drivers/hid/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
  27 static const unsigned char hid_keyboard[256] = {
  28           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  29          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  30           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  31          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  32          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  33         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  34          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  35         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  36         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  37         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
  38         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  39         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  40         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  41         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
  42          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  43         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  44 };
  45
  46 static const struct {
  47         __s32 x;
  48         __s32 y;
  49 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  50
  51 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  52 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  53 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  54 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
  55
  56 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  57                 &max, EV_ABS, (c))
  58 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  59                 &max, EV_KEY, (c))
  60
  61 static bool match_scancode(struct hid_usage *usage,
  62                            unsigned int cur_idx, unsigned int scancode)
  63 {
  64         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
  65 }
  66
  67 static bool match_keycode(struct hid_usage *usage,
  68                           unsigned int cur_idx, unsigned int keycode)
  69 {
  70         /*
  71          * We should exclude unmapped usages when doing lookup by keycode.
  72          */
  73         return (usage->type == EV_KEY && usage->code == keycode);
  74 }
  75
  76 static bool match_index(struct hid_usage *usage,
  77                         unsigned int cur_idx, unsigned int idx)
  78 {
  79         return cur_idx == idx;
  80 }
  81
  82 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
  83                                 unsigned int cur_idx, unsigned int val);
  84
  85 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
  86                                            hid_usage_cmp_t match,
  87                                            unsigned int value,
  88                                            unsigned int *usage_idx)
  89 {
  90         unsigned int i, j, k, cur_idx = 0;
  91         struct hid_report *report;
  92         struct hid_usage *usage;
  93
  94         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
  95                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
  96                         for (i = 0; i < report->maxfield; i++) {
  97                                 for (j = 0; j < report->field[i]->maxusage; j++) {
  98                                         usage = report->field[i]->usage + j;
  99                                         if (usage->type == EV_KEY || usage->type == 0) {
 100                                                 if (match(usage, cur_idx, value)) {
 101                                                         if (usage_idx)
 102                                                                 *usage_idx = cur_idx;
 103                                                         return usage;
 104                                                 }
 105                                                 cur_idx++;
 106                                         }
 107                                 }
 108                         }
 109                 }
 110         }
 111         return NULL;
 112 }
 113
 114 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 115                                         const struct input_keymap_entry *ke,
 116                                         unsigned int *index)
 117 {
 118         struct hid_usage *usage;
 119         unsigned int scancode;
 120
 121         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 122                 usage = hidinput_find_key(hid, match_index, ke->index, index);
 123         else if (input_scancode_to_scalar(ke, &scancode) == 0)
 124                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
 125         else
 126                 usage = NULL;
 127
 128         return usage;
 129 }
 130
 131 static int hidinput_getkeycode(struct input_dev *dev,
 132                                struct input_keymap_entry *ke)
 133 {
 134         struct hid_device *hid = input_get_drvdata(dev);
 135         struct hid_usage *usage;
 136         unsigned int scancode, index;
 137
 138         usage = hidinput_locate_usage(hid, ke, &index);
 139         if (usage) {
 140                 ke->keycode = usage->type == EV_KEY ?
 141                                 usage->code : KEY_RESERVED;
 142                 ke->index = index;
 143                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 144                 ke->len = sizeof(scancode);
 145                 memcpy(ke->scancode, &scancode, sizeof(scancode));
 146                 return 0;
 147         }
 148
 149         return -EINVAL;
 150 }
 151
 152 static int hidinput_setkeycode(struct input_dev *dev,
 153                                const struct input_keymap_entry *ke,
 154                                unsigned int *old_keycode)
 155 {
 156         struct hid_device *hid = input_get_drvdata(dev);
 157         struct hid_usage *usage;
 158
 159         usage = hidinput_locate_usage(hid, ke, NULL);
 160         if (usage) {
 161                 *old_keycode = usage->type == EV_KEY ?
 162                                 usage->code : KEY_RESERVED;
 163                 usage->code = ke->keycode;
 164
 165                 clear_bit(*old_keycode, dev->keybit);
 166                 set_bit(usage->code, dev->keybit);
 167                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
 168                         usage->code, usage->hid);
 169
 170                 /*
 171                  * Set the keybit for the old keycode if the old keycode is used
 172                  * by another key
 173                  */
 174                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 175                         set_bit(*old_keycode, dev->keybit);
 176
 177                 return 0;
 178         }
 179
 180         return -EINVAL;
 181 }
 182
 183
 184 /**
 185  * hidinput_calc_abs_res - calculate an absolute axis resolution
 186  * @field: the HID report field to calculate resolution for
 187  * @code: axis code
 188  *
 189  * The formula is:
 190  *                         (logical_maximum - logical_minimum)
 191  * resolution = ----------------------------------------------------------
 192  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 193  *
 194  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 195  *
 196  * Only exponent 1 length units are processed. Centimeters and inches are
 197  * converted to millimeters. Degrees are converted to radians.
 198  */
 199 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 200 {
 201         __s32 unit_exponent = field->unit_exponent;
 202         __s32 logical_extents = field->logical_maximum -
 203                                         field->logical_minimum;
 204         __s32 physical_extents = field->physical_maximum -
 205                                         field->physical_minimum;
 206         __s32 prev;
 207
 208         /* Check if the extents are sane */
 209         if (logical_extents <= 0 || physical_extents <= 0)
 210                 return 0;
 211
 212         /*
 213          * Verify and convert units.
 214          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 215          */
 216         switch (code) {
 217         case ABS_X:
 218         case ABS_Y:
 219         case ABS_Z:
 220         case ABS_MT_POSITION_X:
 221         case ABS_MT_POSITION_Y:
 222         case ABS_MT_TOOL_X:
 223         case ABS_MT_TOOL_Y:
 224         case ABS_MT_TOUCH_MAJOR:
 225         case ABS_MT_TOUCH_MINOR:
 226                 if (field->unit == 0x11) {              /* If centimeters */
 227                         /* Convert to millimeters */
 228                         unit_exponent += 1;
 229                 } else if (field->unit == 0x13) {       /* If inches */
 230                         /* Convert to millimeters */
 231                         prev = physical_extents;
 232                         physical_extents *= 254;
 233                         if (physical_extents < prev)
 234                                 return 0;
 235                         unit_exponent -= 1;
 236                 } else {
 237                         return 0;
 238                 }
 239                 break;
 240
 241         case ABS_RX:
 242         case ABS_RY:
 243         case ABS_RZ:
 244         case ABS_WHEEL:
 245         case ABS_TILT_X:
 246         case ABS_TILT_Y:
 247                 if (field->unit == 0x14) {              /* If degrees */
 248                         /* Convert to radians */
 249                         prev = logical_extents;
 250                         logical_extents *= 573;
 251                         if (logical_extents < prev)
 252                                 return 0;
 253                         unit_exponent += 1;
 254                 } else if (field->unit != 0x12) {       /* If not radians */
 255                         return 0;
 256                 }
 257                 break;
 258
 259         default:
 260                 return 0;
 261         }
 262
 263         /* Apply negative unit exponent */
 264         for (; unit_exponent < 0; unit_exponent++) {
 265                 prev = logical_extents;
 266                 logical_extents *= 10;
 267                 if (logical_extents < prev)
 268                         return 0;
 269         }
 270         /* Apply positive unit exponent */
 271         for (; unit_exponent > 0; unit_exponent--) {
 272                 prev = physical_extents;
 273                 physical_extents *= 10;
 274                 if (physical_extents < prev)
 275                         return 0;
 276         }
 277
 278         /* Calculate resolution */
 279         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 280 }
 281 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 282
 283 #ifdef CONFIG_HID_BATTERY_STRENGTH
 284 static enum power_supply_property hidinput_battery_props[] = {
 285         POWER_SUPPLY_PROP_PRESENT,
 286         POWER_SUPPLY_PROP_ONLINE,
 287         POWER_SUPPLY_PROP_CAPACITY,
 288         POWER_SUPPLY_PROP_MODEL_NAME,
 289         POWER_SUPPLY_PROP_STATUS,
 290         POWER_SUPPLY_PROP_SCOPE,
 291 };
 292
 293 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 294 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 295 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 296
 297 static const struct hid_device_id hid_battery_quirks[] = {
 298         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 299                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 300           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 301         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 302                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 303           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 304         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 305                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 306           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 307         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 308                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 309           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 310         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 311                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 312           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 313         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 314                 USB_DEVICE_ID_ELECOM_BM084),
 315           HID_BATTERY_QUIRK_IGNORE },
 316         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 317                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
 318           HID_BATTERY_QUIRK_IGNORE },
 319         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 320                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 321           HID_BATTERY_QUIRK_IGNORE },
 322         {}
 323 };
 324
 325 static unsigned find_battery_quirk(struct hid_device *hdev)
 326 {
 327         unsigned quirks = 0;
 328         const struct hid_device_id *match;
 329
 330         match = hid_match_id(hdev, hid_battery_quirks);
 331         if (match != NULL)
 332                 quirks = match->driver_data;
 333
 334         return quirks;
 335 }
 336
 337 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 338                                            int value)
 339 {
 340         if (dev->battery_min < dev->battery_max &&
 341             value >= dev->battery_min && value <= dev->battery_max)
 342                 value = ((value - dev->battery_min) * 100) /
 343                         (dev->battery_max - dev->battery_min);
 344
 345         return value;
 346 }
 347
 348 static int hidinput_query_battery_capacity(struct hid_device *dev)
 349 {
 350         u8 *buf;
 351         int ret;
 352
 353         buf = kmalloc(4, GFP_KERNEL);
 354         if (!buf)
 355                 return -ENOMEM;
 356
 357         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 358                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 359         if (ret < 2) {
 360                 kfree(buf);
 361                 return -ENODATA;
 362         }
 363
 364         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 365         kfree(buf);
 366         return ret;
 367 }
 368
 369 static int hidinput_get_battery_property(struct power_supply *psy,
 370                                          enum power_supply_property prop,
 371                                          union power_supply_propval *val)
 372 {
 373         struct hid_device *dev = power_supply_get_drvdata(psy);
 374         int value;
 375         int ret = 0;
 376
 377         switch (prop) {
 378         case POWER_SUPPLY_PROP_PRESENT:
 379         case POWER_SUPPLY_PROP_ONLINE:
 380                 val->intval = 1;
 381                 break;
 382
 383         case POWER_SUPPLY_PROP_CAPACITY:
 384                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 385                     !dev->battery_avoid_query) {
 386                         value = hidinput_query_battery_capacity(dev);
 387                         if (value < 0)
 388                                 return value;
 389                 } else  {
 390                         value = dev->battery_capacity;
 391                 }
 392
 393                 val->intval = value;
 394                 break;
 395
 396         case POWER_SUPPLY_PROP_MODEL_NAME:
 397                 val->strval = dev->name;
 398                 break;
 399
 400         case POWER_SUPPLY_PROP_STATUS:
 401                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 402                     !dev->battery_avoid_query) {
 403                         value = hidinput_query_battery_capacity(dev);
 404                         if (value < 0)
 405                                 return value;
 406
 407                         dev->battery_capacity = value;
 408                         dev->battery_status = HID_BATTERY_QUERIED;
 409                 }
 410
 411                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 412                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 413                 else if (dev->battery_capacity == 100)
 414                         val->intval = POWER_SUPPLY_STATUS_FULL;
 415                 else
 416                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 417                 break;
 418
 419         case POWER_SUPPLY_PROP_SCOPE:
 420                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 421                 break;
 422
 423         default:
 424                 ret = -EINVAL;
 425                 break;
 426         }
 427
 428         return ret;
 429 }
 430
 431 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 432 {
 433         struct power_supply_desc *psy_desc;
 434         struct power_supply_config psy_cfg = { .drv_data = dev, };
 435         unsigned quirks;
 436         s32 min, max;
 437         int error;
 438
 439         if (dev->battery)
 440                 return 0;       /* already initialized? */
 441
 442         quirks = find_battery_quirk(dev);
 443
 444         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 445                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 446
 447         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 448                 return 0;
 449
 450         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 451         if (!psy_desc)
 452                 return -ENOMEM;
 453
 454         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 455                                    strlen(dev->uniq) ?
 456                                         dev->uniq : dev_name(&dev->dev));
 457         if (!psy_desc->name) {
 458                 error = -ENOMEM;
 459                 goto err_free_mem;
 460         }
 461
 462         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 463         psy_desc->properties = hidinput_battery_props;
 464         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 465         psy_desc->use_for_apm = 0;
 466         psy_desc->get_property = hidinput_get_battery_property;
 467
 468         min = field->logical_minimum;
 469         max = field->logical_maximum;
 470
 471         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 472                 min = 0;
 473                 max = 100;
 474         }
 475
 476         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 477                 report_type = HID_FEATURE_REPORT;
 478
 479         dev->battery_min = min;
 480         dev->battery_max = max;
 481         dev->battery_report_type = report_type;
 482         dev->battery_report_id = field->report->id;
 483
 484         /*
 485          * Stylus is normally not connected to the device and thus we
 486          * can't query the device and get meaningful battery strength.
 487          * We have to wait for the device to report it on its own.
 488          */
 489         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 490                                    field->physical == HID_DG_STYLUS;
 491
 492         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 493         if (IS_ERR(dev->battery)) {
 494                 error = PTR_ERR(dev->battery);
 495                 hid_warn(dev, "can't register power supply: %d\n", error);
 496                 goto err_free_name;
 497         }
 498
 499         power_supply_powers(dev->battery, &dev->dev);
 500         return 0;
 501
 502 err_free_name:
 503         kfree(psy_desc->name);
 504 err_free_mem:
 505         kfree(psy_desc);
 506         dev->battery = NULL;
 507         return error;
 508 }
 509
 510 static void hidinput_cleanup_battery(struct hid_device *dev)
 511 {
 512         const struct power_supply_desc *psy_desc;
 513
 514         if (!dev->battery)
 515                 return;
 516
 517         psy_desc = dev->battery->desc;
 518         power_supply_unregister(dev->battery);
 519         kfree(psy_desc->name);
 520         kfree(psy_desc);
 521         dev->battery = NULL;
 522 }
 523
 524 static void hidinput_update_battery(struct hid_device *dev, int value)
 525 {
 526         int capacity;
 527
 528         if (!dev->battery)
 529                 return;
 530
 531         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 532                 return;
 533
 534         capacity = hidinput_scale_battery_capacity(dev, value);
 535
 536         if (dev->battery_status != HID_BATTERY_REPORTED ||
 537             capacity != dev->battery_capacity) {
 538                 dev->battery_capacity = capacity;
 539                 dev->battery_status = HID_BATTERY_REPORTED;
 540                 power_supply_changed(dev->battery);
 541         }
 542 }
 543 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 544 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 545                                   struct hid_field *field)
 546 {
 547         return 0;
 548 }
 549
 550 static void hidinput_cleanup_battery(struct hid_device *dev)
 551 {
 552 }
 553
 554 static void hidinput_update_battery(struct hid_device *dev, int value)
 555 {
 556 }
 557 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 558
 559 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 560                                      struct hid_usage *usage)
 561 {
 562         struct input_dev *input = hidinput->input;
 563         struct hid_device *device = input_get_drvdata(input);
 564         int max = 0, code;
 565         unsigned long *bit = NULL;
 566
 567         field->hidinput = hidinput;
 568
 569         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 570                 goto ignore;
 571
 572         /* Ignore if report count is out of bounds. */
 573         if (field->report_count < 1)
 574                 goto ignore;
 575
 576         /* only LED usages are supported in output fields */
 577         if (field->report_type == HID_OUTPUT_REPORT &&
 578                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 579                 goto ignore;
 580         }
 581
 582         if (device->driver->input_mapping) {
 583                 int ret = device->driver->input_mapping(device, hidinput, field,
 584                                 usage, &bit, &max);
 585                 if (ret > 0)
 586                         goto mapped;
 587                 if (ret < 0)
 588                         goto ignore;
 589         }
 590
 591         switch (usage->hid & HID_USAGE_PAGE) {
 592         case HID_UP_UNDEFINED:
 593                 goto ignore;
 594
 595         case HID_UP_KEYBOARD:
 596                 set_bit(EV_REP, input->evbit);
 597
 598                 if ((usage->hid & HID_USAGE) < 256) {
 599                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 600                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 601                 } else
 602                         map_key(KEY_UNKNOWN);
 603
 604                 break;
 605
 606         case HID_UP_BUTTON:
 607                 code = ((usage->hid - 1) & HID_USAGE);
 608
 609                 switch (field->application) {
 610                 case HID_GD_MOUSE:
 611                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 612                 case HID_GD_JOYSTICK:
 613                                 if (code <= 0xf)
 614                                         code += BTN_JOYSTICK;
 615                                 else
 616                                         code += BTN_TRIGGER_HAPPY - 0x10;
 617                                 break;
 618                 case HID_GD_GAMEPAD:
 619                                 if (code <= 0xf)
 620                                         code += BTN_GAMEPAD;
 621                                 else
 622                                         code += BTN_TRIGGER_HAPPY - 0x10;
 623                                 break;
 624                 default:
 625                         switch (field->physical) {
 626                         case HID_GD_MOUSE:
 627                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 628                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 629                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 630                         default:              code += BTN_MISC;
 631                         }
 632                 }
 633
 634                 map_key(code);
 635                 break;
 636
 637         case HID_UP_SIMULATION:
 638                 switch (usage->hid & 0xffff) {
 639                 case 0xba: map_abs(ABS_RUDDER);   break;
 640                 case 0xbb: map_abs(ABS_THROTTLE); break;
 641                 case 0xc4: map_abs(ABS_GAS);      break;
 642                 case 0xc5: map_abs(ABS_BRAKE);    break;
 643                 case 0xc8: map_abs(ABS_WHEEL);    break;
 644                 default:   goto ignore;
 645                 }
 646                 break;
 647
 648         case HID_UP_GENDESK:
 649                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 650                         switch (usage->hid & 0xf) {
 651                         case 0x1: map_key_clear(KEY_POWER);  break;
 652                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 653                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 654                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 655                         case 0x5: map_key_clear(KEY_MENU); break;
 656                         case 0x6: map_key_clear(KEY_PROG1); break;
 657                         case 0x7: map_key_clear(KEY_HELP); break;
 658                         case 0x8: map_key_clear(KEY_EXIT); break;
 659                         case 0x9: map_key_clear(KEY_SELECT); break;
 660                         case 0xa: map_key_clear(KEY_RIGHT); break;
 661                         case 0xb: map_key_clear(KEY_LEFT); break;
 662                         case 0xc: map_key_clear(KEY_UP); break;
 663                         case 0xd: map_key_clear(KEY_DOWN); break;
 664                         case 0xe: map_key_clear(KEY_POWER2); break;
 665                         case 0xf: map_key_clear(KEY_RESTART); break;
 666                         default: goto unknown;
 667                         }
 668                         break;
 669                 }
 670
 671                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 672                         switch (usage->hid & 0xf) {
 673                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 674                         default: goto ignore;
 675                         }
 676                         break;
 677                 }
 678
 679                 /*
 680                  * Some lazy vendors declare 255 usages for System Control,
 681                  * leading to the creation of ABS_X|Y axis and too many others.
 682                  * It wouldn't be a problem if joydev doesn't consider the
 683                  * device as a joystick then.
 684                  */
 685                 if (field->application == HID_GD_SYSTEM_CONTROL)
 686                         goto ignore;
 687
 688                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 689                         switch (usage->hid) {
 690                         case HID_GD_UP:    usage->hat_dir = 1; break;
 691                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 692                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 693                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 694                         default: goto unknown;
 695                         }
 696                         if (field->dpad) {
 697                                 map_abs(field->dpad);
 698                                 goto ignore;
 699                         }
 700                         map_abs(ABS_HAT0X);
 701                         break;
 702                 }
 703
 704                 switch (usage->hid) {
 705                 /* These usage IDs map directly to the usage codes. */
 706                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 707                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 708                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 709                                 map_rel(usage->hid & 0xf);
 710                         else
 711                                 map_abs_clear(usage->hid & 0xf);
 712                         break;
 713
 714                 case HID_GD_WHEEL:
 715                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 716                                 set_bit(REL_WHEEL, input->relbit);
 717                                 map_rel(REL_WHEEL_HI_RES);
 718                         } else {
 719                                 map_abs(usage->hid & 0xf);
 720                         }
 721                         break;
 722                 case HID_GD_SLIDER: case HID_GD_DIAL:
 723                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 724                                 map_rel(usage->hid & 0xf);
 725                         else
 726                                 map_abs(usage->hid & 0xf);
 727                         break;
 728
 729                 case HID_GD_HATSWITCH:
 730                         usage->hat_min = field->logical_minimum;
 731                         usage->hat_max = field->logical_maximum;
 732                         map_abs(ABS_HAT0X);
 733                         break;
 734
 735                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 736                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 737
 738                 case HID_GD_RFKILL_BTN:
 739                         /* MS wireless radio ctl extension, also check CA */
 740                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 741                                 map_key_clear(KEY_RFKILL);
 742                                 /* We need to simulate the btn release */
 743                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 744                                 break;
 745                         }
 746
 747                 default: goto unknown;
 748                 }
 749
 750                 break;
 751
 752         case HID_UP_LED:
 753                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 754                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 755                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 756                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 757                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 758                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 759                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 760                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 761                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 762                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 763                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 764                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 765
 766                 default: goto ignore;
 767                 }
 768                 break;
 769
 770         case HID_UP_DIGITIZER:
 771                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 772                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 773                 else if ((field->application & 0xff) == 0x02) /* Pen */
 774                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 775
 776                 switch (usage->hid & 0xff) {
 777                 case 0x00: /* Undefined */
 778                         goto ignore;
 779
 780                 case 0x30: /* TipPressure */
 781                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 782                                 device->quirks |= HID_QUIRK_NOTOUCH;
 783                                 set_bit(EV_KEY, input->evbit);
 784                                 set_bit(BTN_TOUCH, input->keybit);
 785                         }
 786                         map_abs_clear(ABS_PRESSURE);
 787                         break;
 788
 789                 case 0x32: /* InRange */
 790                         switch (field->physical & 0xff) {
 791                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 792                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 793                         default: map_key(BTN_TOOL_PEN); break;
 794                         }
 795                         break;
 796
 797                 case 0x3b: /* Battery Strength */
 798                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 799                         usage->type = EV_PWR;
 800                         goto ignore;
 801
 802                 case 0x3c: /* Invert */
 803                         map_key_clear(BTN_TOOL_RUBBER);
 804                         break;
 805
 806                 case 0x3d: /* X Tilt */
 807                         map_abs_clear(ABS_TILT_X);
 808                         break;
 809
 810                 case 0x3e: /* Y Tilt */
 811                         map_abs_clear(ABS_TILT_Y);
 812                         break;
 813
 814                 case 0x33: /* Touch */
 815                 case 0x42: /* TipSwitch */
 816                 case 0x43: /* TipSwitch2 */
 817                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 818                         map_key_clear(BTN_TOUCH);
 819                         break;
 820
 821                 case 0x44: /* BarrelSwitch */
 822                         map_key_clear(BTN_STYLUS);
 823                         break;
 824
 825                 case 0x45: /* ERASER */
 826                         /*
 827                          * This event is reported when eraser tip touches the surface.
 828                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 829                          * tool gets in proximity.
 830                          */
 831                         map_key_clear(BTN_TOUCH);
 832                         break;
 833
 834                 case 0x46: /* TabletPick */
 835                 case 0x5a: /* SecondaryBarrelSwitch */
 836                         map_key_clear(BTN_STYLUS2);
 837                         break;
 838
 839                 case 0x5b: /* TransducerSerialNumber */
 840                         usage->type = EV_MSC;
 841                         usage->code = MSC_SERIAL;
 842                         bit = input->mscbit;
 843                         max = MSC_MAX;
 844                         break;
 845
 846                 default:  goto unknown;
 847                 }
 848                 break;
 849
 850         case HID_UP_TELEPHONY:
 851                 switch (usage->hid & HID_USAGE) {
 852                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 853                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 854                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 855                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 856                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 857                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 858                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 859                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 860                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 861                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 862                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 863                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 864                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 865                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 866                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 867                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 868                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 869                 default: goto ignore;
 870                 }
 871                 break;
 872
 873         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 874                 switch (usage->hid & HID_USAGE) {
 875                 case 0x000: goto ignore;
 876                 case 0x030: map_key_clear(KEY_POWER);           break;
 877                 case 0x031: map_key_clear(KEY_RESTART);         break;
 878                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 879                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 880                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 881                 case 0x036: map_key_clear(BTN_MISC);            break;
 882
 883                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 884                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 885                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 886                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 887                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 888                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 889                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 890                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 891                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 892
 893                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 894                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 895                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 896                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 897                 case 0x069: map_key_clear(KEY_RED);             break;
 898                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 899                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 900                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 901                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 902
 903                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 904                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 905                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 906                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 907                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 908                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 909
 910                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 911                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 912                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 913
 914                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 915                 case 0x083: map_key_clear(KEY_LAST);            break;
 916                 case 0x084: map_key_clear(KEY_ENTER);           break;
 917                 case 0x088: map_key_clear(KEY_PC);              break;
 918                 case 0x089: map_key_clear(KEY_TV);              break;
 919                 case 0x08a: map_key_clear(KEY_WWW);             break;
 920                 case 0x08b: map_key_clear(KEY_DVD);             break;
 921                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 922                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 923                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 924                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 925                 case 0x090: map_key_clear(KEY_MEMO);            break;
 926                 case 0x091: map_key_clear(KEY_CD);              break;
 927                 case 0x092: map_key_clear(KEY_VCR);             break;
 928                 case 0x093: map_key_clear(KEY_TUNER);           break;
 929                 case 0x094: map_key_clear(KEY_EXIT);            break;
 930                 case 0x095: map_key_clear(KEY_HELP);            break;
 931                 case 0x096: map_key_clear(KEY_TAPE);            break;
 932                 case 0x097: map_key_clear(KEY_TV2);             break;
 933                 case 0x098: map_key_clear(KEY_SAT);             break;
 934                 case 0x09a: map_key_clear(KEY_PVR);             break;
 935
 936                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 937                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 938                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 939
 940                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 941                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 942                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 943                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 944                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 945                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 946                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 947                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 948                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 949                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 950                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 951                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 952
 953                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 954                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 955                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 956                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 957                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 958                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 959                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 960                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 961
 962                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 963                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 964                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 965                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 966                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 967                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 968                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 969                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 970                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 971                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 972                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 973                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 974                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 975                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 976                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 977                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 978                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 979                 case 0x192: map_key_clear(KEY_CALC);            break;
 980                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 981                 case 0x194: map_key_clear(KEY_FILE);            break;
 982                 case 0x196: map_key_clear(KEY_WWW);             break;
 983                 case 0x199: map_key_clear(KEY_CHAT);            break;
 984                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 985                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 986                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 987                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 988                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 989                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 990                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 991                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 992                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 993                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 994                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 995                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 996                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 997                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 998                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 999                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1000                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1001                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1002                 case 0x201: map_key_clear(KEY_NEW);             break;
1003                 case 0x202: map_key_clear(KEY_OPEN);            break;
1004                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1005                 case 0x204: map_key_clear(KEY_EXIT);            break;
1006                 case 0x207: map_key_clear(KEY_SAVE);            break;
1007                 case 0x208: map_key_clear(KEY_PRINT);           break;
1008                 case 0x209: map_key_clear(KEY_PROPS);           break;
1009                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1010                 case 0x21b: map_key_clear(KEY_COPY);            break;
1011                 case 0x21c: map_key_clear(KEY_CUT);             break;
1012                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1013                 case 0x21f: map_key_clear(KEY_FIND);            break;
1014                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1015                 case 0x222: map_key_clear(KEY_GOTO);            break;
1016                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1017                 case 0x224: map_key_clear(KEY_BACK);            break;
1018                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1019                 case 0x226: map_key_clear(KEY_STOP);            break;
1020                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1021                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1022                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1023                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1024                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1025                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1026                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1027                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1028                 case 0x238: /* AC Pan */
1029                         set_bit(REL_HWHEEL, input->relbit);
1030                         map_rel(REL_HWHEEL_HI_RES);
1031                         break;
1032                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1033                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1034                 case 0x269: map_key_clear(KEY_INSERT);          break;
1035                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1036                 case 0x279: map_key_clear(KEY_REDO);            break;
1037
1038                 case 0x289: map_key_clear(KEY_REPLY);           break;
1039                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1040                 case 0x28c: map_key_clear(KEY_SEND);            break;
1041
1042                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1043
1044                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1045                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1046                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1047                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1048                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1049                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1050
1051                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1052
1053                 default: map_key_clear(KEY_UNKNOWN);
1054                 }
1055                 break;
1056
1057         case HID_UP_GENDEVCTRLS:
1058                 switch (usage->hid) {
1059                 case HID_DC_BATTERYSTRENGTH:
1060                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1061                         usage->type = EV_PWR;
1062                         goto ignore;
1063                 }
1064                 goto unknown;
1065
1066         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1067                 set_bit(EV_REP, input->evbit);
1068                 switch (usage->hid & HID_USAGE) {
1069                 case 0x021: map_key_clear(KEY_PRINT);           break;
1070                 case 0x070: map_key_clear(KEY_HP);              break;
1071                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1072                 case 0x072: map_key_clear(KEY_SOUND);           break;
1073                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1074                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1075                 case 0x081: map_key_clear(KEY_CHAT);            break;
1076                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1077                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1078                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1079                 case 0x085: map_key_clear(KEY_SPORT);           break;
1080                 case 0x086: map_key_clear(KEY_SHOP);            break;
1081                 default:    goto ignore;
1082                 }
1083                 break;
1084
1085         case HID_UP_HPVENDOR2:
1086                 set_bit(EV_REP, input->evbit);
1087                 switch (usage->hid & HID_USAGE) {
1088                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1089                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1090                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1091                 default:    goto ignore;
1092                 }
1093                 break;
1094
1095         case HID_UP_MSVENDOR:
1096                 goto ignore;
1097
1098         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1099                 set_bit(EV_REP, input->evbit);
1100                 goto ignore;
1101
1102         case HID_UP_LOGIVENDOR:
1103                 /* intentional fallback */
1104         case HID_UP_LOGIVENDOR2:
1105                 /* intentional fallback */
1106         case HID_UP_LOGIVENDOR3:
1107                 goto ignore;
1108
1109         case HID_UP_PID:
1110                 switch (usage->hid & HID_USAGE) {
1111                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1112                 default: goto ignore;
1113                 }
1114                 break;
1115
1116         default:
1117         unknown:
1118                 if (field->report_size == 1) {
1119                         if (field->report->type == HID_OUTPUT_REPORT) {
1120                                 map_led(LED_MISC);
1121                                 break;
1122                         }
1123                         map_key(BTN_MISC);
1124                         break;
1125                 }
1126                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1127                         map_rel(REL_MISC);
1128                         break;
1129                 }
1130                 map_abs(ABS_MISC);
1131                 break;
1132         }
1133
1134 mapped:
1135         /* Mapping failed, bail out */
1136         if (!bit)
1137                 return;
1138
1139         if (device->driver->input_mapped &&
1140             device->driver->input_mapped(device, hidinput, field, usage,
1141                                          &bit, &max) < 0) {
1142                 /*
1143                  * The driver indicated that no further generic handling
1144                  * of the usage is desired.
1145                  */
1146                 return;
1147         }
1148
1149         set_bit(usage->type, input->evbit);
1150
1151         /*
1152          * This part is *really* controversial:
1153          * - HID aims at being generic so we should do our best to export
1154          *   all incoming events
1155          * - HID describes what events are, so there is no reason for ABS_X
1156          *   to be mapped to ABS_Y
1157          * - HID is using *_MISC+N as a default value, but nothing prevents
1158          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1159          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1160          *   processing)
1161          *
1162          * If devices still want to use this (at their own risk), they will
1163          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1164          * the default should be a reliable mapping.
1165          */
1166         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1167                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1168                         usage->code = find_next_zero_bit(bit,
1169                                                          max + 1,
1170                                                          usage->code);
1171                 } else {
1172                         device->status |= HID_STAT_DUP_DETECTED;
1173                         goto ignore;
1174                 }
1175         }
1176
1177         if (usage->code > max)
1178                 goto ignore;
1179
1180         if (usage->type == EV_ABS) {
1181
1182                 int a = field->logical_minimum;
1183                 int b = field->logical_maximum;
1184
1185                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1186                         a = field->logical_minimum = 0;
1187                         b = field->logical_maximum = 255;
1188                 }
1189
1190                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1191                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1192                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1193
1194                 input_abs_set_res(input, usage->code,
1195                                   hidinput_calc_abs_res(field, usage->code));
1196
1197                 /* use a larger default input buffer for MT devices */
1198                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1199                         input_set_events_per_packet(input, 60);
1200         }
1201
1202         if (usage->type == EV_ABS &&
1203             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1204                 int i;
1205                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1206                         input_set_abs_params(input, i, -1, 1, 0, 0);
1207                         set_bit(i, input->absbit);
1208                 }
1209                 if (usage->hat_dir && !field->dpad)
1210                         field->dpad = usage->code;
1211         }
1212
1213         /* for those devices which produce Consumer volume usage as relative,
1214          * we emulate pressing volumeup/volumedown appropriate number of times
1215          * in hidinput_hid_event()
1216          */
1217         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1218                         (usage->code == ABS_VOLUME)) {
1219                 set_bit(KEY_VOLUMEUP, input->keybit);
1220                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1221         }
1222
1223         if (usage->type == EV_KEY) {
1224                 set_bit(EV_MSC, input->evbit);
1225                 set_bit(MSC_SCAN, input->mscbit);
1226         }
1227
1228         return;
1229
1230 ignore:
1231         usage->type = 0;
1232         usage->code = 0;
1233 }
1234
1235 static void hidinput_handle_scroll(struct hid_usage *usage,
1236                                    struct input_dev *input,
1237                                    __s32 value)
1238 {
1239         int code;
1240         int hi_res, lo_res;
1241
1242         if (value == 0)
1243                 return;
1244
1245         if (usage->code == REL_WHEEL_HI_RES)
1246                 code = REL_WHEEL;
1247         else
1248                 code = REL_HWHEEL;
1249
1250         /*
1251          * Windows reports one wheel click as value 120. Where a high-res
1252          * scroll wheel is present, a fraction of 120 is reported instead.
1253          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1254          * adhere to the 120 expectation.
1255          */
1256         hi_res = value * 120/usage->resolution_multiplier;
1257
1258         usage->wheel_accumulated += hi_res;
1259         lo_res = usage->wheel_accumulated/120;
1260         if (lo_res)
1261                 usage->wheel_accumulated -= lo_res * 120;
1262
1263         input_event(input, EV_REL, code, lo_res);
1264         input_event(input, EV_REL, usage->code, hi_res);
1265 }
1266
1267 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1268 {
1269         struct input_dev *input;
1270         unsigned *quirks = &hid->quirks;
1271
1272         if (!usage->type)
1273                 return;
1274
1275         if (usage->type == EV_PWR) {
1276                 hidinput_update_battery(hid, value);
1277                 return;
1278         }
1279
1280         if (!field->hidinput)
1281                 return;
1282
1283         input = field->hidinput->input;
1284
1285         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1286                 int hat_dir = usage->hat_dir;
1287                 if (!hat_dir)
1288                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1289                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1290                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1291                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1292                 return;
1293         }
1294
1295         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1296                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1297                 return;
1298         }
1299
1300         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1301                 if (value) {
1302                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1303                         return;
1304                 }
1305                 input_event(input, usage->type, usage->code, 0);
1306                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1307                 return;
1308         }
1309
1310         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1311                 int a = field->logical_minimum;
1312                 int b = field->logical_maximum;
1313                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1314         }
1315
1316         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1317                 dbg_hid("Maximum Effects - %d\n",value);
1318                 return;
1319         }
1320
1321         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1322                 dbg_hid("PID Pool Report\n");
1323                 return;
1324         }
1325
1326         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1327                 return;
1328
1329         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1330                                         usage->code == REL_HWHEEL_HI_RES)) {
1331                 hidinput_handle_scroll(usage, input, value);
1332                 return;
1333         }
1334
1335         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1336                         (usage->code == ABS_VOLUME)) {
1337                 int count = abs(value);
1338                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1339                 int i;
1340
1341                 for (i = 0; i < count; i++) {
1342                         input_event(input, EV_KEY, direction, 1);
1343                         input_sync(input);
1344                         input_event(input, EV_KEY, direction, 0);
1345                         input_sync(input);
1346                 }
1347                 return;
1348         }
1349
1350         /*
1351          * Ignore out-of-range values as per HID specification,
1352          * section 5.10 and 6.2.25, when NULL state bit is present.
1353          * When it's not, clamp the value to match Microsoft's input
1354          * driver as mentioned in "Required HID usages for digitizers":
1355          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1356          *
1357          * The logical_minimum < logical_maximum check is done so that we
1358          * don't unintentionally discard values sent by devices which
1359          * don't specify logical min and max.
1360          */
1361         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1362             (field->logical_minimum < field->logical_maximum)) {
1363                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1364                     (value < field->logical_minimum ||
1365                      value > field->logical_maximum)) {
1366                         dbg_hid("Ignoring out-of-range value %x\n", value);
1367                         return;
1368                 }
1369                 value = clamp(value,
1370                               field->logical_minimum,
1371                               field->logical_maximum);
1372         }
1373
1374         /*
1375          * Ignore reports for absolute data if the data didn't change. This is
1376          * not only an optimization but also fixes 'dead' key reports. Some
1377          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1378          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1379          * can only have one of them physically available. The 'dead' keys
1380          * report constant 0. As all map to the same keycode, they'd confuse
1381          * the input layer. If we filter the 'dead' keys on the HID level, we
1382          * skip the keycode translation and only forward real events.
1383          */
1384         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1385                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1386                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1387             usage->usage_index < field->maxusage &&
1388             value == field->value[usage->usage_index])
1389                 return;
1390
1391         /* report the usage code as scancode if the key status has changed */
1392         if (usage->type == EV_KEY &&
1393             (!test_bit(usage->code, input->key)) == value)
1394                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1395
1396         input_event(input, usage->type, usage->code, value);
1397
1398         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1399             usage->type == EV_KEY && value) {
1400                 input_sync(input);
1401                 input_event(input, usage->type, usage->code, 0);
1402         }
1403 }
1404
1405 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1406 {
1407         struct hid_input *hidinput;
1408
1409         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1410                 return;
1411
1412         list_for_each_entry(hidinput, &hid->inputs, list)
1413                 input_sync(hidinput->input);
1414 }
1415 EXPORT_SYMBOL_GPL(hidinput_report_event);
1416
1417 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1418 {
1419         struct hid_report *report;
1420         int i, j;
1421
1422         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1423                 for (i = 0; i < report->maxfield; i++) {
1424                         *field = report->field[i];
1425                         for (j = 0; j < (*field)->maxusage; j++)
1426                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1427                                         return j;
1428                 }
1429         }
1430         return -1;
1431 }
1432 EXPORT_SYMBOL_GPL(hidinput_find_field);
1433
1434 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1435 {
1436         struct hid_report *report;
1437         struct hid_field *field;
1438         int i, j;
1439
1440         list_for_each_entry(report,
1441                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1442                             list) {
1443                 for (i = 0; i < report->maxfield; i++) {
1444                         field = report->field[i];
1445                         for (j = 0; j < field->maxusage; j++)
1446                                 if (field->usage[j].type == EV_LED)
1447                                         return field;
1448                 }
1449         }
1450         return NULL;
1451 }
1452 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1453
1454 unsigned int hidinput_count_leds(struct hid_device *hid)
1455 {
1456         struct hid_report *report;
1457         struct hid_field *field;
1458         int i, j;
1459         unsigned int count = 0;
1460
1461         list_for_each_entry(report,
1462                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1463                             list) {
1464                 for (i = 0; i < report->maxfield; i++) {
1465                         field = report->field[i];
1466                         for (j = 0; j < field->maxusage; j++)
1467                                 if (field->usage[j].type == EV_LED &&
1468                                     field->value[j])
1469                                         count += 1;
1470                 }
1471         }
1472         return count;
1473 }
1474 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1475
1476 static void hidinput_led_worker(struct work_struct *work)
1477 {
1478         struct hid_device *hid = container_of(work, struct hid_device,
1479                                               led_work);
1480         struct hid_field *field;
1481         struct hid_report *report;
1482         int ret;
1483         u32 len;
1484         __u8 *buf;
1485
1486         field = hidinput_get_led_field(hid);
1487         if (!field)
1488                 return;
1489
1490         /*
1491          * field->report is accessed unlocked regarding HID core. So there might
1492          * be another incoming SET-LED request from user-space, which changes
1493          * the LED state while we assemble our outgoing buffer. However, this
1494          * doesn't matter as hid_output_report() correctly converts it into a
1495          * boolean value no matter what information is currently set on the LED
1496          * field (even garbage). So the remote device will always get a valid
1497          * request.
1498          * And in case we send a wrong value, a next led worker is spawned
1499          * for every SET-LED request so the following worker will send the
1500          * correct value, guaranteed!
1501          */
1502
1503         report = field->report;
1504
1505         /* use custom SET_REPORT request if possible (asynchronous) */
1506         if (hid->ll_driver->request)
1507                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1508
1509         /* fall back to generic raw-output-report */
1510         len = hid_report_len(report);
1511         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1512         if (!buf)
1513                 return;
1514
1515         hid_output_report(report, buf);
1516         /* synchronous output report */
1517         ret = hid_hw_output_report(hid, buf, len);
1518         if (ret == -ENOSYS)
1519                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1520                                 HID_REQ_SET_REPORT);
1521         kfree(buf);
1522 }
1523
1524 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1525                                 unsigned int code, int value)
1526 {
1527         struct hid_device *hid = input_get_drvdata(dev);
1528         struct hid_field *field;
1529         int offset;
1530
1531         if (type == EV_FF)
1532                 return input_ff_event(dev, type, code, value);
1533
1534         if (type != EV_LED)
1535                 return -1;
1536
1537         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1538                 hid_warn(dev, "event field not found\n");
1539                 return -1;
1540         }
1541
1542         hid_set_field(field, offset, value);
1543
1544         schedule_work(&hid->led_work);
1545         return 0;
1546 }
1547
1548 static int hidinput_open(struct input_dev *dev)
1549 {
1550         struct hid_device *hid = input_get_drvdata(dev);
1551
1552         return hid_hw_open(hid);
1553 }
1554
1555 static void hidinput_close(struct input_dev *dev)
1556 {
1557         struct hid_device *hid = input_get_drvdata(dev);
1558
1559         hid_hw_close(hid);
1560 }
1561
1562 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1563                 struct hid_report *report, bool use_logical_max)
1564 {
1565         struct hid_usage *usage;
1566         bool update_needed = false;
1567         bool get_report_completed = false;
1568         int i, j;
1569
1570         if (report->maxfield == 0)
1571                 return false;
1572
1573         for (i = 0; i < report->maxfield; i++) {
1574                 __s32 value = use_logical_max ?
1575                               report->field[i]->logical_maximum :
1576                               report->field[i]->logical_minimum;
1577
1578                 /* There is no good reason for a Resolution
1579                  * Multiplier to have a count other than 1.
1580                  * Ignore that case.
1581                  */
1582                 if (report->field[i]->report_count != 1)
1583                         continue;
1584
1585                 for (j = 0; j < report->field[i]->maxusage; j++) {
1586                         usage = &report->field[i]->usage[j];
1587
1588                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1589                                 continue;
1590
1591                         /*
1592                          * If we have more than one feature within this
1593                          * report we need to fill in the bits from the
1594                          * others before we can overwrite the ones for the
1595                          * Resolution Multiplier.
1596                          *
1597                          * But if we're not allowed to read from the device,
1598                          * we just bail. Such a device should not exist
1599                          * anyway.
1600                          */
1601                         if (!get_report_completed && report->maxfield > 1) {
1602                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1603                                         return update_needed;
1604
1605                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1606                                 hid_hw_wait(hid);
1607                                 get_report_completed = true;
1608                         }
1609
1610                         report->field[i]->value[j] = value;
1611                         update_needed = true;
1612                 }
1613         }
1614
1615         return update_needed;
1616 }
1617
1618 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1619 {
1620         struct hid_report_enum *rep_enum;
1621         struct hid_report *rep;
1622         int ret;
1623
1624         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1625         list_for_each_entry(rep, &rep_enum->report_list, list) {
1626                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1627                                                                      rep, true);
1628
1629                 if (update_needed) {
1630                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1631                         if (ret) {
1632                                 __hidinput_change_resolution_multipliers(hid,
1633                                                                     rep, false);
1634                                 return;
1635                         }
1636                 }
1637         }
1638
1639         /* refresh our structs */
1640         hid_setup_resolution_multiplier(hid);
1641 }
1642
1643 static void report_features(struct hid_device *hid)
1644 {
1645         struct hid_driver *drv = hid->driver;
1646         struct hid_report_enum *rep_enum;
1647         struct hid_report *rep;
1648         struct hid_usage *usage;
1649         int i, j;
1650
1651         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1652         list_for_each_entry(rep, &rep_enum->report_list, list)
1653                 for (i = 0; i < rep->maxfield; i++) {
1654                         /* Ignore if report count is out of bounds. */
1655                         if (rep->field[i]->report_count < 1)
1656                                 continue;
1657
1658                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1659                                 usage = &rep->field[i]->usage[j];
1660
1661                                 /* Verify if Battery Strength feature is available */
1662                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1663                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1664                                                                rep->field[i]);
1665
1666                                 if (drv->feature_mapping)
1667                                         drv->feature_mapping(hid, rep->field[i], usage);
1668                         }
1669                 }
1670 }
1671
1672 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1673                                            unsigned int application)
1674 {
1675         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1676         struct input_dev *input_dev = input_allocate_device();
1677         const char *suffix = NULL;
1678         size_t suffix_len, name_len;
1679
1680         if (!hidinput || !input_dev)
1681                 goto fail;
1682
1683         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1684             hid->maxapplication > 1) {
1685                 switch (application) {
1686                 case HID_GD_KEYBOARD:
1687                         suffix = "Keyboard";
1688                         break;
1689                 case HID_GD_KEYPAD:
1690                         suffix = "Keypad";
1691                         break;
1692                 case HID_GD_MOUSE:
1693                         suffix = "Mouse";
1694                         break;
1695                 case HID_DG_STYLUS:
1696                         suffix = "Pen";
1697                         break;
1698                 case HID_DG_TOUCHSCREEN:
1699                         suffix = "Touchscreen";
1700                         break;
1701                 case HID_DG_TOUCHPAD:
1702                         suffix = "Touchpad";
1703                         break;
1704                 case HID_GD_SYSTEM_CONTROL:
1705                         suffix = "System Control";
1706                         break;
1707                 case HID_CP_CONSUMER_CONTROL:
1708                         suffix = "Consumer Control";
1709                         break;
1710                 case HID_GD_WIRELESS_RADIO_CTLS:
1711                         suffix = "Wireless Radio Control";
1712                         break;
1713                 case HID_GD_SYSTEM_MULTIAXIS:
1714                         suffix = "System Multi Axis";
1715                         break;
1716                 default:
1717                         break;
1718                 }
1719         }
1720
1721         if (suffix) {
1722                 name_len = strlen(hid->name);
1723                 suffix_len = strlen(suffix);
1724                 if ((name_len < suffix_len) ||
1725                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1726                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1727                                                    hid->name, suffix);
1728                         if (!hidinput->name)
1729                                 goto fail;
1730                 }
1731         }
1732
1733         input_set_drvdata(input_dev, hid);
1734         input_dev->event = hidinput_input_event;
1735         input_dev->open = hidinput_open;
1736         input_dev->close = hidinput_close;
1737         input_dev->setkeycode = hidinput_setkeycode;
1738         input_dev->getkeycode = hidinput_getkeycode;
1739
1740         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1741         input_dev->phys = hid->phys;
1742         input_dev->uniq = hid->uniq;
1743         input_dev->id.bustype = hid->bus;
1744         input_dev->id.vendor  = hid->vendor;
1745         input_dev->id.product = hid->product;
1746         input_dev->id.version = hid->version;
1747         input_dev->dev.parent = &hid->dev;
1748
1749         hidinput->input = input_dev;
1750         hidinput->application = application;
1751         list_add_tail(&hidinput->list, &hid->inputs);
1752
1753         INIT_LIST_HEAD(&hidinput->reports);
1754
1755         return hidinput;
1756
1757 fail:
1758         kfree(hidinput);
1759         input_free_device(input_dev);
1760         hid_err(hid, "Out of memory during hid input probe\n");
1761         return NULL;
1762 }
1763
1764 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1765 {
1766         int i;
1767         unsigned long r = 0;
1768
1769         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1770                 r |= hidinput->input->evbit[i];
1771
1772         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1773                 r |= hidinput->input->keybit[i];
1774
1775         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1776                 r |= hidinput->input->relbit[i];
1777
1778         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1779                 r |= hidinput->input->absbit[i];
1780
1781         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1782                 r |= hidinput->input->mscbit[i];
1783
1784         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1785                 r |= hidinput->input->ledbit[i];
1786
1787         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1788                 r |= hidinput->input->sndbit[i];
1789
1790         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1791                 r |= hidinput->input->ffbit[i];
1792
1793         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1794                 r |= hidinput->input->swbit[i];
1795
1796         return !!r;
1797 }
1798
1799 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1800                 struct hid_input *hidinput)
1801 {
1802         struct hid_report *report;
1803         int i, k;
1804
1805         list_del(&hidinput->list);
1806         input_free_device(hidinput->input);
1807         kfree(hidinput->name);
1808
1809         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1810                 if (k == HID_OUTPUT_REPORT &&
1811                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1812                         continue;
1813
1814                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1815                                     list) {
1816
1817                         for (i = 0; i < report->maxfield; i++)
1818                                 if (report->field[i]->hidinput == hidinput)
1819                                         report->field[i]->hidinput = NULL;
1820                 }
1821         }
1822
1823         kfree(hidinput);
1824 }
1825
1826 static struct hid_input *hidinput_match(struct hid_report *report)
1827 {
1828         struct hid_device *hid = report->device;
1829         struct hid_input *hidinput;
1830
1831         list_for_each_entry(hidinput, &hid->inputs, list) {
1832                 if (hidinput->report &&
1833                     hidinput->report->id == report->id)
1834                         return hidinput;
1835         }
1836
1837         return NULL;
1838 }
1839
1840 static struct hid_input *hidinput_match_application(struct hid_report *report)
1841 {
1842         struct hid_device *hid = report->device;
1843         struct hid_input *hidinput;
1844
1845         list_for_each_entry(hidinput, &hid->inputs, list) {
1846                 if (hidinput->application == report->application)
1847                         return hidinput;
1848         }
1849
1850         return NULL;
1851 }
1852
1853 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1854                                              struct hid_report *report)
1855 {
1856         int i, j;
1857
1858         for (i = 0; i < report->maxfield; i++)
1859                 for (j = 0; j < report->field[i]->maxusage; j++)
1860                         hidinput_configure_usage(hidinput, report->field[i],
1861                                                  report->field[i]->usage + j);
1862 }
1863
1864 /*
1865  * Register the input device; print a message.
1866  * Configure the input layer interface
1867  * Read all reports and initialize the absolute field values.
1868  */
1869
1870 int hidinput_connect(struct hid_device *hid, unsigned int force)
1871 {
1872         struct hid_driver *drv = hid->driver;
1873         struct hid_report *report;
1874         struct hid_input *next, *hidinput = NULL;
1875         unsigned int application;
1876         int i, k;
1877
1878         INIT_LIST_HEAD(&hid->inputs);
1879         INIT_WORK(&hid->led_work, hidinput_led_worker);
1880
1881         hid->status &= ~HID_STAT_DUP_DETECTED;
1882
1883         if (!force) {
1884                 for (i = 0; i < hid->maxcollection; i++) {
1885                         struct hid_collection *col = &hid->collection[i];
1886                         if (col->type == HID_COLLECTION_APPLICATION ||
1887                                         col->type == HID_COLLECTION_PHYSICAL)
1888                                 if (IS_INPUT_APPLICATION(col->usage))
1889                                         break;
1890                 }
1891
1892                 if (i == hid->maxcollection)
1893                         return -1;
1894         }
1895
1896         report_features(hid);
1897
1898         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1899                 if (k == HID_OUTPUT_REPORT &&
1900                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1901                         continue;
1902
1903                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1904
1905                         if (!report->maxfield)
1906                                 continue;
1907
1908                         application = report->application;
1909
1910                         /*
1911                          * Find the previous hidinput report attached
1912                          * to this report id.
1913                          */
1914                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1915                                 hidinput = hidinput_match(report);
1916                         else if (hid->maxapplication > 1 &&
1917                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1918                                 hidinput = hidinput_match_application(report);
1919
1920                         if (!hidinput) {
1921                                 hidinput = hidinput_allocate(hid, application);
1922                                 if (!hidinput)
1923                                         goto out_unwind;
1924                         }
1925
1926                         hidinput_configure_usages(hidinput, report);
1927
1928                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1929                                 hidinput->report = report;
1930
1931                         list_add_tail(&report->hidinput_list,
1932                                       &hidinput->reports);
1933                 }
1934         }
1935
1936         hidinput_change_resolution_multipliers(hid);
1937
1938         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1939                 if (drv->input_configured &&
1940                     drv->input_configured(hid, hidinput))
1941                         goto out_unwind;
1942
1943                 if (!hidinput_has_been_populated(hidinput)) {
1944                         /* no need to register an input device not populated */
1945                         hidinput_cleanup_hidinput(hid, hidinput);
1946                         continue;
1947                 }
1948
1949                 if (input_register_device(hidinput->input))
1950                         goto out_unwind;
1951                 hidinput->registered = true;
1952         }
1953
1954         if (list_empty(&hid->inputs)) {
1955                 hid_err(hid, "No inputs registered, leaving\n");
1956                 goto out_unwind;
1957         }
1958
1959         if (hid->status & HID_STAT_DUP_DETECTED)
1960                 hid_dbg(hid,
1961                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1962
1963         return 0;
1964
1965 out_unwind:
1966         /* unwind the ones we already registered */
1967         hidinput_disconnect(hid);
1968
1969         return -1;
1970 }
1971 EXPORT_SYMBOL_GPL(hidinput_connect);
1972
1973 void hidinput_disconnect(struct hid_device *hid)
1974 {
1975         struct hid_input *hidinput, *next;
1976
1977         hidinput_cleanup_battery(hid);
1978
1979         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1980                 list_del(&hidinput->list);
1981                 if (hidinput->registered)
1982                         input_unregister_device(hidinput->input);
1983                 else
1984                         input_free_device(hidinput->input);
1985                 kfree(hidinput->name);
1986                 kfree(hidinput);
1987         }
1988
1989         /* led_work is spawned by input_dev callbacks, but doesn't access the
1990          * parent input_dev at all. Once all input devices are removed, we
1991          * know that led_work will never get restarted, so we can cancel it
1992          * synchronously and are safe. */
1993         cancel_work_sync(&hid->led_work);
1994 }
1995 EXPORT_SYMBOL_GPL(hidinput_disconnect);