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 default:
307 return 0;
308 }
309
310 /* Apply negative unit exponent */
311 for (; unit_exponent < 0; unit_exponent++) {
312 prev = logical_extents;
313 logical_extents *= 10;
314 if (logical_extents < prev)
315 return 0;
316 }
317 /* Apply positive unit exponent */
318 for (; unit_exponent > 0; unit_exponent--) {
319 prev = physical_extents;
320 physical_extents *= 10;
321 if (physical_extents < prev)
322 return 0;
323 }
324
325 /* Calculate resolution */
326 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 #define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */
344
345 static const struct hid_device_id hid_battery_quirks[] = {
346 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
347 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
348 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
349 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
350 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
351 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
352 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
353 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
354 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
355 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
356 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
357 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
358 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
359 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
360 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
361 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
362 USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
363 HID_BATTERY_QUIRK_IGNORE },
364 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
365 USB_DEVICE_ID_ELECOM_BM084),
366 HID_BATTERY_QUIRK_IGNORE },
367 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
368 USB_DEVICE_ID_SYMBOL_SCANNER_3),
369 HID_BATTERY_QUIRK_IGNORE },
370 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
371 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
372 HID_BATTERY_QUIRK_IGNORE },
373 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
374 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
375 HID_BATTERY_QUIRK_IGNORE },
376 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
377 HID_BATTERY_QUIRK_IGNORE },
378 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_GV301RA_TOUCHSCREEN),
379 HID_BATTERY_QUIRK_IGNORE },
380 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
381 HID_BATTERY_QUIRK_IGNORE },
382 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
383 HID_BATTERY_QUIRK_IGNORE },
384 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
385 HID_BATTERY_QUIRK_AVOID_QUERY },
386 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
387 HID_BATTERY_QUIRK_AVOID_QUERY },
388 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
389 HID_BATTERY_QUIRK_AVOID_QUERY },
390 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
391 HID_BATTERY_QUIRK_IGNORE },
392 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
393 HID_BATTERY_QUIRK_IGNORE },
394 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
395 HID_BATTERY_QUIRK_IGNORE },
396 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
397 HID_BATTERY_QUIRK_IGNORE },
398 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
399 HID_BATTERY_QUIRK_IGNORE },
400 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
401 HID_BATTERY_QUIRK_IGNORE },
402 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
403 HID_BATTERY_QUIRK_IGNORE },
404 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
405 HID_BATTERY_QUIRK_IGNORE },
406 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13T_AW100),
407 HID_BATTERY_QUIRK_IGNORE },
408 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V1),
409 HID_BATTERY_QUIRK_IGNORE },
410 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V2),
411 HID_BATTERY_QUIRK_IGNORE },
412 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15_EU0556NG),
413 HID_BATTERY_QUIRK_IGNORE },
414 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
415 HID_BATTERY_QUIRK_AVOID_QUERY },
416 {}
417 };
418
find_battery_quirk(struct hid_device * hdev)419 static unsigned find_battery_quirk(struct hid_device *hdev)
420 {
421 unsigned quirks = 0;
422 const struct hid_device_id *match;
423
424 match = hid_match_id(hdev, hid_battery_quirks);
425 if (match != NULL)
426 quirks = match->driver_data;
427
428 return quirks;
429 }
430
hidinput_scale_battery_capacity(struct hid_device * dev,int value)431 static int hidinput_scale_battery_capacity(struct hid_device *dev,
432 int value)
433 {
434 if (dev->battery_min < dev->battery_max &&
435 value >= dev->battery_min && value <= dev->battery_max)
436 value = ((value - dev->battery_min) * 100) /
437 (dev->battery_max - dev->battery_min);
438
439 return value;
440 }
441
hidinput_query_battery_capacity(struct hid_device * dev)442 static int hidinput_query_battery_capacity(struct hid_device *dev)
443 {
444 u8 *buf;
445 int ret;
446
447 buf = kmalloc(4, GFP_KERNEL);
448 if (!buf)
449 return -ENOMEM;
450
451 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
452 dev->battery_report_type, HID_REQ_GET_REPORT);
453 if (ret < 2) {
454 kfree(buf);
455 return -ENODATA;
456 }
457
458 ret = hidinput_scale_battery_capacity(dev, buf[1]);
459 kfree(buf);
460 return ret;
461 }
462
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)463 static int hidinput_get_battery_property(struct power_supply *psy,
464 enum power_supply_property prop,
465 union power_supply_propval *val)
466 {
467 struct hid_device *dev = power_supply_get_drvdata(psy);
468 int value;
469 int ret = 0;
470
471 switch (prop) {
472 case POWER_SUPPLY_PROP_PRESENT:
473 case POWER_SUPPLY_PROP_ONLINE:
474 val->intval = 1;
475 break;
476
477 case POWER_SUPPLY_PROP_CAPACITY:
478 if (dev->battery_status != HID_BATTERY_REPORTED &&
479 !dev->battery_avoid_query) {
480 value = hidinput_query_battery_capacity(dev);
481 if (value < 0)
482 return value;
483 } else {
484 value = dev->battery_capacity;
485 }
486
487 val->intval = value;
488 break;
489
490 case POWER_SUPPLY_PROP_MODEL_NAME:
491 val->strval = dev->name;
492 break;
493
494 case POWER_SUPPLY_PROP_STATUS:
495 if (dev->battery_status != HID_BATTERY_REPORTED &&
496 !dev->battery_avoid_query) {
497 value = hidinput_query_battery_capacity(dev);
498 if (value < 0)
499 return value;
500
501 dev->battery_capacity = value;
502 dev->battery_status = HID_BATTERY_QUERIED;
503 }
504
505 if (dev->battery_status == HID_BATTERY_UNKNOWN)
506 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
507 else
508 val->intval = dev->battery_charge_status;
509 break;
510
511 case POWER_SUPPLY_PROP_SCOPE:
512 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
513 break;
514
515 default:
516 ret = -EINVAL;
517 break;
518 }
519
520 return ret;
521 }
522
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)523 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
524 struct hid_field *field, bool is_percentage)
525 {
526 struct power_supply_desc *psy_desc;
527 struct power_supply_config psy_cfg = { .drv_data = dev, };
528 unsigned quirks;
529 s32 min, max;
530 int error;
531
532 if (dev->battery)
533 return 0; /* already initialized? */
534
535 quirks = find_battery_quirk(dev);
536
537 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
538 dev->bus, dev->vendor, dev->product, dev->version, quirks);
539
540 if (quirks & HID_BATTERY_QUIRK_IGNORE)
541 return 0;
542
543 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
544 if (!psy_desc)
545 return -ENOMEM;
546
547 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
548 strlen(dev->uniq) ?
549 dev->uniq : dev_name(&dev->dev));
550 if (!psy_desc->name) {
551 error = -ENOMEM;
552 goto err_free_mem;
553 }
554
555 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
556 psy_desc->properties = hidinput_battery_props;
557 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
558 psy_desc->use_for_apm = 0;
559 psy_desc->get_property = hidinput_get_battery_property;
560
561 min = field->logical_minimum;
562 max = field->logical_maximum;
563
564 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
565 min = 0;
566 max = 100;
567 }
568
569 if (quirks & HID_BATTERY_QUIRK_FEATURE)
570 report_type = HID_FEATURE_REPORT;
571
572 dev->battery_min = min;
573 dev->battery_max = max;
574 dev->battery_report_type = report_type;
575 dev->battery_report_id = field->report->id;
576 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
577
578 /*
579 * Stylus is normally not connected to the device and thus we
580 * can't query the device and get meaningful battery strength.
581 * We have to wait for the device to report it on its own.
582 */
583 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
584 field->physical == HID_DG_STYLUS;
585
586 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
587 dev->battery_avoid_query = true;
588
589 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
590 if (IS_ERR(dev->battery)) {
591 error = PTR_ERR(dev->battery);
592 hid_warn(dev, "can't register power supply: %d\n", error);
593 goto err_free_name;
594 }
595
596 power_supply_powers(dev->battery, &dev->dev);
597 return 0;
598
599 err_free_name:
600 kfree(psy_desc->name);
601 err_free_mem:
602 kfree(psy_desc);
603 dev->battery = NULL;
604 return error;
605 }
606
hidinput_cleanup_battery(struct hid_device * dev)607 static void hidinput_cleanup_battery(struct hid_device *dev)
608 {
609 const struct power_supply_desc *psy_desc;
610
611 if (!dev->battery)
612 return;
613
614 psy_desc = dev->battery->desc;
615 power_supply_unregister(dev->battery);
616 kfree(psy_desc->name);
617 kfree(psy_desc);
618 dev->battery = NULL;
619 }
620
hidinput_update_battery(struct hid_device * dev,int value)621 static void hidinput_update_battery(struct hid_device *dev, int value)
622 {
623 int capacity;
624
625 if (!dev->battery)
626 return;
627
628 if (value == 0 || value < dev->battery_min || value > dev->battery_max)
629 return;
630
631 capacity = hidinput_scale_battery_capacity(dev, value);
632
633 if (dev->battery_status != HID_BATTERY_REPORTED ||
634 capacity != dev->battery_capacity ||
635 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
636 dev->battery_capacity = capacity;
637 dev->battery_status = HID_BATTERY_REPORTED;
638 dev->battery_ratelimit_time =
639 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
640 power_supply_changed(dev->battery);
641 }
642 }
643
hidinput_set_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)644 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
645 unsigned int usage, int value)
646 {
647 switch (usage) {
648 case HID_BAT_CHARGING:
649 dev->battery_charge_status = value ?
650 POWER_SUPPLY_STATUS_CHARGING :
651 POWER_SUPPLY_STATUS_DISCHARGING;
652 return true;
653 }
654
655 return false;
656 }
657 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)658 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
659 struct hid_field *field, bool is_percentage)
660 {
661 return 0;
662 }
663
hidinput_cleanup_battery(struct hid_device * dev)664 static void hidinput_cleanup_battery(struct hid_device *dev)
665 {
666 }
667
hidinput_update_battery(struct hid_device * dev,int value)668 static void hidinput_update_battery(struct hid_device *dev, int value)
669 {
670 }
671
hidinput_set_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)672 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
673 unsigned int usage, int value)
674 {
675 return false;
676 }
677 #endif /* CONFIG_HID_BATTERY_STRENGTH */
678
hidinput_field_in_collection(struct hid_device * device,struct hid_field * field,unsigned int type,unsigned int usage)679 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
680 unsigned int type, unsigned int usage)
681 {
682 struct hid_collection *collection;
683
684 collection = &device->collection[field->usage->collection_index];
685
686 return collection->type == type && collection->usage == usage;
687 }
688
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage,unsigned int usage_index)689 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
690 struct hid_usage *usage, unsigned int usage_index)
691 {
692 struct input_dev *input = hidinput->input;
693 struct hid_device *device = input_get_drvdata(input);
694 const struct usage_priority *usage_priority = NULL;
695 int max = 0, code;
696 unsigned int i = 0;
697 unsigned long *bit = NULL;
698
699 field->hidinput = hidinput;
700
701 if (field->flags & HID_MAIN_ITEM_CONSTANT)
702 goto ignore;
703
704 /* Ignore if report count is out of bounds. */
705 if (field->report_count < 1)
706 goto ignore;
707
708 /* only LED usages are supported in output fields */
709 if (field->report_type == HID_OUTPUT_REPORT &&
710 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
711 goto ignore;
712 }
713
714 /* assign a priority based on the static list declared here */
715 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
716 if (usage->hid == hidinput_usages_priorities[i].usage) {
717 usage_priority = &hidinput_usages_priorities[i];
718
719 field->usages_priorities[usage_index] =
720 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
721 break;
722 }
723 }
724
725 /*
726 * For slotted devices, we need to also add the slot index
727 * in the priority.
728 */
729 if (usage_priority && usage_priority->global)
730 field->usages_priorities[usage_index] |=
731 usage_priority->slot_overwrite;
732 else
733 field->usages_priorities[usage_index] |=
734 (0xff - field->slot_idx) << 16;
735
736 if (device->driver->input_mapping) {
737 int ret = device->driver->input_mapping(device, hidinput, field,
738 usage, &bit, &max);
739 if (ret > 0)
740 goto mapped;
741 if (ret < 0)
742 goto ignore;
743 }
744
745 switch (usage->hid & HID_USAGE_PAGE) {
746 case HID_UP_UNDEFINED:
747 goto ignore;
748
749 case HID_UP_KEYBOARD:
750 set_bit(EV_REP, input->evbit);
751
752 if ((usage->hid & HID_USAGE) < 256) {
753 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
754 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
755 } else
756 map_key(KEY_UNKNOWN);
757
758 break;
759
760 case HID_UP_BUTTON:
761 code = ((usage->hid - 1) & HID_USAGE);
762
763 switch (field->application) {
764 case HID_GD_MOUSE:
765 case HID_GD_POINTER: code += BTN_MOUSE; break;
766 case HID_GD_JOYSTICK:
767 if (code <= 0xf)
768 code += BTN_JOYSTICK;
769 else
770 code += BTN_TRIGGER_HAPPY - 0x10;
771 break;
772 case HID_GD_GAMEPAD:
773 if (code <= 0xf)
774 code += BTN_GAMEPAD;
775 else
776 code += BTN_TRIGGER_HAPPY - 0x10;
777 break;
778 case HID_CP_CONSUMER_CONTROL:
779 if (hidinput_field_in_collection(device, field,
780 HID_COLLECTION_NAMED_ARRAY,
781 HID_CP_PROGRAMMABLEBUTTONS)) {
782 if (code <= 0x1d)
783 code += KEY_MACRO1;
784 else
785 code += BTN_TRIGGER_HAPPY - 0x1e;
786 break;
787 }
788 fallthrough;
789 default:
790 switch (field->physical) {
791 case HID_GD_MOUSE:
792 case HID_GD_POINTER: code += BTN_MOUSE; break;
793 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
794 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
795 default: code += BTN_MISC;
796 }
797 }
798
799 map_key(code);
800 break;
801
802 case HID_UP_SIMULATION:
803 switch (usage->hid & 0xffff) {
804 case 0xba: map_abs(ABS_RUDDER); break;
805 case 0xbb: map_abs(ABS_THROTTLE); break;
806 case 0xc4: map_abs(ABS_GAS); break;
807 case 0xc5: map_abs(ABS_BRAKE); break;
808 case 0xc8: map_abs(ABS_WHEEL); break;
809 default: goto ignore;
810 }
811 break;
812
813 case HID_UP_GENDESK:
814 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
815 switch (usage->hid & 0xf) {
816 case 0x1: map_key_clear(KEY_POWER); break;
817 case 0x2: map_key_clear(KEY_SLEEP); break;
818 case 0x3: map_key_clear(KEY_WAKEUP); break;
819 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
820 case 0x5: map_key_clear(KEY_MENU); break;
821 case 0x6: map_key_clear(KEY_PROG1); break;
822 case 0x7: map_key_clear(KEY_HELP); break;
823 case 0x8: map_key_clear(KEY_EXIT); break;
824 case 0x9: map_key_clear(KEY_SELECT); break;
825 case 0xa: map_key_clear(KEY_RIGHT); break;
826 case 0xb: map_key_clear(KEY_LEFT); break;
827 case 0xc: map_key_clear(KEY_UP); break;
828 case 0xd: map_key_clear(KEY_DOWN); break;
829 case 0xe: map_key_clear(KEY_POWER2); break;
830 case 0xf: map_key_clear(KEY_RESTART); break;
831 default: goto unknown;
832 }
833 break;
834 }
835
836 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
837 switch (usage->hid & 0xf) {
838 case 0x9: map_key_clear(KEY_MICMUTE); break;
839 default: goto ignore;
840 }
841 break;
842 }
843
844 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
845 switch (usage->hid & 0xf) {
846 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
847 default: goto ignore;
848 }
849 break;
850 }
851
852 /*
853 * Some lazy vendors declare 255 usages for System Control,
854 * leading to the creation of ABS_X|Y axis and too many others.
855 * It wouldn't be a problem if joydev doesn't consider the
856 * device as a joystick then.
857 */
858 if (field->application == HID_GD_SYSTEM_CONTROL)
859 goto ignore;
860
861 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
862 switch (usage->hid) {
863 case HID_GD_UP: usage->hat_dir = 1; break;
864 case HID_GD_DOWN: usage->hat_dir = 5; break;
865 case HID_GD_RIGHT: usage->hat_dir = 3; break;
866 case HID_GD_LEFT: usage->hat_dir = 7; break;
867 default: goto unknown;
868 }
869 if (field->dpad) {
870 map_abs(field->dpad);
871 goto ignore;
872 }
873 map_abs(ABS_HAT0X);
874 break;
875 }
876
877 switch (usage->hid) {
878 /* These usage IDs map directly to the usage codes. */
879 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
880 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
881 if (field->flags & HID_MAIN_ITEM_RELATIVE)
882 map_rel(usage->hid & 0xf);
883 else
884 map_abs_clear(usage->hid & 0xf);
885 break;
886
887 case HID_GD_WHEEL:
888 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
889 set_bit(REL_WHEEL, input->relbit);
890 map_rel(REL_WHEEL_HI_RES);
891 } else {
892 map_abs(usage->hid & 0xf);
893 }
894 break;
895 case HID_GD_SLIDER: case HID_GD_DIAL:
896 if (field->flags & HID_MAIN_ITEM_RELATIVE)
897 map_rel(usage->hid & 0xf);
898 else
899 map_abs(usage->hid & 0xf);
900 break;
901
902 case HID_GD_HATSWITCH:
903 usage->hat_min = field->logical_minimum;
904 usage->hat_max = field->logical_maximum;
905 map_abs(ABS_HAT0X);
906 break;
907
908 case HID_GD_START: map_key_clear(BTN_START); break;
909 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
910
911 case HID_GD_RFKILL_BTN:
912 /* MS wireless radio ctl extension, also check CA */
913 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
914 map_key_clear(KEY_RFKILL);
915 /* We need to simulate the btn release */
916 field->flags |= HID_MAIN_ITEM_RELATIVE;
917 break;
918 }
919 goto unknown;
920
921 default: goto unknown;
922 }
923
924 break;
925
926 case HID_UP_LED:
927 switch (usage->hid & 0xffff) { /* HID-Value: */
928 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
929 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
930 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
931 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
932 case 0x05: map_led (LED_KANA); break; /* "Kana" */
933 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
934 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
935 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
936 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
937 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
938 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
939
940 default: goto ignore;
941 }
942 break;
943
944 case HID_UP_DIGITIZER:
945 if ((field->application & 0xff) == 0x01) /* Digitizer */
946 __set_bit(INPUT_PROP_POINTER, input->propbit);
947 else if ((field->application & 0xff) == 0x02) /* Pen */
948 __set_bit(INPUT_PROP_DIRECT, input->propbit);
949
950 switch (usage->hid & 0xff) {
951 case 0x00: /* Undefined */
952 goto ignore;
953
954 case 0x30: /* TipPressure */
955 if (!test_bit(BTN_TOUCH, input->keybit)) {
956 device->quirks |= HID_QUIRK_NOTOUCH;
957 set_bit(EV_KEY, input->evbit);
958 set_bit(BTN_TOUCH, input->keybit);
959 }
960 map_abs_clear(ABS_PRESSURE);
961 break;
962
963 case 0x32: /* InRange */
964 switch (field->physical) {
965 case HID_DG_PUCK:
966 map_key(BTN_TOOL_MOUSE);
967 break;
968 case HID_DG_FINGER:
969 map_key(BTN_TOOL_FINGER);
970 break;
971 default:
972 /*
973 * If the physical is not given,
974 * rely on the application.
975 */
976 if (!field->physical) {
977 switch (field->application) {
978 case HID_DG_TOUCHSCREEN:
979 case HID_DG_TOUCHPAD:
980 map_key_clear(BTN_TOOL_FINGER);
981 break;
982 default:
983 map_key_clear(BTN_TOOL_PEN);
984 }
985 } else {
986 map_key(BTN_TOOL_PEN);
987 }
988 break;
989 }
990 break;
991
992 case 0x3b: /* Battery Strength */
993 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
994 usage->type = EV_PWR;
995 return;
996
997 case 0x3c: /* Invert */
998 device->quirks &= ~HID_QUIRK_NOINVERT;
999 map_key_clear(BTN_TOOL_RUBBER);
1000 break;
1001
1002 case 0x3d: /* X Tilt */
1003 map_abs_clear(ABS_TILT_X);
1004 break;
1005
1006 case 0x3e: /* Y Tilt */
1007 map_abs_clear(ABS_TILT_Y);
1008 break;
1009
1010 case 0x33: /* Touch */
1011 case 0x42: /* TipSwitch */
1012 case 0x43: /* TipSwitch2 */
1013 device->quirks &= ~HID_QUIRK_NOTOUCH;
1014 map_key_clear(BTN_TOUCH);
1015 break;
1016
1017 case 0x44: /* BarrelSwitch */
1018 map_key_clear(BTN_STYLUS);
1019 break;
1020
1021 case 0x45: /* ERASER */
1022 /*
1023 * This event is reported when eraser tip touches the surface.
1024 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1025 * by Invert if tool reports proximity or by Eraser directly.
1026 */
1027 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1028 device->quirks |= HID_QUIRK_NOINVERT;
1029 set_bit(BTN_TOOL_RUBBER, input->keybit);
1030 }
1031 map_key_clear(BTN_TOUCH);
1032 break;
1033
1034 case 0x46: /* TabletPick */
1035 case 0x5a: /* SecondaryBarrelSwitch */
1036 map_key_clear(BTN_STYLUS2);
1037 break;
1038
1039 case 0x5b: /* TransducerSerialNumber */
1040 case 0x6e: /* TransducerSerialNumber2 */
1041 map_msc(MSC_SERIAL);
1042 break;
1043
1044 default: goto unknown;
1045 }
1046 break;
1047
1048 case HID_UP_TELEPHONY:
1049 switch (usage->hid & HID_USAGE) {
1050 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1051 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1052 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1053 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1054 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1055 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1056 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1057 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1058 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1059 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1060 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1061 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1062 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1063 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1064 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1065 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1066 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1067 default: goto ignore;
1068 }
1069 break;
1070
1071 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1072 switch (usage->hid & HID_USAGE) {
1073 case 0x000: goto ignore;
1074 case 0x030: map_key_clear(KEY_POWER); break;
1075 case 0x031: map_key_clear(KEY_RESTART); break;
1076 case 0x032: map_key_clear(KEY_SLEEP); break;
1077 case 0x034: map_key_clear(KEY_SLEEP); break;
1078 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1079 case 0x036: map_key_clear(BTN_MISC); break;
1080
1081 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1082 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1083 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1084 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1085 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1086 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1087 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1088 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1089 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1090
1091 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1092 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1093 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1094 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1095 case 0x069: map_key_clear(KEY_RED); break;
1096 case 0x06a: map_key_clear(KEY_GREEN); break;
1097 case 0x06b: map_key_clear(KEY_BLUE); break;
1098 case 0x06c: map_key_clear(KEY_YELLOW); break;
1099 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1100
1101 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1102 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1103 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1104 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1105 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1106 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1107
1108 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1109 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1110 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1111
1112 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1113 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1114 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1115
1116 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1117 case 0x083: map_key_clear(KEY_LAST); break;
1118 case 0x084: map_key_clear(KEY_ENTER); break;
1119 case 0x088: map_key_clear(KEY_PC); break;
1120 case 0x089: map_key_clear(KEY_TV); break;
1121 case 0x08a: map_key_clear(KEY_WWW); break;
1122 case 0x08b: map_key_clear(KEY_DVD); break;
1123 case 0x08c: map_key_clear(KEY_PHONE); break;
1124 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1125 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1126 case 0x08f: map_key_clear(KEY_GAMES); break;
1127 case 0x090: map_key_clear(KEY_MEMO); break;
1128 case 0x091: map_key_clear(KEY_CD); break;
1129 case 0x092: map_key_clear(KEY_VCR); break;
1130 case 0x093: map_key_clear(KEY_TUNER); break;
1131 case 0x094: map_key_clear(KEY_EXIT); break;
1132 case 0x095: map_key_clear(KEY_HELP); break;
1133 case 0x096: map_key_clear(KEY_TAPE); break;
1134 case 0x097: map_key_clear(KEY_TV2); break;
1135 case 0x098: map_key_clear(KEY_SAT); break;
1136 case 0x09a: map_key_clear(KEY_PVR); break;
1137
1138 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1139 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1140 case 0x0a0: map_key_clear(KEY_VCR2); break;
1141
1142 case 0x0b0: map_key_clear(KEY_PLAY); break;
1143 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1144 case 0x0b2: map_key_clear(KEY_RECORD); break;
1145 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1146 case 0x0b4: map_key_clear(KEY_REWIND); break;
1147 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1148 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1149 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1150 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1151 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1152 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1153 case 0x0bf: map_key_clear(KEY_SLOW); break;
1154
1155 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1156 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1157
1158 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1159 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1160
1161 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1162 case 0x0e2: map_key_clear(KEY_MUTE); break;
1163 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1164 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1165 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1166 case 0x0f5: map_key_clear(KEY_SLOW); break;
1167
1168 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1169 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1170 case 0x183: map_key_clear(KEY_CONFIG); break;
1171 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1172 case 0x185: map_key_clear(KEY_EDITOR); break;
1173 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1174 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1175 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1176 case 0x189: map_key_clear(KEY_DATABASE); break;
1177 case 0x18a: map_key_clear(KEY_MAIL); break;
1178 case 0x18b: map_key_clear(KEY_NEWS); break;
1179 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1180 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1181 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1182 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1183 case 0x190: map_key_clear(KEY_JOURNAL); break;
1184 case 0x191: map_key_clear(KEY_FINANCE); break;
1185 case 0x192: map_key_clear(KEY_CALC); break;
1186 case 0x193: map_key_clear(KEY_PLAYER); break;
1187 case 0x194: map_key_clear(KEY_FILE); break;
1188 case 0x196: map_key_clear(KEY_WWW); break;
1189 case 0x199: map_key_clear(KEY_CHAT); break;
1190 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1191 case 0x19e: map_key_clear(KEY_COFFEE); break;
1192 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1193 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1194 case 0x1a3: map_key_clear(KEY_NEXT); break;
1195 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1196 case 0x1a6: map_key_clear(KEY_HELP); break;
1197 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1198 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1199 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1200 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1201 case 0x1b4: map_key_clear(KEY_FILE); break;
1202 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1203 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1204 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1205 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1206 case 0x1bd: map_key_clear(KEY_INFO); break;
1207 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1208 case 0x201: map_key_clear(KEY_NEW); break;
1209 case 0x202: map_key_clear(KEY_OPEN); break;
1210 case 0x203: map_key_clear(KEY_CLOSE); break;
1211 case 0x204: map_key_clear(KEY_EXIT); break;
1212 case 0x207: map_key_clear(KEY_SAVE); break;
1213 case 0x208: map_key_clear(KEY_PRINT); break;
1214 case 0x209: map_key_clear(KEY_PROPS); break;
1215 case 0x21a: map_key_clear(KEY_UNDO); break;
1216 case 0x21b: map_key_clear(KEY_COPY); break;
1217 case 0x21c: map_key_clear(KEY_CUT); break;
1218 case 0x21d: map_key_clear(KEY_PASTE); break;
1219 case 0x21f: map_key_clear(KEY_FIND); break;
1220 case 0x221: map_key_clear(KEY_SEARCH); break;
1221 case 0x222: map_key_clear(KEY_GOTO); break;
1222 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1223 case 0x224: map_key_clear(KEY_BACK); break;
1224 case 0x225: map_key_clear(KEY_FORWARD); break;
1225 case 0x226: map_key_clear(KEY_STOP); break;
1226 case 0x227: map_key_clear(KEY_REFRESH); break;
1227 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1228 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1229 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1230 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1231 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1232 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1233 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1234 case 0x238: /* AC Pan */
1235 set_bit(REL_HWHEEL, input->relbit);
1236 map_rel(REL_HWHEEL_HI_RES);
1237 break;
1238 case 0x23d: map_key_clear(KEY_EDIT); break;
1239 case 0x25f: map_key_clear(KEY_CANCEL); break;
1240 case 0x269: map_key_clear(KEY_INSERT); break;
1241 case 0x26a: map_key_clear(KEY_DELETE); break;
1242 case 0x279: map_key_clear(KEY_REDO); break;
1243
1244 case 0x289: map_key_clear(KEY_REPLY); break;
1245 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1246 case 0x28c: map_key_clear(KEY_SEND); break;
1247
1248 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1249
1250 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1251
1252 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1253 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1254 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1255 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1256 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1257 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1258
1259 case 0x29f: map_key_clear(KEY_SCALE); break;
1260
1261 default: map_key_clear(KEY_UNKNOWN);
1262 }
1263 break;
1264
1265 case HID_UP_GENDEVCTRLS:
1266 switch (usage->hid) {
1267 case HID_DC_BATTERYSTRENGTH:
1268 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1269 usage->type = EV_PWR;
1270 return;
1271 }
1272 goto unknown;
1273
1274 case HID_UP_BATTERY:
1275 switch (usage->hid) {
1276 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1277 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1278 usage->type = EV_PWR;
1279 return;
1280 case HID_BAT_CHARGING:
1281 usage->type = EV_PWR;
1282 return;
1283 }
1284 goto unknown;
1285 case HID_UP_CAMERA:
1286 switch (usage->hid & HID_USAGE) {
1287 case 0x020:
1288 map_key_clear(KEY_CAMERA_FOCUS); break;
1289 case 0x021:
1290 map_key_clear(KEY_CAMERA); break;
1291 default:
1292 goto ignore;
1293 }
1294 break;
1295
1296 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1297 set_bit(EV_REP, input->evbit);
1298 switch (usage->hid & HID_USAGE) {
1299 case 0x021: map_key_clear(KEY_PRINT); break;
1300 case 0x070: map_key_clear(KEY_HP); break;
1301 case 0x071: map_key_clear(KEY_CAMERA); break;
1302 case 0x072: map_key_clear(KEY_SOUND); break;
1303 case 0x073: map_key_clear(KEY_QUESTION); break;
1304 case 0x080: map_key_clear(KEY_EMAIL); break;
1305 case 0x081: map_key_clear(KEY_CHAT); break;
1306 case 0x082: map_key_clear(KEY_SEARCH); break;
1307 case 0x083: map_key_clear(KEY_CONNECT); break;
1308 case 0x084: map_key_clear(KEY_FINANCE); break;
1309 case 0x085: map_key_clear(KEY_SPORT); break;
1310 case 0x086: map_key_clear(KEY_SHOP); break;
1311 default: goto ignore;
1312 }
1313 break;
1314
1315 case HID_UP_HPVENDOR2:
1316 set_bit(EV_REP, input->evbit);
1317 switch (usage->hid & HID_USAGE) {
1318 case 0x001: map_key_clear(KEY_MICMUTE); break;
1319 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1320 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1321 default: goto ignore;
1322 }
1323 break;
1324
1325 case HID_UP_MSVENDOR:
1326 goto ignore;
1327
1328 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1329 set_bit(EV_REP, input->evbit);
1330 goto ignore;
1331
1332 case HID_UP_LOGIVENDOR:
1333 /* intentional fallback */
1334 case HID_UP_LOGIVENDOR2:
1335 /* intentional fallback */
1336 case HID_UP_LOGIVENDOR3:
1337 goto ignore;
1338
1339 case HID_UP_PID:
1340 switch (usage->hid & HID_USAGE) {
1341 case 0xa4: map_key_clear(BTN_DEAD); break;
1342 default: goto ignore;
1343 }
1344 break;
1345
1346 default:
1347 unknown:
1348 if (field->report_size == 1) {
1349 if (field->report->type == HID_OUTPUT_REPORT) {
1350 map_led(LED_MISC);
1351 break;
1352 }
1353 map_key(BTN_MISC);
1354 break;
1355 }
1356 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1357 map_rel(REL_MISC);
1358 break;
1359 }
1360 map_abs(ABS_MISC);
1361 break;
1362 }
1363
1364 mapped:
1365 /* Mapping failed, bail out */
1366 if (!bit)
1367 return;
1368
1369 if (device->driver->input_mapped &&
1370 device->driver->input_mapped(device, hidinput, field, usage,
1371 &bit, &max) < 0) {
1372 /*
1373 * The driver indicated that no further generic handling
1374 * of the usage is desired.
1375 */
1376 return;
1377 }
1378
1379 set_bit(usage->type, input->evbit);
1380
1381 /*
1382 * This part is *really* controversial:
1383 * - HID aims at being generic so we should do our best to export
1384 * all incoming events
1385 * - HID describes what events are, so there is no reason for ABS_X
1386 * to be mapped to ABS_Y
1387 * - HID is using *_MISC+N as a default value, but nothing prevents
1388 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1389 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1390 * processing)
1391 *
1392 * If devices still want to use this (at their own risk), they will
1393 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1394 * the default should be a reliable mapping.
1395 */
1396 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1397 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1398 usage->code = find_next_zero_bit(bit,
1399 max + 1,
1400 usage->code);
1401 } else {
1402 device->status |= HID_STAT_DUP_DETECTED;
1403 goto ignore;
1404 }
1405 }
1406
1407 if (usage->code > max)
1408 goto ignore;
1409
1410 if (usage->type == EV_ABS) {
1411
1412 int a = field->logical_minimum;
1413 int b = field->logical_maximum;
1414
1415 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1416 a = field->logical_minimum = 0;
1417 b = field->logical_maximum = 255;
1418 }
1419
1420 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1421 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1422 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1423
1424 input_abs_set_res(input, usage->code,
1425 hidinput_calc_abs_res(field, usage->code));
1426
1427 /* use a larger default input buffer for MT devices */
1428 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1429 input_set_events_per_packet(input, 60);
1430 }
1431
1432 if (usage->type == EV_ABS &&
1433 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1434 int i;
1435 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1436 input_set_abs_params(input, i, -1, 1, 0, 0);
1437 set_bit(i, input->absbit);
1438 }
1439 if (usage->hat_dir && !field->dpad)
1440 field->dpad = usage->code;
1441 }
1442
1443 /* for those devices which produce Consumer volume usage as relative,
1444 * we emulate pressing volumeup/volumedown appropriate number of times
1445 * in hidinput_hid_event()
1446 */
1447 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1448 (usage->code == ABS_VOLUME)) {
1449 set_bit(KEY_VOLUMEUP, input->keybit);
1450 set_bit(KEY_VOLUMEDOWN, input->keybit);
1451 }
1452
1453 if (usage->type == EV_KEY) {
1454 set_bit(EV_MSC, input->evbit);
1455 set_bit(MSC_SCAN, input->mscbit);
1456 }
1457
1458 return;
1459
1460 ignore:
1461 usage->type = 0;
1462 usage->code = 0;
1463 }
1464
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1465 static void hidinput_handle_scroll(struct hid_usage *usage,
1466 struct input_dev *input,
1467 __s32 value)
1468 {
1469 int code;
1470 int hi_res, lo_res;
1471
1472 if (value == 0)
1473 return;
1474
1475 if (usage->code == REL_WHEEL_HI_RES)
1476 code = REL_WHEEL;
1477 else
1478 code = REL_HWHEEL;
1479
1480 /*
1481 * Windows reports one wheel click as value 120. Where a high-res
1482 * scroll wheel is present, a fraction of 120 is reported instead.
1483 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1484 * adhere to the 120 expectation.
1485 */
1486 hi_res = value * 120/usage->resolution_multiplier;
1487
1488 usage->wheel_accumulated += hi_res;
1489 lo_res = usage->wheel_accumulated/120;
1490 if (lo_res)
1491 usage->wheel_accumulated -= lo_res * 120;
1492
1493 input_event(input, EV_REL, code, lo_res);
1494 input_event(input, EV_REL, usage->code, hi_res);
1495 }
1496
hid_report_release_tool(struct hid_report * report,struct input_dev * input,unsigned int tool)1497 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1498 unsigned int tool)
1499 {
1500 /* if the given tool is not currently reported, ignore */
1501 if (!test_bit(tool, input->key))
1502 return;
1503
1504 /*
1505 * if the given tool was previously set, release it,
1506 * release any TOUCH and send an EV_SYN
1507 */
1508 input_event(input, EV_KEY, BTN_TOUCH, 0);
1509 input_event(input, EV_KEY, tool, 0);
1510 input_event(input, EV_SYN, SYN_REPORT, 0);
1511
1512 report->tool = 0;
1513 }
1514
hid_report_set_tool(struct hid_report * report,struct input_dev * input,unsigned int new_tool)1515 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1516 unsigned int new_tool)
1517 {
1518 if (report->tool != new_tool)
1519 hid_report_release_tool(report, input, report->tool);
1520
1521 input_event(input, EV_KEY, new_tool, 1);
1522 report->tool = new_tool;
1523 }
1524
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1525 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1526 {
1527 struct input_dev *input;
1528 struct hid_report *report = field->report;
1529 unsigned *quirks = &hid->quirks;
1530
1531 if (!usage->type)
1532 return;
1533
1534 if (usage->type == EV_PWR) {
1535 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1536
1537 if (!handled)
1538 hidinput_update_battery(hid, value);
1539
1540 return;
1541 }
1542
1543 if (!field->hidinput)
1544 return;
1545
1546 input = field->hidinput->input;
1547
1548 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1549 int hat_dir = usage->hat_dir;
1550 if (!hat_dir)
1551 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1552 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1553 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1554 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1555 return;
1556 }
1557
1558 /*
1559 * Ignore out-of-range values as per HID specification,
1560 * section 5.10 and 6.2.25, when NULL state bit is present.
1561 * When it's not, clamp the value to match Microsoft's input
1562 * driver as mentioned in "Required HID usages for digitizers":
1563 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1564 *
1565 * The logical_minimum < logical_maximum check is done so that we
1566 * don't unintentionally discard values sent by devices which
1567 * don't specify logical min and max.
1568 */
1569 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1570 field->logical_minimum < field->logical_maximum) {
1571 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1572 (value < field->logical_minimum ||
1573 value > field->logical_maximum)) {
1574 dbg_hid("Ignoring out-of-range value %x\n", value);
1575 return;
1576 }
1577 value = clamp(value,
1578 field->logical_minimum,
1579 field->logical_maximum);
1580 }
1581
1582 switch (usage->hid) {
1583 case HID_DG_ERASER:
1584 report->tool_active |= !!value;
1585
1586 /*
1587 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1588 * to accommodate for devices not following the spec.
1589 */
1590 if (value)
1591 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1592 else if (report->tool != BTN_TOOL_RUBBER)
1593 /* value is off, tool is not rubber, ignore */
1594 return;
1595 else if (*quirks & HID_QUIRK_NOINVERT &&
1596 !test_bit(BTN_TOUCH, input->key)) {
1597 /*
1598 * There is no invert to release the tool, let hid_input
1599 * send BTN_TOUCH with scancode and release the tool after.
1600 */
1601 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1602 return;
1603 }
1604
1605 /* let hid-input set BTN_TOUCH */
1606 break;
1607
1608 case HID_DG_INVERT:
1609 report->tool_active |= !!value;
1610
1611 /*
1612 * If invert is set, we store BTN_TOOL_RUBBER.
1613 */
1614 if (value)
1615 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1616 else if (!report->tool_active)
1617 /* tool_active not set means Invert and Eraser are not set */
1618 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1619
1620 /* no further processing */
1621 return;
1622
1623 case HID_DG_INRANGE:
1624 report->tool_active |= !!value;
1625
1626 if (report->tool_active) {
1627 /*
1628 * if tool is not set but is marked as active,
1629 * assume ours
1630 */
1631 if (!report->tool)
1632 report->tool = usage->code;
1633
1634 /* drivers may have changed the value behind our back, resend it */
1635 hid_report_set_tool(report, input, report->tool);
1636 } else {
1637 hid_report_release_tool(report, input, usage->code);
1638 }
1639
1640 /* reset tool_active for the next event */
1641 report->tool_active = false;
1642
1643 /* no further processing */
1644 return;
1645
1646 case HID_DG_TIPSWITCH:
1647 report->tool_active |= !!value;
1648
1649 /* if tool is set to RUBBER we should ignore the current value */
1650 if (report->tool == BTN_TOOL_RUBBER)
1651 return;
1652
1653 break;
1654
1655 case HID_DG_TIPPRESSURE:
1656 if (*quirks & HID_QUIRK_NOTOUCH) {
1657 int a = field->logical_minimum;
1658 int b = field->logical_maximum;
1659
1660 if (value > a + ((b - a) >> 3)) {
1661 input_event(input, EV_KEY, BTN_TOUCH, 1);
1662 report->tool_active = true;
1663 }
1664 }
1665 break;
1666
1667 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1668 dbg_hid("Maximum Effects - %d\n",value);
1669 return;
1670
1671 case HID_UP_PID | 0x7fUL:
1672 dbg_hid("PID Pool Report\n");
1673 return;
1674 }
1675
1676 switch (usage->type) {
1677 case EV_KEY:
1678 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1679 return;
1680 break;
1681
1682 case EV_REL:
1683 if (usage->code == REL_WHEEL_HI_RES ||
1684 usage->code == REL_HWHEEL_HI_RES) {
1685 hidinput_handle_scroll(usage, input, value);
1686 return;
1687 }
1688 break;
1689
1690 case EV_ABS:
1691 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1692 usage->code == ABS_VOLUME) {
1693 int count = abs(value);
1694 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1695 int i;
1696
1697 for (i = 0; i < count; i++) {
1698 input_event(input, EV_KEY, direction, 1);
1699 input_sync(input);
1700 input_event(input, EV_KEY, direction, 0);
1701 input_sync(input);
1702 }
1703 return;
1704
1705 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1706 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1707 value = field->logical_maximum - value;
1708 break;
1709 }
1710
1711 /*
1712 * Ignore reports for absolute data if the data didn't change. This is
1713 * not only an optimization but also fixes 'dead' key reports. Some
1714 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1715 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1716 * can only have one of them physically available. The 'dead' keys
1717 * report constant 0. As all map to the same keycode, they'd confuse
1718 * the input layer. If we filter the 'dead' keys on the HID level, we
1719 * skip the keycode translation and only forward real events.
1720 */
1721 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1722 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1723 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1724 usage->usage_index < field->maxusage &&
1725 value == field->value[usage->usage_index])
1726 return;
1727
1728 /* report the usage code as scancode if the key status has changed */
1729 if (usage->type == EV_KEY &&
1730 (!test_bit(usage->code, input->key)) == value)
1731 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1732
1733 input_event(input, usage->type, usage->code, value);
1734
1735 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1736 usage->type == EV_KEY && value) {
1737 input_sync(input);
1738 input_event(input, usage->type, usage->code, 0);
1739 }
1740 }
1741
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1742 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1743 {
1744 struct hid_input *hidinput;
1745
1746 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1747 return;
1748
1749 list_for_each_entry(hidinput, &hid->inputs, list)
1750 input_sync(hidinput->input);
1751 }
1752 EXPORT_SYMBOL_GPL(hidinput_report_event);
1753
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1754 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1755 unsigned int code, struct hid_field **field)
1756 {
1757 struct hid_report *report;
1758 int i, j;
1759
1760 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1761 for (i = 0; i < report->maxfield; i++) {
1762 *field = report->field[i];
1763 for (j = 0; j < (*field)->maxusage; j++)
1764 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1765 return j;
1766 }
1767 }
1768 return -1;
1769 }
1770
hidinput_get_led_field(struct hid_device * hid)1771 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1772 {
1773 struct hid_report *report;
1774 struct hid_field *field;
1775 int i, j;
1776
1777 list_for_each_entry(report,
1778 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1779 list) {
1780 for (i = 0; i < report->maxfield; i++) {
1781 field = report->field[i];
1782 for (j = 0; j < field->maxusage; j++)
1783 if (field->usage[j].type == EV_LED)
1784 return field;
1785 }
1786 }
1787 return NULL;
1788 }
1789 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1790
hidinput_count_leds(struct hid_device * hid)1791 unsigned int hidinput_count_leds(struct hid_device *hid)
1792 {
1793 struct hid_report *report;
1794 struct hid_field *field;
1795 int i, j;
1796 unsigned int count = 0;
1797
1798 list_for_each_entry(report,
1799 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1800 list) {
1801 for (i = 0; i < report->maxfield; i++) {
1802 field = report->field[i];
1803 for (j = 0; j < field->maxusage; j++)
1804 if (field->usage[j].type == EV_LED &&
1805 field->value[j])
1806 count += 1;
1807 }
1808 }
1809 return count;
1810 }
1811 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1812
hidinput_led_worker(struct work_struct * work)1813 static void hidinput_led_worker(struct work_struct *work)
1814 {
1815 struct hid_device *hid = container_of(work, struct hid_device,
1816 led_work);
1817 struct hid_field *field;
1818 struct hid_report *report;
1819 int ret;
1820 u32 len;
1821 __u8 *buf;
1822
1823 field = hidinput_get_led_field(hid);
1824 if (!field)
1825 return;
1826
1827 /*
1828 * field->report is accessed unlocked regarding HID core. So there might
1829 * be another incoming SET-LED request from user-space, which changes
1830 * the LED state while we assemble our outgoing buffer. However, this
1831 * doesn't matter as hid_output_report() correctly converts it into a
1832 * boolean value no matter what information is currently set on the LED
1833 * field (even garbage). So the remote device will always get a valid
1834 * request.
1835 * And in case we send a wrong value, a next led worker is spawned
1836 * for every SET-LED request so the following worker will send the
1837 * correct value, guaranteed!
1838 */
1839
1840 report = field->report;
1841
1842 /* use custom SET_REPORT request if possible (asynchronous) */
1843 if (hid->ll_driver->request)
1844 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1845
1846 /* fall back to generic raw-output-report */
1847 len = hid_report_len(report);
1848 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1849 if (!buf)
1850 return;
1851
1852 hid_output_report(report, buf);
1853 /* synchronous output report */
1854 ret = hid_hw_output_report(hid, buf, len);
1855 if (ret == -ENOSYS)
1856 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1857 HID_REQ_SET_REPORT);
1858 kfree(buf);
1859 }
1860
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1861 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1862 unsigned int code, int value)
1863 {
1864 struct hid_device *hid = input_get_drvdata(dev);
1865 struct hid_field *field;
1866 int offset;
1867
1868 if (type == EV_FF)
1869 return input_ff_event(dev, type, code, value);
1870
1871 if (type != EV_LED)
1872 return -1;
1873
1874 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1875 hid_warn(dev, "event field not found\n");
1876 return -1;
1877 }
1878
1879 hid_set_field(field, offset, value);
1880
1881 schedule_work(&hid->led_work);
1882 return 0;
1883 }
1884
hidinput_open(struct input_dev * dev)1885 static int hidinput_open(struct input_dev *dev)
1886 {
1887 struct hid_device *hid = input_get_drvdata(dev);
1888
1889 return hid_hw_open(hid);
1890 }
1891
hidinput_close(struct input_dev * dev)1892 static void hidinput_close(struct input_dev *dev)
1893 {
1894 struct hid_device *hid = input_get_drvdata(dev);
1895
1896 hid_hw_close(hid);
1897 }
1898
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1899 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1900 struct hid_report *report, bool use_logical_max)
1901 {
1902 struct hid_usage *usage;
1903 bool update_needed = false;
1904 bool get_report_completed = false;
1905 int i, j;
1906
1907 if (report->maxfield == 0)
1908 return false;
1909
1910 for (i = 0; i < report->maxfield; i++) {
1911 __s32 value = use_logical_max ?
1912 report->field[i]->logical_maximum :
1913 report->field[i]->logical_minimum;
1914
1915 /* There is no good reason for a Resolution
1916 * Multiplier to have a count other than 1.
1917 * Ignore that case.
1918 */
1919 if (report->field[i]->report_count != 1)
1920 continue;
1921
1922 for (j = 0; j < report->field[i]->maxusage; j++) {
1923 usage = &report->field[i]->usage[j];
1924
1925 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1926 continue;
1927
1928 /*
1929 * If we have more than one feature within this
1930 * report we need to fill in the bits from the
1931 * others before we can overwrite the ones for the
1932 * Resolution Multiplier.
1933 *
1934 * But if we're not allowed to read from the device,
1935 * we just bail. Such a device should not exist
1936 * anyway.
1937 */
1938 if (!get_report_completed && report->maxfield > 1) {
1939 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1940 return update_needed;
1941
1942 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1943 hid_hw_wait(hid);
1944 get_report_completed = true;
1945 }
1946
1947 report->field[i]->value[j] = value;
1948 update_needed = true;
1949 }
1950 }
1951
1952 return update_needed;
1953 }
1954
hidinput_change_resolution_multipliers(struct hid_device * hid)1955 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1956 {
1957 struct hid_report_enum *rep_enum;
1958 struct hid_report *rep;
1959 int ret;
1960
1961 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1962 list_for_each_entry(rep, &rep_enum->report_list, list) {
1963 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1964 rep, true);
1965
1966 if (update_needed) {
1967 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1968 if (ret) {
1969 __hidinput_change_resolution_multipliers(hid,
1970 rep, false);
1971 return;
1972 }
1973 }
1974 }
1975
1976 /* refresh our structs */
1977 hid_setup_resolution_multiplier(hid);
1978 }
1979
report_features(struct hid_device * hid)1980 static void report_features(struct hid_device *hid)
1981 {
1982 struct hid_driver *drv = hid->driver;
1983 struct hid_report_enum *rep_enum;
1984 struct hid_report *rep;
1985 struct hid_usage *usage;
1986 int i, j;
1987
1988 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1989 list_for_each_entry(rep, &rep_enum->report_list, list)
1990 for (i = 0; i < rep->maxfield; i++) {
1991 /* Ignore if report count is out of bounds. */
1992 if (rep->field[i]->report_count < 1)
1993 continue;
1994
1995 for (j = 0; j < rep->field[i]->maxusage; j++) {
1996 usage = &rep->field[i]->usage[j];
1997
1998 /* Verify if Battery Strength feature is available */
1999 if (usage->hid == HID_DC_BATTERYSTRENGTH)
2000 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2001 rep->field[i], false);
2002
2003 if (drv->feature_mapping)
2004 drv->feature_mapping(hid, rep->field[i], usage);
2005 }
2006 }
2007 }
2008
hidinput_allocate(struct hid_device * hid,unsigned int application)2009 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2010 unsigned int application)
2011 {
2012 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2013 struct input_dev *input_dev = input_allocate_device();
2014 const char *suffix = NULL;
2015 size_t suffix_len, name_len;
2016
2017 if (!hidinput || !input_dev)
2018 goto fail;
2019
2020 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2021 hid->maxapplication > 1) {
2022 switch (application) {
2023 case HID_GD_KEYBOARD:
2024 suffix = "Keyboard";
2025 break;
2026 case HID_GD_KEYPAD:
2027 suffix = "Keypad";
2028 break;
2029 case HID_GD_MOUSE:
2030 suffix = "Mouse";
2031 break;
2032 case HID_DG_PEN:
2033 /*
2034 * yes, there is an issue here:
2035 * DG_PEN -> "Stylus"
2036 * DG_STYLUS -> "Pen"
2037 * But changing this now means users with config snippets
2038 * will have to change it and the test suite will not be happy.
2039 */
2040 suffix = "Stylus";
2041 break;
2042 case HID_DG_STYLUS:
2043 suffix = "Pen";
2044 break;
2045 case HID_DG_TOUCHSCREEN:
2046 suffix = "Touchscreen";
2047 break;
2048 case HID_DG_TOUCHPAD:
2049 suffix = "Touchpad";
2050 break;
2051 case HID_GD_SYSTEM_CONTROL:
2052 suffix = "System Control";
2053 break;
2054 case HID_CP_CONSUMER_CONTROL:
2055 suffix = "Consumer Control";
2056 break;
2057 case HID_GD_WIRELESS_RADIO_CTLS:
2058 suffix = "Wireless Radio Control";
2059 break;
2060 case HID_GD_SYSTEM_MULTIAXIS:
2061 suffix = "System Multi Axis";
2062 break;
2063 default:
2064 break;
2065 }
2066 }
2067
2068 if (suffix) {
2069 name_len = strlen(hid->name);
2070 suffix_len = strlen(suffix);
2071 if ((name_len < suffix_len) ||
2072 strcmp(hid->name + name_len - suffix_len, suffix)) {
2073 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2074 hid->name, suffix);
2075 if (!hidinput->name)
2076 goto fail;
2077 }
2078 }
2079
2080 input_set_drvdata(input_dev, hid);
2081 input_dev->event = hidinput_input_event;
2082 input_dev->open = hidinput_open;
2083 input_dev->close = hidinput_close;
2084 input_dev->setkeycode = hidinput_setkeycode;
2085 input_dev->getkeycode = hidinput_getkeycode;
2086
2087 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2088 input_dev->phys = hid->phys;
2089 input_dev->uniq = hid->uniq;
2090 input_dev->id.bustype = hid->bus;
2091 input_dev->id.vendor = hid->vendor;
2092 input_dev->id.product = hid->product;
2093 input_dev->id.version = hid->version;
2094 input_dev->dev.parent = &hid->dev;
2095
2096 hidinput->input = input_dev;
2097 hidinput->application = application;
2098 list_add_tail(&hidinput->list, &hid->inputs);
2099
2100 INIT_LIST_HEAD(&hidinput->reports);
2101
2102 return hidinput;
2103
2104 fail:
2105 kfree(hidinput);
2106 input_free_device(input_dev);
2107 hid_err(hid, "Out of memory during hid input probe\n");
2108 return NULL;
2109 }
2110
hidinput_has_been_populated(struct hid_input * hidinput)2111 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2112 {
2113 int i;
2114 unsigned long r = 0;
2115
2116 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2117 r |= hidinput->input->evbit[i];
2118
2119 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2120 r |= hidinput->input->keybit[i];
2121
2122 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2123 r |= hidinput->input->relbit[i];
2124
2125 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2126 r |= hidinput->input->absbit[i];
2127
2128 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2129 r |= hidinput->input->mscbit[i];
2130
2131 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2132 r |= hidinput->input->ledbit[i];
2133
2134 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2135 r |= hidinput->input->sndbit[i];
2136
2137 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2138 r |= hidinput->input->ffbit[i];
2139
2140 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2141 r |= hidinput->input->swbit[i];
2142
2143 return !!r;
2144 }
2145
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)2146 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2147 struct hid_input *hidinput)
2148 {
2149 struct hid_report *report;
2150 int i, k;
2151
2152 list_del(&hidinput->list);
2153 input_free_device(hidinput->input);
2154 kfree(hidinput->name);
2155
2156 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2157 if (k == HID_OUTPUT_REPORT &&
2158 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2159 continue;
2160
2161 list_for_each_entry(report, &hid->report_enum[k].report_list,
2162 list) {
2163
2164 for (i = 0; i < report->maxfield; i++)
2165 if (report->field[i]->hidinput == hidinput)
2166 report->field[i]->hidinput = NULL;
2167 }
2168 }
2169
2170 kfree(hidinput);
2171 }
2172
hidinput_match(struct hid_report * report)2173 static struct hid_input *hidinput_match(struct hid_report *report)
2174 {
2175 struct hid_device *hid = report->device;
2176 struct hid_input *hidinput;
2177
2178 list_for_each_entry(hidinput, &hid->inputs, list) {
2179 if (hidinput->report &&
2180 hidinput->report->id == report->id)
2181 return hidinput;
2182 }
2183
2184 return NULL;
2185 }
2186
hidinput_match_application(struct hid_report * report)2187 static struct hid_input *hidinput_match_application(struct hid_report *report)
2188 {
2189 struct hid_device *hid = report->device;
2190 struct hid_input *hidinput;
2191
2192 list_for_each_entry(hidinput, &hid->inputs, list) {
2193 if (hidinput->application == report->application)
2194 return hidinput;
2195
2196 /*
2197 * Keep SystemControl and ConsumerControl applications together
2198 * with the main keyboard, if present.
2199 */
2200 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2201 report->application == HID_CP_CONSUMER_CONTROL) &&
2202 hidinput->application == HID_GD_KEYBOARD) {
2203 return hidinput;
2204 }
2205 }
2206
2207 return NULL;
2208 }
2209
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)2210 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2211 struct hid_report *report)
2212 {
2213 int i, j, k;
2214 int first_field_index = 0;
2215 int slot_collection_index = -1;
2216 int prev_collection_index = -1;
2217 unsigned int slot_idx = 0;
2218 struct hid_field *field;
2219
2220 /*
2221 * First tag all the fields that are part of a slot,
2222 * a slot needs to have one Contact ID in the collection
2223 */
2224 for (i = 0; i < report->maxfield; i++) {
2225 field = report->field[i];
2226
2227 /* ignore fields without usage */
2228 if (field->maxusage < 1)
2229 continue;
2230
2231 /*
2232 * janitoring when collection_index changes
2233 */
2234 if (prev_collection_index != field->usage->collection_index) {
2235 prev_collection_index = field->usage->collection_index;
2236 first_field_index = i;
2237 }
2238
2239 /*
2240 * if we already found a Contact ID in the collection,
2241 * tag and continue to the next.
2242 */
2243 if (slot_collection_index == field->usage->collection_index) {
2244 field->slot_idx = slot_idx;
2245 continue;
2246 }
2247
2248 /* check if the current field has Contact ID */
2249 for (j = 0; j < field->maxusage; j++) {
2250 if (field->usage[j].hid == HID_DG_CONTACTID) {
2251 slot_collection_index = field->usage->collection_index;
2252 slot_idx++;
2253
2254 /*
2255 * mark all previous fields and this one in the
2256 * current collection to be slotted.
2257 */
2258 for (k = first_field_index; k <= i; k++)
2259 report->field[k]->slot_idx = slot_idx;
2260 break;
2261 }
2262 }
2263 }
2264
2265 for (i = 0; i < report->maxfield; i++)
2266 for (j = 0; j < report->field[i]->maxusage; j++)
2267 hidinput_configure_usage(hidinput, report->field[i],
2268 report->field[i]->usage + j,
2269 j);
2270 }
2271
2272 /*
2273 * Register the input device; print a message.
2274 * Configure the input layer interface
2275 * Read all reports and initialize the absolute field values.
2276 */
2277
hidinput_connect(struct hid_device * hid,unsigned int force)2278 int hidinput_connect(struct hid_device *hid, unsigned int force)
2279 {
2280 struct hid_driver *drv = hid->driver;
2281 struct hid_report *report;
2282 struct hid_input *next, *hidinput = NULL;
2283 unsigned int application;
2284 int i, k;
2285
2286 INIT_LIST_HEAD(&hid->inputs);
2287 INIT_WORK(&hid->led_work, hidinput_led_worker);
2288
2289 hid->status &= ~HID_STAT_DUP_DETECTED;
2290
2291 if (!force) {
2292 for (i = 0; i < hid->maxcollection; i++) {
2293 struct hid_collection *col = &hid->collection[i];
2294 if (col->type == HID_COLLECTION_APPLICATION ||
2295 col->type == HID_COLLECTION_PHYSICAL)
2296 if (IS_INPUT_APPLICATION(col->usage))
2297 break;
2298 }
2299
2300 if (i == hid->maxcollection)
2301 return -1;
2302 }
2303
2304 report_features(hid);
2305
2306 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2307 if (k == HID_OUTPUT_REPORT &&
2308 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2309 continue;
2310
2311 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2312
2313 if (!report->maxfield)
2314 continue;
2315
2316 application = report->application;
2317
2318 /*
2319 * Find the previous hidinput report attached
2320 * to this report id.
2321 */
2322 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2323 hidinput = hidinput_match(report);
2324 else if (hid->maxapplication > 1 &&
2325 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2326 hidinput = hidinput_match_application(report);
2327
2328 if (!hidinput) {
2329 hidinput = hidinput_allocate(hid, application);
2330 if (!hidinput)
2331 goto out_unwind;
2332 }
2333
2334 hidinput_configure_usages(hidinput, report);
2335
2336 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2337 hidinput->report = report;
2338
2339 list_add_tail(&report->hidinput_list,
2340 &hidinput->reports);
2341 }
2342 }
2343
2344 hidinput_change_resolution_multipliers(hid);
2345
2346 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2347 if (drv->input_configured &&
2348 drv->input_configured(hid, hidinput))
2349 goto out_unwind;
2350
2351 if (!hidinput_has_been_populated(hidinput)) {
2352 /* no need to register an input device not populated */
2353 hidinput_cleanup_hidinput(hid, hidinput);
2354 continue;
2355 }
2356
2357 if (input_register_device(hidinput->input))
2358 goto out_unwind;
2359 hidinput->registered = true;
2360 }
2361
2362 if (list_empty(&hid->inputs)) {
2363 hid_err(hid, "No inputs registered, leaving\n");
2364 goto out_unwind;
2365 }
2366
2367 if (hid->status & HID_STAT_DUP_DETECTED)
2368 hid_dbg(hid,
2369 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2370
2371 return 0;
2372
2373 out_unwind:
2374 /* unwind the ones we already registered */
2375 hidinput_disconnect(hid);
2376
2377 return -1;
2378 }
2379 EXPORT_SYMBOL_GPL(hidinput_connect);
2380
hidinput_disconnect(struct hid_device * hid)2381 void hidinput_disconnect(struct hid_device *hid)
2382 {
2383 struct hid_input *hidinput, *next;
2384
2385 hidinput_cleanup_battery(hid);
2386
2387 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2388 list_del(&hidinput->list);
2389 if (hidinput->registered)
2390 input_unregister_device(hidinput->input);
2391 else
2392 input_free_device(hidinput->input);
2393 kfree(hidinput->name);
2394 kfree(hidinput);
2395 }
2396
2397 /* led_work is spawned by input_dev callbacks, but doesn't access the
2398 * parent input_dev at all. Once all input devices are removed, we
2399 * know that led_work will never get restarted, so we can cancel it
2400 * synchronously and are safe. */
2401 cancel_work_sync(&hid->led_work);
2402 }
2403 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2404
2405 #ifdef CONFIG_HID_KUNIT_TEST
2406 #include "hid-input-test.c"
2407 #endif
2408