xref: /openbmc/linux/drivers/hid/hid-input.c (revision 8f91116f)
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_index, ke->index, index);
169 	else if (input_scancode_to_scalar(ke, &scancode) == 0)
170 		usage = hidinput_find_key(hid, match_scancode, scancode, index);
171 	else
172 		usage = NULL;
173 
174 	return usage;
175 }
176 
177 static int hidinput_getkeycode(struct input_dev *dev,
178 			       struct input_keymap_entry *ke)
179 {
180 	struct hid_device *hid = input_get_drvdata(dev);
181 	struct hid_usage *usage;
182 	unsigned int scancode, index;
183 
184 	usage = hidinput_locate_usage(hid, ke, &index);
185 	if (usage) {
186 		ke->keycode = usage->type == EV_KEY ?
187 				usage->code : KEY_RESERVED;
188 		ke->index = index;
189 		scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
190 		ke->len = sizeof(scancode);
191 		memcpy(ke->scancode, &scancode, sizeof(scancode));
192 		return 0;
193 	}
194 
195 	return -EINVAL;
196 }
197 
198 static int hidinput_setkeycode(struct input_dev *dev,
199 			       const struct input_keymap_entry *ke,
200 			       unsigned int *old_keycode)
201 {
202 	struct hid_device *hid = input_get_drvdata(dev);
203 	struct hid_usage *usage;
204 
205 	usage = hidinput_locate_usage(hid, ke, NULL);
206 	if (usage) {
207 		*old_keycode = usage->type == EV_KEY ?
208 				usage->code : KEY_RESERVED;
209 		usage->type = EV_KEY;
210 		usage->code = ke->keycode;
211 
212 		clear_bit(*old_keycode, dev->keybit);
213 		set_bit(usage->code, dev->keybit);
214 		dbg_hid("Assigned keycode %d to HID usage code %x\n",
215 			usage->code, usage->hid);
216 
217 		/*
218 		 * Set the keybit for the old keycode if the old keycode is used
219 		 * by another key
220 		 */
221 		if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
222 			set_bit(*old_keycode, dev->keybit);
223 
224 		return 0;
225 	}
226 
227 	return -EINVAL;
228 }
229 
230 
231 /**
232  * hidinput_calc_abs_res - calculate an absolute axis resolution
233  * @field: the HID report field to calculate resolution for
234  * @code: axis code
235  *
236  * The formula is:
237  *                         (logical_maximum - logical_minimum)
238  * resolution = ----------------------------------------------------------
239  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
240  *
241  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
242  *
243  * Only exponent 1 length units are processed. Centimeters and inches are
244  * converted to millimeters. Degrees are converted to radians.
245  */
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_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
377 	  HID_BATTERY_QUIRK_IGNORE },
378 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
379 	  HID_BATTERY_QUIRK_IGNORE },
380 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
381 	  HID_BATTERY_QUIRK_AVOID_QUERY },
382 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
383 	  HID_BATTERY_QUIRK_AVOID_QUERY },
384 	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
385 	  HID_BATTERY_QUIRK_AVOID_QUERY },
386 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
387 	  HID_BATTERY_QUIRK_AVOID_QUERY },
388 	/*
389 	 * Elan I2C-HID touchscreens seem to all report a non present battery,
390 	 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C-HID devices.
391 	 */
392 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
393 	{}
394 };
395 
396 static unsigned find_battery_quirk(struct hid_device *hdev)
397 {
398 	unsigned quirks = 0;
399 	const struct hid_device_id *match;
400 
401 	match = hid_match_id(hdev, hid_battery_quirks);
402 	if (match != NULL)
403 		quirks = match->driver_data;
404 
405 	return quirks;
406 }
407 
408 static int hidinput_scale_battery_capacity(struct hid_device *dev,
409 					   int value)
410 {
411 	if (dev->battery_min < dev->battery_max &&
412 	    value >= dev->battery_min && value <= dev->battery_max)
413 		value = ((value - dev->battery_min) * 100) /
414 			(dev->battery_max - dev->battery_min);
415 
416 	return value;
417 }
418 
419 static int hidinput_query_battery_capacity(struct hid_device *dev)
420 {
421 	u8 *buf;
422 	int ret;
423 
424 	buf = kmalloc(4, GFP_KERNEL);
425 	if (!buf)
426 		return -ENOMEM;
427 
428 	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
429 				 dev->battery_report_type, HID_REQ_GET_REPORT);
430 	if (ret < 2) {
431 		kfree(buf);
432 		return -ENODATA;
433 	}
434 
435 	ret = hidinput_scale_battery_capacity(dev, buf[1]);
436 	kfree(buf);
437 	return ret;
438 }
439 
440 static int hidinput_get_battery_property(struct power_supply *psy,
441 					 enum power_supply_property prop,
442 					 union power_supply_propval *val)
443 {
444 	struct hid_device *dev = power_supply_get_drvdata(psy);
445 	int value;
446 	int ret = 0;
447 
448 	switch (prop) {
449 	case POWER_SUPPLY_PROP_PRESENT:
450 	case POWER_SUPPLY_PROP_ONLINE:
451 		val->intval = 1;
452 		break;
453 
454 	case POWER_SUPPLY_PROP_CAPACITY:
455 		if (dev->battery_status != HID_BATTERY_REPORTED &&
456 		    !dev->battery_avoid_query) {
457 			value = hidinput_query_battery_capacity(dev);
458 			if (value < 0)
459 				return value;
460 		} else  {
461 			value = dev->battery_capacity;
462 		}
463 
464 		val->intval = value;
465 		break;
466 
467 	case POWER_SUPPLY_PROP_MODEL_NAME:
468 		val->strval = dev->name;
469 		break;
470 
471 	case POWER_SUPPLY_PROP_STATUS:
472 		if (dev->battery_status != HID_BATTERY_REPORTED &&
473 		    !dev->battery_avoid_query) {
474 			value = hidinput_query_battery_capacity(dev);
475 			if (value < 0)
476 				return value;
477 
478 			dev->battery_capacity = value;
479 			dev->battery_status = HID_BATTERY_QUERIED;
480 		}
481 
482 		if (dev->battery_status == HID_BATTERY_UNKNOWN)
483 			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
484 		else
485 			val->intval = dev->battery_charge_status;
486 		break;
487 
488 	case POWER_SUPPLY_PROP_SCOPE:
489 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
490 		break;
491 
492 	default:
493 		ret = -EINVAL;
494 		break;
495 	}
496 
497 	return ret;
498 }
499 
500 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
501 				  struct hid_field *field, bool is_percentage)
502 {
503 	struct power_supply_desc *psy_desc;
504 	struct power_supply_config psy_cfg = { .drv_data = dev, };
505 	unsigned quirks;
506 	s32 min, max;
507 	int error;
508 
509 	if (dev->battery)
510 		return 0;	/* already initialized? */
511 
512 	quirks = find_battery_quirk(dev);
513 
514 	hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
515 		dev->bus, dev->vendor, dev->product, dev->version, quirks);
516 
517 	if (quirks & HID_BATTERY_QUIRK_IGNORE)
518 		return 0;
519 
520 	psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
521 	if (!psy_desc)
522 		return -ENOMEM;
523 
524 	psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
525 				   strlen(dev->uniq) ?
526 					dev->uniq : dev_name(&dev->dev));
527 	if (!psy_desc->name) {
528 		error = -ENOMEM;
529 		goto err_free_mem;
530 	}
531 
532 	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
533 	psy_desc->properties = hidinput_battery_props;
534 	psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
535 	psy_desc->use_for_apm = 0;
536 	psy_desc->get_property = hidinput_get_battery_property;
537 
538 	min = field->logical_minimum;
539 	max = field->logical_maximum;
540 
541 	if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
542 		min = 0;
543 		max = 100;
544 	}
545 
546 	if (quirks & HID_BATTERY_QUIRK_FEATURE)
547 		report_type = HID_FEATURE_REPORT;
548 
549 	dev->battery_min = min;
550 	dev->battery_max = max;
551 	dev->battery_report_type = report_type;
552 	dev->battery_report_id = field->report->id;
553 	dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
554 
555 	/*
556 	 * Stylus is normally not connected to the device and thus we
557 	 * can't query the device and get meaningful battery strength.
558 	 * We have to wait for the device to report it on its own.
559 	 */
560 	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
561 				   field->physical == HID_DG_STYLUS;
562 
563 	if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
564 		dev->battery_avoid_query = true;
565 
566 	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
567 	if (IS_ERR(dev->battery)) {
568 		error = PTR_ERR(dev->battery);
569 		hid_warn(dev, "can't register power supply: %d\n", error);
570 		goto err_free_name;
571 	}
572 
573 	power_supply_powers(dev->battery, &dev->dev);
574 	return 0;
575 
576 err_free_name:
577 	kfree(psy_desc->name);
578 err_free_mem:
579 	kfree(psy_desc);
580 	dev->battery = NULL;
581 	return error;
582 }
583 
584 static void hidinput_cleanup_battery(struct hid_device *dev)
585 {
586 	const struct power_supply_desc *psy_desc;
587 
588 	if (!dev->battery)
589 		return;
590 
591 	psy_desc = dev->battery->desc;
592 	power_supply_unregister(dev->battery);
593 	kfree(psy_desc->name);
594 	kfree(psy_desc);
595 	dev->battery = NULL;
596 }
597 
598 static void hidinput_update_battery(struct hid_device *dev, int value)
599 {
600 	int capacity;
601 
602 	if (!dev->battery)
603 		return;
604 
605 	if (value == 0 || value < dev->battery_min || value > dev->battery_max)
606 		return;
607 
608 	capacity = hidinput_scale_battery_capacity(dev, value);
609 
610 	if (dev->battery_status != HID_BATTERY_REPORTED ||
611 	    capacity != dev->battery_capacity ||
612 	    ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
613 		dev->battery_capacity = capacity;
614 		dev->battery_status = HID_BATTERY_REPORTED;
615 		dev->battery_ratelimit_time =
616 			ktime_add_ms(ktime_get_coarse(), 30 * 1000);
617 		power_supply_changed(dev->battery);
618 	}
619 }
620 
621 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
622 					       unsigned int usage, int value)
623 {
624 	switch (usage) {
625 	case HID_BAT_CHARGING:
626 		dev->battery_charge_status = value ?
627 					     POWER_SUPPLY_STATUS_CHARGING :
628 					     POWER_SUPPLY_STATUS_DISCHARGING;
629 		return true;
630 	}
631 
632 	return false;
633 }
634 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
635 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
636 				  struct hid_field *field, bool is_percentage)
637 {
638 	return 0;
639 }
640 
641 static void hidinput_cleanup_battery(struct hid_device *dev)
642 {
643 }
644 
645 static void hidinput_update_battery(struct hid_device *dev, int value)
646 {
647 }
648 
649 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
650 					       unsigned int usage, int value)
651 {
652 	return false;
653 }
654 #endif	/* CONFIG_HID_BATTERY_STRENGTH */
655 
656 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
657 					 unsigned int type, unsigned int usage)
658 {
659 	struct hid_collection *collection;
660 
661 	collection = &device->collection[field->usage->collection_index];
662 
663 	return collection->type == type && collection->usage == usage;
664 }
665 
666 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
667 				     struct hid_usage *usage, unsigned int usage_index)
668 {
669 	struct input_dev *input = hidinput->input;
670 	struct hid_device *device = input_get_drvdata(input);
671 	const struct usage_priority *usage_priority = NULL;
672 	int max = 0, code;
673 	unsigned int i = 0;
674 	unsigned long *bit = NULL;
675 
676 	field->hidinput = hidinput;
677 
678 	if (field->flags & HID_MAIN_ITEM_CONSTANT)
679 		goto ignore;
680 
681 	/* Ignore if report count is out of bounds. */
682 	if (field->report_count < 1)
683 		goto ignore;
684 
685 	/* only LED usages are supported in output fields */
686 	if (field->report_type == HID_OUTPUT_REPORT &&
687 			(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
688 		goto ignore;
689 	}
690 
691 	/* assign a priority based on the static list declared here */
692 	for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
693 		if (usage->hid == hidinput_usages_priorities[i].usage) {
694 			usage_priority = &hidinput_usages_priorities[i];
695 
696 			field->usages_priorities[usage_index] =
697 				(ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
698 			break;
699 		}
700 	}
701 
702 	/*
703 	 * For slotted devices, we need to also add the slot index
704 	 * in the priority.
705 	 */
706 	if (usage_priority && usage_priority->global)
707 		field->usages_priorities[usage_index] |=
708 			usage_priority->slot_overwrite;
709 	else
710 		field->usages_priorities[usage_index] |=
711 			(0xff - field->slot_idx) << 16;
712 
713 	if (device->driver->input_mapping) {
714 		int ret = device->driver->input_mapping(device, hidinput, field,
715 				usage, &bit, &max);
716 		if (ret > 0)
717 			goto mapped;
718 		if (ret < 0)
719 			goto ignore;
720 	}
721 
722 	switch (usage->hid & HID_USAGE_PAGE) {
723 	case HID_UP_UNDEFINED:
724 		goto ignore;
725 
726 	case HID_UP_KEYBOARD:
727 		set_bit(EV_REP, input->evbit);
728 
729 		if ((usage->hid & HID_USAGE) < 256) {
730 			if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
731 			map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
732 		} else
733 			map_key(KEY_UNKNOWN);
734 
735 		break;
736 
737 	case HID_UP_BUTTON:
738 		code = ((usage->hid - 1) & HID_USAGE);
739 
740 		switch (field->application) {
741 		case HID_GD_MOUSE:
742 		case HID_GD_POINTER:  code += BTN_MOUSE; break;
743 		case HID_GD_JOYSTICK:
744 				if (code <= 0xf)
745 					code += BTN_JOYSTICK;
746 				else
747 					code += BTN_TRIGGER_HAPPY - 0x10;
748 				break;
749 		case HID_GD_GAMEPAD:
750 				if (code <= 0xf)
751 					code += BTN_GAMEPAD;
752 				else
753 					code += BTN_TRIGGER_HAPPY - 0x10;
754 				break;
755 		case HID_CP_CONSUMER_CONTROL:
756 				if (hidinput_field_in_collection(device, field,
757 								 HID_COLLECTION_NAMED_ARRAY,
758 								 HID_CP_PROGRAMMABLEBUTTONS)) {
759 					if (code <= 0x1d)
760 						code += KEY_MACRO1;
761 					else
762 						code += BTN_TRIGGER_HAPPY - 0x1e;
763 					break;
764 				}
765 				fallthrough;
766 		default:
767 			switch (field->physical) {
768 			case HID_GD_MOUSE:
769 			case HID_GD_POINTER:  code += BTN_MOUSE; break;
770 			case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
771 			case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
772 			default:              code += BTN_MISC;
773 			}
774 		}
775 
776 		map_key(code);
777 		break;
778 
779 	case HID_UP_SIMULATION:
780 		switch (usage->hid & 0xffff) {
781 		case 0xba: map_abs(ABS_RUDDER);   break;
782 		case 0xbb: map_abs(ABS_THROTTLE); break;
783 		case 0xc4: map_abs(ABS_GAS);      break;
784 		case 0xc5: map_abs(ABS_BRAKE);    break;
785 		case 0xc8: map_abs(ABS_WHEEL);    break;
786 		default:   goto ignore;
787 		}
788 		break;
789 
790 	case HID_UP_GENDESK:
791 		if ((usage->hid & 0xf0) == 0x80) {	/* SystemControl */
792 			switch (usage->hid & 0xf) {
793 			case 0x1: map_key_clear(KEY_POWER);  break;
794 			case 0x2: map_key_clear(KEY_SLEEP);  break;
795 			case 0x3: map_key_clear(KEY_WAKEUP); break;
796 			case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
797 			case 0x5: map_key_clear(KEY_MENU); break;
798 			case 0x6: map_key_clear(KEY_PROG1); break;
799 			case 0x7: map_key_clear(KEY_HELP); break;
800 			case 0x8: map_key_clear(KEY_EXIT); break;
801 			case 0x9: map_key_clear(KEY_SELECT); break;
802 			case 0xa: map_key_clear(KEY_RIGHT); break;
803 			case 0xb: map_key_clear(KEY_LEFT); break;
804 			case 0xc: map_key_clear(KEY_UP); break;
805 			case 0xd: map_key_clear(KEY_DOWN); break;
806 			case 0xe: map_key_clear(KEY_POWER2); break;
807 			case 0xf: map_key_clear(KEY_RESTART); break;
808 			default: goto unknown;
809 			}
810 			break;
811 		}
812 
813 		if ((usage->hid & 0xf0) == 0x90) { /* SystemControl*/
814 			switch (usage->hid & 0xf) {
815 			case 0xb: map_key_clear(KEY_DO_NOT_DISTURB); break;
816 			default: goto ignore;
817 			}
818 			break;
819 		}
820 
821 		if ((usage->hid & 0xf0) == 0xa0) {	/* SystemControl */
822 			switch (usage->hid & 0xf) {
823 			case 0x9: map_key_clear(KEY_MICMUTE); break;
824 			case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
825 			default: goto ignore;
826 			}
827 			break;
828 		}
829 
830 		if ((usage->hid & 0xf0) == 0xb0) {	/* SC - Display */
831 			switch (usage->hid & 0xf) {
832 			case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
833 			default: goto ignore;
834 			}
835 			break;
836 		}
837 
838 		/*
839 		 * Some lazy vendors declare 255 usages for System Control,
840 		 * leading to the creation of ABS_X|Y axis and too many others.
841 		 * It wouldn't be a problem if joydev doesn't consider the
842 		 * device as a joystick then.
843 		 */
844 		if (field->application == HID_GD_SYSTEM_CONTROL)
845 			goto ignore;
846 
847 		if ((usage->hid & 0xf0) == 0x90) {	/* D-pad */
848 			switch (usage->hid) {
849 			case HID_GD_UP:	   usage->hat_dir = 1; break;
850 			case HID_GD_DOWN:  usage->hat_dir = 5; break;
851 			case HID_GD_RIGHT: usage->hat_dir = 3; break;
852 			case HID_GD_LEFT:  usage->hat_dir = 7; break;
853 			default: goto unknown;
854 			}
855 			if (field->dpad) {
856 				map_abs(field->dpad);
857 				goto ignore;
858 			}
859 			map_abs(ABS_HAT0X);
860 			break;
861 		}
862 
863 		switch (usage->hid) {
864 		/* These usage IDs map directly to the usage codes. */
865 		case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
866 		case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
867 			if (field->flags & HID_MAIN_ITEM_RELATIVE)
868 				map_rel(usage->hid & 0xf);
869 			else
870 				map_abs_clear(usage->hid & 0xf);
871 			break;
872 
873 		case HID_GD_WHEEL:
874 			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
875 				set_bit(REL_WHEEL, input->relbit);
876 				map_rel(REL_WHEEL_HI_RES);
877 			} else {
878 				map_abs(usage->hid & 0xf);
879 			}
880 			break;
881 		case HID_GD_SLIDER: case HID_GD_DIAL:
882 			if (field->flags & HID_MAIN_ITEM_RELATIVE)
883 				map_rel(usage->hid & 0xf);
884 			else
885 				map_abs(usage->hid & 0xf);
886 			break;
887 
888 		case HID_GD_HATSWITCH:
889 			usage->hat_min = field->logical_minimum;
890 			usage->hat_max = field->logical_maximum;
891 			map_abs(ABS_HAT0X);
892 			break;
893 
894 		case HID_GD_START:	map_key_clear(BTN_START);	break;
895 		case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;
896 
897 		case HID_GD_RFKILL_BTN:
898 			/* MS wireless radio ctl extension, also check CA */
899 			if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
900 				map_key_clear(KEY_RFKILL);
901 				/* We need to simulate the btn release */
902 				field->flags |= HID_MAIN_ITEM_RELATIVE;
903 				break;
904 			}
905 			goto unknown;
906 
907 		default: goto unknown;
908 		}
909 
910 		break;
911 
912 	case HID_UP_LED:
913 		switch (usage->hid & 0xffff) {		      /* HID-Value:                   */
914 		case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
915 		case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
916 		case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
917 		case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
918 		case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
919 		case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
920 		case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
921 		case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
922 		case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
923 		case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
924 		case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
925 
926 		default: goto ignore;
927 		}
928 		break;
929 
930 	case HID_UP_DIGITIZER:
931 		if ((field->application & 0xff) == 0x01) /* Digitizer */
932 			__set_bit(INPUT_PROP_POINTER, input->propbit);
933 		else if ((field->application & 0xff) == 0x02) /* Pen */
934 			__set_bit(INPUT_PROP_DIRECT, input->propbit);
935 
936 		switch (usage->hid & 0xff) {
937 		case 0x00: /* Undefined */
938 			goto ignore;
939 
940 		case 0x30: /* TipPressure */
941 			if (!test_bit(BTN_TOUCH, input->keybit)) {
942 				device->quirks |= HID_QUIRK_NOTOUCH;
943 				set_bit(EV_KEY, input->evbit);
944 				set_bit(BTN_TOUCH, input->keybit);
945 			}
946 			map_abs_clear(ABS_PRESSURE);
947 			break;
948 
949 		case 0x32: /* InRange */
950 			switch (field->physical) {
951 			case HID_DG_PUCK:
952 				map_key(BTN_TOOL_MOUSE);
953 				break;
954 			case HID_DG_FINGER:
955 				map_key(BTN_TOOL_FINGER);
956 				break;
957 			default:
958 				/*
959 				 * If the physical is not given,
960 				 * rely on the application.
961 				 */
962 				if (!field->physical) {
963 					switch (field->application) {
964 					case HID_DG_TOUCHSCREEN:
965 					case HID_DG_TOUCHPAD:
966 						map_key_clear(BTN_TOOL_FINGER);
967 						break;
968 					default:
969 						map_key_clear(BTN_TOOL_PEN);
970 					}
971 				} else {
972 					map_key(BTN_TOOL_PEN);
973 				}
974 				break;
975 			}
976 			break;
977 
978 		case 0x3b: /* Battery Strength */
979 			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
980 			usage->type = EV_PWR;
981 			return;
982 
983 		case 0x3c: /* Invert */
984 			device->quirks &= ~HID_QUIRK_NOINVERT;
985 			map_key_clear(BTN_TOOL_RUBBER);
986 			break;
987 
988 		case 0x3d: /* X Tilt */
989 			map_abs_clear(ABS_TILT_X);
990 			break;
991 
992 		case 0x3e: /* Y Tilt */
993 			map_abs_clear(ABS_TILT_Y);
994 			break;
995 
996 		case 0x33: /* Touch */
997 		case 0x42: /* TipSwitch */
998 		case 0x43: /* TipSwitch2 */
999 			device->quirks &= ~HID_QUIRK_NOTOUCH;
1000 			map_key_clear(BTN_TOUCH);
1001 			break;
1002 
1003 		case 0x44: /* BarrelSwitch */
1004 			map_key_clear(BTN_STYLUS);
1005 			break;
1006 
1007 		case 0x45: /* ERASER */
1008 			/*
1009 			 * This event is reported when eraser tip touches the surface.
1010 			 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1011 			 * by Invert if tool reports proximity or by Eraser directly.
1012 			 */
1013 			if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1014 				device->quirks |= HID_QUIRK_NOINVERT;
1015 				set_bit(BTN_TOOL_RUBBER, input->keybit);
1016 			}
1017 			map_key_clear(BTN_TOUCH);
1018 			break;
1019 
1020 		case 0x46: /* TabletPick */
1021 		case 0x5a: /* SecondaryBarrelSwitch */
1022 			map_key_clear(BTN_STYLUS2);
1023 			break;
1024 
1025 		case 0x5b: /* TransducerSerialNumber */
1026 		case 0x6e: /* TransducerSerialNumber2 */
1027 			map_msc(MSC_SERIAL);
1028 			break;
1029 
1030 		default:  goto unknown;
1031 		}
1032 		break;
1033 
1034 	case HID_UP_TELEPHONY:
1035 		switch (usage->hid & HID_USAGE) {
1036 		case 0x2f: map_key_clear(KEY_MICMUTE);		break;
1037 		case 0xb0: map_key_clear(KEY_NUMERIC_0);	break;
1038 		case 0xb1: map_key_clear(KEY_NUMERIC_1);	break;
1039 		case 0xb2: map_key_clear(KEY_NUMERIC_2);	break;
1040 		case 0xb3: map_key_clear(KEY_NUMERIC_3);	break;
1041 		case 0xb4: map_key_clear(KEY_NUMERIC_4);	break;
1042 		case 0xb5: map_key_clear(KEY_NUMERIC_5);	break;
1043 		case 0xb6: map_key_clear(KEY_NUMERIC_6);	break;
1044 		case 0xb7: map_key_clear(KEY_NUMERIC_7);	break;
1045 		case 0xb8: map_key_clear(KEY_NUMERIC_8);	break;
1046 		case 0xb9: map_key_clear(KEY_NUMERIC_9);	break;
1047 		case 0xba: map_key_clear(KEY_NUMERIC_STAR);	break;
1048 		case 0xbb: map_key_clear(KEY_NUMERIC_POUND);	break;
1049 		case 0xbc: map_key_clear(KEY_NUMERIC_A);	break;
1050 		case 0xbd: map_key_clear(KEY_NUMERIC_B);	break;
1051 		case 0xbe: map_key_clear(KEY_NUMERIC_C);	break;
1052 		case 0xbf: map_key_clear(KEY_NUMERIC_D);	break;
1053 		default: goto ignore;
1054 		}
1055 		break;
1056 
1057 	case HID_UP_CONSUMER:	/* USB HUT v1.12, pages 75-84 */
1058 		switch (usage->hid & HID_USAGE) {
1059 		case 0x000: goto ignore;
1060 		case 0x030: map_key_clear(KEY_POWER);		break;
1061 		case 0x031: map_key_clear(KEY_RESTART);		break;
1062 		case 0x032: map_key_clear(KEY_SLEEP);		break;
1063 		case 0x034: map_key_clear(KEY_SLEEP);		break;
1064 		case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1065 		case 0x036: map_key_clear(BTN_MISC);		break;
1066 
1067 		case 0x040: map_key_clear(KEY_MENU);		break; /* Menu */
1068 		case 0x041: map_key_clear(KEY_SELECT);		break; /* Menu Pick */
1069 		case 0x042: map_key_clear(KEY_UP);		break; /* Menu Up */
1070 		case 0x043: map_key_clear(KEY_DOWN);		break; /* Menu Down */
1071 		case 0x044: map_key_clear(KEY_LEFT);		break; /* Menu Left */
1072 		case 0x045: map_key_clear(KEY_RIGHT);		break; /* Menu Right */
1073 		case 0x046: map_key_clear(KEY_ESC);		break; /* Menu Escape */
1074 		case 0x047: map_key_clear(KEY_KPPLUS);		break; /* Menu Value Increase */
1075 		case 0x048: map_key_clear(KEY_KPMINUS);		break; /* Menu Value Decrease */
1076 
1077 		case 0x060: map_key_clear(KEY_INFO);		break; /* Data On Screen */
1078 		case 0x061: map_key_clear(KEY_SUBTITLE);	break; /* Closed Caption */
1079 		case 0x063: map_key_clear(KEY_VCR);		break; /* VCR/TV */
1080 		case 0x065: map_key_clear(KEY_CAMERA);		break; /* Snapshot */
1081 		case 0x069: map_key_clear(KEY_RED);		break;
1082 		case 0x06a: map_key_clear(KEY_GREEN);		break;
1083 		case 0x06b: map_key_clear(KEY_BLUE);		break;
1084 		case 0x06c: map_key_clear(KEY_YELLOW);		break;
1085 		case 0x06d: map_key_clear(KEY_ASPECT_RATIO);	break;
1086 
1087 		case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);		break;
1088 		case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);		break;
1089 		case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);	break;
1090 		case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);		break;
1091 		case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);		break;
1092 		case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);		break;
1093 
1094 		case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);	break;
1095 		case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);	break;
1096 		case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);	break;
1097 
1098 		case 0x079: map_key_clear(KEY_KBDILLUMUP);	break;
1099 		case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);	break;
1100 		case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1101 
1102 		case 0x082: map_key_clear(KEY_VIDEO_NEXT);	break;
1103 		case 0x083: map_key_clear(KEY_LAST);		break;
1104 		case 0x084: map_key_clear(KEY_ENTER);		break;
1105 		case 0x088: map_key_clear(KEY_PC);		break;
1106 		case 0x089: map_key_clear(KEY_TV);		break;
1107 		case 0x08a: map_key_clear(KEY_WWW);		break;
1108 		case 0x08b: map_key_clear(KEY_DVD);		break;
1109 		case 0x08c: map_key_clear(KEY_PHONE);		break;
1110 		case 0x08d: map_key_clear(KEY_PROGRAM);		break;
1111 		case 0x08e: map_key_clear(KEY_VIDEOPHONE);	break;
1112 		case 0x08f: map_key_clear(KEY_GAMES);		break;
1113 		case 0x090: map_key_clear(KEY_MEMO);		break;
1114 		case 0x091: map_key_clear(KEY_CD);		break;
1115 		case 0x092: map_key_clear(KEY_VCR);		break;
1116 		case 0x093: map_key_clear(KEY_TUNER);		break;
1117 		case 0x094: map_key_clear(KEY_EXIT);		break;
1118 		case 0x095: map_key_clear(KEY_HELP);		break;
1119 		case 0x096: map_key_clear(KEY_TAPE);		break;
1120 		case 0x097: map_key_clear(KEY_TV2);		break;
1121 		case 0x098: map_key_clear(KEY_SAT);		break;
1122 		case 0x09a: map_key_clear(KEY_PVR);		break;
1123 
1124 		case 0x09c: map_key_clear(KEY_CHANNELUP);	break;
1125 		case 0x09d: map_key_clear(KEY_CHANNELDOWN);	break;
1126 		case 0x0a0: map_key_clear(KEY_VCR2);		break;
1127 
1128 		case 0x0b0: map_key_clear(KEY_PLAY);		break;
1129 		case 0x0b1: map_key_clear(KEY_PAUSE);		break;
1130 		case 0x0b2: map_key_clear(KEY_RECORD);		break;
1131 		case 0x0b3: map_key_clear(KEY_FASTFORWARD);	break;
1132 		case 0x0b4: map_key_clear(KEY_REWIND);		break;
1133 		case 0x0b5: map_key_clear(KEY_NEXTSONG);	break;
1134 		case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);	break;
1135 		case 0x0b7: map_key_clear(KEY_STOPCD);		break;
1136 		case 0x0b8: map_key_clear(KEY_EJECTCD);		break;
1137 		case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);	break;
1138 		case 0x0b9: map_key_clear(KEY_SHUFFLE);		break;
1139 		case 0x0bf: map_key_clear(KEY_SLOW);		break;
1140 
1141 		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
1142 		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
1143 
1144 		case 0x0d8: map_key_clear(KEY_DICTATE);		break;
1145 		case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);	break;
1146 
1147 		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
1148 		case 0x0e2: map_key_clear(KEY_MUTE);		break;
1149 		case 0x0e5: map_key_clear(KEY_BASSBOOST);	break;
1150 		case 0x0e9: map_key_clear(KEY_VOLUMEUP);	break;
1151 		case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);	break;
1152 		case 0x0f5: map_key_clear(KEY_SLOW);		break;
1153 
1154 		case 0x181: map_key_clear(KEY_BUTTONCONFIG);	break;
1155 		case 0x182: map_key_clear(KEY_BOOKMARKS);	break;
1156 		case 0x183: map_key_clear(KEY_CONFIG);		break;
1157 		case 0x184: map_key_clear(KEY_WORDPROCESSOR);	break;
1158 		case 0x185: map_key_clear(KEY_EDITOR);		break;
1159 		case 0x186: map_key_clear(KEY_SPREADSHEET);	break;
1160 		case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);	break;
1161 		case 0x188: map_key_clear(KEY_PRESENTATION);	break;
1162 		case 0x189: map_key_clear(KEY_DATABASE);	break;
1163 		case 0x18a: map_key_clear(KEY_MAIL);		break;
1164 		case 0x18b: map_key_clear(KEY_NEWS);		break;
1165 		case 0x18c: map_key_clear(KEY_VOICEMAIL);	break;
1166 		case 0x18d: map_key_clear(KEY_ADDRESSBOOK);	break;
1167 		case 0x18e: map_key_clear(KEY_CALENDAR);	break;
1168 		case 0x18f: map_key_clear(KEY_TASKMANAGER);	break;
1169 		case 0x190: map_key_clear(KEY_JOURNAL);		break;
1170 		case 0x191: map_key_clear(KEY_FINANCE);		break;
1171 		case 0x192: map_key_clear(KEY_CALC);		break;
1172 		case 0x193: map_key_clear(KEY_PLAYER);		break;
1173 		case 0x194: map_key_clear(KEY_FILE);		break;
1174 		case 0x196: map_key_clear(KEY_WWW);		break;
1175 		case 0x199: map_key_clear(KEY_CHAT);		break;
1176 		case 0x19c: map_key_clear(KEY_LOGOFF);		break;
1177 		case 0x19e: map_key_clear(KEY_COFFEE);		break;
1178 		case 0x19f: map_key_clear(KEY_CONTROLPANEL);		break;
1179 		case 0x1a2: map_key_clear(KEY_APPSELECT);		break;
1180 		case 0x1a3: map_key_clear(KEY_NEXT);		break;
1181 		case 0x1a4: map_key_clear(KEY_PREVIOUS);	break;
1182 		case 0x1a6: map_key_clear(KEY_HELP);		break;
1183 		case 0x1a7: map_key_clear(KEY_DOCUMENTS);	break;
1184 		case 0x1ab: map_key_clear(KEY_SPELLCHECK);	break;
1185 		case 0x1ae: map_key_clear(KEY_KEYBOARD);	break;
1186 		case 0x1b1: map_key_clear(KEY_SCREENSAVER);		break;
1187 		case 0x1b4: map_key_clear(KEY_FILE);		break;
1188 		case 0x1b6: map_key_clear(KEY_IMAGES);		break;
1189 		case 0x1b7: map_key_clear(KEY_AUDIO);		break;
1190 		case 0x1b8: map_key_clear(KEY_VIDEO);		break;
1191 		case 0x1bc: map_key_clear(KEY_MESSENGER);	break;
1192 		case 0x1bd: map_key_clear(KEY_INFO);		break;
1193 		case 0x1cb: map_key_clear(KEY_ASSISTANT);	break;
1194 		case 0x201: map_key_clear(KEY_NEW);		break;
1195 		case 0x202: map_key_clear(KEY_OPEN);		break;
1196 		case 0x203: map_key_clear(KEY_CLOSE);		break;
1197 		case 0x204: map_key_clear(KEY_EXIT);		break;
1198 		case 0x207: map_key_clear(KEY_SAVE);		break;
1199 		case 0x208: map_key_clear(KEY_PRINT);		break;
1200 		case 0x209: map_key_clear(KEY_PROPS);		break;
1201 		case 0x21a: map_key_clear(KEY_UNDO);		break;
1202 		case 0x21b: map_key_clear(KEY_COPY);		break;
1203 		case 0x21c: map_key_clear(KEY_CUT);		break;
1204 		case 0x21d: map_key_clear(KEY_PASTE);		break;
1205 		case 0x21f: map_key_clear(KEY_FIND);		break;
1206 		case 0x221: map_key_clear(KEY_SEARCH);		break;
1207 		case 0x222: map_key_clear(KEY_GOTO);		break;
1208 		case 0x223: map_key_clear(KEY_HOMEPAGE);	break;
1209 		case 0x224: map_key_clear(KEY_BACK);		break;
1210 		case 0x225: map_key_clear(KEY_FORWARD);		break;
1211 		case 0x226: map_key_clear(KEY_STOP);		break;
1212 		case 0x227: map_key_clear(KEY_REFRESH);		break;
1213 		case 0x22a: map_key_clear(KEY_BOOKMARKS);	break;
1214 		case 0x22d: map_key_clear(KEY_ZOOMIN);		break;
1215 		case 0x22e: map_key_clear(KEY_ZOOMOUT);		break;
1216 		case 0x22f: map_key_clear(KEY_ZOOMRESET);	break;
1217 		case 0x232: map_key_clear(KEY_FULL_SCREEN);	break;
1218 		case 0x233: map_key_clear(KEY_SCROLLUP);	break;
1219 		case 0x234: map_key_clear(KEY_SCROLLDOWN);	break;
1220 		case 0x238: /* AC Pan */
1221 			set_bit(REL_HWHEEL, input->relbit);
1222 			map_rel(REL_HWHEEL_HI_RES);
1223 			break;
1224 		case 0x23d: map_key_clear(KEY_EDIT);		break;
1225 		case 0x25f: map_key_clear(KEY_CANCEL);		break;
1226 		case 0x269: map_key_clear(KEY_INSERT);		break;
1227 		case 0x26a: map_key_clear(KEY_DELETE);		break;
1228 		case 0x279: map_key_clear(KEY_REDO);		break;
1229 
1230 		case 0x289: map_key_clear(KEY_REPLY);		break;
1231 		case 0x28b: map_key_clear(KEY_FORWARDMAIL);	break;
1232 		case 0x28c: map_key_clear(KEY_SEND);		break;
1233 
1234 		case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT);	break;
1235 
1236 		case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);	break;
1237 
1238 		case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);		break;
1239 		case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);		break;
1240 		case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);		break;
1241 		case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);		break;
1242 		case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);	break;
1243 		case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);	break;
1244 
1245 		case 0x29f: map_key_clear(KEY_SCALE);		break;
1246 
1247 		default: map_key_clear(KEY_UNKNOWN);
1248 		}
1249 		break;
1250 
1251 	case HID_UP_GENDEVCTRLS:
1252 		switch (usage->hid) {
1253 		case HID_DC_BATTERYSTRENGTH:
1254 			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1255 			usage->type = EV_PWR;
1256 			return;
1257 		}
1258 		goto unknown;
1259 
1260 	case HID_UP_BATTERY:
1261 		switch (usage->hid) {
1262 		case HID_BAT_ABSOLUTESTATEOFCHARGE:
1263 			hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1264 			usage->type = EV_PWR;
1265 			return;
1266 		case HID_BAT_CHARGING:
1267 			usage->type = EV_PWR;
1268 			return;
1269 		}
1270 		goto unknown;
1271 	case HID_UP_CAMERA:
1272 		switch (usage->hid & HID_USAGE) {
1273 		case 0x020:
1274 			map_key_clear(KEY_CAMERA_FOCUS);	break;
1275 		case 0x021:
1276 			map_key_clear(KEY_CAMERA);		break;
1277 		default:
1278 			goto ignore;
1279 		}
1280 		break;
1281 
1282 	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
1283 		set_bit(EV_REP, input->evbit);
1284 		switch (usage->hid & HID_USAGE) {
1285 		case 0x021: map_key_clear(KEY_PRINT);           break;
1286 		case 0x070: map_key_clear(KEY_HP);		break;
1287 		case 0x071: map_key_clear(KEY_CAMERA);		break;
1288 		case 0x072: map_key_clear(KEY_SOUND);		break;
1289 		case 0x073: map_key_clear(KEY_QUESTION);	break;
1290 		case 0x080: map_key_clear(KEY_EMAIL);		break;
1291 		case 0x081: map_key_clear(KEY_CHAT);		break;
1292 		case 0x082: map_key_clear(KEY_SEARCH);		break;
1293 		case 0x083: map_key_clear(KEY_CONNECT);	        break;
1294 		case 0x084: map_key_clear(KEY_FINANCE);		break;
1295 		case 0x085: map_key_clear(KEY_SPORT);		break;
1296 		case 0x086: map_key_clear(KEY_SHOP);	        break;
1297 		default:    goto ignore;
1298 		}
1299 		break;
1300 
1301 	case HID_UP_HPVENDOR2:
1302 		set_bit(EV_REP, input->evbit);
1303 		switch (usage->hid & HID_USAGE) {
1304 		case 0x001: map_key_clear(KEY_MICMUTE);		break;
1305 		case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);	break;
1306 		case 0x004: map_key_clear(KEY_BRIGHTNESSUP);	break;
1307 		default:    goto ignore;
1308 		}
1309 		break;
1310 
1311 	case HID_UP_MSVENDOR:
1312 		goto ignore;
1313 
1314 	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1315 		set_bit(EV_REP, input->evbit);
1316 		goto ignore;
1317 
1318 	case HID_UP_LOGIVENDOR:
1319 		/* intentional fallback */
1320 	case HID_UP_LOGIVENDOR2:
1321 		/* intentional fallback */
1322 	case HID_UP_LOGIVENDOR3:
1323 		goto ignore;
1324 
1325 	case HID_UP_PID:
1326 		switch (usage->hid & HID_USAGE) {
1327 		case 0xa4: map_key_clear(BTN_DEAD);	break;
1328 		default: goto ignore;
1329 		}
1330 		break;
1331 
1332 	default:
1333 	unknown:
1334 		if (field->report_size == 1) {
1335 			if (field->report->type == HID_OUTPUT_REPORT) {
1336 				map_led(LED_MISC);
1337 				break;
1338 			}
1339 			map_key(BTN_MISC);
1340 			break;
1341 		}
1342 		if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1343 			map_rel(REL_MISC);
1344 			break;
1345 		}
1346 		map_abs(ABS_MISC);
1347 		break;
1348 	}
1349 
1350 mapped:
1351 	/* Mapping failed, bail out */
1352 	if (!bit)
1353 		return;
1354 
1355 	if (device->driver->input_mapped &&
1356 	    device->driver->input_mapped(device, hidinput, field, usage,
1357 					 &bit, &max) < 0) {
1358 		/*
1359 		 * The driver indicated that no further generic handling
1360 		 * of the usage is desired.
1361 		 */
1362 		return;
1363 	}
1364 
1365 	set_bit(usage->type, input->evbit);
1366 
1367 	/*
1368 	 * This part is *really* controversial:
1369 	 * - HID aims at being generic so we should do our best to export
1370 	 *   all incoming events
1371 	 * - HID describes what events are, so there is no reason for ABS_X
1372 	 *   to be mapped to ABS_Y
1373 	 * - HID is using *_MISC+N as a default value, but nothing prevents
1374 	 *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1375 	 *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1376 	 *   processing)
1377 	 *
1378 	 * If devices still want to use this (at their own risk), they will
1379 	 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1380 	 * the default should be a reliable mapping.
1381 	 */
1382 	while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1383 		if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1384 			usage->code = find_next_zero_bit(bit,
1385 							 max + 1,
1386 							 usage->code);
1387 		} else {
1388 			device->status |= HID_STAT_DUP_DETECTED;
1389 			goto ignore;
1390 		}
1391 	}
1392 
1393 	if (usage->code > max)
1394 		goto ignore;
1395 
1396 	if (usage->type == EV_ABS) {
1397 
1398 		int a = field->logical_minimum;
1399 		int b = field->logical_maximum;
1400 
1401 		if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1402 			a = field->logical_minimum = 0;
1403 			b = field->logical_maximum = 255;
1404 		}
1405 
1406 		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1407 			input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1408 		else	input_set_abs_params(input, usage->code, a, b, 0, 0);
1409 
1410 		input_abs_set_res(input, usage->code,
1411 				  hidinput_calc_abs_res(field, usage->code));
1412 
1413 		/* use a larger default input buffer for MT devices */
1414 		if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1415 			input_set_events_per_packet(input, 60);
1416 	}
1417 
1418 	if (usage->type == EV_ABS &&
1419 	    (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1420 		int i;
1421 		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1422 			input_set_abs_params(input, i, -1, 1, 0, 0);
1423 			set_bit(i, input->absbit);
1424 		}
1425 		if (usage->hat_dir && !field->dpad)
1426 			field->dpad = usage->code;
1427 	}
1428 
1429 	/* for those devices which produce Consumer volume usage as relative,
1430 	 * we emulate pressing volumeup/volumedown appropriate number of times
1431 	 * in hidinput_hid_event()
1432 	 */
1433 	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1434 			(usage->code == ABS_VOLUME)) {
1435 		set_bit(KEY_VOLUMEUP, input->keybit);
1436 		set_bit(KEY_VOLUMEDOWN, input->keybit);
1437 	}
1438 
1439 	if (usage->type == EV_KEY) {
1440 		set_bit(EV_MSC, input->evbit);
1441 		set_bit(MSC_SCAN, input->mscbit);
1442 	}
1443 
1444 	return;
1445 
1446 ignore:
1447 	usage->type = 0;
1448 	usage->code = 0;
1449 }
1450 
1451 static void hidinput_handle_scroll(struct hid_usage *usage,
1452 				   struct input_dev *input,
1453 				   __s32 value)
1454 {
1455 	int code;
1456 	int hi_res, lo_res;
1457 
1458 	if (value == 0)
1459 		return;
1460 
1461 	if (usage->code == REL_WHEEL_HI_RES)
1462 		code = REL_WHEEL;
1463 	else
1464 		code = REL_HWHEEL;
1465 
1466 	/*
1467 	 * Windows reports one wheel click as value 120. Where a high-res
1468 	 * scroll wheel is present, a fraction of 120 is reported instead.
1469 	 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1470 	 * adhere to the 120 expectation.
1471 	 */
1472 	hi_res = value * 120/usage->resolution_multiplier;
1473 
1474 	usage->wheel_accumulated += hi_res;
1475 	lo_res = usage->wheel_accumulated/120;
1476 	if (lo_res)
1477 		usage->wheel_accumulated -= lo_res * 120;
1478 
1479 	input_event(input, EV_REL, code, lo_res);
1480 	input_event(input, EV_REL, usage->code, hi_res);
1481 }
1482 
1483 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1484 				    unsigned int tool)
1485 {
1486 	/* if the given tool is not currently reported, ignore */
1487 	if (!test_bit(tool, input->key))
1488 		return;
1489 
1490 	/*
1491 	 * if the given tool was previously set, release it,
1492 	 * release any TOUCH and send an EV_SYN
1493 	 */
1494 	input_event(input, EV_KEY, BTN_TOUCH, 0);
1495 	input_event(input, EV_KEY, tool, 0);
1496 	input_event(input, EV_SYN, SYN_REPORT, 0);
1497 
1498 	report->tool = 0;
1499 }
1500 
1501 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1502 				unsigned int new_tool)
1503 {
1504 	if (report->tool != new_tool)
1505 		hid_report_release_tool(report, input, report->tool);
1506 
1507 	input_event(input, EV_KEY, new_tool, 1);
1508 	report->tool = new_tool;
1509 }
1510 
1511 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1512 {
1513 	struct input_dev *input;
1514 	struct hid_report *report = field->report;
1515 	unsigned *quirks = &hid->quirks;
1516 
1517 	if (!usage->type)
1518 		return;
1519 
1520 	if (usage->type == EV_PWR) {
1521 		bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1522 
1523 		if (!handled)
1524 			hidinput_update_battery(hid, value);
1525 
1526 		return;
1527 	}
1528 
1529 	if (!field->hidinput)
1530 		return;
1531 
1532 	input = field->hidinput->input;
1533 
1534 	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1535 		int hat_dir = usage->hat_dir;
1536 		if (!hat_dir)
1537 			hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1538 		if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1539 		input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1540 		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1541 		return;
1542 	}
1543 
1544 	/*
1545 	 * Ignore out-of-range values as per HID specification,
1546 	 * section 5.10 and 6.2.25, when NULL state bit is present.
1547 	 * When it's not, clamp the value to match Microsoft's input
1548 	 * driver as mentioned in "Required HID usages for digitizers":
1549 	 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1550 	 *
1551 	 * The logical_minimum < logical_maximum check is done so that we
1552 	 * don't unintentionally discard values sent by devices which
1553 	 * don't specify logical min and max.
1554 	 */
1555 	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1556 	    field->logical_minimum < field->logical_maximum) {
1557 		if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1558 		    (value < field->logical_minimum ||
1559 		     value > field->logical_maximum)) {
1560 			dbg_hid("Ignoring out-of-range value %x\n", value);
1561 			return;
1562 		}
1563 		value = clamp(value,
1564 			      field->logical_minimum,
1565 			      field->logical_maximum);
1566 	}
1567 
1568 	switch (usage->hid) {
1569 	case HID_DG_ERASER:
1570 		report->tool_active |= !!value;
1571 
1572 		/*
1573 		 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1574 		 * to accommodate for devices not following the spec.
1575 		 */
1576 		if (value)
1577 			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1578 		else if (report->tool != BTN_TOOL_RUBBER)
1579 			/* value is off, tool is not rubber, ignore */
1580 			return;
1581 		else if (*quirks & HID_QUIRK_NOINVERT &&
1582 			 !test_bit(BTN_TOUCH, input->key)) {
1583 			/*
1584 			 * There is no invert to release the tool, let hid_input
1585 			 * send BTN_TOUCH with scancode and release the tool after.
1586 			 */
1587 			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1588 			return;
1589 		}
1590 
1591 		/* let hid-input set BTN_TOUCH */
1592 		break;
1593 
1594 	case HID_DG_INVERT:
1595 		report->tool_active |= !!value;
1596 
1597 		/*
1598 		 * If invert is set, we store BTN_TOOL_RUBBER.
1599 		 */
1600 		if (value)
1601 			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1602 		else if (!report->tool_active)
1603 			/* tool_active not set means Invert and Eraser are not set */
1604 			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1605 
1606 		/* no further processing */
1607 		return;
1608 
1609 	case HID_DG_INRANGE:
1610 		report->tool_active |= !!value;
1611 
1612 		if (report->tool_active) {
1613 			/*
1614 			 * if tool is not set but is marked as active,
1615 			 * assume ours
1616 			 */
1617 			if (!report->tool)
1618 				report->tool = usage->code;
1619 
1620 			/* drivers may have changed the value behind our back, resend it */
1621 			hid_report_set_tool(report, input, report->tool);
1622 		} else {
1623 			hid_report_release_tool(report, input, usage->code);
1624 		}
1625 
1626 		/* reset tool_active for the next event */
1627 		report->tool_active = false;
1628 
1629 		/* no further processing */
1630 		return;
1631 
1632 	case HID_DG_TIPSWITCH:
1633 		report->tool_active |= !!value;
1634 
1635 		/* if tool is set to RUBBER we should ignore the current value */
1636 		if (report->tool == BTN_TOOL_RUBBER)
1637 			return;
1638 
1639 		break;
1640 
1641 	case HID_DG_TIPPRESSURE:
1642 		if (*quirks & HID_QUIRK_NOTOUCH) {
1643 			int a = field->logical_minimum;
1644 			int b = field->logical_maximum;
1645 
1646 			if (value > a + ((b - a) >> 3)) {
1647 				input_event(input, EV_KEY, BTN_TOUCH, 1);
1648 				report->tool_active = true;
1649 			}
1650 		}
1651 		break;
1652 
1653 	case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1654 		dbg_hid("Maximum Effects - %d\n",value);
1655 		return;
1656 
1657 	case HID_UP_PID | 0x7fUL:
1658 		dbg_hid("PID Pool Report\n");
1659 		return;
1660 	}
1661 
1662 	switch (usage->type) {
1663 	case EV_KEY:
1664 		if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1665 			return;
1666 		break;
1667 
1668 	case EV_REL:
1669 		if (usage->code == REL_WHEEL_HI_RES ||
1670 		    usage->code == REL_HWHEEL_HI_RES) {
1671 			hidinput_handle_scroll(usage, input, value);
1672 			return;
1673 		}
1674 		break;
1675 
1676 	case EV_ABS:
1677 		if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1678 		    usage->code == ABS_VOLUME) {
1679 			int count = abs(value);
1680 			int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1681 			int i;
1682 
1683 			for (i = 0; i < count; i++) {
1684 				input_event(input, EV_KEY, direction, 1);
1685 				input_sync(input);
1686 				input_event(input, EV_KEY, direction, 0);
1687 				input_sync(input);
1688 			}
1689 			return;
1690 
1691 		} else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1692 			   ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1693 			value = field->logical_maximum - value;
1694 		break;
1695 	}
1696 
1697 	/*
1698 	 * Ignore reports for absolute data if the data didn't change. This is
1699 	 * not only an optimization but also fixes 'dead' key reports. Some
1700 	 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1701 	 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1702 	 * can only have one of them physically available. The 'dead' keys
1703 	 * report constant 0. As all map to the same keycode, they'd confuse
1704 	 * the input layer. If we filter the 'dead' keys on the HID level, we
1705 	 * skip the keycode translation and only forward real events.
1706 	 */
1707 	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1708 	                      HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1709 			      (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1710 	    usage->usage_index < field->maxusage &&
1711 	    value == field->value[usage->usage_index])
1712 		return;
1713 
1714 	/* report the usage code as scancode if the key status has changed */
1715 	if (usage->type == EV_KEY &&
1716 	    (!test_bit(usage->code, input->key)) == value)
1717 		input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1718 
1719 	input_event(input, usage->type, usage->code, value);
1720 
1721 	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1722 	    usage->type == EV_KEY && value) {
1723 		input_sync(input);
1724 		input_event(input, usage->type, usage->code, 0);
1725 	}
1726 }
1727 
1728 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1729 {
1730 	struct hid_input *hidinput;
1731 
1732 	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1733 		return;
1734 
1735 	list_for_each_entry(hidinput, &hid->inputs, list)
1736 		input_sync(hidinput->input);
1737 }
1738 EXPORT_SYMBOL_GPL(hidinput_report_event);
1739 
1740 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1741 			       unsigned int code, struct hid_field **field)
1742 {
1743 	struct hid_report *report;
1744 	int i, j;
1745 
1746 	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1747 		for (i = 0; i < report->maxfield; i++) {
1748 			*field = report->field[i];
1749 			for (j = 0; j < (*field)->maxusage; j++)
1750 				if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1751 					return j;
1752 		}
1753 	}
1754 	return -1;
1755 }
1756 
1757 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1758 {
1759 	struct hid_report *report;
1760 	struct hid_field *field;
1761 	int i, j;
1762 
1763 	list_for_each_entry(report,
1764 			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1765 			    list) {
1766 		for (i = 0; i < report->maxfield; i++) {
1767 			field = report->field[i];
1768 			for (j = 0; j < field->maxusage; j++)
1769 				if (field->usage[j].type == EV_LED)
1770 					return field;
1771 		}
1772 	}
1773 	return NULL;
1774 }
1775 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1776 
1777 unsigned int hidinput_count_leds(struct hid_device *hid)
1778 {
1779 	struct hid_report *report;
1780 	struct hid_field *field;
1781 	int i, j;
1782 	unsigned int count = 0;
1783 
1784 	list_for_each_entry(report,
1785 			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1786 			    list) {
1787 		for (i = 0; i < report->maxfield; i++) {
1788 			field = report->field[i];
1789 			for (j = 0; j < field->maxusage; j++)
1790 				if (field->usage[j].type == EV_LED &&
1791 				    field->value[j])
1792 					count += 1;
1793 		}
1794 	}
1795 	return count;
1796 }
1797 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1798 
1799 static void hidinput_led_worker(struct work_struct *work)
1800 {
1801 	struct hid_device *hid = container_of(work, struct hid_device,
1802 					      led_work);
1803 	struct hid_field *field;
1804 	struct hid_report *report;
1805 	int ret;
1806 	u32 len;
1807 	__u8 *buf;
1808 
1809 	field = hidinput_get_led_field(hid);
1810 	if (!field)
1811 		return;
1812 
1813 	/*
1814 	 * field->report is accessed unlocked regarding HID core. So there might
1815 	 * be another incoming SET-LED request from user-space, which changes
1816 	 * the LED state while we assemble our outgoing buffer. However, this
1817 	 * doesn't matter as hid_output_report() correctly converts it into a
1818 	 * boolean value no matter what information is currently set on the LED
1819 	 * field (even garbage). So the remote device will always get a valid
1820 	 * request.
1821 	 * And in case we send a wrong value, a next led worker is spawned
1822 	 * for every SET-LED request so the following worker will send the
1823 	 * correct value, guaranteed!
1824 	 */
1825 
1826 	report = field->report;
1827 
1828 	/* use custom SET_REPORT request if possible (asynchronous) */
1829 	if (hid->ll_driver->request)
1830 		return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1831 
1832 	/* fall back to generic raw-output-report */
1833 	len = hid_report_len(report);
1834 	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1835 	if (!buf)
1836 		return;
1837 
1838 	hid_output_report(report, buf);
1839 	/* synchronous output report */
1840 	ret = hid_hw_output_report(hid, buf, len);
1841 	if (ret == -ENOSYS)
1842 		hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1843 				HID_REQ_SET_REPORT);
1844 	kfree(buf);
1845 }
1846 
1847 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1848 				unsigned int code, int value)
1849 {
1850 	struct hid_device *hid = input_get_drvdata(dev);
1851 	struct hid_field *field;
1852 	int offset;
1853 
1854 	if (type == EV_FF)
1855 		return input_ff_event(dev, type, code, value);
1856 
1857 	if (type != EV_LED)
1858 		return -1;
1859 
1860 	if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1861 		hid_warn(dev, "event field not found\n");
1862 		return -1;
1863 	}
1864 
1865 	hid_set_field(field, offset, value);
1866 
1867 	schedule_work(&hid->led_work);
1868 	return 0;
1869 }
1870 
1871 static int hidinput_open(struct input_dev *dev)
1872 {
1873 	struct hid_device *hid = input_get_drvdata(dev);
1874 
1875 	return hid_hw_open(hid);
1876 }
1877 
1878 static void hidinput_close(struct input_dev *dev)
1879 {
1880 	struct hid_device *hid = input_get_drvdata(dev);
1881 
1882 	hid_hw_close(hid);
1883 }
1884 
1885 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1886 		struct hid_report *report, bool use_logical_max)
1887 {
1888 	struct hid_usage *usage;
1889 	bool update_needed = false;
1890 	bool get_report_completed = false;
1891 	int i, j;
1892 
1893 	if (report->maxfield == 0)
1894 		return false;
1895 
1896 	for (i = 0; i < report->maxfield; i++) {
1897 		__s32 value = use_logical_max ?
1898 			      report->field[i]->logical_maximum :
1899 			      report->field[i]->logical_minimum;
1900 
1901 		/* There is no good reason for a Resolution
1902 		 * Multiplier to have a count other than 1.
1903 		 * Ignore that case.
1904 		 */
1905 		if (report->field[i]->report_count != 1)
1906 			continue;
1907 
1908 		for (j = 0; j < report->field[i]->maxusage; j++) {
1909 			usage = &report->field[i]->usage[j];
1910 
1911 			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1912 				continue;
1913 
1914 			/*
1915 			 * If we have more than one feature within this
1916 			 * report we need to fill in the bits from the
1917 			 * others before we can overwrite the ones for the
1918 			 * Resolution Multiplier.
1919 			 *
1920 			 * But if we're not allowed to read from the device,
1921 			 * we just bail. Such a device should not exist
1922 			 * anyway.
1923 			 */
1924 			if (!get_report_completed && report->maxfield > 1) {
1925 				if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1926 					return update_needed;
1927 
1928 				hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1929 				hid_hw_wait(hid);
1930 				get_report_completed = true;
1931 			}
1932 
1933 			report->field[i]->value[j] = value;
1934 			update_needed = true;
1935 		}
1936 	}
1937 
1938 	return update_needed;
1939 }
1940 
1941 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1942 {
1943 	struct hid_report_enum *rep_enum;
1944 	struct hid_report *rep;
1945 	int ret;
1946 
1947 	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1948 	list_for_each_entry(rep, &rep_enum->report_list, list) {
1949 		bool update_needed = __hidinput_change_resolution_multipliers(hid,
1950 								     rep, true);
1951 
1952 		if (update_needed) {
1953 			ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1954 			if (ret) {
1955 				__hidinput_change_resolution_multipliers(hid,
1956 								    rep, false);
1957 				return;
1958 			}
1959 		}
1960 	}
1961 
1962 	/* refresh our structs */
1963 	hid_setup_resolution_multiplier(hid);
1964 }
1965 
1966 static void report_features(struct hid_device *hid)
1967 {
1968 	struct hid_driver *drv = hid->driver;
1969 	struct hid_report_enum *rep_enum;
1970 	struct hid_report *rep;
1971 	struct hid_usage *usage;
1972 	int i, j;
1973 
1974 	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1975 	list_for_each_entry(rep, &rep_enum->report_list, list)
1976 		for (i = 0; i < rep->maxfield; i++) {
1977 			/* Ignore if report count is out of bounds. */
1978 			if (rep->field[i]->report_count < 1)
1979 				continue;
1980 
1981 			for (j = 0; j < rep->field[i]->maxusage; j++) {
1982 				usage = &rep->field[i]->usage[j];
1983 
1984 				/* Verify if Battery Strength feature is available */
1985 				if (usage->hid == HID_DC_BATTERYSTRENGTH)
1986 					hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1987 							       rep->field[i], false);
1988 
1989 				if (drv->feature_mapping)
1990 					drv->feature_mapping(hid, rep->field[i], usage);
1991 			}
1992 		}
1993 }
1994 
1995 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1996 					   unsigned int application)
1997 {
1998 	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1999 	struct input_dev *input_dev = input_allocate_device();
2000 	const char *suffix = NULL;
2001 	size_t suffix_len, name_len;
2002 
2003 	if (!hidinput || !input_dev)
2004 		goto fail;
2005 
2006 	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2007 	    hid->maxapplication > 1) {
2008 		switch (application) {
2009 		case HID_GD_KEYBOARD:
2010 			suffix = "Keyboard";
2011 			break;
2012 		case HID_GD_KEYPAD:
2013 			suffix = "Keypad";
2014 			break;
2015 		case HID_GD_MOUSE:
2016 			suffix = "Mouse";
2017 			break;
2018 		case HID_DG_PEN:
2019 			/*
2020 			 * yes, there is an issue here:
2021 			 *  DG_PEN -> "Stylus"
2022 			 *  DG_STYLUS -> "Pen"
2023 			 * But changing this now means users with config snippets
2024 			 * will have to change it and the test suite will not be happy.
2025 			 */
2026 			suffix = "Stylus";
2027 			break;
2028 		case HID_DG_STYLUS:
2029 			suffix = "Pen";
2030 			break;
2031 		case HID_DG_TOUCHSCREEN:
2032 			suffix = "Touchscreen";
2033 			break;
2034 		case HID_DG_TOUCHPAD:
2035 			suffix = "Touchpad";
2036 			break;
2037 		case HID_GD_SYSTEM_CONTROL:
2038 			suffix = "System Control";
2039 			break;
2040 		case HID_CP_CONSUMER_CONTROL:
2041 			suffix = "Consumer Control";
2042 			break;
2043 		case HID_GD_WIRELESS_RADIO_CTLS:
2044 			suffix = "Wireless Radio Control";
2045 			break;
2046 		case HID_GD_SYSTEM_MULTIAXIS:
2047 			suffix = "System Multi Axis";
2048 			break;
2049 		default:
2050 			break;
2051 		}
2052 	}
2053 
2054 	if (suffix) {
2055 		name_len = strlen(hid->name);
2056 		suffix_len = strlen(suffix);
2057 		if ((name_len < suffix_len) ||
2058 		    strcmp(hid->name + name_len - suffix_len, suffix)) {
2059 			hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2060 						   hid->name, suffix);
2061 			if (!hidinput->name)
2062 				goto fail;
2063 		}
2064 	}
2065 
2066 	input_set_drvdata(input_dev, hid);
2067 	input_dev->event = hidinput_input_event;
2068 	input_dev->open = hidinput_open;
2069 	input_dev->close = hidinput_close;
2070 	input_dev->setkeycode = hidinput_setkeycode;
2071 	input_dev->getkeycode = hidinput_getkeycode;
2072 
2073 	input_dev->name = hidinput->name ? hidinput->name : hid->name;
2074 	input_dev->phys = hid->phys;
2075 	input_dev->uniq = hid->uniq;
2076 	input_dev->id.bustype = hid->bus;
2077 	input_dev->id.vendor  = hid->vendor;
2078 	input_dev->id.product = hid->product;
2079 	input_dev->id.version = hid->version;
2080 	input_dev->dev.parent = &hid->dev;
2081 
2082 	hidinput->input = input_dev;
2083 	hidinput->application = application;
2084 	list_add_tail(&hidinput->list, &hid->inputs);
2085 
2086 	INIT_LIST_HEAD(&hidinput->reports);
2087 
2088 	return hidinput;
2089 
2090 fail:
2091 	kfree(hidinput);
2092 	input_free_device(input_dev);
2093 	hid_err(hid, "Out of memory during hid input probe\n");
2094 	return NULL;
2095 }
2096 
2097 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2098 {
2099 	int i;
2100 	unsigned long r = 0;
2101 
2102 	for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2103 		r |= hidinput->input->evbit[i];
2104 
2105 	for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2106 		r |= hidinput->input->keybit[i];
2107 
2108 	for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2109 		r |= hidinput->input->relbit[i];
2110 
2111 	for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2112 		r |= hidinput->input->absbit[i];
2113 
2114 	for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2115 		r |= hidinput->input->mscbit[i];
2116 
2117 	for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2118 		r |= hidinput->input->ledbit[i];
2119 
2120 	for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2121 		r |= hidinput->input->sndbit[i];
2122 
2123 	for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2124 		r |= hidinput->input->ffbit[i];
2125 
2126 	for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2127 		r |= hidinput->input->swbit[i];
2128 
2129 	return !!r;
2130 }
2131 
2132 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2133 		struct hid_input *hidinput)
2134 {
2135 	struct hid_report *report;
2136 	int i, k;
2137 
2138 	list_del(&hidinput->list);
2139 	input_free_device(hidinput->input);
2140 	kfree(hidinput->name);
2141 
2142 	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2143 		if (k == HID_OUTPUT_REPORT &&
2144 			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2145 			continue;
2146 
2147 		list_for_each_entry(report, &hid->report_enum[k].report_list,
2148 				    list) {
2149 
2150 			for (i = 0; i < report->maxfield; i++)
2151 				if (report->field[i]->hidinput == hidinput)
2152 					report->field[i]->hidinput = NULL;
2153 		}
2154 	}
2155 
2156 	kfree(hidinput);
2157 }
2158 
2159 static struct hid_input *hidinput_match(struct hid_report *report)
2160 {
2161 	struct hid_device *hid = report->device;
2162 	struct hid_input *hidinput;
2163 
2164 	list_for_each_entry(hidinput, &hid->inputs, list) {
2165 		if (hidinput->report &&
2166 		    hidinput->report->id == report->id)
2167 			return hidinput;
2168 	}
2169 
2170 	return NULL;
2171 }
2172 
2173 static struct hid_input *hidinput_match_application(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->application == report->application)
2180 			return hidinput;
2181 
2182 		/*
2183 		 * Keep SystemControl and ConsumerControl applications together
2184 		 * with the main keyboard, if present.
2185 		 */
2186 		if ((report->application == HID_GD_SYSTEM_CONTROL ||
2187 		     report->application == HID_CP_CONSUMER_CONTROL) &&
2188 		    hidinput->application == HID_GD_KEYBOARD) {
2189 			return hidinput;
2190 		}
2191 	}
2192 
2193 	return NULL;
2194 }
2195 
2196 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2197 					     struct hid_report *report)
2198 {
2199 	int i, j, k;
2200 	int first_field_index = 0;
2201 	int slot_collection_index = -1;
2202 	int prev_collection_index = -1;
2203 	unsigned int slot_idx = 0;
2204 	struct hid_field *field;
2205 
2206 	/*
2207 	 * First tag all the fields that are part of a slot,
2208 	 * a slot needs to have one Contact ID in the collection
2209 	 */
2210 	for (i = 0; i < report->maxfield; i++) {
2211 		field = report->field[i];
2212 
2213 		/* ignore fields without usage */
2214 		if (field->maxusage < 1)
2215 			continue;
2216 
2217 		/*
2218 		 * janitoring when collection_index changes
2219 		 */
2220 		if (prev_collection_index != field->usage->collection_index) {
2221 			prev_collection_index = field->usage->collection_index;
2222 			first_field_index = i;
2223 		}
2224 
2225 		/*
2226 		 * if we already found a Contact ID in the collection,
2227 		 * tag and continue to the next.
2228 		 */
2229 		if (slot_collection_index == field->usage->collection_index) {
2230 			field->slot_idx = slot_idx;
2231 			continue;
2232 		}
2233 
2234 		/* check if the current field has Contact ID */
2235 		for (j = 0; j < field->maxusage; j++) {
2236 			if (field->usage[j].hid == HID_DG_CONTACTID) {
2237 				slot_collection_index = field->usage->collection_index;
2238 				slot_idx++;
2239 
2240 				/*
2241 				 * mark all previous fields and this one in the
2242 				 * current collection to be slotted.
2243 				 */
2244 				for (k = first_field_index; k <= i; k++)
2245 					report->field[k]->slot_idx = slot_idx;
2246 				break;
2247 			}
2248 		}
2249 	}
2250 
2251 	for (i = 0; i < report->maxfield; i++)
2252 		for (j = 0; j < report->field[i]->maxusage; j++)
2253 			hidinput_configure_usage(hidinput, report->field[i],
2254 						 report->field[i]->usage + j,
2255 						 j);
2256 }
2257 
2258 /*
2259  * Register the input device; print a message.
2260  * Configure the input layer interface
2261  * Read all reports and initialize the absolute field values.
2262  */
2263 
2264 int hidinput_connect(struct hid_device *hid, unsigned int force)
2265 {
2266 	struct hid_driver *drv = hid->driver;
2267 	struct hid_report *report;
2268 	struct hid_input *next, *hidinput = NULL;
2269 	unsigned int application;
2270 	int i, k;
2271 
2272 	INIT_LIST_HEAD(&hid->inputs);
2273 	INIT_WORK(&hid->led_work, hidinput_led_worker);
2274 
2275 	hid->status &= ~HID_STAT_DUP_DETECTED;
2276 
2277 	if (!force) {
2278 		for (i = 0; i < hid->maxcollection; i++) {
2279 			struct hid_collection *col = &hid->collection[i];
2280 			if (col->type == HID_COLLECTION_APPLICATION ||
2281 					col->type == HID_COLLECTION_PHYSICAL)
2282 				if (IS_INPUT_APPLICATION(col->usage))
2283 					break;
2284 		}
2285 
2286 		if (i == hid->maxcollection)
2287 			return -1;
2288 	}
2289 
2290 	report_features(hid);
2291 
2292 	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2293 		if (k == HID_OUTPUT_REPORT &&
2294 			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2295 			continue;
2296 
2297 		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2298 
2299 			if (!report->maxfield)
2300 				continue;
2301 
2302 			application = report->application;
2303 
2304 			/*
2305 			 * Find the previous hidinput report attached
2306 			 * to this report id.
2307 			 */
2308 			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2309 				hidinput = hidinput_match(report);
2310 			else if (hid->maxapplication > 1 &&
2311 				 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2312 				hidinput = hidinput_match_application(report);
2313 
2314 			if (!hidinput) {
2315 				hidinput = hidinput_allocate(hid, application);
2316 				if (!hidinput)
2317 					goto out_unwind;
2318 			}
2319 
2320 			hidinput_configure_usages(hidinput, report);
2321 
2322 			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2323 				hidinput->report = report;
2324 
2325 			list_add_tail(&report->hidinput_list,
2326 				      &hidinput->reports);
2327 		}
2328 	}
2329 
2330 	hidinput_change_resolution_multipliers(hid);
2331 
2332 	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2333 		if (drv->input_configured &&
2334 		    drv->input_configured(hid, hidinput))
2335 			goto out_unwind;
2336 
2337 		if (!hidinput_has_been_populated(hidinput)) {
2338 			/* no need to register an input device not populated */
2339 			hidinput_cleanup_hidinput(hid, hidinput);
2340 			continue;
2341 		}
2342 
2343 		if (input_register_device(hidinput->input))
2344 			goto out_unwind;
2345 		hidinput->registered = true;
2346 	}
2347 
2348 	if (list_empty(&hid->inputs)) {
2349 		hid_err(hid, "No inputs registered, leaving\n");
2350 		goto out_unwind;
2351 	}
2352 
2353 	if (hid->status & HID_STAT_DUP_DETECTED)
2354 		hid_dbg(hid,
2355 			"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2356 
2357 	return 0;
2358 
2359 out_unwind:
2360 	/* unwind the ones we already registered */
2361 	hidinput_disconnect(hid);
2362 
2363 	return -1;
2364 }
2365 EXPORT_SYMBOL_GPL(hidinput_connect);
2366 
2367 void hidinput_disconnect(struct hid_device *hid)
2368 {
2369 	struct hid_input *hidinput, *next;
2370 
2371 	hidinput_cleanup_battery(hid);
2372 
2373 	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2374 		list_del(&hidinput->list);
2375 		if (hidinput->registered)
2376 			input_unregister_device(hidinput->input);
2377 		else
2378 			input_free_device(hidinput->input);
2379 		kfree(hidinput->name);
2380 		kfree(hidinput);
2381 	}
2382 
2383 	/* led_work is spawned by input_dev callbacks, but doesn't access the
2384 	 * parent input_dev at all. Once all input devices are removed, we
2385 	 * know that led_work will never get restarted, so we can cancel it
2386 	 * synchronously and are safe. */
2387 	cancel_work_sync(&hid->led_work);
2388 }
2389 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2390 
2391 #ifdef CONFIG_HID_KUNIT_TEST
2392 #include "hid-input-test.c"
2393 #endif
2394