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