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_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_UX3402_TOUCHSCREEN),
381 HID_BATTERY_QUIRK_IGNORE },
382 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_UX6404_TOUCHSCREEN),
383 HID_BATTERY_QUIRK_IGNORE },
384 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
385 HID_BATTERY_QUIRK_IGNORE },
386 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
387 HID_BATTERY_QUIRK_IGNORE },
388 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
389 HID_BATTERY_QUIRK_AVOID_QUERY },
390 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
391 HID_BATTERY_QUIRK_AVOID_QUERY },
392 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
393 HID_BATTERY_QUIRK_AVOID_QUERY },
394 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
395 HID_BATTERY_QUIRK_IGNORE },
396 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
397 HID_BATTERY_QUIRK_IGNORE },
398 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
399 HID_BATTERY_QUIRK_IGNORE },
400 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
401 HID_BATTERY_QUIRK_IGNORE },
402 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
403 HID_BATTERY_QUIRK_IGNORE },
404 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
405 HID_BATTERY_QUIRK_IGNORE },
406 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
407 HID_BATTERY_QUIRK_IGNORE },
408 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
409 HID_BATTERY_QUIRK_IGNORE },
410 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13T_AW100),
411 HID_BATTERY_QUIRK_IGNORE },
412 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V1),
413 HID_BATTERY_QUIRK_IGNORE },
414 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V2),
415 HID_BATTERY_QUIRK_IGNORE },
416 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15_EU0556NG),
417 HID_BATTERY_QUIRK_IGNORE },
418 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
419 HID_BATTERY_QUIRK_AVOID_QUERY },
420 {}
421 };
422
find_battery_quirk(struct hid_device * hdev)423 static unsigned find_battery_quirk(struct hid_device *hdev)
424 {
425 unsigned quirks = 0;
426 const struct hid_device_id *match;
427
428 match = hid_match_id(hdev, hid_battery_quirks);
429 if (match != NULL)
430 quirks = match->driver_data;
431
432 return quirks;
433 }
434
hidinput_scale_battery_capacity(struct hid_device * dev,int value)435 static int hidinput_scale_battery_capacity(struct hid_device *dev,
436 int value)
437 {
438 if (dev->battery_min < dev->battery_max &&
439 value >= dev->battery_min && value <= dev->battery_max)
440 value = ((value - dev->battery_min) * 100) /
441 (dev->battery_max - dev->battery_min);
442
443 return value;
444 }
445
hidinput_query_battery_capacity(struct hid_device * dev)446 static int hidinput_query_battery_capacity(struct hid_device *dev)
447 {
448 u8 *buf;
449 int ret;
450
451 buf = kmalloc(4, GFP_KERNEL);
452 if (!buf)
453 return -ENOMEM;
454
455 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
456 dev->battery_report_type, HID_REQ_GET_REPORT);
457 if (ret < 2) {
458 kfree(buf);
459 return -ENODATA;
460 }
461
462 ret = hidinput_scale_battery_capacity(dev, buf[1]);
463 kfree(buf);
464 return ret;
465 }
466
hidinput_get_battery_property(struct power_supply * psy,enum power_supply_property prop,union power_supply_propval * val)467 static int hidinput_get_battery_property(struct power_supply *psy,
468 enum power_supply_property prop,
469 union power_supply_propval *val)
470 {
471 struct hid_device *dev = power_supply_get_drvdata(psy);
472 int value;
473 int ret = 0;
474
475 switch (prop) {
476 case POWER_SUPPLY_PROP_PRESENT:
477 case POWER_SUPPLY_PROP_ONLINE:
478 val->intval = 1;
479 break;
480
481 case POWER_SUPPLY_PROP_CAPACITY:
482 if (dev->battery_status != HID_BATTERY_REPORTED &&
483 !dev->battery_avoid_query) {
484 value = hidinput_query_battery_capacity(dev);
485 if (value < 0)
486 return value;
487 } else {
488 value = dev->battery_capacity;
489 }
490
491 val->intval = value;
492 break;
493
494 case POWER_SUPPLY_PROP_MODEL_NAME:
495 val->strval = dev->name;
496 break;
497
498 case POWER_SUPPLY_PROP_STATUS:
499 if (dev->battery_status != HID_BATTERY_REPORTED &&
500 !dev->battery_avoid_query) {
501 value = hidinput_query_battery_capacity(dev);
502 if (value < 0)
503 return value;
504
505 dev->battery_capacity = value;
506 dev->battery_status = HID_BATTERY_QUERIED;
507 }
508
509 if (dev->battery_status == HID_BATTERY_UNKNOWN)
510 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
511 else
512 val->intval = dev->battery_charge_status;
513 break;
514
515 case POWER_SUPPLY_PROP_SCOPE:
516 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
517 break;
518
519 default:
520 ret = -EINVAL;
521 break;
522 }
523
524 return ret;
525 }
526
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)527 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
528 struct hid_field *field, bool is_percentage)
529 {
530 struct power_supply_desc *psy_desc;
531 struct power_supply_config psy_cfg = { .drv_data = dev, };
532 unsigned quirks;
533 s32 min, max;
534 int error;
535
536 if (dev->battery)
537 return 0; /* already initialized? */
538
539 quirks = find_battery_quirk(dev);
540
541 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
542 dev->bus, dev->vendor, dev->product, dev->version, quirks);
543
544 if (quirks & HID_BATTERY_QUIRK_IGNORE)
545 return 0;
546
547 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
548 if (!psy_desc)
549 return -ENOMEM;
550
551 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
552 strlen(dev->uniq) ?
553 dev->uniq : dev_name(&dev->dev));
554 if (!psy_desc->name) {
555 error = -ENOMEM;
556 goto err_free_mem;
557 }
558
559 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
560 psy_desc->properties = hidinput_battery_props;
561 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
562 psy_desc->use_for_apm = 0;
563 psy_desc->get_property = hidinput_get_battery_property;
564
565 min = field->logical_minimum;
566 max = field->logical_maximum;
567
568 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
569 min = 0;
570 max = 100;
571 }
572
573 if (quirks & HID_BATTERY_QUIRK_FEATURE)
574 report_type = HID_FEATURE_REPORT;
575
576 dev->battery_min = min;
577 dev->battery_max = max;
578 dev->battery_report_type = report_type;
579 dev->battery_report_id = field->report->id;
580 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
581
582 /*
583 * Stylus is normally not connected to the device and thus we
584 * can't query the device and get meaningful battery strength.
585 * We have to wait for the device to report it on its own.
586 */
587 dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
588 field->physical == HID_DG_STYLUS;
589
590 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
591 dev->battery_avoid_query = true;
592
593 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
594 if (IS_ERR(dev->battery)) {
595 error = PTR_ERR(dev->battery);
596 hid_warn(dev, "can't register power supply: %d\n", error);
597 goto err_free_name;
598 }
599
600 power_supply_powers(dev->battery, &dev->dev);
601 return 0;
602
603 err_free_name:
604 kfree(psy_desc->name);
605 err_free_mem:
606 kfree(psy_desc);
607 dev->battery = NULL;
608 return error;
609 }
610
hidinput_cleanup_battery(struct hid_device * dev)611 static void hidinput_cleanup_battery(struct hid_device *dev)
612 {
613 const struct power_supply_desc *psy_desc;
614
615 if (!dev->battery)
616 return;
617
618 psy_desc = dev->battery->desc;
619 power_supply_unregister(dev->battery);
620 kfree(psy_desc->name);
621 kfree(psy_desc);
622 dev->battery = NULL;
623 }
624
hidinput_update_battery(struct hid_device * dev,int value)625 static void hidinput_update_battery(struct hid_device *dev, int value)
626 {
627 int capacity;
628
629 if (!dev->battery)
630 return;
631
632 if (value == 0 || value < dev->battery_min || value > dev->battery_max)
633 return;
634
635 capacity = hidinput_scale_battery_capacity(dev, value);
636
637 if (dev->battery_status != HID_BATTERY_REPORTED ||
638 capacity != dev->battery_capacity ||
639 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
640 dev->battery_capacity = capacity;
641 dev->battery_status = HID_BATTERY_REPORTED;
642 dev->battery_ratelimit_time =
643 ktime_add_ms(ktime_get_coarse(), 30 * 1000);
644 power_supply_changed(dev->battery);
645 }
646 }
647
hidinput_set_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)648 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
649 unsigned int usage, int value)
650 {
651 switch (usage) {
652 case HID_BAT_CHARGING:
653 dev->battery_charge_status = value ?
654 POWER_SUPPLY_STATUS_CHARGING :
655 POWER_SUPPLY_STATUS_DISCHARGING;
656 return true;
657 }
658
659 return false;
660 }
661 #else /* !CONFIG_HID_BATTERY_STRENGTH */
hidinput_setup_battery(struct hid_device * dev,unsigned report_type,struct hid_field * field,bool is_percentage)662 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
663 struct hid_field *field, bool is_percentage)
664 {
665 return 0;
666 }
667
hidinput_cleanup_battery(struct hid_device * dev)668 static void hidinput_cleanup_battery(struct hid_device *dev)
669 {
670 }
671
hidinput_update_battery(struct hid_device * dev,int value)672 static void hidinput_update_battery(struct hid_device *dev, int value)
673 {
674 }
675
hidinput_set_battery_charge_status(struct hid_device * dev,unsigned int usage,int value)676 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
677 unsigned int usage, int value)
678 {
679 return false;
680 }
681 #endif /* CONFIG_HID_BATTERY_STRENGTH */
682
hidinput_field_in_collection(struct hid_device * device,struct hid_field * field,unsigned int type,unsigned int usage)683 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
684 unsigned int type, unsigned int usage)
685 {
686 struct hid_collection *collection;
687
688 collection = &device->collection[field->usage->collection_index];
689
690 return collection->type == type && collection->usage == usage;
691 }
692
hidinput_configure_usage(struct hid_input * hidinput,struct hid_field * field,struct hid_usage * usage,unsigned int usage_index)693 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
694 struct hid_usage *usage, unsigned int usage_index)
695 {
696 struct input_dev *input = hidinput->input;
697 struct hid_device *device = input_get_drvdata(input);
698 const struct usage_priority *usage_priority = NULL;
699 int max = 0, code;
700 unsigned int i = 0;
701 unsigned long *bit = NULL;
702
703 field->hidinput = hidinput;
704
705 if (field->flags & HID_MAIN_ITEM_CONSTANT)
706 goto ignore;
707
708 /* Ignore if report count is out of bounds. */
709 if (field->report_count < 1)
710 goto ignore;
711
712 /* only LED usages are supported in output fields */
713 if (field->report_type == HID_OUTPUT_REPORT &&
714 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
715 goto ignore;
716 }
717
718 /* assign a priority based on the static list declared here */
719 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
720 if (usage->hid == hidinput_usages_priorities[i].usage) {
721 usage_priority = &hidinput_usages_priorities[i];
722
723 field->usages_priorities[usage_index] =
724 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
725 break;
726 }
727 }
728
729 /*
730 * For slotted devices, we need to also add the slot index
731 * in the priority.
732 */
733 if (usage_priority && usage_priority->global)
734 field->usages_priorities[usage_index] |=
735 usage_priority->slot_overwrite;
736 else
737 field->usages_priorities[usage_index] |=
738 (0xff - field->slot_idx) << 16;
739
740 if (device->driver->input_mapping) {
741 int ret = device->driver->input_mapping(device, hidinput, field,
742 usage, &bit, &max);
743 if (ret > 0)
744 goto mapped;
745 if (ret < 0)
746 goto ignore;
747 }
748
749 switch (usage->hid & HID_USAGE_PAGE) {
750 case HID_UP_UNDEFINED:
751 goto ignore;
752
753 case HID_UP_KEYBOARD:
754 set_bit(EV_REP, input->evbit);
755
756 if ((usage->hid & HID_USAGE) < 256) {
757 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
758 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
759 } else
760 map_key(KEY_UNKNOWN);
761
762 break;
763
764 case HID_UP_BUTTON:
765 code = ((usage->hid - 1) & HID_USAGE);
766
767 switch (field->application) {
768 case HID_GD_MOUSE:
769 case HID_GD_POINTER: code += BTN_MOUSE; break;
770 case HID_GD_JOYSTICK:
771 if (code <= 0xf)
772 code += BTN_JOYSTICK;
773 else
774 code += BTN_TRIGGER_HAPPY - 0x10;
775 break;
776 case HID_GD_GAMEPAD:
777 if (code <= 0xf)
778 code += BTN_GAMEPAD;
779 else
780 code += BTN_TRIGGER_HAPPY - 0x10;
781 break;
782 case HID_CP_CONSUMER_CONTROL:
783 if (hidinput_field_in_collection(device, field,
784 HID_COLLECTION_NAMED_ARRAY,
785 HID_CP_PROGRAMMABLEBUTTONS)) {
786 if (code <= 0x1d)
787 code += KEY_MACRO1;
788 else
789 code += BTN_TRIGGER_HAPPY - 0x1e;
790 break;
791 }
792 fallthrough;
793 default:
794 switch (field->physical) {
795 case HID_GD_MOUSE:
796 case HID_GD_POINTER: code += BTN_MOUSE; break;
797 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
798 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
799 default: code += BTN_MISC;
800 }
801 }
802
803 map_key(code);
804 break;
805
806 case HID_UP_SIMULATION:
807 switch (usage->hid & 0xffff) {
808 case 0xba: map_abs(ABS_RUDDER); break;
809 case 0xbb: map_abs(ABS_THROTTLE); break;
810 case 0xc4: map_abs(ABS_GAS); break;
811 case 0xc5: map_abs(ABS_BRAKE); break;
812 case 0xc8: map_abs(ABS_WHEEL); break;
813 default: goto ignore;
814 }
815 break;
816
817 case HID_UP_GENDESK:
818 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
819 switch (usage->hid & 0xf) {
820 case 0x1: map_key_clear(KEY_POWER); break;
821 case 0x2: map_key_clear(KEY_SLEEP); break;
822 case 0x3: map_key_clear(KEY_WAKEUP); break;
823 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
824 case 0x5: map_key_clear(KEY_MENU); break;
825 case 0x6: map_key_clear(KEY_PROG1); break;
826 case 0x7: map_key_clear(KEY_HELP); break;
827 case 0x8: map_key_clear(KEY_EXIT); break;
828 case 0x9: map_key_clear(KEY_SELECT); break;
829 case 0xa: map_key_clear(KEY_RIGHT); break;
830 case 0xb: map_key_clear(KEY_LEFT); break;
831 case 0xc: map_key_clear(KEY_UP); break;
832 case 0xd: map_key_clear(KEY_DOWN); break;
833 case 0xe: map_key_clear(KEY_POWER2); break;
834 case 0xf: map_key_clear(KEY_RESTART); break;
835 default: goto unknown;
836 }
837 break;
838 }
839
840 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl*/
841 switch (usage->hid & 0xf) {
842 case 0xb: map_key_clear(KEY_DO_NOT_DISTURB); break;
843 default: goto ignore;
844 }
845 break;
846 }
847
848 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
849 switch (usage->hid & 0xf) {
850 case 0x9: map_key_clear(KEY_MICMUTE); break;
851 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
852 default: goto ignore;
853 }
854 break;
855 }
856
857 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
858 switch (usage->hid & 0xf) {
859 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
860 default: goto ignore;
861 }
862 break;
863 }
864
865 /*
866 * Some lazy vendors declare 255 usages for System Control,
867 * leading to the creation of ABS_X|Y axis and too many others.
868 * It wouldn't be a problem if joydev doesn't consider the
869 * device as a joystick then.
870 */
871 if (field->application == HID_GD_SYSTEM_CONTROL)
872 goto ignore;
873
874 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
875 switch (usage->hid) {
876 case HID_GD_UP: usage->hat_dir = 1; break;
877 case HID_GD_DOWN: usage->hat_dir = 5; break;
878 case HID_GD_RIGHT: usage->hat_dir = 3; break;
879 case HID_GD_LEFT: usage->hat_dir = 7; break;
880 default: goto unknown;
881 }
882 if (field->dpad) {
883 map_abs(field->dpad);
884 goto ignore;
885 }
886 map_abs(ABS_HAT0X);
887 break;
888 }
889
890 switch (usage->hid) {
891 /* These usage IDs map directly to the usage codes. */
892 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
893 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
894 if (field->flags & HID_MAIN_ITEM_RELATIVE)
895 map_rel(usage->hid & 0xf);
896 else
897 map_abs_clear(usage->hid & 0xf);
898 break;
899
900 case HID_GD_WHEEL:
901 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
902 set_bit(REL_WHEEL, input->relbit);
903 map_rel(REL_WHEEL_HI_RES);
904 } else {
905 map_abs(usage->hid & 0xf);
906 }
907 break;
908 case HID_GD_SLIDER: case HID_GD_DIAL:
909 if (field->flags & HID_MAIN_ITEM_RELATIVE)
910 map_rel(usage->hid & 0xf);
911 else
912 map_abs(usage->hid & 0xf);
913 break;
914
915 case HID_GD_HATSWITCH:
916 usage->hat_min = field->logical_minimum;
917 usage->hat_max = field->logical_maximum;
918 map_abs(ABS_HAT0X);
919 break;
920
921 case HID_GD_START: map_key_clear(BTN_START); break;
922 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
923
924 case HID_GD_RFKILL_BTN:
925 /* MS wireless radio ctl extension, also check CA */
926 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
927 map_key_clear(KEY_RFKILL);
928 /* We need to simulate the btn release */
929 field->flags |= HID_MAIN_ITEM_RELATIVE;
930 break;
931 }
932 goto unknown;
933
934 default: goto unknown;
935 }
936
937 break;
938
939 case HID_UP_LED:
940 switch (usage->hid & 0xffff) { /* HID-Value: */
941 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
942 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
943 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
944 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
945 case 0x05: map_led (LED_KANA); break; /* "Kana" */
946 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
947 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
948 case 0x09: map_led (LED_MUTE); break; /* "Mute" */
949 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
950 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
951 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
952
953 default: goto ignore;
954 }
955 break;
956
957 case HID_UP_DIGITIZER:
958 if ((field->application & 0xff) == 0x01) /* Digitizer */
959 __set_bit(INPUT_PROP_POINTER, input->propbit);
960 else if ((field->application & 0xff) == 0x02) /* Pen */
961 __set_bit(INPUT_PROP_DIRECT, input->propbit);
962
963 switch (usage->hid & 0xff) {
964 case 0x00: /* Undefined */
965 goto ignore;
966
967 case 0x30: /* TipPressure */
968 if (!test_bit(BTN_TOUCH, input->keybit)) {
969 device->quirks |= HID_QUIRK_NOTOUCH;
970 set_bit(EV_KEY, input->evbit);
971 set_bit(BTN_TOUCH, input->keybit);
972 }
973 map_abs_clear(ABS_PRESSURE);
974 break;
975
976 case 0x32: /* InRange */
977 switch (field->physical) {
978 case HID_DG_PUCK:
979 map_key(BTN_TOOL_MOUSE);
980 break;
981 case HID_DG_FINGER:
982 map_key(BTN_TOOL_FINGER);
983 break;
984 default:
985 /*
986 * If the physical is not given,
987 * rely on the application.
988 */
989 if (!field->physical) {
990 switch (field->application) {
991 case HID_DG_TOUCHSCREEN:
992 case HID_DG_TOUCHPAD:
993 map_key_clear(BTN_TOOL_FINGER);
994 break;
995 default:
996 map_key_clear(BTN_TOOL_PEN);
997 }
998 } else {
999 map_key(BTN_TOOL_PEN);
1000 }
1001 break;
1002 }
1003 break;
1004
1005 case 0x3b: /* Battery Strength */
1006 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1007 usage->type = EV_PWR;
1008 return;
1009
1010 case 0x3c: /* Invert */
1011 device->quirks &= ~HID_QUIRK_NOINVERT;
1012 map_key_clear(BTN_TOOL_RUBBER);
1013 break;
1014
1015 case 0x3d: /* X Tilt */
1016 map_abs_clear(ABS_TILT_X);
1017 break;
1018
1019 case 0x3e: /* Y Tilt */
1020 map_abs_clear(ABS_TILT_Y);
1021 break;
1022
1023 case 0x33: /* Touch */
1024 case 0x42: /* TipSwitch */
1025 case 0x43: /* TipSwitch2 */
1026 device->quirks &= ~HID_QUIRK_NOTOUCH;
1027 map_key_clear(BTN_TOUCH);
1028 break;
1029
1030 case 0x44: /* BarrelSwitch */
1031 map_key_clear(BTN_STYLUS);
1032 break;
1033
1034 case 0x45: /* ERASER */
1035 /*
1036 * This event is reported when eraser tip touches the surface.
1037 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1038 * by Invert if tool reports proximity or by Eraser directly.
1039 */
1040 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1041 device->quirks |= HID_QUIRK_NOINVERT;
1042 set_bit(BTN_TOOL_RUBBER, input->keybit);
1043 }
1044 map_key_clear(BTN_TOUCH);
1045 break;
1046
1047 case 0x46: /* TabletPick */
1048 case 0x5a: /* SecondaryBarrelSwitch */
1049 map_key_clear(BTN_STYLUS2);
1050 break;
1051
1052 case 0x5b: /* TransducerSerialNumber */
1053 case 0x6e: /* TransducerSerialNumber2 */
1054 map_msc(MSC_SERIAL);
1055 break;
1056
1057 default: goto unknown;
1058 }
1059 break;
1060
1061 case HID_UP_TELEPHONY:
1062 switch (usage->hid & HID_USAGE) {
1063 case 0x2f: map_key_clear(KEY_MICMUTE); break;
1064 case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1065 case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1066 case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1067 case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1068 case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1069 case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1070 case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1071 case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1072 case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1073 case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1074 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1075 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1076 case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1077 case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1078 case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1079 case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1080 default: goto ignore;
1081 }
1082 break;
1083
1084 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1085 switch (usage->hid & HID_USAGE) {
1086 case 0x000: goto ignore;
1087 case 0x030: map_key_clear(KEY_POWER); break;
1088 case 0x031: map_key_clear(KEY_RESTART); break;
1089 case 0x032: map_key_clear(KEY_SLEEP); break;
1090 case 0x034: map_key_clear(KEY_SLEEP); break;
1091 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1092 case 0x036: map_key_clear(BTN_MISC); break;
1093
1094 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1095 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1096 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1097 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1098 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1099 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1100 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1101 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1102 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1103
1104 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1105 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1106 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1107 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1108 case 0x069: map_key_clear(KEY_RED); break;
1109 case 0x06a: map_key_clear(KEY_GREEN); break;
1110 case 0x06b: map_key_clear(KEY_BLUE); break;
1111 case 0x06c: map_key_clear(KEY_YELLOW); break;
1112 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1113
1114 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1115 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1116 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1117 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1118 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1119 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1120
1121 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1122 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1123 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1124
1125 case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1126 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1127 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1128
1129 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1130 case 0x083: map_key_clear(KEY_LAST); break;
1131 case 0x084: map_key_clear(KEY_ENTER); break;
1132 case 0x088: map_key_clear(KEY_PC); break;
1133 case 0x089: map_key_clear(KEY_TV); break;
1134 case 0x08a: map_key_clear(KEY_WWW); break;
1135 case 0x08b: map_key_clear(KEY_DVD); break;
1136 case 0x08c: map_key_clear(KEY_PHONE); break;
1137 case 0x08d: map_key_clear(KEY_PROGRAM); break;
1138 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1139 case 0x08f: map_key_clear(KEY_GAMES); break;
1140 case 0x090: map_key_clear(KEY_MEMO); break;
1141 case 0x091: map_key_clear(KEY_CD); break;
1142 case 0x092: map_key_clear(KEY_VCR); break;
1143 case 0x093: map_key_clear(KEY_TUNER); break;
1144 case 0x094: map_key_clear(KEY_EXIT); break;
1145 case 0x095: map_key_clear(KEY_HELP); break;
1146 case 0x096: map_key_clear(KEY_TAPE); break;
1147 case 0x097: map_key_clear(KEY_TV2); break;
1148 case 0x098: map_key_clear(KEY_SAT); break;
1149 case 0x09a: map_key_clear(KEY_PVR); break;
1150
1151 case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1152 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1153 case 0x0a0: map_key_clear(KEY_VCR2); break;
1154
1155 case 0x0b0: map_key_clear(KEY_PLAY); break;
1156 case 0x0b1: map_key_clear(KEY_PAUSE); break;
1157 case 0x0b2: map_key_clear(KEY_RECORD); break;
1158 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1159 case 0x0b4: map_key_clear(KEY_REWIND); break;
1160 case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1161 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1162 case 0x0b7: map_key_clear(KEY_STOPCD); break;
1163 case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1164 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1165 case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1166 case 0x0bf: map_key_clear(KEY_SLOW); break;
1167
1168 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1169 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1170
1171 case 0x0d8: map_key_clear(KEY_DICTATE); break;
1172 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1173
1174 case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1175 case 0x0e2: map_key_clear(KEY_MUTE); break;
1176 case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1177 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1178 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1179 case 0x0f5: map_key_clear(KEY_SLOW); break;
1180
1181 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1182 case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1183 case 0x183: map_key_clear(KEY_CONFIG); break;
1184 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1185 case 0x185: map_key_clear(KEY_EDITOR); break;
1186 case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1187 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1188 case 0x188: map_key_clear(KEY_PRESENTATION); break;
1189 case 0x189: map_key_clear(KEY_DATABASE); break;
1190 case 0x18a: map_key_clear(KEY_MAIL); break;
1191 case 0x18b: map_key_clear(KEY_NEWS); break;
1192 case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1193 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1194 case 0x18e: map_key_clear(KEY_CALENDAR); break;
1195 case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1196 case 0x190: map_key_clear(KEY_JOURNAL); break;
1197 case 0x191: map_key_clear(KEY_FINANCE); break;
1198 case 0x192: map_key_clear(KEY_CALC); break;
1199 case 0x193: map_key_clear(KEY_PLAYER); break;
1200 case 0x194: map_key_clear(KEY_FILE); break;
1201 case 0x196: map_key_clear(KEY_WWW); break;
1202 case 0x199: map_key_clear(KEY_CHAT); break;
1203 case 0x19c: map_key_clear(KEY_LOGOFF); break;
1204 case 0x19e: map_key_clear(KEY_COFFEE); break;
1205 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1206 case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1207 case 0x1a3: map_key_clear(KEY_NEXT); break;
1208 case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1209 case 0x1a6: map_key_clear(KEY_HELP); break;
1210 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1211 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1212 case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1213 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1214 case 0x1b4: map_key_clear(KEY_FILE); break;
1215 case 0x1b6: map_key_clear(KEY_IMAGES); break;
1216 case 0x1b7: map_key_clear(KEY_AUDIO); break;
1217 case 0x1b8: map_key_clear(KEY_VIDEO); break;
1218 case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1219 case 0x1bd: map_key_clear(KEY_INFO); break;
1220 case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1221 case 0x201: map_key_clear(KEY_NEW); break;
1222 case 0x202: map_key_clear(KEY_OPEN); break;
1223 case 0x203: map_key_clear(KEY_CLOSE); break;
1224 case 0x204: map_key_clear(KEY_EXIT); break;
1225 case 0x207: map_key_clear(KEY_SAVE); break;
1226 case 0x208: map_key_clear(KEY_PRINT); break;
1227 case 0x209: map_key_clear(KEY_PROPS); break;
1228 case 0x21a: map_key_clear(KEY_UNDO); break;
1229 case 0x21b: map_key_clear(KEY_COPY); break;
1230 case 0x21c: map_key_clear(KEY_CUT); break;
1231 case 0x21d: map_key_clear(KEY_PASTE); break;
1232 case 0x21f: map_key_clear(KEY_FIND); break;
1233 case 0x221: map_key_clear(KEY_SEARCH); break;
1234 case 0x222: map_key_clear(KEY_GOTO); break;
1235 case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1236 case 0x224: map_key_clear(KEY_BACK); break;
1237 case 0x225: map_key_clear(KEY_FORWARD); break;
1238 case 0x226: map_key_clear(KEY_STOP); break;
1239 case 0x227: map_key_clear(KEY_REFRESH); break;
1240 case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1241 case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1242 case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1243 case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1244 case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1245 case 0x233: map_key_clear(KEY_SCROLLUP); break;
1246 case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1247 case 0x238: /* AC Pan */
1248 set_bit(REL_HWHEEL, input->relbit);
1249 map_rel(REL_HWHEEL_HI_RES);
1250 break;
1251 case 0x23d: map_key_clear(KEY_EDIT); break;
1252 case 0x25f: map_key_clear(KEY_CANCEL); break;
1253 case 0x269: map_key_clear(KEY_INSERT); break;
1254 case 0x26a: map_key_clear(KEY_DELETE); break;
1255 case 0x279: map_key_clear(KEY_REDO); break;
1256
1257 case 0x289: map_key_clear(KEY_REPLY); break;
1258 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1259 case 0x28c: map_key_clear(KEY_SEND); break;
1260
1261 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1262
1263 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1264
1265 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1266 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1267 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1268 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1269 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1270 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1271
1272 case 0x29f: map_key_clear(KEY_SCALE); break;
1273
1274 default: map_key_clear(KEY_UNKNOWN);
1275 }
1276 break;
1277
1278 case HID_UP_GENDEVCTRLS:
1279 switch (usage->hid) {
1280 case HID_DC_BATTERYSTRENGTH:
1281 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1282 usage->type = EV_PWR;
1283 return;
1284 }
1285 goto unknown;
1286
1287 case HID_UP_BATTERY:
1288 switch (usage->hid) {
1289 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1290 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1291 usage->type = EV_PWR;
1292 return;
1293 case HID_BAT_CHARGING:
1294 usage->type = EV_PWR;
1295 return;
1296 }
1297 goto unknown;
1298 case HID_UP_CAMERA:
1299 switch (usage->hid & HID_USAGE) {
1300 case 0x020:
1301 map_key_clear(KEY_CAMERA_FOCUS); break;
1302 case 0x021:
1303 map_key_clear(KEY_CAMERA); break;
1304 default:
1305 goto ignore;
1306 }
1307 break;
1308
1309 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1310 set_bit(EV_REP, input->evbit);
1311 switch (usage->hid & HID_USAGE) {
1312 case 0x021: map_key_clear(KEY_PRINT); break;
1313 case 0x070: map_key_clear(KEY_HP); break;
1314 case 0x071: map_key_clear(KEY_CAMERA); break;
1315 case 0x072: map_key_clear(KEY_SOUND); break;
1316 case 0x073: map_key_clear(KEY_QUESTION); break;
1317 case 0x080: map_key_clear(KEY_EMAIL); break;
1318 case 0x081: map_key_clear(KEY_CHAT); break;
1319 case 0x082: map_key_clear(KEY_SEARCH); break;
1320 case 0x083: map_key_clear(KEY_CONNECT); break;
1321 case 0x084: map_key_clear(KEY_FINANCE); break;
1322 case 0x085: map_key_clear(KEY_SPORT); break;
1323 case 0x086: map_key_clear(KEY_SHOP); break;
1324 default: goto ignore;
1325 }
1326 break;
1327
1328 case HID_UP_HPVENDOR2:
1329 set_bit(EV_REP, input->evbit);
1330 switch (usage->hid & HID_USAGE) {
1331 case 0x001: map_key_clear(KEY_MICMUTE); break;
1332 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1333 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1334 default: goto ignore;
1335 }
1336 break;
1337
1338 case HID_UP_MSVENDOR:
1339 goto ignore;
1340
1341 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1342 set_bit(EV_REP, input->evbit);
1343 goto ignore;
1344
1345 case HID_UP_LOGIVENDOR:
1346 /* intentional fallback */
1347 case HID_UP_LOGIVENDOR2:
1348 /* intentional fallback */
1349 case HID_UP_LOGIVENDOR3:
1350 goto ignore;
1351
1352 case HID_UP_PID:
1353 switch (usage->hid & HID_USAGE) {
1354 case 0xa4: map_key_clear(BTN_DEAD); break;
1355 default: goto ignore;
1356 }
1357 break;
1358
1359 default:
1360 unknown:
1361 if (field->report_size == 1) {
1362 if (field->report->type == HID_OUTPUT_REPORT) {
1363 map_led(LED_MISC);
1364 break;
1365 }
1366 map_key(BTN_MISC);
1367 break;
1368 }
1369 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1370 map_rel(REL_MISC);
1371 break;
1372 }
1373 map_abs(ABS_MISC);
1374 break;
1375 }
1376
1377 mapped:
1378 /* Mapping failed, bail out */
1379 if (!bit)
1380 return;
1381
1382 if (device->driver->input_mapped &&
1383 device->driver->input_mapped(device, hidinput, field, usage,
1384 &bit, &max) < 0) {
1385 /*
1386 * The driver indicated that no further generic handling
1387 * of the usage is desired.
1388 */
1389 return;
1390 }
1391
1392 set_bit(usage->type, input->evbit);
1393
1394 /*
1395 * This part is *really* controversial:
1396 * - HID aims at being generic so we should do our best to export
1397 * all incoming events
1398 * - HID describes what events are, so there is no reason for ABS_X
1399 * to be mapped to ABS_Y
1400 * - HID is using *_MISC+N as a default value, but nothing prevents
1401 * *_MISC+N to overwrite a legitimate even, which confuses userspace
1402 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1403 * processing)
1404 *
1405 * If devices still want to use this (at their own risk), they will
1406 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1407 * the default should be a reliable mapping.
1408 */
1409 while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1410 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1411 usage->code = find_next_zero_bit(bit,
1412 max + 1,
1413 usage->code);
1414 } else {
1415 device->status |= HID_STAT_DUP_DETECTED;
1416 goto ignore;
1417 }
1418 }
1419
1420 if (usage->code > max)
1421 goto ignore;
1422
1423 if (usage->type == EV_ABS) {
1424
1425 int a = field->logical_minimum;
1426 int b = field->logical_maximum;
1427
1428 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1429 a = field->logical_minimum = 0;
1430 b = field->logical_maximum = 255;
1431 }
1432
1433 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1434 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1435 else input_set_abs_params(input, usage->code, a, b, 0, 0);
1436
1437 input_abs_set_res(input, usage->code,
1438 hidinput_calc_abs_res(field, usage->code));
1439
1440 /* use a larger default input buffer for MT devices */
1441 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1442 input_set_events_per_packet(input, 60);
1443 }
1444
1445 if (usage->type == EV_ABS &&
1446 (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1447 int i;
1448 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1449 input_set_abs_params(input, i, -1, 1, 0, 0);
1450 set_bit(i, input->absbit);
1451 }
1452 if (usage->hat_dir && !field->dpad)
1453 field->dpad = usage->code;
1454 }
1455
1456 /* for those devices which produce Consumer volume usage as relative,
1457 * we emulate pressing volumeup/volumedown appropriate number of times
1458 * in hidinput_hid_event()
1459 */
1460 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1461 (usage->code == ABS_VOLUME)) {
1462 set_bit(KEY_VOLUMEUP, input->keybit);
1463 set_bit(KEY_VOLUMEDOWN, input->keybit);
1464 }
1465
1466 if (usage->type == EV_KEY) {
1467 set_bit(EV_MSC, input->evbit);
1468 set_bit(MSC_SCAN, input->mscbit);
1469 }
1470
1471 return;
1472
1473 ignore:
1474 usage->type = 0;
1475 usage->code = 0;
1476 }
1477
hidinput_handle_scroll(struct hid_usage * usage,struct input_dev * input,__s32 value)1478 static void hidinput_handle_scroll(struct hid_usage *usage,
1479 struct input_dev *input,
1480 __s32 value)
1481 {
1482 int code;
1483 int hi_res, lo_res;
1484
1485 if (value == 0)
1486 return;
1487
1488 if (usage->code == REL_WHEEL_HI_RES)
1489 code = REL_WHEEL;
1490 else
1491 code = REL_HWHEEL;
1492
1493 /*
1494 * Windows reports one wheel click as value 120. Where a high-res
1495 * scroll wheel is present, a fraction of 120 is reported instead.
1496 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1497 * adhere to the 120 expectation.
1498 */
1499 hi_res = value * 120/usage->resolution_multiplier;
1500
1501 usage->wheel_accumulated += hi_res;
1502 lo_res = usage->wheel_accumulated/120;
1503 if (lo_res)
1504 usage->wheel_accumulated -= lo_res * 120;
1505
1506 input_event(input, EV_REL, code, lo_res);
1507 input_event(input, EV_REL, usage->code, hi_res);
1508 }
1509
hid_report_release_tool(struct hid_report * report,struct input_dev * input,unsigned int tool)1510 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1511 unsigned int tool)
1512 {
1513 /* if the given tool is not currently reported, ignore */
1514 if (!test_bit(tool, input->key))
1515 return;
1516
1517 /*
1518 * if the given tool was previously set, release it,
1519 * release any TOUCH and send an EV_SYN
1520 */
1521 input_event(input, EV_KEY, BTN_TOUCH, 0);
1522 input_event(input, EV_KEY, tool, 0);
1523 input_event(input, EV_SYN, SYN_REPORT, 0);
1524
1525 report->tool = 0;
1526 }
1527
hid_report_set_tool(struct hid_report * report,struct input_dev * input,unsigned int new_tool)1528 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1529 unsigned int new_tool)
1530 {
1531 if (report->tool != new_tool)
1532 hid_report_release_tool(report, input, report->tool);
1533
1534 input_event(input, EV_KEY, new_tool, 1);
1535 report->tool = new_tool;
1536 }
1537
hidinput_hid_event(struct hid_device * hid,struct hid_field * field,struct hid_usage * usage,__s32 value)1538 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1539 {
1540 struct input_dev *input;
1541 struct hid_report *report = field->report;
1542 unsigned *quirks = &hid->quirks;
1543
1544 if (!usage->type)
1545 return;
1546
1547 if (usage->type == EV_PWR) {
1548 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1549
1550 if (!handled)
1551 hidinput_update_battery(hid, value);
1552
1553 return;
1554 }
1555
1556 if (!field->hidinput)
1557 return;
1558
1559 input = field->hidinput->input;
1560
1561 if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1562 int hat_dir = usage->hat_dir;
1563 if (!hat_dir)
1564 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1565 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1566 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1567 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1568 return;
1569 }
1570
1571 /*
1572 * Ignore out-of-range values as per HID specification,
1573 * section 5.10 and 6.2.25, when NULL state bit is present.
1574 * When it's not, clamp the value to match Microsoft's input
1575 * driver as mentioned in "Required HID usages for digitizers":
1576 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1577 *
1578 * The logical_minimum < logical_maximum check is done so that we
1579 * don't unintentionally discard values sent by devices which
1580 * don't specify logical min and max.
1581 */
1582 if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1583 field->logical_minimum < field->logical_maximum) {
1584 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1585 (value < field->logical_minimum ||
1586 value > field->logical_maximum)) {
1587 dbg_hid("Ignoring out-of-range value %x\n", value);
1588 return;
1589 }
1590 value = clamp(value,
1591 field->logical_minimum,
1592 field->logical_maximum);
1593 }
1594
1595 switch (usage->hid) {
1596 case HID_DG_ERASER:
1597 report->tool_active |= !!value;
1598
1599 /*
1600 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1601 * to accommodate for devices not following the spec.
1602 */
1603 if (value)
1604 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1605 else if (report->tool != BTN_TOOL_RUBBER)
1606 /* value is off, tool is not rubber, ignore */
1607 return;
1608 else if (*quirks & HID_QUIRK_NOINVERT &&
1609 !test_bit(BTN_TOUCH, input->key)) {
1610 /*
1611 * There is no invert to release the tool, let hid_input
1612 * send BTN_TOUCH with scancode and release the tool after.
1613 */
1614 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1615 return;
1616 }
1617
1618 /* let hid-input set BTN_TOUCH */
1619 break;
1620
1621 case HID_DG_INVERT:
1622 report->tool_active |= !!value;
1623
1624 /*
1625 * If invert is set, we store BTN_TOOL_RUBBER.
1626 */
1627 if (value)
1628 hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1629 else if (!report->tool_active)
1630 /* tool_active not set means Invert and Eraser are not set */
1631 hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1632
1633 /* no further processing */
1634 return;
1635
1636 case HID_DG_INRANGE:
1637 report->tool_active |= !!value;
1638
1639 if (report->tool_active) {
1640 /*
1641 * if tool is not set but is marked as active,
1642 * assume ours
1643 */
1644 if (!report->tool)
1645 report->tool = usage->code;
1646
1647 /* drivers may have changed the value behind our back, resend it */
1648 hid_report_set_tool(report, input, report->tool);
1649 } else {
1650 hid_report_release_tool(report, input, usage->code);
1651 }
1652
1653 /* reset tool_active for the next event */
1654 report->tool_active = false;
1655
1656 /* no further processing */
1657 return;
1658
1659 case HID_DG_TIPSWITCH:
1660 report->tool_active |= !!value;
1661
1662 /* if tool is set to RUBBER we should ignore the current value */
1663 if (report->tool == BTN_TOOL_RUBBER)
1664 return;
1665
1666 break;
1667
1668 case HID_DG_TIPPRESSURE:
1669 if (*quirks & HID_QUIRK_NOTOUCH) {
1670 int a = field->logical_minimum;
1671 int b = field->logical_maximum;
1672
1673 if (value > a + ((b - a) >> 3)) {
1674 input_event(input, EV_KEY, BTN_TOUCH, 1);
1675 report->tool_active = true;
1676 }
1677 }
1678 break;
1679
1680 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1681 dbg_hid("Maximum Effects - %d\n",value);
1682 return;
1683
1684 case HID_UP_PID | 0x7fUL:
1685 dbg_hid("PID Pool Report\n");
1686 return;
1687 }
1688
1689 switch (usage->type) {
1690 case EV_KEY:
1691 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1692 return;
1693 break;
1694
1695 case EV_REL:
1696 if (usage->code == REL_WHEEL_HI_RES ||
1697 usage->code == REL_HWHEEL_HI_RES) {
1698 hidinput_handle_scroll(usage, input, value);
1699 return;
1700 }
1701 break;
1702
1703 case EV_ABS:
1704 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1705 usage->code == ABS_VOLUME) {
1706 int count = abs(value);
1707 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1708 int i;
1709
1710 for (i = 0; i < count; i++) {
1711 input_event(input, EV_KEY, direction, 1);
1712 input_sync(input);
1713 input_event(input, EV_KEY, direction, 0);
1714 input_sync(input);
1715 }
1716 return;
1717
1718 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1719 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1720 value = field->logical_maximum - value;
1721 break;
1722 }
1723
1724 /*
1725 * Ignore reports for absolute data if the data didn't change. This is
1726 * not only an optimization but also fixes 'dead' key reports. Some
1727 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1728 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1729 * can only have one of them physically available. The 'dead' keys
1730 * report constant 0. As all map to the same keycode, they'd confuse
1731 * the input layer. If we filter the 'dead' keys on the HID level, we
1732 * skip the keycode translation and only forward real events.
1733 */
1734 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1735 HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1736 (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1737 usage->usage_index < field->maxusage &&
1738 value == field->value[usage->usage_index])
1739 return;
1740
1741 /* report the usage code as scancode if the key status has changed */
1742 if (usage->type == EV_KEY &&
1743 (!test_bit(usage->code, input->key)) == value)
1744 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1745
1746 input_event(input, usage->type, usage->code, value);
1747
1748 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1749 usage->type == EV_KEY && value) {
1750 input_sync(input);
1751 input_event(input, usage->type, usage->code, 0);
1752 }
1753 }
1754
hidinput_report_event(struct hid_device * hid,struct hid_report * report)1755 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1756 {
1757 struct hid_input *hidinput;
1758
1759 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1760 return;
1761
1762 list_for_each_entry(hidinput, &hid->inputs, list)
1763 input_sync(hidinput->input);
1764 }
1765 EXPORT_SYMBOL_GPL(hidinput_report_event);
1766
hidinput_find_field(struct hid_device * hid,unsigned int type,unsigned int code,struct hid_field ** field)1767 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1768 unsigned int code, struct hid_field **field)
1769 {
1770 struct hid_report *report;
1771 int i, j;
1772
1773 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1774 for (i = 0; i < report->maxfield; i++) {
1775 *field = report->field[i];
1776 for (j = 0; j < (*field)->maxusage; j++)
1777 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1778 return j;
1779 }
1780 }
1781 return -1;
1782 }
1783
hidinput_get_led_field(struct hid_device * hid)1784 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1785 {
1786 struct hid_report *report;
1787 struct hid_field *field;
1788 int i, j;
1789
1790 list_for_each_entry(report,
1791 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1792 list) {
1793 for (i = 0; i < report->maxfield; i++) {
1794 field = report->field[i];
1795 for (j = 0; j < field->maxusage; j++)
1796 if (field->usage[j].type == EV_LED)
1797 return field;
1798 }
1799 }
1800 return NULL;
1801 }
1802 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1803
hidinput_count_leds(struct hid_device * hid)1804 unsigned int hidinput_count_leds(struct hid_device *hid)
1805 {
1806 struct hid_report *report;
1807 struct hid_field *field;
1808 int i, j;
1809 unsigned int count = 0;
1810
1811 list_for_each_entry(report,
1812 &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1813 list) {
1814 for (i = 0; i < report->maxfield; i++) {
1815 field = report->field[i];
1816 for (j = 0; j < field->maxusage; j++)
1817 if (field->usage[j].type == EV_LED &&
1818 field->value[j])
1819 count += 1;
1820 }
1821 }
1822 return count;
1823 }
1824 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1825
hidinput_led_worker(struct work_struct * work)1826 static void hidinput_led_worker(struct work_struct *work)
1827 {
1828 struct hid_device *hid = container_of(work, struct hid_device,
1829 led_work);
1830 struct hid_field *field;
1831 struct hid_report *report;
1832 int ret;
1833 u32 len;
1834 __u8 *buf;
1835
1836 field = hidinput_get_led_field(hid);
1837 if (!field)
1838 return;
1839
1840 /*
1841 * field->report is accessed unlocked regarding HID core. So there might
1842 * be another incoming SET-LED request from user-space, which changes
1843 * the LED state while we assemble our outgoing buffer. However, this
1844 * doesn't matter as hid_output_report() correctly converts it into a
1845 * boolean value no matter what information is currently set on the LED
1846 * field (even garbage). So the remote device will always get a valid
1847 * request.
1848 * And in case we send a wrong value, a next led worker is spawned
1849 * for every SET-LED request so the following worker will send the
1850 * correct value, guaranteed!
1851 */
1852
1853 report = field->report;
1854
1855 /* use custom SET_REPORT request if possible (asynchronous) */
1856 if (hid->ll_driver->request)
1857 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1858
1859 /* fall back to generic raw-output-report */
1860 len = hid_report_len(report);
1861 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1862 if (!buf)
1863 return;
1864
1865 hid_output_report(report, buf);
1866 /* synchronous output report */
1867 ret = hid_hw_output_report(hid, buf, len);
1868 if (ret == -ENOSYS)
1869 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1870 HID_REQ_SET_REPORT);
1871 kfree(buf);
1872 }
1873
hidinput_input_event(struct input_dev * dev,unsigned int type,unsigned int code,int value)1874 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1875 unsigned int code, int value)
1876 {
1877 struct hid_device *hid = input_get_drvdata(dev);
1878 struct hid_field *field;
1879 int offset;
1880
1881 if (type == EV_FF)
1882 return input_ff_event(dev, type, code, value);
1883
1884 if (type != EV_LED)
1885 return -1;
1886
1887 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1888 hid_warn(dev, "event field not found\n");
1889 return -1;
1890 }
1891
1892 hid_set_field(field, offset, value);
1893
1894 schedule_work(&hid->led_work);
1895 return 0;
1896 }
1897
hidinput_open(struct input_dev * dev)1898 static int hidinput_open(struct input_dev *dev)
1899 {
1900 struct hid_device *hid = input_get_drvdata(dev);
1901
1902 return hid_hw_open(hid);
1903 }
1904
hidinput_close(struct input_dev * dev)1905 static void hidinput_close(struct input_dev *dev)
1906 {
1907 struct hid_device *hid = input_get_drvdata(dev);
1908
1909 hid_hw_close(hid);
1910 }
1911
__hidinput_change_resolution_multipliers(struct hid_device * hid,struct hid_report * report,bool use_logical_max)1912 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1913 struct hid_report *report, bool use_logical_max)
1914 {
1915 struct hid_usage *usage;
1916 bool update_needed = false;
1917 bool get_report_completed = false;
1918 int i, j;
1919
1920 if (report->maxfield == 0)
1921 return false;
1922
1923 for (i = 0; i < report->maxfield; i++) {
1924 __s32 value = use_logical_max ?
1925 report->field[i]->logical_maximum :
1926 report->field[i]->logical_minimum;
1927
1928 /* There is no good reason for a Resolution
1929 * Multiplier to have a count other than 1.
1930 * Ignore that case.
1931 */
1932 if (report->field[i]->report_count != 1)
1933 continue;
1934
1935 for (j = 0; j < report->field[i]->maxusage; j++) {
1936 usage = &report->field[i]->usage[j];
1937
1938 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1939 continue;
1940
1941 /*
1942 * If we have more than one feature within this
1943 * report we need to fill in the bits from the
1944 * others before we can overwrite the ones for the
1945 * Resolution Multiplier.
1946 *
1947 * But if we're not allowed to read from the device,
1948 * we just bail. Such a device should not exist
1949 * anyway.
1950 */
1951 if (!get_report_completed && report->maxfield > 1) {
1952 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1953 return update_needed;
1954
1955 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1956 hid_hw_wait(hid);
1957 get_report_completed = true;
1958 }
1959
1960 report->field[i]->value[j] = value;
1961 update_needed = true;
1962 }
1963 }
1964
1965 return update_needed;
1966 }
1967
hidinput_change_resolution_multipliers(struct hid_device * hid)1968 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1969 {
1970 struct hid_report_enum *rep_enum;
1971 struct hid_report *rep;
1972 int ret;
1973
1974 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1975 list_for_each_entry(rep, &rep_enum->report_list, list) {
1976 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1977 rep, true);
1978
1979 if (update_needed) {
1980 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1981 if (ret) {
1982 __hidinput_change_resolution_multipliers(hid,
1983 rep, false);
1984 return;
1985 }
1986 }
1987 }
1988
1989 /* refresh our structs */
1990 hid_setup_resolution_multiplier(hid);
1991 }
1992
report_features(struct hid_device * hid)1993 static void report_features(struct hid_device *hid)
1994 {
1995 struct hid_driver *drv = hid->driver;
1996 struct hid_report_enum *rep_enum;
1997 struct hid_report *rep;
1998 struct hid_usage *usage;
1999 int i, j;
2000
2001 rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2002 list_for_each_entry(rep, &rep_enum->report_list, list)
2003 for (i = 0; i < rep->maxfield; i++) {
2004 /* Ignore if report count is out of bounds. */
2005 if (rep->field[i]->report_count < 1)
2006 continue;
2007
2008 for (j = 0; j < rep->field[i]->maxusage; j++) {
2009 usage = &rep->field[i]->usage[j];
2010
2011 /* Verify if Battery Strength feature is available */
2012 if (usage->hid == HID_DC_BATTERYSTRENGTH)
2013 hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2014 rep->field[i], false);
2015
2016 if (drv->feature_mapping)
2017 drv->feature_mapping(hid, rep->field[i], usage);
2018 }
2019 }
2020 }
2021
hidinput_allocate(struct hid_device * hid,unsigned int application)2022 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2023 unsigned int application)
2024 {
2025 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2026 struct input_dev *input_dev = input_allocate_device();
2027 const char *suffix = NULL;
2028 size_t suffix_len, name_len;
2029
2030 if (!hidinput || !input_dev)
2031 goto fail;
2032
2033 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2034 hid->maxapplication > 1) {
2035 switch (application) {
2036 case HID_GD_KEYBOARD:
2037 suffix = "Keyboard";
2038 break;
2039 case HID_GD_KEYPAD:
2040 suffix = "Keypad";
2041 break;
2042 case HID_GD_MOUSE:
2043 suffix = "Mouse";
2044 break;
2045 case HID_DG_PEN:
2046 /*
2047 * yes, there is an issue here:
2048 * DG_PEN -> "Stylus"
2049 * DG_STYLUS -> "Pen"
2050 * But changing this now means users with config snippets
2051 * will have to change it and the test suite will not be happy.
2052 */
2053 suffix = "Stylus";
2054 break;
2055 case HID_DG_STYLUS:
2056 suffix = "Pen";
2057 break;
2058 case HID_DG_TOUCHSCREEN:
2059 suffix = "Touchscreen";
2060 break;
2061 case HID_DG_TOUCHPAD:
2062 suffix = "Touchpad";
2063 break;
2064 case HID_GD_SYSTEM_CONTROL:
2065 suffix = "System Control";
2066 break;
2067 case HID_CP_CONSUMER_CONTROL:
2068 suffix = "Consumer Control";
2069 break;
2070 case HID_GD_WIRELESS_RADIO_CTLS:
2071 suffix = "Wireless Radio Control";
2072 break;
2073 case HID_GD_SYSTEM_MULTIAXIS:
2074 suffix = "System Multi Axis";
2075 break;
2076 default:
2077 break;
2078 }
2079 }
2080
2081 if (suffix) {
2082 name_len = strlen(hid->name);
2083 suffix_len = strlen(suffix);
2084 if ((name_len < suffix_len) ||
2085 strcmp(hid->name + name_len - suffix_len, suffix)) {
2086 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2087 hid->name, suffix);
2088 if (!hidinput->name)
2089 goto fail;
2090 }
2091 }
2092
2093 input_set_drvdata(input_dev, hid);
2094 input_dev->event = hidinput_input_event;
2095 input_dev->open = hidinput_open;
2096 input_dev->close = hidinput_close;
2097 input_dev->setkeycode = hidinput_setkeycode;
2098 input_dev->getkeycode = hidinput_getkeycode;
2099
2100 input_dev->name = hidinput->name ? hidinput->name : hid->name;
2101 input_dev->phys = hid->phys;
2102 input_dev->uniq = hid->uniq;
2103 input_dev->id.bustype = hid->bus;
2104 input_dev->id.vendor = hid->vendor;
2105 input_dev->id.product = hid->product;
2106 input_dev->id.version = hid->version;
2107 input_dev->dev.parent = &hid->dev;
2108
2109 hidinput->input = input_dev;
2110 hidinput->application = application;
2111 list_add_tail(&hidinput->list, &hid->inputs);
2112
2113 INIT_LIST_HEAD(&hidinput->reports);
2114
2115 return hidinput;
2116
2117 fail:
2118 kfree(hidinput);
2119 input_free_device(input_dev);
2120 hid_err(hid, "Out of memory during hid input probe\n");
2121 return NULL;
2122 }
2123
hidinput_has_been_populated(struct hid_input * hidinput)2124 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2125 {
2126 int i;
2127 unsigned long r = 0;
2128
2129 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2130 r |= hidinput->input->evbit[i];
2131
2132 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2133 r |= hidinput->input->keybit[i];
2134
2135 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2136 r |= hidinput->input->relbit[i];
2137
2138 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2139 r |= hidinput->input->absbit[i];
2140
2141 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2142 r |= hidinput->input->mscbit[i];
2143
2144 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2145 r |= hidinput->input->ledbit[i];
2146
2147 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2148 r |= hidinput->input->sndbit[i];
2149
2150 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2151 r |= hidinput->input->ffbit[i];
2152
2153 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2154 r |= hidinput->input->swbit[i];
2155
2156 return !!r;
2157 }
2158
hidinput_cleanup_hidinput(struct hid_device * hid,struct hid_input * hidinput)2159 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2160 struct hid_input *hidinput)
2161 {
2162 struct hid_report *report;
2163 int i, k;
2164
2165 list_del(&hidinput->list);
2166 input_free_device(hidinput->input);
2167 kfree(hidinput->name);
2168
2169 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2170 if (k == HID_OUTPUT_REPORT &&
2171 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2172 continue;
2173
2174 list_for_each_entry(report, &hid->report_enum[k].report_list,
2175 list) {
2176
2177 for (i = 0; i < report->maxfield; i++)
2178 if (report->field[i]->hidinput == hidinput)
2179 report->field[i]->hidinput = NULL;
2180 }
2181 }
2182
2183 kfree(hidinput);
2184 }
2185
hidinput_match(struct hid_report * report)2186 static struct hid_input *hidinput_match(struct hid_report *report)
2187 {
2188 struct hid_device *hid = report->device;
2189 struct hid_input *hidinput;
2190
2191 list_for_each_entry(hidinput, &hid->inputs, list) {
2192 if (hidinput->report &&
2193 hidinput->report->id == report->id)
2194 return hidinput;
2195 }
2196
2197 return NULL;
2198 }
2199
hidinput_match_application(struct hid_report * report)2200 static struct hid_input *hidinput_match_application(struct hid_report *report)
2201 {
2202 struct hid_device *hid = report->device;
2203 struct hid_input *hidinput;
2204
2205 list_for_each_entry(hidinput, &hid->inputs, list) {
2206 if (hidinput->application == report->application)
2207 return hidinput;
2208
2209 /*
2210 * Keep SystemControl and ConsumerControl applications together
2211 * with the main keyboard, if present.
2212 */
2213 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2214 report->application == HID_CP_CONSUMER_CONTROL) &&
2215 hidinput->application == HID_GD_KEYBOARD) {
2216 return hidinput;
2217 }
2218 }
2219
2220 return NULL;
2221 }
2222
hidinput_configure_usages(struct hid_input * hidinput,struct hid_report * report)2223 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2224 struct hid_report *report)
2225 {
2226 int i, j, k;
2227 int first_field_index = 0;
2228 int slot_collection_index = -1;
2229 int prev_collection_index = -1;
2230 unsigned int slot_idx = 0;
2231 struct hid_field *field;
2232
2233 /*
2234 * First tag all the fields that are part of a slot,
2235 * a slot needs to have one Contact ID in the collection
2236 */
2237 for (i = 0; i < report->maxfield; i++) {
2238 field = report->field[i];
2239
2240 /* ignore fields without usage */
2241 if (field->maxusage < 1)
2242 continue;
2243
2244 /*
2245 * janitoring when collection_index changes
2246 */
2247 if (prev_collection_index != field->usage->collection_index) {
2248 prev_collection_index = field->usage->collection_index;
2249 first_field_index = i;
2250 }
2251
2252 /*
2253 * if we already found a Contact ID in the collection,
2254 * tag and continue to the next.
2255 */
2256 if (slot_collection_index == field->usage->collection_index) {
2257 field->slot_idx = slot_idx;
2258 continue;
2259 }
2260
2261 /* check if the current field has Contact ID */
2262 for (j = 0; j < field->maxusage; j++) {
2263 if (field->usage[j].hid == HID_DG_CONTACTID) {
2264 slot_collection_index = field->usage->collection_index;
2265 slot_idx++;
2266
2267 /*
2268 * mark all previous fields and this one in the
2269 * current collection to be slotted.
2270 */
2271 for (k = first_field_index; k <= i; k++)
2272 report->field[k]->slot_idx = slot_idx;
2273 break;
2274 }
2275 }
2276 }
2277
2278 for (i = 0; i < report->maxfield; i++)
2279 for (j = 0; j < report->field[i]->maxusage; j++)
2280 hidinput_configure_usage(hidinput, report->field[i],
2281 report->field[i]->usage + j,
2282 j);
2283 }
2284
2285 /*
2286 * Register the input device; print a message.
2287 * Configure the input layer interface
2288 * Read all reports and initialize the absolute field values.
2289 */
2290
hidinput_connect(struct hid_device * hid,unsigned int force)2291 int hidinput_connect(struct hid_device *hid, unsigned int force)
2292 {
2293 struct hid_driver *drv = hid->driver;
2294 struct hid_report *report;
2295 struct hid_input *next, *hidinput = NULL;
2296 unsigned int application;
2297 int i, k;
2298
2299 INIT_LIST_HEAD(&hid->inputs);
2300 INIT_WORK(&hid->led_work, hidinput_led_worker);
2301
2302 hid->status &= ~HID_STAT_DUP_DETECTED;
2303
2304 if (!force) {
2305 for (i = 0; i < hid->maxcollection; i++) {
2306 struct hid_collection *col = &hid->collection[i];
2307 if (col->type == HID_COLLECTION_APPLICATION ||
2308 col->type == HID_COLLECTION_PHYSICAL)
2309 if (IS_INPUT_APPLICATION(col->usage))
2310 break;
2311 }
2312
2313 if (i == hid->maxcollection)
2314 return -1;
2315 }
2316
2317 report_features(hid);
2318
2319 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2320 if (k == HID_OUTPUT_REPORT &&
2321 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2322 continue;
2323
2324 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2325
2326 if (!report->maxfield)
2327 continue;
2328
2329 application = report->application;
2330
2331 /*
2332 * Find the previous hidinput report attached
2333 * to this report id.
2334 */
2335 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2336 hidinput = hidinput_match(report);
2337 else if (hid->maxapplication > 1 &&
2338 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2339 hidinput = hidinput_match_application(report);
2340
2341 if (!hidinput) {
2342 hidinput = hidinput_allocate(hid, application);
2343 if (!hidinput)
2344 goto out_unwind;
2345 }
2346
2347 hidinput_configure_usages(hidinput, report);
2348
2349 if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2350 hidinput->report = report;
2351
2352 list_add_tail(&report->hidinput_list,
2353 &hidinput->reports);
2354 }
2355 }
2356
2357 hidinput_change_resolution_multipliers(hid);
2358
2359 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2360 if (drv->input_configured &&
2361 drv->input_configured(hid, hidinput))
2362 goto out_unwind;
2363
2364 if (!hidinput_has_been_populated(hidinput)) {
2365 /* no need to register an input device not populated */
2366 hidinput_cleanup_hidinput(hid, hidinput);
2367 continue;
2368 }
2369
2370 if (input_register_device(hidinput->input))
2371 goto out_unwind;
2372 hidinput->registered = true;
2373 }
2374
2375 if (list_empty(&hid->inputs)) {
2376 hid_err(hid, "No inputs registered, leaving\n");
2377 goto out_unwind;
2378 }
2379
2380 if (hid->status & HID_STAT_DUP_DETECTED)
2381 hid_dbg(hid,
2382 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2383
2384 return 0;
2385
2386 out_unwind:
2387 /* unwind the ones we already registered */
2388 hidinput_disconnect(hid);
2389
2390 return -1;
2391 }
2392 EXPORT_SYMBOL_GPL(hidinput_connect);
2393
hidinput_disconnect(struct hid_device * hid)2394 void hidinput_disconnect(struct hid_device *hid)
2395 {
2396 struct hid_input *hidinput, *next;
2397
2398 hidinput_cleanup_battery(hid);
2399
2400 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2401 list_del(&hidinput->list);
2402 if (hidinput->registered)
2403 input_unregister_device(hidinput->input);
2404 else
2405 input_free_device(hidinput->input);
2406 kfree(hidinput->name);
2407 kfree(hidinput);
2408 }
2409
2410 /* led_work is spawned by input_dev callbacks, but doesn't access the
2411 * parent input_dev at all. Once all input devices are removed, we
2412 * know that led_work will never get restarted, so we can cancel it
2413 * synchronously and are safe. */
2414 cancel_work_sync(&hid->led_work);
2415 }
2416 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2417
2418 #ifdef CONFIG_HID_KUNIT_TEST
2419 #include "hid-input-test.c"
2420 #endif
2421