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 HID touchscreens seem to all report a non present battery,
403 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
404 */
405 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
406 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
407 {}
408 };
409
find_battery_quirk(struct hid_device * hdev)410 static unsigned find_battery_quirk(struct hid_device *hdev)
411 {
412 unsigned quirks = 0;
413 const struct hid_device_id *match;
414
415 match = hid_match_id(hdev, hid_battery_quirks);
416 if (match != NULL)
417 quirks = match->driver_data;
418
419 return quirks;
420 }
421
hidinput_scale_battery_capacity(struct hid_device * dev,int value)422 static int hidinput_scale_battery_capacity(struct hid_device *dev,
423 int value)
424 {
425 if (dev->battery_min < dev->battery_max &&
426 value >= dev->battery_min && value <= dev->battery_max)
427 value = ((value - dev->battery_min) * 100) /
428 (dev->battery_max - dev->battery_min);
429
430 return value;
431 }
432
hidinput_query_battery_capacity(struct hid_device * dev)433 static int hidinput_query_battery_capacity(struct hid_device *dev)
434 {
435 u8 *buf;
436 int ret;
437
438 buf = kmalloc(4, GFP_KERNEL);
439 if (!buf)
440 return -ENOMEM;
441
442 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
443 dev->battery_report_type, HID_REQ_GET_REPORT);
444 if (ret < 2) {
445 kfree(buf);
446 return -ENODATA;
447 }
448
449 ret = hidinput_scale_battery_capacity(dev, buf[1]);
450 kfree(buf);
451 return ret;
452 }
453
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)454 static int hidinput_get_battery_property(struct power_supply *psy,
455 enum power_supply_property prop,
456 union power_supply_propval *val)
457 {
458 struct hid_device *dev = power_supply_get_drvdata(psy);
459 int value;
460 int ret = 0;
461
462 switch (prop) {
463 case POWER_SUPPLY_PROP_PRESENT:
464 case POWER_SUPPLY_PROP_ONLINE:
465 val->intval = 1;
466 break;
467
468 case POWER_SUPPLY_PROP_CAPACITY:
469 if (dev->battery_status != HID_BATTERY_REPORTED &&
470 !dev->battery_avoid_query) {
471 value = hidinput_query_battery_capacity(dev);
472 if (value < 0)
473 return value;
474 } else {
475 value = dev->battery_capacity;
476 }
477
478 val->intval = value;
479 break;
480
481 case POWER_SUPPLY_PROP_MODEL_NAME:
482 val->strval = dev->name;
483 break;
484
485 case POWER_SUPPLY_PROP_STATUS:
486 if (dev->battery_status != HID_BATTERY_REPORTED &&
487 !dev->battery_avoid_query) {
488 value = hidinput_query_battery_capacity(dev);
489 if (value < 0)
490 return value;
491
492 dev->battery_capacity = value;
493 dev->battery_status = HID_BATTERY_QUERIED;
494 }
495
496 if (dev->battery_status == HID_BATTERY_UNKNOWN)
497 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
498 else
499 val->intval = dev->battery_charge_status;
500 break;
501
502 case POWER_SUPPLY_PROP_SCOPE:
503 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
504 break;
505
506 default:
507 ret = -EINVAL;
508 break;
509 }
510
511 return ret;
512 }
513
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)514 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
515 struct hid_field *field, bool is_percentage)
516 {
517 struct power_supply_desc *psy_desc;
518 struct power_supply_config psy_cfg = { .drv_data = dev, };
519 unsigned quirks;
520 s32 min, max;
521 int error;
522
523 if (dev->battery)
524 return 0; /* already initialized? */
525
526 quirks = find_battery_quirk(dev);
527
528 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
529 dev->bus, dev->vendor, dev->product, dev->version, quirks);
530
531 if (quirks & HID_BATTERY_QUIRK_IGNORE)
532 return 0;
533
534 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
535 if (!psy_desc)
536 return -ENOMEM;
537
538 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
539 strlen(dev->uniq) ?
540 dev->uniq : dev_name(&dev->dev));
541 if (!psy_desc->name) {
542 error = -ENOMEM;
543 goto err_free_mem;
544 }
545
546 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
547 psy_desc->properties = hidinput_battery_props;
548 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
549 psy_desc->use_for_apm = 0;
550 psy_desc->get_property = hidinput_get_battery_property;
551
552 min = field->logical_minimum;
553 max = field->logical_maximum;
554
555 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
556 min = 0;
557 max = 100;
558 }
559
560 if (quirks & HID_BATTERY_QUIRK_FEATURE)
561 report_type = HID_FEATURE_REPORT;
562
563 dev->battery_min = min;
564 dev->battery_max = max;
565 dev->battery_report_type = report_type;
566 dev->battery_report_id = field->report->id;
567 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
568
569 /*
570 * Stylus is normally not connected to the device and thus we
571 * can't query the device and get meaningful battery strength.
572 * We have to wait for the device to report it on its own.
573 */
574 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
575 field->physical == HID_DG_STYLUS;
576
577 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
578 dev->battery_avoid_query = true;
579
580 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
581 if (IS_ERR(dev->battery)) {
582 error = PTR_ERR(dev->battery);
583 hid_warn(dev, "can't register power supply: %d\n", error);
584 goto err_free_name;
585 }
586
587 power_supply_powers(dev->battery, &dev->dev);
588 return 0;
589
590 err_free_name:
591 kfree(psy_desc->name);
592 err_free_mem:
593 kfree(psy_desc);
594 dev->battery = NULL;
595 return error;
596 }
597
hidinput_cleanup_battery(struct hid_device * dev)598 static void hidinput_cleanup_battery(struct hid_device *dev)
599 {
600 const struct power_supply_desc *psy_desc;
601
602 if (!dev->battery)
603 return;
604
605 psy_desc = dev->battery->desc;
606 power_supply_unregister(dev->battery);
607 kfree(psy_desc->name);
608 kfree(psy_desc);
609 dev->battery = NULL;
610 }
611
hidinput_update_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)612 static bool hidinput_update_battery_charge_status(struct hid_device *dev,
613 unsigned int usage, int value)
614 {
615 switch (usage) {
616 case HID_BAT_CHARGING:
617 dev->battery_charge_status = value ?
618 POWER_SUPPLY_STATUS_CHARGING :
619 POWER_SUPPLY_STATUS_DISCHARGING;
620 return true;
621 }
622
623 return false;
624 }
625
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)626 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
627 int value)
628 {
629 int capacity;
630
631 if (!dev->battery)
632 return;
633
634 if (hidinput_update_battery_charge_status(dev, usage, value)) {
635 power_supply_changed(dev->battery);
636 return;
637 }
638
639 if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
640 return;
641
642 if (value < dev->battery_min || value > dev->battery_max)
643 return;
644
645 capacity = hidinput_scale_battery_capacity(dev, value);
646
647 if (dev->battery_status != HID_BATTERY_REPORTED ||
648 capacity != dev->battery_capacity ||
649 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
650 dev->battery_capacity = capacity;
651 dev->battery_status = HID_BATTERY_REPORTED;
652 dev->battery_ratelimit_time =
653 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
654 power_supply_changed(dev->battery);
655 }
656 }
657 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)658 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
659 struct hid_field *field, bool is_percentage)
660 {
661 return 0;
662 }
663
hidinput_cleanup_battery(struct hid_device * dev)664 static void hidinput_cleanup_battery(struct hid_device *dev)
665 {
666 }
667
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)668 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
669 int value)
670 {
671 }
672 #endif /* CONFIG_HID_BATTERY_STRENGTH */
673
hidinput_field_in_collection(struct hid_device * device,struct hid_field * field,unsigned int type,unsigned int usage)674 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
675 unsigned int type, unsigned int usage)
676 {
677 struct hid_collection *collection;
678
679 collection = &device->collection[field->usage->collection_index];
680
681 return collection->type == type && collection->usage == usage;
682 }
683
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage,unsigned int usage_index)684 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
685 struct hid_usage *usage, unsigned int usage_index)
686 {
687 struct input_dev *input = hidinput->input;
688 struct hid_device *device = input_get_drvdata(input);
689 const struct usage_priority *usage_priority = NULL;
690 int max = 0, code;
691 unsigned int i = 0;
692 unsigned long *bit = NULL;
693
694 field->hidinput = hidinput;
695
696 if (field->flags & HID_MAIN_ITEM_CONSTANT)
697 goto ignore;
698
699 /* Ignore if report count is out of bounds. */
700 if (field->report_count < 1)
701 goto ignore;
702
703 /* only LED and HAPTIC usages are supported in output fields */
704 if (field->report_type == HID_OUTPUT_REPORT &&
705 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
706 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
707 goto ignore;
708 }
709
710 /* assign a priority based on the static list declared here */
711 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
712 if (usage->hid == hidinput_usages_priorities[i].usage) {
713 usage_priority = &hidinput_usages_priorities[i];
714
715 field->usages_priorities[usage_index] =
716 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
717 break;
718 }
719 }
720
721 /*
722 * For slotted devices, we need to also add the slot index
723 * in the priority.
724 */
725 if (usage_priority && usage_priority->global)
726 field->usages_priorities[usage_index] |=
727 usage_priority->slot_overwrite;
728 else
729 field->usages_priorities[usage_index] |=
730 (0xff - field->slot_idx) << 16;
731
732 if (device->driver->input_mapping) {
733 int ret = device->driver->input_mapping(device, hidinput, field,
734 usage, &bit, &max);
735 if (ret > 0)
736 goto mapped;
737 if (ret < 0)
738 goto ignore;
739 }
740
741 switch (usage->hid & HID_USAGE_PAGE) {
742 case HID_UP_UNDEFINED:
743 goto ignore;
744
745 case HID_UP_KEYBOARD:
746 set_bit(EV_REP, input->evbit);
747
748 if ((usage->hid & HID_USAGE) < 256) {
749 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
750 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
751 } else
752 map_key(KEY_UNKNOWN);
753
754 break;
755
756 case HID_UP_BUTTON:
757 code = ((usage->hid - 1) & HID_USAGE);
758
759 switch (field->application) {
760 case HID_GD_MOUSE:
761 case HID_GD_POINTER: code += BTN_MOUSE; break;
762 case HID_GD_JOYSTICK:
763 if (code <= 0xf)
764 code += BTN_JOYSTICK;
765 else
766 code += BTN_TRIGGER_HAPPY - 0x10;
767 break;
768 case HID_GD_GAMEPAD:
769 if (code <= 0xf)
770 code += BTN_GAMEPAD;
771 else
772 code += BTN_TRIGGER_HAPPY - 0x10;
773 break;
774 case HID_CP_CONSUMER_CONTROL:
775 if (hidinput_field_in_collection(device, field,
776 HID_COLLECTION_NAMED_ARRAY,
777 HID_CP_PROGRAMMABLEBUTTONS)) {
778 if (code <= 0x1d)
779 code += KEY_MACRO1;
780 else
781 code += BTN_TRIGGER_HAPPY - 0x1e;
782 break;
783 }
784 fallthrough;
785 default:
786 switch (field->physical) {
787 case HID_GD_MOUSE:
788 case HID_GD_POINTER: code += BTN_MOUSE; break;
789 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
790 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
791 default: code += BTN_MISC;
792 }
793 }
794
795 map_key(code);
796 break;
797
798 case HID_UP_SIMULATION:
799 switch (usage->hid & 0xffff) {
800 case 0xba: map_abs(ABS_RUDDER); break;
801 case 0xbb: map_abs(ABS_THROTTLE); break;
802 case 0xc4: map_abs(ABS_GAS); break;
803 case 0xc5: map_abs(ABS_BRAKE); break;
804 case 0xc8: map_abs(ABS_WHEEL); break;
805 default: goto ignore;
806 }
807 break;
808
809 case HID_UP_GENDESK:
810 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
811 switch (usage->hid & 0xf) {
812 case 0x1: map_key_clear(KEY_POWER); break;
813 case 0x2: map_key_clear(KEY_SLEEP); break;
814 case 0x3: map_key_clear(KEY_WAKEUP); break;
815 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
816 case 0x5: map_key_clear(KEY_MENU); break;
817 case 0x6: map_key_clear(KEY_PROG1); break;
818 case 0x7: map_key_clear(KEY_HELP); break;
819 case 0x8: map_key_clear(KEY_EXIT); break;
820 case 0x9: map_key_clear(KEY_SELECT); break;
821 case 0xa: map_key_clear(KEY_RIGHT); break;
822 case 0xb: map_key_clear(KEY_LEFT); break;
823 case 0xc: map_key_clear(KEY_UP); break;
824 case 0xd: map_key_clear(KEY_DOWN); break;
825 case 0xe: map_key_clear(KEY_POWER2); break;
826 case 0xf: map_key_clear(KEY_RESTART); break;
827 default: goto unknown;
828 }
829 break;
830 }
831
832 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
833 switch (usage->hid) {
834 case HID_GD_UP: usage->hat_dir = 1; break;
835 case HID_GD_DOWN: usage->hat_dir = 5; break;
836 case HID_GD_RIGHT: usage->hat_dir = 3; break;
837 case HID_GD_LEFT: usage->hat_dir = 7; break;
838 case HID_GD_DO_NOT_DISTURB:
839 map_key_clear(KEY_DO_NOT_DISTURB); break;
840 default: goto unknown;
841 }
842
843 if (usage->hid <= HID_GD_LEFT) {
844 if (field->dpad) {
845 map_abs(field->dpad);
846 goto ignore;
847 }
848 map_abs(ABS_HAT0X);
849 }
850 break;
851 }
852
853 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
854 switch (usage->hid & 0xf) {
855 case 0x9: map_key_clear(KEY_MICMUTE); break;
856 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
857 default: goto ignore;
858 }
859 break;
860 }
861
862 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
863 switch (usage->hid & 0xf) {
864 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
865 default: goto ignore;
866 }
867 break;
868 }
869
870 /*
871 * Some lazy vendors declare 255 usages for System Control,
872 * leading to the creation of ABS_X|Y axis and too many others.
873 * It wouldn't be a problem if joydev doesn't consider the
874 * device as a joystick then.
875 */
876 if (field->application == HID_GD_SYSTEM_CONTROL)
877 goto ignore;
878
879 switch (usage->hid) {
880 /* These usage IDs map directly to the usage codes. */
881 case HID_GD_X: case HID_GD_Y:
882 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
883 if (field->flags & HID_MAIN_ITEM_RELATIVE)
884 map_rel(usage->hid & 0xf);
885 else
886 map_abs_clear(usage->hid & 0xf);
887 break;
888
889 case HID_GD_Z:
890 /* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */
891 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
892 map_rel(usage->hid & 0xf);
893 } else {
894 if (field->application == HID_DG_PEN ||
895 field->physical == HID_DG_PEN ||
896 field->logical == HID_DG_STYLUS ||
897 field->physical == HID_DG_STYLUS ||
898 field->application == HID_DG_DIGITIZER)
899 map_abs_clear(ABS_DISTANCE);
900 else
901 map_abs_clear(usage->hid & 0xf);
902 }
903 break;
904
905 case HID_GD_WHEEL:
906 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
907 set_bit(REL_WHEEL, input->relbit);
908 map_rel(REL_WHEEL_HI_RES);
909 } else {
910 map_abs(usage->hid & 0xf);
911 }
912 break;
913 case HID_GD_SLIDER: case HID_GD_DIAL:
914 if (field->flags & HID_MAIN_ITEM_RELATIVE)
915 map_rel(usage->hid & 0xf);
916 else
917 map_abs(usage->hid & 0xf);
918 break;
919
920 case HID_GD_HATSWITCH:
921 usage->hat_min = field->logical_minimum;
922 usage->hat_max = field->logical_maximum;
923 map_abs(ABS_HAT0X);
924 break;
925
926 case HID_GD_START: map_key_clear(BTN_START); break;
927 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
928
929 case HID_GD_RFKILL_BTN:
930 /* MS wireless radio ctl extension, also check CA */
931 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
932 map_key_clear(KEY_RFKILL);
933 /* We need to simulate the btn release */
934 field->flags |= HID_MAIN_ITEM_RELATIVE;
935 break;
936 }
937 goto unknown;
938
939 default: goto unknown;
940 }
941
942 break;
943
944 case HID_UP_LED:
945 switch (usage->hid & 0xffff) { /* HID-Value: */
946 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
947 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
948 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
949 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
950 case 0x05: map_led (LED_KANA); break; /* "Kana" */
951 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
952 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
953 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
954 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
955 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
956 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
957
958 default: goto ignore;
959 }
960 break;
961
962 case HID_UP_DIGITIZER:
963 if ((field->application & 0xff) == 0x01) /* Digitizer */
964 __set_bit(INPUT_PROP_POINTER, input->propbit);
965 else if ((field->application & 0xff) == 0x02) /* Pen */
966 __set_bit(INPUT_PROP_DIRECT, input->propbit);
967
968 switch (usage->hid & 0xff) {
969 case 0x00: /* Undefined */
970 goto ignore;
971
972 case 0x30: /* TipPressure */
973 if (!test_bit(BTN_TOUCH, input->keybit)) {
974 device->quirks |= HID_QUIRK_NOTOUCH;
975 set_bit(EV_KEY, input->evbit);
976 set_bit(BTN_TOUCH, input->keybit);
977 }
978 map_abs_clear(ABS_PRESSURE);
979 break;
980
981 case 0x32: /* InRange */
982 switch (field->physical) {
983 case HID_DG_PUCK:
984 map_key(BTN_TOOL_MOUSE);
985 break;
986 case HID_DG_FINGER:
987 map_key(BTN_TOOL_FINGER);
988 break;
989 default:
990 /*
991 * If the physical is not given,
992 * rely on the application.
993 */
994 if (!field->physical) {
995 switch (field->application) {
996 case HID_DG_TOUCHSCREEN:
997 case HID_DG_TOUCHPAD:
998 map_key_clear(BTN_TOOL_FINGER);
999 break;
1000 default:
1001 map_key_clear(BTN_TOOL_PEN);
1002 }
1003 } else {
1004 map_key(BTN_TOOL_PEN);
1005 }
1006 break;
1007 }
1008 break;
1009
1010 case 0x3b: /* Battery Strength */
1011 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1012 usage->type = EV_PWR;
1013 return;
1014
1015 case 0x3c: /* Invert */
1016 device->quirks &= ~HID_QUIRK_NOINVERT;
1017 map_key_clear(BTN_TOOL_RUBBER);
1018 break;
1019
1020 case 0x3d: /* X Tilt */
1021 map_abs_clear(ABS_TILT_X);
1022 break;
1023
1024 case 0x3e: /* Y Tilt */
1025 map_abs_clear(ABS_TILT_Y);
1026 break;
1027
1028 case 0x33: /* Touch */
1029 case 0x42: /* TipSwitch */
1030 case 0x43: /* TipSwitch2 */
1031 device->quirks &= ~HID_QUIRK_NOTOUCH;
1032 map_key_clear(BTN_TOUCH);
1033 break;
1034
1035 case 0x44: /* BarrelSwitch */
1036 map_key_clear(BTN_STYLUS);
1037 break;
1038
1039 case 0x45: /* ERASER */
1040 /*
1041 * This event is reported when eraser tip touches the surface.
1042 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1043 * by Invert if tool reports proximity or by Eraser directly.
1044 */
1045 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1046 device->quirks |= HID_QUIRK_NOINVERT;
1047 set_bit(BTN_TOOL_RUBBER, input->keybit);
1048 }
1049 map_key_clear(BTN_TOUCH);
1050 break;
1051
1052 case 0x46: /* TabletPick */
1053 case 0x5a: /* SecondaryBarrelSwitch */
1054 map_key_clear(BTN_STYLUS2);
1055 break;
1056
1057 case 0x5b: /* TransducerSerialNumber */
1058 case 0x6e: /* TransducerSerialNumber2 */
1059 map_msc(MSC_SERIAL);
1060 break;
1061
1062 default: goto unknown;
1063 }
1064 break;
1065
1066 case HID_UP_TELEPHONY:
1067 switch (usage->hid & HID_USAGE) {
1068 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1069 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1070 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1071 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1072 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1073 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1074 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1075 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1076 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1077 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1078 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1079 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1080 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1081 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1082 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1083 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1084 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1085 default: goto ignore;
1086 }
1087 break;
1088
1089 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1090 switch (usage->hid & HID_USAGE) {
1091 case 0x000: goto ignore;
1092 case 0x030: map_key_clear(KEY_POWER); break;
1093 case 0x031: map_key_clear(KEY_RESTART); break;
1094 case 0x032: map_key_clear(KEY_SLEEP); break;
1095 case 0x034: map_key_clear(KEY_SLEEP); break;
1096 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1097 case 0x036: map_key_clear(BTN_MISC); break;
1098
1099 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1100 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1101 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1102 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1103 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1104 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1105 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1106 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1107 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1108
1109 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1110 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1111 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1112 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1113 case 0x069: map_key_clear(KEY_RED); break;
1114 case 0x06a: map_key_clear(KEY_GREEN); break;
1115 case 0x06b: map_key_clear(KEY_BLUE); break;
1116 case 0x06c: map_key_clear(KEY_YELLOW); break;
1117 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1118
1119 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1120 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1121 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1122 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1123 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1124 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1125
1126 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1127 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1128 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1129
1130 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1131 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1132 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1133
1134 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1135 case 0x083: map_key_clear(KEY_LAST); break;
1136 case 0x084: map_key_clear(KEY_ENTER); break;
1137 case 0x088: map_key_clear(KEY_PC); break;
1138 case 0x089: map_key_clear(KEY_TV); break;
1139 case 0x08a: map_key_clear(KEY_WWW); break;
1140 case 0x08b: map_key_clear(KEY_DVD); break;
1141 case 0x08c: map_key_clear(KEY_PHONE); break;
1142 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1143 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1144 case 0x08f: map_key_clear(KEY_GAMES); break;
1145 case 0x090: map_key_clear(KEY_MEMO); break;
1146 case 0x091: map_key_clear(KEY_CD); break;
1147 case 0x092: map_key_clear(KEY_VCR); break;
1148 case 0x093: map_key_clear(KEY_TUNER); break;
1149 case 0x094: map_key_clear(KEY_EXIT); break;
1150 case 0x095: map_key_clear(KEY_HELP); break;
1151 case 0x096: map_key_clear(KEY_TAPE); break;
1152 case 0x097: map_key_clear(KEY_TV2); break;
1153 case 0x098: map_key_clear(KEY_SAT); break;
1154 case 0x09a: map_key_clear(KEY_PVR); break;
1155
1156 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1157 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1158 case 0x0a0: map_key_clear(KEY_VCR2); break;
1159
1160 case 0x0b0: map_key_clear(KEY_PLAY); break;
1161 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1162 case 0x0b2: map_key_clear(KEY_RECORD); break;
1163 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1164 case 0x0b4: map_key_clear(KEY_REWIND); break;
1165 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1166 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1167 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1168 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1169 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1170 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1171 case 0x0bf: map_key_clear(KEY_SLOW); break;
1172
1173 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1174 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1175
1176 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1177 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1178
1179 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1180 case 0x0e2: map_key_clear(KEY_MUTE); break;
1181 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1182 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1183 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1184 case 0x0f5: map_key_clear(KEY_SLOW); break;
1185
1186 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1187 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1188 case 0x183: map_key_clear(KEY_CONFIG); break;
1189 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1190 case 0x185: map_key_clear(KEY_EDITOR); break;
1191 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1192 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1193 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1194 case 0x189: map_key_clear(KEY_DATABASE); break;
1195 case 0x18a: map_key_clear(KEY_MAIL); break;
1196 case 0x18b: map_key_clear(KEY_NEWS); break;
1197 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1198 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1199 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1200 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1201 case 0x190: map_key_clear(KEY_JOURNAL); break;
1202 case 0x191: map_key_clear(KEY_FINANCE); break;
1203 case 0x192: map_key_clear(KEY_CALC); break;
1204 case 0x193: map_key_clear(KEY_PLAYER); break;
1205 case 0x194: map_key_clear(KEY_FILE); break;
1206 case 0x196: map_key_clear(KEY_WWW); break;
1207 case 0x199: map_key_clear(KEY_CHAT); break;
1208 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1209 case 0x19e: map_key_clear(KEY_COFFEE); break;
1210 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1211 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1212 case 0x1a3: map_key_clear(KEY_NEXT); break;
1213 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1214 case 0x1a6: map_key_clear(KEY_HELP); break;
1215 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1216 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1217 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1218 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1219 case 0x1b4: map_key_clear(KEY_FILE); break;
1220 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1221 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1222 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1223 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1224 case 0x1bd: map_key_clear(KEY_INFO); break;
1225 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1226 case 0x201: map_key_clear(KEY_NEW); break;
1227 case 0x202: map_key_clear(KEY_OPEN); break;
1228 case 0x203: map_key_clear(KEY_CLOSE); break;
1229 case 0x204: map_key_clear(KEY_EXIT); break;
1230 case 0x207: map_key_clear(KEY_SAVE); break;
1231 case 0x208: map_key_clear(KEY_PRINT); break;
1232 case 0x209: map_key_clear(KEY_PROPS); break;
1233 case 0x21a: map_key_clear(KEY_UNDO); break;
1234 case 0x21b: map_key_clear(KEY_COPY); break;
1235 case 0x21c: map_key_clear(KEY_CUT); break;
1236 case 0x21d: map_key_clear(KEY_PASTE); break;
1237 case 0x21f: map_key_clear(KEY_FIND); break;
1238 case 0x221: map_key_clear(KEY_SEARCH); break;
1239 case 0x222: map_key_clear(KEY_GOTO); break;
1240 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1241 case 0x224: map_key_clear(KEY_BACK); break;
1242 case 0x225: map_key_clear(KEY_FORWARD); break;
1243 case 0x226: map_key_clear(KEY_STOP); break;
1244 case 0x227: map_key_clear(KEY_REFRESH); break;
1245 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1246 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1247 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1248 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1249 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1250 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1251 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1252 case 0x238: /* AC Pan */
1253 set_bit(REL_HWHEEL, input->relbit);
1254 map_rel(REL_HWHEEL_HI_RES);
1255 break;
1256 case 0x23d: map_key_clear(KEY_EDIT); break;
1257 case 0x25f: map_key_clear(KEY_CANCEL); break;
1258 case 0x269: map_key_clear(KEY_INSERT); break;
1259 case 0x26a: map_key_clear(KEY_DELETE); break;
1260 case 0x279: map_key_clear(KEY_REDO); break;
1261
1262 case 0x289: map_key_clear(KEY_REPLY); break;
1263 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1264 case 0x28c: map_key_clear(KEY_SEND); break;
1265
1266 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1267
1268 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1269
1270 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1271 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1272 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1273 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1274 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1275 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1276
1277 case 0x29f: map_key_clear(KEY_SCALE); break;
1278
1279 default: map_key_clear(KEY_UNKNOWN);
1280 }
1281 break;
1282
1283 case HID_UP_GENDEVCTRLS:
1284 switch (usage->hid) {
1285 case HID_DC_BATTERYSTRENGTH:
1286 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1287 usage->type = EV_PWR;
1288 return;
1289 }
1290 goto unknown;
1291
1292 case HID_UP_BATTERY:
1293 switch (usage->hid) {
1294 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1295 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1296 usage->type = EV_PWR;
1297 return;
1298 case HID_BAT_CHARGING:
1299 usage->type = EV_PWR;
1300 return;
1301 }
1302 goto unknown;
1303 case HID_UP_CAMERA:
1304 switch (usage->hid & HID_USAGE) {
1305 case 0x020:
1306 map_key_clear(KEY_CAMERA_FOCUS); break;
1307 case 0x021:
1308 map_key_clear(KEY_CAMERA); break;
1309 default:
1310 goto ignore;
1311 }
1312 break;
1313
1314 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1315 set_bit(EV_REP, input->evbit);
1316 switch (usage->hid & HID_USAGE) {
1317 case 0x021: map_key_clear(KEY_PRINT); break;
1318 case 0x070: map_key_clear(KEY_HP); break;
1319 case 0x071: map_key_clear(KEY_CAMERA); break;
1320 case 0x072: map_key_clear(KEY_SOUND); break;
1321 case 0x073: map_key_clear(KEY_QUESTION); break;
1322 case 0x080: map_key_clear(KEY_EMAIL); break;
1323 case 0x081: map_key_clear(KEY_CHAT); break;
1324 case 0x082: map_key_clear(KEY_SEARCH); break;
1325 case 0x083: map_key_clear(KEY_CONNECT); break;
1326 case 0x084: map_key_clear(KEY_FINANCE); break;
1327 case 0x085: map_key_clear(KEY_SPORT); break;
1328 case 0x086: map_key_clear(KEY_SHOP); break;
1329 default: goto ignore;
1330 }
1331 break;
1332
1333 case HID_UP_HPVENDOR2:
1334 set_bit(EV_REP, input->evbit);
1335 switch (usage->hid & HID_USAGE) {
1336 case 0x001: map_key_clear(KEY_MICMUTE); break;
1337 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1338 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1339 default: goto ignore;
1340 }
1341 break;
1342
1343 case HID_UP_MSVENDOR:
1344 goto ignore;
1345
1346 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1347 set_bit(EV_REP, input->evbit);
1348 goto ignore;
1349
1350 case HID_UP_LOGIVENDOR:
1351 /* intentional fallback */
1352 case HID_UP_LOGIVENDOR2:
1353 /* intentional fallback */
1354 case HID_UP_LOGIVENDOR3:
1355 goto ignore;
1356
1357 case HID_UP_PID:
1358 switch (usage->hid & HID_USAGE) {
1359 case 0xa4: map_key_clear(BTN_DEAD); break;
1360 default: goto ignore;
1361 }
1362 break;
1363
1364 default:
1365 unknown:
1366 if (field->report_size == 1) {
1367 if (field->report->type == HID_OUTPUT_REPORT) {
1368 map_led(LED_MISC);
1369 break;
1370 }
1371 map_key(BTN_MISC);
1372 break;
1373 }
1374 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1375 map_rel(REL_MISC);
1376 break;
1377 }
1378 map_abs(ABS_MISC);
1379 break;
1380 }
1381
1382 mapped:
1383 /* Mapping failed, bail out */
1384 if (!bit)
1385 return;
1386
1387 if (device->driver->input_mapped &&
1388 device->driver->input_mapped(device, hidinput, field, usage,
1389 &bit, &max) < 0) {
1390 /*
1391 * The driver indicated that no further generic handling
1392 * of the usage is desired.
1393 */
1394 return;
1395 }
1396
1397 set_bit(usage->type, input->evbit);
1398
1399 /*
1400 * This part is *really* controversial:
1401 * - HID aims at being generic so we should do our best to export
1402 * all incoming events
1403 * - HID describes what events are, so there is no reason for ABS_X
1404 * to be mapped to ABS_Y
1405 * - HID is using *_MISC+N as a default value, but nothing prevents
1406 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1407 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1408 * processing)
1409 *
1410 * If devices still want to use this (at their own risk), they will
1411 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1412 * the default should be a reliable mapping.
1413 */
1414 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1415 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1416 usage->code = find_next_zero_bit(bit,
1417 max + 1,
1418 usage->code);
1419 } else {
1420 device->status |= HID_STAT_DUP_DETECTED;
1421 goto ignore;
1422 }
1423 }
1424
1425 if (usage->code > max)
1426 goto ignore;
1427
1428 if (usage->type == EV_ABS) {
1429
1430 int a = field->logical_minimum;
1431 int b = field->logical_maximum;
1432
1433 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1434 a = field->logical_minimum = 0;
1435 b = field->logical_maximum = 255;
1436 }
1437
1438 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1439 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1440 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1441
1442 input_abs_set_res(input, usage->code,
1443 hidinput_calc_abs_res(field, usage->code));
1444
1445 /* use a larger default input buffer for MT devices */
1446 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1447 input_set_events_per_packet(input, 60);
1448 }
1449
1450 if (usage->type == EV_ABS &&
1451 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1452 int i;
1453 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1454 input_set_abs_params(input, i, -1, 1, 0, 0);
1455 set_bit(i, input->absbit);
1456 }
1457 if (usage->hat_dir && !field->dpad)
1458 field->dpad = usage->code;
1459 }
1460
1461 /* for those devices which produce Consumer volume usage as relative,
1462 * we emulate pressing volumeup/volumedown appropriate number of times
1463 * in hidinput_hid_event()
1464 */
1465 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1466 (usage->code == ABS_VOLUME)) {
1467 set_bit(KEY_VOLUMEUP, input->keybit);
1468 set_bit(KEY_VOLUMEDOWN, input->keybit);
1469 }
1470
1471 if (usage->type == EV_KEY) {
1472 set_bit(EV_MSC, input->evbit);
1473 set_bit(MSC_SCAN, input->mscbit);
1474 }
1475
1476 return;
1477
1478 ignore:
1479 usage->type = 0;
1480 usage->code = 0;
1481 }
1482
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1483 static void hidinput_handle_scroll(struct hid_usage *usage,
1484 struct input_dev *input,
1485 __s32 value)
1486 {
1487 int code;
1488 int hi_res, lo_res;
1489
1490 if (value == 0)
1491 return;
1492
1493 if (usage->code == REL_WHEEL_HI_RES)
1494 code = REL_WHEEL;
1495 else
1496 code = REL_HWHEEL;
1497
1498 /*
1499 * Windows reports one wheel click as value 120. Where a high-res
1500 * scroll wheel is present, a fraction of 120 is reported instead.
1501 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1502 * adhere to the 120 expectation.
1503 */
1504 hi_res = value * 120/usage->resolution_multiplier;
1505
1506 usage->wheel_accumulated += hi_res;
1507 lo_res = usage->wheel_accumulated/120;
1508 if (lo_res)
1509 usage->wheel_accumulated -= lo_res * 120;
1510
1511 input_event(input, EV_REL, code, lo_res);
1512 input_event(input, EV_REL, usage->code, hi_res);
1513 }
1514
hid_report_release_tool(struct hid_report * report,struct input_dev * input,unsigned int tool)1515 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1516 unsigned int tool)
1517 {
1518 /* if the given tool is not currently reported, ignore */
1519 if (!test_bit(tool, input->key))
1520 return;
1521
1522 /*
1523 * if the given tool was previously set, release it,
1524 * release any TOUCH and send an EV_SYN
1525 */
1526 input_event(input, EV_KEY, BTN_TOUCH, 0);
1527 input_event(input, EV_KEY, tool, 0);
1528 input_event(input, EV_SYN, SYN_REPORT, 0);
1529
1530 report->tool = 0;
1531 }
1532
hid_report_set_tool(struct hid_report * report,struct input_dev * input,unsigned int new_tool)1533 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1534 unsigned int new_tool)
1535 {
1536 if (report->tool != new_tool)
1537 hid_report_release_tool(report, input, report->tool);
1538
1539 input_event(input, EV_KEY, new_tool, 1);
1540 report->tool = new_tool;
1541 }
1542
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1543 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1544 {
1545 struct input_dev *input;
1546 struct hid_report *report = field->report;
1547 unsigned *quirks = &hid->quirks;
1548
1549 if (!usage->type)
1550 return;
1551
1552 if (usage->type == EV_PWR) {
1553 hidinput_update_battery(hid, usage->hid, value);
1554 return;
1555 }
1556
1557 if (!field->hidinput)
1558 return;
1559
1560 input = field->hidinput->input;
1561
1562 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1563 int hat_dir = usage->hat_dir;
1564 if (!hat_dir)
1565 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1566 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1567 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1568 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1569 return;
1570 }
1571
1572 /*
1573 * Ignore out-of-range values as per HID specification,
1574 * section 5.10 and 6.2.25, when NULL state bit is present.
1575 * When it's not, clamp the value to match Microsoft's input
1576 * driver as mentioned in "Required HID usages for digitizers":
1577 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1578 *
1579 * The logical_minimum < logical_maximum check is done so that we
1580 * don't unintentionally discard values sent by devices which
1581 * don't specify logical min and max.
1582 */
1583 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1584 field->logical_minimum < field->logical_maximum) {
1585 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1586 (value < field->logical_minimum ||
1587 value > field->logical_maximum)) {
1588 dbg_hid("Ignoring out-of-range value %x\n", value);
1589 return;
1590 }
1591 value = clamp(value,
1592 field->logical_minimum,
1593 field->logical_maximum);
1594 }
1595
1596 switch (usage->hid) {
1597 case HID_DG_ERASER:
1598 report->tool_active |= !!value;
1599
1600 /*
1601 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1602 * to accommodate for devices not following the spec.
1603 */
1604 if (value)
1605 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1606 else if (report->tool != BTN_TOOL_RUBBER)
1607 /* value is off, tool is not rubber, ignore */
1608 return;
1609 else if (*quirks & HID_QUIRK_NOINVERT &&
1610 !test_bit(BTN_TOUCH, input->key)) {
1611 /*
1612 * There is no invert to release the tool, let hid_input
1613 * send BTN_TOUCH with scancode and release the tool after.
1614 */
1615 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1616 return;
1617 }
1618
1619 /* let hid-input set BTN_TOUCH */
1620 break;
1621
1622 case HID_DG_INVERT:
1623 report->tool_active |= !!value;
1624
1625 /*
1626 * If invert is set, we store BTN_TOOL_RUBBER.
1627 */
1628 if (value)
1629 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1630 else if (!report->tool_active)
1631 /* tool_active not set means Invert and Eraser are not set */
1632 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1633
1634 /* no further processing */
1635 return;
1636
1637 case HID_DG_INRANGE:
1638 report->tool_active |= !!value;
1639
1640 if (report->tool_active) {
1641 /*
1642 * if tool is not set but is marked as active,
1643 * assume ours
1644 */
1645 if (!report->tool)
1646 report->tool = usage->code;
1647
1648 /* drivers may have changed the value behind our back, resend it */
1649 hid_report_set_tool(report, input, report->tool);
1650 } else {
1651 hid_report_release_tool(report, input, usage->code);
1652 }
1653
1654 /* reset tool_active for the next event */
1655 report->tool_active = false;
1656
1657 /* no further processing */
1658 return;
1659
1660 case HID_DG_TIPSWITCH:
1661 report->tool_active |= !!value;
1662
1663 /* if tool is set to RUBBER we should ignore the current value */
1664 if (report->tool == BTN_TOOL_RUBBER)
1665 return;
1666
1667 break;
1668
1669 case HID_DG_TIPPRESSURE:
1670 if (*quirks & HID_QUIRK_NOTOUCH) {
1671 int a = field->logical_minimum;
1672 int b = field->logical_maximum;
1673
1674 if (value > a + ((b - a) >> 3)) {
1675 input_event(input, EV_KEY, BTN_TOUCH, 1);
1676 report->tool_active = true;
1677 }
1678 }
1679 break;
1680
1681 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1682 dbg_hid("Maximum Effects - %d\n",value);
1683 return;
1684
1685 case HID_UP_PID | 0x7fUL:
1686 dbg_hid("PID Pool Report\n");
1687 return;
1688 }
1689
1690 switch (usage->type) {
1691 case EV_KEY:
1692 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1693 return;
1694 break;
1695
1696 case EV_REL:
1697 if (usage->code == REL_WHEEL_HI_RES ||
1698 usage->code == REL_HWHEEL_HI_RES) {
1699 hidinput_handle_scroll(usage, input, value);
1700 return;
1701 }
1702 break;
1703
1704 case EV_ABS:
1705 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1706 usage->code == ABS_VOLUME) {
1707 int count = abs(value);
1708 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1709 int i;
1710
1711 for (i = 0; i < count; i++) {
1712 input_event(input, EV_KEY, direction, 1);
1713 input_sync(input);
1714 input_event(input, EV_KEY, direction, 0);
1715 input_sync(input);
1716 }
1717 return;
1718
1719 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1720 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1721 value = field->logical_maximum - value;
1722 break;
1723 }
1724
1725 /*
1726 * Ignore reports for absolute data if the data didn't change. This is
1727 * not only an optimization but also fixes 'dead' key reports. Some
1728 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1729 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1730 * can only have one of them physically available. The 'dead' keys
1731 * report constant 0. As all map to the same keycode, they'd confuse
1732 * the input layer. If we filter the 'dead' keys on the HID level, we
1733 * skip the keycode translation and only forward real events.
1734 */
1735 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1736 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1737 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1738 usage->usage_index < field->maxusage &&
1739 value == field->value[usage->usage_index])
1740 return;
1741
1742 /* report the usage code as scancode if the key status has changed */
1743 if (usage->type == EV_KEY &&
1744 (!test_bit(usage->code, input->key)) == value)
1745 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1746
1747 input_event(input, usage->type, usage->code, value);
1748
1749 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1750 usage->type == EV_KEY && value) {
1751 input_sync(input);
1752 input_event(input, usage->type, usage->code, 0);
1753 }
1754 }
1755
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1756 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1757 {
1758 struct hid_input *hidinput;
1759
1760 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1761 return;
1762
1763 list_for_each_entry(hidinput, &hid->inputs, list)
1764 input_sync(hidinput->input);
1765 }
1766 EXPORT_SYMBOL_GPL(hidinput_report_event);
1767
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1768 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1769 unsigned int code, struct hid_field **field)
1770 {
1771 struct hid_report *report;
1772 int i, j;
1773
1774 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1775 for (i = 0; i < report->maxfield; i++) {
1776 *field = report->field[i];
1777 for (j = 0; j < (*field)->maxusage; j++)
1778 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1779 return j;
1780 }
1781 }
1782 return -1;
1783 }
1784
hidinput_get_led_field(struct hid_device * hid)1785 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1786 {
1787 struct hid_report *report;
1788 struct hid_field *field;
1789 int i, j;
1790
1791 list_for_each_entry(report,
1792 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1793 list) {
1794 for (i = 0; i < report->maxfield; i++) {
1795 field = report->field[i];
1796 for (j = 0; j < field->maxusage; j++)
1797 if (field->usage[j].type == EV_LED)
1798 return field;
1799 }
1800 }
1801 return NULL;
1802 }
1803 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1804
hidinput_count_leds(struct hid_device * hid)1805 unsigned int hidinput_count_leds(struct hid_device *hid)
1806 {
1807 struct hid_report *report;
1808 struct hid_field *field;
1809 int i, j;
1810 unsigned int count = 0;
1811
1812 list_for_each_entry(report,
1813 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1814 list) {
1815 for (i = 0; i < report->maxfield; i++) {
1816 field = report->field[i];
1817 for (j = 0; j < field->maxusage; j++)
1818 if (field->usage[j].type == EV_LED &&
1819 field->value[j])
1820 count += 1;
1821 }
1822 }
1823 return count;
1824 }
1825 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1826
hidinput_led_worker(struct work_struct * work)1827 static void hidinput_led_worker(struct work_struct *work)
1828 {
1829 struct hid_device *hid = container_of(work, struct hid_device,
1830 led_work);
1831 struct hid_field *field;
1832 struct hid_report *report;
1833 int ret;
1834 u32 len;
1835 __u8 *buf;
1836
1837 field = hidinput_get_led_field(hid);
1838 if (!field)
1839 return;
1840
1841 /*
1842 * field->report is accessed unlocked regarding HID core. So there might
1843 * be another incoming SET-LED request from user-space, which changes
1844 * the LED state while we assemble our outgoing buffer. However, this
1845 * doesn't matter as hid_output_report() correctly converts it into a
1846 * boolean value no matter what information is currently set on the LED
1847 * field (even garbage). So the remote device will always get a valid
1848 * request.
1849 * And in case we send a wrong value, a next led worker is spawned
1850 * for every SET-LED request so the following worker will send the
1851 * correct value, guaranteed!
1852 */
1853
1854 report = field->report;
1855
1856 /* use custom SET_REPORT request if possible (asynchronous) */
1857 if (hid->ll_driver->request)
1858 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1859
1860 /* fall back to generic raw-output-report */
1861 len = hid_report_len(report);
1862 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1863 if (!buf)
1864 return;
1865
1866 hid_output_report(report, buf);
1867 /* synchronous output report */
1868 ret = hid_hw_output_report(hid, buf, len);
1869 if (ret == -ENOSYS)
1870 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1871 HID_REQ_SET_REPORT);
1872 kfree(buf);
1873 }
1874
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1875 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1876 unsigned int code, int value)
1877 {
1878 struct hid_device *hid = input_get_drvdata(dev);
1879 struct hid_field *field;
1880 int offset;
1881
1882 if (type == EV_FF)
1883 return input_ff_event(dev, type, code, value);
1884
1885 if (type != EV_LED)
1886 return -1;
1887
1888 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1889 hid_warn(dev, "event field not found\n");
1890 return -1;
1891 }
1892
1893 hid_set_field(field, offset, value);
1894
1895 schedule_work(&hid->led_work);
1896 return 0;
1897 }
1898
hidinput_open(struct input_dev * dev)1899 static int hidinput_open(struct input_dev *dev)
1900 {
1901 struct hid_device *hid = input_get_drvdata(dev);
1902
1903 return hid_hw_open(hid);
1904 }
1905
hidinput_close(struct input_dev * dev)1906 static void hidinput_close(struct input_dev *dev)
1907 {
1908 struct hid_device *hid = input_get_drvdata(dev);
1909
1910 hid_hw_close(hid);
1911 }
1912
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1913 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1914 struct hid_report *report, bool use_logical_max)
1915 {
1916 struct hid_usage *usage;
1917 bool update_needed = false;
1918 bool get_report_completed = false;
1919 int i, j;
1920
1921 if (report->maxfield == 0)
1922 return false;
1923
1924 for (i = 0; i < report->maxfield; i++) {
1925 __s32 value = use_logical_max ?
1926 report->field[i]->logical_maximum :
1927 report->field[i]->logical_minimum;
1928
1929 /* There is no good reason for a Resolution
1930 * Multiplier to have a count other than 1.
1931 * Ignore that case.
1932 */
1933 if (report->field[i]->report_count != 1)
1934 continue;
1935
1936 for (j = 0; j < report->field[i]->maxusage; j++) {
1937 usage = &report->field[i]->usage[j];
1938
1939 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1940 continue;
1941
1942 /*
1943 * If we have more than one feature within this
1944 * report we need to fill in the bits from the
1945 * others before we can overwrite the ones for the
1946 * Resolution Multiplier.
1947 *
1948 * But if we're not allowed to read from the device,
1949 * we just bail. Such a device should not exist
1950 * anyway.
1951 */
1952 if (!get_report_completed && report->maxfield > 1) {
1953 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1954 return update_needed;
1955
1956 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1957 hid_hw_wait(hid);
1958 get_report_completed = true;
1959 }
1960
1961 report->field[i]->value[j] = value;
1962 update_needed = true;
1963 }
1964 }
1965
1966 return update_needed;
1967 }
1968
hidinput_change_resolution_multipliers(struct hid_device * hid)1969 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1970 {
1971 struct hid_report_enum *rep_enum;
1972 struct hid_report *rep;
1973 int ret;
1974
1975 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1976 list_for_each_entry(rep, &rep_enum->report_list, list) {
1977 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1978 rep, true);
1979
1980 if (update_needed) {
1981 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1982 if (ret) {
1983 __hidinput_change_resolution_multipliers(hid,
1984 rep, false);
1985 return;
1986 }
1987 }
1988 }
1989
1990 /* refresh our structs */
1991 hid_setup_resolution_multiplier(hid);
1992 }
1993
report_features(struct hid_device * hid)1994 static void report_features(struct hid_device *hid)
1995 {
1996 struct hid_driver *drv = hid->driver;
1997 struct hid_report_enum *rep_enum;
1998 struct hid_report *rep;
1999 struct hid_usage *usage;
2000 int i, j;
2001
2002 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2003 list_for_each_entry(rep, &rep_enum->report_list, list)
2004 for (i = 0; i < rep->maxfield; i++) {
2005 /* Ignore if report count is out of bounds. */
2006 if (rep->field[i]->report_count < 1)
2007 continue;
2008
2009 for (j = 0; j < rep->field[i]->maxusage; j++) {
2010 usage = &rep->field[i]->usage[j];
2011
2012 /* Verify if Battery Strength feature is available */
2013 if (usage->hid == HID_DC_BATTERYSTRENGTH)
2014 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2015 rep->field[i], false);
2016
2017 if (drv->feature_mapping)
2018 drv->feature_mapping(hid, rep->field[i], usage);
2019 }
2020 }
2021 }
2022
hidinput_allocate(struct hid_device * hid,unsigned int application)2023 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2024 unsigned int application)
2025 {
2026 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2027 struct input_dev *input_dev = input_allocate_device();
2028 const char *suffix = NULL;
2029 size_t suffix_len, name_len;
2030
2031 if (!hidinput || !input_dev)
2032 goto fail;
2033
2034 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2035 hid->maxapplication > 1) {
2036 switch (application) {
2037 case HID_GD_KEYBOARD:
2038 suffix = "Keyboard";
2039 break;
2040 case HID_GD_KEYPAD:
2041 suffix = "Keypad";
2042 break;
2043 case HID_GD_MOUSE:
2044 suffix = "Mouse";
2045 break;
2046 case HID_DG_PEN:
2047 /*
2048 * yes, there is an issue here:
2049 * DG_PEN -> "Stylus"
2050 * DG_STYLUS -> "Pen"
2051 * But changing this now means users with config snippets
2052 * will have to change it and the test suite will not be happy.
2053 */
2054 suffix = "Stylus";
2055 break;
2056 case HID_DG_STYLUS:
2057 suffix = "Pen";
2058 break;
2059 case HID_DG_TOUCHSCREEN:
2060 suffix = "Touchscreen";
2061 break;
2062 case HID_DG_TOUCHPAD:
2063 suffix = "Touchpad";
2064 break;
2065 case HID_GD_SYSTEM_CONTROL:
2066 suffix = "System Control";
2067 break;
2068 case HID_CP_CONSUMER_CONTROL:
2069 suffix = "Consumer Control";
2070 break;
2071 case HID_GD_WIRELESS_RADIO_CTLS:
2072 suffix = "Wireless Radio Control";
2073 break;
2074 case HID_GD_SYSTEM_MULTIAXIS:
2075 suffix = "System Multi Axis";
2076 break;
2077 default:
2078 break;
2079 }
2080 }
2081
2082 if (suffix) {
2083 name_len = strlen(hid->name);
2084 suffix_len = strlen(suffix);
2085 if ((name_len < suffix_len) ||
2086 strcmp(hid->name + name_len - suffix_len, suffix)) {
2087 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2088 hid->name, suffix);
2089 if (!hidinput->name)
2090 goto fail;
2091 }
2092 }
2093
2094 input_set_drvdata(input_dev, hid);
2095 input_dev->event = hidinput_input_event;
2096 input_dev->open = hidinput_open;
2097 input_dev->close = hidinput_close;
2098 input_dev->setkeycode = hidinput_setkeycode;
2099 input_dev->getkeycode = hidinput_getkeycode;
2100
2101 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2102 input_dev->phys = hid->phys;
2103 input_dev->uniq = hid->uniq;
2104 input_dev->id.bustype = hid->bus;
2105 input_dev->id.vendor = hid->vendor;
2106 input_dev->id.product = hid->product;
2107 input_dev->id.version = hid->version;
2108 input_dev->dev.parent = &hid->dev;
2109
2110 hidinput->input = input_dev;
2111 hidinput->application = application;
2112 list_add_tail(&hidinput->list, &hid->inputs);
2113
2114 INIT_LIST_HEAD(&hidinput->reports);
2115
2116 return hidinput;
2117
2118 fail:
2119 kfree(hidinput);
2120 input_free_device(input_dev);
2121 hid_err(hid, "Out of memory during hid input probe\n");
2122 return NULL;
2123 }
2124
hidinput_has_been_populated(struct hid_input * hidinput)2125 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2126 {
2127 int i;
2128 unsigned long r = 0;
2129
2130 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2131 r |= hidinput->input->evbit[i];
2132
2133 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2134 r |= hidinput->input->keybit[i];
2135
2136 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2137 r |= hidinput->input->relbit[i];
2138
2139 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2140 r |= hidinput->input->absbit[i];
2141
2142 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2143 r |= hidinput->input->mscbit[i];
2144
2145 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2146 r |= hidinput->input->ledbit[i];
2147
2148 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2149 r |= hidinput->input->sndbit[i];
2150
2151 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2152 r |= hidinput->input->ffbit[i];
2153
2154 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2155 r |= hidinput->input->swbit[i];
2156
2157 return !!r;
2158 }
2159
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)2160 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2161 struct hid_input *hidinput)
2162 {
2163 struct hid_report *report;
2164 int i, k;
2165
2166 list_del(&hidinput->list);
2167 input_free_device(hidinput->input);
2168 kfree(hidinput->name);
2169
2170 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2171 if (k == HID_OUTPUT_REPORT &&
2172 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2173 continue;
2174
2175 list_for_each_entry(report, &hid->report_enum[k].report_list,
2176 list) {
2177
2178 for (i = 0; i < report->maxfield; i++)
2179 if (report->field[i]->hidinput == hidinput)
2180 report->field[i]->hidinput = NULL;
2181 }
2182 }
2183
2184 kfree(hidinput);
2185 }
2186
hidinput_match(struct hid_report * report)2187 static struct hid_input *hidinput_match(struct hid_report *report)
2188 {
2189 struct hid_device *hid = report->device;
2190 struct hid_input *hidinput;
2191
2192 list_for_each_entry(hidinput, &hid->inputs, list) {
2193 if (hidinput->report &&
2194 hidinput->report->id == report->id)
2195 return hidinput;
2196 }
2197
2198 return NULL;
2199 }
2200
hidinput_match_application(struct hid_report * report)2201 static struct hid_input *hidinput_match_application(struct hid_report *report)
2202 {
2203 struct hid_device *hid = report->device;
2204 struct hid_input *hidinput;
2205
2206 list_for_each_entry(hidinput, &hid->inputs, list) {
2207 if (hidinput->application == report->application)
2208 return hidinput;
2209
2210 /*
2211 * Keep SystemControl and ConsumerControl applications together
2212 * with the main keyboard, if present.
2213 */
2214 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2215 report->application == HID_CP_CONSUMER_CONTROL) &&
2216 hidinput->application == HID_GD_KEYBOARD) {
2217 return hidinput;
2218 }
2219 }
2220
2221 return NULL;
2222 }
2223
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)2224 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2225 struct hid_report *report)
2226 {
2227 int i, j, k;
2228 int first_field_index = 0;
2229 int slot_collection_index = -1;
2230 int prev_collection_index = -1;
2231 unsigned int slot_idx = 0;
2232 struct hid_field *field;
2233
2234 /*
2235 * First tag all the fields that are part of a slot,
2236 * a slot needs to have one Contact ID in the collection
2237 */
2238 for (i = 0; i < report->maxfield; i++) {
2239 field = report->field[i];
2240
2241 /* ignore fields without usage */
2242 if (field->maxusage < 1)
2243 continue;
2244
2245 /*
2246 * janitoring when collection_index changes
2247 */
2248 if (prev_collection_index != field->usage->collection_index) {
2249 prev_collection_index = field->usage->collection_index;
2250 first_field_index = i;
2251 }
2252
2253 /*
2254 * if we already found a Contact ID in the collection,
2255 * tag and continue to the next.
2256 */
2257 if (slot_collection_index == field->usage->collection_index) {
2258 field->slot_idx = slot_idx;
2259 continue;
2260 }
2261
2262 /* check if the current field has Contact ID */
2263 for (j = 0; j < field->maxusage; j++) {
2264 if (field->usage[j].hid == HID_DG_CONTACTID) {
2265 slot_collection_index = field->usage->collection_index;
2266 slot_idx++;
2267
2268 /*
2269 * mark all previous fields and this one in the
2270 * current collection to be slotted.
2271 */
2272 for (k = first_field_index; k <= i; k++)
2273 report->field[k]->slot_idx = slot_idx;
2274 break;
2275 }
2276 }
2277 }
2278
2279 for (i = 0; i < report->maxfield; i++)
2280 for (j = 0; j < report->field[i]->maxusage; j++)
2281 hidinput_configure_usage(hidinput, report->field[i],
2282 report->field[i]->usage + j,
2283 j);
2284 }
2285
2286 /*
2287 * Register the input device; print a message.
2288 * Configure the input layer interface
2289 * Read all reports and initialize the absolute field values.
2290 */
2291
hidinput_connect(struct hid_device * hid,unsigned int force)2292 int hidinput_connect(struct hid_device *hid, unsigned int force)
2293 {
2294 struct hid_driver *drv = hid->driver;
2295 struct hid_report *report;
2296 struct hid_input *next, *hidinput = NULL;
2297 unsigned int application;
2298 int i, k;
2299
2300 INIT_LIST_HEAD(&hid->inputs);
2301 INIT_WORK(&hid->led_work, hidinput_led_worker);
2302
2303 hid->status &= ~HID_STAT_DUP_DETECTED;
2304
2305 if (!force) {
2306 for (i = 0; i < hid->maxcollection; i++) {
2307 struct hid_collection *col = &hid->collection[i];
2308 if (col->type == HID_COLLECTION_APPLICATION ||
2309 col->type == HID_COLLECTION_PHYSICAL)
2310 if (IS_INPUT_APPLICATION(col->usage))
2311 break;
2312 }
2313
2314 if (i == hid->maxcollection)
2315 return -1;
2316 }
2317
2318 report_features(hid);
2319
2320 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2321 if (k == HID_OUTPUT_REPORT &&
2322 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2323 continue;
2324
2325 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2326
2327 if (!report->maxfield)
2328 continue;
2329
2330 application = report->application;
2331
2332 /*
2333 * Find the previous hidinput report attached
2334 * to this report id.
2335 */
2336 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2337 hidinput = hidinput_match(report);
2338 else if (hid->maxapplication > 1 &&
2339 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2340 hidinput = hidinput_match_application(report);
2341
2342 if (!hidinput) {
2343 hidinput = hidinput_allocate(hid, application);
2344 if (!hidinput)
2345 goto out_unwind;
2346 }
2347
2348 hidinput_configure_usages(hidinput, report);
2349
2350 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2351 hidinput->report = report;
2352
2353 list_add_tail(&report->hidinput_list,
2354 &hidinput->reports);
2355 }
2356 }
2357
2358 hidinput_change_resolution_multipliers(hid);
2359
2360 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2361 if (drv->input_configured &&
2362 drv->input_configured(hid, hidinput))
2363 goto out_unwind;
2364
2365 if (!hidinput_has_been_populated(hidinput)) {
2366 /* no need to register an input device not populated */
2367 hidinput_cleanup_hidinput(hid, hidinput);
2368 continue;
2369 }
2370
2371 if (input_register_device(hidinput->input))
2372 goto out_unwind;
2373 hidinput->registered = true;
2374 }
2375
2376 if (list_empty(&hid->inputs)) {
2377 hid_dbg(hid, "No inputs registered, leaving\n");
2378 goto out_unwind;
2379 }
2380
2381 if (hid->status & HID_STAT_DUP_DETECTED)
2382 hid_dbg(hid,
2383 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2384
2385 return 0;
2386
2387 out_unwind:
2388 /* unwind the ones we already registered */
2389 hidinput_disconnect(hid);
2390
2391 return -1;
2392 }
2393 EXPORT_SYMBOL_GPL(hidinput_connect);
2394
hidinput_disconnect(struct hid_device * hid)2395 void hidinput_disconnect(struct hid_device *hid)
2396 {
2397 struct hid_input *hidinput, *next;
2398
2399 hidinput_cleanup_battery(hid);
2400
2401 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2402 list_del(&hidinput->list);
2403 if (hidinput->registered)
2404 input_unregister_device(hidinput->input);
2405 else
2406 input_free_device(hidinput->input);
2407 kfree(hidinput->name);
2408 kfree(hidinput);
2409 }
2410
2411 /* led_work is spawned by input_dev callbacks, but doesn't access the
2412 * parent input_dev at all. Once all input devices are removed, we
2413 * know that led_work will never get restarted, so we can cancel it
2414 * synchronously and are safe. */
2415 cancel_work_sync(&hid->led_work);
2416 }
2417 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2418
hidinput_reset_resume(struct hid_device * hid)2419 void hidinput_reset_resume(struct hid_device *hid)
2420 {
2421 /* renegotiate host-device shared state after reset */
2422 hidinput_change_resolution_multipliers(hid);
2423 }
2424 EXPORT_SYMBOL_GPL(hidinput_reset_resume);
2425
2426 #ifdef CONFIG_HID_KUNIT_TEST
2427 #include "hid-input-test.c"
2428 #endif
2429