abs(ABS_HAT0X);
907 break;
908
909 case HID_GD_START: map_key_clear(BTN_START); break;
910 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
911
912 case HID_GD_RFKILL_BTN:
913 /* MS wireless radio ctl extension, also check CA */
914 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
915 map_key_clear(KEY_RFKILL);
916 /* We need to simulate the btn release */
917 field->flags |= HID_MAIN_ITEM_RELATIVE;
918 break;
919 }
920 goto unknown;
921
922 default: goto unknown;
923 }
924
925 break;
926
927 case HID_UP_LED:
928 switch (usage->hid & 0xffff) { /* HID-Value: */
929 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
930 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
931 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
932 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
933 case 0x05: map_led (LED_KANA); break; /* "Kana" */
934 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
935 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
936 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
937 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
938 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
939 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
940
941 default: goto ignore;
942 }
943 break;
944
945 case HID_UP_DIGITIZER:
946 if ((field->application & 0xff) == 0x01) /* Digitizer */
947 __set_bit(INPUT_PROP_POINTER, input->propbit);
948 else if ((field->application & 0xff) == 0x02) /* Pen */
949 __set_bit(INPUT_PROP_DIRECT, input->propbit);
950
951 switch (usage->hid & 0xff) {
952 case 0x00: /* Undefined */
953 goto ignore;
954
955 case 0x30: /* TipPressure */
956 if (!test_bit(BTN_TOUCH, input->keybit)) {
957 device->quirks |= HID_QUIRK_NOTOUCH;
958 set_bit(EV_KEY, input->evbit);
959 set_bit(BTN_TOUCH, input->keybit);
960 }
961 map_abs_clear(ABS_PRESSURE);
962 break;
963
964 case 0x32: /* InRange */
965 switch (field->physical) {
966 case HID_DG_PUCK:
967 map_key(BTN_TOOL_MOUSE);
968 break;
969 case HID_DG_FINGER:
970 map_key(BTN_TOOL_FINGER);
971 break;
972 default:
973 /*
974 * If the physical is not given,
975 * rely on the application.
976 */
977 if (!field->physical) {
978 switch (field->application) {
979 case HID_DG_TOUCHSCREEN:
980 case HID_DG_TOUCHPAD:
981 map_key_clear(BTN_TOOL_FINGER);
982 break;
983 default:
984 map_key_clear(BTN_TOOL_PEN);
985 }
986 } else {
987 map_key(BTN_TOOL_PEN);
988 }
989 break;
990 }
991 break;
992
993 case 0x3b: /* Battery Strength */
994 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
995 usage->type = EV_PWR;
996 return;
997
998 case 0x3c: /* Invert */
999 device->quirks &= ~HID_QUIRK_NOINVERT;
1000 map_key_clear(BTN_TOOL_RUBBER);
1001 break;
1002
1003 case 0x3d: /* X Tilt */
1004 map_abs_clear(ABS_TILT_X);
1005 break;
1006
1007 case 0x3e: /* Y Tilt */
1008 map_abs_clear(ABS_TILT_Y);
1009 break;
1010
1011 case 0x33: /* Touch */
1012 case 0x42: /* TipSwitch */
1013 case 0x43: /* TipSwitch2 */
1014 device->quirks &= ~HID_QUIRK_NOTOUCH;
1015 map_key_clear(BTN_TOUCH);
1016 break;
1017
1018 case 0x44: /* BarrelSwitch */
1019 map_key_clear(BTN_STYLUS);
1020 break;
1021
1022 case 0x45: /* ERASER */
1023 /*
1024 * This event is reported when eraser tip touches the surface.
1025 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1026 * by Invert if tool reports proximity or by Eraser directly.
1027 */
1028 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1029 device->quirks |= HID_QUIRK_NOINVERT;
1030 set_bit(BTN_TOOL_RUBBER, input->keybit);
1031 }
1032 map_key_clear(BTN_TOUCH);
1033 break;
1034
1035 case 0x46: /* TabletPick */
1036 case 0x5a: /* SecondaryBarrelSwitch */
1037 map_key_clear(BTN_STYLUS2);
1038 break;
1039
1040 case 0x5b: /* TransducerSerialNumber */
1041 case 0x6e: /* TransducerSerialNumber2 */
1042 map_msc(MSC_SERIAL);
1043 break;
1044
1045 default: goto unknown;
1046 }
1047 break;
1048
1049 case HID_UP_TELEPHONY:
1050 switch (usage->hid & HID_USAGE) {
1051 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1052 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1053 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1054 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1055 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1056 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1057 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1058 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1059 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1060 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1061 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1062 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1063 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1064 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1065 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1066 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1067 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1068 default: goto ignore;
1069 }
1070 break;
1071
1072 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1073 switch (usage->hid & HID_USAGE) {
1074 case 0x000: goto ignore;
1075 case 0x030: map_key_clear(KEY_POWER); break;
1076 case 0x031: map_key_clear(KEY_RESTART); break;
1077 case 0x032: map_key_clear(KEY_SLEEP); break;
1078 case 0x034: map_key_clear(KEY_SLEEP); break;
1079 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1080 case 0x036: map_key_clear(BTN_MISC); break;
1081
1082 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1083 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1084 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1085 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1086 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1087 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1088 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1089 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1090 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1091
1092 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1093 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1094 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1095 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1096 case 0x069: map_key_clear(KEY_RED); break;
1097 case 0x06a: map_key_clear(KEY_GREEN); break;
1098 case 0x06b: map_key_clear(KEY_BLUE); break;
1099 case 0x06c: map_key_clear(KEY_YELLOW); break;
1100 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1101
1102 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1103 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1104 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1105 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1106 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1107 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1108
1109 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1110 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1111 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1112
1113 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1114 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1115 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1116
1117 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1118 case 0x083: map_key_clear(KEY_LAST); break;
1119 case 0x084: map_key_clear(KEY_ENTER); break;
1120 case 0x088: map_key_clear(KEY_PC); break;
1121 case 0x089: map_key_clear(KEY_TV); break;
1122 case 0x08a: map_key_clear(KEY_WWW); break;
1123 case 0x08b: map_key_clear(KEY_DVD); break;
1124 case 0x08c: map_key_clear(KEY_PHONE); break;
1125 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1126 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1127 case 0x08f: map_key_clear(KEY_GAMES); break;
1128 case 0x090: map_key_clear(KEY_MEMO); break;
1129 case 0x091: map_key_clear(KEY_CD); break;
1130 case 0x092: map_key_clear(KEY_VCR); break;
1131 case 0x093: map_key_clear(KEY_TUNER); break;
1132 case 0x094: map_key_clear(KEY_EXIT); break;
1133 case 0x095: map_key_clear(KEY_HELP); break;
1134 case 0x096: map_key_clear(KEY_TAPE); break;
1135 case 0x097: map_key_clear(KEY_TV2); break;
1136 case 0x098: map_key_clear(KEY_SAT); break;
1137 case 0x09a: map_key_clear(KEY_PVR); break;
1138
1139 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1140 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1141 case 0x0a0: map_key_clear(KEY_VCR2); break;
1142
1143 case 0x0b0: map_key_clear(KEY_PLAY); break;
1144 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1145 case 0x0b2: map_key_clear(KEY_RECORD); break;
1146 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1147 case 0x0b4: map_key_clear(KEY_REWIND); break;
1148 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1149 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1150 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1151 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1152 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1153 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1154 case 0x0bf: map_key_clear(KEY_SLOW); break;
1155
1156 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1157 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1158
1159 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1160 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1161
1162 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1163 case 0x0e2: map_key_clear(KEY_MUTE); break;
1164 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1165 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1166 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1167 case 0x0f5: map_key_clear(KEY_SLOW); break;
1168
1169 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1170 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1171 case 0x183: map_key_clear(KEY_CONFIG); break;
1172 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1173 case 0x185: map_key_clear(KEY_EDITOR); break;
1174 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1175 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1176 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1177 case 0x189: map_key_clear(KEY_DATABASE); break;
1178 case 0x18a: map_key_clear(KEY_MAIL); break;
1179 case 0x18b: map_key_clear(KEY_NEWS); break;
1180 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1181 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1182 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1183 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1184 case 0x190: map_key_clear(KEY_JOURNAL); break;
1185 case 0x191: map_key_clear(KEY_FINANCE); break;
1186 case 0x192: map_key_clear(KEY_CALC); break;
1187 case 0x193: map_key_clear(KEY_PLAYER); break;
1188 case 0x194: map_key_clear(KEY_FILE); break;
1189 case 0x196: map_key_clear(KEY_WWW); break;
1190 case 0x199: map_key_clear(KEY_CHAT); break;
1191 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1192 case 0x19e: map_key_clear(KEY_COFFEE); break;
1193 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1194 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1195 case 0x1a3: map_key_clear(KEY_NEXT); break;
1196 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1197 case 0x1a6: map_key_clear(KEY_HELP); break;
1198 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1199 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1200 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1201 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1202 case 0x1b4: map_key_clear(KEY_FILE); break;
1203 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1204 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1205 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1206 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1207 case 0x1bd: map_key_clear(KEY_INFO); break;
1208 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1209 case 0x201: map_key_clear(KEY_NEW); break;
1210 case 0x202: map_key_clear(KEY_OPEN); break;
1211 case 0x203: map_key_clear(KEY_CLOSE); break;
1212 case 0x204: map_key_clear(KEY_EXIT); break;
1213 case 0x207: map_key_clear(KEY_SAVE); break;
1214 case 0x208: map_key_clear(KEY_PRINT); break;
1215 case 0x209: map_key_clear(KEY_PROPS); break;
1216 case 0x21a: map_key_clear(KEY_UNDO); break;
1217 case 0x21b: map_key_clear(KEY_COPY); break;
1218 case 0x21c: map_key_clear(KEY_CUT); break;
1219 case 0x21d: map_key_clear(KEY_PASTE); break;
1220 case 0x21f: map_key_clear(KEY_FIND); break;
1221 case 0x221: map_key_clear(KEY_SEARCH); break;
1222 case 0x222: map_key_clear(KEY_GOTO); break;
1223 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1224 case 0x224: map_key_clear(KEY_BACK); break;
1225 case 0x225: map_key_clear(KEY_FORWARD); break;
1226 case 0x226: map_key_clear(KEY_STOP); break;
1227 case 0x227: map_key_clear(KEY_REFRESH); break;
1228 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1229 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1230 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1231 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1232 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1233 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1234 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1235 case 0x238: /* AC Pan */
1236 set_bit(REL_HWHEEL, input->relbit);
1237 map_rel(REL_HWHEEL_HI_RES);
1238 break;
1239 case 0x23d: map_key_clear(KEY_EDIT); break;
1240 case 0x25f: map_key_clear(KEY_CANCEL); break;
1241 case 0x269: map_key_clear(KEY_INSERT); break;
1242 case 0x26a: map_key_clear(KEY_DELETE); break;
1243 case 0x279: map_key_clear(KEY_REDO); break;
1244
1245 case 0x289: map_key_clear(KEY_REPLY); break;
1246 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1247 case 0x28c: map_key_clear(KEY_SEND); break;
1248
1249 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1250
1251 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1252
1253 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1254 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1255 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1256 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1257 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1258 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1259
1260 case 0x29f: map_key_clear(KEY_SCALE); break;
1261
1262 default: map_key_clear(KEY_UNKNOWN);
1263 }
1264 break;
1265
1266 case HID_UP_GENDEVCTRLS:
1267 switch (usage->hid) {
1268 case HID_DC_BATTERYSTRENGTH:
1269 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1270 usage->type = EV_PWR;
1271 return;
1272 }
1273 goto unknown;
1274
1275 case HID_UP_BATTERY:
1276 switch (usage->hid) {
1277 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1278 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1279 usage->type = EV_PWR;
1280 return;
1281 case HID_BAT_CHARGING:
1282 usage->type = EV_PWR;
1283 return;
1284 }
1285 goto unknown;
1286 case HID_UP_CAMERA:
1287 switch (usage->hid & HID_USAGE) {
1288 case 0x020:
1289 map_key_clear(KEY_CAMERA_FOCUS); break;
1290 case 0x021:
1291 map_key_clear(KEY_CAMERA); break;
1292 default:
1293 goto ignore;
1294 }
1295 break;
1296
1297 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1298 set_bit(EV_REP, input->evbit);
1299 switch (usage->hid & HID_USAGE) {
1300 case 0x021: map_key_clear(KEY_PRINT); break;
1301 case 0x070: map_key_clear(KEY_HP); break;
1302 case 0x071: map_key_clear(KEY_CAMERA); break;
1303 case 0x072: map_key_clear(KEY_SOUND); break;
1304 case 0x073: map_key_clear(KEY_QUESTION); break;
1305 case 0x080: map_key_clear(KEY_EMAIL); break;
1306 case 0x081: map_key_clear(KEY_CHAT); break;
1307 case 0x082: map_key_clear(KEY_SEARCH); break;
1308 case 0x083: map_key_clear(KEY_CONNECT); break;
1309 case 0x084: map_key_clear(KEY_FINANCE); break;
1310 case 0x085: map_key_clear(KEY_SPORT); break;
1311 case 0x086: map_key_clear(KEY_SHOP); break;
1312 default: goto ignore;
1313 }
1314 break;
1315
1316 case HID_UP_HPVENDOR2:
1317 set_bit(EV_REP, input->evbit);
1318 switch (usage->hid & HID_USAGE) {
1319 case 0x001: map_key_clear(KEY_MICMUTE); break;
1320 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1321 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1322 default: goto ignore;
1323 }
1324 break;
1325
1326 case HID_UP_MSVENDOR:
1327 goto ignore;
1328
1329 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1330 set_bit(EV_REP, input->evbit);
1331 goto ignore;
1332
1333 case HID_UP_LOGIVENDOR:
1334 /* intentional fallback */
1335 case HID_UP_LOGIVENDOR2:
1336 /* intentional fallback */
1337 case HID_UP_LOGIVENDOR3:
1338 goto ignore;
1339
1340 case HID_UP_PID:
1341 switch (usage->hid & HID_USAGE) {
1342 case 0xa4: map_key_clear(BTN_DEAD); break;
1343 default: goto ignore;
1344 }
1345 break;
1346
1347 default:
1348 unknown:
1349 if (field->report_size == 1) {
1350 if (field->report->type == HID_OUTPUT_REPORT) {
1351 map_led(LED_MISC);
1352 break;
1353 }
1354 map_key(BTN_MISC);
1355 break;
1356 }
1357 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1358 map_rel(REL_MISC);
1359 break;
1360 }
1361 map_abs(ABS_MISC);
1362 break;
1363 }
1364
1365 mapped:
1366 /* Mapping failed, bail out */
1367 if (!bit)
1368 return;
1369
1370 if (device->driver->input_mapped &&
1371 device->driver->input_mapped(device, hidinput, field, usage,
1372 &bit, &max) < 0) {
1373 /*
1374 * The driver indicated that no further generic handling
1375 * of the usage is desired.
1376 */
1377 return;
1378 }
1379
1380 set_bit(usage->type, input->evbit);
1381
1382 /*
1383 * This part is *really* controversial:
1384 * - HID aims at being generic so we should do our best to export
1385 * all incoming events
1386 * - HID describes what events are, so there is no reason for ABS_X
1387 * to be mapped to ABS_Y
1388 * - HID is using *_MISC+N as a default value, but nothing prevents
1389 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1390 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1391 * processing)
1392 *
1393 * If devices still want to use this (at their own risk), they will
1394 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1395 * the default should be a reliable mapping.
1396 */
1397 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1398 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1399 usage->code = find_next_zero_bit(bit,
1400 max + 1,
1401 usage->code);
1402 } else {
1403 device->status |= HID_STAT_DUP_DETECTED;
1404 goto ignore;
1405 }
1406 }
1407
1408 if (usage->code > max)
1409 goto ignore;
1410
1411 if (usage->type == EV_ABS) {
1412
1413 int a = field->logical_minimum;
1414 int b = field->logical_maximum;
1415
1416 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1417 a = field->logical_minimum = 0;
1418 b = field->logical_maximum = 255;
1419 }
1420
1421 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1422 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1423 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1424
1425 input_abs_set_res(input, usage->code,
1426 hidinput_calc_abs_res(field, usage->code));
1427
1428 /* use a larger default input buffer for MT devices */
1429 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1430 input_set_events_per_packet(input, 60);
1431 }
1432
1433 if (usage->type == EV_ABS &&
1434 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1435 int i;
1436 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1437 input_set_abs_params(input, i, -1, 1, 0, 0);
1438 set_bit(i, input->absbit);
1439 }
1440 if (usage->hat_dir && !field->dpad)
1441 field->dpad = usage->code;
1442 }
1443
1444 /* for those devices which produce Consumer volume usage as relative,
1445 * we emulate pressing volumeup/volumedown appropriate number of times
1446 * in hidinput_hid_event()
1447 */
1448 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1449 (usage->code == ABS_VOLUME)) {
1450 set_bit(KEY_VOLUMEUP, input->keybit);
1451 set_bit(KEY_VOLUMEDOWN, input->keybit);
1452 }
1453
1454 if (usage->type == EV_KEY) {
1455 set_bit(EV_MSC, input->evbit);
1456 set_bit(MSC_SCAN, input->mscbit);
1457 }
1458
1459 return;
1460
1461 ignore:
1462 usage->type = 0;
1463 usage->code = 0;
1464 }
1465
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1466 static void hidinput_handle_scroll(struct hid_usage *usage,
1467 struct input_dev *input,
1468 __s32 value)
1469 {
1470 int code;
1471 int hi_res, lo_res;
1472
1473 if (value == 0)
1474 return;
1475
1476 if (usage->code == REL_WHEEL_HI_RES)
1477 code = REL_WHEEL;
1478 else
1479 code = REL_HWHEEL;
1480
1481 /*
1482 * Windows reports one wheel click as value 120. Where a high-res
1483 * scroll wheel is present, a fraction of 120 is reported instead.
1484 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1485 * adhere to the 120 expectation.
1486 */
1487 hi_res = value * 120/usage->resolution_multiplier;
1488
1489 usage->wheel_accumulated += hi_res;
1490 lo_res = usage->wheel_accumulated/120;
1491 if (lo_res)
1492 usage->wheel_accumulated -= lo_res * 120;
1493
1494 input_event(input, EV_REL, code, lo_res);
1495 input_event(input, EV_REL, usage->code, hi_res);
1496 }
1497
hid_report_release_tool(struct hid_report * report,struct input_dev * input,unsigned int tool)1498 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1499 unsigned int tool)
1500 {
1501 /* if the given tool is not currently reported, ignore */
1502 if (!test_bit(tool, input->key))
1503 return;
1504
1505 /*
1506 * if the given tool was previously set, release it,
1507 * release any TOUCH and send an EV_SYN
1508 */
1509 input_event(input, EV_KEY, BTN_TOUCH, 0);
1510 input_event(input, EV_KEY, tool, 0);
1511 input_event(input, EV_SYN, SYN_REPORT, 0);
1512
1513 report->tool = 0;
1514 }
1515
hid_report_set_tool(struct hid_report * report,struct input_dev * input,unsigned int new_tool)1516 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1517 unsigned int new_tool)
1518 {
1519 if (report->tool != new_tool)
1520 hid_report_release_tool(report, input, report->tool);
1521
1522 input_event(input, EV_KEY, new_tool, 1);
1523 report->tool = new_tool;
1524 }
1525
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1526 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1527 {
1528 struct input_dev *input;
1529 struct hid_report *report = field->report;
1530 unsigned *quirks = &hid->quirks;
1531
1532 if (!usage->type)
1533 return;
1534
1535 if (usage->type == EV_PWR) {
1536 hidinput_update_battery(hid, usage->hid, value);
1537 return;
1538 }
1539
1540 if (!field->hidinput)
1541 return;
1542
1543 input = field->hidinput->input;
1544
1545 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1546 int hat_dir = usage->hat_dir;
1547 if (!hat_dir)
1548 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1549 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1550 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1551 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1552 return;
1553 }
1554
1555 /*
1556 * Ignore out-of-range values as per HID specification,
1557 * section 5.10 and 6.2.25, when NULL state bit is present.
1558 * When it's not, clamp the value to match Microsoft's input
1559 * driver as mentioned in "Required HID usages for digitizers":
1560 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1561 *
1562 * The logical_minimum < logical_maximum check is done so that we
1563 * don't unintentionally discard values sent by devices which
1564 * don't specify logical min and max.
1565 */
1566 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1567 field->logical_minimum < field->logical_maximum) {
1568 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1569 (value < field->logical_minimum ||
1570 value > field->logical_maximum)) {
1571 dbg_hid("Ignoring out-of-range value %x\n", value);
1572 return;
1573 }
1574 value = clamp(value,
1575 field->logical_minimum,
1576 field->logical_maximum);
1577 }
1578
1579 switch (usage->hid) {
1580 case HID_DG_ERASER:
1581 report->tool_active |= !!value;
1582
1583 /*
1584 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1585 * to accommodate for devices not following the spec.
1586 */
1587 if (value)
1588 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1589 else if (report->tool != BTN_TOOL_RUBBER)
1590 /* value is off, tool is not rubber, ignore */
1591 return;
1592 else if (*quirks & HID_QUIRK_NOINVERT &&
1593 !test_bit(BTN_TOUCH, input->key)) {
1594 /*
1595 * There is no invert to release the tool, let hid_input
1596 * send BTN_TOUCH with scancode and release the tool after.
1597 */
1598 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1599 return;
1600 }
1601
1602 /* let hid-input set BTN_TOUCH */
1603 break;
1604
1605 case HID_DG_INVERT:
1606 report->tool_active |= !!value;
1607
1608 /*
1609 * If invert is set, we store BTN_TOOL_RUBBER.
1610 */
1611 if (value)
1612 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1613 else if (!report->tool_active)
1614 /* tool_active not set means Invert and Eraser are not set */
1615 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1616
1617 /* no further processing */
1618 return;
1619
1620 case HID_DG_INRANGE:
1621 report->tool_active |= !!value;
1622
1623 if (report->tool_active) {
1624 /*
1625 * if tool is not set but is marked as active,
1626 * assume ours
1627 */
1628 if (!report->tool)
1629 report->tool = usage->code;
1630
1631 /* drivers may have changed the value behind our back, resend it */
1632 hid_report_set_tool(report, input, report->tool);
1633 } else {
1634 hid_report_release_tool(report, input, usage->code);
1635 }
1636
1637 /* reset tool_active for the next event */
1638 report->tool_active = false;
1639
1640 /* no further processing */
1641 return;
1642
1643 case HID_DG_TIPSWITCH:
1644 report->tool_active |= !!value;
1645
1646 /* if tool is set to RUBBER we should ignore the current value */
1647 if (report->tool == BTN_TOOL_RUBBER)
1648 return;
1649
1650 break;
1651
1652 case HID_DG_TIPPRESSURE:
1653 if (*quirks & HID_QUIRK_NOTOUCH) {
1654 int a = field->logical_minimum;
1655 int b = field->logical_maximum;
1656
1657 if (value > a + ((b - a) >> 3)) {
1658 input_event(input, EV_KEY, BTN_TOUCH, 1);
1659 report->tool_active = true;
1660 }
1661 }
1662 break;
1663
1664 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1665 dbg_hid("Maximum Effects - %d\n",value);
1666 return;
1667
1668 case HID_UP_PID | 0x7fUL:
1669 dbg_hid("PID Pool Report\n");
1670 return;
1671 }
1672
1673 switch (usage->type) {
1674 case EV_KEY:
1675 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1676 return;
1677 break;
1678
1679 case EV_REL:
1680 if (usage->code == REL_WHEEL_HI_RES ||
1681 usage->code == REL_HWHEEL_HI_RES) {
1682 hidinput_handle_scroll(usage, input, value);
1683 return;
1684 }
1685 break;
1686
1687 case EV_ABS:
1688 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1689 usage->code == ABS_VOLUME) {
1690 int count = abs(value);
1691 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1692 int i;
1693
1694 for (i = 0; i < count; i++) {
1695 input_event(input, EV_KEY, direction, 1);
1696 input_sync(input);
1697 input_event(input, EV_KEY, direction, 0);
1698 input_sync(input);
1699 }
1700 return;
1701
1702 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1703 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1704 value = field->logical_maximum - value;
1705 break;
1706 }
1707
1708 /*
1709 * Ignore reports for absolute data if the data didn't change. This is
1710 * not only an optimization but also fixes 'dead' key reports. Some
1711 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1712 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1713 * can only have one of them physically available. The 'dead' keys
1714 * report constant 0. As all map to the same keycode, they'd confuse
1715 * the input layer. If we filter the 'dead' keys on the HID level, we
1716 * skip the keycode translation and only forward real events.
1717 */
1718 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1719 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1720 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1721 usage->usage_index < field->maxusage &&
1722 value == field->value[usage->usage_index])
1723 return;
1724
1725 /* report the usage code as scancode if the key status has changed */
1726 if (usage->type == EV_KEY &&
1727 (!test_bit(usage->code, input->key)) == value)
1728 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1729
1730 input_event(input, usage->type, usage->code, value);
1731
1732 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1733 usage->type == EV_KEY && value) {
1734 input_sync(input);
1735 input_event(input, usage->type, usage->code, 0);
1736 }
1737 }
1738
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1739 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1740 {
1741 struct hid_input *hidinput;
1742
1743 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1744 return;
1745
1746 list_for_each_entry(hidinput, &hid->inputs, list)
1747 input_sync(hidinput->input);
1748 }
1749 EXPORT_SYMBOL_GPL(hidinput_report_event);
1750
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1751 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1752 unsigned int code, struct hid_field **field)
1753 {
1754 struct hid_report *report;
1755 int i, j;
1756
1757 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1758 for (i = 0; i < report->maxfield; i++) {
1759 *field = report->field[i];
1760 for (j = 0; j < (*field)->maxusage; j++)
1761 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1762 return j;
1763 }
1764 }
1765 return -1;
1766 }
1767
hidinput_get_led_field(struct hid_device * hid)1768 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1769 {
1770 struct hid_report *report;
1771 struct hid_field *field;
1772 int i, j;
1773
1774 list_for_each_entry(report,
1775 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1776 list) {
1777 for (i = 0; i < report->maxfield; i++) {
1778 field = report->field[i];
1779 for (j = 0; j < field->maxusage; j++)
1780 if (field->usage[j].type == EV_LED)
1781 return field;
1782 }
1783 }
1784 return NULL;
1785 }
1786 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1787
hidinput_count_leds(struct hid_device * hid)1788 unsigned int hidinput_count_leds(struct hid_device *hid)
1789 {
1790 struct hid_report *report;
1791 struct hid_field *field;
1792 int i, j;
1793 unsigned int count = 0;
1794
1795 list_for_each_entry(report,
1796 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1797 list) {
1798 for (i = 0; i < report->maxfield; i++) {
1799 field = report->field[i];
1800 for (j = 0; j < field->maxusage; j++)
1801 if (field->usage[j].type == EV_LED &&
1802 field->value[j])
1803 count += 1;
1804 }
1805 }
1806 return count;
1807 }
1808 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1809
hidinput_led_worker(struct work_struct * work)1810 static void hidinput_led_worker(struct work_struct *work)
1811 {
1812 struct hid_device *hid = container_of(work, struct hid_device,
1813 led_work);
1814 struct hid_field *field;
1815 struct hid_report *report;
1816 int ret;
1817 u32 len;
1818 __u8 *buf;
1819
1820 field = hidinput_get_led_field(hid);
1821 if (!field)
1822 return;
1823
1824 /*
1825 * field->report is accessed unlocked regarding HID core. So there might
1826 * be another incoming SET-LED request from user-space, which changes
1827 * the LED state while we assemble our outgoing buffer. However, this
1828 * doesn't matter as hid_output_report() correctly converts it into a
1829 * boolean value no matter what information is currently set on the LED
1830 * field (even garbage). So the remote device will always get a valid
1831 * request.
1832 * And in case we send a wrong value, a next led worker is spawned
1833 * for every SET-LED request so the following worker will send the
1834 * correct value, guaranteed!
1835 */
1836
1837 report = field->report;
1838
1839 /* use custom SET_REPORT request if possible (asynchronous) */
1840 if (hid->ll_driver->request)
1841 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1842
1843 /* fall back to generic raw-output-report */
1844 len = hid_report_len(report);
1845 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1846 if (!buf)
1847 return;
1848
1849 hid_output_report(report, buf);
1850 /* synchronous output report */
1851 ret = hid_hw_output_report(hid, buf, len);
1852 if (ret == -ENOSYS)
1853 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1854 HID_REQ_SET_REPORT);
1855 kfree(buf);
1856 }
1857
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1858 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1859 unsigned int code, int value)
1860 {
1861 struct hid_device *hid = input_get_drvdata(dev);
1862 struct hid_field *field;
1863 int offset;
1864
1865 if (type == EV_FF)
1866 return input_ff_event(dev, type, code, value);
1867
1868 if (type != EV_LED)
1869 return -1;
1870
1871 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1872 hid_warn(dev, "event field not found\n");
1873 return -1;
1874 }
1875
1876 hid_set_field(field, offset, value);
1877
1878 schedule_work(&hid->led_work);
1879 return 0;
1880 }
1881
hidinput_open(struct input_dev * dev)1882 static int hidinput_open(struct input_dev *dev)
1883 {
1884 struct hid_device *hid = input_get_drvdata(dev);
1885
1886 return hid_hw_open(hid);
1887 }
1888
hidinput_close(struct input_dev * dev)1889 static void hidinput_close(struct input_dev *dev)
1890 {
1891 struct hid_device *hid = input_get_drvdata(dev);
1892
1893 hid_hw_close(hid);
1894 }
1895
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1896 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1897 struct hid_report *report, bool use_logical_max)
1898 {
1899 struct hid_usage *usage;
1900 bool update_needed = false;
1901 bool get_report_completed = false;
1902 int i, j;
1903
1904 if (report->maxfield == 0)
1905 return false;
1906
1907 for (i = 0; i < report->maxfield; i++) {
1908 __s32 value = use_logical_max ?
1909 report->field[i]->logical_maximum :
1910 report->field[i]->logical_minimum;
1911
1912 /* There is no good reason for a Resolution
1913 * Multiplier to have a count other than 1.
1914 * Ignore that case.
1915 */
1916 if (report->field[i]->report_count != 1)
1917 continue;
1918
1919 for (j = 0; j < report->field[i]->maxusage; j++) {
1920 usage = &report->field[i]->usage[j];
1921
1922 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1923 continue;
1924
1925 /*
1926 * If we have more than one feature within this
1927 * report we need to fill in the bits from the
1928 * others before we can overwrite the ones for the
1929 * Resolution Multiplier.
1930 *
1931 * But if we're not allowed to read from the device,
1932 * we just bail. Such a device should not exist
1933 * anyway.
1934 */
1935 if (!get_report_completed && report->maxfield > 1) {
1936 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1937 return update_needed;
1938
1939 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1940 hid_hw_wait(hid);
1941 get_report_completed = true;
1942 }
1943
1944 report->field[i]->value[j] = value;
1945 update_needed = true;
1946 }
1947 }
1948
1949 return update_needed;
1950 }
1951
hidinput_change_resolution_multipliers(struct hid_device * hid)1952 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1953 {
1954 struct hid_report_enum *rep_enum;
1955 struct hid_report *rep;
1956 int ret;
1957
1958 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1959 list_for_each_entry(rep, &rep_enum->report_list, list) {
1960 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1961 rep, true);
1962
1963 if (update_needed) {
1964 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1965 if (ret) {
1966 __hidinput_change_resolution_multipliers(hid,
1967 rep, false);
1968 return;
1969 }
1970 }
1971 }
1972
1973 /* refresh our structs */
1974 hid_setup_resolution_multiplier(hid);
1975 }
1976
report_features(struct hid_device * hid)1977 static void report_features(struct hid_device *hid)
1978 {
1979 struct hid_driver *drv = hid->driver;
1980 struct hid_report_enum *rep_enum;
1981 struct hid_report *rep;
1982 struct hid_usage *usage;
1983 int i, j;
1984
1985 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1986 list_for_each_entry(rep, &rep_enum->report_list, list)
1987 for (i = 0; i < rep->maxfield; i++) {
1988 /* Ignore if report count is out of bounds. */
1989 if (rep->field[i]->report_count < 1)
1990 continue;
1991
1992 for (j = 0; j < rep->field[i]->maxusage; j++) {
1993 usage = &rep->field[i]->usage[j];
1994
1995 /* Verify if Battery Strength feature is available */
1996 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1997 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1998 rep->field[i], false);
1999
2000 if (drv->feature_mapping)
2001 drv->feature_mapping(hid, rep->field[i], usage);
2002 }
2003 }
2004 }
2005
hidinput_allocate(struct hid_device * hid,unsigned int application)2006 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2007 unsigned int application)
2008 {
2009 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2010 struct input_dev *input_dev = input_allocate_device();
2011 const char *suffix = NULL;
2012 size_t suffix_len, name_len;
2013
2014 if (!hidinput || !input_dev)
2015 goto fail;
2016
2017 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2018 hid->maxapplication > 1) {
2019 switch (application) {
2020 case HID_GD_KEYBOARD:
2021 suffix = "Keyboard";
2022 break;
2023 case HID_GD_KEYPAD:
2024 suffix = "Keypad";
2025 break;
2026 case HID_GD_MOUSE:
2027 suffix = "Mouse";
2028 break;
2029 case HID_DG_PEN:
2030 /*
2031 * yes, there is an issue here:
2032 * DG_PEN -> "Stylus"
2033 * DG_STYLUS -> "Pen"
2034 * But changing this now means users with config snippets
2035 * will have to change it and the test suite will not be happy.
2036 */
2037 suffix = "Stylus";
2038 break;
2039 case HID_DG_STYLUS:
2040 suffix = "Pen";
2041 break;
2042 case HID_DG_TOUCHSCREEN:
2043 suffix = "Touchscreen";
2044 break;
2045 case HID_DG_TOUCHPAD:
2046 suffix = "Touchpad";
2047 break;
2048 case HID_GD_SYSTEM_CONTROL:
2049 suffix = "System Control";
2050 break;
2051 case HID_CP_CONSUMER_CONTROL:
2052 suffix = "Consumer Control";
2053 break;
2054 case HID_GD_WIRELESS_RADIO_CTLS:
2055 suffix = "Wireless Radio Control";
2056 break;
2057 case HID_GD_SYSTEM_MULTIAXIS:
2058 suffix = "System Multi Axis";
2059 break;
2060 default:
2061 break;
2062 }
2063 }
2064
2065 if (suffix) {
2066 name_len = strlen(hid->name);
2067 suffix_len = strlen(suffix);
2068 if ((name_len < suffix_len) ||
2069 strcmp(hid->name + name_len - suffix_len, suffix)) {
2070 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2071 hid->name, suffix);
2072 if (!hidinput->name)
2073 goto fail;
2074 }
2075 }
2076
2077 input_set_drvdata(input_dev, hid);
2078 input_dev->event = hidinput_input_event;
2079 input_dev->open = hidinput_open;
2080 input_dev->close = hidinput_close;
2081 input_dev->setkeycode = hidinput_setkeycode;
2082 input_dev->getkeycode = hidinput_getkeycode;
2083
2084 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2085 input_dev->phys = hid->phys;
2086 input_dev->uniq = hid->uniq;
2087 input_dev->id.bustype = hid->bus;
2088 input_dev->id.vendor = hid->vendor;
2089 input_dev->id.product = hid->product;
2090 input_dev->id.version = hid->version;
2091 input_dev->dev.parent = &hid->dev;
2092
2093 hidinput->input = input_dev;
2094 hidinput->application = application;
2095 list_add_tail(&hidinput->list, &hid->inputs);
2096
2097 INIT_LIST_HEAD(&hidinput->reports);
2098
2099 return hidinput;
2100
2101 fail:
2102 kfree(hidinput);
2103 input_free_device(input_dev);
2104 hid_err(hid, "Out of memory during hid input probe\n");
2105 return NULL;
2106 }
2107
hidinput_has_been_populated(struct hid_input * hidinput)2108 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2109 {
2110 int i;
2111 unsigned long r = 0;
2112
2113 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2114 r |= hidinput->input->evbit[i];
2115
2116 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2117 r |= hidinput->input->keybit[i];
2118
2119 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2120 r |= hidinput->input->relbit[i];
2121
2122 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2123 r |= hidinput->input->absbit[i];
2124
2125 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2126 r |= hidinput->input->mscbit[i];
2127
2128 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2129 r |= hidinput->input->ledbit[i];
2130
2131 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2132 r |= hidinput->input->sndbit[i];
2133
2134 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2135 r |= hidinput->input->ffbit[i];
2136
2137 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2138 r |= hidinput->input->swbit[i];
2139
2140 return !!r;
2141 }
2142
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)2143 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2144 struct hid_input *hidinput)
2145 {
2146 struct hid_report *report;
2147 int i, k;
2148
2149 list_del(&hidinput->list);
2150 input_free_device(hidinput->input);
2151 kfree(hidinput->name);
2152
2153 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2154 if (k == HID_OUTPUT_REPORT &&
2155 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2156 continue;
2157
2158 list_for_each_entry(report, &hid->report_enum[k].report_list,
2159 list) {
2160
2161 for (i = 0; i < report->maxfield; i++)
2162 if (report->field[i]->hidinput == hidinput)
2163 report->field[i]->hidinput = NULL;
2164 }
2165 }
2166
2167 kfree(hidinput);
2168 }
2169
hidinput_match(struct hid_report * report)2170 static struct hid_input *hidinput_match(struct hid_report *report)
2171 {
2172 struct hid_device *hid = report->device;
2173 struct hid_input *hidinput;
2174
2175 list_for_each_entry(hidinput, &hid->inputs, list) {
2176 if (hidinput->report &&
2177 hidinput->report->id == report->id)
2178 return hidinput;
2179 }
2180
2181 return NULL;
2182 }
2183
hidinput_match_application(struct hid_report * report)2184 static struct hid_input *hidinput_match_application(struct hid_report *report)
2185 {
2186 struct hid_device *hid = report->device;
2187 struct hid_input *hidinput;
2188
2189 list_for_each_entry(hidinput, &hid->inputs, list) {
2190 if (hidinput->application == report->application)
2191 return hidinput;
2192
2193 /*
2194 * Keep SystemControl and ConsumerControl applications together
2195 * with the main keyboard, if present.
2196 */
2197 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2198 report->application == HID_CP_CONSUMER_CONTROL) &&
2199 hidinput->application == HID_GD_KEYBOARD) {
2200 return hidinput;
2201 }
2202 }
2203
2204 return NULL;
2205 }
2206
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)2207 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2208 struct hid_report *report)
2209 {
2210 int i, j, k;
2211 int first_field_index = 0;
2212 int slot_collection_index = -1;
2213 int prev_collection_index = -1;
2214 unsigned int slot_idx = 0;
2215 struct hid_field *field;
2216
2217 /*
2218 * First tag all the fields that are part of a slot,
2219 * a slot needs to have one Contact ID in the collection
2220 */
2221 for (i = 0; i < report->maxfield; i++) {
2222 field = report->field[i];
2223
2224 /* ignore fields without usage */
2225 if (field->maxusage < 1)
2226 continue;
2227
2228 /*
2229 * janitoring when collection_index changes
2230 */
2231 if (prev_collection_index != field->usage->collection_index) {
2232 prev_collection_index = field->usage->collection_index;
2233 first_field_index = i;
2234 }
2235
2236 /*
2237 * if we already found a Contact ID in the collection,
2238 * tag and continue to the next.
2239 */
2240 if (slot_collection_index == field->usage->collection_index) {
2241 field->slot_idx = slot_idx;
2242 continue;
2243 }
2244
2245 /* check if the current field has Contact ID */
2246 for (j = 0; j < field->maxusage; j++) {
2247 if (field->usage[j].hid == HID_DG_CONTACTID) {
2248 slot_collection_index = field->usage->collection_index;
2249 slot_idx++;
2250
2251 /*
2252 * mark all previous fields and this one in the
2253 * current collection to be slotted.
2254 */
2255 for (k = first_field_index; k <= i; k++)
2256 report->field[k]->slot_idx = slot_idx;
2257 break;
2258 }
2259 }
2260 }
2261
2262 for (i = 0; i < report->maxfield; i++)
2263 for (j = 0; j < report->field[i]->maxusage; j++)
2264 hidinput_configure_usage(hidinput, report->field[i],
2265 report->field[i]->usage + j,
2266 j);
2267 }
2268
2269 /*
2270 * Register the input device; print a message.
2271 * Configure the input layer interface
2272 * Read all reports and initialize the absolute field values.
2273 */
2274
hidinput_connect(struct hid_device * hid,unsigned int force)2275 int hidinput_connect(struct hid_device *hid, unsigned int force)
2276 {
2277 struct hid_driver *drv = hid->driver;
2278 struct hid_report *report;
2279 struct hid_input *next, *hidinput = NULL;
2280 unsigned int application;
2281 int i, k;
2282
2283 INIT_LIST_HEAD(&hid->inputs);
2284 INIT_WORK(&hid->led_work, hidinput_led_worker);
2285
2286 hid->status &= ~HID_STAT_DUP_DETECTED;
2287
2288 if (!force) {
2289 for (i = 0; i < hid->maxcollection; i++) {
2290 struct hid_collection *col = &hid->collection[i];
2291 if (col->type == HID_COLLECTION_APPLICATION ||
2292 col->type == HID_COLLECTION_PHYSICAL)
2293 if (IS_INPUT_APPLICATION(col->usage))
2294 break;
2295 }
2296
2297 if (i == hid->maxcollection)
2298 return -1;
2299 }
2300
2301 report_features(hid);
2302
2303 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2304 if (k == HID_OUTPUT_REPORT &&
2305 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2306 continue;
2307
2308 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2309
2310 if (!report->maxfield)
2311 continue;
2312
2313 application = report->application;
2314
2315 /*
2316 * Find the previous hidinput report attached
2317 * to this report id.
2318 */
2319 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2320 hidinput = hidinput_match(report);
2321 else if (hid->maxapplication > 1 &&
2322 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2323 hidinput = hidinput_match_application(report);
2324
2325 if (!hidinput) {
2326 hidinput = hidinput_allocate(hid, application);
2327 if (!hidinput)
2328 goto out_unwind;
2329 }
2330
2331 hidinput_configure_usages(hidinput, report);
2332
2333 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2334 hidinput->report = report;
2335
2336 list_add_tail(&report->hidinput_list,
2337 &hidinput->reports);
2338 }
2339 }
2340
2341 hidinput_change_resolution_multipliers(hid);
2342
2343 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2344 if (drv->input_configured &&
2345 drv->input_configured(hid, hidinput))
2346 goto out_unwind;
2347
2348 if (!hidinput_has_been_populated(hidinput)) {
2349 /* no need to register an input device not populated */
2350 hidinput_cleanup_hidinput(hid, hidinput);
2351 continue;
2352 }
2353
2354 if (input_register_device(hidinput->input))
2355 goto out_unwind;
2356 hidinput->registered = true;
2357 }
2358
2359 if (list_empty(&hid->inputs)) {
2360 hid_dbg(hid, "No inputs registered, leaving\n");
2361 goto out_unwind;
2362 }
2363
2364 if (hid->status & HID_STAT_DUP_DETECTED)
2365 hid_dbg(hid,
2366 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2367
2368 return 0;
2369
2370 out_unwind:
2371 /* unwind the ones we already registered */
2372 hidinput_disconnect(hid);
2373
2374 return -1;
2375 }
2376 EXPORT_SYMBOL_GPL(hidinput_connect);
2377
hidinput_disconnect(struct hid_device * hid)2378 void hidinput_disconnect(struct hid_device *hid)
2379 {
2380 struct hid_input *hidinput, *next;
2381
2382 hidinput_cleanup_battery(hid);
2383
2384 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2385 list_del(&hidinput->list);
2386 if (hidinput->registered)
2387 input_unregister_device(hidinput->input);
2388 else
2389 input_free_device(hidinput->input);
2390 kfree(hidinput->name);
2391 kfree(hidinput);
2392 }
2393
2394 /* led_work is spawned by input_dev callbacks, but doesn't access the
2395 * parent input_dev at all. Once all input devices are removed, we
2396 * know that led_work will never get restarted, so we can cancel it
2397 * synchronously and are safe. */
2398 cancel_work_sync(&hid->led_work);
2399 }
2400 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2401
2402 #ifdef CONFIG_HID_KUNIT_TEST
2403 #include "hid-input-test.c"
2404 #endif
2405