Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
3 : * Copyright (c) 2000-2001 Vojtech Pavlik
4 : * Copyright (c) 2006-2010 Jiri Kosina
5 : *
6 : * HID to Linux Input mapping
7 : */
8 :
9 : /*
10 : *
11 : * Should you need to contact me, the author, you can do so either by
12 : * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
13 : * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
14 : */
15 :
16 : #include <linux/module.h>
17 : #include <linux/slab.h>
18 : #include <linux/kernel.h>
19 :
20 : #include <linux/hid.h>
21 : #include <linux/hid-debug.h>
22 :
23 : #include "hid-ids.h"
24 :
25 : #define unk KEY_UNKNOWN
26 :
27 : static const unsigned char hid_keyboard[256] = {
28 : 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
29 : 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
30 : 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
31 : 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
32 : 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
33 : 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
34 : 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
35 : 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
36 : 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
37 : 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
38 : unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
39 : unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
40 : unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
41 : unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
42 : 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
43 : 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
44 : };
45 :
46 : static const struct {
47 : __s32 x;
48 : __s32 y;
49 : } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
50 :
51 : struct usage_priority {
52 : __u32 usage; /* the HID usage associated */
53 : bool global; /* we assume all usages to be slotted,
54 : * unless global
55 : */
56 : unsigned int slot_overwrite; /* for globals: allows to set the usage
57 : * before or after the slots
58 : */
59 : };
60 :
61 : /*
62 : * hid-input will convert this list into priorities:
63 : * the first element will have the highest priority
64 : * (the length of the following array) and the last
65 : * element the lowest (1).
66 : *
67 : * hid-input will then shift the priority by 8 bits to leave some space
68 : * in case drivers want to interleave other fields.
69 : *
70 : * To accommodate slotted devices, the slot priority is
71 : * defined in the next 8 bits (defined by 0xff - slot).
72 : *
73 : * If drivers want to add fields before those, hid-input will
74 : * leave out the first 8 bits of the priority value.
75 : *
76 : * This still leaves us 65535 individual priority values.
77 : */
78 : static const struct usage_priority hidinput_usages_priorities[] = {
79 : { /* Eraser (eraser touching) must always come before tipswitch */
80 : .usage = HID_DG_ERASER,
81 : },
82 : { /* Invert must always come before In Range */
83 : .usage = HID_DG_INVERT,
84 : },
85 : { /* Is the tip of the tool touching? */
86 : .usage = HID_DG_TIPSWITCH,
87 : },
88 : { /* Tip Pressure might emulate tip switch */
89 : .usage = HID_DG_TIPPRESSURE,
90 : },
91 : { /* In Range needs to come after the other tool states */
92 : .usage = HID_DG_INRANGE,
93 : },
94 : };
95 :
96 : #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
97 : #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
98 : #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
99 : #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
100 : #define map_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c))
101 :
102 : #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
103 : &max, EV_ABS, (c))
104 : #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \
105 : &max, EV_KEY, (c))
106 :
107 0 : static bool match_scancode(struct hid_usage *usage,
108 : unsigned int cur_idx, unsigned int scancode)
109 : {
110 0 : return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
111 : }
112 :
113 0 : static bool match_keycode(struct hid_usage *usage,
114 : unsigned int cur_idx, unsigned int keycode)
115 : {
116 : /*
117 : * We should exclude unmapped usages when doing lookup by keycode.
118 : */
119 0 : return (usage->type == EV_KEY && usage->code == keycode);
120 : }
121 :
122 0 : static bool match_index(struct hid_usage *usage,
123 : unsigned int cur_idx, unsigned int idx)
124 : {
125 0 : return cur_idx == idx;
126 : }
127 :
128 : typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
129 : unsigned int cur_idx, unsigned int val);
130 :
131 0 : static struct hid_usage *hidinput_find_key(struct hid_device *hid,
132 : hid_usage_cmp_t match,
133 : unsigned int value,
134 : unsigned int *usage_idx)
135 : {
136 0 : unsigned int i, j, k, cur_idx = 0;
137 : struct hid_report *report;
138 : struct hid_usage *usage;
139 :
140 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
141 0 : list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
142 0 : for (i = 0; i < report->maxfield; i++) {
143 0 : for (j = 0; j < report->field[i]->maxusage; j++) {
144 0 : usage = report->field[i]->usage + j;
145 0 : if (usage->type == EV_KEY || usage->type == 0) {
146 0 : if (match(usage, cur_idx, value)) {
147 0 : if (usage_idx)
148 0 : *usage_idx = cur_idx;
149 : return usage;
150 : }
151 0 : cur_idx++;
152 : }
153 : }
154 : }
155 : }
156 : }
157 : return NULL;
158 : }
159 :
160 0 : static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
161 : const struct input_keymap_entry *ke,
162 : unsigned int *index)
163 : {
164 : struct hid_usage *usage;
165 : unsigned int scancode;
166 :
167 0 : if (ke->flags & INPUT_KEYMAP_BY_INDEX)
168 0 : usage = hidinput_find_key(hid, match_index, ke->index, index);
169 0 : else if (input_scancode_to_scalar(ke, &scancode) == 0)
170 0 : usage = hidinput_find_key(hid, match_scancode, scancode, index);
171 : else
172 : usage = NULL;
173 :
174 0 : return usage;
175 : }
176 :
177 0 : static int hidinput_getkeycode(struct input_dev *dev,
178 : struct input_keymap_entry *ke)
179 : {
180 0 : struct hid_device *hid = input_get_drvdata(dev);
181 : struct hid_usage *usage;
182 : unsigned int scancode, index;
183 :
184 0 : usage = hidinput_locate_usage(hid, ke, &index);
185 0 : if (usage) {
186 0 : ke->keycode = usage->type == EV_KEY ?
187 0 : usage->code : KEY_RESERVED;
188 0 : ke->index = index;
189 0 : scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
190 0 : ke->len = sizeof(scancode);
191 0 : memcpy(ke->scancode, &scancode, sizeof(scancode));
192 0 : return 0;
193 : }
194 :
195 : return -EINVAL;
196 : }
197 :
198 0 : static int hidinput_setkeycode(struct input_dev *dev,
199 : const struct input_keymap_entry *ke,
200 : unsigned int *old_keycode)
201 : {
202 0 : struct hid_device *hid = input_get_drvdata(dev);
203 : struct hid_usage *usage;
204 :
205 0 : usage = hidinput_locate_usage(hid, ke, NULL);
206 0 : if (usage) {
207 0 : *old_keycode = usage->type == EV_KEY ?
208 0 : usage->code : KEY_RESERVED;
209 0 : usage->type = EV_KEY;
210 0 : usage->code = ke->keycode;
211 :
212 0 : clear_bit(*old_keycode, dev->keybit);
213 0 : set_bit(usage->code, dev->keybit);
214 : dbg_hid("Assigned keycode %d to HID usage code %x\n",
215 : usage->code, usage->hid);
216 :
217 : /*
218 : * Set the keybit for the old keycode if the old keycode is used
219 : * by another key
220 : */
221 0 : if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
222 0 : set_bit(*old_keycode, dev->keybit);
223 :
224 : return 0;
225 : }
226 :
227 : return -EINVAL;
228 : }
229 :
230 :
231 : /**
232 : * hidinput_calc_abs_res - calculate an absolute axis resolution
233 : * @field: the HID report field to calculate resolution for
234 : * @code: axis code
235 : *
236 : * The formula is:
237 : * (logical_maximum - logical_minimum)
238 : * resolution = ----------------------------------------------------------
239 : * (physical_maximum - physical_minimum) * 10 ^ unit_exponent
240 : *
241 : * as seen in the HID specification v1.11 6.2.2.7 Global Items.
242 : *
243 : * Only exponent 1 length units are processed. Centimeters and inches are
244 : * converted to millimeters. Degrees are converted to radians.
245 : */
246 0 : __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
247 : {
248 0 : __s32 unit_exponent = field->unit_exponent;
249 0 : __s32 logical_extents = field->logical_maximum -
250 0 : field->logical_minimum;
251 0 : __s32 physical_extents = field->physical_maximum -
252 0 : field->physical_minimum;
253 : __s32 prev;
254 :
255 : /* Check if the extents are sane */
256 0 : if (logical_extents <= 0 || physical_extents <= 0)
257 : return 0;
258 :
259 : /*
260 : * Verify and convert units.
261 : * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
262 : */
263 : switch (code) {
264 : case ABS_X:
265 : case ABS_Y:
266 : case ABS_Z:
267 : case ABS_MT_POSITION_X:
268 : case ABS_MT_POSITION_Y:
269 : case ABS_MT_TOOL_X:
270 : case ABS_MT_TOOL_Y:
271 : case ABS_MT_TOUCH_MAJOR:
272 : case ABS_MT_TOUCH_MINOR:
273 0 : if (field->unit == 0x11) { /* If centimeters */
274 : /* Convert to millimeters */
275 0 : unit_exponent += 1;
276 0 : } else if (field->unit == 0x13) { /* If inches */
277 : /* Convert to millimeters */
278 0 : prev = physical_extents;
279 0 : physical_extents *= 254;
280 0 : if (physical_extents < prev)
281 : return 0;
282 0 : unit_exponent -= 1;
283 : } else {
284 : return 0;
285 : }
286 : break;
287 :
288 : case ABS_RX:
289 : case ABS_RY:
290 : case ABS_RZ:
291 : case ABS_WHEEL:
292 : case ABS_TILT_X:
293 : case ABS_TILT_Y:
294 0 : if (field->unit == 0x14) { /* If degrees */
295 : /* Convert to radians */
296 0 : prev = logical_extents;
297 0 : logical_extents *= 573;
298 0 : if (logical_extents < prev)
299 : return 0;
300 0 : unit_exponent += 1;
301 0 : } else if (field->unit != 0x12) { /* If not radians */
302 : return 0;
303 : }
304 : break;
305 :
306 : default:
307 : return 0;
308 : }
309 :
310 : /* Apply negative unit exponent */
311 0 : for (; unit_exponent < 0; unit_exponent++) {
312 0 : prev = logical_extents;
313 0 : logical_extents *= 10;
314 0 : if (logical_extents < prev)
315 : return 0;
316 : }
317 : /* Apply positive unit exponent */
318 0 : for (; unit_exponent > 0; unit_exponent--) {
319 0 : prev = physical_extents;
320 0 : physical_extents *= 10;
321 0 : if (physical_extents < prev)
322 : return 0;
323 : }
324 :
325 : /* Calculate resolution */
326 0 : return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
327 : }
328 : EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
329 :
330 : #ifdef CONFIG_HID_BATTERY_STRENGTH
331 : static enum power_supply_property hidinput_battery_props[] = {
332 : POWER_SUPPLY_PROP_PRESENT,
333 : POWER_SUPPLY_PROP_ONLINE,
334 : POWER_SUPPLY_PROP_CAPACITY,
335 : POWER_SUPPLY_PROP_MODEL_NAME,
336 : POWER_SUPPLY_PROP_STATUS,
337 : POWER_SUPPLY_PROP_SCOPE,
338 : };
339 :
340 : #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
341 : #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
342 : #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
343 : #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_ELECOM,
362 : USB_DEVICE_ID_ELECOM_BM084),
363 : HID_BATTERY_QUIRK_IGNORE },
364 : { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
365 : USB_DEVICE_ID_SYMBOL_SCANNER_3),
366 : HID_BATTERY_QUIRK_IGNORE },
367 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
368 : USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
369 : HID_BATTERY_QUIRK_IGNORE },
370 : { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
371 : USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
372 : HID_BATTERY_QUIRK_IGNORE },
373 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
374 : HID_BATTERY_QUIRK_IGNORE },
375 : { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
376 : HID_BATTERY_QUIRK_IGNORE },
377 : { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
378 : HID_BATTERY_QUIRK_IGNORE },
379 : { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
380 : HID_BATTERY_QUIRK_AVOID_QUERY },
381 : { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
382 : HID_BATTERY_QUIRK_AVOID_QUERY },
383 : { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
384 : HID_BATTERY_QUIRK_AVOID_QUERY },
385 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
386 : HID_BATTERY_QUIRK_IGNORE },
387 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
388 : HID_BATTERY_QUIRK_IGNORE },
389 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
390 : HID_BATTERY_QUIRK_IGNORE },
391 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
392 : HID_BATTERY_QUIRK_IGNORE },
393 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
394 : HID_BATTERY_QUIRK_IGNORE },
395 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
396 : HID_BATTERY_QUIRK_IGNORE },
397 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
398 : HID_BATTERY_QUIRK_IGNORE },
399 : { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
400 : HID_BATTERY_QUIRK_IGNORE },
401 : {}
402 : };
403 :
404 : static unsigned find_battery_quirk(struct hid_device *hdev)
405 : {
406 : unsigned quirks = 0;
407 : const struct hid_device_id *match;
408 :
409 : match = hid_match_id(hdev, hid_battery_quirks);
410 : if (match != NULL)
411 : quirks = match->driver_data;
412 :
413 : return quirks;
414 : }
415 :
416 : static int hidinput_scale_battery_capacity(struct hid_device *dev,
417 : int value)
418 : {
419 : if (dev->battery_min < dev->battery_max &&
420 : value >= dev->battery_min && value <= dev->battery_max)
421 : value = ((value - dev->battery_min) * 100) /
422 : (dev->battery_max - dev->battery_min);
423 :
424 : return value;
425 : }
426 :
427 : static int hidinput_query_battery_capacity(struct hid_device *dev)
428 : {
429 : u8 *buf;
430 : int ret;
431 :
432 : buf = kmalloc(4, GFP_KERNEL);
433 : if (!buf)
434 : return -ENOMEM;
435 :
436 : ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
437 : dev->battery_report_type, HID_REQ_GET_REPORT);
438 : if (ret < 2) {
439 : kfree(buf);
440 : return -ENODATA;
441 : }
442 :
443 : ret = hidinput_scale_battery_capacity(dev, buf[1]);
444 : kfree(buf);
445 : return ret;
446 : }
447 :
448 : static int hidinput_get_battery_property(struct power_supply *psy,
449 : enum power_supply_property prop,
450 : union power_supply_propval *val)
451 : {
452 : struct hid_device *dev = power_supply_get_drvdata(psy);
453 : int value;
454 : int ret = 0;
455 :
456 : switch (prop) {
457 : case POWER_SUPPLY_PROP_PRESENT:
458 : case POWER_SUPPLY_PROP_ONLINE:
459 : val->intval = 1;
460 : break;
461 :
462 : case POWER_SUPPLY_PROP_CAPACITY:
463 : if (dev->battery_status != HID_BATTERY_REPORTED &&
464 : !dev->battery_avoid_query) {
465 : value = hidinput_query_battery_capacity(dev);
466 : if (value < 0)
467 : return value;
468 : } else {
469 : value = dev->battery_capacity;
470 : }
471 :
472 : val->intval = value;
473 : break;
474 :
475 : case POWER_SUPPLY_PROP_MODEL_NAME:
476 : val->strval = dev->name;
477 : break;
478 :
479 : case POWER_SUPPLY_PROP_STATUS:
480 : if (dev->battery_status != HID_BATTERY_REPORTED &&
481 : !dev->battery_avoid_query) {
482 : value = hidinput_query_battery_capacity(dev);
483 : if (value < 0)
484 : return value;
485 :
486 : dev->battery_capacity = value;
487 : dev->battery_status = HID_BATTERY_QUERIED;
488 : }
489 :
490 : if (dev->battery_status == HID_BATTERY_UNKNOWN)
491 : val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
492 : else
493 : val->intval = dev->battery_charge_status;
494 : break;
495 :
496 : case POWER_SUPPLY_PROP_SCOPE:
497 : val->intval = POWER_SUPPLY_SCOPE_DEVICE;
498 : break;
499 :
500 : default:
501 : ret = -EINVAL;
502 : break;
503 : }
504 :
505 : return ret;
506 : }
507 :
508 : static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
509 : struct hid_field *field, bool is_percentage)
510 : {
511 : struct power_supply_desc *psy_desc;
512 : struct power_supply_config psy_cfg = { .drv_data = dev, };
513 : unsigned quirks;
514 : s32 min, max;
515 : int error;
516 :
517 : if (dev->battery)
518 : return 0; /* already initialized? */
519 :
520 : quirks = find_battery_quirk(dev);
521 :
522 : hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
523 : dev->bus, dev->vendor, dev->product, dev->version, quirks);
524 :
525 : if (quirks & HID_BATTERY_QUIRK_IGNORE)
526 : return 0;
527 :
528 : psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
529 : if (!psy_desc)
530 : return -ENOMEM;
531 :
532 : psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
533 : strlen(dev->uniq) ?
534 : dev->uniq : dev_name(&dev->dev));
535 : if (!psy_desc->name) {
536 : error = -ENOMEM;
537 : goto err_free_mem;
538 : }
539 :
540 : psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
541 : psy_desc->properties = hidinput_battery_props;
542 : psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
543 : psy_desc->use_for_apm = 0;
544 : psy_desc->get_property = hidinput_get_battery_property;
545 :
546 : min = field->logical_minimum;
547 : max = field->logical_maximum;
548 :
549 : if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
550 : min = 0;
551 : max = 100;
552 : }
553 :
554 : if (quirks & HID_BATTERY_QUIRK_FEATURE)
555 : report_type = HID_FEATURE_REPORT;
556 :
557 : dev->battery_min = min;
558 : dev->battery_max = max;
559 : dev->battery_report_type = report_type;
560 : dev->battery_report_id = field->report->id;
561 : dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
562 :
563 : /*
564 : * Stylus is normally not connected to the device and thus we
565 : * can't query the device and get meaningful battery strength.
566 : * We have to wait for the device to report it on its own.
567 : */
568 : dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
569 : field->physical == HID_DG_STYLUS;
570 :
571 : if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
572 : dev->battery_avoid_query = true;
573 :
574 : dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
575 : if (IS_ERR(dev->battery)) {
576 : error = PTR_ERR(dev->battery);
577 : hid_warn(dev, "can't register power supply: %d\n", error);
578 : goto err_free_name;
579 : }
580 :
581 : power_supply_powers(dev->battery, &dev->dev);
582 : return 0;
583 :
584 : err_free_name:
585 : kfree(psy_desc->name);
586 : err_free_mem:
587 : kfree(psy_desc);
588 : dev->battery = NULL;
589 : return error;
590 : }
591 :
592 : static void hidinput_cleanup_battery(struct hid_device *dev)
593 : {
594 : const struct power_supply_desc *psy_desc;
595 :
596 : if (!dev->battery)
597 : return;
598 :
599 : psy_desc = dev->battery->desc;
600 : power_supply_unregister(dev->battery);
601 : kfree(psy_desc->name);
602 : kfree(psy_desc);
603 : dev->battery = NULL;
604 : }
605 :
606 : static void hidinput_update_battery(struct hid_device *dev, int value)
607 : {
608 : int capacity;
609 :
610 : if (!dev->battery)
611 : return;
612 :
613 : if (value == 0 || value < dev->battery_min || value > dev->battery_max)
614 : return;
615 :
616 : capacity = hidinput_scale_battery_capacity(dev, value);
617 :
618 : if (dev->battery_status != HID_BATTERY_REPORTED ||
619 : capacity != dev->battery_capacity ||
620 : ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
621 : dev->battery_capacity = capacity;
622 : dev->battery_status = HID_BATTERY_REPORTED;
623 : dev->battery_ratelimit_time =
624 : ktime_add_ms(ktime_get_coarse(), 30 * 1000);
625 : power_supply_changed(dev->battery);
626 : }
627 : }
628 :
629 : static bool hidinput_set_battery_charge_status(struct hid_device *dev,
630 : unsigned int usage, int value)
631 : {
632 : switch (usage) {
633 : case HID_BAT_CHARGING:
634 : dev->battery_charge_status = value ?
635 : POWER_SUPPLY_STATUS_CHARGING :
636 : POWER_SUPPLY_STATUS_DISCHARGING;
637 : return true;
638 : }
639 :
640 : return false;
641 : }
642 : #else /* !CONFIG_HID_BATTERY_STRENGTH */
643 : static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
644 : struct hid_field *field, bool is_percentage)
645 : {
646 : return 0;
647 : }
648 :
649 : static void hidinput_cleanup_battery(struct hid_device *dev)
650 : {
651 : }
652 :
653 : static void hidinput_update_battery(struct hid_device *dev, int value)
654 : {
655 : }
656 :
657 : static bool hidinput_set_battery_charge_status(struct hid_device *dev,
658 : unsigned int usage, int value)
659 : {
660 : return false;
661 : }
662 : #endif /* CONFIG_HID_BATTERY_STRENGTH */
663 :
664 : static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
665 : unsigned int type, unsigned int usage)
666 : {
667 : struct hid_collection *collection;
668 :
669 0 : collection = &device->collection[field->usage->collection_index];
670 :
671 0 : return collection->type == type && collection->usage == usage;
672 : }
673 :
674 0 : static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
675 : struct hid_usage *usage, unsigned int usage_index)
676 : {
677 0 : struct input_dev *input = hidinput->input;
678 0 : struct hid_device *device = input_get_drvdata(input);
679 0 : const struct usage_priority *usage_priority = NULL;
680 0 : int max = 0, code;
681 0 : unsigned int i = 0;
682 0 : unsigned long *bit = NULL;
683 :
684 0 : field->hidinput = hidinput;
685 :
686 0 : if (field->flags & HID_MAIN_ITEM_CONSTANT)
687 : goto ignore;
688 :
689 : /* Ignore if report count is out of bounds. */
690 0 : if (field->report_count < 1)
691 : goto ignore;
692 :
693 : /* only LED usages are supported in output fields */
694 0 : if (field->report_type == HID_OUTPUT_REPORT &&
695 0 : (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
696 : goto ignore;
697 : }
698 :
699 : /* assign a priority based on the static list declared here */
700 0 : for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
701 0 : if (usage->hid == hidinput_usages_priorities[i].usage) {
702 0 : usage_priority = &hidinput_usages_priorities[i];
703 :
704 0 : field->usages_priorities[usage_index] =
705 0 : (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
706 0 : break;
707 : }
708 : }
709 :
710 : /*
711 : * For slotted devices, we need to also add the slot index
712 : * in the priority.
713 : */
714 0 : if (usage_priority && usage_priority->global)
715 0 : field->usages_priorities[usage_index] |=
716 0 : usage_priority->slot_overwrite;
717 : else
718 0 : field->usages_priorities[usage_index] |=
719 0 : (0xff - field->slot_idx) << 16;
720 :
721 0 : if (device->driver->input_mapping) {
722 0 : int ret = device->driver->input_mapping(device, hidinput, field,
723 : usage, &bit, &max);
724 0 : if (ret > 0)
725 : goto mapped;
726 0 : if (ret < 0)
727 : goto ignore;
728 : }
729 :
730 0 : switch (usage->hid & HID_USAGE_PAGE) {
731 : case HID_UP_UNDEFINED:
732 : goto ignore;
733 :
734 : case HID_UP_KEYBOARD:
735 0 : set_bit(EV_REP, input->evbit);
736 :
737 0 : if ((usage->hid & HID_USAGE) < 256) {
738 0 : if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
739 0 : map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
740 : } else
741 0 : map_key(KEY_UNKNOWN);
742 :
743 : break;
744 :
745 : case HID_UP_BUTTON:
746 0 : code = ((usage->hid - 1) & HID_USAGE);
747 :
748 0 : switch (field->application) {
749 : case HID_GD_MOUSE:
750 0 : case HID_GD_POINTER: code += BTN_MOUSE; break;
751 : case HID_GD_JOYSTICK:
752 0 : if (code <= 0xf)
753 0 : code += BTN_JOYSTICK;
754 : else
755 0 : code += BTN_TRIGGER_HAPPY - 0x10;
756 : break;
757 : case HID_GD_GAMEPAD:
758 0 : if (code <= 0xf)
759 0 : code += BTN_GAMEPAD;
760 : else
761 0 : code += BTN_TRIGGER_HAPPY - 0x10;
762 : break;
763 : case HID_CP_CONSUMER_CONTROL:
764 0 : if (hidinput_field_in_collection(device, field,
765 : HID_COLLECTION_NAMED_ARRAY,
766 : HID_CP_PROGRAMMABLEBUTTONS)) {
767 0 : if (code <= 0x1d)
768 0 : code += KEY_MACRO1;
769 : else
770 0 : code += BTN_TRIGGER_HAPPY - 0x1e;
771 : break;
772 : }
773 : fallthrough;
774 : default:
775 0 : switch (field->physical) {
776 : case HID_GD_MOUSE:
777 0 : case HID_GD_POINTER: code += BTN_MOUSE; break;
778 0 : case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
779 0 : case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
780 0 : default: code += BTN_MISC;
781 : }
782 : }
783 :
784 0 : map_key(code);
785 0 : break;
786 :
787 : case HID_UP_SIMULATION:
788 0 : switch (usage->hid & 0xffff) {
789 0 : case 0xba: map_abs(ABS_RUDDER); break;
790 0 : case 0xbb: map_abs(ABS_THROTTLE); break;
791 0 : case 0xc4: map_abs(ABS_GAS); break;
792 0 : case 0xc5: map_abs(ABS_BRAKE); break;
793 0 : case 0xc8: map_abs(ABS_WHEEL); break;
794 : default: goto ignore;
795 : }
796 : break;
797 :
798 : case HID_UP_GENDESK:
799 0 : if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
800 0 : switch (usage->hid & 0xf) {
801 0 : case 0x1: map_key_clear(KEY_POWER); break;
802 0 : case 0x2: map_key_clear(KEY_SLEEP); break;
803 0 : case 0x3: map_key_clear(KEY_WAKEUP); break;
804 0 : case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
805 0 : case 0x5: map_key_clear(KEY_MENU); break;
806 0 : case 0x6: map_key_clear(KEY_PROG1); break;
807 0 : case 0x7: map_key_clear(KEY_HELP); break;
808 0 : case 0x8: map_key_clear(KEY_EXIT); break;
809 0 : case 0x9: map_key_clear(KEY_SELECT); break;
810 0 : case 0xa: map_key_clear(KEY_RIGHT); break;
811 0 : case 0xb: map_key_clear(KEY_LEFT); break;
812 0 : case 0xc: map_key_clear(KEY_UP); break;
813 0 : case 0xd: map_key_clear(KEY_DOWN); break;
814 0 : case 0xe: map_key_clear(KEY_POWER2); break;
815 0 : case 0xf: map_key_clear(KEY_RESTART); break;
816 : default: goto unknown;
817 : }
818 : break;
819 : }
820 :
821 0 : if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
822 0 : switch (usage->hid & 0xf) {
823 0 : case 0x9: map_key_clear(KEY_MICMUTE); break;
824 : default: goto ignore;
825 : }
826 0 : break;
827 : }
828 :
829 0 : if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
830 0 : switch (usage->hid & 0xf) {
831 0 : case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
832 : default: goto ignore;
833 : }
834 0 : break;
835 : }
836 :
837 : /*
838 : * Some lazy vendors declare 255 usages for System Control,
839 : * leading to the creation of ABS_X|Y axis and too many others.
840 : * It wouldn't be a problem if joydev doesn't consider the
841 : * device as a joystick then.
842 : */
843 0 : if (field->application == HID_GD_SYSTEM_CONTROL)
844 : goto ignore;
845 :
846 0 : if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
847 0 : switch (usage->hid) {
848 0 : case HID_GD_UP: usage->hat_dir = 1; break;
849 0 : case HID_GD_DOWN: usage->hat_dir = 5; break;
850 0 : case HID_GD_RIGHT: usage->hat_dir = 3; break;
851 0 : case HID_GD_LEFT: usage->hat_dir = 7; break;
852 : default: goto unknown;
853 : }
854 0 : if (field->dpad) {
855 0 : map_abs(field->dpad);
856 0 : goto ignore;
857 : }
858 0 : map_abs(ABS_HAT0X);
859 0 : break;
860 : }
861 :
862 0 : switch (usage->hid) {
863 : /* These usage IDs map directly to the usage codes. */
864 : case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
865 : case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
866 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE)
867 0 : map_rel(usage->hid & 0xf);
868 : else
869 0 : map_abs_clear(usage->hid & 0xf);
870 : break;
871 :
872 : case HID_GD_WHEEL:
873 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE) {
874 0 : set_bit(REL_WHEEL, input->relbit);
875 0 : map_rel(REL_WHEEL_HI_RES);
876 : } else {
877 0 : map_abs(usage->hid & 0xf);
878 : }
879 : break;
880 : case HID_GD_SLIDER: case HID_GD_DIAL:
881 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE)
882 0 : map_rel(usage->hid & 0xf);
883 : else
884 0 : map_abs(usage->hid & 0xf);
885 : break;
886 :
887 : case HID_GD_HATSWITCH:
888 0 : usage->hat_min = field->logical_minimum;
889 0 : usage->hat_max = field->logical_maximum;
890 0 : map_abs(ABS_HAT0X);
891 0 : break;
892 :
893 0 : case HID_GD_START: map_key_clear(BTN_START); break;
894 0 : case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
895 :
896 : case HID_GD_RFKILL_BTN:
897 : /* MS wireless radio ctl extension, also check CA */
898 0 : if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
899 0 : map_key_clear(KEY_RFKILL);
900 : /* We need to simulate the btn release */
901 0 : field->flags |= HID_MAIN_ITEM_RELATIVE;
902 0 : break;
903 : }
904 : goto unknown;
905 :
906 : default: goto unknown;
907 : }
908 :
909 : break;
910 :
911 : case HID_UP_LED:
912 0 : switch (usage->hid & 0xffff) { /* HID-Value: */
913 0 : case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
914 0 : case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
915 0 : case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
916 0 : case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
917 0 : case 0x05: map_led (LED_KANA); break; /* "Kana" */
918 0 : case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
919 0 : case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
920 0 : case 0x09: map_led (LED_MUTE); break; /* "Mute" */
921 0 : case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
922 0 : case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
923 0 : case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
924 :
925 : default: goto ignore;
926 : }
927 : break;
928 :
929 : case HID_UP_DIGITIZER:
930 0 : if ((field->application & 0xff) == 0x01) /* Digitizer */
931 0 : __set_bit(INPUT_PROP_POINTER, input->propbit);
932 0 : else if ((field->application & 0xff) == 0x02) /* Pen */
933 0 : __set_bit(INPUT_PROP_DIRECT, input->propbit);
934 :
935 0 : switch (usage->hid & 0xff) {
936 : case 0x00: /* Undefined */
937 : goto ignore;
938 :
939 : case 0x30: /* TipPressure */
940 0 : if (!test_bit(BTN_TOUCH, input->keybit)) {
941 0 : device->quirks |= HID_QUIRK_NOTOUCH;
942 0 : set_bit(EV_KEY, input->evbit);
943 0 : set_bit(BTN_TOUCH, input->keybit);
944 : }
945 0 : map_abs_clear(ABS_PRESSURE);
946 0 : break;
947 :
948 : case 0x32: /* InRange */
949 0 : switch (field->physical) {
950 : case HID_DG_PUCK:
951 0 : map_key(BTN_TOOL_MOUSE);
952 0 : break;
953 : case HID_DG_FINGER:
954 0 : map_key(BTN_TOOL_FINGER);
955 0 : break;
956 : default:
957 : /*
958 : * If the physical is not given,
959 : * rely on the application.
960 : */
961 0 : if (!field->physical) {
962 0 : switch (field->application) {
963 : case HID_DG_TOUCHSCREEN:
964 : case HID_DG_TOUCHPAD:
965 0 : map_key_clear(BTN_TOOL_FINGER);
966 0 : break;
967 : default:
968 0 : map_key_clear(BTN_TOOL_PEN);
969 : }
970 : } else {
971 0 : map_key(BTN_TOOL_PEN);
972 : }
973 : break;
974 : }
975 : break;
976 :
977 : case 0x3b: /* Battery Strength */
978 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
979 0 : usage->type = EV_PWR;
980 0 : return;
981 :
982 : case 0x3c: /* Invert */
983 0 : map_key_clear(BTN_TOOL_RUBBER);
984 0 : break;
985 :
986 : case 0x3d: /* X Tilt */
987 0 : map_abs_clear(ABS_TILT_X);
988 0 : break;
989 :
990 : case 0x3e: /* Y Tilt */
991 0 : map_abs_clear(ABS_TILT_Y);
992 0 : break;
993 :
994 : case 0x33: /* Touch */
995 : case 0x42: /* TipSwitch */
996 : case 0x43: /* TipSwitch2 */
997 0 : device->quirks &= ~HID_QUIRK_NOTOUCH;
998 0 : map_key_clear(BTN_TOUCH);
999 0 : break;
1000 :
1001 : case 0x44: /* BarrelSwitch */
1002 0 : map_key_clear(BTN_STYLUS);
1003 0 : break;
1004 :
1005 : case 0x45: /* ERASER */
1006 : /*
1007 : * This event is reported when eraser tip touches the surface.
1008 : * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
1009 : * tool gets in proximity.
1010 : */
1011 0 : map_key_clear(BTN_TOUCH);
1012 0 : break;
1013 :
1014 : case 0x46: /* TabletPick */
1015 : case 0x5a: /* SecondaryBarrelSwitch */
1016 0 : map_key_clear(BTN_STYLUS2);
1017 0 : break;
1018 :
1019 : case 0x5b: /* TransducerSerialNumber */
1020 : case 0x6e: /* TransducerSerialNumber2 */
1021 0 : map_msc(MSC_SERIAL);
1022 0 : break;
1023 :
1024 : default: goto unknown;
1025 : }
1026 : break;
1027 :
1028 : case HID_UP_TELEPHONY:
1029 0 : switch (usage->hid & HID_USAGE) {
1030 0 : case 0x2f: map_key_clear(KEY_MICMUTE); break;
1031 0 : case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1032 0 : case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1033 0 : case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1034 0 : case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1035 0 : case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1036 0 : case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1037 0 : case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1038 0 : case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1039 0 : case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1040 0 : case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1041 0 : case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1042 0 : case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1043 0 : case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1044 0 : case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1045 0 : case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1046 0 : case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1047 : default: goto ignore;
1048 : }
1049 : break;
1050 :
1051 : case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1052 0 : switch (usage->hid & HID_USAGE) {
1053 : case 0x000: goto ignore;
1054 0 : case 0x030: map_key_clear(KEY_POWER); break;
1055 0 : case 0x031: map_key_clear(KEY_RESTART); break;
1056 0 : case 0x032: map_key_clear(KEY_SLEEP); break;
1057 0 : case 0x034: map_key_clear(KEY_SLEEP); break;
1058 0 : case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1059 0 : case 0x036: map_key_clear(BTN_MISC); break;
1060 :
1061 0 : case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1062 0 : case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1063 0 : case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1064 0 : case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1065 0 : case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1066 0 : case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1067 0 : case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1068 0 : case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1069 0 : case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1070 :
1071 0 : case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1072 0 : case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1073 0 : case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1074 0 : case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1075 0 : case 0x069: map_key_clear(KEY_RED); break;
1076 0 : case 0x06a: map_key_clear(KEY_GREEN); break;
1077 0 : case 0x06b: map_key_clear(KEY_BLUE); break;
1078 0 : case 0x06c: map_key_clear(KEY_YELLOW); break;
1079 0 : case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1080 :
1081 0 : case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1082 0 : case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1083 0 : case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1084 0 : case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1085 0 : case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1086 0 : case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1087 :
1088 0 : case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1089 0 : case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1090 0 : case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1091 :
1092 0 : case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1093 0 : case 0x083: map_key_clear(KEY_LAST); break;
1094 0 : case 0x084: map_key_clear(KEY_ENTER); break;
1095 0 : case 0x088: map_key_clear(KEY_PC); break;
1096 0 : case 0x089: map_key_clear(KEY_TV); break;
1097 0 : case 0x08a: map_key_clear(KEY_WWW); break;
1098 0 : case 0x08b: map_key_clear(KEY_DVD); break;
1099 0 : case 0x08c: map_key_clear(KEY_PHONE); break;
1100 0 : case 0x08d: map_key_clear(KEY_PROGRAM); break;
1101 0 : case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1102 0 : case 0x08f: map_key_clear(KEY_GAMES); break;
1103 0 : case 0x090: map_key_clear(KEY_MEMO); break;
1104 0 : case 0x091: map_key_clear(KEY_CD); break;
1105 0 : case 0x092: map_key_clear(KEY_VCR); break;
1106 0 : case 0x093: map_key_clear(KEY_TUNER); break;
1107 0 : case 0x094: map_key_clear(KEY_EXIT); break;
1108 0 : case 0x095: map_key_clear(KEY_HELP); break;
1109 0 : case 0x096: map_key_clear(KEY_TAPE); break;
1110 0 : case 0x097: map_key_clear(KEY_TV2); break;
1111 0 : case 0x098: map_key_clear(KEY_SAT); break;
1112 0 : case 0x09a: map_key_clear(KEY_PVR); break;
1113 :
1114 0 : case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1115 0 : case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1116 0 : case 0x0a0: map_key_clear(KEY_VCR2); break;
1117 :
1118 0 : case 0x0b0: map_key_clear(KEY_PLAY); break;
1119 0 : case 0x0b1: map_key_clear(KEY_PAUSE); break;
1120 0 : case 0x0b2: map_key_clear(KEY_RECORD); break;
1121 0 : case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1122 0 : case 0x0b4: map_key_clear(KEY_REWIND); break;
1123 0 : case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1124 0 : case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1125 0 : case 0x0b7: map_key_clear(KEY_STOPCD); break;
1126 0 : case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1127 0 : case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1128 0 : case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1129 0 : case 0x0bf: map_key_clear(KEY_SLOW); break;
1130 :
1131 0 : case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1132 0 : case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1133 :
1134 0 : case 0x0d5: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1135 0 : case 0x0d6: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1136 0 : case 0x0d7: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1137 0 : case 0x0d8: map_key_clear(KEY_DICTATE); break;
1138 0 : case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1139 :
1140 0 : case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1141 0 : case 0x0e2: map_key_clear(KEY_MUTE); break;
1142 0 : case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1143 0 : case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1144 0 : case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1145 0 : case 0x0f5: map_key_clear(KEY_SLOW); break;
1146 :
1147 0 : case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1148 0 : case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1149 0 : case 0x183: map_key_clear(KEY_CONFIG); break;
1150 0 : case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1151 0 : case 0x185: map_key_clear(KEY_EDITOR); break;
1152 0 : case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1153 0 : case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1154 0 : case 0x188: map_key_clear(KEY_PRESENTATION); break;
1155 0 : case 0x189: map_key_clear(KEY_DATABASE); break;
1156 0 : case 0x18a: map_key_clear(KEY_MAIL); break;
1157 0 : case 0x18b: map_key_clear(KEY_NEWS); break;
1158 0 : case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1159 0 : case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1160 0 : case 0x18e: map_key_clear(KEY_CALENDAR); break;
1161 0 : case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1162 0 : case 0x190: map_key_clear(KEY_JOURNAL); break;
1163 0 : case 0x191: map_key_clear(KEY_FINANCE); break;
1164 0 : case 0x192: map_key_clear(KEY_CALC); break;
1165 0 : case 0x193: map_key_clear(KEY_PLAYER); break;
1166 0 : case 0x194: map_key_clear(KEY_FILE); break;
1167 0 : case 0x196: map_key_clear(KEY_WWW); break;
1168 0 : case 0x199: map_key_clear(KEY_CHAT); break;
1169 0 : case 0x19c: map_key_clear(KEY_LOGOFF); break;
1170 0 : case 0x19e: map_key_clear(KEY_COFFEE); break;
1171 0 : case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1172 0 : case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1173 0 : case 0x1a3: map_key_clear(KEY_NEXT); break;
1174 0 : case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1175 0 : case 0x1a6: map_key_clear(KEY_HELP); break;
1176 0 : case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1177 0 : case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1178 0 : case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1179 0 : case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1180 0 : case 0x1b4: map_key_clear(KEY_FILE); break;
1181 0 : case 0x1b6: map_key_clear(KEY_IMAGES); break;
1182 0 : case 0x1b7: map_key_clear(KEY_AUDIO); break;
1183 0 : case 0x1b8: map_key_clear(KEY_VIDEO); break;
1184 0 : case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1185 0 : case 0x1bd: map_key_clear(KEY_INFO); break;
1186 0 : case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1187 0 : case 0x201: map_key_clear(KEY_NEW); break;
1188 0 : case 0x202: map_key_clear(KEY_OPEN); break;
1189 0 : case 0x203: map_key_clear(KEY_CLOSE); break;
1190 0 : case 0x204: map_key_clear(KEY_EXIT); break;
1191 0 : case 0x207: map_key_clear(KEY_SAVE); break;
1192 0 : case 0x208: map_key_clear(KEY_PRINT); break;
1193 0 : case 0x209: map_key_clear(KEY_PROPS); break;
1194 0 : case 0x21a: map_key_clear(KEY_UNDO); break;
1195 0 : case 0x21b: map_key_clear(KEY_COPY); break;
1196 0 : case 0x21c: map_key_clear(KEY_CUT); break;
1197 0 : case 0x21d: map_key_clear(KEY_PASTE); break;
1198 0 : case 0x21f: map_key_clear(KEY_FIND); break;
1199 0 : case 0x221: map_key_clear(KEY_SEARCH); break;
1200 0 : case 0x222: map_key_clear(KEY_GOTO); break;
1201 0 : case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1202 0 : case 0x224: map_key_clear(KEY_BACK); break;
1203 0 : case 0x225: map_key_clear(KEY_FORWARD); break;
1204 0 : case 0x226: map_key_clear(KEY_STOP); break;
1205 0 : case 0x227: map_key_clear(KEY_REFRESH); break;
1206 0 : case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1207 0 : case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1208 0 : case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1209 0 : case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1210 0 : case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1211 0 : case 0x233: map_key_clear(KEY_SCROLLUP); break;
1212 0 : case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1213 : case 0x238: /* AC Pan */
1214 0 : set_bit(REL_HWHEEL, input->relbit);
1215 0 : map_rel(REL_HWHEEL_HI_RES);
1216 0 : break;
1217 0 : case 0x23d: map_key_clear(KEY_EDIT); break;
1218 0 : case 0x25f: map_key_clear(KEY_CANCEL); break;
1219 0 : case 0x269: map_key_clear(KEY_INSERT); break;
1220 0 : case 0x26a: map_key_clear(KEY_DELETE); break;
1221 0 : case 0x279: map_key_clear(KEY_REDO); break;
1222 :
1223 0 : case 0x289: map_key_clear(KEY_REPLY); break;
1224 0 : case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1225 0 : case 0x28c: map_key_clear(KEY_SEND); break;
1226 :
1227 0 : case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1228 :
1229 0 : case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1230 :
1231 0 : case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1232 0 : case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1233 0 : case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1234 0 : case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1235 0 : case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1236 0 : case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1237 :
1238 0 : case 0x29f: map_key_clear(KEY_SCALE); break;
1239 :
1240 0 : default: map_key_clear(KEY_UNKNOWN);
1241 : }
1242 : break;
1243 :
1244 : case HID_UP_GENDEVCTRLS:
1245 0 : switch (usage->hid) {
1246 : case HID_DC_BATTERYSTRENGTH:
1247 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1248 0 : usage->type = EV_PWR;
1249 0 : return;
1250 : }
1251 : goto unknown;
1252 :
1253 : case HID_UP_BATTERY:
1254 0 : switch (usage->hid) {
1255 : case HID_BAT_ABSOLUTESTATEOFCHARGE:
1256 0 : hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1257 0 : usage->type = EV_PWR;
1258 0 : return;
1259 : case HID_BAT_CHARGING:
1260 0 : usage->type = EV_PWR;
1261 0 : return;
1262 : }
1263 : goto unknown;
1264 :
1265 : case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1266 0 : set_bit(EV_REP, input->evbit);
1267 0 : switch (usage->hid & HID_USAGE) {
1268 0 : case 0x021: map_key_clear(KEY_PRINT); break;
1269 0 : case 0x070: map_key_clear(KEY_HP); break;
1270 0 : case 0x071: map_key_clear(KEY_CAMERA); break;
1271 0 : case 0x072: map_key_clear(KEY_SOUND); break;
1272 0 : case 0x073: map_key_clear(KEY_QUESTION); break;
1273 0 : case 0x080: map_key_clear(KEY_EMAIL); break;
1274 0 : case 0x081: map_key_clear(KEY_CHAT); break;
1275 0 : case 0x082: map_key_clear(KEY_SEARCH); break;
1276 0 : case 0x083: map_key_clear(KEY_CONNECT); break;
1277 0 : case 0x084: map_key_clear(KEY_FINANCE); break;
1278 0 : case 0x085: map_key_clear(KEY_SPORT); break;
1279 0 : case 0x086: map_key_clear(KEY_SHOP); break;
1280 : default: goto ignore;
1281 : }
1282 : break;
1283 :
1284 : case HID_UP_HPVENDOR2:
1285 0 : set_bit(EV_REP, input->evbit);
1286 0 : switch (usage->hid & HID_USAGE) {
1287 0 : case 0x001: map_key_clear(KEY_MICMUTE); break;
1288 0 : case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1289 0 : case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1290 : default: goto ignore;
1291 : }
1292 : break;
1293 :
1294 : case HID_UP_MSVENDOR:
1295 : goto ignore;
1296 :
1297 : case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1298 0 : set_bit(EV_REP, input->evbit);
1299 : goto ignore;
1300 :
1301 : case HID_UP_LOGIVENDOR:
1302 : /* intentional fallback */
1303 : case HID_UP_LOGIVENDOR2:
1304 : /* intentional fallback */
1305 : case HID_UP_LOGIVENDOR3:
1306 : goto ignore;
1307 :
1308 : case HID_UP_PID:
1309 0 : switch (usage->hid & HID_USAGE) {
1310 0 : case 0xa4: map_key_clear(BTN_DEAD); break;
1311 : default: goto ignore;
1312 : }
1313 0 : break;
1314 :
1315 : default:
1316 : unknown:
1317 0 : if (field->report_size == 1) {
1318 0 : if (field->report->type == HID_OUTPUT_REPORT) {
1319 0 : map_led(LED_MISC);
1320 0 : break;
1321 : }
1322 0 : map_key(BTN_MISC);
1323 0 : break;
1324 : }
1325 0 : if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1326 0 : map_rel(REL_MISC);
1327 0 : break;
1328 : }
1329 0 : map_abs(ABS_MISC);
1330 0 : break;
1331 : }
1332 :
1333 : mapped:
1334 : /* Mapping failed, bail out */
1335 0 : if (!bit)
1336 : return;
1337 :
1338 0 : if (device->driver->input_mapped &&
1339 0 : device->driver->input_mapped(device, hidinput, field, usage,
1340 : &bit, &max) < 0) {
1341 : /*
1342 : * The driver indicated that no further generic handling
1343 : * of the usage is desired.
1344 : */
1345 : return;
1346 : }
1347 :
1348 0 : set_bit(usage->type, input->evbit);
1349 :
1350 : /*
1351 : * This part is *really* controversial:
1352 : * - HID aims at being generic so we should do our best to export
1353 : * all incoming events
1354 : * - HID describes what events are, so there is no reason for ABS_X
1355 : * to be mapped to ABS_Y
1356 : * - HID is using *_MISC+N as a default value, but nothing prevents
1357 : * *_MISC+N to overwrite a legitimate even, which confuses userspace
1358 : * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1359 : * processing)
1360 : *
1361 : * If devices still want to use this (at their own risk), they will
1362 : * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1363 : * the default should be a reliable mapping.
1364 : */
1365 0 : while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1366 0 : if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1367 0 : usage->code = find_next_zero_bit(bit,
1368 0 : max + 1,
1369 0 : usage->code);
1370 : } else {
1371 0 : device->status |= HID_STAT_DUP_DETECTED;
1372 0 : goto ignore;
1373 : }
1374 : }
1375 :
1376 0 : if (usage->code > max)
1377 : goto ignore;
1378 :
1379 0 : if (usage->type == EV_ABS) {
1380 :
1381 0 : int a = field->logical_minimum;
1382 0 : int b = field->logical_maximum;
1383 :
1384 0 : if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1385 0 : a = field->logical_minimum = 0;
1386 0 : b = field->logical_maximum = 255;
1387 : }
1388 :
1389 0 : if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1390 0 : input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1391 0 : else input_set_abs_params(input, usage->code, a, b, 0, 0);
1392 :
1393 0 : input_abs_set_res(input, usage->code,
1394 0 : hidinput_calc_abs_res(field, usage->code));
1395 :
1396 : /* use a larger default input buffer for MT devices */
1397 0 : if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1398 0 : input_set_events_per_packet(input, 60);
1399 : }
1400 :
1401 0 : if (usage->type == EV_ABS &&
1402 0 : (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1403 : int i;
1404 0 : for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1405 0 : input_set_abs_params(input, i, -1, 1, 0, 0);
1406 0 : set_bit(i, input->absbit);
1407 : }
1408 0 : if (usage->hat_dir && !field->dpad)
1409 0 : field->dpad = usage->code;
1410 : }
1411 :
1412 : /* for those devices which produce Consumer volume usage as relative,
1413 : * we emulate pressing volumeup/volumedown appropriate number of times
1414 : * in hidinput_hid_event()
1415 : */
1416 0 : if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1417 0 : (usage->code == ABS_VOLUME)) {
1418 0 : set_bit(KEY_VOLUMEUP, input->keybit);
1419 0 : set_bit(KEY_VOLUMEDOWN, input->keybit);
1420 : }
1421 :
1422 0 : if (usage->type == EV_KEY) {
1423 0 : set_bit(EV_MSC, input->evbit);
1424 0 : set_bit(MSC_SCAN, input->mscbit);
1425 : }
1426 :
1427 : return;
1428 :
1429 : ignore:
1430 0 : usage->type = 0;
1431 0 : usage->code = 0;
1432 : }
1433 :
1434 0 : static void hidinput_handle_scroll(struct hid_usage *usage,
1435 : struct input_dev *input,
1436 : __s32 value)
1437 : {
1438 : int code;
1439 : int hi_res, lo_res;
1440 :
1441 0 : if (value == 0)
1442 : return;
1443 :
1444 0 : if (usage->code == REL_WHEEL_HI_RES)
1445 : code = REL_WHEEL;
1446 : else
1447 0 : code = REL_HWHEEL;
1448 :
1449 : /*
1450 : * Windows reports one wheel click as value 120. Where a high-res
1451 : * scroll wheel is present, a fraction of 120 is reported instead.
1452 : * Our REL_WHEEL_HI_RES axis does the same because all HW must
1453 : * adhere to the 120 expectation.
1454 : */
1455 0 : hi_res = value * 120/usage->resolution_multiplier;
1456 :
1457 0 : usage->wheel_accumulated += hi_res;
1458 0 : lo_res = usage->wheel_accumulated/120;
1459 0 : if (lo_res)
1460 0 : usage->wheel_accumulated -= lo_res * 120;
1461 :
1462 0 : input_event(input, EV_REL, code, lo_res);
1463 0 : input_event(input, EV_REL, usage->code, hi_res);
1464 : }
1465 :
1466 0 : static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1467 : unsigned int tool)
1468 : {
1469 : /* if the given tool is not currently reported, ignore */
1470 0 : if (!test_bit(tool, input->key))
1471 : return;
1472 :
1473 : /*
1474 : * if the given tool was previously set, release it,
1475 : * release any TOUCH and send an EV_SYN
1476 : */
1477 0 : input_event(input, EV_KEY, BTN_TOUCH, 0);
1478 0 : input_event(input, EV_KEY, tool, 0);
1479 0 : input_event(input, EV_SYN, SYN_REPORT, 0);
1480 :
1481 0 : report->tool = 0;
1482 : }
1483 :
1484 0 : static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1485 : unsigned int new_tool)
1486 : {
1487 0 : if (report->tool != new_tool)
1488 0 : hid_report_release_tool(report, input, report->tool);
1489 :
1490 0 : input_event(input, EV_KEY, new_tool, 1);
1491 0 : report->tool = new_tool;
1492 0 : }
1493 :
1494 0 : void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1495 : {
1496 : struct input_dev *input;
1497 0 : struct hid_report *report = field->report;
1498 0 : unsigned *quirks = &hid->quirks;
1499 :
1500 0 : if (!usage->type)
1501 : return;
1502 :
1503 0 : if (usage->type == EV_PWR) {
1504 : bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1505 :
1506 : if (!handled)
1507 : hidinput_update_battery(hid, value);
1508 :
1509 : return;
1510 : }
1511 :
1512 0 : if (!field->hidinput)
1513 : return;
1514 :
1515 0 : input = field->hidinput->input;
1516 :
1517 0 : if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1518 0 : int hat_dir = usage->hat_dir;
1519 0 : if (!hat_dir)
1520 0 : hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1521 0 : if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1522 0 : input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x);
1523 0 : input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1524 0 : return;
1525 : }
1526 :
1527 : /*
1528 : * Ignore out-of-range values as per HID specification,
1529 : * section 5.10 and 6.2.25, when NULL state bit is present.
1530 : * When it's not, clamp the value to match Microsoft's input
1531 : * driver as mentioned in "Required HID usages for digitizers":
1532 : * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1533 : *
1534 : * The logical_minimum < logical_maximum check is done so that we
1535 : * don't unintentionally discard values sent by devices which
1536 : * don't specify logical min and max.
1537 : */
1538 0 : if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1539 0 : field->logical_minimum < field->logical_maximum) {
1540 0 : if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1541 0 : (value < field->logical_minimum ||
1542 : value > field->logical_maximum)) {
1543 : dbg_hid("Ignoring out-of-range value %x\n", value);
1544 : return;
1545 : }
1546 0 : value = clamp(value,
1547 : field->logical_minimum,
1548 : field->logical_maximum);
1549 : }
1550 :
1551 0 : switch (usage->hid) {
1552 : case HID_DG_ERASER:
1553 0 : report->tool_active |= !!value;
1554 :
1555 : /*
1556 : * if eraser is set, we must enforce BTN_TOOL_RUBBER
1557 : * to accommodate for devices not following the spec.
1558 : */
1559 0 : if (value)
1560 0 : hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1561 0 : else if (report->tool != BTN_TOOL_RUBBER)
1562 : /* value is off, tool is not rubber, ignore */
1563 : return;
1564 :
1565 : /* let hid-input set BTN_TOUCH */
1566 : break;
1567 :
1568 : case HID_DG_INVERT:
1569 0 : report->tool_active |= !!value;
1570 :
1571 : /*
1572 : * If invert is set, we store BTN_TOOL_RUBBER.
1573 : */
1574 0 : if (value)
1575 0 : hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1576 0 : else if (!report->tool_active)
1577 : /* tool_active not set means Invert and Eraser are not set */
1578 0 : hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1579 :
1580 : /* no further processing */
1581 : return;
1582 :
1583 : case HID_DG_INRANGE:
1584 0 : report->tool_active |= !!value;
1585 :
1586 0 : if (report->tool_active) {
1587 : /*
1588 : * if tool is not set but is marked as active,
1589 : * assume ours
1590 : */
1591 0 : if (!report->tool)
1592 0 : report->tool = usage->code;
1593 :
1594 : /* drivers may have changed the value behind our back, resend it */
1595 0 : hid_report_set_tool(report, input, report->tool);
1596 : } else {
1597 0 : hid_report_release_tool(report, input, usage->code);
1598 : }
1599 :
1600 : /* reset tool_active for the next event */
1601 0 : report->tool_active = false;
1602 :
1603 : /* no further processing */
1604 0 : return;
1605 :
1606 : case HID_DG_TIPSWITCH:
1607 0 : report->tool_active |= !!value;
1608 :
1609 : /* if tool is set to RUBBER we should ignore the current value */
1610 0 : if (report->tool == BTN_TOOL_RUBBER)
1611 : return;
1612 :
1613 : break;
1614 :
1615 : case HID_DG_TIPPRESSURE:
1616 0 : if (*quirks & HID_QUIRK_NOTOUCH) {
1617 0 : int a = field->logical_minimum;
1618 0 : int b = field->logical_maximum;
1619 :
1620 0 : if (value > a + ((b - a) >> 3)) {
1621 0 : input_event(input, EV_KEY, BTN_TOUCH, 1);
1622 0 : report->tool_active = true;
1623 : }
1624 : }
1625 : break;
1626 :
1627 : case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1628 : dbg_hid("Maximum Effects - %d\n",value);
1629 : return;
1630 :
1631 : case HID_UP_PID | 0x7fUL:
1632 : dbg_hid("PID Pool Report\n");
1633 : return;
1634 : }
1635 :
1636 0 : switch (usage->type) {
1637 : case EV_KEY:
1638 0 : if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1639 : return;
1640 : break;
1641 :
1642 : case EV_REL:
1643 0 : if (usage->code == REL_WHEEL_HI_RES ||
1644 : usage->code == REL_HWHEEL_HI_RES) {
1645 0 : hidinput_handle_scroll(usage, input, value);
1646 0 : return;
1647 : }
1648 : break;
1649 :
1650 : case EV_ABS:
1651 0 : if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1652 0 : usage->code == ABS_VOLUME) {
1653 0 : int count = abs(value);
1654 0 : int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1655 : int i;
1656 :
1657 0 : for (i = 0; i < count; i++) {
1658 0 : input_event(input, EV_KEY, direction, 1);
1659 0 : input_sync(input);
1660 0 : input_event(input, EV_KEY, direction, 0);
1661 0 : input_sync(input);
1662 : }
1663 : return;
1664 :
1665 0 : } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1666 0 : ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1667 0 : value = field->logical_maximum - value;
1668 : break;
1669 : }
1670 :
1671 : /*
1672 : * Ignore reports for absolute data if the data didn't change. This is
1673 : * not only an optimization but also fixes 'dead' key reports. Some
1674 : * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1675 : * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1676 : * can only have one of them physically available. The 'dead' keys
1677 : * report constant 0. As all map to the same keycode, they'd confuse
1678 : * the input layer. If we filter the 'dead' keys on the HID level, we
1679 : * skip the keycode translation and only forward real events.
1680 : */
1681 0 : if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1682 0 : HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1683 0 : (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1684 0 : usage->usage_index < field->maxusage &&
1685 0 : value == field->value[usage->usage_index])
1686 : return;
1687 :
1688 : /* report the usage code as scancode if the key status has changed */
1689 0 : if (usage->type == EV_KEY &&
1690 0 : (!test_bit(usage->code, input->key)) == value)
1691 0 : input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1692 :
1693 0 : input_event(input, usage->type, usage->code, value);
1694 :
1695 0 : if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1696 0 : usage->type == EV_KEY && value) {
1697 0 : input_sync(input);
1698 0 : input_event(input, usage->type, usage->code, 0);
1699 : }
1700 : }
1701 :
1702 0 : void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1703 : {
1704 : struct hid_input *hidinput;
1705 :
1706 0 : if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1707 : return;
1708 :
1709 0 : list_for_each_entry(hidinput, &hid->inputs, list)
1710 0 : input_sync(hidinput->input);
1711 : }
1712 : EXPORT_SYMBOL_GPL(hidinput_report_event);
1713 :
1714 0 : static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1715 : unsigned int code, struct hid_field **field)
1716 : {
1717 : struct hid_report *report;
1718 : int i, j;
1719 :
1720 0 : list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1721 0 : for (i = 0; i < report->maxfield; i++) {
1722 0 : *field = report->field[i];
1723 0 : for (j = 0; j < (*field)->maxusage; j++)
1724 0 : if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1725 : return j;
1726 : }
1727 : }
1728 : return -1;
1729 : }
1730 :
1731 0 : struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1732 : {
1733 : struct hid_report *report;
1734 : struct hid_field *field;
1735 : int i, j;
1736 :
1737 0 : list_for_each_entry(report,
1738 : &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1739 : list) {
1740 0 : for (i = 0; i < report->maxfield; i++) {
1741 0 : field = report->field[i];
1742 0 : for (j = 0; j < field->maxusage; j++)
1743 0 : if (field->usage[j].type == EV_LED)
1744 : return field;
1745 : }
1746 : }
1747 : return NULL;
1748 : }
1749 : EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1750 :
1751 0 : unsigned int hidinput_count_leds(struct hid_device *hid)
1752 : {
1753 : struct hid_report *report;
1754 : struct hid_field *field;
1755 : int i, j;
1756 0 : unsigned int count = 0;
1757 :
1758 0 : list_for_each_entry(report,
1759 : &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1760 : list) {
1761 0 : for (i = 0; i < report->maxfield; i++) {
1762 0 : field = report->field[i];
1763 0 : for (j = 0; j < field->maxusage; j++)
1764 0 : if (field->usage[j].type == EV_LED &&
1765 0 : field->value[j])
1766 0 : count += 1;
1767 : }
1768 : }
1769 0 : return count;
1770 : }
1771 : EXPORT_SYMBOL_GPL(hidinput_count_leds);
1772 :
1773 0 : static void hidinput_led_worker(struct work_struct *work)
1774 : {
1775 0 : struct hid_device *hid = container_of(work, struct hid_device,
1776 : led_work);
1777 : struct hid_field *field;
1778 : struct hid_report *report;
1779 : int ret;
1780 : u32 len;
1781 : __u8 *buf;
1782 :
1783 0 : field = hidinput_get_led_field(hid);
1784 0 : if (!field)
1785 : return;
1786 :
1787 : /*
1788 : * field->report is accessed unlocked regarding HID core. So there might
1789 : * be another incoming SET-LED request from user-space, which changes
1790 : * the LED state while we assemble our outgoing buffer. However, this
1791 : * doesn't matter as hid_output_report() correctly converts it into a
1792 : * boolean value no matter what information is currently set on the LED
1793 : * field (even garbage). So the remote device will always get a valid
1794 : * request.
1795 : * And in case we send a wrong value, a next led worker is spawned
1796 : * for every SET-LED request so the following worker will send the
1797 : * correct value, guaranteed!
1798 : */
1799 :
1800 0 : report = field->report;
1801 :
1802 : /* use custom SET_REPORT request if possible (asynchronous) */
1803 0 : if (hid->ll_driver->request)
1804 0 : return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1805 :
1806 : /* fall back to generic raw-output-report */
1807 0 : len = hid_report_len(report);
1808 0 : buf = hid_alloc_report_buf(report, GFP_KERNEL);
1809 0 : if (!buf)
1810 : return;
1811 :
1812 0 : hid_output_report(report, buf);
1813 : /* synchronous output report */
1814 0 : ret = hid_hw_output_report(hid, buf, len);
1815 0 : if (ret == -ENOSYS)
1816 0 : hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1817 : HID_REQ_SET_REPORT);
1818 0 : kfree(buf);
1819 : }
1820 :
1821 0 : static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1822 : unsigned int code, int value)
1823 : {
1824 0 : struct hid_device *hid = input_get_drvdata(dev);
1825 : struct hid_field *field;
1826 : int offset;
1827 :
1828 0 : if (type == EV_FF)
1829 0 : return input_ff_event(dev, type, code, value);
1830 :
1831 0 : if (type != EV_LED)
1832 : return -1;
1833 :
1834 0 : if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1835 0 : hid_warn(dev, "event field not found\n");
1836 0 : return -1;
1837 : }
1838 :
1839 0 : hid_set_field(field, offset, value);
1840 :
1841 0 : schedule_work(&hid->led_work);
1842 0 : return 0;
1843 : }
1844 :
1845 0 : static int hidinput_open(struct input_dev *dev)
1846 : {
1847 0 : struct hid_device *hid = input_get_drvdata(dev);
1848 :
1849 0 : return hid_hw_open(hid);
1850 : }
1851 :
1852 0 : static void hidinput_close(struct input_dev *dev)
1853 : {
1854 0 : struct hid_device *hid = input_get_drvdata(dev);
1855 :
1856 0 : hid_hw_close(hid);
1857 0 : }
1858 :
1859 0 : static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1860 : struct hid_report *report, bool use_logical_max)
1861 : {
1862 : struct hid_usage *usage;
1863 0 : bool update_needed = false;
1864 0 : bool get_report_completed = false;
1865 : int i, j;
1866 :
1867 0 : if (report->maxfield == 0)
1868 : return false;
1869 :
1870 0 : for (i = 0; i < report->maxfield; i++) {
1871 0 : __s32 value = use_logical_max ?
1872 0 : report->field[i]->logical_maximum :
1873 0 : report->field[i]->logical_minimum;
1874 :
1875 : /* There is no good reason for a Resolution
1876 : * Multiplier to have a count other than 1.
1877 : * Ignore that case.
1878 : */
1879 0 : if (report->field[i]->report_count != 1)
1880 0 : continue;
1881 :
1882 0 : for (j = 0; j < report->field[i]->maxusage; j++) {
1883 0 : usage = &report->field[i]->usage[j];
1884 :
1885 0 : if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1886 0 : continue;
1887 :
1888 : /*
1889 : * If we have more than one feature within this
1890 : * report we need to fill in the bits from the
1891 : * others before we can overwrite the ones for the
1892 : * Resolution Multiplier.
1893 : *
1894 : * But if we're not allowed to read from the device,
1895 : * we just bail. Such a device should not exist
1896 : * anyway.
1897 : */
1898 0 : if (!get_report_completed && report->maxfield > 1) {
1899 0 : if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1900 : return update_needed;
1901 :
1902 0 : hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1903 : hid_hw_wait(hid);
1904 : get_report_completed = true;
1905 : }
1906 :
1907 0 : report->field[i]->value[j] = value;
1908 0 : update_needed = true;
1909 : }
1910 : }
1911 :
1912 : return update_needed;
1913 : }
1914 :
1915 0 : static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1916 : {
1917 : struct hid_report_enum *rep_enum;
1918 : struct hid_report *rep;
1919 : int ret;
1920 :
1921 0 : rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1922 0 : list_for_each_entry(rep, &rep_enum->report_list, list) {
1923 0 : bool update_needed = __hidinput_change_resolution_multipliers(hid,
1924 : rep, true);
1925 :
1926 0 : if (update_needed) {
1927 0 : ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1928 0 : if (ret) {
1929 0 : __hidinput_change_resolution_multipliers(hid,
1930 : rep, false);
1931 0 : return;
1932 : }
1933 : }
1934 : }
1935 :
1936 : /* refresh our structs */
1937 0 : hid_setup_resolution_multiplier(hid);
1938 : }
1939 :
1940 0 : static void report_features(struct hid_device *hid)
1941 : {
1942 0 : struct hid_driver *drv = hid->driver;
1943 : struct hid_report_enum *rep_enum;
1944 : struct hid_report *rep;
1945 : struct hid_usage *usage;
1946 : int i, j;
1947 :
1948 0 : rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1949 0 : list_for_each_entry(rep, &rep_enum->report_list, list)
1950 0 : for (i = 0; i < rep->maxfield; i++) {
1951 : /* Ignore if report count is out of bounds. */
1952 0 : if (rep->field[i]->report_count < 1)
1953 0 : continue;
1954 :
1955 0 : for (j = 0; j < rep->field[i]->maxusage; j++) {
1956 0 : usage = &rep->field[i]->usage[j];
1957 :
1958 : /* Verify if Battery Strength feature is available */
1959 : if (usage->hid == HID_DC_BATTERYSTRENGTH)
1960 : hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1961 : rep->field[i], false);
1962 :
1963 0 : if (drv->feature_mapping)
1964 0 : drv->feature_mapping(hid, rep->field[i], usage);
1965 : }
1966 : }
1967 0 : }
1968 :
1969 0 : static struct hid_input *hidinput_allocate(struct hid_device *hid,
1970 : unsigned int application)
1971 : {
1972 0 : struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1973 0 : struct input_dev *input_dev = input_allocate_device();
1974 0 : const char *suffix = NULL;
1975 : size_t suffix_len, name_len;
1976 :
1977 0 : if (!hidinput || !input_dev)
1978 : goto fail;
1979 :
1980 0 : if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1981 0 : hid->maxapplication > 1) {
1982 0 : switch (application) {
1983 : case HID_GD_KEYBOARD:
1984 0 : suffix = "Keyboard";
1985 0 : break;
1986 : case HID_GD_KEYPAD:
1987 0 : suffix = "Keypad";
1988 0 : break;
1989 : case HID_GD_MOUSE:
1990 0 : suffix = "Mouse";
1991 0 : break;
1992 : case HID_DG_PEN:
1993 : /*
1994 : * yes, there is an issue here:
1995 : * DG_PEN -> "Stylus"
1996 : * DG_STYLUS -> "Pen"
1997 : * But changing this now means users with config snippets
1998 : * will have to change it and the test suite will not be happy.
1999 : */
2000 0 : suffix = "Stylus";
2001 0 : break;
2002 : case HID_DG_STYLUS:
2003 0 : suffix = "Pen";
2004 0 : break;
2005 : case HID_DG_TOUCHSCREEN:
2006 0 : suffix = "Touchscreen";
2007 0 : break;
2008 : case HID_DG_TOUCHPAD:
2009 0 : suffix = "Touchpad";
2010 0 : break;
2011 : case HID_GD_SYSTEM_CONTROL:
2012 0 : suffix = "System Control";
2013 0 : break;
2014 : case HID_CP_CONSUMER_CONTROL:
2015 0 : suffix = "Consumer Control";
2016 0 : break;
2017 : case HID_GD_WIRELESS_RADIO_CTLS:
2018 0 : suffix = "Wireless Radio Control";
2019 0 : break;
2020 : case HID_GD_SYSTEM_MULTIAXIS:
2021 0 : suffix = "System Multi Axis";
2022 0 : break;
2023 : default:
2024 : break;
2025 : }
2026 : }
2027 :
2028 0 : if (suffix) {
2029 0 : name_len = strlen(hid->name);
2030 0 : suffix_len = strlen(suffix);
2031 0 : if ((name_len < suffix_len) ||
2032 0 : strcmp(hid->name + name_len - suffix_len, suffix)) {
2033 0 : hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2034 : hid->name, suffix);
2035 0 : if (!hidinput->name)
2036 : goto fail;
2037 : }
2038 : }
2039 :
2040 0 : input_set_drvdata(input_dev, hid);
2041 0 : input_dev->event = hidinput_input_event;
2042 0 : input_dev->open = hidinput_open;
2043 0 : input_dev->close = hidinput_close;
2044 0 : input_dev->setkeycode = hidinput_setkeycode;
2045 0 : input_dev->getkeycode = hidinput_getkeycode;
2046 :
2047 0 : input_dev->name = hidinput->name ? hidinput->name : hid->name;
2048 0 : input_dev->phys = hid->phys;
2049 0 : input_dev->uniq = hid->uniq;
2050 0 : input_dev->id.bustype = hid->bus;
2051 0 : input_dev->id.vendor = hid->vendor;
2052 0 : input_dev->id.product = hid->product;
2053 0 : input_dev->id.version = hid->version;
2054 0 : input_dev->dev.parent = &hid->dev;
2055 :
2056 0 : hidinput->input = input_dev;
2057 0 : hidinput->application = application;
2058 0 : list_add_tail(&hidinput->list, &hid->inputs);
2059 :
2060 0 : INIT_LIST_HEAD(&hidinput->reports);
2061 :
2062 0 : return hidinput;
2063 :
2064 : fail:
2065 0 : kfree(hidinput);
2066 0 : input_free_device(input_dev);
2067 0 : hid_err(hid, "Out of memory during hid input probe\n");
2068 0 : return NULL;
2069 : }
2070 :
2071 0 : static bool hidinput_has_been_populated(struct hid_input *hidinput)
2072 : {
2073 : int i;
2074 0 : unsigned long r = 0;
2075 :
2076 0 : for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2077 0 : r |= hidinput->input->evbit[i];
2078 :
2079 0 : for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2080 0 : r |= hidinput->input->keybit[i];
2081 :
2082 0 : for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2083 0 : r |= hidinput->input->relbit[i];
2084 :
2085 0 : for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2086 0 : r |= hidinput->input->absbit[i];
2087 :
2088 0 : for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2089 0 : r |= hidinput->input->mscbit[i];
2090 :
2091 0 : for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2092 0 : r |= hidinput->input->ledbit[i];
2093 :
2094 0 : for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2095 0 : r |= hidinput->input->sndbit[i];
2096 :
2097 0 : for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2098 0 : r |= hidinput->input->ffbit[i];
2099 :
2100 0 : for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2101 0 : r |= hidinput->input->swbit[i];
2102 :
2103 0 : return !!r;
2104 : }
2105 :
2106 0 : static void hidinput_cleanup_hidinput(struct hid_device *hid,
2107 : struct hid_input *hidinput)
2108 : {
2109 : struct hid_report *report;
2110 : int i, k;
2111 :
2112 0 : list_del(&hidinput->list);
2113 0 : input_free_device(hidinput->input);
2114 0 : kfree(hidinput->name);
2115 :
2116 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2117 0 : if (k == HID_OUTPUT_REPORT &&
2118 0 : hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2119 0 : continue;
2120 :
2121 0 : list_for_each_entry(report, &hid->report_enum[k].report_list,
2122 : list) {
2123 :
2124 0 : for (i = 0; i < report->maxfield; i++)
2125 0 : if (report->field[i]->hidinput == hidinput)
2126 0 : report->field[i]->hidinput = NULL;
2127 : }
2128 : }
2129 :
2130 0 : kfree(hidinput);
2131 0 : }
2132 :
2133 : static struct hid_input *hidinput_match(struct hid_report *report)
2134 : {
2135 0 : struct hid_device *hid = report->device;
2136 : struct hid_input *hidinput;
2137 :
2138 0 : list_for_each_entry(hidinput, &hid->inputs, list) {
2139 0 : if (hidinput->report &&
2140 0 : hidinput->report->id == report->id)
2141 : return hidinput;
2142 : }
2143 :
2144 : return NULL;
2145 : }
2146 :
2147 : static struct hid_input *hidinput_match_application(struct hid_report *report)
2148 : {
2149 0 : struct hid_device *hid = report->device;
2150 : struct hid_input *hidinput;
2151 :
2152 0 : list_for_each_entry(hidinput, &hid->inputs, list) {
2153 0 : if (hidinput->application == report->application)
2154 : return hidinput;
2155 :
2156 : /*
2157 : * Keep SystemControl and ConsumerControl applications together
2158 : * with the main keyboard, if present.
2159 : */
2160 0 : if ((report->application == HID_GD_SYSTEM_CONTROL ||
2161 0 : report->application == HID_CP_CONSUMER_CONTROL) &&
2162 : hidinput->application == HID_GD_KEYBOARD) {
2163 : return hidinput;
2164 : }
2165 : }
2166 :
2167 : return NULL;
2168 : }
2169 :
2170 0 : static inline void hidinput_configure_usages(struct hid_input *hidinput,
2171 : struct hid_report *report)
2172 : {
2173 : int i, j, k;
2174 0 : int first_field_index = 0;
2175 0 : int slot_collection_index = -1;
2176 0 : int prev_collection_index = -1;
2177 0 : unsigned int slot_idx = 0;
2178 : struct hid_field *field;
2179 :
2180 : /*
2181 : * First tag all the fields that are part of a slot,
2182 : * a slot needs to have one Contact ID in the collection
2183 : */
2184 0 : for (i = 0; i < report->maxfield; i++) {
2185 0 : field = report->field[i];
2186 :
2187 : /* ignore fields without usage */
2188 0 : if (field->maxusage < 1)
2189 0 : continue;
2190 :
2191 : /*
2192 : * janitoring when collection_index changes
2193 : */
2194 0 : if (prev_collection_index != field->usage->collection_index) {
2195 0 : prev_collection_index = field->usage->collection_index;
2196 0 : first_field_index = i;
2197 : }
2198 :
2199 : /*
2200 : * if we already found a Contact ID in the collection,
2201 : * tag and continue to the next.
2202 : */
2203 0 : if (slot_collection_index == field->usage->collection_index) {
2204 0 : field->slot_idx = slot_idx;
2205 0 : continue;
2206 : }
2207 :
2208 : /* check if the current field has Contact ID */
2209 0 : for (j = 0; j < field->maxusage; j++) {
2210 0 : if (field->usage[j].hid == HID_DG_CONTACTID) {
2211 0 : slot_collection_index = field->usage->collection_index;
2212 0 : slot_idx++;
2213 :
2214 : /*
2215 : * mark all previous fields and this one in the
2216 : * current collection to be slotted.
2217 : */
2218 0 : for (k = first_field_index; k <= i; k++)
2219 0 : report->field[k]->slot_idx = slot_idx;
2220 : break;
2221 : }
2222 : }
2223 : }
2224 :
2225 0 : for (i = 0; i < report->maxfield; i++)
2226 0 : for (j = 0; j < report->field[i]->maxusage; j++)
2227 0 : hidinput_configure_usage(hidinput, report->field[i],
2228 0 : report->field[i]->usage + j,
2229 : j);
2230 0 : }
2231 :
2232 : /*
2233 : * Register the input device; print a message.
2234 : * Configure the input layer interface
2235 : * Read all reports and initialize the absolute field values.
2236 : */
2237 :
2238 0 : int hidinput_connect(struct hid_device *hid, unsigned int force)
2239 : {
2240 0 : struct hid_driver *drv = hid->driver;
2241 : struct hid_report *report;
2242 0 : struct hid_input *next, *hidinput = NULL;
2243 : unsigned int application;
2244 : int i, k;
2245 :
2246 0 : INIT_LIST_HEAD(&hid->inputs);
2247 0 : INIT_WORK(&hid->led_work, hidinput_led_worker);
2248 :
2249 0 : hid->status &= ~HID_STAT_DUP_DETECTED;
2250 :
2251 0 : if (!force) {
2252 0 : for (i = 0; i < hid->maxcollection; i++) {
2253 0 : struct hid_collection *col = &hid->collection[i];
2254 0 : if (col->type == HID_COLLECTION_APPLICATION ||
2255 : col->type == HID_COLLECTION_PHYSICAL)
2256 0 : if (IS_INPUT_APPLICATION(col->usage))
2257 : break;
2258 : }
2259 :
2260 0 : if (i == hid->maxcollection)
2261 : return -1;
2262 : }
2263 :
2264 0 : report_features(hid);
2265 :
2266 0 : for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2267 0 : if (k == HID_OUTPUT_REPORT &&
2268 0 : hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2269 0 : continue;
2270 :
2271 0 : list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2272 :
2273 0 : if (!report->maxfield)
2274 0 : continue;
2275 :
2276 0 : application = report->application;
2277 :
2278 : /*
2279 : * Find the previous hidinput report attached
2280 : * to this report id.
2281 : */
2282 0 : if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2283 0 : hidinput = hidinput_match(report);
2284 0 : else if (hid->maxapplication > 1 &&
2285 : (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2286 0 : hidinput = hidinput_match_application(report);
2287 :
2288 0 : if (!hidinput) {
2289 0 : hidinput = hidinput_allocate(hid, application);
2290 0 : if (!hidinput)
2291 : goto out_unwind;
2292 : }
2293 :
2294 0 : hidinput_configure_usages(hidinput, report);
2295 :
2296 0 : if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2297 0 : hidinput->report = report;
2298 :
2299 0 : list_add_tail(&report->hidinput_list,
2300 : &hidinput->reports);
2301 : }
2302 : }
2303 :
2304 0 : hidinput_change_resolution_multipliers(hid);
2305 :
2306 0 : list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2307 0 : if (drv->input_configured &&
2308 0 : drv->input_configured(hid, hidinput))
2309 : goto out_unwind;
2310 :
2311 0 : if (!hidinput_has_been_populated(hidinput)) {
2312 : /* no need to register an input device not populated */
2313 0 : hidinput_cleanup_hidinput(hid, hidinput);
2314 0 : continue;
2315 : }
2316 :
2317 0 : if (input_register_device(hidinput->input))
2318 : goto out_unwind;
2319 0 : hidinput->registered = true;
2320 : }
2321 :
2322 0 : if (list_empty(&hid->inputs)) {
2323 0 : hid_err(hid, "No inputs registered, leaving\n");
2324 0 : goto out_unwind;
2325 : }
2326 :
2327 : if (hid->status & HID_STAT_DUP_DETECTED)
2328 : hid_dbg(hid,
2329 : "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2330 :
2331 : return 0;
2332 :
2333 : out_unwind:
2334 : /* unwind the ones we already registered */
2335 0 : hidinput_disconnect(hid);
2336 :
2337 0 : return -1;
2338 : }
2339 : EXPORT_SYMBOL_GPL(hidinput_connect);
2340 :
2341 0 : void hidinput_disconnect(struct hid_device *hid)
2342 : {
2343 : struct hid_input *hidinput, *next;
2344 :
2345 0 : hidinput_cleanup_battery(hid);
2346 :
2347 0 : list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2348 0 : list_del(&hidinput->list);
2349 0 : if (hidinput->registered)
2350 0 : input_unregister_device(hidinput->input);
2351 : else
2352 0 : input_free_device(hidinput->input);
2353 0 : kfree(hidinput->name);
2354 0 : kfree(hidinput);
2355 : }
2356 :
2357 : /* led_work is spawned by input_dev callbacks, but doesn't access the
2358 : * parent input_dev at all. Once all input devices are removed, we
2359 : * know that led_work will never get restarted, so we can cancel it
2360 : * synchronously and are safe. */
2361 0 : cancel_work_sync(&hid->led_work);
2362 0 : }
2363 : EXPORT_SYMBOL_GPL(hidinput_disconnect);
2364 :
2365 : #ifdef CONFIG_HID_KUNIT_TEST
2366 : #include "hid-input-test.c"
2367 : #endif
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