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	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
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
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
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
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: match_index, value: ke->index, usage_idx: index);
169	else if (input_scancode_to_scalar(ke, scancode: &scancode) == 0)
170	usage = hidinput_find_key(hid, match: match_scancode, value: scancode, usage_idx: index);
171	else
172	usage = NULL;
173
174	return usage;
175	}
176
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: &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
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(nr: *old_keycode, addr: dev->keybit);
213	set_bit(nr: usage->code, addr: 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: match_keycode, value: *old_keycode, NULL))
222	set_bit(nr: *old_keycode, addr: 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	__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
247	{
248	__s32 unit_exponent = field->unit_exponent;
249	__s32 logical_extents = field->logical_maximum -
250	field->logical_minimum;
251	__s32 physical_extents = field->physical_maximum -
252	field->physical_minimum;
253	__s32 prev;
254
255	/* Check if the extents are sane */
256	if (logical_extents <= 0 || physical_extents <= 0)
257	return 0;
258
259	/*
260	* Verify and convert units.
261	* See HID specification v1.11 6.2.2.7 Global Items for unit decoding
262	*/
263	switch (code) {
264	case ABS_X:
265	case ABS_Y:
266	case ABS_Z:
267	case ABS_MT_POSITION_X:
268	case ABS_MT_POSITION_Y:
269	case ABS_MT_TOOL_X:
270	case ABS_MT_TOOL_Y:
271	case ABS_MT_TOUCH_MAJOR:
272	case ABS_MT_TOUCH_MINOR:
273	if (field->unit == 0x11) { /* If centimeters */
274	/* Convert to millimeters */
275	unit_exponent += 1;
276	} else if (field->unit == 0x13) { /* If inches */
277	/* Convert to millimeters */
278	prev = physical_extents;
279	physical_extents *= 254;
280	if (physical_extents < prev)
281	return 0;
282	unit_exponent -= 1;
283	} else {
284	return 0;
285	}
286	break;
287
288	case ABS_RX:
289	case ABS_RY:
290	case ABS_RZ:
291	case ABS_WHEEL:
292	case ABS_TILT_X:
293	case ABS_TILT_Y:
294	if (field->unit == 0x14) { /* If degrees */
295	/* Convert to radians */
296	prev = logical_extents;
297	logical_extents *= 573;
298	if (logical_extents < prev)
299	return 0;
300	unit_exponent += 1;
301	} else if (field->unit != 0x12) { /* If not radians */
302	return 0;
303	}
304	break;
305
306	default:
307	return 0;
308	}
309
310	/* Apply negative unit exponent */
311	for (; unit_exponent < 0; unit_exponent++) {
312	prev = logical_extents;
313	logical_extents *= 10;
314	if (logical_extents < prev)
315	return 0;
316	}
317	/* Apply positive unit exponent */
318	for (; unit_exponent > 0; unit_exponent--) {
319	prev = physical_extents;
320	physical_extents *= 10;
321	if (physical_extents < prev)
322	return 0;
323	}
324
325	/* Calculate resolution */
326	return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
327	}
328	EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
329
330	#ifdef CONFIG_HID_BATTERY_STRENGTH
331	static enum power_supply_property hidinput_battery_props[] = {
332	POWER_SUPPLY_PROP_PRESENT,
333	POWER_SUPPLY_PROP_ONLINE,
334	POWER_SUPPLY_PROP_CAPACITY,
335	POWER_SUPPLY_PROP_MODEL_NAME,
336	POWER_SUPPLY_PROP_STATUS,
337	POWER_SUPPLY_PROP_SCOPE,
338	};
339
340	#define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
341	#define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */
342	#define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */
343	#define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */
344
345	static const struct hid_device_id hid_battery_quirks[] = {
346	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
347	USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
348	HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
349	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
350	USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
351	HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
352	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
353	USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
354	HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
355	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
356	USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
357	HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
358	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
359	USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
360	HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
361	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
362	USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
363	HID_BATTERY_QUIRK_IGNORE },
364	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
365	USB_DEVICE_ID_ELECOM_BM084),
366	HID_BATTERY_QUIRK_IGNORE },
367	{ HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
368	USB_DEVICE_ID_SYMBOL_SCANNER_3),
369	HID_BATTERY_QUIRK_IGNORE },
370	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
371	USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
372	HID_BATTERY_QUIRK_IGNORE },
373	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
374	USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
375	HID_BATTERY_QUIRK_IGNORE },
376	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
377	HID_BATTERY_QUIRK_IGNORE },
378	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_GV301RA_TOUCHSCREEN),
379	HID_BATTERY_QUIRK_IGNORE },
380	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
381	HID_BATTERY_QUIRK_IGNORE },
382	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
383	HID_BATTERY_QUIRK_IGNORE },
384	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
385	HID_BATTERY_QUIRK_AVOID_QUERY },
386	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
387	HID_BATTERY_QUIRK_AVOID_QUERY },
388	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
389	HID_BATTERY_QUIRK_AVOID_QUERY },
390	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
391	HID_BATTERY_QUIRK_IGNORE },
392	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
393	HID_BATTERY_QUIRK_IGNORE },
394	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
395	HID_BATTERY_QUIRK_IGNORE },
396	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
397	HID_BATTERY_QUIRK_IGNORE },
398	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
399	HID_BATTERY_QUIRK_IGNORE },
400	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
401	HID_BATTERY_QUIRK_IGNORE },
402	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
403	HID_BATTERY_QUIRK_IGNORE },
404	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
405	HID_BATTERY_QUIRK_IGNORE },
406	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13T_AW100),
407	HID_BATTERY_QUIRK_IGNORE },
408	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V1),
409	HID_BATTERY_QUIRK_IGNORE },
410	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V2),
411	HID_BATTERY_QUIRK_IGNORE },
412	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15_EU0556NG),
413	HID_BATTERY_QUIRK_IGNORE },
414	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
415	HID_BATTERY_QUIRK_AVOID_QUERY },
416	{}
417	};
418
419	static unsigned find_battery_quirk(struct hid_device *hdev)
420	{
421	unsigned quirks = 0;
422	const struct hid_device_id *match;
423
424	match = hid_match_id(hdev, id: hid_battery_quirks);
425	if (match != NULL)
426	quirks = match->driver_data;
427
428	return quirks;
429	}
430
431	static int hidinput_scale_battery_capacity(struct hid_device *dev,
432	int value)
433	{
434	if (dev->battery_min < dev->battery_max &&
435	value >= dev->battery_min && value <= dev->battery_max)
436	value = ((value - dev->battery_min) * 100) /
437	(dev->battery_max - dev->battery_min);
438
439	return value;
440	}
441
442	static int hidinput_query_battery_capacity(struct hid_device *dev)
443	{
444	u8 *buf;
445	int ret;
446
447	buf = kmalloc(size: 4, GFP_KERNEL);
448	if (!buf)
449	return -ENOMEM;
450
451	ret = hid_hw_raw_request(hdev: dev, reportnum: dev->battery_report_id, buf, len: 4,
452	rtype: dev->battery_report_type, reqtype: HID_REQ_GET_REPORT);
453	if (ret < 2) {
454	kfree(objp: buf);
455	return -ENODATA;
456	}
457
458	ret = hidinput_scale_battery_capacity(dev, value: buf[1]);
459	kfree(objp: buf);
460	return ret;
461	}
462
463	static int hidinput_get_battery_property(struct power_supply *psy,
464	enum power_supply_property prop,
465	union power_supply_propval *val)
466	{
467	struct hid_device *dev = power_supply_get_drvdata(psy);
468	int value;
469	int ret = 0;
470
471	switch (prop) {
472	case POWER_SUPPLY_PROP_PRESENT:
473	case POWER_SUPPLY_PROP_ONLINE:
474	val->intval = 1;
475	break;
476
477	case POWER_SUPPLY_PROP_CAPACITY:
478	if (dev->battery_status != HID_BATTERY_REPORTED &&
479	!dev->battery_avoid_query) {
480	value = hidinput_query_battery_capacity(dev);
481	if (value < 0)
482	return value;
483	} else {
484	value = dev->battery_capacity;
485	}
486
487	val->intval = value;
488	break;
489
490	case POWER_SUPPLY_PROP_MODEL_NAME:
491	val->strval = dev->name;
492	break;
493
494	case POWER_SUPPLY_PROP_STATUS:
495	if (dev->battery_status != HID_BATTERY_REPORTED &&
496	!dev->battery_avoid_query) {
497	value = hidinput_query_battery_capacity(dev);
498	if (value < 0)
499	return value;
500
501	dev->battery_capacity = value;
502	dev->battery_status = HID_BATTERY_QUERIED;
503	}
504
505	if (dev->battery_status == HID_BATTERY_UNKNOWN)
506	val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
507	else
508	val->intval = dev->battery_charge_status;
509	break;
510
511	case POWER_SUPPLY_PROP_SCOPE:
512	val->intval = POWER_SUPPLY_SCOPE_DEVICE;
513	break;
514
515	default:
516	ret = -EINVAL;
517	break;
518	}
519
520	return ret;
521	}
522
523	static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
524	struct hid_field *field, bool is_percentage)
525	{
526	struct power_supply_desc *psy_desc;
527	struct power_supply_config psy_cfg = { .drv_data = dev, };
528	unsigned quirks;
529	s32 min, max;
530	int error;
531
532	if (dev->battery)
533	return 0; /* already initialized? */
534
535	quirks = find_battery_quirk(hdev: dev);
536
537	hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
538	dev->bus, dev->vendor, dev->product, dev->version, quirks);
539
540	if (quirks & HID_BATTERY_QUIRK_IGNORE)
541	return 0;
542
543	psy_desc = kzalloc(size: sizeof(*psy_desc), GFP_KERNEL);
544	if (!psy_desc)
545	return -ENOMEM;
546
547	psy_desc->name = kasprintf(GFP_KERNEL, fmt: "hid-%s-battery",
548	strlen(dev->uniq) ?
549	dev->uniq : dev_name(dev: &dev->dev));
550	if (!psy_desc->name) {
551	error = -ENOMEM;
552	goto err_free_mem;
553	}
554
555	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
556	psy_desc->properties = hidinput_battery_props;
557	psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
558	psy_desc->use_for_apm = 0;
559	psy_desc->get_property = hidinput_get_battery_property;
560
561	min = field->logical_minimum;
562	max = field->logical_maximum;
563
564	if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
565	min = 0;
566	max = 100;
567	}
568
569	if (quirks & HID_BATTERY_QUIRK_FEATURE)
570	report_type = HID_FEATURE_REPORT;
571
572	dev->battery_min = min;
573	dev->battery_max = max;
574	dev->battery_report_type = report_type;
575	dev->battery_report_id = field->report->id;
576	dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
577
578	/*
579	* Stylus is normally not connected to the device and thus we
580	* can't query the device and get meaningful battery strength.
581	* We have to wait for the device to report it on its own.
582	*/
583	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
584	field->physical == HID_DG_STYLUS;
585
586	if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
587	dev->battery_avoid_query = true;
588
589	dev->battery = power_supply_register(parent: &dev->dev, desc: psy_desc, cfg: &psy_cfg);
590	if (IS_ERR(ptr: dev->battery)) {
591	error = PTR_ERR(ptr: dev->battery);
592	hid_warn(dev, "can't register power supply: %d\n", error);
593	goto err_free_name;
594	}
595
596	power_supply_powers(psy: dev->battery, dev: &dev->dev);
597	return 0;
598
599	err_free_name:
600	kfree(objp: psy_desc->name);
601	err_free_mem:
602	kfree(objp: psy_desc);
603	dev->battery = NULL;
604	return error;
605	}
606
607	static void hidinput_cleanup_battery(struct hid_device *dev)
608	{
609	const struct power_supply_desc *psy_desc;
610
611	if (!dev->battery)
612	return;
613
614	psy_desc = dev->battery->desc;
615	power_supply_unregister(psy: dev->battery);
616	kfree(objp: psy_desc->name);
617	kfree(objp: psy_desc);
618	dev->battery = NULL;
619	}
620
621	static void hidinput_update_battery(struct hid_device *dev, int value)
622	{
623	int capacity;
624
625	if (!dev->battery)
626	return;
627
628	if (value == 0 || value < dev->battery_min || value > dev->battery_max)
629	return;
630
631	capacity = hidinput_scale_battery_capacity(dev, value);
632
633	if (dev->battery_status != HID_BATTERY_REPORTED ||
634	capacity != dev->battery_capacity ||
635	ktime_after(cmp1: ktime_get_coarse(), cmp2: dev->battery_ratelimit_time)) {
636	dev->battery_capacity = capacity;
637	dev->battery_status = HID_BATTERY_REPORTED;
638	dev->battery_ratelimit_time =
639	ktime_add_ms(kt: ktime_get_coarse(), msec: 30 * 1000);
640	power_supply_changed(psy: dev->battery);
641	}
642	}
643
644	static bool hidinput_set_battery_charge_status(struct hid_device *dev,
645	unsigned int usage, int value)
646	{
647	switch (usage) {
648	case HID_BAT_CHARGING:
649	dev->battery_charge_status = value ?
650	POWER_SUPPLY_STATUS_CHARGING :
651	POWER_SUPPLY_STATUS_DISCHARGING;
652	return true;
653	}
654
655	return false;
656	}
657	#else /* !CONFIG_HID_BATTERY_STRENGTH */
658	static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
659	struct hid_field *field, bool is_percentage)
660	{
661	return 0;
662	}
663
664	static void hidinput_cleanup_battery(struct hid_device *dev)
665	{
666	}
667
668	static void hidinput_update_battery(struct hid_device *dev, int value)
669	{
670	}
671
672	static bool hidinput_set_battery_charge_status(struct hid_device *dev,
673	unsigned int usage, int value)
674	{
675	return false;
676	}
677	#endif /* CONFIG_HID_BATTERY_STRENGTH */
678
679	static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
680	unsigned int type, unsigned int usage)
681	{
682	struct hid_collection *collection;
683
684	collection = &device->collection[field->usage->collection_index];
685
686	return collection->type == type && collection->usage == usage;
687	}
688
689	static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
690	struct hid_usage *usage, unsigned int usage_index)
691	{
692	struct input_dev *input = hidinput->input;
693	struct hid_device *device = input_get_drvdata(dev: input);
694	const struct usage_priority *usage_priority = NULL;
695	int max = 0, code;
696	unsigned int i = 0;
697	unsigned long *bit = NULL;
698
699	field->hidinput = hidinput;
700
701	if (field->flags & HID_MAIN_ITEM_CONSTANT)
702	goto ignore;
703
704	/* Ignore if report count is out of bounds. */
705	if (field->report_count < 1)
706	goto ignore;
707
708	/* only LED usages are supported in output fields */
709	if (field->report_type == HID_OUTPUT_REPORT &&
710	(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
711	goto ignore;
712	}
713
714	/* assign a priority based on the static list declared here */
715	for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
716	if (usage->hid == hidinput_usages_priorities[i].usage) {
717	usage_priority = &hidinput_usages_priorities[i];
718
719	field->usages_priorities[usage_index] =
720	(ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
721	break;
722	}
723	}
724
725	/*
726	* For slotted devices, we need to also add the slot index
727	* in the priority.
728	*/
729	if (usage_priority && usage_priority->global)
730	field->usages_priorities[usage_index] |=
731	usage_priority->slot_overwrite;
732	else
733	field->usages_priorities[usage_index] |=
734	(0xff - field->slot_idx) << 16;
735
736	if (device->driver->input_mapping) {
737	int ret = device->driver->input_mapping(device, hidinput, field,
738	usage, &bit, &max);
739	if (ret > 0)
740	goto mapped;
741	if (ret < 0)
742	goto ignore;
743	}
744
745	switch (usage->hid & HID_USAGE_PAGE) {
746	case HID_UP_UNDEFINED:
747	goto ignore;
748
749	case HID_UP_KEYBOARD:
750	set_bit(EV_REP, addr: input->evbit);
751
752	if ((usage->hid & HID_USAGE) < 256) {
753	if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
754	map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
755	} else
756	map_key(KEY_UNKNOWN);
757
758	break;
759
760	case HID_UP_BUTTON:
761	code = ((usage->hid - 1) & HID_USAGE);
762
763	switch (field->application) {
764	case HID_GD_MOUSE:
765	case HID_GD_POINTER: code += BTN_MOUSE; break;
766	case HID_GD_JOYSTICK:
767	if (code <= 0xf)
768	code += BTN_JOYSTICK;
769	else
770	code += BTN_TRIGGER_HAPPY - 0x10;
771	break;
772	case HID_GD_GAMEPAD:
773	if (code <= 0xf)
774	code += BTN_GAMEPAD;
775	else
776	code += BTN_TRIGGER_HAPPY - 0x10;
777	break;
778	case HID_CP_CONSUMER_CONTROL:
779	if (hidinput_field_in_collection(device, field,
780	HID_COLLECTION_NAMED_ARRAY,
781	HID_CP_PROGRAMMABLEBUTTONS)) {
782	if (code <= 0x1d)
783	code += KEY_MACRO1;
784	else
785	code += BTN_TRIGGER_HAPPY - 0x1e;
786	break;
787	}
788	fallthrough;
789	default:
790	switch (field->physical) {
791	case HID_GD_MOUSE:
792	case HID_GD_POINTER: code += BTN_MOUSE; break;
793	case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
794	case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break;
795	default: code += BTN_MISC;
796	}
797	}
798
799	map_key(code);
800	break;
801
802	case HID_UP_SIMULATION:
803	switch (usage->hid & 0xffff) {
804	case 0xba: map_abs(ABS_RUDDER); break;
805	case 0xbb: map_abs(ABS_THROTTLE); break;
806	case 0xc4: map_abs(ABS_GAS); break;
807	case 0xc5: map_abs(ABS_BRAKE); break;
808	case 0xc8: map_abs(ABS_WHEEL); break;
809	default: goto ignore;
810	}
811	break;
812
813	case HID_UP_GENDESK:
814	if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */
815	switch (usage->hid & 0xf) {
816	case 0x1: map_key_clear(KEY_POWER); break;
817	case 0x2: map_key_clear(KEY_SLEEP); break;
818	case 0x3: map_key_clear(KEY_WAKEUP); break;
819	case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
820	case 0x5: map_key_clear(KEY_MENU); break;
821	case 0x6: map_key_clear(KEY_PROG1); break;
822	case 0x7: map_key_clear(KEY_HELP); break;
823	case 0x8: map_key_clear(KEY_EXIT); break;
824	case 0x9: map_key_clear(KEY_SELECT); break;
825	case 0xa: map_key_clear(KEY_RIGHT); break;
826	case 0xb: map_key_clear(KEY_LEFT); break;
827	case 0xc: map_key_clear(KEY_UP); break;
828	case 0xd: map_key_clear(KEY_DOWN); break;
829	case 0xe: map_key_clear(KEY_POWER2); break;
830	case 0xf: map_key_clear(KEY_RESTART); break;
831	default: goto unknown;
832	}
833	break;
834	}
835
836	if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */
837	switch (usage->hid & 0xf) {
838	case 0x9: map_key_clear(KEY_MICMUTE); break;
839	default: goto ignore;
840	}
841	break;
842	}
843
844	if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */
845	switch (usage->hid & 0xf) {
846	case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
847	default: goto ignore;
848	}
849	break;
850	}
851
852	/*
853	* Some lazy vendors declare 255 usages for System Control,
854	* leading to the creation of ABS_X|Y axis and too many others.
855	* It wouldn't be a problem if joydev doesn't consider the
856	* device as a joystick then.
857	*/
858	if (field->application == HID_GD_SYSTEM_CONTROL)
859	goto ignore;
860
861	if ((usage->hid & 0xf0) == 0x90) { /* D-pad */
862	switch (usage->hid) {
863	case HID_GD_UP: usage->hat_dir = 1; break;
864	case HID_GD_DOWN: usage->hat_dir = 5; break;
865	case HID_GD_RIGHT: usage->hat_dir = 3; break;
866	case HID_GD_LEFT: usage->hat_dir = 7; break;
867	default: goto unknown;
868	}
869	if (field->dpad) {
870	map_abs(field->dpad);
871	goto ignore;
872	}
873	map_abs(ABS_HAT0X);
874	break;
875	}
876
877	switch (usage->hid) {
878	/* These usage IDs map directly to the usage codes. */
879	case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
880	case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
881	if (field->flags & HID_MAIN_ITEM_RELATIVE)
882	map_rel(usage->hid & 0xf);
883	else
884	map_abs_clear(usage->hid & 0xf);
885	break;
886
887	case HID_GD_WHEEL:
888	if (field->flags & HID_MAIN_ITEM_RELATIVE) {
889	set_bit(REL_WHEEL, addr: input->relbit);
890	map_rel(REL_WHEEL_HI_RES);
891	} else {
892	map_abs(usage->hid & 0xf);
893	}
894	break;
895	case HID_GD_SLIDER: case HID_GD_DIAL:
896	if (field->flags & HID_MAIN_ITEM_RELATIVE)
897	map_rel(usage->hid & 0xf);
898	else
899	map_abs(usage->hid & 0xf);
900	break;
901
902	case HID_GD_HATSWITCH:
903	usage->hat_min = field->logical_minimum;
904	usage->hat_max = field->logical_maximum;
905	map_abs(ABS_HAT0X);
906	break;
907
908	case HID_GD_START: map_key_clear(BTN_START); break;
909	case HID_GD_SELECT: map_key_clear(BTN_SELECT); break;
910
911	case HID_GD_RFKILL_BTN:
912	/* MS wireless radio ctl extension, also check CA */
913	if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
914	map_key_clear(KEY_RFKILL);
915	/* We need to simulate the btn release */
916	field->flags |= HID_MAIN_ITEM_RELATIVE;
917	break;
918	}
919	goto unknown;
920
921	default: goto unknown;
922	}
923
924	break;
925
926	case HID_UP_LED:
927	switch (usage->hid & 0xffff) { /* HID-Value: */
928	case 0x01: map_led (LED_NUML); break; /* "Num Lock" */
929	case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */
930	case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */
931	case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */
932	case 0x05: map_led (LED_KANA); break; /* "Kana" */
933	case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
934	case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
935	case 0x09: map_led (LED_MUTE); break; /* "Mute" */
936	case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
937	case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
938	case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
939
940	default: goto ignore;
941	}
942	break;
943
944	case HID_UP_DIGITIZER:
945	if ((field->application & 0xff) == 0x01) /* Digitizer */
946	__set_bit(INPUT_PROP_POINTER, input->propbit);
947	else if ((field->application & 0xff) == 0x02) /* Pen */
948	__set_bit(INPUT_PROP_DIRECT, input->propbit);
949
950	switch (usage->hid & 0xff) {
951	case 0x00: /* Undefined */
952	goto ignore;
953
954	case 0x30: /* TipPressure */
955	if (!test_bit(BTN_TOUCH, input->keybit)) {
956	device->quirks |= HID_QUIRK_NOTOUCH;
957	set_bit(EV_KEY, addr: input->evbit);
958	set_bit(BTN_TOUCH, addr: input->keybit);
959	}
960	map_abs_clear(ABS_PRESSURE);
961	break;
962
963	case 0x32: /* InRange */
964	switch (field->physical) {
965	case HID_DG_PUCK:
966	map_key(BTN_TOOL_MOUSE);
967	break;
968	case HID_DG_FINGER:
969	map_key(BTN_TOOL_FINGER);
970	break;
971	default:
972	/*
973	* If the physical is not given,
974	* rely on the application.
975	*/
976	if (!field->physical) {
977	switch (field->application) {
978	case HID_DG_TOUCHSCREEN:
979	case HID_DG_TOUCHPAD:
980	map_key_clear(BTN_TOOL_FINGER);
981	break;
982	default:
983	map_key_clear(BTN_TOOL_PEN);
984	}
985	} else {
986	map_key(BTN_TOOL_PEN);
987	}
988	break;
989	}
990	break;
991
992	case 0x3b: /* Battery Strength */
993	hidinput_setup_battery(dev: device, report_type: HID_INPUT_REPORT, field, is_percentage: false);
994	usage->type = EV_PWR;
995	return;
996
997	case 0x3c: /* Invert */
998	device->quirks &= ~HID_QUIRK_NOINVERT;
999	map_key_clear(BTN_TOOL_RUBBER);
1000	break;
1001
1002	case 0x3d: /* X Tilt */
1003	map_abs_clear(ABS_TILT_X);
1004	break;
1005
1006	case 0x3e: /* Y Tilt */
1007	map_abs_clear(ABS_TILT_Y);
1008	break;
1009
1010	case 0x33: /* Touch */
1011	case 0x42: /* TipSwitch */
1012	case 0x43: /* TipSwitch2 */
1013	device->quirks &= ~HID_QUIRK_NOTOUCH;
1014	map_key_clear(BTN_TOUCH);
1015	break;
1016
1017	case 0x44: /* BarrelSwitch */
1018	map_key_clear(BTN_STYLUS);
1019	break;
1020
1021	case 0x45: /* ERASER */
1022	/*
1023	* This event is reported when eraser tip touches the surface.
1024	* Actual eraser (BTN_TOOL_RUBBER) is set and released either
1025	* by Invert if tool reports proximity or by Eraser directly.
1026	*/
1027	if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1028	device->quirks |= HID_QUIRK_NOINVERT;
1029	set_bit(BTN_TOOL_RUBBER, addr: input->keybit);
1030	}
1031	map_key_clear(BTN_TOUCH);
1032	break;
1033
1034	case 0x46: /* TabletPick */
1035	case 0x5a: /* SecondaryBarrelSwitch */
1036	map_key_clear(BTN_STYLUS2);
1037	break;
1038
1039	case 0x5b: /* TransducerSerialNumber */
1040	case 0x6e: /* TransducerSerialNumber2 */
1041	map_msc(MSC_SERIAL);
1042	break;
1043
1044	default: goto unknown;
1045	}
1046	break;
1047
1048	case HID_UP_TELEPHONY:
1049	switch (usage->hid & HID_USAGE) {
1050	case 0x2f: map_key_clear(KEY_MICMUTE); break;
1051	case 0xb0: map_key_clear(KEY_NUMERIC_0); break;
1052	case 0xb1: map_key_clear(KEY_NUMERIC_1); break;
1053	case 0xb2: map_key_clear(KEY_NUMERIC_2); break;
1054	case 0xb3: map_key_clear(KEY_NUMERIC_3); break;
1055	case 0xb4: map_key_clear(KEY_NUMERIC_4); break;
1056	case 0xb5: map_key_clear(KEY_NUMERIC_5); break;
1057	case 0xb6: map_key_clear(KEY_NUMERIC_6); break;
1058	case 0xb7: map_key_clear(KEY_NUMERIC_7); break;
1059	case 0xb8: map_key_clear(KEY_NUMERIC_8); break;
1060	case 0xb9: map_key_clear(KEY_NUMERIC_9); break;
1061	case 0xba: map_key_clear(KEY_NUMERIC_STAR); break;
1062	case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break;
1063	case 0xbc: map_key_clear(KEY_NUMERIC_A); break;
1064	case 0xbd: map_key_clear(KEY_NUMERIC_B); break;
1065	case 0xbe: map_key_clear(KEY_NUMERIC_C); break;
1066	case 0xbf: map_key_clear(KEY_NUMERIC_D); break;
1067	default: goto ignore;
1068	}
1069	break;
1070
1071	case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */
1072	switch (usage->hid & HID_USAGE) {
1073	case 0x000: goto ignore;
1074	case 0x030: map_key_clear(KEY_POWER); break;
1075	case 0x031: map_key_clear(KEY_RESTART); break;
1076	case 0x032: map_key_clear(KEY_SLEEP); break;
1077	case 0x034: map_key_clear(KEY_SLEEP); break;
1078	case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1079	case 0x036: map_key_clear(BTN_MISC); break;
1080
1081	case 0x040: map_key_clear(KEY_MENU); break; /* Menu */
1082	case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */
1083	case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */
1084	case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */
1085	case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */
1086	case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */
1087	case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */
1088	case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */
1089	case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */
1090
1091	case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */
1092	case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */
1093	case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */
1094	case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */
1095	case 0x069: map_key_clear(KEY_RED); break;
1096	case 0x06a: map_key_clear(KEY_GREEN); break;
1097	case 0x06b: map_key_clear(KEY_BLUE); break;
1098	case 0x06c: map_key_clear(KEY_YELLOW); break;
1099	case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break;
1100
1101	case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
1102	case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1103	case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
1104	case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
1105	case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
1106	case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
1107
1108	case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break;
1109	case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break;
1110	case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break;
1111
1112	case 0x079: map_key_clear(KEY_KBDILLUMUP); break;
1113	case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break;
1114	case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break;
1115
1116	case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
1117	case 0x083: map_key_clear(KEY_LAST); break;
1118	case 0x084: map_key_clear(KEY_ENTER); break;
1119	case 0x088: map_key_clear(KEY_PC); break;
1120	case 0x089: map_key_clear(KEY_TV); break;
1121	case 0x08a: map_key_clear(KEY_WWW); break;
1122	case 0x08b: map_key_clear(KEY_DVD); break;
1123	case 0x08c: map_key_clear(KEY_PHONE); break;
1124	case 0x08d: map_key_clear(KEY_PROGRAM); break;
1125	case 0x08e: map_key_clear(KEY_VIDEOPHONE); break;
1126	case 0x08f: map_key_clear(KEY_GAMES); break;
1127	case 0x090: map_key_clear(KEY_MEMO); break;
1128	case 0x091: map_key_clear(KEY_CD); break;
1129	case 0x092: map_key_clear(KEY_VCR); break;
1130	case 0x093: map_key_clear(KEY_TUNER); break;
1131	case 0x094: map_key_clear(KEY_EXIT); break;
1132	case 0x095: map_key_clear(KEY_HELP); break;
1133	case 0x096: map_key_clear(KEY_TAPE); break;
1134	case 0x097: map_key_clear(KEY_TV2); break;
1135	case 0x098: map_key_clear(KEY_SAT); break;
1136	case 0x09a: map_key_clear(KEY_PVR); break;
1137
1138	case 0x09c: map_key_clear(KEY_CHANNELUP); break;
1139	case 0x09d: map_key_clear(KEY_CHANNELDOWN); break;
1140	case 0x0a0: map_key_clear(KEY_VCR2); break;
1141
1142	case 0x0b0: map_key_clear(KEY_PLAY); break;
1143	case 0x0b1: map_key_clear(KEY_PAUSE); break;
1144	case 0x0b2: map_key_clear(KEY_RECORD); break;
1145	case 0x0b3: map_key_clear(KEY_FASTFORWARD); break;
1146	case 0x0b4: map_key_clear(KEY_REWIND); break;
1147	case 0x0b5: map_key_clear(KEY_NEXTSONG); break;
1148	case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break;
1149	case 0x0b7: map_key_clear(KEY_STOPCD); break;
1150	case 0x0b8: map_key_clear(KEY_EJECTCD); break;
1151	case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break;
1152	case 0x0b9: map_key_clear(KEY_SHUFFLE); break;
1153	case 0x0bf: map_key_clear(KEY_SLOW); break;
1154
1155	case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
1156	case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
1157
1158	case 0x0d8: map_key_clear(KEY_DICTATE); break;
1159	case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break;
1160
1161	case 0x0e0: map_abs_clear(ABS_VOLUME); break;
1162	case 0x0e2: map_key_clear(KEY_MUTE); break;
1163	case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
1164	case 0x0e9: map_key_clear(KEY_VOLUMEUP); break;
1165	case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
1166	case 0x0f5: map_key_clear(KEY_SLOW); break;
1167
1168	case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
1169	case 0x182: map_key_clear(KEY_BOOKMARKS); break;
1170	case 0x183: map_key_clear(KEY_CONFIG); break;
1171	case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
1172	case 0x185: map_key_clear(KEY_EDITOR); break;
1173	case 0x186: map_key_clear(KEY_SPREADSHEET); break;
1174	case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break;
1175	case 0x188: map_key_clear(KEY_PRESENTATION); break;
1176	case 0x189: map_key_clear(KEY_DATABASE); break;
1177	case 0x18a: map_key_clear(KEY_MAIL); break;
1178	case 0x18b: map_key_clear(KEY_NEWS); break;
1179	case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
1180	case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
1181	case 0x18e: map_key_clear(KEY_CALENDAR); break;
1182	case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
1183	case 0x190: map_key_clear(KEY_JOURNAL); break;
1184	case 0x191: map_key_clear(KEY_FINANCE); break;
1185	case 0x192: map_key_clear(KEY_CALC); break;
1186	case 0x193: map_key_clear(KEY_PLAYER); break;
1187	case 0x194: map_key_clear(KEY_FILE); break;
1188	case 0x196: map_key_clear(KEY_WWW); break;
1189	case 0x199: map_key_clear(KEY_CHAT); break;
1190	case 0x19c: map_key_clear(KEY_LOGOFF); break;
1191	case 0x19e: map_key_clear(KEY_COFFEE); break;
1192	case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
1193	case 0x1a2: map_key_clear(KEY_APPSELECT); break;
1194	case 0x1a3: map_key_clear(KEY_NEXT); break;
1195	case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
1196	case 0x1a6: map_key_clear(KEY_HELP); break;
1197	case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
1198	case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
1199	case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
1200	case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
1201	case 0x1b4: map_key_clear(KEY_FILE); break;
1202	case 0x1b6: map_key_clear(KEY_IMAGES); break;
1203	case 0x1b7: map_key_clear(KEY_AUDIO); break;
1204	case 0x1b8: map_key_clear(KEY_VIDEO); break;
1205	case 0x1bc: map_key_clear(KEY_MESSENGER); break;
1206	case 0x1bd: map_key_clear(KEY_INFO); break;
1207	case 0x1cb: map_key_clear(KEY_ASSISTANT); break;
1208	case 0x201: map_key_clear(KEY_NEW); break;
1209	case 0x202: map_key_clear(KEY_OPEN); break;
1210	case 0x203: map_key_clear(KEY_CLOSE); break;
1211	case 0x204: map_key_clear(KEY_EXIT); break;
1212	case 0x207: map_key_clear(KEY_SAVE); break;
1213	case 0x208: map_key_clear(KEY_PRINT); break;
1214	case 0x209: map_key_clear(KEY_PROPS); break;
1215	case 0x21a: map_key_clear(KEY_UNDO); break;
1216	case 0x21b: map_key_clear(KEY_COPY); break;
1217	case 0x21c: map_key_clear(KEY_CUT); break;
1218	case 0x21d: map_key_clear(KEY_PASTE); break;
1219	case 0x21f: map_key_clear(KEY_FIND); break;
1220	case 0x221: map_key_clear(KEY_SEARCH); break;
1221	case 0x222: map_key_clear(KEY_GOTO); break;
1222	case 0x223: map_key_clear(KEY_HOMEPAGE); break;
1223	case 0x224: map_key_clear(KEY_BACK); break;
1224	case 0x225: map_key_clear(KEY_FORWARD); break;
1225	case 0x226: map_key_clear(KEY_STOP); break;
1226	case 0x227: map_key_clear(KEY_REFRESH); break;
1227	case 0x22a: map_key_clear(KEY_BOOKMARKS); break;
1228	case 0x22d: map_key_clear(KEY_ZOOMIN); break;
1229	case 0x22e: map_key_clear(KEY_ZOOMOUT); break;
1230	case 0x22f: map_key_clear(KEY_ZOOMRESET); break;
1231	case 0x232: map_key_clear(KEY_FULL_SCREEN); break;
1232	case 0x233: map_key_clear(KEY_SCROLLUP); break;
1233	case 0x234: map_key_clear(KEY_SCROLLDOWN); break;
1234	case 0x238: /* AC Pan */
1235	set_bit(REL_HWHEEL, addr: input->relbit);
1236	map_rel(REL_HWHEEL_HI_RES);
1237	break;
1238	case 0x23d: map_key_clear(KEY_EDIT); break;
1239	case 0x25f: map_key_clear(KEY_CANCEL); break;
1240	case 0x269: map_key_clear(KEY_INSERT); break;
1241	case 0x26a: map_key_clear(KEY_DELETE); break;
1242	case 0x279: map_key_clear(KEY_REDO); break;
1243
1244	case 0x289: map_key_clear(KEY_REPLY); break;
1245	case 0x28b: map_key_clear(KEY_FORWARDMAIL); break;
1246	case 0x28c: map_key_clear(KEY_SEND); break;
1247
1248	case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1249
1250	case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break;
1251
1252	case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break;
1253	case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break;
1254	case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break;
1255	case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break;
1256	case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break;
1257	case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break;
1258
1259	case 0x29f: map_key_clear(KEY_SCALE); break;
1260
1261	default: map_key_clear(KEY_UNKNOWN);
1262	}
1263	break;
1264
1265	case HID_UP_GENDEVCTRLS:
1266	switch (usage->hid) {
1267	case HID_DC_BATTERYSTRENGTH:
1268	hidinput_setup_battery(dev: device, report_type: HID_INPUT_REPORT, field, is_percentage: false);
1269	usage->type = EV_PWR;
1270	return;
1271	}
1272	goto unknown;
1273
1274	case HID_UP_BATTERY:
1275	switch (usage->hid) {
1276	case HID_BAT_ABSOLUTESTATEOFCHARGE:
1277	hidinput_setup_battery(dev: device, report_type: HID_INPUT_REPORT, field, is_percentage: true);
1278	usage->type = EV_PWR;
1279	return;
1280	case HID_BAT_CHARGING:
1281	usage->type = EV_PWR;
1282	return;
1283	}
1284	goto unknown;
1285	case HID_UP_CAMERA:
1286	switch (usage->hid & HID_USAGE) {
1287	case 0x020:
1288	map_key_clear(KEY_CAMERA_FOCUS); break;
1289	case 0x021:
1290	map_key_clear(KEY_CAMERA); break;
1291	default:
1292	goto ignore;
1293	}
1294	break;
1295
1296	case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
1297	set_bit(EV_REP, addr: input->evbit);
1298	switch (usage->hid & HID_USAGE) {
1299	case 0x021: map_key_clear(KEY_PRINT); break;
1300	case 0x070: map_key_clear(KEY_HP); break;
1301	case 0x071: map_key_clear(KEY_CAMERA); break;
1302	case 0x072: map_key_clear(KEY_SOUND); break;
1303	case 0x073: map_key_clear(KEY_QUESTION); break;
1304	case 0x080: map_key_clear(KEY_EMAIL); break;
1305	case 0x081: map_key_clear(KEY_CHAT); break;
1306	case 0x082: map_key_clear(KEY_SEARCH); break;
1307	case 0x083: map_key_clear(KEY_CONNECT); break;
1308	case 0x084: map_key_clear(KEY_FINANCE); break;
1309	case 0x085: map_key_clear(KEY_SPORT); break;
1310	case 0x086: map_key_clear(KEY_SHOP); break;
1311	default: goto ignore;
1312	}
1313	break;
1314
1315	case HID_UP_HPVENDOR2:
1316	set_bit(EV_REP, addr: input->evbit);
1317	switch (usage->hid & HID_USAGE) {
1318	case 0x001: map_key_clear(KEY_MICMUTE); break;
1319	case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break;
1320	case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break;
1321	default: goto ignore;
1322	}
1323	break;
1324
1325	case HID_UP_MSVENDOR:
1326	goto ignore;
1327
1328	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1329	set_bit(EV_REP, addr: input->evbit);
1330	goto ignore;
1331
1332	case HID_UP_LOGIVENDOR:
1333	/* intentional fallback */
1334	case HID_UP_LOGIVENDOR2:
1335	/* intentional fallback */
1336	case HID_UP_LOGIVENDOR3:
1337	goto ignore;
1338
1339	case HID_UP_PID:
1340	switch (usage->hid & HID_USAGE) {
1341	case 0xa4: map_key_clear(BTN_DEAD); break;
1342	default: goto ignore;
1343	}
1344	break;
1345
1346	default:
1347	unknown:
1348	if (field->report_size == 1) {
1349	if (field->report->type == HID_OUTPUT_REPORT) {
1350	map_led(LED_MISC);
1351	break;
1352	}
1353	map_key(BTN_MISC);
1354	break;
1355	}
1356	if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1357	map_rel(REL_MISC);
1358	break;
1359	}
1360	map_abs(ABS_MISC);
1361	break;
1362	}
1363
1364	mapped:
1365	/* Mapping failed, bail out */
1366	if (!bit)
1367	return;
1368
1369	if (device->driver->input_mapped &&
1370	device->driver->input_mapped(device, hidinput, field, usage,
1371	&bit, &max) < 0) {
1372	/*
1373	* The driver indicated that no further generic handling
1374	* of the usage is desired.
1375	*/
1376	return;
1377	}
1378
1379	set_bit(nr: usage->type, addr: input->evbit);
1380
1381	/*
1382	* This part is *really* controversial:
1383	* - HID aims at being generic so we should do our best to export
1384	* all incoming events
1385	* - HID describes what events are, so there is no reason for ABS_X
1386	* to be mapped to ABS_Y
1387	* - HID is using *_MISC+N as a default value, but nothing prevents
1388	* *_MISC+N to overwrite a legitimate even, which confuses userspace
1389	* (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1390	* processing)
1391	*
1392	* If devices still want to use this (at their own risk), they will
1393	* have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1394	* the default should be a reliable mapping.
1395	*/
1396	while (usage->code <= max && test_and_set_bit(nr: usage->code, addr: bit)) {
1397	if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1398	usage->code = find_next_zero_bit(addr: bit,
1399	size: max + 1,
1400	offset: usage->code);
1401	} else {
1402	device->status |= HID_STAT_DUP_DETECTED;
1403	goto ignore;
1404	}
1405	}
1406
1407	if (usage->code > max)
1408	goto ignore;
1409
1410	if (usage->type == EV_ABS) {
1411
1412	int a = field->logical_minimum;
1413	int b = field->logical_maximum;
1414
1415	if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1416	a = field->logical_minimum = 0;
1417	b = field->logical_maximum = 255;
1418	}
1419
1420	if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1421	input_set_abs_params(dev: input, axis: usage->code, min: a, max: b, fuzz: (b - a) >> 8, flat: (b - a) >> 4);
1422	else input_set_abs_params(dev: input, axis: usage->code, min: a, max: b, fuzz: 0, flat: 0);
1423
1424	input_abs_set_res(dev: input, axis: usage->code,
1425	val: hidinput_calc_abs_res(field, usage->code));
1426
1427	/* use a larger default input buffer for MT devices */
1428	if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1429	input_set_events_per_packet(dev: input, n_events: 60);
1430	}
1431
1432	if (usage->type == EV_ABS &&
1433	(usage->hat_min < usage->hat_max || usage->hat_dir)) {
1434	int i;
1435	for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1436	input_set_abs_params(dev: input, axis: i, min: -1, max: 1, fuzz: 0, flat: 0);
1437	set_bit(nr: i, addr: input->absbit);
1438	}
1439	if (usage->hat_dir && !field->dpad)
1440	field->dpad = usage->code;
1441	}
1442
1443	/* for those devices which produce Consumer volume usage as relative,
1444	* we emulate pressing volumeup/volumedown appropriate number of times
1445	* in hidinput_hid_event()
1446	*/
1447	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1448	(usage->code == ABS_VOLUME)) {
1449	set_bit(KEY_VOLUMEUP, addr: input->keybit);
1450	set_bit(KEY_VOLUMEDOWN, addr: input->keybit);
1451	}
1452
1453	if (usage->type == EV_KEY) {
1454	set_bit(EV_MSC, addr: input->evbit);
1455	set_bit(MSC_SCAN, addr: input->mscbit);
1456	}
1457
1458	return;
1459
1460	ignore:
1461	usage->type = 0;
1462	usage->code = 0;
1463	}
1464
1465	static void hidinput_handle_scroll(struct hid_usage *usage,
1466	struct input_dev *input,
1467	__s32 value)
1468	{
1469	int code;
1470	int hi_res, lo_res;
1471
1472	if (value == 0)
1473	return;
1474
1475	if (usage->code == REL_WHEEL_HI_RES)
1476	code = REL_WHEEL;
1477	else
1478	code = REL_HWHEEL;
1479
1480	/*
1481	* Windows reports one wheel click as value 120. Where a high-res
1482	* scroll wheel is present, a fraction of 120 is reported instead.
1483	* Our REL_WHEEL_HI_RES axis does the same because all HW must
1484	* adhere to the 120 expectation.
1485	*/
1486	hi_res = value * 120/usage->resolution_multiplier;
1487
1488	usage->wheel_accumulated += hi_res;
1489	lo_res = usage->wheel_accumulated/120;
1490	if (lo_res)
1491	usage->wheel_accumulated -= lo_res * 120;
1492
1493	input_event(dev: input, EV_REL, code, value: lo_res);
1494	input_event(dev: input, EV_REL, code: usage->code, value: hi_res);
1495	}
1496
1497	static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1498	unsigned int tool)
1499	{
1500	/* if the given tool is not currently reported, ignore */
1501	if (!test_bit(tool, input->key))
1502	return;
1503
1504	/*
1505	* if the given tool was previously set, release it,
1506	* release any TOUCH and send an EV_SYN
1507	*/
1508	input_event(dev: input, EV_KEY, BTN_TOUCH, value: 0);
1509	input_event(dev: input, EV_KEY, code: tool, value: 0);
1510	input_event(dev: input, EV_SYN, SYN_REPORT, value: 0);
1511
1512	report->tool = 0;
1513	}
1514
1515	static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1516	unsigned int new_tool)
1517	{
1518	if (report->tool != new_tool)
1519	hid_report_release_tool(report, input, tool: report->tool);
1520
1521	input_event(dev: input, EV_KEY, code: new_tool, value: 1);
1522	report->tool = new_tool;
1523	}
1524
1525	void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1526	{
1527	struct input_dev *input;
1528	struct hid_report *report = field->report;
1529	unsigned *quirks = &hid->quirks;
1530
1531	if (!usage->type)
1532	return;
1533
1534	if (usage->type == EV_PWR) {
1535	bool handled = hidinput_set_battery_charge_status(dev: hid, usage: usage->hid, value);
1536
1537	if (!handled)
1538	hidinput_update_battery(dev: hid, value);
1539
1540	return;
1541	}
1542
1543	if (!field->hidinput)
1544	return;
1545
1546	input = field->hidinput->input;
1547
1548	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1549	int hat_dir = usage->hat_dir;
1550	if (!hat_dir)
1551	hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1552	if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1553	input_event(dev: input, type: usage->type, code: usage->code , value: hid_hat_to_axis[hat_dir].x);
1554	input_event(dev: input, type: usage->type, code: usage->code + 1, value: hid_hat_to_axis[hat_dir].y);
1555	return;
1556	}
1557
1558	/*
1559	* Ignore out-of-range values as per HID specification,
1560	* section 5.10 and 6.2.25, when NULL state bit is present.
1561	* When it's not, clamp the value to match Microsoft's input
1562	* driver as mentioned in "Required HID usages for digitizers":
1563	* https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1564	*
1565	* The logical_minimum < logical_maximum check is done so that we
1566	* don't unintentionally discard values sent by devices which
1567	* don't specify logical min and max.
1568	*/
1569	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1570	field->logical_minimum < field->logical_maximum) {
1571	if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1572	(value < field->logical_minimum ||
1573	value > field->logical_maximum)) {
1574	dbg_hid("Ignoring out-of-range value %x\n", value);
1575	return;
1576	}
1577	value = clamp(value,
1578	field->logical_minimum,
1579	field->logical_maximum);
1580	}
1581
1582	switch (usage->hid) {
1583	case HID_DG_ERASER:
1584	report->tool_active |= !!value;
1585
1586	/*
1587	* if eraser is set, we must enforce BTN_TOOL_RUBBER
1588	* to accommodate for devices not following the spec.
1589	*/
1590	if (value)
1591	hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1592	else if (report->tool != BTN_TOOL_RUBBER)
1593	/* value is off, tool is not rubber, ignore */
1594	return;
1595	else if (*quirks & HID_QUIRK_NOINVERT &&
1596	!test_bit(BTN_TOUCH, input->key)) {
1597	/*
1598	* There is no invert to release the tool, let hid_input
1599	* send BTN_TOUCH with scancode and release the tool after.
1600	*/
1601	hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1602	return;
1603	}
1604
1605	/* let hid-input set BTN_TOUCH */
1606	break;
1607
1608	case HID_DG_INVERT:
1609	report->tool_active |= !!value;
1610
1611	/*
1612	* If invert is set, we store BTN_TOOL_RUBBER.
1613	*/
1614	if (value)
1615	hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1616	else if (!report->tool_active)
1617	/* tool_active not set means Invert and Eraser are not set */
1618	hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1619
1620	/* no further processing */
1621	return;
1622
1623	case HID_DG_INRANGE:
1624	report->tool_active |= !!value;
1625
1626	if (report->tool_active) {
1627	/*
1628	* if tool is not set but is marked as active,
1629	* assume ours
1630	*/
1631	if (!report->tool)
1632	report->tool = usage->code;
1633
1634	/* drivers may have changed the value behind our back, resend it */
1635	hid_report_set_tool(report, input, new_tool: report->tool);
1636	} else {
1637	hid_report_release_tool(report, input, tool: usage->code);
1638	}
1639
1640	/* reset tool_active for the next event */
1641	report->tool_active = false;
1642
1643	/* no further processing */
1644	return;
1645
1646	case HID_DG_TIPSWITCH:
1647	report->tool_active |= !!value;
1648
1649	/* if tool is set to RUBBER we should ignore the current value */
1650	if (report->tool == BTN_TOOL_RUBBER)
1651	return;
1652
1653	break;
1654
1655	case HID_DG_TIPPRESSURE:
1656	if (*quirks & HID_QUIRK_NOTOUCH) {
1657	int a = field->logical_minimum;
1658	int b = field->logical_maximum;
1659
1660	if (value > a + ((b - a) >> 3)) {
1661	input_event(dev: input, EV_KEY, BTN_TOUCH, value: 1);
1662	report->tool_active = true;
1663	}
1664	}
1665	break;
1666
1667	case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1668	dbg_hid("Maximum Effects - %d\n",value);
1669	return;
1670
1671	case HID_UP_PID | 0x7fUL:
1672	dbg_hid("PID Pool Report\n");
1673	return;
1674	}
1675
1676	switch (usage->type) {
1677	case EV_KEY:
1678	if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1679	return;
1680	break;
1681
1682	case EV_REL:
1683	if (usage->code == REL_WHEEL_HI_RES ||
1684	usage->code == REL_HWHEEL_HI_RES) {
1685	hidinput_handle_scroll(usage, input, value);
1686	return;
1687	}
1688	break;
1689
1690	case EV_ABS:
1691	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1692	usage->code == ABS_VOLUME) {
1693	int count = abs(value);
1694	int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1695	int i;
1696
1697	for (i = 0; i < count; i++) {
1698	input_event(dev: input, EV_KEY, code: direction, value: 1);
1699	input_sync(dev: input);
1700	input_event(dev: input, EV_KEY, code: direction, value: 0);
1701	input_sync(dev: input);
1702	}
1703	return;
1704
1705	} else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1706	((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1707	value = field->logical_maximum - value;
1708	break;
1709	}
1710
1711	/*
1712	* Ignore reports for absolute data if the data didn't change. This is
1713	* not only an optimization but also fixes 'dead' key reports. Some
1714	* RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1715	* 0x31 and 0x32) report multiple keys, even though a localized keyboard
1716	* can only have one of them physically available. The 'dead' keys
1717	* report constant 0. As all map to the same keycode, they'd confuse
1718	* the input layer. If we filter the 'dead' keys on the HID level, we
1719	* skip the keycode translation and only forward real events.
1720	*/
1721	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1722	HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1723	(field->flags & HID_MAIN_ITEM_VARIABLE) &&
1724	usage->usage_index < field->maxusage &&
1725	value == field->value[usage->usage_index])
1726	return;
1727
1728	/* report the usage code as scancode if the key status has changed */
1729	if (usage->type == EV_KEY &&
1730	(!test_bit(usage->code, input->key)) == value)
1731	input_event(dev: input, EV_MSC, MSC_SCAN, value: usage->hid);
1732
1733	input_event(dev: input, type: usage->type, code: usage->code, value);
1734
1735	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1736	usage->type == EV_KEY && value) {
1737	input_sync(dev: input);
1738	input_event(dev: input, type: usage->type, code: usage->code, value: 0);
1739	}
1740	}
1741
1742	void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1743	{
1744	struct hid_input *hidinput;
1745
1746	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1747	return;
1748
1749	list_for_each_entry(hidinput, &hid->inputs, list)
1750	input_sync(dev: hidinput->input);
1751	}
1752	EXPORT_SYMBOL_GPL(hidinput_report_event);
1753
1754	static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1755	unsigned int code, struct hid_field **field)
1756	{
1757	struct hid_report *report;
1758	int i, j;
1759
1760	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1761	for (i = 0; i < report->maxfield; i++) {
1762	*field = report->field[i];
1763	for (j = 0; j < (*field)->maxusage; j++)
1764	if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1765	return j;
1766	}
1767	}
1768	return -1;
1769	}
1770
1771	struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1772	{
1773	struct hid_report *report;
1774	struct hid_field *field;
1775	int i, j;
1776
1777	list_for_each_entry(report,
1778	&hid->report_enum[HID_OUTPUT_REPORT].report_list,
1779	list) {
1780	for (i = 0; i < report->maxfield; i++) {
1781	field = report->field[i];
1782	for (j = 0; j < field->maxusage; j++)
1783	if (field->usage[j].type == EV_LED)
1784	return field;
1785	}
1786	}
1787	return NULL;
1788	}
1789	EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1790
1791	unsigned int hidinput_count_leds(struct hid_device *hid)
1792	{
1793	struct hid_report *report;
1794	struct hid_field *field;
1795	int i, j;
1796	unsigned int count = 0;
1797
1798	list_for_each_entry(report,
1799	&hid->report_enum[HID_OUTPUT_REPORT].report_list,
1800	list) {
1801	for (i = 0; i < report->maxfield; i++) {
1802	field = report->field[i];
1803	for (j = 0; j < field->maxusage; j++)
1804	if (field->usage[j].type == EV_LED &&
1805	field->value[j])
1806	count += 1;
1807	}
1808	}
1809	return count;
1810	}
1811	EXPORT_SYMBOL_GPL(hidinput_count_leds);
1812
1813	static void hidinput_led_worker(struct work_struct *work)
1814	{
1815	struct hid_device *hid = container_of(work, struct hid_device,
1816	led_work);
1817	struct hid_field *field;
1818	struct hid_report *report;
1819	int ret;
1820	u32 len;
1821	__u8 *buf;
1822
1823	field = hidinput_get_led_field(hid);
1824	if (!field)
1825	return;
1826
1827	/*
1828	* field->report is accessed unlocked regarding HID core. So there might
1829	* be another incoming SET-LED request from user-space, which changes
1830	* the LED state while we assemble our outgoing buffer. However, this
1831	* doesn't matter as hid_output_report() correctly converts it into a
1832	* boolean value no matter what information is currently set on the LED
1833	* field (even garbage). So the remote device will always get a valid
1834	* request.
1835	* And in case we send a wrong value, a next led worker is spawned
1836	* for every SET-LED request so the following worker will send the
1837	* correct value, guaranteed!
1838	*/
1839
1840	report = field->report;
1841
1842	/* use custom SET_REPORT request if possible (asynchronous) */
1843	if (hid->ll_driver->request)
1844	return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1845
1846	/* fall back to generic raw-output-report */
1847	len = hid_report_len(report);
1848	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1849	if (!buf)
1850	return;
1851
1852	hid_output_report(report, data: buf);
1853	/* synchronous output report */
1854	ret = hid_hw_output_report(hdev: hid, buf, len);
1855	if (ret == -ENOSYS)
1856	hid_hw_raw_request(hdev: hid, reportnum: report->id, buf, len, rtype: HID_OUTPUT_REPORT,
1857	reqtype: HID_REQ_SET_REPORT);
1858	kfree(objp: buf);
1859	}
1860
1861	static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1862	unsigned int code, int value)
1863	{
1864	struct hid_device *hid = input_get_drvdata(dev);
1865	struct hid_field *field;
1866	int offset;
1867
1868	if (type == EV_FF)
1869	return input_ff_event(dev, type, code, value);
1870
1871	if (type != EV_LED)
1872	return -1;
1873
1874	if ((offset = hidinput_find_field(hid, type, code, field: &field)) == -1) {
1875	hid_warn(dev, "event field not found\n");
1876	return -1;
1877	}
1878
1879	hid_set_field(field, offset, value);
1880
1881	schedule_work(work: &hid->led_work);
1882	return 0;
1883	}
1884
1885	static int hidinput_open(struct input_dev *dev)
1886	{
1887	struct hid_device *hid = input_get_drvdata(dev);
1888
1889	return hid_hw_open(hdev: hid);
1890	}
1891
1892	static void hidinput_close(struct input_dev *dev)
1893	{
1894	struct hid_device *hid = input_get_drvdata(dev);
1895
1896	hid_hw_close(hdev: hid);
1897	}
1898
1899	static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1900	struct hid_report *report, bool use_logical_max)
1901	{
1902	struct hid_usage *usage;
1903	bool update_needed = false;
1904	bool get_report_completed = false;
1905	int i, j;
1906
1907	if (report->maxfield == 0)
1908	return false;
1909
1910	for (i = 0; i < report->maxfield; i++) {
1911	__s32 value = use_logical_max ?
1912	report->field[i]->logical_maximum :
1913	report->field[i]->logical_minimum;
1914
1915	/* There is no good reason for a Resolution
1916	* Multiplier to have a count other than 1.
1917	* Ignore that case.
1918	*/
1919	if (report->field[i]->report_count != 1)
1920	continue;
1921
1922	for (j = 0; j < report->field[i]->maxusage; j++) {
1923	usage = &report->field[i]->usage[j];
1924
1925	if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1926	continue;
1927
1928	/*
1929	* If we have more than one feature within this
1930	* report we need to fill in the bits from the
1931	* others before we can overwrite the ones for the
1932	* Resolution Multiplier.
1933	*
1934	* But if we're not allowed to read from the device,
1935	* we just bail. Such a device should not exist
1936	* anyway.
1937	*/
1938	if (!get_report_completed && report->maxfield > 1) {
1939	if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1940	return update_needed;
1941
1942	hid_hw_request(hdev: hid, report, reqtype: HID_REQ_GET_REPORT);
1943	hid_hw_wait(hdev: hid);
1944	get_report_completed = true;
1945	}
1946
1947	report->field[i]->value[j] = value;
1948	update_needed = true;
1949	}
1950	}
1951
1952	return update_needed;
1953	}
1954
1955	static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1956	{
1957	struct hid_report_enum *rep_enum;
1958	struct hid_report *rep;
1959	int ret;
1960
1961	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1962	list_for_each_entry(rep, &rep_enum->report_list, list) {
1963	bool update_needed = __hidinput_change_resolution_multipliers(hid,
1964	report: rep, use_logical_max: true);
1965
1966	if (update_needed) {
1967	ret = __hid_request(hid, rep, reqtype: HID_REQ_SET_REPORT);
1968	if (ret) {
1969	__hidinput_change_resolution_multipliers(hid,
1970	report: rep, use_logical_max: false);
1971	return;
1972	}
1973	}
1974	}
1975
1976	/* refresh our structs */
1977	hid_setup_resolution_multiplier(hid);
1978	}
1979
1980	static void report_features(struct hid_device *hid)
1981	{
1982	struct hid_driver *drv = hid->driver;
1983	struct hid_report_enum *rep_enum;
1984	struct hid_report *rep;
1985	struct hid_usage *usage;
1986	int i, j;
1987
1988	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1989	list_for_each_entry(rep, &rep_enum->report_list, list)
1990	for (i = 0; i < rep->maxfield; i++) {
1991	/* Ignore if report count is out of bounds. */
1992	if (rep->field[i]->report_count < 1)
1993	continue;
1994
1995	for (j = 0; j < rep->field[i]->maxusage; j++) {
1996	usage = &rep->field[i]->usage[j];
1997
1998	/* Verify if Battery Strength feature is available */
1999	if (usage->hid == HID_DC_BATTERYSTRENGTH)
2000	hidinput_setup_battery(dev: hid, report_type: HID_FEATURE_REPORT,
2001	field: rep->field[i], is_percentage: false);
2002
2003	if (drv->feature_mapping)
2004	drv->feature_mapping(hid, rep->field[i], usage);
2005	}
2006	}
2007	}
2008
2009	static struct hid_input *hidinput_allocate(struct hid_device *hid,
2010	unsigned int application)
2011	{
2012	struct hid_input *hidinput = kzalloc(size: sizeof(*hidinput), GFP_KERNEL);
2013	struct input_dev *input_dev = input_allocate_device();
2014	const char *suffix = NULL;
2015	size_t suffix_len, name_len;
2016
2017	if (!hidinput || !input_dev)
2018	goto fail;
2019
2020	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2021	hid->maxapplication > 1) {
2022	switch (application) {
2023	case HID_GD_KEYBOARD:
2024	suffix = "Keyboard";
2025	break;
2026	case HID_GD_KEYPAD:
2027	suffix = "Keypad";
2028	break;
2029	case HID_GD_MOUSE:
2030	suffix = "Mouse";
2031	break;
2032	case HID_DG_PEN:
2033	/*
2034	* yes, there is an issue here:
2035	* DG_PEN -> "Stylus"
2036	* DG_STYLUS -> "Pen"
2037	* But changing this now means users with config snippets
2038	* will have to change it and the test suite will not be happy.
2039	*/
2040	suffix = "Stylus";
2041	break;
2042	case HID_DG_STYLUS:
2043	suffix = "Pen";
2044	break;
2045	case HID_DG_TOUCHSCREEN:
2046	suffix = "Touchscreen";
2047	break;
2048	case HID_DG_TOUCHPAD:
2049	suffix = "Touchpad";
2050	break;
2051	case HID_GD_SYSTEM_CONTROL:
2052	suffix = "System Control";
2053	break;
2054	case HID_CP_CONSUMER_CONTROL:
2055	suffix = "Consumer Control";
2056	break;
2057	case HID_GD_WIRELESS_RADIO_CTLS:
2058	suffix = "Wireless Radio Control";
2059	break;
2060	case HID_GD_SYSTEM_MULTIAXIS:
2061	suffix = "System Multi Axis";
2062	break;
2063	default:
2064	break;
2065	}
2066	}
2067
2068	if (suffix) {
2069	name_len = strlen(hid->name);
2070	suffix_len = strlen(suffix);
2071	if ((name_len < suffix_len) ||
2072	strcmp(hid->name + name_len - suffix_len, suffix)) {
2073	hidinput->name = kasprintf(GFP_KERNEL, fmt: "%s %s",
2074	hid->name, suffix);
2075	if (!hidinput->name)
2076	goto fail;
2077	}
2078	}
2079
2080	input_set_drvdata(dev: input_dev, data: hid);
2081	input_dev->event = hidinput_input_event;
2082	input_dev->open = hidinput_open;
2083	input_dev->close = hidinput_close;
2084	input_dev->setkeycode = hidinput_setkeycode;
2085	input_dev->getkeycode = hidinput_getkeycode;
2086
2087	input_dev->name = hidinput->name ? hidinput->name : hid->name;
2088	input_dev->phys = hid->phys;
2089	input_dev->uniq = hid->uniq;
2090	input_dev->id.bustype = hid->bus;
2091	input_dev->id.vendor = hid->vendor;
2092	input_dev->id.product = hid->product;
2093	input_dev->id.version = hid->version;
2094	input_dev->dev.parent = &hid->dev;
2095
2096	hidinput->input = input_dev;
2097	hidinput->application = application;
2098	list_add_tail(new: &hidinput->list, head: &hid->inputs);
2099
2100	INIT_LIST_HEAD(list: &hidinput->reports);
2101
2102	return hidinput;
2103
2104	fail:
2105	kfree(objp: hidinput);
2106	input_free_device(dev: input_dev);
2107	hid_err(hid, "Out of memory during hid input probe\n");
2108	return NULL;
2109	}
2110
2111	static bool hidinput_has_been_populated(struct hid_input *hidinput)
2112	{
2113	int i;
2114	unsigned long r = 0;
2115
2116	for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2117	r |= hidinput->input->evbit[i];
2118
2119	for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2120	r |= hidinput->input->keybit[i];
2121
2122	for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2123	r |= hidinput->input->relbit[i];
2124
2125	for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2126	r |= hidinput->input->absbit[i];
2127
2128	for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2129	r |= hidinput->input->mscbit[i];
2130
2131	for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2132	r |= hidinput->input->ledbit[i];
2133
2134	for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2135	r |= hidinput->input->sndbit[i];
2136
2137	for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2138	r |= hidinput->input->ffbit[i];
2139
2140	for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2141	r |= hidinput->input->swbit[i];
2142
2143	return !!r;
2144	}
2145
2146	static void hidinput_cleanup_hidinput(struct hid_device *hid,
2147	struct hid_input *hidinput)
2148	{
2149	struct hid_report *report;
2150	int i, k;
2151
2152	list_del(entry: &hidinput->list);
2153	input_free_device(dev: hidinput->input);
2154	kfree(objp: hidinput->name);
2155
2156	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2157	if (k == HID_OUTPUT_REPORT &&
2158	hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2159	continue;
2160
2161	list_for_each_entry(report, &hid->report_enum[k].report_list,
2162	list) {
2163
2164	for (i = 0; i < report->maxfield; i++)
2165	if (report->field[i]->hidinput == hidinput)
2166	report->field[i]->hidinput = NULL;
2167	}
2168	}
2169
2170	kfree(objp: hidinput);
2171	}
2172
2173	static struct hid_input *hidinput_match(struct hid_report *report)
2174	{
2175	struct hid_device *hid = report->device;
2176	struct hid_input *hidinput;
2177
2178	list_for_each_entry(hidinput, &hid->inputs, list) {
2179	if (hidinput->report &&
2180	hidinput->report->id == report->id)
2181	return hidinput;
2182	}
2183
2184	return NULL;
2185	}
2186
2187	static struct hid_input *hidinput_match_application(struct hid_report *report)
2188	{
2189	struct hid_device *hid = report->device;
2190	struct hid_input *hidinput;
2191
2192	list_for_each_entry(hidinput, &hid->inputs, list) {
2193	if (hidinput->application == report->application)
2194	return hidinput;
2195
2196	/*
2197	* Keep SystemControl and ConsumerControl applications together
2198	* with the main keyboard, if present.
2199	*/
2200	if ((report->application == HID_GD_SYSTEM_CONTROL ||
2201	report->application == HID_CP_CONSUMER_CONTROL) &&
2202	hidinput->application == HID_GD_KEYBOARD) {
2203	return hidinput;
2204	}
2205	}
2206
2207	return NULL;
2208	}
2209
2210	static inline void hidinput_configure_usages(struct hid_input *hidinput,
2211	struct hid_report *report)
2212	{
2213	int i, j, k;
2214	int first_field_index = 0;
2215	int slot_collection_index = -1;
2216	int prev_collection_index = -1;
2217	unsigned int slot_idx = 0;
2218	struct hid_field *field;
2219
2220	/*
2221	* First tag all the fields that are part of a slot,
2222	* a slot needs to have one Contact ID in the collection
2223	*/
2224	for (i = 0; i < report->maxfield; i++) {
2225	field = report->field[i];
2226
2227	/* ignore fields without usage */
2228	if (field->maxusage < 1)
2229	continue;
2230
2231	/*
2232	* janitoring when collection_index changes
2233	*/
2234	if (prev_collection_index != field->usage->collection_index) {
2235	prev_collection_index = field->usage->collection_index;
2236	first_field_index = i;
2237	}
2238
2239	/*
2240	* if we already found a Contact ID in the collection,
2241	* tag and continue to the next.
2242	*/
2243	if (slot_collection_index == field->usage->collection_index) {
2244	field->slot_idx = slot_idx;
2245	continue;
2246	}
2247
2248	/* check if the current field has Contact ID */
2249	for (j = 0; j < field->maxusage; j++) {
2250	if (field->usage[j].hid == HID_DG_CONTACTID) {
2251	slot_collection_index = field->usage->collection_index;
2252	slot_idx++;
2253
2254	/*
2255	* mark all previous fields and this one in the
2256	* current collection to be slotted.
2257	*/
2258	for (k = first_field_index; k <= i; k++)
2259	report->field[k]->slot_idx = slot_idx;
2260	break;
2261	}
2262	}
2263	}
2264
2265	for (i = 0; i < report->maxfield; i++)
2266	for (j = 0; j < report->field[i]->maxusage; j++)
2267	hidinput_configure_usage(hidinput, field: report->field[i],
2268	usage: report->field[i]->usage + j,
2269	usage_index: j);
2270	}
2271
2272	/*
2273	* Register the input device; print a message.
2274	* Configure the input layer interface
2275	* Read all reports and initialize the absolute field values.
2276	*/
2277
2278	int hidinput_connect(struct hid_device *hid, unsigned int force)
2279	{
2280	struct hid_driver *drv = hid->driver;
2281	struct hid_report *report;
2282	struct hid_input *next, *hidinput = NULL;
2283	unsigned int application;
2284	int i, k;
2285
2286	INIT_LIST_HEAD(list: &hid->inputs);
2287	INIT_WORK(&hid->led_work, hidinput_led_worker);
2288
2289	hid->status &= ~HID_STAT_DUP_DETECTED;
2290
2291	if (!force) {
2292	for (i = 0; i < hid->maxcollection; i++) {
2293	struct hid_collection *col = &hid->collection[i];
2294	if (col->type == HID_COLLECTION_APPLICATION ||
2295	col->type == HID_COLLECTION_PHYSICAL)
2296	if (IS_INPUT_APPLICATION(col->usage))
2297	break;
2298	}
2299
2300	if (i == hid->maxcollection)
2301	return -1;
2302	}
2303
2304	report_features(hid);
2305
2306	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2307	if (k == HID_OUTPUT_REPORT &&
2308	hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2309	continue;
2310
2311	list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2312
2313	if (!report->maxfield)
2314	continue;
2315
2316	application = report->application;
2317
2318	/*
2319	* Find the previous hidinput report attached
2320	* to this report id.
2321	*/
2322	if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2323	hidinput = hidinput_match(report);
2324	else if (hid->maxapplication > 1 &&
2325	(hid->quirks & HID_QUIRK_INPUT_PER_APP))
2326	hidinput = hidinput_match_application(report);
2327
2328	if (!hidinput) {
2329	hidinput = hidinput_allocate(hid, application);
2330	if (!hidinput)
2331	goto out_unwind;
2332	}
2333
2334	hidinput_configure_usages(hidinput, report);
2335
2336	if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2337	hidinput->report = report;
2338
2339	list_add_tail(new: &report->hidinput_list,
2340	head: &hidinput->reports);
2341	}
2342	}
2343
2344	hidinput_change_resolution_multipliers(hid);
2345
2346	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2347	if (drv->input_configured &&
2348	drv->input_configured(hid, hidinput))
2349	goto out_unwind;
2350
2351	if (!hidinput_has_been_populated(hidinput)) {
2352	/* no need to register an input device not populated */
2353	hidinput_cleanup_hidinput(hid, hidinput);
2354	continue;
2355	}
2356
2357	if (input_register_device(hidinput->input))
2358	goto out_unwind;
2359	hidinput->registered = true;
2360	}
2361
2362	if (list_empty(head: &hid->inputs)) {
2363	hid_err(hid, "No inputs registered, leaving\n");
2364	goto out_unwind;
2365	}
2366
2367	if (hid->status & HID_STAT_DUP_DETECTED)
2368	hid_dbg(hid,
2369	"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2370
2371	return 0;
2372
2373	out_unwind:
2374	/* unwind the ones we already registered */
2375	hidinput_disconnect(hid);
2376
2377	return -1;
2378	}
2379	EXPORT_SYMBOL_GPL(hidinput_connect);
2380
2381	void hidinput_disconnect(struct hid_device *hid)
2382	{
2383	struct hid_input *hidinput, *next;
2384
2385	hidinput_cleanup_battery(dev: hid);
2386
2387	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2388	list_del(entry: &hidinput->list);
2389	if (hidinput->registered)
2390	input_unregister_device(hidinput->input);
2391	else
2392	input_free_device(dev: hidinput->input);
2393	kfree(objp: hidinput->name);
2394	kfree(objp: hidinput);
2395	}
2396
2397	/* led_work is spawned by input_dev callbacks, but doesn't access the
2398	* parent input_dev at all. Once all input devices are removed, we
2399	* know that led_work will never get restarted, so we can cancel it
2400	* synchronously and are safe. */
2401	cancel_work_sync(work: &hid->led_work);
2402	}
2403	EXPORT_SYMBOL_GPL(hidinput_disconnect);
2404
2405	#ifdef CONFIG_HID_KUNIT_TEST
2406	#include "hid-input-test.c"
2407	#endif
2408