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(2, GFP_KERNEL);
 354         if (!buf)
 355                 return -ENOMEM;
 356
 357         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 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         if (device->driver->input_mapped && device->driver->input_mapped(device,
1136                                 hidinput, field, usage, &bit, &max) < 0)
1137                 goto ignore;
1138
1139         set_bit(usage->type, input->evbit);
1140
1141         /*
1142          * This part is *really* controversial:
1143          * - HID aims at being generic so we should do our best to export
1144          *   all incoming events
1145          * - HID describes what events are, so there is no reason for ABS_X
1146          *   to be mapped to ABS_Y
1147          * - HID is using *_MISC+N as a default value, but nothing prevents
1148          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1149          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1150          *   processing)
1151          *
1152          * If devices still want to use this (at their own risk), they will
1153          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1154          * the default should be a reliable mapping.
1155          */
1156         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1157                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1158                         usage->code = find_next_zero_bit(bit,
1159                                                          max + 1,
1160                                                          usage->code);
1161                 } else {
1162                         device->status |= HID_STAT_DUP_DETECTED;
1163                         goto ignore;
1164                 }
1165         }
1166
1167         if (usage->code > max)
1168                 goto ignore;
1169
1170         if (usage->type == EV_ABS) {
1171
1172                 int a = field->logical_minimum;
1173                 int b = field->logical_maximum;
1174
1175                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1176                         a = field->logical_minimum = 0;
1177                         b = field->logical_maximum = 255;
1178                 }
1179
1180                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1181                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1182                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1183
1184                 input_abs_set_res(input, usage->code,
1185                                   hidinput_calc_abs_res(field, usage->code));
1186
1187                 /* use a larger default input buffer for MT devices */
1188                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1189                         input_set_events_per_packet(input, 60);
1190         }
1191
1192         if (usage->type == EV_ABS &&
1193             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1194                 int i;
1195                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1196                         input_set_abs_params(input, i, -1, 1, 0, 0);
1197                         set_bit(i, input->absbit);
1198                 }
1199                 if (usage->hat_dir && !field->dpad)
1200                         field->dpad = usage->code;
1201         }
1202
1203         /* for those devices which produce Consumer volume usage as relative,
1204          * we emulate pressing volumeup/volumedown appropriate number of times
1205          * in hidinput_hid_event()
1206          */
1207         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1208                         (usage->code == ABS_VOLUME)) {
1209                 set_bit(KEY_VOLUMEUP, input->keybit);
1210                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1211         }
1212
1213         if (usage->type == EV_KEY) {
1214                 set_bit(EV_MSC, input->evbit);
1215                 set_bit(MSC_SCAN, input->mscbit);
1216         }
1217
1218 ignore:
1219         return;
1220
1221 }
1222
1223 static void hidinput_handle_scroll(struct hid_usage *usage,
1224                                    struct input_dev *input,
1225                                    __s32 value)
1226 {
1227         int code;
1228         int hi_res, lo_res;
1229
1230         if (value == 0)
1231                 return;
1232
1233         if (usage->code == REL_WHEEL_HI_RES)
1234                 code = REL_WHEEL;
1235         else
1236                 code = REL_HWHEEL;
1237
1238         /*
1239          * Windows reports one wheel click as value 120. Where a high-res
1240          * scroll wheel is present, a fraction of 120 is reported instead.
1241          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1242          * adhere to the 120 expectation.
1243          */
1244         hi_res = value * 120/usage->resolution_multiplier;
1245
1246         usage->wheel_accumulated += hi_res;
1247         lo_res = usage->wheel_accumulated/120;
1248         if (lo_res)
1249                 usage->wheel_accumulated -= lo_res * 120;
1250
1251         input_event(input, EV_REL, code, lo_res);
1252         input_event(input, EV_REL, usage->code, hi_res);
1253 }
1254
1255 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1256 {
1257         struct input_dev *input;
1258         unsigned *quirks = &hid->quirks;
1259
1260         if (!usage->type)
1261                 return;
1262
1263         if (usage->type == EV_PWR) {
1264                 hidinput_update_battery(hid, value);
1265                 return;
1266         }
1267
1268         if (!field->hidinput)
1269                 return;
1270
1271         input = field->hidinput->input;
1272
1273         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1274                 int hat_dir = usage->hat_dir;
1275                 if (!hat_dir)
1276                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1277                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1278                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1279                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1280                 return;
1281         }
1282
1283         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1284                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1285                 return;
1286         }
1287
1288         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1289                 if (value) {
1290                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1291                         return;
1292                 }
1293                 input_event(input, usage->type, usage->code, 0);
1294                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1295                 return;
1296         }
1297
1298         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1299                 int a = field->logical_minimum;
1300                 int b = field->logical_maximum;
1301                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1302         }
1303
1304         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1305                 dbg_hid("Maximum Effects - %d\n",value);
1306                 return;
1307         }
1308
1309         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1310                 dbg_hid("PID Pool Report\n");
1311                 return;
1312         }
1313
1314         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1315                 return;
1316
1317         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1318                                         usage->code == REL_HWHEEL_HI_RES)) {
1319                 hidinput_handle_scroll(usage, input, value);
1320                 return;
1321         }
1322
1323         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1324                         (usage->code == ABS_VOLUME)) {
1325                 int count = abs(value);
1326                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1327                 int i;
1328
1329                 for (i = 0; i < count; i++) {
1330                         input_event(input, EV_KEY, direction, 1);
1331                         input_sync(input);
1332                         input_event(input, EV_KEY, direction, 0);
1333                         input_sync(input);
1334                 }
1335                 return;
1336         }
1337
1338         /*
1339          * Ignore out-of-range values as per HID specification,
1340          * section 5.10 and 6.2.25, when NULL state bit is present.
1341          * When it's not, clamp the value to match Microsoft's input
1342          * driver as mentioned in "Required HID usages for digitizers":
1343          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1344          *
1345          * The logical_minimum < logical_maximum check is done so that we
1346          * don't unintentionally discard values sent by devices which
1347          * don't specify logical min and max.
1348          */
1349         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1350             (field->logical_minimum < field->logical_maximum)) {
1351                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1352                     (value < field->logical_minimum ||
1353                      value > field->logical_maximum)) {
1354                         dbg_hid("Ignoring out-of-range value %x\n", value);
1355                         return;
1356                 }
1357                 value = clamp(value,
1358                               field->logical_minimum,
1359                               field->logical_maximum);
1360         }
1361
1362         /*
1363          * Ignore reports for absolute data if the data didn't change. This is
1364          * not only an optimization but also fixes 'dead' key reports. Some
1365          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1366          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1367          * can only have one of them physically available. The 'dead' keys
1368          * report constant 0. As all map to the same keycode, they'd confuse
1369          * the input layer. If we filter the 'dead' keys on the HID level, we
1370          * skip the keycode translation and only forward real events.
1371          */
1372         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1373                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1374                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1375             usage->usage_index < field->maxusage &&
1376             value == field->value[usage->usage_index])
1377                 return;
1378
1379         /* report the usage code as scancode if the key status has changed */
1380         if (usage->type == EV_KEY &&
1381             (!test_bit(usage->code, input->key)) == value)
1382                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1383
1384         input_event(input, usage->type, usage->code, value);
1385
1386         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1387             usage->type == EV_KEY && value) {
1388                 input_sync(input);
1389                 input_event(input, usage->type, usage->code, 0);
1390         }
1391 }
1392
1393 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1394 {
1395         struct hid_input *hidinput;
1396
1397         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1398                 return;
1399
1400         list_for_each_entry(hidinput, &hid->inputs, list)
1401                 input_sync(hidinput->input);
1402 }
1403 EXPORT_SYMBOL_GPL(hidinput_report_event);
1404
1405 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1406 {
1407         struct hid_report *report;
1408         int i, j;
1409
1410         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1411                 for (i = 0; i < report->maxfield; i++) {
1412                         *field = report->field[i];
1413                         for (j = 0; j < (*field)->maxusage; j++)
1414                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1415                                         return j;
1416                 }
1417         }
1418         return -1;
1419 }
1420 EXPORT_SYMBOL_GPL(hidinput_find_field);
1421
1422 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1423 {
1424         struct hid_report *report;
1425         struct hid_field *field;
1426         int i, j;
1427
1428         list_for_each_entry(report,
1429                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1430                             list) {
1431                 for (i = 0; i < report->maxfield; i++) {
1432                         field = report->field[i];
1433                         for (j = 0; j < field->maxusage; j++)
1434                                 if (field->usage[j].type == EV_LED)
1435                                         return field;
1436                 }
1437         }
1438         return NULL;
1439 }
1440 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1441
1442 unsigned int hidinput_count_leds(struct hid_device *hid)
1443 {
1444         struct hid_report *report;
1445         struct hid_field *field;
1446         int i, j;
1447         unsigned int count = 0;
1448
1449         list_for_each_entry(report,
1450                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1451                             list) {
1452                 for (i = 0; i < report->maxfield; i++) {
1453                         field = report->field[i];
1454                         for (j = 0; j < field->maxusage; j++)
1455                                 if (field->usage[j].type == EV_LED &&
1456                                     field->value[j])
1457                                         count += 1;
1458                 }
1459         }
1460         return count;
1461 }
1462 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1463
1464 static void hidinput_led_worker(struct work_struct *work)
1465 {
1466         struct hid_device *hid = container_of(work, struct hid_device,
1467                                               led_work);
1468         struct hid_field *field;
1469         struct hid_report *report;
1470         int ret;
1471         u32 len;
1472         __u8 *buf;
1473
1474         field = hidinput_get_led_field(hid);
1475         if (!field)
1476                 return;
1477
1478         /*
1479          * field->report is accessed unlocked regarding HID core. So there might
1480          * be another incoming SET-LED request from user-space, which changes
1481          * the LED state while we assemble our outgoing buffer. However, this
1482          * doesn't matter as hid_output_report() correctly converts it into a
1483          * boolean value no matter what information is currently set on the LED
1484          * field (even garbage). So the remote device will always get a valid
1485          * request.
1486          * And in case we send a wrong value, a next led worker is spawned
1487          * for every SET-LED request so the following worker will send the
1488          * correct value, guaranteed!
1489          */
1490
1491         report = field->report;
1492
1493         /* use custom SET_REPORT request if possible (asynchronous) */
1494         if (hid->ll_driver->request)
1495                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1496
1497         /* fall back to generic raw-output-report */
1498         len = hid_report_len(report);
1499         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1500         if (!buf)
1501                 return;
1502
1503         hid_output_report(report, buf);
1504         /* synchronous output report */
1505         ret = hid_hw_output_report(hid, buf, len);
1506         if (ret == -ENOSYS)
1507                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1508                                 HID_REQ_SET_REPORT);
1509         kfree(buf);
1510 }
1511
1512 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1513                                 unsigned int code, int value)
1514 {
1515         struct hid_device *hid = input_get_drvdata(dev);
1516         struct hid_field *field;
1517         int offset;
1518
1519         if (type == EV_FF)
1520                 return input_ff_event(dev, type, code, value);
1521
1522         if (type != EV_LED)
1523                 return -1;
1524
1525         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1526                 hid_warn(dev, "event field not found\n");
1527                 return -1;
1528         }
1529
1530         hid_set_field(field, offset, value);
1531
1532         schedule_work(&hid->led_work);
1533         return 0;
1534 }
1535
1536 static int hidinput_open(struct input_dev *dev)
1537 {
1538         struct hid_device *hid = input_get_drvdata(dev);
1539
1540         return hid_hw_open(hid);
1541 }
1542
1543 static void hidinput_close(struct input_dev *dev)
1544 {
1545         struct hid_device *hid = input_get_drvdata(dev);
1546
1547         hid_hw_close(hid);
1548 }
1549
1550 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1551                 struct hid_report *report, bool use_logical_max)
1552 {
1553         struct hid_usage *usage;
1554         bool update_needed = false;
1555         int i, j;
1556
1557         if (report->maxfield == 0)
1558                 return false;
1559
1560         /*
1561          * If we have more than one feature within this report we
1562          * need to fill in the bits from the others before we can
1563          * overwrite the ones for the Resolution Multiplier.
1564          */
1565         if (report->maxfield > 1) {
1566                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1567                 hid_hw_wait(hid);
1568         }
1569
1570         for (i = 0; i < report->maxfield; i++) {
1571                 __s32 value = use_logical_max ?
1572                               report->field[i]->logical_maximum :
1573                               report->field[i]->logical_minimum;
1574
1575                 /* There is no good reason for a Resolution
1576                  * Multiplier to have a count other than 1.
1577                  * Ignore that case.
1578                  */
1579                 if (report->field[i]->report_count != 1)
1580                         continue;
1581
1582                 for (j = 0; j < report->field[i]->maxusage; j++) {
1583                         usage = &report->field[i]->usage[j];
1584
1585                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1586                                 continue;
1587
1588                         report->field[i]->value[j] = value;
1589                         update_needed = true;
1590                 }
1591         }
1592
1593         return update_needed;
1594 }
1595
1596 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1597 {
1598         struct hid_report_enum *rep_enum;
1599         struct hid_report *rep;
1600         int ret;
1601
1602         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1603         list_for_each_entry(rep, &rep_enum->report_list, list) {
1604                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1605                                                                      rep, true);
1606
1607                 if (update_needed) {
1608                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1609                         if (ret) {
1610                                 __hidinput_change_resolution_multipliers(hid,
1611                                                                     rep, false);
1612                                 return;
1613                         }
1614                 }
1615         }
1616
1617         /* refresh our structs */
1618         hid_setup_resolution_multiplier(hid);
1619 }
1620
1621 static void report_features(struct hid_device *hid)
1622 {
1623         struct hid_driver *drv = hid->driver;
1624         struct hid_report_enum *rep_enum;
1625         struct hid_report *rep;
1626         struct hid_usage *usage;
1627         int i, j;
1628
1629         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1630         list_for_each_entry(rep, &rep_enum->report_list, list)
1631                 for (i = 0; i < rep->maxfield; i++) {
1632                         /* Ignore if report count is out of bounds. */
1633                         if (rep->field[i]->report_count < 1)
1634                                 continue;
1635
1636                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1637                                 usage = &rep->field[i]->usage[j];
1638
1639                                 /* Verify if Battery Strength feature is available */
1640                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1641                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1642                                                                rep->field[i]);
1643
1644                                 if (drv->feature_mapping)
1645                                         drv->feature_mapping(hid, rep->field[i], usage);
1646                         }
1647                 }
1648 }
1649
1650 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1651                                            unsigned int application)
1652 {
1653         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1654         struct input_dev *input_dev = input_allocate_device();
1655         const char *suffix = NULL;
1656         size_t suffix_len, name_len;
1657
1658         if (!hidinput || !input_dev)
1659                 goto fail;
1660
1661         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1662             hid->maxapplication > 1) {
1663                 switch (application) {
1664                 case HID_GD_KEYBOARD:
1665                         suffix = "Keyboard";
1666                         break;
1667                 case HID_GD_KEYPAD:
1668                         suffix = "Keypad";
1669                         break;
1670                 case HID_GD_MOUSE:
1671                         suffix = "Mouse";
1672                         break;
1673                 case HID_DG_STYLUS:
1674                         suffix = "Pen";
1675                         break;
1676                 case HID_DG_TOUCHSCREEN:
1677                         suffix = "Touchscreen";
1678                         break;
1679                 case HID_DG_TOUCHPAD:
1680                         suffix = "Touchpad";
1681                         break;
1682                 case HID_GD_SYSTEM_CONTROL:
1683                         suffix = "System Control";
1684                         break;
1685                 case HID_CP_CONSUMER_CONTROL:
1686                         suffix = "Consumer Control";
1687                         break;
1688                 case HID_GD_WIRELESS_RADIO_CTLS:
1689                         suffix = "Wireless Radio Control";
1690                         break;
1691                 case HID_GD_SYSTEM_MULTIAXIS:
1692                         suffix = "System Multi Axis";
1693                         break;
1694                 default:
1695                         break;
1696                 }
1697         }
1698
1699         if (suffix) {
1700                 name_len = strlen(hid->name);
1701                 suffix_len = strlen(suffix);
1702                 if ((name_len < suffix_len) ||
1703                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1704                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1705                                                    hid->name, suffix);
1706                         if (!hidinput->name)
1707                                 goto fail;
1708                 }
1709         }
1710
1711         input_set_drvdata(input_dev, hid);
1712         input_dev->event = hidinput_input_event;
1713         input_dev->open = hidinput_open;
1714         input_dev->close = hidinput_close;
1715         input_dev->setkeycode = hidinput_setkeycode;
1716         input_dev->getkeycode = hidinput_getkeycode;
1717
1718         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1719         input_dev->phys = hid->phys;
1720         input_dev->uniq = hid->uniq;
1721         input_dev->id.bustype = hid->bus;
1722         input_dev->id.vendor  = hid->vendor;
1723         input_dev->id.product = hid->product;
1724         input_dev->id.version = hid->version;
1725         input_dev->dev.parent = &hid->dev;
1726
1727         hidinput->input = input_dev;
1728         hidinput->application = application;
1729         list_add_tail(&hidinput->list, &hid->inputs);
1730
1731         INIT_LIST_HEAD(&hidinput->reports);
1732
1733         return hidinput;
1734
1735 fail:
1736         kfree(hidinput);
1737         input_free_device(input_dev);
1738         hid_err(hid, "Out of memory during hid input probe\n");
1739         return NULL;
1740 }
1741
1742 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1743 {
1744         int i;
1745         unsigned long r = 0;
1746
1747         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1748                 r |= hidinput->input->evbit[i];
1749
1750         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1751                 r |= hidinput->input->keybit[i];
1752
1753         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1754                 r |= hidinput->input->relbit[i];
1755
1756         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1757                 r |= hidinput->input->absbit[i];
1758
1759         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1760                 r |= hidinput->input->mscbit[i];
1761
1762         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1763                 r |= hidinput->input->ledbit[i];
1764
1765         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1766                 r |= hidinput->input->sndbit[i];
1767
1768         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1769                 r |= hidinput->input->ffbit[i];
1770
1771         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1772                 r |= hidinput->input->swbit[i];
1773
1774         return !!r;
1775 }
1776
1777 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1778                 struct hid_input *hidinput)
1779 {
1780         struct hid_report *report;
1781         int i, k;
1782
1783         list_del(&hidinput->list);
1784         input_free_device(hidinput->input);
1785         kfree(hidinput->name);
1786
1787         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1788                 if (k == HID_OUTPUT_REPORT &&
1789                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1790                         continue;
1791
1792                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1793                                     list) {
1794
1795                         for (i = 0; i < report->maxfield; i++)
1796                                 if (report->field[i]->hidinput == hidinput)
1797                                         report->field[i]->hidinput = NULL;
1798                 }
1799         }
1800
1801         kfree(hidinput);
1802 }
1803
1804 static struct hid_input *hidinput_match(struct hid_report *report)
1805 {
1806         struct hid_device *hid = report->device;
1807         struct hid_input *hidinput;
1808
1809         list_for_each_entry(hidinput, &hid->inputs, list) {
1810                 if (hidinput->report &&
1811                     hidinput->report->id == report->id)
1812                         return hidinput;
1813         }
1814
1815         return NULL;
1816 }
1817
1818 static struct hid_input *hidinput_match_application(struct hid_report *report)
1819 {
1820         struct hid_device *hid = report->device;
1821         struct hid_input *hidinput;
1822
1823         list_for_each_entry(hidinput, &hid->inputs, list) {
1824                 if (hidinput->application == report->application)
1825                         return hidinput;
1826         }
1827
1828         return NULL;
1829 }
1830
1831 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1832                                              struct hid_report *report)
1833 {
1834         int i, j;
1835
1836         for (i = 0; i < report->maxfield; i++)
1837                 for (j = 0; j < report->field[i]->maxusage; j++)
1838                         hidinput_configure_usage(hidinput, report->field[i],
1839                                                  report->field[i]->usage + j);
1840 }
1841
1842 /*
1843  * Register the input device; print a message.
1844  * Configure the input layer interface
1845  * Read all reports and initialize the absolute field values.
1846  */
1847
1848 int hidinput_connect(struct hid_device *hid, unsigned int force)
1849 {
1850         struct hid_driver *drv = hid->driver;
1851         struct hid_report *report;
1852         struct hid_input *next, *hidinput = NULL;
1853         unsigned int application;
1854         int i, k;
1855
1856         INIT_LIST_HEAD(&hid->inputs);
1857         INIT_WORK(&hid->led_work, hidinput_led_worker);
1858
1859         hid->status &= ~HID_STAT_DUP_DETECTED;
1860
1861         if (!force) {
1862                 for (i = 0; i < hid->maxcollection; i++) {
1863                         struct hid_collection *col = &hid->collection[i];
1864                         if (col->type == HID_COLLECTION_APPLICATION ||
1865                                         col->type == HID_COLLECTION_PHYSICAL)
1866                                 if (IS_INPUT_APPLICATION(col->usage))
1867                                         break;
1868                 }
1869
1870                 if (i == hid->maxcollection)
1871                         return -1;
1872         }
1873
1874         report_features(hid);
1875
1876         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1877                 if (k == HID_OUTPUT_REPORT &&
1878                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1879                         continue;
1880
1881                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1882
1883                         if (!report->maxfield)
1884                                 continue;
1885
1886                         application = report->application;
1887
1888                         /*
1889                          * Find the previous hidinput report attached
1890                          * to this report id.
1891                          */
1892                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1893                                 hidinput = hidinput_match(report);
1894                         else if (hid->maxapplication > 1 &&
1895                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1896                                 hidinput = hidinput_match_application(report);
1897
1898                         if (!hidinput) {
1899                                 hidinput = hidinput_allocate(hid, application);
1900                                 if (!hidinput)
1901                                         goto out_unwind;
1902                         }
1903
1904                         hidinput_configure_usages(hidinput, report);
1905
1906                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1907                                 hidinput->report = report;
1908
1909                         list_add_tail(&report->hidinput_list,
1910                                       &hidinput->reports);
1911                 }
1912         }
1913
1914         hidinput_change_resolution_multipliers(hid);
1915
1916         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1917                 if (drv->input_configured &&
1918                     drv->input_configured(hid, hidinput))
1919                         goto out_unwind;
1920
1921                 if (!hidinput_has_been_populated(hidinput)) {
1922                         /* no need to register an input device not populated */
1923                         hidinput_cleanup_hidinput(hid, hidinput);
1924                         continue;
1925                 }
1926
1927                 if (input_register_device(hidinput->input))
1928                         goto out_unwind;
1929                 hidinput->registered = true;
1930         }
1931
1932         if (list_empty(&hid->inputs)) {
1933                 hid_err(hid, "No inputs registered, leaving\n");
1934                 goto out_unwind;
1935         }
1936
1937         if (hid->status & HID_STAT_DUP_DETECTED)
1938                 hid_dbg(hid,
1939                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1940
1941         return 0;
1942
1943 out_unwind:
1944         /* unwind the ones we already registered */
1945         hidinput_disconnect(hid);
1946
1947         return -1;
1948 }
1949 EXPORT_SYMBOL_GPL(hidinput_connect);
1950
1951 void hidinput_disconnect(struct hid_device *hid)
1952 {
1953         struct hid_input *hidinput, *next;
1954
1955         hidinput_cleanup_battery(hid);
1956
1957         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1958                 list_del(&hidinput->list);
1959                 if (hidinput->registered)
1960                         input_unregister_device(hidinput->input);
1961                 else
1962                         input_free_device(hidinput->input);
1963                 kfree(hidinput->name);
1964                 kfree(hidinput);
1965         }
1966
1967         /* led_work is spawned by input_dev callbacks, but doesn't access the
1968          * parent input_dev at all. Once all input devices are removed, we
1969          * know that led_work will never get restarted, so we can cancel it
1970          * synchronously and are safe. */
1971         cancel_work_sync(&hid->led_work);
1972 }
1973 EXPORT_SYMBOL_GPL(hidinput_disconnect);