Line data Source code
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 :
107 0 : static bool match_scancode(struct hid_usage *usage,
108 : unsigned int cur_idx, unsigned int scancode)
109 : {
110 0 : return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
111 : }
112 :
113 0 : 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 0 : return (usage->type == EV_KEY && usage->code == keycode);
120 : }
121 :
122 0 : static bool match_index(struct hid_usage *usage,
123 : unsigned int cur_idx, unsigned int idx)
124 : {
125 0 : 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 :
131 0 : 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 0 : unsigned int i, j, k, cur_idx = 0;
137 : struct hid_report *report;
138 : struct hid_usage *usage;
139 :
140 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
141 0 : list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
142 0 : for (i = 0; i < report->maxfield; i++) {
143 0 : for (j = 0; j < report->field[i]->maxusage; j++) {
144 0 : usage = report->field[i]->usage + j;
145 0 : if (usage->type == EV_KEY || usage->type == 0) {
146 0 : if (match(usage, cur_idx, value)) {
147 0 : if (usage_idx)
148 0 : *usage_idx = cur_idx;
149 : return usage;
150 : }
151 0 : cur_idx++;
152 : }
153 : }
154 : }
155 : }
156 : }
157 : return NULL;
158 : }
159 :
160 0 : 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 0 : if (ke->flags & INPUT_KEYMAP_BY_INDEX)
168 0 : usage = hidinput_find_key(hid, match_index, ke->index, index);
169 0 : else if (input_scancode_to_scalar(ke, &scancode) == 0)
170 0 : usage = hidinput_find_key(hid, match_scancode, scancode, index);
171 : else
172 : usage = NULL;
173 :
174 0 : return usage;
175 : }
176 :
177 0 : static int hidinput_getkeycode(struct input_dev *dev,
178 : struct input_keymap_entry *ke)
179 : {
180 0 : struct hid_device *hid = input_get_drvdata(dev);
181 : struct hid_usage *usage;
182 : unsigned int scancode, index;
183 :
184 0 : usage = hidinput_locate_usage(hid, ke, &index);
185 0 : if (usage) {
186 0 : ke->keycode = usage->type == EV_KEY ?
187 0 : usage->code : KEY_RESERVED;
188 0 : ke->index = index;
189 0 : scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
190 0 : ke->len = sizeof(scancode);
191 0 : memcpy(ke->scancode, &scancode, sizeof(scancode));
192 0 : return 0;
193 : }
194 :
195 : return -EINVAL;
196 : }
197 :
198 0 : static int hidinput_setkeycode(struct input_dev *dev,
199 : const struct input_keymap_entry *ke,
200 : unsigned int *old_keycode)
201 : {
202 0 : struct hid_device *hid = input_get_drvdata(dev);
203 : struct hid_usage *usage;
204 :
205 0 : usage = hidinput_locate_usage(hid, ke, NULL);
206 0 : if (usage) {
207 0 : *old_keycode = usage->type == EV_KEY ?
208 0 : usage->code : KEY_RESERVED;
209 0 : usage->type = EV_KEY;
210 0 : usage->code = ke->keycode;
211 :
212 0 : clear_bit(*old_keycode, dev->keybit);
213 0 : set_bit(usage->code, dev->keybit);
214 0 : 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 0 : if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
222 0 : set_bit(*old_keycode, dev->keybit);
223 :
224 : return 0;
225 : }
226 :
227 : return -EINVAL;
228 : }
229 :
230 :
231 : /**
232 : * hidinput_calc_abs_res - calculate an absolute axis resolution
233 : * @field: the HID report field to calculate resolution for
234 : * @code: axis code
235 : *
236 : * The formula is:
237 : * (logical_maximum - logical_minimum)
238 : * resolution = ----------------------------------------------------------
239 : * (physical_maximum - physical_minimum) * 10 ^ unit_exponent
240 : *
241 : * as seen in the HID specification v1.11 6.2.2.7 Global Items.
242 : *
243 : * Only exponent 1 length units are processed. Centimeters and inches are
244 : * converted to millimeters. Degrees are converted to radians.
245 : */
246 0 : __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
247 : {
248 0 : __s32 unit_exponent = field->unit_exponent;
249 0 : __s32 logical_extents = field->logical_maximum -
250 0 : field->logical_minimum;
251 0 : __s32 physical_extents = field->physical_maximum -
252 0 : field->physical_minimum;
253 : __s32 prev;
254 :
255 : /* Check if the extents are sane */
256 0 : 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 0 : if (field->unit == 0x11) { /* If centimeters */
274 : /* Convert to millimeters */
275 0 : unit_exponent += 1;
276 0 : } else if (field->unit == 0x13) { /* If inches */
277 : /* Convert to millimeters */
278 0 : prev = physical_extents;
279 0 : physical_extents *= 254;
280 0 : if (physical_extents < prev)
281 : return 0;
282 0 : 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 0 : if (field->unit == 0x14) { /* If degrees */
295 : /* Convert to radians */
296 0 : prev = logical_extents;
297 0 : logical_extents *= 573;
298 0 : if (logical_extents < prev)
299 : return 0;
300 0 : unit_exponent += 1;
301 0 : } else if (field->unit != 0x12) { /* If not radians */
302 : return 0;
303 : }
304 : break;
305 :
306 : default:
307 : return 0;
308 : }
309 :
310 : /* Apply negative unit exponent */
311 0 : for (; unit_exponent < 0; unit_exponent++) {
312 0 : prev = logical_extents;
313 0 : logical_extents *= 10;
314 0 : if (logical_extents < prev)
315 : return 0;
316 : }
317 : /* Apply positive unit exponent */
318 0 : for (; unit_exponent > 0; unit_exponent--) {
319 0 : prev = physical_extents;
320 0 : physical_extents *= 10;
321 0 : if (physical_extents < prev)
322 : return 0;
323 : }
324 :
325 : /* Calculate resolution */
326 0 : return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
327 : }
328 : EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
329 :
330 : #ifdef CONFIG_HID_BATTERY_STRENGTH
331 : static enum power_supply_property hidinput_battery_props[] = {
332 : POWER_SUPPLY_PROP_PRESENT,
333 : POWER_SUPPLY_PROP_ONLINE,
334 : POWER_SUPPLY_PROP_CAPACITY,
335 : POWER_SUPPLY_PROP_MODEL_NAME,
336 : POWER_SUPPLY_PROP_STATUS,
337 : POWER_SUPPLY_PROP_SCOPE,
338 : };
339 :
340 : #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
341 : #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
342 : #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
343 :
344 : static const struct hid_device_id hid_battery_quirks[] = {
345 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
346 : USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
347 : HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
348 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
349 : USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
350 : HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
351 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
352 : USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
353 : HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
354 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
355 : USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
356 : HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
357 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
358 : USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
359 : HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
360 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
361 : USB_DEVICE_ID_ELECOM_BM084),
362 : HID_BATTERY_QUIRK_IGNORE },
363 : { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
364 : USB_DEVICE_ID_SYMBOL_SCANNER_3),
365 : HID_BATTERY_QUIRK_IGNORE },
366 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
367 : USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
368 : HID_BATTERY_QUIRK_IGNORE },
369 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
370 : USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
371 : HID_BATTERY_QUIRK_IGNORE },
372 : { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
373 : HID_BATTERY_QUIRK_IGNORE },
374 : { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
375 : HID_BATTERY_QUIRK_IGNORE },
376 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
377 : HID_BATTERY_QUIRK_IGNORE },
378 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
379 : HID_BATTERY_QUIRK_IGNORE },
380 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
381 : HID_BATTERY_QUIRK_IGNORE },
382 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
383 : HID_BATTERY_QUIRK_IGNORE },
384 : {}
385 : };
386 :
387 : static unsigned find_battery_quirk(struct hid_device *hdev)
388 : {
389 : unsigned quirks = 0;
390 : const struct hid_device_id *match;
391 :
392 : match = hid_match_id(hdev, hid_battery_quirks);
393 : if (match != NULL)
394 : quirks = match->driver_data;
395 :
396 : return quirks;
397 : }
398 :
399 : static int hidinput_scale_battery_capacity(struct hid_device *dev,
400 : int value)
401 : {
402 : if (dev->battery_min < dev->battery_max &&
403 : value >= dev->battery_min && value <= dev->battery_max)
404 : value = ((value - dev->battery_min) * 100) /
405 : (dev->battery_max - dev->battery_min);
406 :
407 : return value;
408 : }
409 :
410 : static int hidinput_query_battery_capacity(struct hid_device *dev)
411 : {
412 : u8 *buf;
413 : int ret;
414 :
415 : buf = kmalloc(4, GFP_KERNEL);
416 : if (!buf)
417 : return -ENOMEM;
418 :
419 : ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
420 : dev->battery_report_type, HID_REQ_GET_REPORT);
421 : if (ret < 2) {
422 : kfree(buf);
423 : return -ENODATA;
424 : }
425 :
426 : ret = hidinput_scale_battery_capacity(dev, buf[1]);
427 : kfree(buf);
428 : return ret;
429 : }
430 :
431 : static int hidinput_get_battery_property(struct power_supply *psy,
432 : enum power_supply_property prop,
433 : union power_supply_propval *val)
434 : {
435 : struct hid_device *dev = power_supply_get_drvdata(psy);
436 : int value;
437 : int ret = 0;
438 :
439 : switch (prop) {
440 : case POWER_SUPPLY_PROP_PRESENT:
441 : case POWER_SUPPLY_PROP_ONLINE:
442 : val->intval = 1;
443 : break;
444 :
445 : case POWER_SUPPLY_PROP_CAPACITY:
446 : if (dev->battery_status != HID_BATTERY_REPORTED &&
447 : !dev->battery_avoid_query) {
448 : value = hidinput_query_battery_capacity(dev);
449 : if (value < 0)
450 : return value;
451 : } else {
452 : value = dev->battery_capacity;
453 : }
454 :
455 : val->intval = value;
456 : break;
457 :
458 : case POWER_SUPPLY_PROP_MODEL_NAME:
459 : val->strval = dev->name;
460 : break;
461 :
462 : case POWER_SUPPLY_PROP_STATUS:
463 : if (dev->battery_status != HID_BATTERY_REPORTED &&
464 : !dev->battery_avoid_query) {
465 : value = hidinput_query_battery_capacity(dev);
466 : if (value < 0)
467 : return value;
468 :
469 : dev->battery_capacity = value;
470 : dev->battery_status = HID_BATTERY_QUERIED;
471 : }
472 :
473 : if (dev->battery_status == HID_BATTERY_UNKNOWN)
474 : val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
475 : else
476 : val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
477 : break;
478 :
479 : case POWER_SUPPLY_PROP_SCOPE:
480 : val->intval = POWER_SUPPLY_SCOPE_DEVICE;
481 : break;
482 :
483 : default:
484 : ret = -EINVAL;
485 : break;
486 : }
487 :
488 : return ret;
489 : }
490 :
491 : static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
492 : struct hid_field *field, bool is_percentage)
493 : {
494 : struct power_supply_desc *psy_desc;
495 : struct power_supply_config psy_cfg = { .drv_data = dev, };
496 : unsigned quirks;
497 : s32 min, max;
498 : int error;
499 :
500 : if (dev->battery)
501 : return 0; /* already initialized? */
502 :
503 : quirks = find_battery_quirk(dev);
504 :
505 : hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
506 : dev->bus, dev->vendor, dev->product, dev->version, quirks);
507 :
508 : if (quirks & HID_BATTERY_QUIRK_IGNORE)
509 : return 0;
510 :
511 : psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
512 : if (!psy_desc)
513 : return -ENOMEM;
514 :
515 : psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
516 : strlen(dev->uniq) ?
517 : dev->uniq : dev_name(&dev->dev));
518 : if (!psy_desc->name) {
519 : error = -ENOMEM;
520 : goto err_free_mem;
521 : }
522 :
523 : psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
524 : psy_desc->properties = hidinput_battery_props;
525 : psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
526 : psy_desc->use_for_apm = 0;
527 : psy_desc->get_property = hidinput_get_battery_property;
528 :
529 : min = field->logical_minimum;
530 : max = field->logical_maximum;
531 :
532 : if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
533 : min = 0;
534 : max = 100;
535 : }
536 :
537 : if (quirks & HID_BATTERY_QUIRK_FEATURE)
538 : report_type = HID_FEATURE_REPORT;
539 :
540 : dev->battery_min = min;
541 : dev->battery_max = max;
542 : dev->battery_report_type = report_type;
543 : dev->battery_report_id = field->report->id;
544 :
545 : /*
546 : * Stylus is normally not connected to the device and thus we
547 : * can't query the device and get meaningful battery strength.
548 : * We have to wait for the device to report it on its own.
549 : */
550 : dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
551 : field->physical == HID_DG_STYLUS;
552 :
553 : dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
554 : if (IS_ERR(dev->battery)) {
555 : error = PTR_ERR(dev->battery);
556 : hid_warn(dev, "can't register power supply: %d\n", error);
557 : goto err_free_name;
558 : }
559 :
560 : power_supply_powers(dev->battery, &dev->dev);
561 : return 0;
562 :
563 : err_free_name:
564 : kfree(psy_desc->name);
565 : err_free_mem:
566 : kfree(psy_desc);
567 : dev->battery = NULL;
568 : return error;
569 : }
570 :
571 : static void hidinput_cleanup_battery(struct hid_device *dev)
572 : {
573 : const struct power_supply_desc *psy_desc;
574 :
575 : if (!dev->battery)
576 : return;
577 :
578 : psy_desc = dev->battery->desc;
579 : power_supply_unregister(dev->battery);
580 : kfree(psy_desc->name);
581 : kfree(psy_desc);
582 : dev->battery = NULL;
583 : }
584 :
585 : static void hidinput_update_battery(struct hid_device *dev, int value)
586 : {
587 : int capacity;
588 :
589 : if (!dev->battery)
590 : return;
591 :
592 : if (value == 0 || value < dev->battery_min || value > dev->battery_max)
593 : return;
594 :
595 : capacity = hidinput_scale_battery_capacity(dev, value);
596 :
597 : if (dev->battery_status != HID_BATTERY_REPORTED ||
598 : capacity != dev->battery_capacity ||
599 : ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
600 : dev->battery_capacity = capacity;
601 : dev->battery_status = HID_BATTERY_REPORTED;
602 : dev->battery_ratelimit_time =
603 : ktime_add_ms(ktime_get_coarse(), 30 * 1000);
604 : power_supply_changed(dev->battery);
605 : }
606 : }
607 : #else /* !CONFIG_HID_BATTERY_STRENGTH */
608 : static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
609 : struct hid_field *field, bool is_percentage)
610 : {
611 : return 0;
612 : }
613 :
614 : static void hidinput_cleanup_battery(struct hid_device *dev)
615 : {
616 : }
617 :
618 : static void hidinput_update_battery(struct hid_device *dev, int value)
619 : {
620 : }
621 : #endif /* CONFIG_HID_BATTERY_STRENGTH */
622 :
623 : static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
624 : unsigned int type, unsigned int usage)
625 : {
626 : struct hid_collection *collection;
627 :
628 0 : collection = &device->collection[field->usage->collection_index];
629 :
630 0 : return collection->type == type && collection->usage == usage;
631 : }
632 :
633 0 : static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
634 : struct hid_usage *usage, unsigned int usage_index)
635 : {
636 0 : struct input_dev *input = hidinput->input;
637 0 : struct hid_device *device = input_get_drvdata(input);
638 0 : const struct usage_priority *usage_priority = NULL;
639 0 : int max = 0, code;
640 0 : unsigned int i = 0;
641 0 : unsigned long *bit = NULL;
642 :
643 0 : field->hidinput = hidinput;
644 :
645 0 : if (field->flags & HID_MAIN_ITEM_CONSTANT)
646 : goto ignore;
647 :
648 : /* Ignore if report count is out of bounds. */
649 0 : if (field->report_count < 1)
650 : goto ignore;
651 :
652 : /* only LED usages are supported in output fields */
653 0 : if (field->report_type == HID_OUTPUT_REPORT &&
654 0 : (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
655 : goto ignore;
656 : }
657 :
658 : /* assign a priority based on the static list declared here */
659 0 : for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
660 0 : if (usage->hid == hidinput_usages_priorities[i].usage) {
661 0 : usage_priority = &hidinput_usages_priorities[i];
662 :
663 0 : field->usages_priorities[usage_index] =
664 0 : (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
665 0 : break;
666 : }
667 : }
668 :
669 : /*
670 : * For slotted devices, we need to also add the slot index
671 : * in the priority.
672 : */
673 0 : if (usage_priority && usage_priority->global)
674 0 : field->usages_priorities[usage_index] |=
675 0 : usage_priority->slot_overwrite;
676 : else
677 0 : field->usages_priorities[usage_index] |=
678 0 : (0xff - field->slot_idx) << 16;
679 :
680 0 : if (device->driver->input_mapping) {
681 0 : int ret = device->driver->input_mapping(device, hidinput, field,
682 : usage, &bit, &max);
683 0 : if (ret > 0)
684 : goto mapped;
685 0 : if (ret < 0)
686 : goto ignore;
687 : }
688 :
689 0 : switch (usage->hid & HID_USAGE_PAGE) {
690 : case HID_UP_UNDEFINED:
691 : goto ignore;
692 :
693 : case HID_UP_KEYBOARD:
694 0 : set_bit(EV_REP, input->evbit);
695 :
696 0 : if ((usage->hid & HID_USAGE) < 256) {
697 0 : if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
698 0 : map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
699 : } else
700 0 : map_key(KEY_UNKNOWN);
701 :
702 : break;
703 :
704 : case HID_UP_BUTTON:
705 0 : code = ((usage->hid - 1) & HID_USAGE);
706 :
707 0 : switch (field->application) {
708 : case HID_GD_MOUSE:
709 0 : case HID_GD_POINTER: code += BTN_MOUSE; break;
710 : case HID_GD_JOYSTICK:
711 0 : if (code <= 0xf)
712 0 : code += BTN_JOYSTICK;
713 : else
714 0 : code += BTN_TRIGGER_HAPPY - 0x10;
715 : break;
716 : case HID_GD_GAMEPAD:
717 0 : if (code <= 0xf)
718 0 : code += BTN_GAMEPAD;
719 : else
720 0 : code += BTN_TRIGGER_HAPPY - 0x10;
721 : break;
722 : case HID_CP_CONSUMER_CONTROL:
723 0 : if (hidinput_field_in_collection(device, field,
724 : HID_COLLECTION_NAMED_ARRAY,
725 : HID_CP_PROGRAMMABLEBUTTONS)) {
726 0 : if (code <= 0x1d)
727 0 : code += KEY_MACRO1;
728 : else
729 0 : code += BTN_TRIGGER_HAPPY - 0x1e;
730 : break;
731 : }
732 : fallthrough;
733 : default:
734 0 : switch (field->physical) {
735 : case HID_GD_MOUSE:
736 0 : case HID_GD_POINTER: code += BTN_MOUSE; break;
737 0 : case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
738 0 : case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
739 0 : default: code += BTN_MISC;
740 : }
741 : }
742 :
743 0 : map_key(code);
744 0 : break;
745 :
746 : case HID_UP_SIMULATION:
747 0 : switch (usage->hid & 0xffff) {
748 0 : case 0xba: map_abs(ABS_RUDDER); break;
749 0 : case 0xbb: map_abs(ABS_THROTTLE); break;
750 0 : case 0xc4: map_abs(ABS_GAS); break;
751 0 : case 0xc5: map_abs(ABS_BRAKE); break;
752 0 : case 0xc8: map_abs(ABS_WHEEL); break;
753 : default: goto ignore;
754 : }
755 : break;
756 :
757 : case HID_UP_GENDESK:
758 0 : if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
759 0 : switch (usage->hid & 0xf) {
760 0 : case 0x1: map_key_clear(KEY_POWER); break;
761 0 : case 0x2: map_key_clear(KEY_SLEEP); break;
762 0 : case 0x3: map_key_clear(KEY_WAKEUP); break;
763 0 : case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
764 0 : case 0x5: map_key_clear(KEY_MENU); break;
765 0 : case 0x6: map_key_clear(KEY_PROG1); break;
766 0 : case 0x7: map_key_clear(KEY_HELP); break;
767 0 : case 0x8: map_key_clear(KEY_EXIT); break;
768 0 : case 0x9: map_key_clear(KEY_SELECT); break;
769 0 : case 0xa: map_key_clear(KEY_RIGHT); break;
770 0 : case 0xb: map_key_clear(KEY_LEFT); break;
771 0 : case 0xc: map_key_clear(KEY_UP); break;
772 0 : case 0xd: map_key_clear(KEY_DOWN); break;
773 0 : case 0xe: map_key_clear(KEY_POWER2); break;
774 0 : case 0xf: map_key_clear(KEY_RESTART); break;
775 : default: goto unknown;
776 : }
777 : break;
778 : }
779 :
780 0 : if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
781 0 : switch (usage->hid & 0xf) {
782 0 : case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
783 : default: goto ignore;
784 : }
785 0 : break;
786 : }
787 :
788 : /*
789 : * Some lazy vendors declare 255 usages for System Control,
790 : * leading to the creation of ABS_X|Y axis and too many others.
791 : * It wouldn't be a problem if joydev doesn't consider the
792 : * device as a joystick then.
793 : */
794 0 : if (field->application == HID_GD_SYSTEM_CONTROL)
795 : goto ignore;
796 :
797 0 : if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
798 0 : switch (usage->hid) {
799 0 : case HID_GD_UP: usage->hat_dir = 1; break;
800 0 : case HID_GD_DOWN: usage->hat_dir = 5; break;
801 0 : case HID_GD_RIGHT: usage->hat_dir = 3; break;
802 0 : case HID_GD_LEFT: usage->hat_dir = 7; break;
803 : default: goto unknown;
804 : }
805 0 : if (field->dpad) {
806 0 : map_abs(field->dpad);
807 0 : goto ignore;
808 : }
809 0 : map_abs(ABS_HAT0X);
810 0 : break;
811 : }
812 :
813 0 : switch (usage->hid) {
814 : /* These usage IDs map directly to the usage codes. */
815 : case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
816 : case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
817 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE)
818 0 : map_rel(usage->hid & 0xf);
819 : else
820 0 : map_abs_clear(usage->hid & 0xf);
821 : break;
822 :
823 : case HID_GD_WHEEL:
824 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE) {
825 0 : set_bit(REL_WHEEL, input->relbit);
826 0 : map_rel(REL_WHEEL_HI_RES);
827 : } else {
828 0 : map_abs(usage->hid & 0xf);
829 : }
830 : break;
831 : case HID_GD_SLIDER: case HID_GD_DIAL:
832 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE)
833 0 : map_rel(usage->hid & 0xf);
834 : else
835 0 : map_abs(usage->hid & 0xf);
836 : break;
837 :
838 : case HID_GD_HATSWITCH:
839 0 : usage->hat_min = field->logical_minimum;
840 0 : usage->hat_max = field->logical_maximum;
841 0 : map_abs(ABS_HAT0X);
842 0 : break;
843 :
844 0 : case HID_GD_START: map_key_clear(BTN_START); break;
845 0 : case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
846 :
847 : case HID_GD_RFKILL_BTN:
848 : /* MS wireless radio ctl extension, also check CA */
849 0 : if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
850 0 : map_key_clear(KEY_RFKILL);
851 : /* We need to simulate the btn release */
852 0 : field->flags |= HID_MAIN_ITEM_RELATIVE;
853 0 : break;
854 : }
855 : goto unknown;
856 :
857 : default: goto unknown;
858 : }
859 :
860 : break;
861 :
862 : case HID_UP_LED:
863 0 : switch (usage->hid & 0xffff) { /* HID-Value: */
864 0 : case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
865 0 : case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
866 0 : case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
867 0 : case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
868 0 : case 0x05: map_led (LED_KANA); break; /* "Kana" */
869 0 : case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
870 0 : case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
871 0 : case 0x09: map_led (LED_MUTE); break; /* "Mute" */
872 0 : case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
873 0 : case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
874 0 : case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
875 :
876 : default: goto ignore;
877 : }
878 : break;
879 :
880 : case HID_UP_DIGITIZER:
881 0 : if ((field->application & 0xff) == 0x01) /* Digitizer */
882 0 : __set_bit(INPUT_PROP_POINTER, input->propbit);
883 0 : else if ((field->application & 0xff) == 0x02) /* Pen */
884 0 : __set_bit(INPUT_PROP_DIRECT, input->propbit);
885 :
886 0 : switch (usage->hid & 0xff) {
887 : case 0x00: /* Undefined */
888 : goto ignore;
889 :
890 : case 0x30: /* TipPressure */
891 0 : if (!test_bit(BTN_TOUCH, input->keybit)) {
892 0 : device->quirks |= HID_QUIRK_NOTOUCH;
893 0 : set_bit(EV_KEY, input->evbit);
894 0 : set_bit(BTN_TOUCH, input->keybit);
895 : }
896 0 : map_abs_clear(ABS_PRESSURE);
897 0 : break;
898 :
899 : case 0x32: /* InRange */
900 0 : switch (field->physical) {
901 : case HID_DG_PUCK:
902 0 : map_key(BTN_TOOL_MOUSE);
903 0 : break;
904 : case HID_DG_FINGER:
905 0 : map_key(BTN_TOOL_FINGER);
906 0 : break;
907 : default:
908 : /*
909 : * If the physical is not given,
910 : * rely on the application.
911 : */
912 0 : if (!field->physical) {
913 0 : switch (field->application) {
914 : case HID_DG_TOUCHSCREEN:
915 : case HID_DG_TOUCHPAD:
916 0 : map_key_clear(BTN_TOOL_FINGER);
917 0 : break;
918 : default:
919 0 : map_key_clear(BTN_TOOL_PEN);
920 : }
921 : } else {
922 0 : map_key(BTN_TOOL_PEN);
923 : }
924 : break;
925 : }
926 : break;
927 :
928 : case 0x3b: /* Battery Strength */
929 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
930 0 : usage->type = EV_PWR;
931 0 : return;
932 :
933 : case 0x3c: /* Invert */
934 0 : map_key_clear(BTN_TOOL_RUBBER);
935 0 : break;
936 :
937 : case 0x3d: /* X Tilt */
938 0 : map_abs_clear(ABS_TILT_X);
939 0 : break;
940 :
941 : case 0x3e: /* Y Tilt */
942 0 : map_abs_clear(ABS_TILT_Y);
943 0 : break;
944 :
945 : case 0x33: /* Touch */
946 : case 0x42: /* TipSwitch */
947 : case 0x43: /* TipSwitch2 */
948 0 : device->quirks &= ~HID_QUIRK_NOTOUCH;
949 0 : map_key_clear(BTN_TOUCH);
950 0 : break;
951 :
952 : case 0x44: /* BarrelSwitch */
953 0 : map_key_clear(BTN_STYLUS);
954 0 : break;
955 :
956 : case 0x45: /* ERASER */
957 : /*
958 : * This event is reported when eraser tip touches the surface.
959 : * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
960 : * tool gets in proximity.
961 : */
962 0 : map_key_clear(BTN_TOUCH);
963 0 : break;
964 :
965 : case 0x46: /* TabletPick */
966 : case 0x5a: /* SecondaryBarrelSwitch */
967 0 : map_key_clear(BTN_STYLUS2);
968 0 : break;
969 :
970 : case 0x5b: /* TransducerSerialNumber */
971 : case 0x6e: /* TransducerSerialNumber2 */
972 0 : map_msc(MSC_SERIAL);
973 0 : break;
974 :
975 : default: goto unknown;
976 : }
977 : break;
978 :
979 : case HID_UP_TELEPHONY:
980 0 : switch (usage->hid & HID_USAGE) {
981 0 : case 0x2f: map_key_clear(KEY_MICMUTE); break;
982 0 : case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
983 0 : case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
984 0 : case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
985 0 : case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
986 0 : case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
987 0 : case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
988 0 : case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
989 0 : case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
990 0 : case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
991 0 : case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
992 0 : case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
993 0 : case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
994 0 : case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
995 0 : case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
996 0 : case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
997 0 : case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
998 : default: goto ignore;
999 : }
1000 : break;
1001 :
1002 : case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1003 0 : switch (usage->hid & HID_USAGE) {
1004 : case 0x000: goto ignore;
1005 0 : case 0x030: map_key_clear(KEY_POWER); break;
1006 0 : case 0x031: map_key_clear(KEY_RESTART); break;
1007 0 : case 0x032: map_key_clear(KEY_SLEEP); break;
1008 0 : case 0x034: map_key_clear(KEY_SLEEP); break;
1009 0 : case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1010 0 : case 0x036: map_key_clear(BTN_MISC); break;
1011 :
1012 0 : case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1013 0 : case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1014 0 : case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1015 0 : case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1016 0 : case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1017 0 : case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1018 0 : case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1019 0 : case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1020 0 : case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1021 :
1022 0 : case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1023 0 : case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1024 0 : case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1025 0 : case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1026 0 : case 0x069: map_key_clear(KEY_RED); break;
1027 0 : case 0x06a: map_key_clear(KEY_GREEN); break;
1028 0 : case 0x06b: map_key_clear(KEY_BLUE); break;
1029 0 : case 0x06c: map_key_clear(KEY_YELLOW); break;
1030 0 : case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1031 :
1032 0 : case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1033 0 : case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1034 0 : case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1035 0 : case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1036 0 : case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1037 0 : case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1038 :
1039 0 : case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1040 0 : case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1041 0 : case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1042 :
1043 0 : case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1044 0 : case 0x083: map_key_clear(KEY_LAST); break;
1045 0 : case 0x084: map_key_clear(KEY_ENTER); break;
1046 0 : case 0x088: map_key_clear(KEY_PC); break;
1047 0 : case 0x089: map_key_clear(KEY_TV); break;
1048 0 : case 0x08a: map_key_clear(KEY_WWW); break;
1049 0 : case 0x08b: map_key_clear(KEY_DVD); break;
1050 0 : case 0x08c: map_key_clear(KEY_PHONE); break;
1051 0 : case 0x08d: map_key_clear(KEY_PROGRAM); break;
1052 0 : case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1053 0 : case 0x08f: map_key_clear(KEY_GAMES); break;
1054 0 : case 0x090: map_key_clear(KEY_MEMO); break;
1055 0 : case 0x091: map_key_clear(KEY_CD); break;
1056 0 : case 0x092: map_key_clear(KEY_VCR); break;
1057 0 : case 0x093: map_key_clear(KEY_TUNER); break;
1058 0 : case 0x094: map_key_clear(KEY_EXIT); break;
1059 0 : case 0x095: map_key_clear(KEY_HELP); break;
1060 0 : case 0x096: map_key_clear(KEY_TAPE); break;
1061 0 : case 0x097: map_key_clear(KEY_TV2); break;
1062 0 : case 0x098: map_key_clear(KEY_SAT); break;
1063 0 : case 0x09a: map_key_clear(KEY_PVR); break;
1064 :
1065 0 : case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1066 0 : case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1067 0 : case 0x0a0: map_key_clear(KEY_VCR2); break;
1068 :
1069 0 : case 0x0b0: map_key_clear(KEY_PLAY); break;
1070 0 : case 0x0b1: map_key_clear(KEY_PAUSE); break;
1071 0 : case 0x0b2: map_key_clear(KEY_RECORD); break;
1072 0 : case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1073 0 : case 0x0b4: map_key_clear(KEY_REWIND); break;
1074 0 : case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1075 0 : case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1076 0 : case 0x0b7: map_key_clear(KEY_STOPCD); break;
1077 0 : case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1078 0 : case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1079 0 : case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1080 0 : case 0x0bf: map_key_clear(KEY_SLOW); break;
1081 :
1082 0 : case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1083 0 : case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1084 :
1085 0 : case 0x0d8: map_key_clear(KEY_DICTATE); break;
1086 0 : case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1087 :
1088 0 : case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1089 0 : case 0x0e2: map_key_clear(KEY_MUTE); break;
1090 0 : case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1091 0 : case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1092 0 : case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1093 0 : case 0x0f5: map_key_clear(KEY_SLOW); break;
1094 :
1095 0 : case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1096 0 : case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1097 0 : case 0x183: map_key_clear(KEY_CONFIG); break;
1098 0 : case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1099 0 : case 0x185: map_key_clear(KEY_EDITOR); break;
1100 0 : case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1101 0 : case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1102 0 : case 0x188: map_key_clear(KEY_PRESENTATION); break;
1103 0 : case 0x189: map_key_clear(KEY_DATABASE); break;
1104 0 : case 0x18a: map_key_clear(KEY_MAIL); break;
1105 0 : case 0x18b: map_key_clear(KEY_NEWS); break;
1106 0 : case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1107 0 : case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1108 0 : case 0x18e: map_key_clear(KEY_CALENDAR); break;
1109 0 : case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1110 0 : case 0x190: map_key_clear(KEY_JOURNAL); break;
1111 0 : case 0x191: map_key_clear(KEY_FINANCE); break;
1112 0 : case 0x192: map_key_clear(KEY_CALC); break;
1113 0 : case 0x193: map_key_clear(KEY_PLAYER); break;
1114 0 : case 0x194: map_key_clear(KEY_FILE); break;
1115 0 : case 0x196: map_key_clear(KEY_WWW); break;
1116 0 : case 0x199: map_key_clear(KEY_CHAT); break;
1117 0 : case 0x19c: map_key_clear(KEY_LOGOFF); break;
1118 0 : case 0x19e: map_key_clear(KEY_COFFEE); break;
1119 0 : case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1120 0 : case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1121 0 : case 0x1a3: map_key_clear(KEY_NEXT); break;
1122 0 : case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1123 0 : case 0x1a6: map_key_clear(KEY_HELP); break;
1124 0 : case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1125 0 : case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1126 0 : case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1127 0 : case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1128 0 : case 0x1b4: map_key_clear(KEY_FILE); break;
1129 0 : case 0x1b6: map_key_clear(KEY_IMAGES); break;
1130 0 : case 0x1b7: map_key_clear(KEY_AUDIO); break;
1131 0 : case 0x1b8: map_key_clear(KEY_VIDEO); break;
1132 0 : case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1133 0 : case 0x1bd: map_key_clear(KEY_INFO); break;
1134 0 : case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1135 0 : case 0x201: map_key_clear(KEY_NEW); break;
1136 0 : case 0x202: map_key_clear(KEY_OPEN); break;
1137 0 : case 0x203: map_key_clear(KEY_CLOSE); break;
1138 0 : case 0x204: map_key_clear(KEY_EXIT); break;
1139 0 : case 0x207: map_key_clear(KEY_SAVE); break;
1140 0 : case 0x208: map_key_clear(KEY_PRINT); break;
1141 0 : case 0x209: map_key_clear(KEY_PROPS); break;
1142 0 : case 0x21a: map_key_clear(KEY_UNDO); break;
1143 0 : case 0x21b: map_key_clear(KEY_COPY); break;
1144 0 : case 0x21c: map_key_clear(KEY_CUT); break;
1145 0 : case 0x21d: map_key_clear(KEY_PASTE); break;
1146 0 : case 0x21f: map_key_clear(KEY_FIND); break;
1147 0 : case 0x221: map_key_clear(KEY_SEARCH); break;
1148 0 : case 0x222: map_key_clear(KEY_GOTO); break;
1149 0 : case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1150 0 : case 0x224: map_key_clear(KEY_BACK); break;
1151 0 : case 0x225: map_key_clear(KEY_FORWARD); break;
1152 0 : case 0x226: map_key_clear(KEY_STOP); break;
1153 0 : case 0x227: map_key_clear(KEY_REFRESH); break;
1154 0 : case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1155 0 : case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1156 0 : case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1157 0 : case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1158 0 : case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1159 0 : case 0x233: map_key_clear(KEY_SCROLLUP); break;
1160 0 : case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1161 : case 0x238: /* AC Pan */
1162 0 : set_bit(REL_HWHEEL, input->relbit);
1163 0 : map_rel(REL_HWHEEL_HI_RES);
1164 0 : break;
1165 0 : case 0x23d: map_key_clear(KEY_EDIT); break;
1166 0 : case 0x25f: map_key_clear(KEY_CANCEL); break;
1167 0 : case 0x269: map_key_clear(KEY_INSERT); break;
1168 0 : case 0x26a: map_key_clear(KEY_DELETE); break;
1169 0 : case 0x279: map_key_clear(KEY_REDO); break;
1170 :
1171 0 : case 0x289: map_key_clear(KEY_REPLY); break;
1172 0 : case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1173 0 : case 0x28c: map_key_clear(KEY_SEND); break;
1174 :
1175 0 : case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1176 :
1177 0 : case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1178 :
1179 0 : case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1180 0 : case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1181 0 : case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1182 0 : case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1183 0 : case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1184 0 : case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1185 :
1186 0 : case 0x29f: map_key_clear(KEY_SCALE); break;
1187 :
1188 0 : default: map_key_clear(KEY_UNKNOWN);
1189 : }
1190 : break;
1191 :
1192 : case HID_UP_GENDEVCTRLS:
1193 0 : switch (usage->hid) {
1194 : case HID_DC_BATTERYSTRENGTH:
1195 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1196 0 : usage->type = EV_PWR;
1197 0 : return;
1198 : }
1199 : goto unknown;
1200 :
1201 : case HID_UP_BATTERY:
1202 0 : switch (usage->hid) {
1203 : case HID_BAT_ABSOLUTESTATEOFCHARGE:
1204 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1205 0 : usage->type = EV_PWR;
1206 0 : return;
1207 : }
1208 : goto unknown;
1209 :
1210 : case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1211 0 : set_bit(EV_REP, input->evbit);
1212 0 : switch (usage->hid & HID_USAGE) {
1213 0 : case 0x021: map_key_clear(KEY_PRINT); break;
1214 0 : case 0x070: map_key_clear(KEY_HP); break;
1215 0 : case 0x071: map_key_clear(KEY_CAMERA); break;
1216 0 : case 0x072: map_key_clear(KEY_SOUND); break;
1217 0 : case 0x073: map_key_clear(KEY_QUESTION); break;
1218 0 : case 0x080: map_key_clear(KEY_EMAIL); break;
1219 0 : case 0x081: map_key_clear(KEY_CHAT); break;
1220 0 : case 0x082: map_key_clear(KEY_SEARCH); break;
1221 0 : case 0x083: map_key_clear(KEY_CONNECT); break;
1222 0 : case 0x084: map_key_clear(KEY_FINANCE); break;
1223 0 : case 0x085: map_key_clear(KEY_SPORT); break;
1224 0 : case 0x086: map_key_clear(KEY_SHOP); break;
1225 : default: goto ignore;
1226 : }
1227 : break;
1228 :
1229 : case HID_UP_HPVENDOR2:
1230 0 : set_bit(EV_REP, input->evbit);
1231 0 : switch (usage->hid & HID_USAGE) {
1232 0 : case 0x001: map_key_clear(KEY_MICMUTE); break;
1233 0 : case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1234 0 : case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1235 : default: goto ignore;
1236 : }
1237 : break;
1238 :
1239 : case HID_UP_MSVENDOR:
1240 : goto ignore;
1241 :
1242 : case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1243 0 : set_bit(EV_REP, input->evbit);
1244 : goto ignore;
1245 :
1246 : case HID_UP_LOGIVENDOR:
1247 : /* intentional fallback */
1248 : case HID_UP_LOGIVENDOR2:
1249 : /* intentional fallback */
1250 : case HID_UP_LOGIVENDOR3:
1251 : goto ignore;
1252 :
1253 : case HID_UP_PID:
1254 0 : switch (usage->hid & HID_USAGE) {
1255 0 : case 0xa4: map_key_clear(BTN_DEAD); break;
1256 : default: goto ignore;
1257 : }
1258 0 : break;
1259 :
1260 : default:
1261 : unknown:
1262 0 : if (field->report_size == 1) {
1263 0 : if (field->report->type == HID_OUTPUT_REPORT) {
1264 0 : map_led(LED_MISC);
1265 0 : break;
1266 : }
1267 0 : map_key(BTN_MISC);
1268 0 : break;
1269 : }
1270 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1271 0 : map_rel(REL_MISC);
1272 0 : break;
1273 : }
1274 0 : map_abs(ABS_MISC);
1275 0 : break;
1276 : }
1277 :
1278 : mapped:
1279 : /* Mapping failed, bail out */
1280 0 : if (!bit)
1281 : return;
1282 :
1283 0 : if (device->driver->input_mapped &&
1284 0 : device->driver->input_mapped(device, hidinput, field, usage,
1285 : &bit, &max) < 0) {
1286 : /*
1287 : * The driver indicated that no further generic handling
1288 : * of the usage is desired.
1289 : */
1290 : return;
1291 : }
1292 :
1293 0 : set_bit(usage->type, input->evbit);
1294 :
1295 : /*
1296 : * This part is *really* controversial:
1297 : * - HID aims at being generic so we should do our best to export
1298 : * all incoming events
1299 : * - HID describes what events are, so there is no reason for ABS_X
1300 : * to be mapped to ABS_Y
1301 : * - HID is using *_MISC+N as a default value, but nothing prevents
1302 : * *_MISC+N to overwrite a legitimate even, which confuses userspace
1303 : * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1304 : * processing)
1305 : *
1306 : * If devices still want to use this (at their own risk), they will
1307 : * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1308 : * the default should be a reliable mapping.
1309 : */
1310 0 : while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1311 0 : if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1312 0 : usage->code = find_next_zero_bit(bit,
1313 0 : max + 1,
1314 0 : usage->code);
1315 : } else {
1316 0 : device->status |= HID_STAT_DUP_DETECTED;
1317 0 : goto ignore;
1318 : }
1319 : }
1320 :
1321 0 : if (usage->code > max)
1322 : goto ignore;
1323 :
1324 0 : if (usage->type == EV_ABS) {
1325 :
1326 0 : int a = field->logical_minimum;
1327 0 : int b = field->logical_maximum;
1328 :
1329 0 : if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1330 0 : a = field->logical_minimum = 0;
1331 0 : b = field->logical_maximum = 255;
1332 : }
1333 :
1334 0 : if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1335 0 : input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1336 0 : else input_set_abs_params(input, usage->code, a, b, 0, 0);
1337 :
1338 0 : input_abs_set_res(input, usage->code,
1339 0 : hidinput_calc_abs_res(field, usage->code));
1340 :
1341 : /* use a larger default input buffer for MT devices */
1342 0 : if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1343 0 : input_set_events_per_packet(input, 60);
1344 : }
1345 :
1346 0 : if (usage->type == EV_ABS &&
1347 0 : (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1348 : int i;
1349 0 : for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1350 0 : input_set_abs_params(input, i, -1, 1, 0, 0);
1351 0 : set_bit(i, input->absbit);
1352 : }
1353 0 : if (usage->hat_dir && !field->dpad)
1354 0 : field->dpad = usage->code;
1355 : }
1356 :
1357 : /* for those devices which produce Consumer volume usage as relative,
1358 : * we emulate pressing volumeup/volumedown appropriate number of times
1359 : * in hidinput_hid_event()
1360 : */
1361 0 : if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1362 0 : (usage->code == ABS_VOLUME)) {
1363 0 : set_bit(KEY_VOLUMEUP, input->keybit);
1364 0 : set_bit(KEY_VOLUMEDOWN, input->keybit);
1365 : }
1366 :
1367 0 : if (usage->type == EV_KEY) {
1368 0 : set_bit(EV_MSC, input->evbit);
1369 0 : set_bit(MSC_SCAN, input->mscbit);
1370 : }
1371 :
1372 : return;
1373 :
1374 : ignore:
1375 0 : usage->type = 0;
1376 0 : usage->code = 0;
1377 : }
1378 :
1379 0 : static void hidinput_handle_scroll(struct hid_usage *usage,
1380 : struct input_dev *input,
1381 : __s32 value)
1382 : {
1383 : int code;
1384 : int hi_res, lo_res;
1385 :
1386 0 : if (value == 0)
1387 : return;
1388 :
1389 0 : if (usage->code == REL_WHEEL_HI_RES)
1390 : code = REL_WHEEL;
1391 : else
1392 0 : code = REL_HWHEEL;
1393 :
1394 : /*
1395 : * Windows reports one wheel click as value 120. Where a high-res
1396 : * scroll wheel is present, a fraction of 120 is reported instead.
1397 : * Our REL_WHEEL_HI_RES axis does the same because all HW must
1398 : * adhere to the 120 expectation.
1399 : */
1400 0 : hi_res = value * 120/usage->resolution_multiplier;
1401 :
1402 0 : usage->wheel_accumulated += hi_res;
1403 0 : lo_res = usage->wheel_accumulated/120;
1404 0 : if (lo_res)
1405 0 : usage->wheel_accumulated -= lo_res * 120;
1406 :
1407 0 : input_event(input, EV_REL, code, lo_res);
1408 0 : input_event(input, EV_REL, usage->code, hi_res);
1409 : }
1410 :
1411 0 : static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1412 : unsigned int tool)
1413 : {
1414 : /* if the given tool is not currently reported, ignore */
1415 0 : if (!test_bit(tool, input->key))
1416 : return;
1417 :
1418 : /*
1419 : * if the given tool was previously set, release it,
1420 : * release any TOUCH and send an EV_SYN
1421 : */
1422 0 : input_event(input, EV_KEY, BTN_TOUCH, 0);
1423 0 : input_event(input, EV_KEY, tool, 0);
1424 0 : input_event(input, EV_SYN, SYN_REPORT, 0);
1425 :
1426 0 : report->tool = 0;
1427 : }
1428 :
1429 0 : static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1430 : unsigned int new_tool)
1431 : {
1432 0 : if (report->tool != new_tool)
1433 0 : hid_report_release_tool(report, input, report->tool);
1434 :
1435 0 : input_event(input, EV_KEY, new_tool, 1);
1436 0 : report->tool = new_tool;
1437 0 : }
1438 :
1439 0 : void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1440 : {
1441 : struct input_dev *input;
1442 0 : struct hid_report *report = field->report;
1443 0 : unsigned *quirks = &hid->quirks;
1444 :
1445 0 : if (!usage->type)
1446 : return;
1447 :
1448 0 : if (usage->type == EV_PWR) {
1449 : hidinput_update_battery(hid, value);
1450 : return;
1451 : }
1452 :
1453 0 : if (!field->hidinput)
1454 : return;
1455 :
1456 0 : input = field->hidinput->input;
1457 :
1458 0 : if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1459 0 : int hat_dir = usage->hat_dir;
1460 0 : if (!hat_dir)
1461 0 : hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1462 0 : if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1463 0 : input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1464 0 : input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1465 0 : return;
1466 : }
1467 :
1468 : /*
1469 : * Ignore out-of-range values as per HID specification,
1470 : * section 5.10 and 6.2.25, when NULL state bit is present.
1471 : * When it's not, clamp the value to match Microsoft's input
1472 : * driver as mentioned in "Required HID usages for digitizers":
1473 : * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1474 : *
1475 : * The logical_minimum < logical_maximum check is done so that we
1476 : * don't unintentionally discard values sent by devices which
1477 : * don't specify logical min and max.
1478 : */
1479 0 : if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1480 0 : field->logical_minimum < field->logical_maximum) {
1481 0 : if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1482 0 : (value < field->logical_minimum ||
1483 : value > field->logical_maximum)) {
1484 0 : dbg_hid("Ignoring out-of-range value %x\n", value);
1485 : return;
1486 : }
1487 0 : value = clamp(value,
1488 : field->logical_minimum,
1489 : field->logical_maximum);
1490 : }
1491 :
1492 0 : switch (usage->hid) {
1493 : case HID_DG_ERASER:
1494 0 : report->tool_active |= !!value;
1495 :
1496 : /*
1497 : * if eraser is set, we must enforce BTN_TOOL_RUBBER
1498 : * to accommodate for devices not following the spec.
1499 : */
1500 0 : if (value)
1501 0 : hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1502 0 : else if (report->tool != BTN_TOOL_RUBBER)
1503 : /* value is off, tool is not rubber, ignore */
1504 : return;
1505 :
1506 : /* let hid-input set BTN_TOUCH */
1507 : break;
1508 :
1509 : case HID_DG_INVERT:
1510 0 : report->tool_active |= !!value;
1511 :
1512 : /*
1513 : * If invert is set, we store BTN_TOOL_RUBBER.
1514 : */
1515 0 : if (value)
1516 0 : hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1517 0 : else if (!report->tool_active)
1518 : /* tool_active not set means Invert and Eraser are not set */
1519 0 : hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1520 :
1521 : /* no further processing */
1522 : return;
1523 :
1524 : case HID_DG_INRANGE:
1525 0 : report->tool_active |= !!value;
1526 :
1527 0 : if (report->tool_active) {
1528 : /*
1529 : * if tool is not set but is marked as active,
1530 : * assume ours
1531 : */
1532 0 : if (!report->tool)
1533 0 : hid_report_set_tool(report, input, usage->code);
1534 : } else {
1535 0 : hid_report_release_tool(report, input, usage->code);
1536 : }
1537 :
1538 : /* reset tool_active for the next event */
1539 0 : report->tool_active = false;
1540 :
1541 : /* no further processing */
1542 0 : return;
1543 :
1544 : case HID_DG_TIPSWITCH:
1545 0 : report->tool_active |= !!value;
1546 :
1547 : /* if tool is set to RUBBER we should ignore the current value */
1548 0 : if (report->tool == BTN_TOOL_RUBBER)
1549 : return;
1550 :
1551 : break;
1552 :
1553 : case HID_DG_TIPPRESSURE:
1554 0 : if (*quirks & HID_QUIRK_NOTOUCH) {
1555 0 : int a = field->logical_minimum;
1556 0 : int b = field->logical_maximum;
1557 :
1558 0 : if (value > a + ((b - a) >> 3)) {
1559 0 : input_event(input, EV_KEY, BTN_TOUCH, 1);
1560 0 : report->tool_active = true;
1561 : }
1562 : }
1563 : break;
1564 :
1565 : case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1566 0 : dbg_hid("Maximum Effects - %d\n",value);
1567 : return;
1568 :
1569 : case HID_UP_PID | 0x7fUL:
1570 0 : dbg_hid("PID Pool Report\n");
1571 : return;
1572 : }
1573 :
1574 0 : switch (usage->type) {
1575 : case EV_KEY:
1576 0 : if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1577 : return;
1578 : break;
1579 :
1580 : case EV_REL:
1581 0 : if (usage->code == REL_WHEEL_HI_RES ||
1582 : usage->code == REL_HWHEEL_HI_RES) {
1583 0 : hidinput_handle_scroll(usage, input, value);
1584 0 : return;
1585 : }
1586 : break;
1587 :
1588 : case EV_ABS:
1589 0 : if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1590 0 : usage->code == ABS_VOLUME) {
1591 0 : int count = abs(value);
1592 0 : int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1593 : int i;
1594 :
1595 0 : for (i = 0; i < count; i++) {
1596 0 : input_event(input, EV_KEY, direction, 1);
1597 0 : input_sync(input);
1598 0 : input_event(input, EV_KEY, direction, 0);
1599 0 : input_sync(input);
1600 : }
1601 : return;
1602 :
1603 0 : } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1604 0 : ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1605 0 : value = field->logical_maximum - value;
1606 : break;
1607 : }
1608 :
1609 : /*
1610 : * Ignore reports for absolute data if the data didn't change. This is
1611 : * not only an optimization but also fixes 'dead' key reports. Some
1612 : * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1613 : * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1614 : * can only have one of them physically available. The 'dead' keys
1615 : * report constant 0. As all map to the same keycode, they'd confuse
1616 : * the input layer. If we filter the 'dead' keys on the HID level, we
1617 : * skip the keycode translation and only forward real events.
1618 : */
1619 0 : if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1620 0 : HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1621 0 : (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1622 0 : usage->usage_index < field->maxusage &&
1623 0 : value == field->value[usage->usage_index])
1624 : return;
1625 :
1626 : /* report the usage code as scancode if the key status has changed */
1627 0 : if (usage->type == EV_KEY &&
1628 0 : (!test_bit(usage->code, input->key)) == value)
1629 0 : input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1630 :
1631 0 : input_event(input, usage->type, usage->code, value);
1632 :
1633 0 : if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1634 0 : usage->type == EV_KEY && value) {
1635 0 : input_sync(input);
1636 0 : input_event(input, usage->type, usage->code, 0);
1637 : }
1638 : }
1639 :
1640 0 : void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1641 : {
1642 : struct hid_input *hidinput;
1643 :
1644 0 : if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1645 : return;
1646 :
1647 0 : list_for_each_entry(hidinput, &hid->inputs, list)
1648 0 : input_sync(hidinput->input);
1649 : }
1650 : EXPORT_SYMBOL_GPL(hidinput_report_event);
1651 :
1652 0 : static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1653 : unsigned int code, struct hid_field **field)
1654 : {
1655 : struct hid_report *report;
1656 : int i, j;
1657 :
1658 0 : list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1659 0 : for (i = 0; i < report->maxfield; i++) {
1660 0 : *field = report->field[i];
1661 0 : for (j = 0; j < (*field)->maxusage; j++)
1662 0 : if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1663 : return j;
1664 : }
1665 : }
1666 : return -1;
1667 : }
1668 :
1669 0 : struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1670 : {
1671 : struct hid_report *report;
1672 : struct hid_field *field;
1673 : int i, j;
1674 :
1675 0 : list_for_each_entry(report,
1676 : &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1677 : list) {
1678 0 : for (i = 0; i < report->maxfield; i++) {
1679 0 : field = report->field[i];
1680 0 : for (j = 0; j < field->maxusage; j++)
1681 0 : if (field->usage[j].type == EV_LED)
1682 : return field;
1683 : }
1684 : }
1685 : return NULL;
1686 : }
1687 : EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1688 :
1689 0 : unsigned int hidinput_count_leds(struct hid_device *hid)
1690 : {
1691 : struct hid_report *report;
1692 : struct hid_field *field;
1693 : int i, j;
1694 0 : unsigned int count = 0;
1695 :
1696 0 : list_for_each_entry(report,
1697 : &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1698 : list) {
1699 0 : for (i = 0; i < report->maxfield; i++) {
1700 0 : field = report->field[i];
1701 0 : for (j = 0; j < field->maxusage; j++)
1702 0 : if (field->usage[j].type == EV_LED &&
1703 0 : field->value[j])
1704 0 : count += 1;
1705 : }
1706 : }
1707 0 : return count;
1708 : }
1709 : EXPORT_SYMBOL_GPL(hidinput_count_leds);
1710 :
1711 0 : static void hidinput_led_worker(struct work_struct *work)
1712 : {
1713 0 : struct hid_device *hid = container_of(work, struct hid_device,
1714 : led_work);
1715 : struct hid_field *field;
1716 : struct hid_report *report;
1717 : int ret;
1718 : u32 len;
1719 : __u8 *buf;
1720 :
1721 0 : field = hidinput_get_led_field(hid);
1722 0 : if (!field)
1723 : return;
1724 :
1725 : /*
1726 : * field->report is accessed unlocked regarding HID core. So there might
1727 : * be another incoming SET-LED request from user-space, which changes
1728 : * the LED state while we assemble our outgoing buffer. However, this
1729 : * doesn't matter as hid_output_report() correctly converts it into a
1730 : * boolean value no matter what information is currently set on the LED
1731 : * field (even garbage). So the remote device will always get a valid
1732 : * request.
1733 : * And in case we send a wrong value, a next led worker is spawned
1734 : * for every SET-LED request so the following worker will send the
1735 : * correct value, guaranteed!
1736 : */
1737 :
1738 0 : report = field->report;
1739 :
1740 : /* use custom SET_REPORT request if possible (asynchronous) */
1741 0 : if (hid->ll_driver->request)
1742 0 : return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1743 :
1744 : /* fall back to generic raw-output-report */
1745 0 : len = hid_report_len(report);
1746 0 : buf = hid_alloc_report_buf(report, GFP_KERNEL);
1747 0 : if (!buf)
1748 : return;
1749 :
1750 0 : hid_output_report(report, buf);
1751 : /* synchronous output report */
1752 0 : ret = hid_hw_output_report(hid, buf, len);
1753 0 : if (ret == -ENOSYS)
1754 0 : hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1755 : HID_REQ_SET_REPORT);
1756 0 : kfree(buf);
1757 : }
1758 :
1759 0 : static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1760 : unsigned int code, int value)
1761 : {
1762 0 : struct hid_device *hid = input_get_drvdata(dev);
1763 : struct hid_field *field;
1764 : int offset;
1765 :
1766 0 : if (type == EV_FF)
1767 0 : return input_ff_event(dev, type, code, value);
1768 :
1769 0 : if (type != EV_LED)
1770 : return -1;
1771 :
1772 0 : if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1773 0 : hid_warn(dev, "event field not found\n");
1774 0 : return -1;
1775 : }
1776 :
1777 0 : hid_set_field(field, offset, value);
1778 :
1779 0 : schedule_work(&hid->led_work);
1780 0 : return 0;
1781 : }
1782 :
1783 0 : static int hidinput_open(struct input_dev *dev)
1784 : {
1785 0 : struct hid_device *hid = input_get_drvdata(dev);
1786 :
1787 0 : return hid_hw_open(hid);
1788 : }
1789 :
1790 0 : static void hidinput_close(struct input_dev *dev)
1791 : {
1792 0 : struct hid_device *hid = input_get_drvdata(dev);
1793 :
1794 0 : hid_hw_close(hid);
1795 0 : }
1796 :
1797 0 : static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1798 : struct hid_report *report, bool use_logical_max)
1799 : {
1800 : struct hid_usage *usage;
1801 0 : bool update_needed = false;
1802 0 : bool get_report_completed = false;
1803 : int i, j;
1804 :
1805 0 : if (report->maxfield == 0)
1806 : return false;
1807 :
1808 0 : for (i = 0; i < report->maxfield; i++) {
1809 0 : __s32 value = use_logical_max ?
1810 0 : report->field[i]->logical_maximum :
1811 0 : report->field[i]->logical_minimum;
1812 :
1813 : /* There is no good reason for a Resolution
1814 : * Multiplier to have a count other than 1.
1815 : * Ignore that case.
1816 : */
1817 0 : if (report->field[i]->report_count != 1)
1818 0 : continue;
1819 :
1820 0 : for (j = 0; j < report->field[i]->maxusage; j++) {
1821 0 : usage = &report->field[i]->usage[j];
1822 :
1823 0 : if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1824 0 : continue;
1825 :
1826 : /*
1827 : * If we have more than one feature within this
1828 : * report we need to fill in the bits from the
1829 : * others before we can overwrite the ones for the
1830 : * Resolution Multiplier.
1831 : *
1832 : * But if we're not allowed to read from the device,
1833 : * we just bail. Such a device should not exist
1834 : * anyway.
1835 : */
1836 0 : if (!get_report_completed && report->maxfield > 1) {
1837 0 : if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1838 : return update_needed;
1839 :
1840 0 : hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1841 : hid_hw_wait(hid);
1842 : get_report_completed = true;
1843 : }
1844 :
1845 0 : report->field[i]->value[j] = value;
1846 0 : update_needed = true;
1847 : }
1848 : }
1849 :
1850 : return update_needed;
1851 : }
1852 :
1853 0 : static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1854 : {
1855 : struct hid_report_enum *rep_enum;
1856 : struct hid_report *rep;
1857 : int ret;
1858 :
1859 0 : rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1860 0 : list_for_each_entry(rep, &rep_enum->report_list, list) {
1861 0 : bool update_needed = __hidinput_change_resolution_multipliers(hid,
1862 : rep, true);
1863 :
1864 0 : if (update_needed) {
1865 0 : ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1866 0 : if (ret) {
1867 0 : __hidinput_change_resolution_multipliers(hid,
1868 : rep, false);
1869 0 : return;
1870 : }
1871 : }
1872 : }
1873 :
1874 : /* refresh our structs */
1875 0 : hid_setup_resolution_multiplier(hid);
1876 : }
1877 :
1878 0 : static void report_features(struct hid_device *hid)
1879 : {
1880 0 : struct hid_driver *drv = hid->driver;
1881 : struct hid_report_enum *rep_enum;
1882 : struct hid_report *rep;
1883 : struct hid_usage *usage;
1884 : int i, j;
1885 :
1886 0 : rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1887 0 : list_for_each_entry(rep, &rep_enum->report_list, list)
1888 0 : for (i = 0; i < rep->maxfield; i++) {
1889 : /* Ignore if report count is out of bounds. */
1890 0 : if (rep->field[i]->report_count < 1)
1891 0 : continue;
1892 :
1893 0 : for (j = 0; j < rep->field[i]->maxusage; j++) {
1894 0 : usage = &rep->field[i]->usage[j];
1895 :
1896 : /* Verify if Battery Strength feature is available */
1897 : if (usage->hid == HID_DC_BATTERYSTRENGTH)
1898 : hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1899 : rep->field[i], false);
1900 :
1901 0 : if (drv->feature_mapping)
1902 0 : drv->feature_mapping(hid, rep->field[i], usage);
1903 : }
1904 : }
1905 0 : }
1906 :
1907 0 : static struct hid_input *hidinput_allocate(struct hid_device *hid,
1908 : unsigned int application)
1909 : {
1910 0 : struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1911 0 : struct input_dev *input_dev = input_allocate_device();
1912 0 : const char *suffix = NULL;
1913 : size_t suffix_len, name_len;
1914 :
1915 0 : if (!hidinput || !input_dev)
1916 : goto fail;
1917 :
1918 0 : if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1919 0 : hid->maxapplication > 1) {
1920 0 : switch (application) {
1921 : case HID_GD_KEYBOARD:
1922 0 : suffix = "Keyboard";
1923 0 : break;
1924 : case HID_GD_KEYPAD:
1925 0 : suffix = "Keypad";
1926 0 : break;
1927 : case HID_GD_MOUSE:
1928 0 : suffix = "Mouse";
1929 0 : break;
1930 : case HID_DG_PEN:
1931 : /*
1932 : * yes, there is an issue here:
1933 : * DG_PEN -> "Stylus"
1934 : * DG_STYLUS -> "Pen"
1935 : * But changing this now means users with config snippets
1936 : * will have to change it and the test suite will not be happy.
1937 : */
1938 0 : suffix = "Stylus";
1939 0 : break;
1940 : case HID_DG_STYLUS:
1941 0 : suffix = "Pen";
1942 0 : break;
1943 : case HID_DG_TOUCHSCREEN:
1944 0 : suffix = "Touchscreen";
1945 0 : break;
1946 : case HID_DG_TOUCHPAD:
1947 0 : suffix = "Touchpad";
1948 0 : break;
1949 : case HID_GD_SYSTEM_CONTROL:
1950 0 : suffix = "System Control";
1951 0 : break;
1952 : case HID_CP_CONSUMER_CONTROL:
1953 0 : suffix = "Consumer Control";
1954 0 : break;
1955 : case HID_GD_WIRELESS_RADIO_CTLS:
1956 0 : suffix = "Wireless Radio Control";
1957 0 : break;
1958 : case HID_GD_SYSTEM_MULTIAXIS:
1959 0 : suffix = "System Multi Axis";
1960 0 : break;
1961 : default:
1962 : break;
1963 : }
1964 : }
1965 :
1966 0 : if (suffix) {
1967 0 : name_len = strlen(hid->name);
1968 0 : suffix_len = strlen(suffix);
1969 0 : if ((name_len < suffix_len) ||
1970 0 : strcmp(hid->name + name_len - suffix_len, suffix)) {
1971 0 : hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1972 : hid->name, suffix);
1973 0 : if (!hidinput->name)
1974 : goto fail;
1975 : }
1976 : }
1977 :
1978 0 : input_set_drvdata(input_dev, hid);
1979 0 : input_dev->event = hidinput_input_event;
1980 0 : input_dev->open = hidinput_open;
1981 0 : input_dev->close = hidinput_close;
1982 0 : input_dev->setkeycode = hidinput_setkeycode;
1983 0 : input_dev->getkeycode = hidinput_getkeycode;
1984 :
1985 0 : input_dev->name = hidinput->name ? hidinput->name : hid->name;
1986 0 : input_dev->phys = hid->phys;
1987 0 : input_dev->uniq = hid->uniq;
1988 0 : input_dev->id.bustype = hid->bus;
1989 0 : input_dev->id.vendor = hid->vendor;
1990 0 : input_dev->id.product = hid->product;
1991 0 : input_dev->id.version = hid->version;
1992 0 : input_dev->dev.parent = &hid->dev;
1993 :
1994 0 : hidinput->input = input_dev;
1995 0 : hidinput->application = application;
1996 0 : list_add_tail(&hidinput->list, &hid->inputs);
1997 :
1998 0 : INIT_LIST_HEAD(&hidinput->reports);
1999 :
2000 0 : return hidinput;
2001 :
2002 : fail:
2003 0 : kfree(hidinput);
2004 0 : input_free_device(input_dev);
2005 0 : hid_err(hid, "Out of memory during hid input probe\n");
2006 0 : return NULL;
2007 : }
2008 :
2009 0 : static bool hidinput_has_been_populated(struct hid_input *hidinput)
2010 : {
2011 : int i;
2012 0 : unsigned long r = 0;
2013 :
2014 0 : for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2015 0 : r |= hidinput->input->evbit[i];
2016 :
2017 0 : for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2018 0 : r |= hidinput->input->keybit[i];
2019 :
2020 0 : for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2021 0 : r |= hidinput->input->relbit[i];
2022 :
2023 0 : for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2024 0 : r |= hidinput->input->absbit[i];
2025 :
2026 0 : for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2027 0 : r |= hidinput->input->mscbit[i];
2028 :
2029 0 : for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2030 0 : r |= hidinput->input->ledbit[i];
2031 :
2032 0 : for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2033 0 : r |= hidinput->input->sndbit[i];
2034 :
2035 0 : for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2036 0 : r |= hidinput->input->ffbit[i];
2037 :
2038 0 : for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2039 0 : r |= hidinput->input->swbit[i];
2040 :
2041 0 : return !!r;
2042 : }
2043 :
2044 0 : static void hidinput_cleanup_hidinput(struct hid_device *hid,
2045 : struct hid_input *hidinput)
2046 : {
2047 : struct hid_report *report;
2048 : int i, k;
2049 :
2050 0 : list_del(&hidinput->list);
2051 0 : input_free_device(hidinput->input);
2052 0 : kfree(hidinput->name);
2053 :
2054 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2055 0 : if (k == HID_OUTPUT_REPORT &&
2056 0 : hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2057 0 : continue;
2058 :
2059 0 : list_for_each_entry(report, &hid->report_enum[k].report_list,
2060 : list) {
2061 :
2062 0 : for (i = 0; i < report->maxfield; i++)
2063 0 : if (report->field[i]->hidinput == hidinput)
2064 0 : report->field[i]->hidinput = NULL;
2065 : }
2066 : }
2067 :
2068 0 : kfree(hidinput);
2069 0 : }
2070 :
2071 : static struct hid_input *hidinput_match(struct hid_report *report)
2072 : {
2073 0 : struct hid_device *hid = report->device;
2074 : struct hid_input *hidinput;
2075 :
2076 0 : list_for_each_entry(hidinput, &hid->inputs, list) {
2077 0 : if (hidinput->report &&
2078 0 : hidinput->report->id == report->id)
2079 : return hidinput;
2080 : }
2081 :
2082 : return NULL;
2083 : }
2084 :
2085 : static struct hid_input *hidinput_match_application(struct hid_report *report)
2086 : {
2087 0 : struct hid_device *hid = report->device;
2088 : struct hid_input *hidinput;
2089 :
2090 0 : list_for_each_entry(hidinput, &hid->inputs, list) {
2091 0 : if (hidinput->application == report->application)
2092 : return hidinput;
2093 :
2094 : /*
2095 : * Keep SystemControl and ConsumerControl applications together
2096 : * with the main keyboard, if present.
2097 : */
2098 0 : if ((report->application == HID_GD_SYSTEM_CONTROL ||
2099 0 : report->application == HID_CP_CONSUMER_CONTROL) &&
2100 : hidinput->application == HID_GD_KEYBOARD) {
2101 : return hidinput;
2102 : }
2103 : }
2104 :
2105 : return NULL;
2106 : }
2107 :
2108 0 : static inline void hidinput_configure_usages(struct hid_input *hidinput,
2109 : struct hid_report *report)
2110 : {
2111 : int i, j, k;
2112 0 : int first_field_index = 0;
2113 0 : int slot_collection_index = -1;
2114 0 : int prev_collection_index = -1;
2115 0 : unsigned int slot_idx = 0;
2116 : struct hid_field *field;
2117 :
2118 : /*
2119 : * First tag all the fields that are part of a slot,
2120 : * a slot needs to have one Contact ID in the collection
2121 : */
2122 0 : for (i = 0; i < report->maxfield; i++) {
2123 0 : field = report->field[i];
2124 :
2125 : /* ignore fields without usage */
2126 0 : if (field->maxusage < 1)
2127 0 : continue;
2128 :
2129 : /*
2130 : * janitoring when collection_index changes
2131 : */
2132 0 : if (prev_collection_index != field->usage->collection_index) {
2133 0 : prev_collection_index = field->usage->collection_index;
2134 0 : first_field_index = i;
2135 : }
2136 :
2137 : /*
2138 : * if we already found a Contact ID in the collection,
2139 : * tag and continue to the next.
2140 : */
2141 0 : if (slot_collection_index == field->usage->collection_index) {
2142 0 : field->slot_idx = slot_idx;
2143 0 : continue;
2144 : }
2145 :
2146 : /* check if the current field has Contact ID */
2147 0 : for (j = 0; j < field->maxusage; j++) {
2148 0 : if (field->usage[j].hid == HID_DG_CONTACTID) {
2149 0 : slot_collection_index = field->usage->collection_index;
2150 0 : slot_idx++;
2151 :
2152 : /*
2153 : * mark all previous fields and this one in the
2154 : * current collection to be slotted.
2155 : */
2156 0 : for (k = first_field_index; k <= i; k++)
2157 0 : report->field[k]->slot_idx = slot_idx;
2158 : break;
2159 : }
2160 : }
2161 : }
2162 :
2163 0 : for (i = 0; i < report->maxfield; i++)
2164 0 : for (j = 0; j < report->field[i]->maxusage; j++)
2165 0 : hidinput_configure_usage(hidinput, report->field[i],
2166 0 : report->field[i]->usage + j,
2167 : j);
2168 0 : }
2169 :
2170 : /*
2171 : * Register the input device; print a message.
2172 : * Configure the input layer interface
2173 : * Read all reports and initialize the absolute field values.
2174 : */
2175 :
2176 0 : int hidinput_connect(struct hid_device *hid, unsigned int force)
2177 : {
2178 0 : struct hid_driver *drv = hid->driver;
2179 : struct hid_report *report;
2180 0 : struct hid_input *next, *hidinput = NULL;
2181 : unsigned int application;
2182 : int i, k;
2183 :
2184 0 : INIT_LIST_HEAD(&hid->inputs);
2185 0 : INIT_WORK(&hid->led_work, hidinput_led_worker);
2186 :
2187 0 : hid->status &= ~HID_STAT_DUP_DETECTED;
2188 :
2189 0 : if (!force) {
2190 0 : for (i = 0; i < hid->maxcollection; i++) {
2191 0 : struct hid_collection *col = &hid->collection[i];
2192 0 : if (col->type == HID_COLLECTION_APPLICATION ||
2193 : col->type == HID_COLLECTION_PHYSICAL)
2194 0 : if (IS_INPUT_APPLICATION(col->usage))
2195 : break;
2196 : }
2197 :
2198 0 : if (i == hid->maxcollection)
2199 : return -1;
2200 : }
2201 :
2202 0 : report_features(hid);
2203 :
2204 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2205 0 : if (k == HID_OUTPUT_REPORT &&
2206 0 : hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2207 0 : continue;
2208 :
2209 0 : list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2210 :
2211 0 : if (!report->maxfield)
2212 0 : continue;
2213 :
2214 0 : application = report->application;
2215 :
2216 : /*
2217 : * Find the previous hidinput report attached
2218 : * to this report id.
2219 : */
2220 0 : if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2221 0 : hidinput = hidinput_match(report);
2222 0 : else if (hid->maxapplication > 1 &&
2223 : (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2224 0 : hidinput = hidinput_match_application(report);
2225 :
2226 0 : if (!hidinput) {
2227 0 : hidinput = hidinput_allocate(hid, application);
2228 0 : if (!hidinput)
2229 : goto out_unwind;
2230 : }
2231 :
2232 0 : hidinput_configure_usages(hidinput, report);
2233 :
2234 0 : if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2235 0 : hidinput->report = report;
2236 :
2237 0 : list_add_tail(&report->hidinput_list,
2238 : &hidinput->reports);
2239 : }
2240 : }
2241 :
2242 0 : hidinput_change_resolution_multipliers(hid);
2243 :
2244 0 : list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2245 0 : if (drv->input_configured &&
2246 0 : drv->input_configured(hid, hidinput))
2247 : goto out_unwind;
2248 :
2249 0 : if (!hidinput_has_been_populated(hidinput)) {
2250 : /* no need to register an input device not populated */
2251 0 : hidinput_cleanup_hidinput(hid, hidinput);
2252 0 : continue;
2253 : }
2254 :
2255 0 : if (input_register_device(hidinput->input))
2256 : goto out_unwind;
2257 0 : hidinput->registered = true;
2258 : }
2259 :
2260 0 : if (list_empty(&hid->inputs)) {
2261 0 : hid_err(hid, "No inputs registered, leaving\n");
2262 0 : goto out_unwind;
2263 : }
2264 :
2265 : if (hid->status & HID_STAT_DUP_DETECTED)
2266 : hid_dbg(hid,
2267 : "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2268 :
2269 : return 0;
2270 :
2271 : out_unwind:
2272 : /* unwind the ones we already registered */
2273 0 : hidinput_disconnect(hid);
2274 :
2275 0 : return -1;
2276 : }
2277 : EXPORT_SYMBOL_GPL(hidinput_connect);
2278 :
2279 0 : void hidinput_disconnect(struct hid_device *hid)
2280 : {
2281 : struct hid_input *hidinput, *next;
2282 :
2283 0 : hidinput_cleanup_battery(hid);
2284 :
2285 0 : list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2286 0 : list_del(&hidinput->list);
2287 0 : if (hidinput->registered)
2288 0 : input_unregister_device(hidinput->input);
2289 : else
2290 0 : input_free_device(hidinput->input);
2291 0 : kfree(hidinput->name);
2292 0 : kfree(hidinput);
2293 : }
2294 :
2295 : /* led_work is spawned by input_dev callbacks, but doesn't access the
2296 : * parent input_dev at all. Once all input devices are removed, we
2297 : * know that led_work will never get restarted, so we can cancel it
2298 : * synchronously and are safe. */
2299 0 : cancel_work_sync(&hid->led_work);
2300 0 : }
2301 : EXPORT_SYMBOL_GPL(hidinput_disconnect);
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