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 #define HID_BATTERY_QUIRK_DYNAMIC (1 << 4) /* report present only after life signs */
358
359 static const struct hid_device_id hid_battery_quirks[] = {
360 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
361 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
362 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
363 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
364 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
365 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
366 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
367 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
368 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
369 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
370 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
371 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
372 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
373 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
374 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
375 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
376 USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
377 HID_BATTERY_QUIRK_IGNORE },
378 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
379 USB_DEVICE_ID_ELECOM_BM084),
380 HID_BATTERY_QUIRK_IGNORE },
381 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
382 USB_DEVICE_ID_SYMBOL_SCANNER_3),
383 HID_BATTERY_QUIRK_IGNORE },
384 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
385 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
386 HID_BATTERY_QUIRK_IGNORE },
387 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
388 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
389 HID_BATTERY_QUIRK_IGNORE },
390 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
391 HID_BATTERY_QUIRK_AVOID_QUERY },
392 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
393 HID_BATTERY_QUIRK_AVOID_QUERY },
394 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
395 HID_BATTERY_QUIRK_AVOID_QUERY },
396 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
397 HID_BATTERY_QUIRK_AVOID_QUERY },
398 /*
399 * Elan HID touchscreens seem to all report a non present battery,
400 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
401 */
402 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC },
403 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC },
404 {}
405 };
406
find_battery_quirk(struct hid_device * hdev)407 static unsigned find_battery_quirk(struct hid_device *hdev)
408 {
409 unsigned quirks = 0;
410 const struct hid_device_id *match;
411
412 match = hid_match_id(hdev, hid_battery_quirks);
413 if (match != NULL)
414 quirks = match->driver_data;
415
416 return quirks;
417 }
418
hidinput_scale_battery_capacity(struct hid_device * dev,int value)419 static int hidinput_scale_battery_capacity(struct hid_device *dev,
420 int value)
421 {
422 if (dev->battery_min < dev->battery_max &&
423 value >= dev->battery_min && value <= dev->battery_max)
424 value = ((value - dev->battery_min) * 100) /
425 (dev->battery_max - dev->battery_min);
426
427 return value;
428 }
429
hidinput_query_battery_capacity(struct hid_device * dev)430 static int hidinput_query_battery_capacity(struct hid_device *dev)
431 {
432 u8 *buf;
433 int ret;
434
435 buf = kmalloc(4, GFP_KERNEL);
436 if (!buf)
437 return -ENOMEM;
438
439 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
440 dev->battery_report_type, HID_REQ_GET_REPORT);
441 if (ret < 2) {
442 kfree(buf);
443 return -ENODATA;
444 }
445
446 ret = hidinput_scale_battery_capacity(dev, buf[1]);
447 kfree(buf);
448 return ret;
449 }
450
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)451 static int hidinput_get_battery_property(struct power_supply *psy,
452 enum power_supply_property prop,
453 union power_supply_propval *val)
454 {
455 struct hid_device *dev = power_supply_get_drvdata(psy);
456 int value;
457 int ret = 0;
458
459 switch (prop) {
460 case POWER_SUPPLY_PROP_ONLINE:
461 val->intval = 1;
462 break;
463
464 case POWER_SUPPLY_PROP_PRESENT:
465 val->intval = dev->battery_present;
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_obj(*psy_desc);
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_present = (quirks & HID_BATTERY_QUIRK_DYNAMIC) ? false : true;
581
582 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
583 if (IS_ERR(dev->battery)) {
584 error = PTR_ERR(dev->battery);
585 hid_warn(dev, "can't register power supply: %d\n", error);
586 goto err_free_name;
587 }
588
589 power_supply_powers(dev->battery, &dev->dev);
590 return 0;
591
592 err_free_name:
593 kfree(psy_desc->name);
594 err_free_mem:
595 kfree(psy_desc);
596 dev->battery = NULL;
597 return error;
598 }
599
hidinput_cleanup_battery(struct hid_device * dev)600 static void hidinput_cleanup_battery(struct hid_device *dev)
601 {
602 const struct power_supply_desc *psy_desc;
603
604 if (!dev->battery)
605 return;
606
607 psy_desc = dev->battery->desc;
608 power_supply_unregister(dev->battery);
609 kfree(psy_desc->name);
610 kfree(psy_desc);
611 dev->battery = NULL;
612 }
613
hidinput_update_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)614 static bool hidinput_update_battery_charge_status(struct hid_device *dev,
615 unsigned int usage, int value)
616 {
617 switch (usage) {
618 case HID_BAT_CHARGING:
619 dev->battery_charge_status = value ?
620 POWER_SUPPLY_STATUS_CHARGING :
621 POWER_SUPPLY_STATUS_DISCHARGING;
622 return true;
623 }
624
625 return false;
626 }
627
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)628 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
629 int value)
630 {
631 int capacity;
632
633 if (!dev->battery)
634 return;
635
636 if (hidinput_update_battery_charge_status(dev, usage, value)) {
637 dev->battery_present = true;
638 power_supply_changed(dev->battery);
639 return;
640 }
641
642 if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
643 return;
644
645 if (value < dev->battery_min || value > dev->battery_max)
646 return;
647
648 capacity = hidinput_scale_battery_capacity(dev, value);
649
650 if (dev->battery_status != HID_BATTERY_REPORTED ||
651 capacity != dev->battery_capacity ||
652 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
653 dev->battery_present = true;
654 dev->battery_capacity = capacity;
655 dev->battery_status = HID_BATTERY_REPORTED;
656 dev->battery_ratelimit_time =
657 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
658 power_supply_changed(dev->battery);
659 }
660 }
661 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)662 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
663 struct hid_field *field, bool is_percentage)
664 {
665 return 0;
666 }
667
hidinput_cleanup_battery(struct hid_device * dev)668 static void hidinput_cleanup_battery(struct hid_device *dev)
669 {
670 }
671
hidinput_update_battery(struct hid_device * dev,unsigned int usage,int value)672 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
673 int value)
674 {
675 }
676 #endif /* CONFIG_HID_BATTERY_STRENGTH */
677
hidinput_field_in_collection(struct hid_device * device,struct hid_field * field,unsigned int type,unsigned int usage)678 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
679 unsigned int type, unsigned int usage)
680 {
681 struct hid_collection *collection;
682
683 collection = &device->collection[field->usage->collection_index];
684
685 return collection->type == type && collection->usage == usage;
686 }
687
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage,unsigned int usage_index)688 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
689 struct hid_usage *usage, unsigned int usage_index)
690 {
691 struct input_dev *input = hidinput->input;
692 struct hid_device *device = input_get_drvdata(input);
693 const struct usage_priority *usage_priority = NULL;
694 int max = 0, code;
695 unsigned int i = 0;
696 unsigned long *bit = NULL;
697
698 field->hidinput = hidinput;
699
700 if (field->flags & HID_MAIN_ITEM_CONSTANT)
701 goto ignore;
702
703 /* Ignore if report count is out of bounds. */
704 if (field->report_count < 1)
705 goto ignore;
706
707 /* only LED and HAPTIC usages are supported in output fields */
708 if (field->report_type == HID_OUTPUT_REPORT &&
709 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
710 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
711 goto ignore;
712 }
713
714 /* assign a priority based on the static list declared here */
715 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
716 if (usage->hid == hidinput_usages_priorities[i].usage) {
717 usage_priority = &hidinput_usages_priorities[i];
718
719 field->usages_priorities[usage_index] =
720 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
721 break;
722 }
723 }
724
725 /*
726 * For slotted devices, we need to also add the slot index
727 * in the priority.
728 */
729 if (usage_priority && usage_priority->global)
730 field->usages_priorities[usage_index] |=
731 usage_priority->slot_overwrite;
732 else
733 field->usages_priorities[usage_index] |=
734 (0xff - field->slot_idx) << 16;
735
736 if (device->driver->input_mapping) {
737 int ret = device->driver->input_mapping(device, hidinput, field,
738 usage, &bit, &max);
739 if (ret > 0)
740 goto mapped;
741 if (ret < 0)
742 goto ignore;
743 }
744
745 switch (usage->hid & HID_USAGE_PAGE) {
746 case HID_UP_UNDEFINED:
747 goto ignore;
748
749 case HID_UP_KEYBOARD:
750 set_bit(EV_REP, input->evbit);
751
752 if ((usage->hid & HID_USAGE) < 256) {
753 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
754 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
755 } else
756 map_key(KEY_UNKNOWN);
757
758 break;
759
760 case HID_UP_BUTTON:
761 code = ((usage->hid - 1) & HID_USAGE);
762
763 switch (field->application) {
764 case HID_GD_MOUSE:
765 case HID_GD_POINTER: code += BTN_MOUSE; break;
766 case HID_GD_JOYSTICK:
767 if (code <= 0xf)
768 code += BTN_JOYSTICK;
769 else
770 code += BTN_TRIGGER_HAPPY - 0x10;
771 break;
772 case HID_GD_GAMEPAD:
773 if (code <= 0xf)
774 code += BTN_GAMEPAD;
775 else
776 code += BTN_TRIGGER_HAPPY - 0x10;
777 break;
778 case HID_CP_CONSUMER_CONTROL:
779 if (hidinput_field_in_collection(device, field,
780 HID_COLLECTION_NAMED_ARRAY,
781 HID_CP_PROGRAMMABLEBUTTONS)) {
782 if (code <= 0x1d)
783 code += KEY_MACRO1;
784 else
785 code += BTN_TRIGGER_HAPPY - 0x1e;
786 break;
787 }
788 fallthrough;
789 default:
790 switch (field->physical) {
791 case HID_GD_MOUSE:
792 case HID_GD_POINTER: code += BTN_MOUSE; break;
793 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
794 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
795 default: code += BTN_MISC;
796 }
797 }
798
799 map_key(code);
800 break;
801
802 case HID_UP_SIMULATION:
803 switch (usage->hid & 0xffff) {
804 case 0xba: map_abs(ABS_RUDDER); break;
805 case 0xbb: map_abs(ABS_THROTTLE); break;
806 case 0xc4: map_abs(ABS_GAS); break;
807 case 0xc5: map_abs(ABS_BRAKE); break;
808 case 0xc8: map_abs(ABS_WHEEL); break;
809 default: goto ignore;
810 }
811 break;
812
813 case HID_UP_GENDESK:
814 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
815 switch (usage->hid & 0xf) {
816 case 0x1: map_key_clear(KEY_POWER); break;
817 case 0x2: map_key_clear(KEY_SLEEP); break;
818 case 0x3: map_key_clear(KEY_WAKEUP); break;
819 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
820 case 0x5: map_key_clear(KEY_MENU); break;
821 case 0x6: map_key_clear(KEY_PROG1); break;
822 case 0x7: map_key_clear(KEY_HELP); break;
823 case 0x8: map_key_clear(KEY_EXIT); break;
824 case 0x9: map_key_clear(KEY_SELECT); break;
825 case 0xa: map_key_clear(KEY_RIGHT); break;
826 case 0xb: map_key_clear(KEY_LEFT); break;
827 case 0xc: map_key_clear(KEY_UP); break;
828 case 0xd: map_key_clear(KEY_DOWN); break;
829 case 0xe: map_key_clear(KEY_POWER2); break;
830 case 0xf: map_key_clear(KEY_RESTART); break;
831 default: goto unknown;
832 }
833 break;
834 }
835
836 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
837 switch (usage->hid) {
838 case HID_GD_UP: usage->hat_dir = 1; break;
839 case HID_GD_DOWN: usage->hat_dir = 5; break;
840 case HID_GD_RIGHT: usage->hat_dir = 3; break;
841 case HID_GD_LEFT: usage->hat_dir = 7; break;
842 case HID_GD_DO_NOT_DISTURB:
843 map_key_clear(KEY_DO_NOT_DISTURB); break;
844 default: goto unknown;
845 }
846
847 if (usage->hid <= HID_GD_LEFT) {
848 if (field->dpad) {
849 map_abs(field->dpad);
850 goto ignore;
851 }
852 map_abs(ABS_HAT0X);
853 }
854 break;
855 }
856
857 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
858 switch (usage->hid & 0xf) {
859 case 0x9: map_key_clear(KEY_MICMUTE); break;
860 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
861 default: goto ignore;
862 }
863 break;
864 }
865
866 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
867 switch (usage->hid & 0xf) {
868 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
869 default: goto ignore;
870 }
871 break;
872 }
873
874 /*
875 * Some lazy vendors declare 255 usages for System Control,
876 * leading to the creation of ABS_X|Y axis and too many others.
877 * It wouldn't be a problem if joydev doesn't consider the
878 * device as a joystick then.
879 */
880 if (field->application == HID_GD_SYSTEM_CONTROL)
881 goto ignore;
882
883 switch (usage->hid) {
884 /* These usage IDs map directly to the usage codes. */
885 case HID_GD_X: case HID_GD_Y:
886 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
887 if (field->flags & HID_MAIN_ITEM_RELATIVE)
888 map_rel(usage->hid & 0xf);
889 else
890 map_abs_clear(usage->hid & 0xf);
891 break;
892
893 case HID_GD_Z:
894 /* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */
895 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
896 map_rel(usage->hid & 0xf);
897 } else {
898 if (field->application == HID_DG_PEN ||
899 field->physical == HID_DG_PEN ||
900 field->logical == HID_DG_STYLUS ||
901 field->physical == HID_DG_STYLUS ||
902 field->application == HID_DG_DIGITIZER)
903 map_abs_clear(ABS_DISTANCE);
904 else
905 map_abs_clear(usage->hid & 0xf);
906 }
907 break;
908
909 case HID_GD_WHEEL:
910 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
911 set_bit(REL_WHEEL, input->relbit);
912 map_rel(REL_WHEEL_HI_RES);
913 } else {
914 map_abs(usage->hid & 0xf);
915 }
916 break;
917 case HID_GD_SLIDER: case HID_GD_DIAL:
918 if (field->flags & HID_MAIN_ITEM_RELATIVE)
919 map_rel(usage->hid & 0xf);
920 else
921 map_abs(usage->hid & 0xf);
922 break;
923
924 case HID_GD_HATSWITCH:
925 usage->hat_min = field->logical_minimum;
926 usage->hat_max = field->logical_maximum;
927 map_abs(ABS_HAT0X);
928 break;
929
930 case HID_GD_START: map_key_clear(BTN_START); break;
931 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
932
933 case HID_GD_RFKILL_BTN:
934 /* MS wireless radio ctl extension, also check CA */
935 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
936 map_key_clear(KEY_RFKILL);
937 /* We need to simulate the btn release */
938 field->flags |= HID_MAIN_ITEM_RELATIVE;
939 break;
940 }
941 goto unknown;
942
943 default: goto unknown;
944 }
945
946 break;
947
948 case HID_UP_LED:
949 switch (usage->hid & 0xffff) { /* HID-Value: */
950 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
951 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
952 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
953 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
954 case 0x05: map_led (LED_KANA); break; /* "Kana" */
955 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
956 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
957 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
958 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
959 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
960 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
961
962 default: goto ignore;
963 }
964 break;
965
966 case HID_UP_DIGITIZER:
967 if ((field->application & 0xff) == 0x01) /* Digitizer */
968 __set_bit(INPUT_PROP_POINTER, input->propbit);
969 else if ((field->application & 0xff) == 0x02) /* Pen */
970 __set_bit(INPUT_PROP_DIRECT, input->propbit);
971
972 switch (usage->hid & 0xff) {
973 case 0x00: /* Undefined */
974 goto ignore;
975
976 case 0x30: /* TipPressure */
977 if (!test_bit(BTN_TOUCH, input->keybit)) {
978 device->quirks |= HID_QUIRK_NOTOUCH;
979 set_bit(EV_KEY, input->evbit);
980 set_bit(BTN_TOUCH, input->keybit);
981 }
982 map_abs_clear(ABS_PRESSURE);
983 break;
984
985 case 0x32: /* InRange */
986 switch (field->physical) {
987 case HID_DG_PUCK:
988 map_key(BTN_TOOL_MOUSE);
989 break;
990 case HID_DG_FINGER:
991 map_key(BTN_TOOL_FINGER);
992 break;
993 default:
994 /*
995 * If the physical is not given,
996 * rely on the application.
997 */
998 if (!field->physical) {
999 switch (field->application) {
1000 case HID_DG_TOUCHSCREEN:
1001 case HID_DG_TOUCHPAD:
1002 map_key_clear(BTN_TOOL_FINGER);
1003 break;
1004 default:
1005 map_key_clear(BTN_TOOL_PEN);
1006 }
1007 } else {
1008 map_key(BTN_TOOL_PEN);
1009 }
1010 break;
1011 }
1012 break;
1013
1014 case 0x3b: /* Battery Strength */
1015 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1016 usage->type = EV_PWR;
1017 return;
1018
1019 case 0x3c: /* Invert */
1020 device->quirks &= ~HID_QUIRK_NOINVERT;
1021 map_key_clear(BTN_TOOL_RUBBER);
1022 break;
1023
1024 case 0x3d: /* X Tilt */
1025 map_abs_clear(ABS_TILT_X);
1026 break;
1027
1028 case 0x3e: /* Y Tilt */
1029 map_abs_clear(ABS_TILT_Y);
1030 break;
1031
1032 case 0x33: /* Touch */
1033 case 0x42: /* TipSwitch */
1034 case 0x43: /* TipSwitch2 */
1035 device->quirks &= ~HID_QUIRK_NOTOUCH;
1036 map_key_clear(BTN_TOUCH);
1037 break;
1038
1039 case 0x44: /* BarrelSwitch */
1040 map_key_clear(BTN_STYLUS);
1041 break;
1042
1043 case 0x45: /* ERASER */
1044 /*
1045 * This event is reported when eraser tip touches the surface.
1046 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1047 * by Invert if tool reports proximity or by Eraser directly.
1048 */
1049 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1050 device->quirks |= HID_QUIRK_NOINVERT;
1051 set_bit(BTN_TOOL_RUBBER, input->keybit);
1052 }
1053 map_key_clear(BTN_TOUCH);
1054 break;
1055
1056 case 0x46: /* TabletPick */
1057 case 0x5a: /* SecondaryBarrelSwitch */
1058 map_key_clear(BTN_STYLUS2);
1059 break;
1060
1061 case 0x5b: /* TransducerSerialNumber */
1062 case 0x6e: /* TransducerSerialNumber2 */
1063 map_msc(MSC_SERIAL);
1064 break;
1065
1066 default: goto unknown;
1067 }
1068 break;
1069
1070 case HID_UP_TELEPHONY:
1071 switch (usage->hid & HID_USAGE) {
1072 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1073 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1074 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1075 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1076 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1077 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1078 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1079 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1080 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1081 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1082 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1083 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1084 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1085 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1086 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1087 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1088 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1089 default: goto ignore;
1090 }
1091 break;
1092
1093 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1094 switch (usage->hid & HID_USAGE) {
1095 case 0x000: goto ignore;
1096 case 0x030: map_key_clear(KEY_POWER); break;
1097 case 0x031: map_key_clear(KEY_RESTART); break;
1098 case 0x032: map_key_clear(KEY_SLEEP); break;
1099 case 0x034: map_key_clear(KEY_SLEEP); break;
1100 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1101 case 0x036: map_key_clear(BTN_MISC); break;
1102
1103 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1104 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1105 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1106 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1107 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1108 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1109 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1110 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1111 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1112
1113 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1114 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1115 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1116 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1117 case 0x069: map_key_clear(KEY_RED); break;
1118 case 0x06a: map_key_clear(KEY_GREEN); break;
1119 case 0x06b: map_key_clear(KEY_BLUE); break;
1120 case 0x06c: map_key_clear(KEY_YELLOW); break;
1121 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1122
1123 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1124 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1125 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1126 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1127 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1128 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1129
1130 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1131 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1132 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1133
1134 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1135 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1136 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1137
1138 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1139 case 0x083: map_key_clear(KEY_LAST); break;
1140 case 0x084: map_key_clear(KEY_ENTER); break;
1141 case 0x088: map_key_clear(KEY_PC); break;
1142 case 0x089: map_key_clear(KEY_TV); break;
1143 case 0x08a: map_key_clear(KEY_WWW); break;
1144 case 0x08b: map_key_clear(KEY_DVD); break;
1145 case 0x08c: map_key_clear(KEY_PHONE); break;
1146 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1147 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1148 case 0x08f: map_key_clear(KEY_GAMES); break;
1149 case 0x090: map_key_clear(KEY_MEMO); break;
1150 case 0x091: map_key_clear(KEY_CD); break;
1151 case 0x092: map_key_clear(KEY_VCR); break;
1152 case 0x093: map_key_clear(KEY_TUNER); break;
1153 case 0x094: map_key_clear(KEY_EXIT); break;
1154 case 0x095: map_key_clear(KEY_HELP); break;
1155 case 0x096: map_key_clear(KEY_TAPE); break;
1156 case 0x097: map_key_clear(KEY_TV2); break;
1157 case 0x098: map_key_clear(KEY_SAT); break;
1158 case 0x09a: map_key_clear(KEY_PVR); break;
1159
1160 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1161 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1162 case 0x0a0: map_key_clear(KEY_VCR2); break;
1163
1164 case 0x0b0: map_key_clear(KEY_PLAY); break;
1165 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1166 case 0x0b2: map_key_clear(KEY_RECORD); break;
1167 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1168 case 0x0b4: map_key_clear(KEY_REWIND); break;
1169 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1170 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1171 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1172 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1173 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1174 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1175 case 0x0bf: map_key_clear(KEY_SLOW); break;
1176
1177 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1178 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1179
1180 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1181 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1182
1183 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1184 case 0x0e2: map_key_clear(KEY_MUTE); break;
1185 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1186 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1187 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1188 case 0x0f5: map_key_clear(KEY_SLOW); break;
1189
1190 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1191 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1192 case 0x183: map_key_clear(KEY_CONFIG); break;
1193 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1194 case 0x185: map_key_clear(KEY_EDITOR); break;
1195 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1196 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1197 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1198 case 0x189: map_key_clear(KEY_DATABASE); break;
1199 case 0x18a: map_key_clear(KEY_MAIL); break;
1200 case 0x18b: map_key_clear(KEY_NEWS); break;
1201 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1202 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1203 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1204 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1205 case 0x190: map_key_clear(KEY_JOURNAL); break;
1206 case 0x191: map_key_clear(KEY_FINANCE); break;
1207 case 0x192: map_key_clear(KEY_CALC); break;
1208 case 0x193: map_key_clear(KEY_PLAYER); break;
1209 case 0x194: map_key_clear(KEY_FILE); break;
1210 case 0x196: map_key_clear(KEY_WWW); break;
1211 case 0x199: map_key_clear(KEY_CHAT); break;
1212 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1213 case 0x19e: map_key_clear(KEY_COFFEE); break;
1214 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1215 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1216 case 0x1a3: map_key_clear(KEY_NEXT); break;
1217 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1218 case 0x1a6: map_key_clear(KEY_HELP); break;
1219 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1220 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1221 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1222 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1223 case 0x1b4: map_key_clear(KEY_FILE); break;
1224 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1225 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1226 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1227 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1228 case 0x1bd: map_key_clear(KEY_INFO); break;
1229 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1230 case 0x1cc: map_key_clear(KEY_ACTION_ON_SELECTION); break;
1231 case 0x1cd: map_key_clear(KEY_CONTEXTUAL_INSERT); break;
1232 case 0x1ce: map_key_clear(KEY_CONTEXTUAL_QUERY); break;
1233 case 0x201: map_key_clear(KEY_NEW); break;
1234 case 0x202: map_key_clear(KEY_OPEN); break;
1235 case 0x203: map_key_clear(KEY_CLOSE); break;
1236 case 0x204: map_key_clear(KEY_EXIT); break;
1237 case 0x207: map_key_clear(KEY_SAVE); break;
1238 case 0x208: map_key_clear(KEY_PRINT); break;
1239 case 0x209: map_key_clear(KEY_PROPS); break;
1240 case 0x21a: map_key_clear(KEY_UNDO); break;
1241 case 0x21b: map_key_clear(KEY_COPY); break;
1242 case 0x21c: map_key_clear(KEY_CUT); break;
1243 case 0x21d: map_key_clear(KEY_PASTE); break;
1244 case 0x21f: map_key_clear(KEY_FIND); break;
1245 case 0x221: map_key_clear(KEY_SEARCH); break;
1246 case 0x222: map_key_clear(KEY_GOTO); break;
1247 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1248 case 0x224: map_key_clear(KEY_BACK); break;
1249 case 0x225: map_key_clear(KEY_FORWARD); break;
1250 case 0x226: map_key_clear(KEY_STOP); break;
1251 case 0x227: map_key_clear(KEY_REFRESH); break;
1252 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1253 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1254 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1255 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1256 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1257 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1258 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1259 case 0x238: /* AC Pan */
1260 set_bit(REL_HWHEEL, input->relbit);
1261 map_rel(REL_HWHEEL_HI_RES);
1262 break;
1263 case 0x23d: map_key_clear(KEY_EDIT); break;
1264 case 0x25f: map_key_clear(KEY_CANCEL); break;
1265 case 0x269: map_key_clear(KEY_INSERT); break;
1266 case 0x26a: map_key_clear(KEY_DELETE); break;
1267 case 0x279: map_key_clear(KEY_REDO); break;
1268
1269 case 0x289: map_key_clear(KEY_REPLY); break;
1270 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1271 case 0x28c: map_key_clear(KEY_SEND); break;
1272
1273 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1274
1275 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1276
1277 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1278 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1279 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1280 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1281 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1282 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1283
1284 case 0x29f: map_key_clear(KEY_SCALE); break;
1285
1286 default: map_key_clear(KEY_UNKNOWN);
1287 }
1288 break;
1289
1290 case HID_UP_GENDEVCTRLS:
1291 switch (usage->hid) {
1292 case HID_DC_BATTERYSTRENGTH:
1293 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1294 usage->type = EV_PWR;
1295 return;
1296 }
1297 goto unknown;
1298
1299 case HID_UP_BATTERY:
1300 switch (usage->hid) {
1301 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1302 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1303 usage->type = EV_PWR;
1304 return;
1305 case HID_BAT_CHARGING:
1306 usage->type = EV_PWR;
1307 return;
1308 }
1309 goto unknown;
1310 case HID_UP_CAMERA:
1311 switch (usage->hid & HID_USAGE) {
1312 case 0x020:
1313 map_key_clear(KEY_CAMERA_FOCUS); break;
1314 case 0x021:
1315 map_key_clear(KEY_CAMERA); break;
1316 default:
1317 goto ignore;
1318 }
1319 break;
1320
1321 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1322 set_bit(EV_REP, input->evbit);
1323 switch (usage->hid & HID_USAGE) {
1324 case 0x021: map_key_clear(KEY_PRINT); break;
1325 case 0x070: map_key_clear(KEY_HP); break;
1326 case 0x071: map_key_clear(KEY_CAMERA); break;
1327 case 0x072: map_key_clear(KEY_SOUND); break;
1328 case 0x073: map_key_clear(KEY_QUESTION); break;
1329 case 0x080: map_key_clear(KEY_EMAIL); break;
1330 case 0x081: map_key_clear(KEY_CHAT); break;
1331 case 0x082: map_key_clear(KEY_SEARCH); break;
1332 case 0x083: map_key_clear(KEY_CONNECT); break;
1333 case 0x084: map_key_clear(KEY_FINANCE); break;
1334 case 0x085: map_key_clear(KEY_SPORT); break;
1335 case 0x086: map_key_clear(KEY_SHOP); break;
1336 default: goto ignore;
1337 }
1338 break;
1339
1340 case HID_UP_HPVENDOR2:
1341 set_bit(EV_REP, input->evbit);
1342 switch (usage->hid & HID_USAGE) {
1343 case 0x001: map_key_clear(KEY_MICMUTE); break;
1344 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1345 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1346 default: goto ignore;
1347 }
1348 break;
1349
1350 case HID_UP_MSVENDOR:
1351 goto ignore;
1352
1353 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1354 set_bit(EV_REP, input->evbit);
1355 goto ignore;
1356
1357 case HID_UP_LOGIVENDOR:
1358 /* intentional fallback */
1359 case HID_UP_LOGIVENDOR2:
1360 /* intentional fallback */
1361 case HID_UP_LOGIVENDOR3:
1362 goto ignore;
1363
1364 case HID_UP_PID:
1365 switch (usage->hid & HID_USAGE) {
1366 case 0xa4: map_key_clear(BTN_DEAD); break;
1367 default: goto ignore;
1368 }
1369 break;
1370
1371 default:
1372 unknown:
1373 if (field->report_size == 1) {
1374 if (field->report->type == HID_OUTPUT_REPORT) {
1375 map_led(LED_MISC);
1376 break;
1377 }
1378 map_key(BTN_MISC);
1379 break;
1380 }
1381 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1382 map_rel(REL_MISC);
1383 break;
1384 }
1385 map_abs(ABS_MISC);
1386 break;
1387 }
1388
1389 mapped:
1390 /* Mapping failed, bail out */
1391 if (!bit)
1392 return;
1393
1394 if (device->driver->input_mapped &&
1395 device->driver->input_mapped(device, hidinput, field, usage,
1396 &bit, &max) < 0) {
1397 /*
1398 * The driver indicated that no further generic handling
1399 * of the usage is desired.
1400 */
1401 return;
1402 }
1403
1404 set_bit(usage->type, input->evbit);
1405
1406 /*
1407 * This part is *really* controversial:
1408 * - HID aims at being generic so we should do our best to export
1409 * all incoming events
1410 * - HID describes what events are, so there is no reason for ABS_X
1411 * to be mapped to ABS_Y
1412 * - HID is using *_MISC+N as a default value, but nothing prevents
1413 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1414 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1415 * processing)
1416 *
1417 * If devices still want to use this (at their own risk), they will
1418 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1419 * the default should be a reliable mapping.
1420 */
1421 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1422 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1423 usage->code = find_next_zero_bit(bit,
1424 max + 1,
1425 usage->code);
1426 } else {
1427 device->status |= HID_STAT_DUP_DETECTED;
1428 goto ignore;
1429 }
1430 }
1431
1432 if (usage->code > max)
1433 goto ignore;
1434
1435 if (usage->type == EV_ABS) {
1436
1437 int a = field->logical_minimum;
1438 int b = field->logical_maximum;
1439
1440 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1441 a = field->logical_minimum = 0;
1442 b = field->logical_maximum = 255;
1443 }
1444
1445 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1446 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1447 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1448
1449 input_abs_set_res(input, usage->code,
1450 hidinput_calc_abs_res(field, usage->code));
1451
1452 /* use a larger default input buffer for MT devices */
1453 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1454 input_set_events_per_packet(input, 60);
1455 }
1456
1457 if (usage->type == EV_ABS &&
1458 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1459 int i;
1460 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1461 input_set_abs_params(input, i, -1, 1, 0, 0);
1462 set_bit(i, input->absbit);
1463 }
1464 if (usage->hat_dir && !field->dpad)
1465 field->dpad = usage->code;
1466 }
1467
1468 /* for those devices which produce Consumer volume usage as relative,
1469 * we emulate pressing volumeup/volumedown appropriate number of times
1470 * in hidinput_hid_event()
1471 */
1472 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1473 (usage->code == ABS_VOLUME)) {
1474 set_bit(KEY_VOLUMEUP, input->keybit);
1475 set_bit(KEY_VOLUMEDOWN, input->keybit);
1476 }
1477
1478 if (usage->type == EV_KEY) {
1479 set_bit(EV_MSC, input->evbit);
1480 set_bit(MSC_SCAN, input->mscbit);
1481 }
1482
1483 return;
1484
1485 ignore:
1486 usage->type = 0;
1487 usage->code = 0;
1488 }
1489
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1490 static void hidinput_handle_scroll(struct hid_usage *usage,
1491 struct input_dev *input,
1492 __s32 value)
1493 {
1494 int code;
1495 int hi_res, lo_res;
1496
1497 if (value == 0)
1498 return;
1499
1500 if (usage->code == REL_WHEEL_HI_RES)
1501 code = REL_WHEEL;
1502 else
1503 code = REL_HWHEEL;
1504
1505 /*
1506 * Windows reports one wheel click as value 120. Where a high-res
1507 * scroll wheel is present, a fraction of 120 is reported instead.
1508 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1509 * adhere to the 120 expectation.
1510 */
1511 hi_res = value * 120/usage->resolution_multiplier;
1512
1513 usage->wheel_accumulated += hi_res;
1514 lo_res = usage->wheel_accumulated/120;
1515 if (lo_res)
1516 usage->wheel_accumulated -= lo_res * 120;
1517
1518 input_event(input, EV_REL, code, lo_res);
1519 input_event(input, EV_REL, usage->code, hi_res);
1520 }
1521
hid_report_release_tool(struct hid_report * report,struct input_dev * input,unsigned int tool)1522 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1523 unsigned int tool)
1524 {
1525 /* if the given tool is not currently reported, ignore */
1526 if (!test_bit(tool, input->key))
1527 return;
1528
1529 /*
1530 * if the given tool was previously set, release it,
1531 * release any TOUCH and send an EV_SYN
1532 */
1533 input_event(input, EV_KEY, BTN_TOUCH, 0);
1534 input_event(input, EV_KEY, tool, 0);
1535 input_event(input, EV_SYN, SYN_REPORT, 0);
1536
1537 report->tool = 0;
1538 }
1539
hid_report_set_tool(struct hid_report * report,struct input_dev * input,unsigned int new_tool)1540 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1541 unsigned int new_tool)
1542 {
1543 if (report->tool != new_tool)
1544 hid_report_release_tool(report, input, report->tool);
1545
1546 input_event(input, EV_KEY, new_tool, 1);
1547 report->tool = new_tool;
1548 }
1549
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1550 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1551 {
1552 struct input_dev *input;
1553 struct hid_report *report = field->report;
1554 unsigned *quirks = &hid->quirks;
1555
1556 if (!usage->type)
1557 return;
1558
1559 if (usage->type == EV_PWR) {
1560 hidinput_update_battery(hid, usage->hid, value);
1561 return;
1562 }
1563
1564 if (!field->hidinput)
1565 return;
1566
1567 input = field->hidinput->input;
1568
1569 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1570 int hat_dir = usage->hat_dir;
1571 if (!hat_dir)
1572 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1573 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1574 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1575 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1576 return;
1577 }
1578
1579 /*
1580 * Ignore out-of-range values as per HID specification,
1581 * section 5.10 and 6.2.25, when NULL state bit is present.
1582 * When it's not, clamp the value to match Microsoft's input
1583 * driver as mentioned in "Required HID usages for digitizers":
1584 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1585 *
1586 * The logical_minimum < logical_maximum check is done so that we
1587 * don't unintentionally discard values sent by devices which
1588 * don't specify logical min and max.
1589 */
1590 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1591 field->logical_minimum < field->logical_maximum) {
1592 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1593 (value < field->logical_minimum ||
1594 value > field->logical_maximum)) {
1595 dbg_hid("Ignoring out-of-range value %x\n", value);
1596 return;
1597 }
1598 value = clamp(value,
1599 field->logical_minimum,
1600 field->logical_maximum);
1601 }
1602
1603 switch (usage->hid) {
1604 case HID_DG_ERASER:
1605 report->tool_active |= !!value;
1606
1607 /*
1608 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1609 * to accommodate for devices not following the spec.
1610 */
1611 if (value)
1612 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1613 else if (report->tool != BTN_TOOL_RUBBER)
1614 /* value is off, tool is not rubber, ignore */
1615 return;
1616 else if (*quirks & HID_QUIRK_NOINVERT &&
1617 !test_bit(BTN_TOUCH, input->key)) {
1618 /*
1619 * There is no invert to release the tool, let hid_input
1620 * send BTN_TOUCH with scancode and release the tool after.
1621 */
1622 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1623 return;
1624 }
1625
1626 /* let hid-input set BTN_TOUCH */
1627 break;
1628
1629 case HID_DG_INVERT:
1630 report->tool_active |= !!value;
1631
1632 /*
1633 * If invert is set, we store BTN_TOOL_RUBBER.
1634 */
1635 if (value)
1636 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1637 else if (!report->tool_active)
1638 /* tool_active not set means Invert and Eraser are not set */
1639 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1640
1641 /* no further processing */
1642 return;
1643
1644 case HID_DG_INRANGE:
1645 report->tool_active |= !!value;
1646
1647 if (report->tool_active) {
1648 /*
1649 * if tool is not set but is marked as active,
1650 * assume ours
1651 */
1652 if (!report->tool)
1653 report->tool = usage->code;
1654
1655 /* drivers may have changed the value behind our back, resend it */
1656 hid_report_set_tool(report, input, report->tool);
1657 } else {
1658 hid_report_release_tool(report, input, usage->code);
1659 }
1660
1661 /* reset tool_active for the next event */
1662 report->tool_active = false;
1663
1664 /* no further processing */
1665 return;
1666
1667 case HID_DG_TIPSWITCH:
1668 report->tool_active |= !!value;
1669
1670 /* if tool is set to RUBBER we should ignore the current value */
1671 if (report->tool == BTN_TOOL_RUBBER)
1672 return;
1673
1674 break;
1675
1676 case HID_DG_TIPPRESSURE:
1677 if (*quirks & HID_QUIRK_NOTOUCH) {
1678 int a = field->logical_minimum;
1679 int b = field->logical_maximum;
1680
1681 if (value > a + ((b - a) >> 3)) {
1682 input_event(input, EV_KEY, BTN_TOUCH, 1);
1683 report->tool_active = true;
1684 }
1685 }
1686 break;
1687
1688 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1689 dbg_hid("Maximum Effects - %d\n",value);
1690 return;
1691
1692 case HID_UP_PID | 0x7fUL:
1693 dbg_hid("PID Pool Report\n");
1694 return;
1695 }
1696
1697 switch (usage->type) {
1698 case EV_KEY:
1699 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1700 return;
1701 break;
1702
1703 case EV_REL:
1704 if (usage->code == REL_WHEEL_HI_RES ||
1705 usage->code == REL_HWHEEL_HI_RES) {
1706 hidinput_handle_scroll(usage, input, value);
1707 return;
1708 }
1709 break;
1710
1711 case EV_ABS:
1712 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1713 usage->code == ABS_VOLUME) {
1714 int count = abs(value);
1715 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1716 int i;
1717
1718 for (i = 0; i < count; i++) {
1719 input_event(input, EV_KEY, direction, 1);
1720 input_sync(input);
1721 input_event(input, EV_KEY, direction, 0);
1722 input_sync(input);
1723 }
1724 return;
1725
1726 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1727 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1728 value = field->logical_maximum - value;
1729 break;
1730 }
1731
1732 /*
1733 * Ignore reports for absolute data if the data didn't change. This is
1734 * not only an optimization but also fixes 'dead' key reports. Some
1735 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1736 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1737 * can only have one of them physically available. The 'dead' keys
1738 * report constant 0. As all map to the same keycode, they'd confuse
1739 * the input layer. If we filter the 'dead' keys on the HID level, we
1740 * skip the keycode translation and only forward real events.
1741 */
1742 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1743 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1744 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1745 usage->usage_index < field->maxusage &&
1746 value == field->value[usage->usage_index])
1747 return;
1748
1749 /* report the usage code as scancode if the key status has changed */
1750 if (usage->type == EV_KEY &&
1751 (!test_bit(usage->code, input->key)) == value)
1752 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1753
1754 input_event(input, usage->type, usage->code, value);
1755
1756 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1757 usage->type == EV_KEY && value) {
1758 input_sync(input);
1759 input_event(input, usage->type, usage->code, 0);
1760 }
1761 }
1762
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1763 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1764 {
1765 struct hid_input *hidinput;
1766
1767 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1768 return;
1769
1770 list_for_each_entry(hidinput, &hid->inputs, list)
1771 input_sync(hidinput->input);
1772 }
1773 EXPORT_SYMBOL_GPL(hidinput_report_event);
1774
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1775 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1776 unsigned int code, struct hid_field **field)
1777 {
1778 struct hid_report *report;
1779 int i, j;
1780
1781 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1782 for (i = 0; i < report->maxfield; i++) {
1783 *field = report->field[i];
1784 for (j = 0; j < (*field)->maxusage; j++)
1785 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1786 return j;
1787 }
1788 }
1789 return -1;
1790 }
1791
hidinput_get_led_field(struct hid_device * hid)1792 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1793 {
1794 struct hid_report *report;
1795 struct hid_field *field;
1796 int i, j;
1797
1798 list_for_each_entry(report,
1799 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1800 list) {
1801 for (i = 0; i < report->maxfield; i++) {
1802 field = report->field[i];
1803 for (j = 0; j < field->maxusage; j++)
1804 if (field->usage[j].type == EV_LED)
1805 return field;
1806 }
1807 }
1808 return NULL;
1809 }
1810 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1811
hidinput_count_leds(struct hid_device * hid)1812 unsigned int hidinput_count_leds(struct hid_device *hid)
1813 {
1814 struct hid_report *report;
1815 struct hid_field *field;
1816 int i, j;
1817 unsigned int count = 0;
1818
1819 list_for_each_entry(report,
1820 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1821 list) {
1822 for (i = 0; i < report->maxfield; i++) {
1823 field = report->field[i];
1824 for (j = 0; j < field->maxusage; j++)
1825 if (field->usage[j].type == EV_LED &&
1826 field->value[j])
1827 count += 1;
1828 }
1829 }
1830 return count;
1831 }
1832 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1833
hidinput_led_worker(struct work_struct * work)1834 static void hidinput_led_worker(struct work_struct *work)
1835 {
1836 struct hid_device *hid = container_of(work, struct hid_device,
1837 led_work);
1838 struct hid_field *field;
1839 struct hid_report *report;
1840 int ret;
1841 u32 len;
1842 __u8 *buf;
1843
1844 field = hidinput_get_led_field(hid);
1845 if (!field)
1846 return;
1847
1848 /*
1849 * field->report is accessed unlocked regarding HID core. So there might
1850 * be another incoming SET-LED request from user-space, which changes
1851 * the LED state while we assemble our outgoing buffer. However, this
1852 * doesn't matter as hid_output_report() correctly converts it into a
1853 * boolean value no matter what information is currently set on the LED
1854 * field (even garbage). So the remote device will always get a valid
1855 * request.
1856 * And in case we send a wrong value, a next led worker is spawned
1857 * for every SET-LED request so the following worker will send the
1858 * correct value, guaranteed!
1859 */
1860
1861 report = field->report;
1862
1863 /* use custom SET_REPORT request if possible (asynchronous) */
1864 if (hid->ll_driver->request)
1865 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1866
1867 /* fall back to generic raw-output-report */
1868 len = hid_report_len(report);
1869 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1870 if (!buf)
1871 return;
1872
1873 hid_output_report(report, buf);
1874 /* synchronous output report */
1875 ret = hid_hw_output_report(hid, buf, len);
1876 if (ret == -ENOSYS)
1877 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1878 HID_REQ_SET_REPORT);
1879 kfree(buf);
1880 }
1881
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1882 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1883 unsigned int code, int value)
1884 {
1885 struct hid_device *hid = input_get_drvdata(dev);
1886 struct hid_field *field;
1887 int offset;
1888
1889 if (type == EV_FF)
1890 return input_ff_event(dev, type, code, value);
1891
1892 if (type != EV_LED)
1893 return -1;
1894
1895 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1896 hid_warn(dev, "event field not found\n");
1897 return -1;
1898 }
1899
1900 hid_set_field(field, offset, value);
1901
1902 schedule_work(&hid->led_work);
1903 return 0;
1904 }
1905
hidinput_open(struct input_dev * dev)1906 static int hidinput_open(struct input_dev *dev)
1907 {
1908 struct hid_device *hid = input_get_drvdata(dev);
1909
1910 return hid_hw_open(hid);
1911 }
1912
hidinput_close(struct input_dev * dev)1913 static void hidinput_close(struct input_dev *dev)
1914 {
1915 struct hid_device *hid = input_get_drvdata(dev);
1916
1917 hid_hw_close(hid);
1918 }
1919
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1920 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1921 struct hid_report *report, bool use_logical_max)
1922 {
1923 struct hid_usage *usage;
1924 bool update_needed = false;
1925 bool get_report_completed = false;
1926 int i, j;
1927
1928 if (report->maxfield == 0)
1929 return false;
1930
1931 for (i = 0; i < report->maxfield; i++) {
1932 __s32 value = use_logical_max ?
1933 report->field[i]->logical_maximum :
1934 report->field[i]->logical_minimum;
1935
1936 /* There is no good reason for a Resolution
1937 * Multiplier to have a count other than 1.
1938 * Ignore that case.
1939 */
1940 if (report->field[i]->report_count != 1)
1941 continue;
1942
1943 for (j = 0; j < report->field[i]->maxusage; j++) {
1944 usage = &report->field[i]->usage[j];
1945
1946 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1947 continue;
1948
1949 /*
1950 * If we have more than one feature within this
1951 * report we need to fill in the bits from the
1952 * others before we can overwrite the ones for the
1953 * Resolution Multiplier.
1954 *
1955 * But if we're not allowed to read from the device,
1956 * we just bail. Such a device should not exist
1957 * anyway.
1958 */
1959 if (!get_report_completed && report->maxfield > 1) {
1960 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1961 return update_needed;
1962
1963 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1964 hid_hw_wait(hid);
1965 get_report_completed = true;
1966 }
1967
1968 report->field[i]->value[j] = value;
1969 update_needed = true;
1970 }
1971 }
1972
1973 return update_needed;
1974 }
1975
hidinput_change_resolution_multipliers(struct hid_device * hid)1976 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1977 {
1978 struct hid_report_enum *rep_enum;
1979 struct hid_report *rep;
1980 int ret;
1981
1982 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1983 list_for_each_entry(rep, &rep_enum->report_list, list) {
1984 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1985 rep, true);
1986
1987 if (update_needed) {
1988 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1989 if (ret) {
1990 __hidinput_change_resolution_multipliers(hid,
1991 rep, false);
1992 return;
1993 }
1994 }
1995 }
1996
1997 /* refresh our structs */
1998 hid_setup_resolution_multiplier(hid);
1999 }
2000
report_features(struct hid_device * hid)2001 static void report_features(struct hid_device *hid)
2002 {
2003 struct hid_driver *drv = hid->driver;
2004 struct hid_report_enum *rep_enum;
2005 struct hid_report *rep;
2006 struct hid_usage *usage;
2007 int i, j;
2008
2009 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2010 list_for_each_entry(rep, &rep_enum->report_list, list)
2011 for (i = 0; i < rep->maxfield; i++) {
2012 /* Ignore if report count is out of bounds. */
2013 if (rep->field[i]->report_count < 1)
2014 continue;
2015
2016 for (j = 0; j < rep->field[i]->maxusage; j++) {
2017 usage = &rep->field[i]->usage[j];
2018
2019 /* Verify if Battery Strength feature is available */
2020 if (usage->hid == HID_DC_BATTERYSTRENGTH)
2021 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2022 rep->field[i], false);
2023
2024 if (drv->feature_mapping)
2025 drv->feature_mapping(hid, rep->field[i], usage);
2026 }
2027 }
2028 }
2029
hidinput_allocate(struct hid_device * hid,unsigned int application)2030 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2031 unsigned int application)
2032 {
2033 struct hid_input *hidinput = kzalloc_obj(*hidinput);
2034 struct input_dev *input_dev = input_allocate_device();
2035 const char *suffix = NULL;
2036 size_t suffix_len, name_len;
2037
2038 if (!hidinput || !input_dev)
2039 goto fail;
2040
2041 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2042 hid->maxapplication > 1) {
2043 switch (application) {
2044 case HID_GD_KEYBOARD:
2045 suffix = "Keyboard";
2046 break;
2047 case HID_GD_KEYPAD:
2048 suffix = "Keypad";
2049 break;
2050 case HID_GD_MOUSE:
2051 suffix = "Mouse";
2052 break;
2053 case HID_DG_PEN:
2054 /*
2055 * yes, there is an issue here:
2056 * DG_PEN -> "Stylus"
2057 * DG_STYLUS -> "Pen"
2058 * But changing this now means users with config snippets
2059 * will have to change it and the test suite will not be happy.
2060 */
2061 suffix = "Stylus";
2062 break;
2063 case HID_DG_STYLUS:
2064 suffix = "Pen";
2065 break;
2066 case HID_DG_TOUCHSCREEN:
2067 suffix = "Touchscreen";
2068 break;
2069 case HID_DG_TOUCHPAD:
2070 suffix = "Touchpad";
2071 break;
2072 case HID_GD_SYSTEM_CONTROL:
2073 suffix = "System Control";
2074 break;
2075 case HID_CP_CONSUMER_CONTROL:
2076 suffix = "Consumer Control";
2077 break;
2078 case HID_GD_WIRELESS_RADIO_CTLS:
2079 suffix = "Wireless Radio Control";
2080 break;
2081 case HID_GD_SYSTEM_MULTIAXIS:
2082 suffix = "System Multi Axis";
2083 break;
2084 default:
2085 break;
2086 }
2087 }
2088
2089 if (suffix) {
2090 name_len = strlen(hid->name);
2091 suffix_len = strlen(suffix);
2092 if ((name_len < suffix_len) ||
2093 strcmp(hid->name + name_len - suffix_len, suffix)) {
2094 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2095 hid->name, suffix);
2096 if (!hidinput->name)
2097 goto fail;
2098 }
2099 }
2100
2101 input_set_drvdata(input_dev, hid);
2102 input_dev->event = hidinput_input_event;
2103 input_dev->open = hidinput_open;
2104 input_dev->close = hidinput_close;
2105 input_dev->setkeycode = hidinput_setkeycode;
2106 input_dev->getkeycode = hidinput_getkeycode;
2107
2108 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2109 input_dev->phys = hid->phys;
2110 input_dev->uniq = hid->uniq;
2111 input_dev->id.bustype = hid->bus;
2112 input_dev->id.vendor = hid->vendor;
2113 input_dev->id.product = hid->product;
2114 input_dev->id.version = hid->version;
2115 input_dev->dev.parent = &hid->dev;
2116
2117 hidinput->input = input_dev;
2118 hidinput->application = application;
2119 list_add_tail(&hidinput->list, &hid->inputs);
2120
2121 INIT_LIST_HEAD(&hidinput->reports);
2122
2123 return hidinput;
2124
2125 fail:
2126 kfree(hidinput);
2127 input_free_device(input_dev);
2128 hid_err(hid, "Out of memory during hid input probe\n");
2129 return NULL;
2130 }
2131
hidinput_has_been_populated(struct hid_input * hidinput)2132 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2133 {
2134 int i;
2135 unsigned long r = 0;
2136
2137 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2138 r |= hidinput->input->evbit[i];
2139
2140 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2141 r |= hidinput->input->keybit[i];
2142
2143 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2144 r |= hidinput->input->relbit[i];
2145
2146 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2147 r |= hidinput->input->absbit[i];
2148
2149 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2150 r |= hidinput->input->mscbit[i];
2151
2152 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2153 r |= hidinput->input->ledbit[i];
2154
2155 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2156 r |= hidinput->input->sndbit[i];
2157
2158 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2159 r |= hidinput->input->ffbit[i];
2160
2161 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2162 r |= hidinput->input->swbit[i];
2163
2164 return !!r;
2165 }
2166
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)2167 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2168 struct hid_input *hidinput)
2169 {
2170 struct hid_report *report;
2171 int i, k;
2172
2173 list_del(&hidinput->list);
2174 input_free_device(hidinput->input);
2175 kfree(hidinput->name);
2176
2177 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2178 if (k == HID_OUTPUT_REPORT &&
2179 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2180 continue;
2181
2182 list_for_each_entry(report, &hid->report_enum[k].report_list,
2183 list) {
2184
2185 for (i = 0; i < report->maxfield; i++)
2186 if (report->field[i]->hidinput == hidinput)
2187 report->field[i]->hidinput = NULL;
2188 }
2189 }
2190
2191 kfree(hidinput);
2192 }
2193
hidinput_match(struct hid_report * report)2194 static struct hid_input *hidinput_match(struct hid_report *report)
2195 {
2196 struct hid_device *hid = report->device;
2197 struct hid_input *hidinput;
2198
2199 list_for_each_entry(hidinput, &hid->inputs, list) {
2200 if (hidinput->report &&
2201 hidinput->report->id == report->id)
2202 return hidinput;
2203 }
2204
2205 return NULL;
2206 }
2207
hidinput_match_application(struct hid_report * report)2208 static struct hid_input *hidinput_match_application(struct hid_report *report)
2209 {
2210 struct hid_device *hid = report->device;
2211 struct hid_input *hidinput;
2212
2213 list_for_each_entry(hidinput, &hid->inputs, list) {
2214 if (hidinput->application == report->application)
2215 return hidinput;
2216
2217 /*
2218 * Keep SystemControl and ConsumerControl applications together
2219 * with the main keyboard, if present.
2220 */
2221 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2222 report->application == HID_CP_CONSUMER_CONTROL) &&
2223 hidinput->application == HID_GD_KEYBOARD) {
2224 return hidinput;
2225 }
2226 }
2227
2228 return NULL;
2229 }
2230
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)2231 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2232 struct hid_report *report)
2233 {
2234 int i, j, k;
2235 int first_field_index = 0;
2236 int slot_collection_index = -1;
2237 int prev_collection_index = -1;
2238 unsigned int slot_idx = 0;
2239 struct hid_field *field;
2240
2241 /*
2242 * First tag all the fields that are part of a slot,
2243 * a slot needs to have one Contact ID in the collection
2244 */
2245 for (i = 0; i < report->maxfield; i++) {
2246 field = report->field[i];
2247
2248 /* ignore fields without usage */
2249 if (field->maxusage < 1)
2250 continue;
2251
2252 /*
2253 * janitoring when collection_index changes
2254 */
2255 if (prev_collection_index != field->usage->collection_index) {
2256 prev_collection_index = field->usage->collection_index;
2257 first_field_index = i;
2258 }
2259
2260 /*
2261 * if we already found a Contact ID in the collection,
2262 * tag and continue to the next.
2263 */
2264 if (slot_collection_index == field->usage->collection_index) {
2265 field->slot_idx = slot_idx;
2266 continue;
2267 }
2268
2269 /* check if the current field has Contact ID */
2270 for (j = 0; j < field->maxusage; j++) {
2271 if (field->usage[j].hid == HID_DG_CONTACTID) {
2272 slot_collection_index = field->usage->collection_index;
2273 slot_idx++;
2274
2275 /*
2276 * mark all previous fields and this one in the
2277 * current collection to be slotted.
2278 */
2279 for (k = first_field_index; k <= i; k++)
2280 report->field[k]->slot_idx = slot_idx;
2281 break;
2282 }
2283 }
2284 }
2285
2286 for (i = 0; i < report->maxfield; i++)
2287 for (j = 0; j < report->field[i]->maxusage; j++)
2288 hidinput_configure_usage(hidinput, report->field[i],
2289 report->field[i]->usage + j,
2290 j);
2291 }
2292
2293 /*
2294 * Register the input device; print a message.
2295 * Configure the input layer interface
2296 * Read all reports and initialize the absolute field values.
2297 */
2298
hidinput_connect(struct hid_device * hid,unsigned int force)2299 int hidinput_connect(struct hid_device *hid, unsigned int force)
2300 {
2301 struct hid_driver *drv = hid->driver;
2302 struct hid_report *report;
2303 struct hid_input *next, *hidinput = NULL;
2304 unsigned int application;
2305 int i, k;
2306
2307 INIT_LIST_HEAD(&hid->inputs);
2308 INIT_WORK(&hid->led_work, hidinput_led_worker);
2309
2310 hid->status &= ~HID_STAT_DUP_DETECTED;
2311
2312 if (!force) {
2313 for (i = 0; i < hid->maxcollection; i++) {
2314 struct hid_collection *col = &hid->collection[i];
2315 if (col->type == HID_COLLECTION_APPLICATION ||
2316 col->type == HID_COLLECTION_PHYSICAL)
2317 if (IS_INPUT_APPLICATION(col->usage))
2318 break;
2319 }
2320
2321 if (i == hid->maxcollection)
2322 return -1;
2323 }
2324
2325 report_features(hid);
2326
2327 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2328 if (k == HID_OUTPUT_REPORT &&
2329 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2330 continue;
2331
2332 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2333
2334 if (!report->maxfield)
2335 continue;
2336
2337 application = report->application;
2338
2339 /*
2340 * Find the previous hidinput report attached
2341 * to this report id.
2342 */
2343 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2344 hidinput = hidinput_match(report);
2345 else if (hid->maxapplication > 1 &&
2346 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2347 hidinput = hidinput_match_application(report);
2348
2349 if (!hidinput) {
2350 hidinput = hidinput_allocate(hid, application);
2351 if (!hidinput)
2352 goto out_unwind;
2353 }
2354
2355 hidinput_configure_usages(hidinput, report);
2356
2357 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2358 hidinput->report = report;
2359
2360 list_add_tail(&report->hidinput_list,
2361 &hidinput->reports);
2362 }
2363 }
2364
2365 hidinput_change_resolution_multipliers(hid);
2366
2367 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2368 if (drv->input_configured &&
2369 drv->input_configured(hid, hidinput))
2370 goto out_unwind;
2371
2372 if (!hidinput_has_been_populated(hidinput)) {
2373 /* no need to register an input device not populated */
2374 hidinput_cleanup_hidinput(hid, hidinput);
2375 continue;
2376 }
2377
2378 if (input_register_device(hidinput->input))
2379 goto out_unwind;
2380 hidinput->registered = true;
2381 }
2382
2383 if (list_empty(&hid->inputs)) {
2384 hid_dbg(hid, "No inputs registered, leaving\n");
2385 goto out_unwind;
2386 }
2387
2388 if (hid->status & HID_STAT_DUP_DETECTED)
2389 hid_dbg(hid,
2390 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2391
2392 return 0;
2393
2394 out_unwind:
2395 /* unwind the ones we already registered */
2396 hidinput_disconnect(hid);
2397
2398 return -1;
2399 }
2400 EXPORT_SYMBOL_GPL(hidinput_connect);
2401
hidinput_disconnect(struct hid_device * hid)2402 void hidinput_disconnect(struct hid_device *hid)
2403 {
2404 struct hid_input *hidinput, *next;
2405
2406 hidinput_cleanup_battery(hid);
2407
2408 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2409 list_del(&hidinput->list);
2410 if (hidinput->registered)
2411 input_unregister_device(hidinput->input);
2412 else
2413 input_free_device(hidinput->input);
2414 kfree(hidinput->name);
2415 kfree(hidinput);
2416 }
2417
2418 /* led_work is spawned by input_dev callbacks, but doesn't access the
2419 * parent input_dev at all. Once all input devices are removed, we
2420 * know that led_work will never get restarted, so we can cancel it
2421 * synchronously and are safe. */
2422 cancel_work_sync(&hid->led_work);
2423 }
2424 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2425
hidinput_reset_resume(struct hid_device * hid)2426 void hidinput_reset_resume(struct hid_device *hid)
2427 {
2428 /* renegotiate host-device shared state after reset */
2429 hidinput_change_resolution_multipliers(hid);
2430 }
2431 EXPORT_SYMBOL_GPL(hidinput_reset_resume);
2432
2433 #ifdef CONFIG_HID_KUNIT_TEST
2434 #include "hid-input-test.c"
2435 #endif
2436