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
  27static 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
  46static 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
  51struct 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 */
  78static 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
 107static 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
 113static 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
 122static bool match_index(struct hid_usage *usage,
 123			unsigned int cur_idx, unsigned int idx)
 124{
 125	return cur_idx == idx;
 126}
 127
 128typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
 129				unsigned int cur_idx, unsigned int val);
 130
 131static 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
 160static 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
 177static 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
 198static 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}
 328EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 329
 330#ifdef CONFIG_HID_BATTERY_STRENGTH
 331static 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
 345static 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
 396static 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
 408static 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
 419static 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
 440static 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
 500static 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
 576err_free_name:
 577	kfree(psy_desc->name);
 578err_free_mem:
 579	kfree(psy_desc);
 580	dev->battery = NULL;
 581	return error;
 582}
 583
 584static 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
 598static 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
 621static 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 */
 635static 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
 641static void hidinput_cleanup_battery(struct hid_device *dev)
 642{
 643}
 644
 645static void hidinput_update_battery(struct hid_device *dev, int value)
 646{
 647}
 648
 649static 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
 656static 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
 666static 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 & D-pad */
 814			switch (usage->hid) {
 815			case HID_GD_UP:	   usage->hat_dir = 1; break;
 816			case HID_GD_DOWN:  usage->hat_dir = 5; break;
 817			case HID_GD_RIGHT: usage->hat_dir = 3; break;
 818			case HID_GD_LEFT:  usage->hat_dir = 7; break;
 819			case HID_GD_DO_NOT_DISTURB:
 820				map_key_clear(KEY_DO_NOT_DISTURB); break;
 821			default: goto unknown;
 822			}
 823
 824			if (usage->hid <= HID_GD_LEFT) {
 825				if (field->dpad) {
 826					map_abs(field->dpad);
 827					goto ignore;
 828				}
 829				map_abs(ABS_HAT0X);
 830			}
 831			break;
 832		}
 833
 834		if ((usage->hid & 0xf0) == 0xa0) {	/* SystemControl */
 835			switch (usage->hid & 0xf) {
 836			case 0x9: map_key_clear(KEY_MICMUTE); break;
 837			case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
 838			default: goto ignore;
 839			}
 840			break;
 841		}
 842
 843		if ((usage->hid & 0xf0) == 0xb0) {	/* SC - Display */
 844			switch (usage->hid & 0xf) {
 845			case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 846			default: goto ignore;
 847			}
 848			break;
 849		}
 850
 851		/*
 852		 * Some lazy vendors declare 255 usages for System Control,
 853		 * leading to the creation of ABS_X|Y axis and too many others.
 854		 * It wouldn't be a problem if joydev doesn't consider the
 855		 * device as a joystick then.
 856		 */
 857		if (field->application == HID_GD_SYSTEM_CONTROL)
 858			goto ignore;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 859
 860		switch (usage->hid) {
 861		/* These usage IDs map directly to the usage codes. */
 862		case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 863		case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 864			if (field->flags & HID_MAIN_ITEM_RELATIVE)
 865				map_rel(usage->hid & 0xf);
 866			else
 867				map_abs_clear(usage->hid & 0xf);
 868			break;
 869
 870		case HID_GD_WHEEL:
 871			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 872				set_bit(REL_WHEEL, input->relbit);
 873				map_rel(REL_WHEEL_HI_RES);
 874			} else {
 875				map_abs(usage->hid & 0xf);
 876			}
 877			break;
 878		case HID_GD_SLIDER: case HID_GD_DIAL:
 879			if (field->flags & HID_MAIN_ITEM_RELATIVE)
 880				map_rel(usage->hid & 0xf);
 881			else
 882				map_abs(usage->hid & 0xf);
 883			break;
 884
 885		case HID_GD_HATSWITCH:
 886			usage->hat_min = field->logical_minimum;
 887			usage->hat_max = field->logical_maximum;
 888			map_abs(ABS_HAT0X);
 889			break;
 890
 891		case HID_GD_START:	map_key_clear(BTN_START);	break;
 892		case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;
 893
 894		case HID_GD_RFKILL_BTN:
 895			/* MS wireless radio ctl extension, also check CA */
 896			if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 897				map_key_clear(KEY_RFKILL);
 898				/* We need to simulate the btn release */
 899				field->flags |= HID_MAIN_ITEM_RELATIVE;
 900				break;
 901			}
 902			goto unknown;
 903
 904		default: goto unknown;
 905		}
 906
 907		break;
 908
 909	case HID_UP_LED:
 910		switch (usage->hid & 0xffff) {		      /* HID-Value:                   */
 911		case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 912		case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 913		case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 914		case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 915		case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 916		case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 917		case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 918		case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 919		case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 920		case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 921		case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 922
 923		default: goto ignore;
 924		}
 925		break;
 926
 927	case HID_UP_DIGITIZER:
 928		if ((field->application & 0xff) == 0x01) /* Digitizer */
 929			__set_bit(INPUT_PROP_POINTER, input->propbit);
 930		else if ((field->application & 0xff) == 0x02) /* Pen */
 931			__set_bit(INPUT_PROP_DIRECT, input->propbit);
 932
 933		switch (usage->hid & 0xff) {
 934		case 0x00: /* Undefined */
 935			goto ignore;
 936
 937		case 0x30: /* TipPressure */
 938			if (!test_bit(BTN_TOUCH, input->keybit)) {
 939				device->quirks |= HID_QUIRK_NOTOUCH;
 940				set_bit(EV_KEY, input->evbit);
 941				set_bit(BTN_TOUCH, input->keybit);
 942			}
 943			map_abs_clear(ABS_PRESSURE);
 944			break;
 945
 946		case 0x32: /* InRange */
 947			switch (field->physical) {
 948			case HID_DG_PUCK:
 949				map_key(BTN_TOOL_MOUSE);
 950				break;
 951			case HID_DG_FINGER:
 952				map_key(BTN_TOOL_FINGER);
 953				break;
 954			default:
 955				/*
 956				 * If the physical is not given,
 957				 * rely on the application.
 958				 */
 959				if (!field->physical) {
 960					switch (field->application) {
 961					case HID_DG_TOUCHSCREEN:
 962					case HID_DG_TOUCHPAD:
 963						map_key_clear(BTN_TOOL_FINGER);
 964						break;
 965					default:
 966						map_key_clear(BTN_TOOL_PEN);
 967					}
 968				} else {
 969					map_key(BTN_TOOL_PEN);
 970				}
 971				break;
 972			}
 973			break;
 974
 975		case 0x3b: /* Battery Strength */
 976			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
 977			usage->type = EV_PWR;
 978			return;
 979
 980		case 0x3c: /* Invert */
 981			device->quirks &= ~HID_QUIRK_NOINVERT;
 982			map_key_clear(BTN_TOOL_RUBBER);
 983			break;
 984
 985		case 0x3d: /* X Tilt */
 986			map_abs_clear(ABS_TILT_X);
 987			break;
 988
 989		case 0x3e: /* Y Tilt */
 990			map_abs_clear(ABS_TILT_Y);
 991			break;
 992
 993		case 0x33: /* Touch */
 994		case 0x42: /* TipSwitch */
 995		case 0x43: /* TipSwitch2 */
 996			device->quirks &= ~HID_QUIRK_NOTOUCH;
 997			map_key_clear(BTN_TOUCH);
 998			break;
 999
1000		case 0x44: /* BarrelSwitch */
1001			map_key_clear(BTN_STYLUS);
1002			break;
1003
1004		case 0x45: /* ERASER */
1005			/*
1006			 * This event is reported when eraser tip touches the surface.
1007			 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1008			 * by Invert if tool reports proximity or by Eraser directly.
1009			 */
1010			if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1011				device->quirks |= HID_QUIRK_NOINVERT;
1012				set_bit(BTN_TOOL_RUBBER, input->keybit);
1013			}
1014			map_key_clear(BTN_TOUCH);
1015			break;
1016
1017		case 0x46: /* TabletPick */
1018		case 0x5a: /* SecondaryBarrelSwitch */
1019			map_key_clear(BTN_STYLUS2);
1020			break;
1021
1022		case 0x5b: /* TransducerSerialNumber */
1023		case 0x6e: /* TransducerSerialNumber2 */
1024			map_msc(MSC_SERIAL);
1025			break;
1026
1027		default:  goto unknown;
1028		}
1029		break;
1030
1031	case HID_UP_TELEPHONY:
1032		switch (usage->hid & HID_USAGE) {
1033		case 0x2f: map_key_clear(KEY_MICMUTE);		break;
1034		case 0xb0: map_key_clear(KEY_NUMERIC_0);	break;
1035		case 0xb1: map_key_clear(KEY_NUMERIC_1);	break;
1036		case 0xb2: map_key_clear(KEY_NUMERIC_2);	break;
1037		case 0xb3: map_key_clear(KEY_NUMERIC_3);	break;
1038		case 0xb4: map_key_clear(KEY_NUMERIC_4);	break;
1039		case 0xb5: map_key_clear(KEY_NUMERIC_5);	break;
1040		case 0xb6: map_key_clear(KEY_NUMERIC_6);	break;
1041		case 0xb7: map_key_clear(KEY_NUMERIC_7);	break;
1042		case 0xb8: map_key_clear(KEY_NUMERIC_8);	break;
1043		case 0xb9: map_key_clear(KEY_NUMERIC_9);	break;
1044		case 0xba: map_key_clear(KEY_NUMERIC_STAR);	break;
1045		case 0xbb: map_key_clear(KEY_NUMERIC_POUND);	break;
1046		case 0xbc: map_key_clear(KEY_NUMERIC_A);	break;
1047		case 0xbd: map_key_clear(KEY_NUMERIC_B);	break;
1048		case 0xbe: map_key_clear(KEY_NUMERIC_C);	break;
1049		case 0xbf: map_key_clear(KEY_NUMERIC_D);	break;
1050		default: goto ignore;
1051		}
1052		break;
1053
1054	case HID_UP_CONSUMER:	/* USB HUT v1.12, pages 75-84 */
1055		switch (usage->hid & HID_USAGE) {
1056		case 0x000: goto ignore;
1057		case 0x030: map_key_clear(KEY_POWER);		break;
1058		case 0x031: map_key_clear(KEY_RESTART);		break;
1059		case 0x032: map_key_clear(KEY_SLEEP);		break;
1060		case 0x034: map_key_clear(KEY_SLEEP);		break;
1061		case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1062		case 0x036: map_key_clear(BTN_MISC);		break;
1063
1064		case 0x040: map_key_clear(KEY_MENU);		break; /* Menu */
1065		case 0x041: map_key_clear(KEY_SELECT);		break; /* Menu Pick */
1066		case 0x042: map_key_clear(KEY_UP);		break; /* Menu Up */
1067		case 0x043: map_key_clear(KEY_DOWN);		break; /* Menu Down */
1068		case 0x044: map_key_clear(KEY_LEFT);		break; /* Menu Left */
1069		case 0x045: map_key_clear(KEY_RIGHT);		break; /* Menu Right */
1070		case 0x046: map_key_clear(KEY_ESC);		break; /* Menu Escape */
1071		case 0x047: map_key_clear(KEY_KPPLUS);		break; /* Menu Value Increase */
1072		case 0x048: map_key_clear(KEY_KPMINUS);		break; /* Menu Value Decrease */
1073
1074		case 0x060: map_key_clear(KEY_INFO);		break; /* Data On Screen */
1075		case 0x061: map_key_clear(KEY_SUBTITLE);	break; /* Closed Caption */
1076		case 0x063: map_key_clear(KEY_VCR);		break; /* VCR/TV */
1077		case 0x065: map_key_clear(KEY_CAMERA);		break; /* Snapshot */
1078		case 0x069: map_key_clear(KEY_RED);		break;
1079		case 0x06a: map_key_clear(KEY_GREEN);		break;
1080		case 0x06b: map_key_clear(KEY_BLUE);		break;
1081		case 0x06c: map_key_clear(KEY_YELLOW);		break;
1082		case 0x06d: map_key_clear(KEY_ASPECT_RATIO);	break;
1083
1084		case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);		break;
1085		case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);		break;
1086		case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);	break;
1087		case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);		break;
1088		case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);		break;
1089		case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);		break;
1090
1091		case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);	break;
1092		case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);	break;
1093		case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);	break;
1094
1095		case 0x079: map_key_clear(KEY_KBDILLUMUP);	break;
1096		case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);	break;
1097		case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1098
1099		case 0x082: map_key_clear(KEY_VIDEO_NEXT);	break;
1100		case 0x083: map_key_clear(KEY_LAST);		break;
1101		case 0x084: map_key_clear(KEY_ENTER);		break;
1102		case 0x088: map_key_clear(KEY_PC);		break;
1103		case 0x089: map_key_clear(KEY_TV);		break;
1104		case 0x08a: map_key_clear(KEY_WWW);		break;
1105		case 0x08b: map_key_clear(KEY_DVD);		break;
1106		case 0x08c: map_key_clear(KEY_PHONE);		break;
1107		case 0x08d: map_key_clear(KEY_PROGRAM);		break;
1108		case 0x08e: map_key_clear(KEY_VIDEOPHONE);	break;
1109		case 0x08f: map_key_clear(KEY_GAMES);		break;
1110		case 0x090: map_key_clear(KEY_MEMO);		break;
1111		case 0x091: map_key_clear(KEY_CD);		break;
1112		case 0x092: map_key_clear(KEY_VCR);		break;
1113		case 0x093: map_key_clear(KEY_TUNER);		break;
1114		case 0x094: map_key_clear(KEY_EXIT);		break;
1115		case 0x095: map_key_clear(KEY_HELP);		break;
1116		case 0x096: map_key_clear(KEY_TAPE);		break;
1117		case 0x097: map_key_clear(KEY_TV2);		break;
1118		case 0x098: map_key_clear(KEY_SAT);		break;
1119		case 0x09a: map_key_clear(KEY_PVR);		break;
1120
1121		case 0x09c: map_key_clear(KEY_CHANNELUP);	break;
1122		case 0x09d: map_key_clear(KEY_CHANNELDOWN);	break;
1123		case 0x0a0: map_key_clear(KEY_VCR2);		break;
1124
1125		case 0x0b0: map_key_clear(KEY_PLAY);		break;
1126		case 0x0b1: map_key_clear(KEY_PAUSE);		break;
1127		case 0x0b2: map_key_clear(KEY_RECORD);		break;
1128		case 0x0b3: map_key_clear(KEY_FASTFORWARD);	break;
1129		case 0x0b4: map_key_clear(KEY_REWIND);		break;
1130		case 0x0b5: map_key_clear(KEY_NEXTSONG);	break;
1131		case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);	break;
1132		case 0x0b7: map_key_clear(KEY_STOPCD);		break;
1133		case 0x0b8: map_key_clear(KEY_EJECTCD);		break;
1134		case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);	break;
1135		case 0x0b9: map_key_clear(KEY_SHUFFLE);		break;
1136		case 0x0bf: map_key_clear(KEY_SLOW);		break;
1137
1138		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
1139		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
1140
1141		case 0x0d8: map_key_clear(KEY_DICTATE);		break;
1142		case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);	break;
1143
1144		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
1145		case 0x0e2: map_key_clear(KEY_MUTE);		break;
1146		case 0x0e5: map_key_clear(KEY_BASSBOOST);	break;
1147		case 0x0e9: map_key_clear(KEY_VOLUMEUP);	break;
1148		case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);	break;
1149		case 0x0f5: map_key_clear(KEY_SLOW);		break;
1150
1151		case 0x181: map_key_clear(KEY_BUTTONCONFIG);	break;
1152		case 0x182: map_key_clear(KEY_BOOKMARKS);	break;
1153		case 0x183: map_key_clear(KEY_CONFIG);		break;
1154		case 0x184: map_key_clear(KEY_WORDPROCESSOR);	break;
1155		case 0x185: map_key_clear(KEY_EDITOR);		break;
1156		case 0x186: map_key_clear(KEY_SPREADSHEET);	break;
1157		case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);	break;
1158		case 0x188: map_key_clear(KEY_PRESENTATION);	break;
1159		case 0x189: map_key_clear(KEY_DATABASE);	break;
1160		case 0x18a: map_key_clear(KEY_MAIL);		break;
1161		case 0x18b: map_key_clear(KEY_NEWS);		break;
1162		case 0x18c: map_key_clear(KEY_VOICEMAIL);	break;
1163		case 0x18d: map_key_clear(KEY_ADDRESSBOOK);	break;
1164		case 0x18e: map_key_clear(KEY_CALENDAR);	break;
1165		case 0x18f: map_key_clear(KEY_TASKMANAGER);	break;
1166		case 0x190: map_key_clear(KEY_JOURNAL);		break;
1167		case 0x191: map_key_clear(KEY_FINANCE);		break;
1168		case 0x192: map_key_clear(KEY_CALC);		break;
1169		case 0x193: map_key_clear(KEY_PLAYER);		break;
1170		case 0x194: map_key_clear(KEY_FILE);		break;
1171		case 0x196: map_key_clear(KEY_WWW);		break;
1172		case 0x199: map_key_clear(KEY_CHAT);		break;
1173		case 0x19c: map_key_clear(KEY_LOGOFF);		break;
1174		case 0x19e: map_key_clear(KEY_COFFEE);		break;
1175		case 0x19f: map_key_clear(KEY_CONTROLPANEL);		break;
1176		case 0x1a2: map_key_clear(KEY_APPSELECT);		break;
1177		case 0x1a3: map_key_clear(KEY_NEXT);		break;
1178		case 0x1a4: map_key_clear(KEY_PREVIOUS);	break;
1179		case 0x1a6: map_key_clear(KEY_HELP);		break;
1180		case 0x1a7: map_key_clear(KEY_DOCUMENTS);	break;
1181		case 0x1ab: map_key_clear(KEY_SPELLCHECK);	break;
1182		case 0x1ae: map_key_clear(KEY_KEYBOARD);	break;
1183		case 0x1b1: map_key_clear(KEY_SCREENSAVER);		break;
1184		case 0x1b4: map_key_clear(KEY_FILE);		break;
1185		case 0x1b6: map_key_clear(KEY_IMAGES);		break;
1186		case 0x1b7: map_key_clear(KEY_AUDIO);		break;
1187		case 0x1b8: map_key_clear(KEY_VIDEO);		break;
1188		case 0x1bc: map_key_clear(KEY_MESSENGER);	break;
1189		case 0x1bd: map_key_clear(KEY_INFO);		break;
1190		case 0x1cb: map_key_clear(KEY_ASSISTANT);	break;
1191		case 0x201: map_key_clear(KEY_NEW);		break;
1192		case 0x202: map_key_clear(KEY_OPEN);		break;
1193		case 0x203: map_key_clear(KEY_CLOSE);		break;
1194		case 0x204: map_key_clear(KEY_EXIT);		break;
1195		case 0x207: map_key_clear(KEY_SAVE);		break;
1196		case 0x208: map_key_clear(KEY_PRINT);		break;
1197		case 0x209: map_key_clear(KEY_PROPS);		break;
1198		case 0x21a: map_key_clear(KEY_UNDO);		break;
1199		case 0x21b: map_key_clear(KEY_COPY);		break;
1200		case 0x21c: map_key_clear(KEY_CUT);		break;
1201		case 0x21d: map_key_clear(KEY_PASTE);		break;
1202		case 0x21f: map_key_clear(KEY_FIND);		break;
1203		case 0x221: map_key_clear(KEY_SEARCH);		break;
1204		case 0x222: map_key_clear(KEY_GOTO);		break;
1205		case 0x223: map_key_clear(KEY_HOMEPAGE);	break;
1206		case 0x224: map_key_clear(KEY_BACK);		break;
1207		case 0x225: map_key_clear(KEY_FORWARD);		break;
1208		case 0x226: map_key_clear(KEY_STOP);		break;
1209		case 0x227: map_key_clear(KEY_REFRESH);		break;
1210		case 0x22a: map_key_clear(KEY_BOOKMARKS);	break;
1211		case 0x22d: map_key_clear(KEY_ZOOMIN);		break;
1212		case 0x22e: map_key_clear(KEY_ZOOMOUT);		break;
1213		case 0x22f: map_key_clear(KEY_ZOOMRESET);	break;
1214		case 0x232: map_key_clear(KEY_FULL_SCREEN);	break;
1215		case 0x233: map_key_clear(KEY_SCROLLUP);	break;
1216		case 0x234: map_key_clear(KEY_SCROLLDOWN);	break;
1217		case 0x238: /* AC Pan */
1218			set_bit(REL_HWHEEL, input->relbit);
1219			map_rel(REL_HWHEEL_HI_RES);
1220			break;
1221		case 0x23d: map_key_clear(KEY_EDIT);		break;
1222		case 0x25f: map_key_clear(KEY_CANCEL);		break;
1223		case 0x269: map_key_clear(KEY_INSERT);		break;
1224		case 0x26a: map_key_clear(KEY_DELETE);		break;
1225		case 0x279: map_key_clear(KEY_REDO);		break;
1226
1227		case 0x289: map_key_clear(KEY_REPLY);		break;
1228		case 0x28b: map_key_clear(KEY_FORWARDMAIL);	break;
1229		case 0x28c: map_key_clear(KEY_SEND);		break;
1230
1231		case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT);	break;
1232
1233		case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);	break;
1234
1235		case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);		break;
1236		case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);		break;
1237		case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);		break;
1238		case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);		break;
1239		case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);	break;
1240		case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);	break;
1241
1242		case 0x29f: map_key_clear(KEY_SCALE);		break;
1243
1244		default: map_key_clear(KEY_UNKNOWN);
1245		}
1246		break;
1247
1248	case HID_UP_GENDEVCTRLS:
1249		switch (usage->hid) {
1250		case HID_DC_BATTERYSTRENGTH:
1251			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1252			usage->type = EV_PWR;
1253			return;
1254		}
1255		goto unknown;
1256
1257	case HID_UP_BATTERY:
1258		switch (usage->hid) {
1259		case HID_BAT_ABSOLUTESTATEOFCHARGE:
1260			hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1261			usage->type = EV_PWR;
1262			return;
1263		case HID_BAT_CHARGING:
1264			usage->type = EV_PWR;
1265			return;
1266		}
1267		goto unknown;
1268	case HID_UP_CAMERA:
1269		switch (usage->hid & HID_USAGE) {
1270		case 0x020:
1271			map_key_clear(KEY_CAMERA_FOCUS);	break;
1272		case 0x021:
1273			map_key_clear(KEY_CAMERA);		break;
1274		default:
1275			goto ignore;
1276		}
1277		break;
1278
1279	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
1280		set_bit(EV_REP, input->evbit);
1281		switch (usage->hid & HID_USAGE) {
1282		case 0x021: map_key_clear(KEY_PRINT);           break;
1283		case 0x070: map_key_clear(KEY_HP);		break;
1284		case 0x071: map_key_clear(KEY_CAMERA);		break;
1285		case 0x072: map_key_clear(KEY_SOUND);		break;
1286		case 0x073: map_key_clear(KEY_QUESTION);	break;
1287		case 0x080: map_key_clear(KEY_EMAIL);		break;
1288		case 0x081: map_key_clear(KEY_CHAT);		break;
1289		case 0x082: map_key_clear(KEY_SEARCH);		break;
1290		case 0x083: map_key_clear(KEY_CONNECT);	        break;
1291		case 0x084: map_key_clear(KEY_FINANCE);		break;
1292		case 0x085: map_key_clear(KEY_SPORT);		break;
1293		case 0x086: map_key_clear(KEY_SHOP);	        break;
1294		default:    goto ignore;
1295		}
1296		break;
1297
1298	case HID_UP_HPVENDOR2:
1299		set_bit(EV_REP, input->evbit);
1300		switch (usage->hid & HID_USAGE) {
1301		case 0x001: map_key_clear(KEY_MICMUTE);		break;
1302		case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);	break;
1303		case 0x004: map_key_clear(KEY_BRIGHTNESSUP);	break;
1304		default:    goto ignore;
1305		}
1306		break;
1307
1308	case HID_UP_MSVENDOR:
1309		goto ignore;
1310
1311	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1312		set_bit(EV_REP, input->evbit);
1313		goto ignore;
1314
1315	case HID_UP_LOGIVENDOR:
1316		/* intentional fallback */
1317	case HID_UP_LOGIVENDOR2:
1318		/* intentional fallback */
1319	case HID_UP_LOGIVENDOR3:
1320		goto ignore;
1321
1322	case HID_UP_PID:
1323		switch (usage->hid & HID_USAGE) {
1324		case 0xa4: map_key_clear(BTN_DEAD);	break;
1325		default: goto ignore;
1326		}
1327		break;
1328
1329	default:
1330	unknown:
1331		if (field->report_size == 1) {
1332			if (field->report->type == HID_OUTPUT_REPORT) {
1333				map_led(LED_MISC);
1334				break;
1335			}
1336			map_key(BTN_MISC);
1337			break;
1338		}
1339		if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1340			map_rel(REL_MISC);
1341			break;
1342		}
1343		map_abs(ABS_MISC);
1344		break;
1345	}
1346
1347mapped:
1348	/* Mapping failed, bail out */
1349	if (!bit)
1350		return;
1351
1352	if (device->driver->input_mapped &&
1353	    device->driver->input_mapped(device, hidinput, field, usage,
1354					 &bit, &max) < 0) {
1355		/*
1356		 * The driver indicated that no further generic handling
1357		 * of the usage is desired.
1358		 */
1359		return;
1360	}
1361
1362	set_bit(usage->type, input->evbit);
1363
1364	/*
1365	 * This part is *really* controversial:
1366	 * - HID aims at being generic so we should do our best to export
1367	 *   all incoming events
1368	 * - HID describes what events are, so there is no reason for ABS_X
1369	 *   to be mapped to ABS_Y
1370	 * - HID is using *_MISC+N as a default value, but nothing prevents
1371	 *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1372	 *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1373	 *   processing)
1374	 *
1375	 * If devices still want to use this (at their own risk), they will
1376	 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1377	 * the default should be a reliable mapping.
1378	 */
1379	while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1380		if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1381			usage->code = find_next_zero_bit(bit,
1382							 max + 1,
1383							 usage->code);
1384		} else {
1385			device->status |= HID_STAT_DUP_DETECTED;
1386			goto ignore;
1387		}
1388	}
1389
1390	if (usage->code > max)
1391		goto ignore;
1392
1393	if (usage->type == EV_ABS) {
1394
1395		int a = field->logical_minimum;
1396		int b = field->logical_maximum;
1397
1398		if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1399			a = field->logical_minimum = 0;
1400			b = field->logical_maximum = 255;
1401		}
1402
1403		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1404			input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1405		else	input_set_abs_params(input, usage->code, a, b, 0, 0);
1406
1407		input_abs_set_res(input, usage->code,
1408				  hidinput_calc_abs_res(field, usage->code));
1409
1410		/* use a larger default input buffer for MT devices */
1411		if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1412			input_set_events_per_packet(input, 60);
1413	}
1414
1415	if (usage->type == EV_ABS &&
1416	    (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1417		int i;
1418		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1419			input_set_abs_params(input, i, -1, 1, 0, 0);
1420			set_bit(i, input->absbit);
1421		}
1422		if (usage->hat_dir && !field->dpad)
1423			field->dpad = usage->code;
1424	}
1425
1426	/* for those devices which produce Consumer volume usage as relative,
1427	 * we emulate pressing volumeup/volumedown appropriate number of times
1428	 * in hidinput_hid_event()
1429	 */
1430	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1431			(usage->code == ABS_VOLUME)) {
1432		set_bit(KEY_VOLUMEUP, input->keybit);
1433		set_bit(KEY_VOLUMEDOWN, input->keybit);
1434	}
1435
1436	if (usage->type == EV_KEY) {
1437		set_bit(EV_MSC, input->evbit);
1438		set_bit(MSC_SCAN, input->mscbit);
1439	}
1440
1441	return;
1442
1443ignore:
1444	usage->type = 0;
1445	usage->code = 0;
1446}
1447
1448static void hidinput_handle_scroll(struct hid_usage *usage,
1449				   struct input_dev *input,
1450				   __s32 value)
1451{
1452	int code;
1453	int hi_res, lo_res;
1454
1455	if (value == 0)
1456		return;
1457
1458	if (usage->code == REL_WHEEL_HI_RES)
1459		code = REL_WHEEL;
1460	else
1461		code = REL_HWHEEL;
1462
1463	/*
1464	 * Windows reports one wheel click as value 120. Where a high-res
1465	 * scroll wheel is present, a fraction of 120 is reported instead.
1466	 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1467	 * adhere to the 120 expectation.
1468	 */
1469	hi_res = value * 120/usage->resolution_multiplier;
1470
1471	usage->wheel_accumulated += hi_res;
1472	lo_res = usage->wheel_accumulated/120;
1473	if (lo_res)
1474		usage->wheel_accumulated -= lo_res * 120;
1475
1476	input_event(input, EV_REL, code, lo_res);
1477	input_event(input, EV_REL, usage->code, hi_res);
1478}
1479
1480static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1481				    unsigned int tool)
1482{
1483	/* if the given tool is not currently reported, ignore */
1484	if (!test_bit(tool, input->key))
1485		return;
1486
1487	/*
1488	 * if the given tool was previously set, release it,
1489	 * release any TOUCH and send an EV_SYN
1490	 */
1491	input_event(input, EV_KEY, BTN_TOUCH, 0);
1492	input_event(input, EV_KEY, tool, 0);
1493	input_event(input, EV_SYN, SYN_REPORT, 0);
1494
1495	report->tool = 0;
1496}
1497
1498static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1499				unsigned int new_tool)
1500{
1501	if (report->tool != new_tool)
1502		hid_report_release_tool(report, input, report->tool);
1503
1504	input_event(input, EV_KEY, new_tool, 1);
1505	report->tool = new_tool;
1506}
1507
1508void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1509{
1510	struct input_dev *input;
1511	struct hid_report *report = field->report;
1512	unsigned *quirks = &hid->quirks;
1513
1514	if (!usage->type)
1515		return;
1516
1517	if (usage->type == EV_PWR) {
1518		bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1519
1520		if (!handled)
1521			hidinput_update_battery(hid, value);
1522
1523		return;
1524	}
1525
1526	if (!field->hidinput)
1527		return;
1528
1529	input = field->hidinput->input;
1530
1531	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1532		int hat_dir = usage->hat_dir;
1533		if (!hat_dir)
1534			hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1535		if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1536		input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1537		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1538		return;
1539	}
1540
1541	/*
1542	 * Ignore out-of-range values as per HID specification,
1543	 * section 5.10 and 6.2.25, when NULL state bit is present.
1544	 * When it's not, clamp the value to match Microsoft's input
1545	 * driver as mentioned in "Required HID usages for digitizers":
1546	 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1547	 *
1548	 * The logical_minimum < logical_maximum check is done so that we
1549	 * don't unintentionally discard values sent by devices which
1550	 * don't specify logical min and max.
1551	 */
1552	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1553	    field->logical_minimum < field->logical_maximum) {
1554		if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1555		    (value < field->logical_minimum ||
1556		     value > field->logical_maximum)) {
1557			dbg_hid("Ignoring out-of-range value %x\n", value);
1558			return;
1559		}
1560		value = clamp(value,
1561			      field->logical_minimum,
1562			      field->logical_maximum);
1563	}
1564
1565	switch (usage->hid) {
1566	case HID_DG_ERASER:
1567		report->tool_active |= !!value;
1568
1569		/*
1570		 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1571		 * to accommodate for devices not following the spec.
1572		 */
1573		if (value)
1574			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1575		else if (report->tool != BTN_TOOL_RUBBER)
1576			/* value is off, tool is not rubber, ignore */
1577			return;
1578		else if (*quirks & HID_QUIRK_NOINVERT &&
1579			 !test_bit(BTN_TOUCH, input->key)) {
1580			/*
1581			 * There is no invert to release the tool, let hid_input
1582			 * send BTN_TOUCH with scancode and release the tool after.
1583			 */
1584			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1585			return;
1586		}
1587
1588		/* let hid-input set BTN_TOUCH */
1589		break;
1590
1591	case HID_DG_INVERT:
1592		report->tool_active |= !!value;
1593
1594		/*
1595		 * If invert is set, we store BTN_TOOL_RUBBER.
1596		 */
1597		if (value)
1598			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1599		else if (!report->tool_active)
1600			/* tool_active not set means Invert and Eraser are not set */
1601			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1602
1603		/* no further processing */
1604		return;
1605
1606	case HID_DG_INRANGE:
1607		report->tool_active |= !!value;
1608
1609		if (report->tool_active) {
1610			/*
1611			 * if tool is not set but is marked as active,
1612			 * assume ours
1613			 */
1614			if (!report->tool)
1615				report->tool = usage->code;
1616
1617			/* drivers may have changed the value behind our back, resend it */
1618			hid_report_set_tool(report, input, report->tool);
1619		} else {
1620			hid_report_release_tool(report, input, usage->code);
1621		}
1622
1623		/* reset tool_active for the next event */
1624		report->tool_active = false;
1625
1626		/* no further processing */
1627		return;
1628
1629	case HID_DG_TIPSWITCH:
1630		report->tool_active |= !!value;
1631
1632		/* if tool is set to RUBBER we should ignore the current value */
1633		if (report->tool == BTN_TOOL_RUBBER)
1634			return;
1635
1636		break;
1637
1638	case HID_DG_TIPPRESSURE:
1639		if (*quirks & HID_QUIRK_NOTOUCH) {
1640			int a = field->logical_minimum;
1641			int b = field->logical_maximum;
1642
1643			if (value > a + ((b - a) >> 3)) {
1644				input_event(input, EV_KEY, BTN_TOUCH, 1);
1645				report->tool_active = true;
1646			}
1647		}
1648		break;
1649
1650	case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1651		dbg_hid("Maximum Effects - %d\n",value);
1652		return;
1653
1654	case HID_UP_PID | 0x7fUL:
1655		dbg_hid("PID Pool Report\n");
1656		return;
1657	}
1658
1659	switch (usage->type) {
1660	case EV_KEY:
1661		if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1662			return;
1663		break;
1664
1665	case EV_REL:
1666		if (usage->code == REL_WHEEL_HI_RES ||
1667		    usage->code == REL_HWHEEL_HI_RES) {
1668			hidinput_handle_scroll(usage, input, value);
1669			return;
1670		}
1671		break;
1672
1673	case EV_ABS:
1674		if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1675		    usage->code == ABS_VOLUME) {
1676			int count = abs(value);
1677			int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1678			int i;
1679
1680			for (i = 0; i < count; i++) {
1681				input_event(input, EV_KEY, direction, 1);
1682				input_sync(input);
1683				input_event(input, EV_KEY, direction, 0);
1684				input_sync(input);
1685			}
1686			return;
1687
1688		} else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1689			   ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1690			value = field->logical_maximum - value;
1691		break;
1692	}
1693
1694	/*
1695	 * Ignore reports for absolute data if the data didn't change. This is
1696	 * not only an optimization but also fixes 'dead' key reports. Some
1697	 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1698	 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1699	 * can only have one of them physically available. The 'dead' keys
1700	 * report constant 0. As all map to the same keycode, they'd confuse
1701	 * the input layer. If we filter the 'dead' keys on the HID level, we
1702	 * skip the keycode translation and only forward real events.
1703	 */
1704	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1705	                      HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1706			      (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1707	    usage->usage_index < field->maxusage &&
1708	    value == field->value[usage->usage_index])
1709		return;
1710
1711	/* report the usage code as scancode if the key status has changed */
1712	if (usage->type == EV_KEY &&
1713	    (!test_bit(usage->code, input->key)) == value)
1714		input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1715
1716	input_event(input, usage->type, usage->code, value);
1717
1718	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1719	    usage->type == EV_KEY && value) {
1720		input_sync(input);
1721		input_event(input, usage->type, usage->code, 0);
1722	}
1723}
1724
1725void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1726{
1727	struct hid_input *hidinput;
1728
1729	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1730		return;
1731
1732	list_for_each_entry(hidinput, &hid->inputs, list)
1733		input_sync(hidinput->input);
1734}
1735EXPORT_SYMBOL_GPL(hidinput_report_event);
1736
1737static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1738			       unsigned int code, struct hid_field **field)
1739{
1740	struct hid_report *report;
1741	int i, j;
1742
1743	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1744		for (i = 0; i < report->maxfield; i++) {
1745			*field = report->field[i];
1746			for (j = 0; j < (*field)->maxusage; j++)
1747				if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1748					return j;
1749		}
1750	}
1751	return -1;
1752}
1753
1754struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1755{
1756	struct hid_report *report;
1757	struct hid_field *field;
1758	int i, j;
1759
1760	list_for_each_entry(report,
1761			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1762			    list) {
1763		for (i = 0; i < report->maxfield; i++) {
1764			field = report->field[i];
1765			for (j = 0; j < field->maxusage; j++)
1766				if (field->usage[j].type == EV_LED)
1767					return field;
1768		}
1769	}
1770	return NULL;
1771}
1772EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1773
1774unsigned int hidinput_count_leds(struct hid_device *hid)
1775{
1776	struct hid_report *report;
1777	struct hid_field *field;
1778	int i, j;
1779	unsigned int count = 0;
1780
1781	list_for_each_entry(report,
1782			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1783			    list) {
1784		for (i = 0; i < report->maxfield; i++) {
1785			field = report->field[i];
1786			for (j = 0; j < field->maxusage; j++)
1787				if (field->usage[j].type == EV_LED &&
1788				    field->value[j])
1789					count += 1;
1790		}
1791	}
1792	return count;
1793}
1794EXPORT_SYMBOL_GPL(hidinput_count_leds);
1795
1796static void hidinput_led_worker(struct work_struct *work)
1797{
1798	struct hid_device *hid = container_of(work, struct hid_device,
1799					      led_work);
1800	struct hid_field *field;
1801	struct hid_report *report;
1802	int ret;
1803	u32 len;
1804	__u8 *buf;
1805
1806	field = hidinput_get_led_field(hid);
1807	if (!field)
1808		return;
1809
1810	/*
1811	 * field->report is accessed unlocked regarding HID core. So there might
1812	 * be another incoming SET-LED request from user-space, which changes
1813	 * the LED state while we assemble our outgoing buffer. However, this
1814	 * doesn't matter as hid_output_report() correctly converts it into a
1815	 * boolean value no matter what information is currently set on the LED
1816	 * field (even garbage). So the remote device will always get a valid
1817	 * request.
1818	 * And in case we send a wrong value, a next led worker is spawned
1819	 * for every SET-LED request so the following worker will send the
1820	 * correct value, guaranteed!
1821	 */
1822
1823	report = field->report;
1824
1825	/* use custom SET_REPORT request if possible (asynchronous) */
1826	if (hid->ll_driver->request)
1827		return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1828
1829	/* fall back to generic raw-output-report */
1830	len = hid_report_len(report);
1831	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1832	if (!buf)
1833		return;
1834
1835	hid_output_report(report, buf);
1836	/* synchronous output report */
1837	ret = hid_hw_output_report(hid, buf, len);
1838	if (ret == -ENOSYS)
1839		hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1840				HID_REQ_SET_REPORT);
1841	kfree(buf);
1842}
1843
1844static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1845				unsigned int code, int value)
1846{
1847	struct hid_device *hid = input_get_drvdata(dev);
1848	struct hid_field *field;
1849	int offset;
1850
1851	if (type == EV_FF)
1852		return input_ff_event(dev, type, code, value);
1853
1854	if (type != EV_LED)
1855		return -1;
1856
1857	if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1858		hid_warn(dev, "event field not found\n");
1859		return -1;
1860	}
1861
1862	hid_set_field(field, offset, value);
1863
1864	schedule_work(&hid->led_work);
1865	return 0;
1866}
1867
1868static int hidinput_open(struct input_dev *dev)
1869{
1870	struct hid_device *hid = input_get_drvdata(dev);
1871
1872	return hid_hw_open(hid);
1873}
1874
1875static void hidinput_close(struct input_dev *dev)
1876{
1877	struct hid_device *hid = input_get_drvdata(dev);
1878
1879	hid_hw_close(hid);
1880}
1881
1882static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1883		struct hid_report *report, bool use_logical_max)
1884{
1885	struct hid_usage *usage;
1886	bool update_needed = false;
1887	bool get_report_completed = false;
1888	int i, j;
1889
1890	if (report->maxfield == 0)
1891		return false;
1892
1893	for (i = 0; i < report->maxfield; i++) {
1894		__s32 value = use_logical_max ?
1895			      report->field[i]->logical_maximum :
1896			      report->field[i]->logical_minimum;
1897
1898		/* There is no good reason for a Resolution
1899		 * Multiplier to have a count other than 1.
1900		 * Ignore that case.
1901		 */
1902		if (report->field[i]->report_count != 1)
1903			continue;
1904
1905		for (j = 0; j < report->field[i]->maxusage; j++) {
1906			usage = &report->field[i]->usage[j];
1907
1908			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1909				continue;
1910
1911			/*
1912			 * If we have more than one feature within this
1913			 * report we need to fill in the bits from the
1914			 * others before we can overwrite the ones for the
1915			 * Resolution Multiplier.
1916			 *
1917			 * But if we're not allowed to read from the device,
1918			 * we just bail. Such a device should not exist
1919			 * anyway.
1920			 */
1921			if (!get_report_completed && report->maxfield > 1) {
1922				if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1923					return update_needed;
1924
1925				hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1926				hid_hw_wait(hid);
1927				get_report_completed = true;
1928			}
1929
1930			report->field[i]->value[j] = value;
1931			update_needed = true;
1932		}
1933	}
1934
1935	return update_needed;
1936}
1937
1938static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1939{
1940	struct hid_report_enum *rep_enum;
1941	struct hid_report *rep;
1942	int ret;
1943
1944	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1945	list_for_each_entry(rep, &rep_enum->report_list, list) {
1946		bool update_needed = __hidinput_change_resolution_multipliers(hid,
1947								     rep, true);
1948
1949		if (update_needed) {
1950			ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1951			if (ret) {
1952				__hidinput_change_resolution_multipliers(hid,
1953								    rep, false);
1954				return;
1955			}
1956		}
1957	}
1958
1959	/* refresh our structs */
1960	hid_setup_resolution_multiplier(hid);
1961}
1962
1963static void report_features(struct hid_device *hid)
1964{
1965	struct hid_driver *drv = hid->driver;
1966	struct hid_report_enum *rep_enum;
1967	struct hid_report *rep;
1968	struct hid_usage *usage;
1969	int i, j;
1970
1971	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1972	list_for_each_entry(rep, &rep_enum->report_list, list)
1973		for (i = 0; i < rep->maxfield; i++) {
1974			/* Ignore if report count is out of bounds. */
1975			if (rep->field[i]->report_count < 1)
1976				continue;
1977
1978			for (j = 0; j < rep->field[i]->maxusage; j++) {
1979				usage = &rep->field[i]->usage[j];
1980
1981				/* Verify if Battery Strength feature is available */
1982				if (usage->hid == HID_DC_BATTERYSTRENGTH)
1983					hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1984							       rep->field[i], false);
1985
1986				if (drv->feature_mapping)
1987					drv->feature_mapping(hid, rep->field[i], usage);
1988			}
1989		}
1990}
1991
1992static struct hid_input *hidinput_allocate(struct hid_device *hid,
1993					   unsigned int application)
1994{
1995	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1996	struct input_dev *input_dev = input_allocate_device();
1997	const char *suffix = NULL;
1998	size_t suffix_len, name_len;
1999
2000	if (!hidinput || !input_dev)
2001		goto fail;
2002
2003	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2004	    hid->maxapplication > 1) {
2005		switch (application) {
2006		case HID_GD_KEYBOARD:
2007			suffix = "Keyboard";
2008			break;
2009		case HID_GD_KEYPAD:
2010			suffix = "Keypad";
2011			break;
2012		case HID_GD_MOUSE:
2013			suffix = "Mouse";
2014			break;
2015		case HID_DG_PEN:
2016			/*
2017			 * yes, there is an issue here:
2018			 *  DG_PEN -> "Stylus"
2019			 *  DG_STYLUS -> "Pen"
2020			 * But changing this now means users with config snippets
2021			 * will have to change it and the test suite will not be happy.
2022			 */
2023			suffix = "Stylus";
2024			break;
2025		case HID_DG_STYLUS:
2026			suffix = "Pen";
2027			break;
2028		case HID_DG_TOUCHSCREEN:
2029			suffix = "Touchscreen";
2030			break;
2031		case HID_DG_TOUCHPAD:
2032			suffix = "Touchpad";
2033			break;
2034		case HID_GD_SYSTEM_CONTROL:
2035			suffix = "System Control";
2036			break;
2037		case HID_CP_CONSUMER_CONTROL:
2038			suffix = "Consumer Control";
2039			break;
2040		case HID_GD_WIRELESS_RADIO_CTLS:
2041			suffix = "Wireless Radio Control";
2042			break;
2043		case HID_GD_SYSTEM_MULTIAXIS:
2044			suffix = "System Multi Axis";
2045			break;
2046		default:
2047			break;
2048		}
2049	}
2050
2051	if (suffix) {
2052		name_len = strlen(hid->name);
2053		suffix_len = strlen(suffix);
2054		if ((name_len < suffix_len) ||
2055		    strcmp(hid->name + name_len - suffix_len, suffix)) {
2056			hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2057						   hid->name, suffix);
2058			if (!hidinput->name)
2059				goto fail;
2060		}
2061	}
2062
2063	input_set_drvdata(input_dev, hid);
2064	input_dev->event = hidinput_input_event;
2065	input_dev->open = hidinput_open;
2066	input_dev->close = hidinput_close;
2067	input_dev->setkeycode = hidinput_setkeycode;
2068	input_dev->getkeycode = hidinput_getkeycode;
2069
2070	input_dev->name = hidinput->name ? hidinput->name : hid->name;
2071	input_dev->phys = hid->phys;
2072	input_dev->uniq = hid->uniq;
2073	input_dev->id.bustype = hid->bus;
2074	input_dev->id.vendor  = hid->vendor;
2075	input_dev->id.product = hid->product;
2076	input_dev->id.version = hid->version;
2077	input_dev->dev.parent = &hid->dev;
2078
2079	hidinput->input = input_dev;
2080	hidinput->application = application;
2081	list_add_tail(&hidinput->list, &hid->inputs);
2082
2083	INIT_LIST_HEAD(&hidinput->reports);
2084
2085	return hidinput;
2086
2087fail:
2088	kfree(hidinput);
2089	input_free_device(input_dev);
2090	hid_err(hid, "Out of memory during hid input probe\n");
2091	return NULL;
2092}
2093
2094static bool hidinput_has_been_populated(struct hid_input *hidinput)
2095{
2096	int i;
2097	unsigned long r = 0;
2098
2099	for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2100		r |= hidinput->input->evbit[i];
2101
2102	for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2103		r |= hidinput->input->keybit[i];
2104
2105	for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2106		r |= hidinput->input->relbit[i];
2107
2108	for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2109		r |= hidinput->input->absbit[i];
2110
2111	for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2112		r |= hidinput->input->mscbit[i];
2113
2114	for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2115		r |= hidinput->input->ledbit[i];
2116
2117	for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2118		r |= hidinput->input->sndbit[i];
2119
2120	for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2121		r |= hidinput->input->ffbit[i];
2122
2123	for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2124		r |= hidinput->input->swbit[i];
2125
2126	return !!r;
2127}
2128
2129static void hidinput_cleanup_hidinput(struct hid_device *hid,
2130		struct hid_input *hidinput)
2131{
2132	struct hid_report *report;
2133	int i, k;
2134
2135	list_del(&hidinput->list);
2136	input_free_device(hidinput->input);
2137	kfree(hidinput->name);
2138
2139	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2140		if (k == HID_OUTPUT_REPORT &&
2141			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2142			continue;
2143
2144		list_for_each_entry(report, &hid->report_enum[k].report_list,
2145				    list) {
2146
2147			for (i = 0; i < report->maxfield; i++)
2148				if (report->field[i]->hidinput == hidinput)
2149					report->field[i]->hidinput = NULL;
2150		}
2151	}
2152
2153	kfree(hidinput);
2154}
2155
2156static struct hid_input *hidinput_match(struct hid_report *report)
2157{
2158	struct hid_device *hid = report->device;
2159	struct hid_input *hidinput;
2160
2161	list_for_each_entry(hidinput, &hid->inputs, list) {
2162		if (hidinput->report &&
2163		    hidinput->report->id == report->id)
2164			return hidinput;
2165	}
2166
2167	return NULL;
2168}
2169
2170static struct hid_input *hidinput_match_application(struct hid_report *report)
2171{
2172	struct hid_device *hid = report->device;
2173	struct hid_input *hidinput;
2174
2175	list_for_each_entry(hidinput, &hid->inputs, list) {
2176		if (hidinput->application == report->application)
2177			return hidinput;
2178
2179		/*
2180		 * Keep SystemControl and ConsumerControl applications together
2181		 * with the main keyboard, if present.
2182		 */
2183		if ((report->application == HID_GD_SYSTEM_CONTROL ||
2184		     report->application == HID_CP_CONSUMER_CONTROL) &&
2185		    hidinput->application == HID_GD_KEYBOARD) {
2186			return hidinput;
2187		}
2188	}
2189
2190	return NULL;
2191}
2192
2193static inline void hidinput_configure_usages(struct hid_input *hidinput,
2194					     struct hid_report *report)
2195{
2196	int i, j, k;
2197	int first_field_index = 0;
2198	int slot_collection_index = -1;
2199	int prev_collection_index = -1;
2200	unsigned int slot_idx = 0;
2201	struct hid_field *field;
2202
2203	/*
2204	 * First tag all the fields that are part of a slot,
2205	 * a slot needs to have one Contact ID in the collection
2206	 */
2207	for (i = 0; i < report->maxfield; i++) {
2208		field = report->field[i];
2209
2210		/* ignore fields without usage */
2211		if (field->maxusage < 1)
2212			continue;
2213
2214		/*
2215		 * janitoring when collection_index changes
2216		 */
2217		if (prev_collection_index != field->usage->collection_index) {
2218			prev_collection_index = field->usage->collection_index;
2219			first_field_index = i;
2220		}
2221
2222		/*
2223		 * if we already found a Contact ID in the collection,
2224		 * tag and continue to the next.
2225		 */
2226		if (slot_collection_index == field->usage->collection_index) {
2227			field->slot_idx = slot_idx;
2228			continue;
2229		}
2230
2231		/* check if the current field has Contact ID */
2232		for (j = 0; j < field->maxusage; j++) {
2233			if (field->usage[j].hid == HID_DG_CONTACTID) {
2234				slot_collection_index = field->usage->collection_index;
2235				slot_idx++;
2236
2237				/*
2238				 * mark all previous fields and this one in the
2239				 * current collection to be slotted.
2240				 */
2241				for (k = first_field_index; k <= i; k++)
2242					report->field[k]->slot_idx = slot_idx;
2243				break;
2244			}
2245		}
2246	}
2247
2248	for (i = 0; i < report->maxfield; i++)
2249		for (j = 0; j < report->field[i]->maxusage; j++)
2250			hidinput_configure_usage(hidinput, report->field[i],
2251						 report->field[i]->usage + j,
2252						 j);
2253}
2254
2255/*
2256 * Register the input device; print a message.
2257 * Configure the input layer interface
2258 * Read all reports and initialize the absolute field values.
2259 */
2260
2261int hidinput_connect(struct hid_device *hid, unsigned int force)
2262{
2263	struct hid_driver *drv = hid->driver;
2264	struct hid_report *report;
2265	struct hid_input *next, *hidinput = NULL;
2266	unsigned int application;
2267	int i, k;
2268
2269	INIT_LIST_HEAD(&hid->inputs);
2270	INIT_WORK(&hid->led_work, hidinput_led_worker);
2271
2272	hid->status &= ~HID_STAT_DUP_DETECTED;
2273
2274	if (!force) {
2275		for (i = 0; i < hid->maxcollection; i++) {
2276			struct hid_collection *col = &hid->collection[i];
2277			if (col->type == HID_COLLECTION_APPLICATION ||
2278					col->type == HID_COLLECTION_PHYSICAL)
2279				if (IS_INPUT_APPLICATION(col->usage))
2280					break;
2281		}
2282
2283		if (i == hid->maxcollection)
2284			return -1;
2285	}
2286
2287	report_features(hid);
2288
2289	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2290		if (k == HID_OUTPUT_REPORT &&
2291			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2292			continue;
2293
2294		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2295
2296			if (!report->maxfield)
2297				continue;
2298
2299			application = report->application;
2300
2301			/*
2302			 * Find the previous hidinput report attached
2303			 * to this report id.
2304			 */
2305			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2306				hidinput = hidinput_match(report);
2307			else if (hid->maxapplication > 1 &&
2308				 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2309				hidinput = hidinput_match_application(report);
2310
2311			if (!hidinput) {
2312				hidinput = hidinput_allocate(hid, application);
2313				if (!hidinput)
2314					goto out_unwind;
2315			}
2316
2317			hidinput_configure_usages(hidinput, report);
2318
2319			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2320				hidinput->report = report;
2321
2322			list_add_tail(&report->hidinput_list,
2323				      &hidinput->reports);
2324		}
2325	}
2326
2327	hidinput_change_resolution_multipliers(hid);
2328
2329	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2330		if (drv->input_configured &&
2331		    drv->input_configured(hid, hidinput))
2332			goto out_unwind;
2333
2334		if (!hidinput_has_been_populated(hidinput)) {
2335			/* no need to register an input device not populated */
2336			hidinput_cleanup_hidinput(hid, hidinput);
2337			continue;
2338		}
2339
2340		if (input_register_device(hidinput->input))
2341			goto out_unwind;
2342		hidinput->registered = true;
2343	}
2344
2345	if (list_empty(&hid->inputs)) {
2346		hid_err(hid, "No inputs registered, leaving\n");
2347		goto out_unwind;
2348	}
2349
2350	if (hid->status & HID_STAT_DUP_DETECTED)
2351		hid_dbg(hid,
2352			"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2353
2354	return 0;
2355
2356out_unwind:
2357	/* unwind the ones we already registered */
2358	hidinput_disconnect(hid);
2359
2360	return -1;
2361}
2362EXPORT_SYMBOL_GPL(hidinput_connect);
2363
2364void hidinput_disconnect(struct hid_device *hid)
2365{
2366	struct hid_input *hidinput, *next;
2367
2368	hidinput_cleanup_battery(hid);
2369
2370	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2371		list_del(&hidinput->list);
2372		if (hidinput->registered)
2373			input_unregister_device(hidinput->input);
2374		else
2375			input_free_device(hidinput->input);
2376		kfree(hidinput->name);
2377		kfree(hidinput);
2378	}
2379
2380	/* led_work is spawned by input_dev callbacks, but doesn't access the
2381	 * parent input_dev at all. Once all input devices are removed, we
2382	 * know that led_work will never get restarted, so we can cancel it
2383	 * synchronously and are safe. */
2384	cancel_work_sync(&hid->led_work);
2385}
2386EXPORT_SYMBOL_GPL(hidinput_disconnect);
2387
2388#ifdef CONFIG_HID_KUNIT_TEST
2389#include "hid-input-test.c"
2390#endif