hid-input.c

   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	case ABS_PRESSURE:
 307	case ABS_MT_PRESSURE:
 308		if (field->unit == HID_UNIT_NEWTON) {
 309			/* Convert to grams, 1 newton is 101.97 grams */
 310			prev = physical_extents;
 311			physical_extents *= 10197;
 312			if (physical_extents < prev)
 313				return 0;
 314			unit_exponent -= 2;
 315		} else if (field->unit != HID_UNIT_GRAM) {
 316			return 0;
 317		}
 318		break;
 319	default:
 320		return 0;
 321	}
 322
 323	/* Apply negative unit exponent */
 324	for (; unit_exponent < 0; unit_exponent++) {
 325		prev = logical_extents;
 326		logical_extents *= 10;
 327		if (logical_extents < prev)
 328			return 0;
 329	}
 330	/* Apply positive unit exponent */
 331	for (; unit_exponent > 0; unit_exponent--) {
 332		prev = physical_extents;
 333		physical_extents *= 10;
 334		if (physical_extents < prev)
 335			return 0;
 336	}
 337
 338	/* Calculate resolution */
 339	return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 340}
 341EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 342
 343#ifdef CONFIG_HID_BATTERY_STRENGTH
 344static enum power_supply_property hidinput_battery_props[] = {
 345	POWER_SUPPLY_PROP_PRESENT,
 346	POWER_SUPPLY_PROP_ONLINE,
 347	POWER_SUPPLY_PROP_CAPACITY,
 348	POWER_SUPPLY_PROP_MODEL_NAME,
 349	POWER_SUPPLY_PROP_STATUS,
 350	POWER_SUPPLY_PROP_SCOPE,
 351};
 352
 353#define HID_BATTERY_QUIRK_PERCENT	(1 << 0) /* always reports percent */
 354#define HID_BATTERY_QUIRK_FEATURE	(1 << 1) /* ask for feature report */
 355#define HID_BATTERY_QUIRK_IGNORE	(1 << 2) /* completely ignore the battery */
 356#define HID_BATTERY_QUIRK_AVOID_QUERY	(1 << 3) /* do not query the battery */
 357
 358static const struct hid_device_id hid_battery_quirks[] = {
 359	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 360		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 361	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 362	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 363		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 364	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 365	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 366		USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 367	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 368	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 369			       USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 370	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 371	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 372		USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 373	  HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 374	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 375		USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
 376	  HID_BATTERY_QUIRK_IGNORE },
 377	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 378		USB_DEVICE_ID_ELECOM_BM084),
 379	  HID_BATTERY_QUIRK_IGNORE },
 380	{ HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 381		USB_DEVICE_ID_SYMBOL_SCANNER_3),
 382	  HID_BATTERY_QUIRK_IGNORE },
 383	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 384		USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 385	  HID_BATTERY_QUIRK_IGNORE },
 386	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 387		USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 388	  HID_BATTERY_QUIRK_IGNORE },
 389	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 390	  HID_BATTERY_QUIRK_IGNORE },
 391	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 392	  HID_BATTERY_QUIRK_IGNORE },
 393	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
 394	  HID_BATTERY_QUIRK_AVOID_QUERY },
 395	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
 396	  HID_BATTERY_QUIRK_AVOID_QUERY },
 397	{ HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
 398	  HID_BATTERY_QUIRK_AVOID_QUERY },
 399	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
 400	  HID_BATTERY_QUIRK_AVOID_QUERY },
 401	/*
 402	 * Elan HID touchscreens seem to all report a non present battery,
 403	 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
 404	 */
 405	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
 406	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
 407	{}
 408};
 409
 410static unsigned find_battery_quirk(struct hid_device *hdev)
 411{
 412	unsigned quirks = 0;
 413	const struct hid_device_id *match;
 414
 415	match = hid_match_id(hdev, hid_battery_quirks);
 416	if (match != NULL)
 417		quirks = match->driver_data;
 418
 419	return quirks;
 420}
 421
 422static int hidinput_scale_battery_capacity(struct hid_device *dev,
 423					   int value)
 424{
 425	if (dev->battery_min < dev->battery_max &&
 426	    value >= dev->battery_min && value <= dev->battery_max)
 427		value = ((value - dev->battery_min) * 100) /
 428			(dev->battery_max - dev->battery_min);
 429
 430	return value;
 431}
 432
 433static int hidinput_query_battery_capacity(struct hid_device *dev)
 434{
 435	u8 *buf;
 436	int ret;
 437
 438	buf = kmalloc(4, GFP_KERNEL);
 439	if (!buf)
 440		return -ENOMEM;
 441
 442	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 443				 dev->battery_report_type, HID_REQ_GET_REPORT);
 444	if (ret < 2) {
 445		kfree(buf);
 446		return -ENODATA;
 447	}
 448
 449	ret = hidinput_scale_battery_capacity(dev, buf[1]);
 450	kfree(buf);
 451	return ret;
 452}
 453
 454static int hidinput_get_battery_property(struct power_supply *psy,
 455					 enum power_supply_property prop,
 456					 union power_supply_propval *val)
 457{
 458	struct hid_device *dev = power_supply_get_drvdata(psy);
 459	int value;
 460	int ret = 0;
 461
 462	switch (prop) {
 463	case POWER_SUPPLY_PROP_PRESENT:
 464	case POWER_SUPPLY_PROP_ONLINE:
 465		val->intval = 1;
 466		break;
 467
 468	case POWER_SUPPLY_PROP_CAPACITY:
 469		if (dev->battery_status != HID_BATTERY_REPORTED &&
 470		    !dev->battery_avoid_query) {
 471			value = hidinput_query_battery_capacity(dev);
 472			if (value < 0)
 473				return value;
 474		} else  {
 475			value = dev->battery_capacity;
 476		}
 477
 478		val->intval = value;
 479		break;
 480
 481	case POWER_SUPPLY_PROP_MODEL_NAME:
 482		val->strval = dev->name;
 483		break;
 484
 485	case POWER_SUPPLY_PROP_STATUS:
 486		if (dev->battery_status != HID_BATTERY_REPORTED &&
 487		    !dev->battery_avoid_query) {
 488			value = hidinput_query_battery_capacity(dev);
 489			if (value < 0)
 490				return value;
 491
 492			dev->battery_capacity = value;
 493			dev->battery_status = HID_BATTERY_QUERIED;
 494		}
 495
 496		if (dev->battery_status == HID_BATTERY_UNKNOWN)
 497			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 498		else
 499			val->intval = dev->battery_charge_status;
 500		break;
 501
 502	case POWER_SUPPLY_PROP_SCOPE:
 503		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 504		break;
 505
 506	default:
 507		ret = -EINVAL;
 508		break;
 509	}
 510
 511	return ret;
 512}
 513
 514static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 515				  struct hid_field *field, bool is_percentage)
 516{
 517	struct power_supply_desc *psy_desc;
 518	struct power_supply_config psy_cfg = { .drv_data = dev, };
 519	unsigned quirks;
 520	s32 min, max;
 521	int error;
 522
 523	if (dev->battery)
 524		return 0;	/* already initialized? */
 525
 526	quirks = find_battery_quirk(dev);
 527
 528	hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 529		dev->bus, dev->vendor, dev->product, dev->version, quirks);
 530
 531	if (quirks & HID_BATTERY_QUIRK_IGNORE)
 532		return 0;
 533
 534	psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 535	if (!psy_desc)
 536		return -ENOMEM;
 537
 538	psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 539				   strlen(dev->uniq) ?
 540					dev->uniq : dev_name(&dev->dev));
 541	if (!psy_desc->name) {
 542		error = -ENOMEM;
 543		goto err_free_mem;
 544	}
 545
 546	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 547	psy_desc->properties = hidinput_battery_props;
 548	psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 549	psy_desc->use_for_apm = 0;
 550	psy_desc->get_property = hidinput_get_battery_property;
 551
 552	min = field->logical_minimum;
 553	max = field->logical_maximum;
 554
 555	if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
 556		min = 0;
 557		max = 100;
 558	}
 559
 560	if (quirks & HID_BATTERY_QUIRK_FEATURE)
 561		report_type = HID_FEATURE_REPORT;
 562
 563	dev->battery_min = min;
 564	dev->battery_max = max;
 565	dev->battery_report_type = report_type;
 566	dev->battery_report_id = field->report->id;
 567	dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
 568
 569	/*
 570	 * Stylus is normally not connected to the device and thus we
 571	 * can't query the device and get meaningful battery strength.
 572	 * We have to wait for the device to report it on its own.
 573	 */
 574	dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 575				   field->physical == HID_DG_STYLUS;
 576
 577	if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
 578		dev->battery_avoid_query = true;
 579
 580	dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 581	if (IS_ERR(dev->battery)) {
 582		error = PTR_ERR(dev->battery);
 583		hid_warn(dev, "can't register power supply: %d\n", error);
 584		goto err_free_name;
 585	}
 586
 587	power_supply_powers(dev->battery, &dev->dev);
 588	return 0;
 589
 590err_free_name:
 591	kfree(psy_desc->name);
 592err_free_mem:
 593	kfree(psy_desc);
 594	dev->battery = NULL;
 595	return error;
 596}
 597
 598static void hidinput_cleanup_battery(struct hid_device *dev)
 599{
 600	const struct power_supply_desc *psy_desc;
 601
 602	if (!dev->battery)
 603		return;
 604
 605	psy_desc = dev->battery->desc;
 606	power_supply_unregister(dev->battery);
 607	kfree(psy_desc->name);
 608	kfree(psy_desc);
 609	dev->battery = NULL;
 610}
 611
 612static bool hidinput_update_battery_charge_status(struct hid_device *dev,
 613						  unsigned int usage, int value)
 614{
 615	switch (usage) {
 616	case HID_BAT_CHARGING:
 617		dev->battery_charge_status = value ?
 618					     POWER_SUPPLY_STATUS_CHARGING :
 619					     POWER_SUPPLY_STATUS_DISCHARGING;
 620		return true;
 621	}
 622
 623	return false;
 624}
 625
 626static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
 627				    int value)
 628{
 629	int capacity;
 630
 631	if (!dev->battery)
 632		return;
 633
 634	if (hidinput_update_battery_charge_status(dev, usage, value)) {
 635		power_supply_changed(dev->battery);
 636		return;
 637	}
 638
 639	if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
 640		return;
 641
 642	if (value < dev->battery_min || value > dev->battery_max)
 643		return;
 644
 645	capacity = hidinput_scale_battery_capacity(dev, value);
 646
 647	if (dev->battery_status != HID_BATTERY_REPORTED ||
 648	    capacity != dev->battery_capacity ||
 649	    ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
 650		dev->battery_capacity = capacity;
 651		dev->battery_status = HID_BATTERY_REPORTED;
 652		dev->battery_ratelimit_time =
 653			ktime_add_ms(ktime_get_coarse(), 30 * 1000);
 654		power_supply_changed(dev->battery);
 655	}
 656}
 657#else  /* !CONFIG_HID_BATTERY_STRENGTH */
 658static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 659				  struct hid_field *field, bool is_percentage)
 660{
 661	return 0;
 662}
 663
 664static void hidinput_cleanup_battery(struct hid_device *dev)
 665{
 666}
 667
 668static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
 669				    int value)
 670{
 671}
 672#endif	/* CONFIG_HID_BATTERY_STRENGTH */
 673
 674static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
 675					 unsigned int type, unsigned int usage)
 676{
 677	struct hid_collection *collection;
 678
 679	collection = &device->collection[field->usage->collection_index];
 680
 681	return collection->type == type && collection->usage == usage;
 682}
 683
 684static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 685				     struct hid_usage *usage, unsigned int usage_index)
 686{
 687	struct input_dev *input = hidinput->input;
 688	struct hid_device *device = input_get_drvdata(input);
 689	const struct usage_priority *usage_priority = NULL;
 690	int max = 0, code;
 691	unsigned int i = 0;
 692	unsigned long *bit = NULL;
 693
 694	field->hidinput = hidinput;
 695
 696	if (field->flags & HID_MAIN_ITEM_CONSTANT)
 697		goto ignore;
 698
 699	/* Ignore if report count is out of bounds. */
 700	if (field->report_count < 1)
 701		goto ignore;
 702
 703	/* only LED and HAPTIC usages are supported in output fields */
 704	if (field->report_type == HID_OUTPUT_REPORT &&
 705	    (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
 706	    (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
 707		goto ignore;
 708	}
 709
 710	/* assign a priority based on the static list declared here */
 711	for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
 712		if (usage->hid == hidinput_usages_priorities[i].usage) {
 713			usage_priority = &hidinput_usages_priorities[i];
 714
 715			field->usages_priorities[usage_index] =
 716				(ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
 717			break;
 718		}
 719	}
 720
 721	/*
 722	 * For slotted devices, we need to also add the slot index
 723	 * in the priority.
 724	 */
 725	if (usage_priority && usage_priority->global)
 726		field->usages_priorities[usage_index] |=
 727			usage_priority->slot_overwrite;
 728	else
 729		field->usages_priorities[usage_index] |=
 730			(0xff - field->slot_idx) << 16;
 731
 732	if (device->driver->input_mapping) {
 733		int ret = device->driver->input_mapping(device, hidinput, field,
 734				usage, &bit, &max);
 735		if (ret > 0)
 736			goto mapped;
 737		if (ret < 0)
 738			goto ignore;
 739	}
 740
 741	switch (usage->hid & HID_USAGE_PAGE) {
 742	case HID_UP_UNDEFINED:
 743		goto ignore;
 744
 745	case HID_UP_KEYBOARD:
 746		set_bit(EV_REP, input->evbit);
 747
 748		if ((usage->hid & HID_USAGE) < 256) {
 749			if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 750			map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 751		} else
 752			map_key(KEY_UNKNOWN);
 753
 754		break;
 755
 756	case HID_UP_BUTTON:
 757		code = ((usage->hid - 1) & HID_USAGE);
 758
 759		switch (field->application) {
 760		case HID_GD_MOUSE:
 761		case HID_GD_POINTER:  code += BTN_MOUSE; break;
 762		case HID_GD_JOYSTICK:
 763				if (code <= 0xf)
 764					code += BTN_JOYSTICK;
 765				else
 766					code += BTN_TRIGGER_HAPPY - 0x10;
 767				break;
 768		case HID_GD_GAMEPAD:
 769				if (code <= 0xf)
 770					code += BTN_GAMEPAD;
 771				else
 772					code += BTN_TRIGGER_HAPPY - 0x10;
 773				break;
 774		case HID_CP_CONSUMER_CONTROL:
 775				if (hidinput_field_in_collection(device, field,
 776								 HID_COLLECTION_NAMED_ARRAY,
 777								 HID_CP_PROGRAMMABLEBUTTONS)) {
 778					if (code <= 0x1d)
 779						code += KEY_MACRO1;
 780					else
 781						code += BTN_TRIGGER_HAPPY - 0x1e;
 782					break;
 783				}
 784				fallthrough;
 785		default:
 786			switch (field->physical) {
 787			case HID_GD_MOUSE:
 788			case HID_GD_POINTER:  code += BTN_MOUSE; break;
 789			case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 790			case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 791			default:              code += BTN_MISC;
 792			}
 793		}
 794
 795		map_key(code);
 796		break;
 797
 798	case HID_UP_SIMULATION:
 799		switch (usage->hid & 0xffff) {
 800		case 0xba: map_abs(ABS_RUDDER);   break;
 801		case 0xbb: map_abs(ABS_THROTTLE); break;
 802		case 0xc4: map_abs(ABS_GAS);      break;
 803		case 0xc5: map_abs(ABS_BRAKE);    break;
 804		case 0xc8: map_abs(ABS_WHEEL);    break;
 805		default:   goto ignore;
 806		}
 807		break;
 808
 809	case HID_UP_GENDESK:
 810		if ((usage->hid & 0xf0) == 0x80) {	/* SystemControl */
 811			switch (usage->hid & 0xf) {
 812			case 0x1: map_key_clear(KEY_POWER);  break;
 813			case 0x2: map_key_clear(KEY_SLEEP);  break;
 814			case 0x3: map_key_clear(KEY_WAKEUP); break;
 815			case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 816			case 0x5: map_key_clear(KEY_MENU); break;
 817			case 0x6: map_key_clear(KEY_PROG1); break;
 818			case 0x7: map_key_clear(KEY_HELP); break;
 819			case 0x8: map_key_clear(KEY_EXIT); break;
 820			case 0x9: map_key_clear(KEY_SELECT); break;
 821			case 0xa: map_key_clear(KEY_RIGHT); break;
 822			case 0xb: map_key_clear(KEY_LEFT); break;
 823			case 0xc: map_key_clear(KEY_UP); break;
 824			case 0xd: map_key_clear(KEY_DOWN); break;
 825			case 0xe: map_key_clear(KEY_POWER2); break;
 826			case 0xf: map_key_clear(KEY_RESTART); break;
 827			default: goto unknown;
 828			}
 829			break;
 830		}
 831
 832		if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
 833			switch (usage->hid) {
 834			case HID_GD_UP:	   usage->hat_dir = 1; break;
 835			case HID_GD_DOWN:  usage->hat_dir = 5; break;
 836			case HID_GD_RIGHT: usage->hat_dir = 3; break;
 837			case HID_GD_LEFT:  usage->hat_dir = 7; break;
 838			case HID_GD_DO_NOT_DISTURB:
 839				map_key_clear(KEY_DO_NOT_DISTURB); break;
 840			default: goto unknown;
 841			}
 842
 843			if (usage->hid <= HID_GD_LEFT) {
 844				if (field->dpad) {
 845					map_abs(field->dpad);
 846					goto ignore;
 847				}
 848				map_abs(ABS_HAT0X);
 849			}
 850			break;
 851		}
 852
 853		if ((usage->hid & 0xf0) == 0xa0) {	/* SystemControl */
 854			switch (usage->hid & 0xf) {
 855			case 0x9: map_key_clear(KEY_MICMUTE); break;
 856			case 0xa: map_key_clear(KEY_ACCESSIBILITY); break;
 857			default: goto ignore;
 858			}
 859			break;
 860		}
 861
 862		if ((usage->hid & 0xf0) == 0xb0) {	/* SC - Display */
 863			switch (usage->hid & 0xf) {
 864			case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 865			default: goto ignore;
 866			}
 867			break;
 868		}
 869
 870		/*
 871		 * Some lazy vendors declare 255 usages for System Control,
 872		 * leading to the creation of ABS_X|Y axis and too many others.
 873		 * It wouldn't be a problem if joydev doesn't consider the
 874		 * device as a joystick then.
 875		 */
 876		if (field->application == HID_GD_SYSTEM_CONTROL)
 877			goto ignore;
 878
 879		switch (usage->hid) {
 880		/* These usage IDs map directly to the usage codes. */
 881		case HID_GD_X: case HID_GD_Y:
 882		case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 883			if (field->flags & HID_MAIN_ITEM_RELATIVE)
 884				map_rel(usage->hid & 0xf);
 885			else
 886				map_abs_clear(usage->hid & 0xf);
 887			break;
 888
 889		case HID_GD_Z:
 890			/* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */
 891			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 892				map_rel(usage->hid & 0xf);
 893			} else {
 894				if (field->application == HID_DG_PEN ||
 895				    field->physical == HID_DG_PEN ||
 896				    field->logical == HID_DG_STYLUS ||
 897				    field->physical == HID_DG_STYLUS ||
 898				    field->application == HID_DG_DIGITIZER)
 899					map_abs_clear(ABS_DISTANCE);
 900				else
 901					map_abs_clear(usage->hid & 0xf);
 902			}
 903			break;
 904
 905		case HID_GD_WHEEL:
 906			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 907				set_bit(REL_WHEEL, input->relbit);
 908				map_rel(REL_WHEEL_HI_RES);
 909			} else {
 910				map_abs(usage->hid & 0xf);
 911			}
 912			break;
 913		case HID_GD_SLIDER: case HID_GD_DIAL:
 914			if (field->flags & HID_MAIN_ITEM_RELATIVE)
 915				map_rel(usage->hid & 0xf);
 916			else
 917				map_abs(usage->hid & 0xf);
 918			break;
 919
 920		case HID_GD_HATSWITCH:
 921			usage->hat_min = field->logical_minimum;
 922			usage->hat_max = field->logical_maximum;
 923			map_abs(ABS_HAT0X);
 924			break;
 925
 926		case HID_GD_START:	map_key_clear(BTN_START);	break;
 927		case HID_GD_SELECT:	map_key_clear(BTN_SELECT);	break;
 928
 929		case HID_GD_RFKILL_BTN:
 930			/* MS wireless radio ctl extension, also check CA */
 931			if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 932				map_key_clear(KEY_RFKILL);
 933				/* We need to simulate the btn release */
 934				field->flags |= HID_MAIN_ITEM_RELATIVE;
 935				break;
 936			}
 937			goto unknown;
 938
 939		default: goto unknown;
 940		}
 941
 942		break;
 943
 944	case HID_UP_LED:
 945		switch (usage->hid & 0xffff) {		      /* HID-Value:                   */
 946		case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 947		case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 948		case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 949		case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 950		case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 951		case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 952		case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 953		case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 954		case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 955		case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 956		case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 957
 958		default: goto ignore;
 959		}
 960		break;
 961
 962	case HID_UP_DIGITIZER:
 963		if ((field->application & 0xff) == 0x01) /* Digitizer */
 964			__set_bit(INPUT_PROP_POINTER, input->propbit);
 965		else if ((field->application & 0xff) == 0x02) /* Pen */
 966			__set_bit(INPUT_PROP_DIRECT, input->propbit);
 967
 968		switch (usage->hid & 0xff) {
 969		case 0x00: /* Undefined */
 970			goto ignore;
 971
 972		case 0x30: /* TipPressure */
 973			if (!test_bit(BTN_TOUCH, input->keybit)) {
 974				device->quirks |= HID_QUIRK_NOTOUCH;
 975				set_bit(EV_KEY, input->evbit);
 976				set_bit(BTN_TOUCH, input->keybit);
 977			}
 978			map_abs_clear(ABS_PRESSURE);
 979			break;
 980
 981		case 0x32: /* InRange */
 982			switch (field->physical) {
 983			case HID_DG_PUCK:
 984				map_key(BTN_TOOL_MOUSE);
 985				break;
 986			case HID_DG_FINGER:
 987				map_key(BTN_TOOL_FINGER);
 988				break;
 989			default:
 990				/*
 991				 * If the physical is not given,
 992				 * rely on the application.
 993				 */
 994				if (!field->physical) {
 995					switch (field->application) {
 996					case HID_DG_TOUCHSCREEN:
 997					case HID_DG_TOUCHPAD:
 998						map_key_clear(BTN_TOOL_FINGER);
 999						break;
1000					default:
1001						map_key_clear(BTN_TOOL_PEN);
1002					}
1003				} else {
1004					map_key(BTN_TOOL_PEN);
1005				}
1006				break;
1007			}
1008			break;
1009
1010		case 0x3b: /* Battery Strength */
1011			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1012			usage->type = EV_PWR;
1013			return;
1014
1015		case 0x3c: /* Invert */
1016			device->quirks &= ~HID_QUIRK_NOINVERT;
1017			map_key_clear(BTN_TOOL_RUBBER);
1018			break;
1019
1020		case 0x3d: /* X Tilt */
1021			map_abs_clear(ABS_TILT_X);
1022			break;
1023
1024		case 0x3e: /* Y Tilt */
1025			map_abs_clear(ABS_TILT_Y);
1026			break;
1027
1028		case 0x33: /* Touch */
1029		case 0x42: /* TipSwitch */
1030		case 0x43: /* TipSwitch2 */
1031			device->quirks &= ~HID_QUIRK_NOTOUCH;
1032			map_key_clear(BTN_TOUCH);
1033			break;
1034
1035		case 0x44: /* BarrelSwitch */
1036			map_key_clear(BTN_STYLUS);
1037			break;
1038
1039		case 0x45: /* ERASER */
1040			/*
1041			 * This event is reported when eraser tip touches the surface.
1042			 * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1043			 * by Invert if tool reports proximity or by Eraser directly.
1044			 */
1045			if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1046				device->quirks |= HID_QUIRK_NOINVERT;
1047				set_bit(BTN_TOOL_RUBBER, input->keybit);
1048			}
1049			map_key_clear(BTN_TOUCH);
1050			break;
1051
1052		case 0x46: /* TabletPick */
1053		case 0x5a: /* SecondaryBarrelSwitch */
1054			map_key_clear(BTN_STYLUS2);
1055			break;
1056
1057		case 0x5b: /* TransducerSerialNumber */
1058		case 0x6e: /* TransducerSerialNumber2 */
1059			map_msc(MSC_SERIAL);
1060			break;
1061
1062		default:  goto unknown;
1063		}
1064		break;
1065
1066	case HID_UP_TELEPHONY:
1067		switch (usage->hid & HID_USAGE) {
1068		case 0x2f: map_key_clear(KEY_MICMUTE);		break;
1069		case 0xb0: map_key_clear(KEY_NUMERIC_0);	break;
1070		case 0xb1: map_key_clear(KEY_NUMERIC_1);	break;
1071		case 0xb2: map_key_clear(KEY_NUMERIC_2);	break;
1072		case 0xb3: map_key_clear(KEY_NUMERIC_3);	break;
1073		case 0xb4: map_key_clear(KEY_NUMERIC_4);	break;
1074		case 0xb5: map_key_clear(KEY_NUMERIC_5);	break;
1075		case 0xb6: map_key_clear(KEY_NUMERIC_6);	break;
1076		case 0xb7: map_key_clear(KEY_NUMERIC_7);	break;
1077		case 0xb8: map_key_clear(KEY_NUMERIC_8);	break;
1078		case 0xb9: map_key_clear(KEY_NUMERIC_9);	break;
1079		case 0xba: map_key_clear(KEY_NUMERIC_STAR);	break;
1080		case 0xbb: map_key_clear(KEY_NUMERIC_POUND);	break;
1081		case 0xbc: map_key_clear(KEY_NUMERIC_A);	break;
1082		case 0xbd: map_key_clear(KEY_NUMERIC_B);	break;
1083		case 0xbe: map_key_clear(KEY_NUMERIC_C);	break;
1084		case 0xbf: map_key_clear(KEY_NUMERIC_D);	break;
1085		default: goto ignore;
1086		}
1087		break;
1088
1089	case HID_UP_CONSUMER:	/* USB HUT v1.12, pages 75-84 */
1090		switch (usage->hid & HID_USAGE) {
1091		case 0x000: goto ignore;
1092		case 0x030: map_key_clear(KEY_POWER);		break;
1093		case 0x031: map_key_clear(KEY_RESTART);		break;
1094		case 0x032: map_key_clear(KEY_SLEEP);		break;
1095		case 0x034: map_key_clear(KEY_SLEEP);		break;
1096		case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1097		case 0x036: map_key_clear(BTN_MISC);		break;
1098
1099		case 0x040: map_key_clear(KEY_MENU);		break; /* Menu */
1100		case 0x041: map_key_clear(KEY_SELECT);		break; /* Menu Pick */
1101		case 0x042: map_key_clear(KEY_UP);		break; /* Menu Up */
1102		case 0x043: map_key_clear(KEY_DOWN);		break; /* Menu Down */
1103		case 0x044: map_key_clear(KEY_LEFT);		break; /* Menu Left */
1104		case 0x045: map_key_clear(KEY_RIGHT);		break; /* Menu Right */
1105		case 0x046: map_key_clear(KEY_ESC);		break; /* Menu Escape */
1106		case 0x047: map_key_clear(KEY_KPPLUS);		break; /* Menu Value Increase */
1107		case 0x048: map_key_clear(KEY_KPMINUS);		break; /* Menu Value Decrease */
1108
1109		case 0x060: map_key_clear(KEY_INFO);		break; /* Data On Screen */
1110		case 0x061: map_key_clear(KEY_SUBTITLE);	break; /* Closed Caption */
1111		case 0x063: map_key_clear(KEY_VCR);		break; /* VCR/TV */
1112		case 0x065: map_key_clear(KEY_CAMERA);		break; /* Snapshot */
1113		case 0x069: map_key_clear(KEY_RED);		break;
1114		case 0x06a: map_key_clear(KEY_GREEN);		break;
1115		case 0x06b: map_key_clear(KEY_BLUE);		break;
1116		case 0x06c: map_key_clear(KEY_YELLOW);		break;
1117		case 0x06d: map_key_clear(KEY_ASPECT_RATIO);	break;
1118
1119		case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);		break;
1120		case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);		break;
1121		case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);	break;
1122		case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);		break;
1123		case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);		break;
1124		case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);		break;
1125
1126		case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);	break;
1127		case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);	break;
1128		case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);	break;
1129
1130		case 0x079: map_key_clear(KEY_KBDILLUMUP);	break;
1131		case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);	break;
1132		case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);	break;
1133
1134		case 0x082: map_key_clear(KEY_VIDEO_NEXT);	break;
1135		case 0x083: map_key_clear(KEY_LAST);		break;
1136		case 0x084: map_key_clear(KEY_ENTER);		break;
1137		case 0x088: map_key_clear(KEY_PC);		break;
1138		case 0x089: map_key_clear(KEY_TV);		break;
1139		case 0x08a: map_key_clear(KEY_WWW);		break;
1140		case 0x08b: map_key_clear(KEY_DVD);		break;
1141		case 0x08c: map_key_clear(KEY_PHONE);		break;
1142		case 0x08d: map_key_clear(KEY_PROGRAM);		break;
1143		case 0x08e: map_key_clear(KEY_VIDEOPHONE);	break;
1144		case 0x08f: map_key_clear(KEY_GAMES);		break;
1145		case 0x090: map_key_clear(KEY_MEMO);		break;
1146		case 0x091: map_key_clear(KEY_CD);		break;
1147		case 0x092: map_key_clear(KEY_VCR);		break;
1148		case 0x093: map_key_clear(KEY_TUNER);		break;
1149		case 0x094: map_key_clear(KEY_EXIT);		break;
1150		case 0x095: map_key_clear(KEY_HELP);		break;
1151		case 0x096: map_key_clear(KEY_TAPE);		break;
1152		case 0x097: map_key_clear(KEY_TV2);		break;
1153		case 0x098: map_key_clear(KEY_SAT);		break;
1154		case 0x09a: map_key_clear(KEY_PVR);		break;
1155
1156		case 0x09c: map_key_clear(KEY_CHANNELUP);	break;
1157		case 0x09d: map_key_clear(KEY_CHANNELDOWN);	break;
1158		case 0x0a0: map_key_clear(KEY_VCR2);		break;
1159
1160		case 0x0b0: map_key_clear(KEY_PLAY);		break;
1161		case 0x0b1: map_key_clear(KEY_PAUSE);		break;
1162		case 0x0b2: map_key_clear(KEY_RECORD);		break;
1163		case 0x0b3: map_key_clear(KEY_FASTFORWARD);	break;
1164		case 0x0b4: map_key_clear(KEY_REWIND);		break;
1165		case 0x0b5: map_key_clear(KEY_NEXTSONG);	break;
1166		case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);	break;
1167		case 0x0b7: map_key_clear(KEY_STOPCD);		break;
1168		case 0x0b8: map_key_clear(KEY_EJECTCD);		break;
1169		case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);	break;
1170		case 0x0b9: map_key_clear(KEY_SHUFFLE);		break;
1171		case 0x0bf: map_key_clear(KEY_SLOW);		break;
1172
1173		case 0x0cd: map_key_clear(KEY_PLAYPAUSE);	break;
1174		case 0x0cf: map_key_clear(KEY_VOICECOMMAND);	break;
1175
1176		case 0x0d8: map_key_clear(KEY_DICTATE);		break;
1177		case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);	break;
1178
1179		case 0x0e0: map_abs_clear(ABS_VOLUME);		break;
1180		case 0x0e2: map_key_clear(KEY_MUTE);		break;
1181		case 0x0e5: map_key_clear(KEY_BASSBOOST);	break;
1182		case 0x0e9: map_key_clear(KEY_VOLUMEUP);	break;
1183		case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);	break;
1184		case 0x0f5: map_key_clear(KEY_SLOW);		break;
1185
1186		case 0x181: map_key_clear(KEY_BUTTONCONFIG);	break;
1187		case 0x182: map_key_clear(KEY_BOOKMARKS);	break;
1188		case 0x183: map_key_clear(KEY_CONFIG);		break;
1189		case 0x184: map_key_clear(KEY_WORDPROCESSOR);	break;
1190		case 0x185: map_key_clear(KEY_EDITOR);		break;
1191		case 0x186: map_key_clear(KEY_SPREADSHEET);	break;
1192		case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);	break;
1193		case 0x188: map_key_clear(KEY_PRESENTATION);	break;
1194		case 0x189: map_key_clear(KEY_DATABASE);	break;
1195		case 0x18a: map_key_clear(KEY_MAIL);		break;
1196		case 0x18b: map_key_clear(KEY_NEWS);		break;
1197		case 0x18c: map_key_clear(KEY_VOICEMAIL);	break;
1198		case 0x18d: map_key_clear(KEY_ADDRESSBOOK);	break;
1199		case 0x18e: map_key_clear(KEY_CALENDAR);	break;
1200		case 0x18f: map_key_clear(KEY_TASKMANAGER);	break;
1201		case 0x190: map_key_clear(KEY_JOURNAL);		break;
1202		case 0x191: map_key_clear(KEY_FINANCE);		break;
1203		case 0x192: map_key_clear(KEY_CALC);		break;
1204		case 0x193: map_key_clear(KEY_PLAYER);		break;
1205		case 0x194: map_key_clear(KEY_FILE);		break;
1206		case 0x196: map_key_clear(KEY_WWW);		break;
1207		case 0x199: map_key_clear(KEY_CHAT);		break;
1208		case 0x19c: map_key_clear(KEY_LOGOFF);		break;
1209		case 0x19e: map_key_clear(KEY_COFFEE);		break;
1210		case 0x19f: map_key_clear(KEY_CONTROLPANEL);		break;
1211		case 0x1a2: map_key_clear(KEY_APPSELECT);		break;
1212		case 0x1a3: map_key_clear(KEY_NEXT);		break;
1213		case 0x1a4: map_key_clear(KEY_PREVIOUS);	break;
1214		case 0x1a6: map_key_clear(KEY_HELP);		break;
1215		case 0x1a7: map_key_clear(KEY_DOCUMENTS);	break;
1216		case 0x1ab: map_key_clear(KEY_SPELLCHECK);	break;
1217		case 0x1ae: map_key_clear(KEY_KEYBOARD);	break;
1218		case 0x1b1: map_key_clear(KEY_SCREENSAVER);		break;
1219		case 0x1b4: map_key_clear(KEY_FILE);		break;
1220		case 0x1b6: map_key_clear(KEY_IMAGES);		break;
1221		case 0x1b7: map_key_clear(KEY_AUDIO);		break;
1222		case 0x1b8: map_key_clear(KEY_VIDEO);		break;
1223		case 0x1bc: map_key_clear(KEY_MESSENGER);	break;
1224		case 0x1bd: map_key_clear(KEY_INFO);		break;
1225		case 0x1cb: map_key_clear(KEY_ASSISTANT);	break;
1226		case 0x201: map_key_clear(KEY_NEW);		break;
1227		case 0x202: map_key_clear(KEY_OPEN);		break;
1228		case 0x203: map_key_clear(KEY_CLOSE);		break;
1229		case 0x204: map_key_clear(KEY_EXIT);		break;
1230		case 0x207: map_key_clear(KEY_SAVE);		break;
1231		case 0x208: map_key_clear(KEY_PRINT);		break;
1232		case 0x209: map_key_clear(KEY_PROPS);		break;
1233		case 0x21a: map_key_clear(KEY_UNDO);		break;
1234		case 0x21b: map_key_clear(KEY_COPY);		break;
1235		case 0x21c: map_key_clear(KEY_CUT);		break;
1236		case 0x21d: map_key_clear(KEY_PASTE);		break;
1237		case 0x21f: map_key_clear(KEY_FIND);		break;
1238		case 0x221: map_key_clear(KEY_SEARCH);		break;
1239		case 0x222: map_key_clear(KEY_GOTO);		break;
1240		case 0x223: map_key_clear(KEY_HOMEPAGE);	break;
1241		case 0x224: map_key_clear(KEY_BACK);		break;
1242		case 0x225: map_key_clear(KEY_FORWARD);		break;
1243		case 0x226: map_key_clear(KEY_STOP);		break;
1244		case 0x227: map_key_clear(KEY_REFRESH);		break;
1245		case 0x22a: map_key_clear(KEY_BOOKMARKS);	break;
1246		case 0x22d: map_key_clear(KEY_ZOOMIN);		break;
1247		case 0x22e: map_key_clear(KEY_ZOOMOUT);		break;
1248		case 0x22f: map_key_clear(KEY_ZOOMRESET);	break;
1249		case 0x232: map_key_clear(KEY_FULL_SCREEN);	break;
1250		case 0x233: map_key_clear(KEY_SCROLLUP);	break;
1251		case 0x234: map_key_clear(KEY_SCROLLDOWN);	break;
1252		case 0x238: /* AC Pan */
1253			set_bit(REL_HWHEEL, input->relbit);
1254			map_rel(REL_HWHEEL_HI_RES);
1255			break;
1256		case 0x23d: map_key_clear(KEY_EDIT);		break;
1257		case 0x25f: map_key_clear(KEY_CANCEL);		break;
1258		case 0x269: map_key_clear(KEY_INSERT);		break;
1259		case 0x26a: map_key_clear(KEY_DELETE);		break;
1260		case 0x279: map_key_clear(KEY_REDO);		break;
1261
1262		case 0x289: map_key_clear(KEY_REPLY);		break;
1263		case 0x28b: map_key_clear(KEY_FORWARDMAIL);	break;
1264		case 0x28c: map_key_clear(KEY_SEND);		break;
1265
1266		case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT);	break;
1267
1268		case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);	break;
1269
1270		case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);		break;
1271		case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);		break;
1272		case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);		break;
1273		case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);		break;
1274		case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);	break;
1275		case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);	break;
1276
1277		case 0x29f: map_key_clear(KEY_SCALE);		break;
1278
1279		default: map_key_clear(KEY_UNKNOWN);
1280		}
1281		break;
1282
1283	case HID_UP_GENDEVCTRLS:
1284		switch (usage->hid) {
1285		case HID_DC_BATTERYSTRENGTH:
1286			hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1287			usage->type = EV_PWR;
1288			return;
1289		}
1290		goto unknown;
1291
1292	case HID_UP_BATTERY:
1293		switch (usage->hid) {
1294		case HID_BAT_ABSOLUTESTATEOFCHARGE:
1295			hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1296			usage->type = EV_PWR;
1297			return;
1298		case HID_BAT_CHARGING:
1299			usage->type = EV_PWR;
1300			return;
1301		}
1302		goto unknown;
1303	case HID_UP_CAMERA:
1304		switch (usage->hid & HID_USAGE) {
1305		case 0x020:
1306			map_key_clear(KEY_CAMERA_FOCUS);	break;
1307		case 0x021:
1308			map_key_clear(KEY_CAMERA);		break;
1309		default:
1310			goto ignore;
1311		}
1312		break;
1313
1314	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
1315		set_bit(EV_REP, input->evbit);
1316		switch (usage->hid & HID_USAGE) {
1317		case 0x021: map_key_clear(KEY_PRINT);           break;
1318		case 0x070: map_key_clear(KEY_HP);		break;
1319		case 0x071: map_key_clear(KEY_CAMERA);		break;
1320		case 0x072: map_key_clear(KEY_SOUND);		break;
1321		case 0x073: map_key_clear(KEY_QUESTION);	break;
1322		case 0x080: map_key_clear(KEY_EMAIL);		break;
1323		case 0x081: map_key_clear(KEY_CHAT);		break;
1324		case 0x082: map_key_clear(KEY_SEARCH);		break;
1325		case 0x083: map_key_clear(KEY_CONNECT);	        break;
1326		case 0x084: map_key_clear(KEY_FINANCE);		break;
1327		case 0x085: map_key_clear(KEY_SPORT);		break;
1328		case 0x086: map_key_clear(KEY_SHOP);	        break;
1329		default:    goto ignore;
1330		}
1331		break;
1332
1333	case HID_UP_HPVENDOR2:
1334		set_bit(EV_REP, input->evbit);
1335		switch (usage->hid & HID_USAGE) {
1336		case 0x001: map_key_clear(KEY_MICMUTE);		break;
1337		case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);	break;
1338		case 0x004: map_key_clear(KEY_BRIGHTNESSUP);	break;
1339		default:    goto ignore;
1340		}
1341		break;
1342
1343	case HID_UP_MSVENDOR:
1344		goto ignore;
1345
1346	case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1347		set_bit(EV_REP, input->evbit);
1348		goto ignore;
1349
1350	case HID_UP_LOGIVENDOR:
1351		/* intentional fallback */
1352	case HID_UP_LOGIVENDOR2:
1353		/* intentional fallback */
1354	case HID_UP_LOGIVENDOR3:
1355		goto ignore;
1356
1357	case HID_UP_PID:
1358		switch (usage->hid & HID_USAGE) {
1359		case 0xa4: map_key_clear(BTN_DEAD);	break;
1360		default: goto ignore;
1361		}
1362		break;
1363
1364	default:
1365	unknown:
1366		if (field->report_size == 1) {
1367			if (field->report->type == HID_OUTPUT_REPORT) {
1368				map_led(LED_MISC);
1369				break;
1370			}
1371			map_key(BTN_MISC);
1372			break;
1373		}
1374		if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1375			map_rel(REL_MISC);
1376			break;
1377		}
1378		map_abs(ABS_MISC);
1379		break;
1380	}
1381
1382mapped:
1383	/* Mapping failed, bail out */
1384	if (!bit)
1385		return;
1386
1387	if (device->driver->input_mapped &&
1388	    device->driver->input_mapped(device, hidinput, field, usage,
1389					 &bit, &max) < 0) {
1390		/*
1391		 * The driver indicated that no further generic handling
1392		 * of the usage is desired.
1393		 */
1394		return;
1395	}
1396
1397	set_bit(usage->type, input->evbit);
1398
1399	/*
1400	 * This part is *really* controversial:
1401	 * - HID aims at being generic so we should do our best to export
1402	 *   all incoming events
1403	 * - HID describes what events are, so there is no reason for ABS_X
1404	 *   to be mapped to ABS_Y
1405	 * - HID is using *_MISC+N as a default value, but nothing prevents
1406	 *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1407	 *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1408	 *   processing)
1409	 *
1410	 * If devices still want to use this (at their own risk), they will
1411	 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1412	 * the default should be a reliable mapping.
1413	 */
1414	while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1415		if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1416			usage->code = find_next_zero_bit(bit,
1417							 max + 1,
1418							 usage->code);
1419		} else {
1420			device->status |= HID_STAT_DUP_DETECTED;
1421			goto ignore;
1422		}
1423	}
1424
1425	if (usage->code > max)
1426		goto ignore;
1427
1428	if (usage->type == EV_ABS) {
1429
1430		int a = field->logical_minimum;
1431		int b = field->logical_maximum;
1432
1433		if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1434			a = field->logical_minimum = 0;
1435			b = field->logical_maximum = 255;
1436		}
1437
1438		if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1439			input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1440		else	input_set_abs_params(input, usage->code, a, b, 0, 0);
1441
1442		input_abs_set_res(input, usage->code,
1443				  hidinput_calc_abs_res(field, usage->code));
1444
1445		/* use a larger default input buffer for MT devices */
1446		if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1447			input_set_events_per_packet(input, 60);
1448	}
1449
1450	if (usage->type == EV_ABS &&
1451	    (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1452		int i;
1453		for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1454			input_set_abs_params(input, i, -1, 1, 0, 0);
1455			set_bit(i, input->absbit);
1456		}
1457		if (usage->hat_dir && !field->dpad)
1458			field->dpad = usage->code;
1459	}
1460
1461	/* for those devices which produce Consumer volume usage as relative,
1462	 * we emulate pressing volumeup/volumedown appropriate number of times
1463	 * in hidinput_hid_event()
1464	 */
1465	if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1466			(usage->code == ABS_VOLUME)) {
1467		set_bit(KEY_VOLUMEUP, input->keybit);
1468		set_bit(KEY_VOLUMEDOWN, input->keybit);
1469	}
1470
1471	if (usage->type == EV_KEY) {
1472		set_bit(EV_MSC, input->evbit);
1473		set_bit(MSC_SCAN, input->mscbit);
1474	}
1475
1476	return;
1477
1478ignore:
1479	usage->type = 0;
1480	usage->code = 0;
1481}
1482
1483static void hidinput_handle_scroll(struct hid_usage *usage,
1484				   struct input_dev *input,
1485				   __s32 value)
1486{
1487	int code;
1488	int hi_res, lo_res;
1489
1490	if (value == 0)
1491		return;
1492
1493	if (usage->code == REL_WHEEL_HI_RES)
1494		code = REL_WHEEL;
1495	else
1496		code = REL_HWHEEL;
1497
1498	/*
1499	 * Windows reports one wheel click as value 120. Where a high-res
1500	 * scroll wheel is present, a fraction of 120 is reported instead.
1501	 * Our REL_WHEEL_HI_RES axis does the same because all HW must
1502	 * adhere to the 120 expectation.
1503	 */
1504	hi_res = value * 120/usage->resolution_multiplier;
1505
1506	usage->wheel_accumulated += hi_res;
1507	lo_res = usage->wheel_accumulated/120;
1508	if (lo_res)
1509		usage->wheel_accumulated -= lo_res * 120;
1510
1511	input_event(input, EV_REL, code, lo_res);
1512	input_event(input, EV_REL, usage->code, hi_res);
1513}
1514
1515static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1516				    unsigned int tool)
1517{
1518	/* if the given tool is not currently reported, ignore */
1519	if (!test_bit(tool, input->key))
1520		return;
1521
1522	/*
1523	 * if the given tool was previously set, release it,
1524	 * release any TOUCH and send an EV_SYN
1525	 */
1526	input_event(input, EV_KEY, BTN_TOUCH, 0);
1527	input_event(input, EV_KEY, tool, 0);
1528	input_event(input, EV_SYN, SYN_REPORT, 0);
1529
1530	report->tool = 0;
1531}
1532
1533static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1534				unsigned int new_tool)
1535{
1536	if (report->tool != new_tool)
1537		hid_report_release_tool(report, input, report->tool);
1538
1539	input_event(input, EV_KEY, new_tool, 1);
1540	report->tool = new_tool;
1541}
1542
1543void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1544{
1545	struct input_dev *input;
1546	struct hid_report *report = field->report;
1547	unsigned *quirks = &hid->quirks;
1548
1549	if (!usage->type)
1550		return;
1551
1552	if (usage->type == EV_PWR) {
1553		hidinput_update_battery(hid, usage->hid, value);
1554		return;
1555	}
1556
1557	if (!field->hidinput)
1558		return;
1559
1560	input = field->hidinput->input;
1561
1562	if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1563		int hat_dir = usage->hat_dir;
1564		if (!hat_dir)
1565			hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1566		if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1567		input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1568		input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1569		return;
1570	}
1571
1572	/*
1573	 * Ignore out-of-range values as per HID specification,
1574	 * section 5.10 and 6.2.25, when NULL state bit is present.
1575	 * When it's not, clamp the value to match Microsoft's input
1576	 * driver as mentioned in "Required HID usages for digitizers":
1577	 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1578	 *
1579	 * The logical_minimum < logical_maximum check is done so that we
1580	 * don't unintentionally discard values sent by devices which
1581	 * don't specify logical min and max.
1582	 */
1583	if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1584	    field->logical_minimum < field->logical_maximum) {
1585		if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1586		    (value < field->logical_minimum ||
1587		     value > field->logical_maximum)) {
1588			dbg_hid("Ignoring out-of-range value %x\n", value);
1589			return;
1590		}
1591		value = clamp(value,
1592			      field->logical_minimum,
1593			      field->logical_maximum);
1594	}
1595
1596	switch (usage->hid) {
1597	case HID_DG_ERASER:
1598		report->tool_active |= !!value;
1599
1600		/*
1601		 * if eraser is set, we must enforce BTN_TOOL_RUBBER
1602		 * to accommodate for devices not following the spec.
1603		 */
1604		if (value)
1605			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1606		else if (report->tool != BTN_TOOL_RUBBER)
1607			/* value is off, tool is not rubber, ignore */
1608			return;
1609		else if (*quirks & HID_QUIRK_NOINVERT &&
1610			 !test_bit(BTN_TOUCH, input->key)) {
1611			/*
1612			 * There is no invert to release the tool, let hid_input
1613			 * send BTN_TOUCH with scancode and release the tool after.
1614			 */
1615			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1616			return;
1617		}
1618
1619		/* let hid-input set BTN_TOUCH */
1620		break;
1621
1622	case HID_DG_INVERT:
1623		report->tool_active |= !!value;
1624
1625		/*
1626		 * If invert is set, we store BTN_TOOL_RUBBER.
1627		 */
1628		if (value)
1629			hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1630		else if (!report->tool_active)
1631			/* tool_active not set means Invert and Eraser are not set */
1632			hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1633
1634		/* no further processing */
1635		return;
1636
1637	case HID_DG_INRANGE:
1638		report->tool_active |= !!value;
1639
1640		if (report->tool_active) {
1641			/*
1642			 * if tool is not set but is marked as active,
1643			 * assume ours
1644			 */
1645			if (!report->tool)
1646				report->tool = usage->code;
1647
1648			/* drivers may have changed the value behind our back, resend it */
1649			hid_report_set_tool(report, input, report->tool);
1650		} else {
1651			hid_report_release_tool(report, input, usage->code);
1652		}
1653
1654		/* reset tool_active for the next event */
1655		report->tool_active = false;
1656
1657		/* no further processing */
1658		return;
1659
1660	case HID_DG_TIPSWITCH:
1661		report->tool_active |= !!value;
1662
1663		/* if tool is set to RUBBER we should ignore the current value */
1664		if (report->tool == BTN_TOOL_RUBBER)
1665			return;
1666
1667		break;
1668
1669	case HID_DG_TIPPRESSURE:
1670		if (*quirks & HID_QUIRK_NOTOUCH) {
1671			int a = field->logical_minimum;
1672			int b = field->logical_maximum;
1673
1674			if (value > a + ((b - a) >> 3)) {
1675				input_event(input, EV_KEY, BTN_TOUCH, 1);
1676				report->tool_active = true;
1677			}
1678		}
1679		break;
1680
1681	case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1682		dbg_hid("Maximum Effects - %d\n",value);
1683		return;
1684
1685	case HID_UP_PID | 0x7fUL:
1686		dbg_hid("PID Pool Report\n");
1687		return;
1688	}
1689
1690	switch (usage->type) {
1691	case EV_KEY:
1692		if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1693			return;
1694		break;
1695
1696	case EV_REL:
1697		if (usage->code == REL_WHEEL_HI_RES ||
1698		    usage->code == REL_HWHEEL_HI_RES) {
1699			hidinput_handle_scroll(usage, input, value);
1700			return;
1701		}
1702		break;
1703
1704	case EV_ABS:
1705		if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1706		    usage->code == ABS_VOLUME) {
1707			int count = abs(value);
1708			int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1709			int i;
1710
1711			for (i = 0; i < count; i++) {
1712				input_event(input, EV_KEY, direction, 1);
1713				input_sync(input);
1714				input_event(input, EV_KEY, direction, 0);
1715				input_sync(input);
1716			}
1717			return;
1718
1719		} else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1720			   ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1721			value = field->logical_maximum - value;
1722		break;
1723	}
1724
1725	/*
1726	 * Ignore reports for absolute data if the data didn't change. This is
1727	 * not only an optimization but also fixes 'dead' key reports. Some
1728	 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1729	 * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1730	 * can only have one of them physically available. The 'dead' keys
1731	 * report constant 0. As all map to the same keycode, they'd confuse
1732	 * the input layer. If we filter the 'dead' keys on the HID level, we
1733	 * skip the keycode translation and only forward real events.
1734	 */
1735	if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1736	                      HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1737			      (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1738	    usage->usage_index < field->maxusage &&
1739	    value == field->value[usage->usage_index])
1740		return;
1741
1742	/* report the usage code as scancode if the key status has changed */
1743	if (usage->type == EV_KEY &&
1744	    (!test_bit(usage->code, input->key)) == value)
1745		input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1746
1747	input_event(input, usage->type, usage->code, value);
1748
1749	if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1750	    usage->type == EV_KEY && value) {
1751		input_sync(input);
1752		input_event(input, usage->type, usage->code, 0);
1753	}
1754}
1755
1756void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1757{
1758	struct hid_input *hidinput;
1759
1760	if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1761		return;
1762
1763	list_for_each_entry(hidinput, &hid->inputs, list)
1764		input_sync(hidinput->input);
1765}
1766EXPORT_SYMBOL_GPL(hidinput_report_event);
1767
1768static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1769			       unsigned int code, struct hid_field **field)
1770{
1771	struct hid_report *report;
1772	int i, j;
1773
1774	list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1775		for (i = 0; i < report->maxfield; i++) {
1776			*field = report->field[i];
1777			for (j = 0; j < (*field)->maxusage; j++)
1778				if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1779					return j;
1780		}
1781	}
1782	return -1;
1783}
1784
1785struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1786{
1787	struct hid_report *report;
1788	struct hid_field *field;
1789	int i, j;
1790
1791	list_for_each_entry(report,
1792			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1793			    list) {
1794		for (i = 0; i < report->maxfield; i++) {
1795			field = report->field[i];
1796			for (j = 0; j < field->maxusage; j++)
1797				if (field->usage[j].type == EV_LED)
1798					return field;
1799		}
1800	}
1801	return NULL;
1802}
1803EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1804
1805unsigned int hidinput_count_leds(struct hid_device *hid)
1806{
1807	struct hid_report *report;
1808	struct hid_field *field;
1809	int i, j;
1810	unsigned int count = 0;
1811
1812	list_for_each_entry(report,
1813			    &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1814			    list) {
1815		for (i = 0; i < report->maxfield; i++) {
1816			field = report->field[i];
1817			for (j = 0; j < field->maxusage; j++)
1818				if (field->usage[j].type == EV_LED &&
1819				    field->value[j])
1820					count += 1;
1821		}
1822	}
1823	return count;
1824}
1825EXPORT_SYMBOL_GPL(hidinput_count_leds);
1826
1827static void hidinput_led_worker(struct work_struct *work)
1828{
1829	struct hid_device *hid = container_of(work, struct hid_device,
1830					      led_work);
1831	struct hid_field *field;
1832	struct hid_report *report;
1833	int ret;
1834	u32 len;
1835	__u8 *buf;
1836
1837	field = hidinput_get_led_field(hid);
1838	if (!field)
1839		return;
1840
1841	/*
1842	 * field->report is accessed unlocked regarding HID core. So there might
1843	 * be another incoming SET-LED request from user-space, which changes
1844	 * the LED state while we assemble our outgoing buffer. However, this
1845	 * doesn't matter as hid_output_report() correctly converts it into a
1846	 * boolean value no matter what information is currently set on the LED
1847	 * field (even garbage). So the remote device will always get a valid
1848	 * request.
1849	 * And in case we send a wrong value, a next led worker is spawned
1850	 * for every SET-LED request so the following worker will send the
1851	 * correct value, guaranteed!
1852	 */
1853
1854	report = field->report;
1855
1856	/* use custom SET_REPORT request if possible (asynchronous) */
1857	if (hid->ll_driver->request)
1858		return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1859
1860	/* fall back to generic raw-output-report */
1861	len = hid_report_len(report);
1862	buf = hid_alloc_report_buf(report, GFP_KERNEL);
1863	if (!buf)
1864		return;
1865
1866	hid_output_report(report, buf);
1867	/* synchronous output report */
1868	ret = hid_hw_output_report(hid, buf, len);
1869	if (ret == -ENOSYS)
1870		hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1871				HID_REQ_SET_REPORT);
1872	kfree(buf);
1873}
1874
1875static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1876				unsigned int code, int value)
1877{
1878	struct hid_device *hid = input_get_drvdata(dev);
1879	struct hid_field *field;
1880	int offset;
1881
1882	if (type == EV_FF)
1883		return input_ff_event(dev, type, code, value);
1884
1885	if (type != EV_LED)
1886		return -1;
1887
1888	if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1889		hid_warn(dev, "event field not found\n");
1890		return -1;
1891	}
1892
1893	hid_set_field(field, offset, value);
1894
1895	schedule_work(&hid->led_work);
1896	return 0;
1897}
1898
1899static int hidinput_open(struct input_dev *dev)
1900{
1901	struct hid_device *hid = input_get_drvdata(dev);
1902
1903	return hid_hw_open(hid);
1904}
1905
1906static void hidinput_close(struct input_dev *dev)
1907{
1908	struct hid_device *hid = input_get_drvdata(dev);
1909
1910	hid_hw_close(hid);
1911}
1912
1913static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1914		struct hid_report *report, bool use_logical_max)
1915{
1916	struct hid_usage *usage;
1917	bool update_needed = false;
1918	bool get_report_completed = false;
1919	int i, j;
1920
1921	if (report->maxfield == 0)
1922		return false;
1923
1924	for (i = 0; i < report->maxfield; i++) {
1925		__s32 value = use_logical_max ?
1926			      report->field[i]->logical_maximum :
1927			      report->field[i]->logical_minimum;
1928
1929		/* There is no good reason for a Resolution
1930		 * Multiplier to have a count other than 1.
1931		 * Ignore that case.
1932		 */
1933		if (report->field[i]->report_count != 1)
1934			continue;
1935
1936		for (j = 0; j < report->field[i]->maxusage; j++) {
1937			usage = &report->field[i]->usage[j];
1938
1939			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1940				continue;
1941
1942			/*
1943			 * If we have more than one feature within this
1944			 * report we need to fill in the bits from the
1945			 * others before we can overwrite the ones for the
1946			 * Resolution Multiplier.
1947			 *
1948			 * But if we're not allowed to read from the device,
1949			 * we just bail. Such a device should not exist
1950			 * anyway.
1951			 */
1952			if (!get_report_completed && report->maxfield > 1) {
1953				if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1954					return update_needed;
1955
1956				hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1957				hid_hw_wait(hid);
1958				get_report_completed = true;
1959			}
1960
1961			report->field[i]->value[j] = value;
1962			update_needed = true;
1963		}
1964	}
1965
1966	return update_needed;
1967}
1968
1969static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1970{
1971	struct hid_report_enum *rep_enum;
1972	struct hid_report *rep;
1973	int ret;
1974
1975	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1976	list_for_each_entry(rep, &rep_enum->report_list, list) {
1977		bool update_needed = __hidinput_change_resolution_multipliers(hid,
1978								     rep, true);
1979
1980		if (update_needed) {
1981			ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1982			if (ret) {
1983				__hidinput_change_resolution_multipliers(hid,
1984								    rep, false);
1985				return;
1986			}
1987		}
1988	}
1989
1990	/* refresh our structs */
1991	hid_setup_resolution_multiplier(hid);
1992}
1993
1994static void report_features(struct hid_device *hid)
1995{
1996	struct hid_driver *drv = hid->driver;
1997	struct hid_report_enum *rep_enum;
1998	struct hid_report *rep;
1999	struct hid_usage *usage;
2000	int i, j;
2001
2002	rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
2003	list_for_each_entry(rep, &rep_enum->report_list, list)
2004		for (i = 0; i < rep->maxfield; i++) {
2005			/* Ignore if report count is out of bounds. */
2006			if (rep->field[i]->report_count < 1)
2007				continue;
2008
2009			for (j = 0; j < rep->field[i]->maxusage; j++) {
2010				usage = &rep->field[i]->usage[j];
2011
2012				/* Verify if Battery Strength feature is available */
2013				if (usage->hid == HID_DC_BATTERYSTRENGTH)
2014					hidinput_setup_battery(hid, HID_FEATURE_REPORT,
2015							       rep->field[i], false);
2016
2017				if (drv->feature_mapping)
2018					drv->feature_mapping(hid, rep->field[i], usage);
2019			}
2020		}
2021}
2022
2023static struct hid_input *hidinput_allocate(struct hid_device *hid,
2024					   unsigned int application)
2025{
2026	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2027	struct input_dev *input_dev = input_allocate_device();
2028	const char *suffix = NULL;
2029	size_t suffix_len, name_len;
2030
2031	if (!hidinput || !input_dev)
2032		goto fail;
2033
2034	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2035	    hid->maxapplication > 1) {
2036		switch (application) {
2037		case HID_GD_KEYBOARD:
2038			suffix = "Keyboard";
2039			break;
2040		case HID_GD_KEYPAD:
2041			suffix = "Keypad";
2042			break;
2043		case HID_GD_MOUSE:
2044			suffix = "Mouse";
2045			break;
2046		case HID_DG_PEN:
2047			/*
2048			 * yes, there is an issue here:
2049			 *  DG_PEN -> "Stylus"
2050			 *  DG_STYLUS -> "Pen"
2051			 * But changing this now means users with config snippets
2052			 * will have to change it and the test suite will not be happy.
2053			 */
2054			suffix = "Stylus";
2055			break;
2056		case HID_DG_STYLUS:
2057			suffix = "Pen";
2058			break;
2059		case HID_DG_TOUCHSCREEN:
2060			suffix = "Touchscreen";
2061			break;
2062		case HID_DG_TOUCHPAD:
2063			suffix = "Touchpad";
2064			break;
2065		case HID_GD_SYSTEM_CONTROL:
2066			suffix = "System Control";
2067			break;
2068		case HID_CP_CONSUMER_CONTROL:
2069			suffix = "Consumer Control";
2070			break;
2071		case HID_GD_WIRELESS_RADIO_CTLS:
2072			suffix = "Wireless Radio Control";
2073			break;
2074		case HID_GD_SYSTEM_MULTIAXIS:
2075			suffix = "System Multi Axis";
2076			break;
2077		default:
2078			break;
2079		}
2080	}
2081
2082	if (suffix) {
2083		name_len = strlen(hid->name);
2084		suffix_len = strlen(suffix);
2085		if ((name_len < suffix_len) ||
2086		    strcmp(hid->name + name_len - suffix_len, suffix)) {
2087			hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2088						   hid->name, suffix);
2089			if (!hidinput->name)
2090				goto fail;
2091		}
2092	}
2093
2094	input_set_drvdata(input_dev, hid);
2095	input_dev->event = hidinput_input_event;
2096	input_dev->open = hidinput_open;
2097	input_dev->close = hidinput_close;
2098	input_dev->setkeycode = hidinput_setkeycode;
2099	input_dev->getkeycode = hidinput_getkeycode;
2100
2101	input_dev->name = hidinput->name ? hidinput->name : hid->name;
2102	input_dev->phys = hid->phys;
2103	input_dev->uniq = hid->uniq;
2104	input_dev->id.bustype = hid->bus;
2105	input_dev->id.vendor  = hid->vendor;
2106	input_dev->id.product = hid->product;
2107	input_dev->id.version = hid->version;
2108	input_dev->dev.parent = &hid->dev;
2109
2110	hidinput->input = input_dev;
2111	hidinput->application = application;
2112	list_add_tail(&hidinput->list, &hid->inputs);
2113
2114	INIT_LIST_HEAD(&hidinput->reports);
2115
2116	return hidinput;
2117
2118fail:
2119	kfree(hidinput);
2120	input_free_device(input_dev);
2121	hid_err(hid, "Out of memory during hid input probe\n");
2122	return NULL;
2123}
2124
2125static bool hidinput_has_been_populated(struct hid_input *hidinput)
2126{
2127	int i;
2128	unsigned long r = 0;
2129
2130	for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2131		r |= hidinput->input->evbit[i];
2132
2133	for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2134		r |= hidinput->input->keybit[i];
2135
2136	for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2137		r |= hidinput->input->relbit[i];
2138
2139	for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2140		r |= hidinput->input->absbit[i];
2141
2142	for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2143		r |= hidinput->input->mscbit[i];
2144
2145	for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2146		r |= hidinput->input->ledbit[i];
2147
2148	for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2149		r |= hidinput->input->sndbit[i];
2150
2151	for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2152		r |= hidinput->input->ffbit[i];
2153
2154	for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2155		r |= hidinput->input->swbit[i];
2156
2157	return !!r;
2158}
2159
2160static void hidinput_cleanup_hidinput(struct hid_device *hid,
2161		struct hid_input *hidinput)
2162{
2163	struct hid_report *report;
2164	int i, k;
2165
2166	list_del(&hidinput->list);
2167	input_free_device(hidinput->input);
2168	kfree(hidinput->name);
2169
2170	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2171		if (k == HID_OUTPUT_REPORT &&
2172			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2173			continue;
2174
2175		list_for_each_entry(report, &hid->report_enum[k].report_list,
2176				    list) {
2177
2178			for (i = 0; i < report->maxfield; i++)
2179				if (report->field[i]->hidinput == hidinput)
2180					report->field[i]->hidinput = NULL;
2181		}
2182	}
2183
2184	kfree(hidinput);
2185}
2186
2187static struct hid_input *hidinput_match(struct hid_report *report)
2188{
2189	struct hid_device *hid = report->device;
2190	struct hid_input *hidinput;
2191
2192	list_for_each_entry(hidinput, &hid->inputs, list) {
2193		if (hidinput->report &&
2194		    hidinput->report->id == report->id)
2195			return hidinput;
2196	}
2197
2198	return NULL;
2199}
2200
2201static struct hid_input *hidinput_match_application(struct hid_report *report)
2202{
2203	struct hid_device *hid = report->device;
2204	struct hid_input *hidinput;
2205
2206	list_for_each_entry(hidinput, &hid->inputs, list) {
2207		if (hidinput->application == report->application)
2208			return hidinput;
2209
2210		/*
2211		 * Keep SystemControl and ConsumerControl applications together
2212		 * with the main keyboard, if present.
2213		 */
2214		if ((report->application == HID_GD_SYSTEM_CONTROL ||
2215		     report->application == HID_CP_CONSUMER_CONTROL) &&
2216		    hidinput->application == HID_GD_KEYBOARD) {
2217			return hidinput;
2218		}
2219	}
2220
2221	return NULL;
2222}
2223
2224static inline void hidinput_configure_usages(struct hid_input *hidinput,
2225					     struct hid_report *report)
2226{
2227	int i, j, k;
2228	int first_field_index = 0;
2229	int slot_collection_index = -1;
2230	int prev_collection_index = -1;
2231	unsigned int slot_idx = 0;
2232	struct hid_field *field;
2233
2234	/*
2235	 * First tag all the fields that are part of a slot,
2236	 * a slot needs to have one Contact ID in the collection
2237	 */
2238	for (i = 0; i < report->maxfield; i++) {
2239		field = report->field[i];
2240
2241		/* ignore fields without usage */
2242		if (field->maxusage < 1)
2243			continue;
2244
2245		/*
2246		 * janitoring when collection_index changes
2247		 */
2248		if (prev_collection_index != field->usage->collection_index) {
2249			prev_collection_index = field->usage->collection_index;
2250			first_field_index = i;
2251		}
2252
2253		/*
2254		 * if we already found a Contact ID in the collection,
2255		 * tag and continue to the next.
2256		 */
2257		if (slot_collection_index == field->usage->collection_index) {
2258			field->slot_idx = slot_idx;
2259			continue;
2260		}
2261
2262		/* check if the current field has Contact ID */
2263		for (j = 0; j < field->maxusage; j++) {
2264			if (field->usage[j].hid == HID_DG_CONTACTID) {
2265				slot_collection_index = field->usage->collection_index;
2266				slot_idx++;
2267
2268				/*
2269				 * mark all previous fields and this one in the
2270				 * current collection to be slotted.
2271				 */
2272				for (k = first_field_index; k <= i; k++)
2273					report->field[k]->slot_idx = slot_idx;
2274				break;
2275			}
2276		}
2277	}
2278
2279	for (i = 0; i < report->maxfield; i++)
2280		for (j = 0; j < report->field[i]->maxusage; j++)
2281			hidinput_configure_usage(hidinput, report->field[i],
2282						 report->field[i]->usage + j,
2283						 j);
2284}
2285
2286/*
2287 * Register the input device; print a message.
2288 * Configure the input layer interface
2289 * Read all reports and initialize the absolute field values.
2290 */
2291
2292int hidinput_connect(struct hid_device *hid, unsigned int force)
2293{
2294	struct hid_driver *drv = hid->driver;
2295	struct hid_report *report;
2296	struct hid_input *next, *hidinput = NULL;
2297	unsigned int application;
2298	int i, k;
2299
2300	INIT_LIST_HEAD(&hid->inputs);
2301	INIT_WORK(&hid->led_work, hidinput_led_worker);
2302
2303	hid->status &= ~HID_STAT_DUP_DETECTED;
2304
2305	if (!force) {
2306		for (i = 0; i < hid->maxcollection; i++) {
2307			struct hid_collection *col = &hid->collection[i];
2308			if (col->type == HID_COLLECTION_APPLICATION ||
2309					col->type == HID_COLLECTION_PHYSICAL)
2310				if (IS_INPUT_APPLICATION(col->usage))
2311					break;
2312		}
2313
2314		if (i == hid->maxcollection)
2315			return -1;
2316	}
2317
2318	report_features(hid);
2319
2320	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2321		if (k == HID_OUTPUT_REPORT &&
2322			hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2323			continue;
2324
2325		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2326
2327			if (!report->maxfield)
2328				continue;
2329
2330			application = report->application;
2331
2332			/*
2333			 * Find the previous hidinput report attached
2334			 * to this report id.
2335			 */
2336			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2337				hidinput = hidinput_match(report);
2338			else if (hid->maxapplication > 1 &&
2339				 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2340				hidinput = hidinput_match_application(report);
2341
2342			if (!hidinput) {
2343				hidinput = hidinput_allocate(hid, application);
2344				if (!hidinput)
2345					goto out_unwind;
2346			}
2347
2348			hidinput_configure_usages(hidinput, report);
2349
2350			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2351				hidinput->report = report;
2352
2353			list_add_tail(&report->hidinput_list,
2354				      &hidinput->reports);
2355		}
2356	}
2357
2358	hidinput_change_resolution_multipliers(hid);
2359
2360	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2361		if (drv->input_configured &&
2362		    drv->input_configured(hid, hidinput))
2363			goto out_unwind;
2364
2365		if (!hidinput_has_been_populated(hidinput)) {
2366			/* no need to register an input device not populated */
2367			hidinput_cleanup_hidinput(hid, hidinput);
2368			continue;
2369		}
2370
2371		if (input_register_device(hidinput->input))
2372			goto out_unwind;
2373		hidinput->registered = true;
2374	}
2375
2376	if (list_empty(&hid->inputs)) {
2377		hid_dbg(hid, "No inputs registered, leaving\n");
2378		goto out_unwind;
2379	}
2380
2381	if (hid->status & HID_STAT_DUP_DETECTED)
2382		hid_dbg(hid,
2383			"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2384
2385	return 0;
2386
2387out_unwind:
2388	/* unwind the ones we already registered */
2389	hidinput_disconnect(hid);
2390
2391	return -1;
2392}
2393EXPORT_SYMBOL_GPL(hidinput_connect);
2394
2395void hidinput_disconnect(struct hid_device *hid)
2396{
2397	struct hid_input *hidinput, *next;
2398
2399	hidinput_cleanup_battery(hid);
2400
2401	list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2402		list_del(&hidinput->list);
2403		if (hidinput->registered)
2404			input_unregister_device(hidinput->input);
2405		else
2406			input_free_device(hidinput->input);
2407		kfree(hidinput->name);
2408		kfree(hidinput);
2409	}
2410
2411	/* led_work is spawned by input_dev callbacks, but doesn't access the
2412	 * parent input_dev at all. Once all input devices are removed, we
2413	 * know that led_work will never get restarted, so we can cancel it
2414	 * synchronously and are safe. */
2415	cancel_work_sync(&hid->led_work);
2416}
2417EXPORT_SYMBOL_GPL(hidinput_disconnect);
2418
2419void hidinput_reset_resume(struct hid_device *hid)
2420{
2421	/* renegotiate host-device shared state after reset */
2422	hidinput_change_resolution_multipliers(hid);
2423}
2424EXPORT_SYMBOL_GPL(hidinput_reset_resume);
2425
2426#ifdef CONFIG_HID_KUNIT_TEST
2427#include "hid-input-test.c"
2428#endif