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         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 323                 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 324           HID_BATTERY_QUIRK_IGNORE },
 325         {}
 326 };
 327
 328 static unsigned find_battery_quirk(struct hid_device *hdev)
 329 {
 330         unsigned quirks = 0;
 331         const struct hid_device_id *match;
 332
 333         match = hid_match_id(hdev, hid_battery_quirks);
 334         if (match != NULL)
 335                 quirks = match->driver_data;
 336
 337         return quirks;
 338 }
 339
 340 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 341                                            int value)
 342 {
 343         if (dev->battery_min < dev->battery_max &&
 344             value >= dev->battery_min && value <= dev->battery_max)
 345                 value = ((value - dev->battery_min) * 100) /
 346                         (dev->battery_max - dev->battery_min);
 347
 348         return value;
 349 }
 350
 351 static int hidinput_query_battery_capacity(struct hid_device *dev)
 352 {
 353         u8 *buf;
 354         int ret;
 355
 356         buf = kmalloc(4, GFP_KERNEL);
 357         if (!buf)
 358                 return -ENOMEM;
 359
 360         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 361                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 362         if (ret < 2) {
 363                 kfree(buf);
 364                 return -ENODATA;
 365         }
 366
 367         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 368         kfree(buf);
 369         return ret;
 370 }
 371
 372 static int hidinput_get_battery_property(struct power_supply *psy,
 373                                          enum power_supply_property prop,
 374                                          union power_supply_propval *val)
 375 {
 376         struct hid_device *dev = power_supply_get_drvdata(psy);
 377         int value;
 378         int ret = 0;
 379
 380         switch (prop) {
 381         case POWER_SUPPLY_PROP_PRESENT:
 382         case POWER_SUPPLY_PROP_ONLINE:
 383                 val->intval = 1;
 384                 break;
 385
 386         case POWER_SUPPLY_PROP_CAPACITY:
 387                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 388                     !dev->battery_avoid_query) {
 389                         value = hidinput_query_battery_capacity(dev);
 390                         if (value < 0)
 391                                 return value;
 392                 } else  {
 393                         value = dev->battery_capacity;
 394                 }
 395
 396                 val->intval = value;
 397                 break;
 398
 399         case POWER_SUPPLY_PROP_MODEL_NAME:
 400                 val->strval = dev->name;
 401                 break;
 402
 403         case POWER_SUPPLY_PROP_STATUS:
 404                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 405                     !dev->battery_avoid_query) {
 406                         value = hidinput_query_battery_capacity(dev);
 407                         if (value < 0)
 408                                 return value;
 409
 410                         dev->battery_capacity = value;
 411                         dev->battery_status = HID_BATTERY_QUERIED;
 412                 }
 413
 414                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 415                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 416                 else if (dev->battery_capacity == 100)
 417                         val->intval = POWER_SUPPLY_STATUS_FULL;
 418                 else
 419                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 420                 break;
 421
 422         case POWER_SUPPLY_PROP_SCOPE:
 423                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 424                 break;
 425
 426         default:
 427                 ret = -EINVAL;
 428                 break;
 429         }
 430
 431         return ret;
 432 }
 433
 434 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 435 {
 436         struct power_supply_desc *psy_desc;
 437         struct power_supply_config psy_cfg = { .drv_data = dev, };
 438         unsigned quirks;
 439         s32 min, max;
 440         int error;
 441
 442         if (dev->battery)
 443                 return 0;       /* already initialized? */
 444
 445         quirks = find_battery_quirk(dev);
 446
 447         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 448                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 449
 450         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 451                 return 0;
 452
 453         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 454         if (!psy_desc)
 455                 return -ENOMEM;
 456
 457         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 458                                    strlen(dev->uniq) ?
 459                                         dev->uniq : dev_name(&dev->dev));
 460         if (!psy_desc->name) {
 461                 error = -ENOMEM;
 462                 goto err_free_mem;
 463         }
 464
 465         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 466         psy_desc->properties = hidinput_battery_props;
 467         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 468         psy_desc->use_for_apm = 0;
 469         psy_desc->get_property = hidinput_get_battery_property;
 470
 471         min = field->logical_minimum;
 472         max = field->logical_maximum;
 473
 474         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 475                 min = 0;
 476                 max = 100;
 477         }
 478
 479         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 480                 report_type = HID_FEATURE_REPORT;
 481
 482         dev->battery_min = min;
 483         dev->battery_max = max;
 484         dev->battery_report_type = report_type;
 485         dev->battery_report_id = field->report->id;
 486
 487         /*
 488          * Stylus is normally not connected to the device and thus we
 489          * can't query the device and get meaningful battery strength.
 490          * We have to wait for the device to report it on its own.
 491          */
 492         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 493                                    field->physical == HID_DG_STYLUS;
 494
 495         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 496         if (IS_ERR(dev->battery)) {
 497                 error = PTR_ERR(dev->battery);
 498                 hid_warn(dev, "can't register power supply: %d\n", error);
 499                 goto err_free_name;
 500         }
 501
 502         power_supply_powers(dev->battery, &dev->dev);
 503         return 0;
 504
 505 err_free_name:
 506         kfree(psy_desc->name);
 507 err_free_mem:
 508         kfree(psy_desc);
 509         dev->battery = NULL;
 510         return error;
 511 }
 512
 513 static void hidinput_cleanup_battery(struct hid_device *dev)
 514 {
 515         const struct power_supply_desc *psy_desc;
 516
 517         if (!dev->battery)
 518                 return;
 519
 520         psy_desc = dev->battery->desc;
 521         power_supply_unregister(dev->battery);
 522         kfree(psy_desc->name);
 523         kfree(psy_desc);
 524         dev->battery = NULL;
 525 }
 526
 527 static void hidinput_update_battery(struct hid_device *dev, int value)
 528 {
 529         int capacity;
 530
 531         if (!dev->battery)
 532                 return;
 533
 534         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 535                 return;
 536
 537         capacity = hidinput_scale_battery_capacity(dev, value);
 538
 539         if (dev->battery_status != HID_BATTERY_REPORTED ||
 540             capacity != dev->battery_capacity) {
 541                 dev->battery_capacity = capacity;
 542                 dev->battery_status = HID_BATTERY_REPORTED;
 543                 power_supply_changed(dev->battery);
 544         }
 545 }
 546 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 547 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 548                                   struct hid_field *field)
 549 {
 550         return 0;
 551 }
 552
 553 static void hidinput_cleanup_battery(struct hid_device *dev)
 554 {
 555 }
 556
 557 static void hidinput_update_battery(struct hid_device *dev, int value)
 558 {
 559 }
 560 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 561
 562 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 563                                      struct hid_usage *usage)
 564 {
 565         struct input_dev *input = hidinput->input;
 566         struct hid_device *device = input_get_drvdata(input);
 567         int max = 0, code;
 568         unsigned long *bit = NULL;
 569
 570         field->hidinput = hidinput;
 571
 572         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 573                 goto ignore;
 574
 575         /* Ignore if report count is out of bounds. */
 576         if (field->report_count < 1)
 577                 goto ignore;
 578
 579         /* only LED usages are supported in output fields */
 580         if (field->report_type == HID_OUTPUT_REPORT &&
 581                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 582                 goto ignore;
 583         }
 584
 585         if (device->driver->input_mapping) {
 586                 int ret = device->driver->input_mapping(device, hidinput, field,
 587                                 usage, &bit, &max);
 588                 if (ret > 0)
 589                         goto mapped;
 590                 if (ret < 0)
 591                         goto ignore;
 592         }
 593
 594         switch (usage->hid & HID_USAGE_PAGE) {
 595         case HID_UP_UNDEFINED:
 596                 goto ignore;
 597
 598         case HID_UP_KEYBOARD:
 599                 set_bit(EV_REP, input->evbit);
 600
 601                 if ((usage->hid & HID_USAGE) < 256) {
 602                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 603                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 604                 } else
 605                         map_key(KEY_UNKNOWN);
 606
 607                 break;
 608
 609         case HID_UP_BUTTON:
 610                 code = ((usage->hid - 1) & HID_USAGE);
 611
 612                 switch (field->application) {
 613                 case HID_GD_MOUSE:
 614                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 615                 case HID_GD_JOYSTICK:
 616                                 if (code <= 0xf)
 617                                         code += BTN_JOYSTICK;
 618                                 else
 619                                         code += BTN_TRIGGER_HAPPY - 0x10;
 620                                 break;
 621                 case HID_GD_GAMEPAD:
 622                                 if (code <= 0xf)
 623                                         code += BTN_GAMEPAD;
 624                                 else
 625                                         code += BTN_TRIGGER_HAPPY - 0x10;
 626                                 break;
 627                 default:
 628                         switch (field->physical) {
 629                         case HID_GD_MOUSE:
 630                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 631                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 632                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 633                         default:              code += BTN_MISC;
 634                         }
 635                 }
 636
 637                 map_key(code);
 638                 break;
 639
 640         case HID_UP_SIMULATION:
 641                 switch (usage->hid & 0xffff) {
 642                 case 0xba: map_abs(ABS_RUDDER);   break;
 643                 case 0xbb: map_abs(ABS_THROTTLE); break;
 644                 case 0xc4: map_abs(ABS_GAS);      break;
 645                 case 0xc5: map_abs(ABS_BRAKE);    break;
 646                 case 0xc8: map_abs(ABS_WHEEL);    break;
 647                 default:   goto ignore;
 648                 }
 649                 break;
 650
 651         case HID_UP_GENDESK:
 652                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 653                         switch (usage->hid & 0xf) {
 654                         case 0x1: map_key_clear(KEY_POWER);  break;
 655                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 656                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 657                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 658                         case 0x5: map_key_clear(KEY_MENU); break;
 659                         case 0x6: map_key_clear(KEY_PROG1); break;
 660                         case 0x7: map_key_clear(KEY_HELP); break;
 661                         case 0x8: map_key_clear(KEY_EXIT); break;
 662                         case 0x9: map_key_clear(KEY_SELECT); break;
 663                         case 0xa: map_key_clear(KEY_RIGHT); break;
 664                         case 0xb: map_key_clear(KEY_LEFT); break;
 665                         case 0xc: map_key_clear(KEY_UP); break;
 666                         case 0xd: map_key_clear(KEY_DOWN); break;
 667                         case 0xe: map_key_clear(KEY_POWER2); break;
 668                         case 0xf: map_key_clear(KEY_RESTART); break;
 669                         default: goto unknown;
 670                         }
 671                         break;
 672                 }
 673
 674                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 675                         switch (usage->hid & 0xf) {
 676                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 677                         default: goto ignore;
 678                         }
 679                         break;
 680                 }
 681
 682                 /*
 683                  * Some lazy vendors declare 255 usages for System Control,
 684                  * leading to the creation of ABS_X|Y axis and too many others.
 685                  * It wouldn't be a problem if joydev doesn't consider the
 686                  * device as a joystick then.
 687                  */
 688                 if (field->application == HID_GD_SYSTEM_CONTROL)
 689                         goto ignore;
 690
 691                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 692                         switch (usage->hid) {
 693                         case HID_GD_UP:    usage->hat_dir = 1; break;
 694                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 695                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 696                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 697                         default: goto unknown;
 698                         }
 699                         if (field->dpad) {
 700                                 map_abs(field->dpad);
 701                                 goto ignore;
 702                         }
 703                         map_abs(ABS_HAT0X);
 704                         break;
 705                 }
 706
 707                 switch (usage->hid) {
 708                 /* These usage IDs map directly to the usage codes. */
 709                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 710                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 711                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 712                                 map_rel(usage->hid & 0xf);
 713                         else
 714                                 map_abs_clear(usage->hid & 0xf);
 715                         break;
 716
 717                 case HID_GD_WHEEL:
 718                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 719                                 set_bit(REL_WHEEL, input->relbit);
 720                                 map_rel(REL_WHEEL_HI_RES);
 721                         } else {
 722                                 map_abs(usage->hid & 0xf);
 723                         }
 724                         break;
 725                 case HID_GD_SLIDER: case HID_GD_DIAL:
 726                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 727                                 map_rel(usage->hid & 0xf);
 728                         else
 729                                 map_abs(usage->hid & 0xf);
 730                         break;
 731
 732                 case HID_GD_HATSWITCH:
 733                         usage->hat_min = field->logical_minimum;
 734                         usage->hat_max = field->logical_maximum;
 735                         map_abs(ABS_HAT0X);
 736                         break;
 737
 738                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 739                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 740
 741                 case HID_GD_RFKILL_BTN:
 742                         /* MS wireless radio ctl extension, also check CA */
 743                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 744                                 map_key_clear(KEY_RFKILL);
 745                                 /* We need to simulate the btn release */
 746                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 747                                 break;
 748                         }
 749
 750                 default: goto unknown;
 751                 }
 752
 753                 break;
 754
 755         case HID_UP_LED:
 756                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 757                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 758                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 759                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 760                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 761                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 762                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 763                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 764                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 765                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 766                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 767                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 768
 769                 default: goto ignore;
 770                 }
 771                 break;
 772
 773         case HID_UP_DIGITIZER:
 774                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 775                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 776                 else if ((field->application & 0xff) == 0x02) /* Pen */
 777                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 778
 779                 switch (usage->hid & 0xff) {
 780                 case 0x00: /* Undefined */
 781                         goto ignore;
 782
 783                 case 0x30: /* TipPressure */
 784                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 785                                 device->quirks |= HID_QUIRK_NOTOUCH;
 786                                 set_bit(EV_KEY, input->evbit);
 787                                 set_bit(BTN_TOUCH, input->keybit);
 788                         }
 789                         map_abs_clear(ABS_PRESSURE);
 790                         break;
 791
 792                 case 0x32: /* InRange */
 793                         switch (field->physical & 0xff) {
 794                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 795                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 796                         default: map_key(BTN_TOOL_PEN); break;
 797                         }
 798                         break;
 799
 800                 case 0x3b: /* Battery Strength */
 801                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 802                         usage->type = EV_PWR;
 803                         return;
 804
 805                 case 0x3c: /* Invert */
 806                         map_key_clear(BTN_TOOL_RUBBER);
 807                         break;
 808
 809                 case 0x3d: /* X Tilt */
 810                         map_abs_clear(ABS_TILT_X);
 811                         break;
 812
 813                 case 0x3e: /* Y Tilt */
 814                         map_abs_clear(ABS_TILT_Y);
 815                         break;
 816
 817                 case 0x33: /* Touch */
 818                 case 0x42: /* TipSwitch */
 819                 case 0x43: /* TipSwitch2 */
 820                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 821                         map_key_clear(BTN_TOUCH);
 822                         break;
 823
 824                 case 0x44: /* BarrelSwitch */
 825                         map_key_clear(BTN_STYLUS);
 826                         break;
 827
 828                 case 0x45: /* ERASER */
 829                         /*
 830                          * This event is reported when eraser tip touches the surface.
 831                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 832                          * tool gets in proximity.
 833                          */
 834                         map_key_clear(BTN_TOUCH);
 835                         break;
 836
 837                 case 0x46: /* TabletPick */
 838                 case 0x5a: /* SecondaryBarrelSwitch */
 839                         map_key_clear(BTN_STYLUS2);
 840                         break;
 841
 842                 case 0x5b: /* TransducerSerialNumber */
 843                         usage->type = EV_MSC;
 844                         usage->code = MSC_SERIAL;
 845                         bit = input->mscbit;
 846                         max = MSC_MAX;
 847                         break;
 848
 849                 default:  goto unknown;
 850                 }
 851                 break;
 852
 853         case HID_UP_TELEPHONY:
 854                 switch (usage->hid & HID_USAGE) {
 855                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 856                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 857                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 858                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 859                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 860                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 861                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 862                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 863                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 864                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 865                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 866                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 867                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 868                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 869                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 870                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 871                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 872                 default: goto ignore;
 873                 }
 874                 break;
 875
 876         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 877                 switch (usage->hid & HID_USAGE) {
 878                 case 0x000: goto ignore;
 879                 case 0x030: map_key_clear(KEY_POWER);           break;
 880                 case 0x031: map_key_clear(KEY_RESTART);         break;
 881                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 882                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 883                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 884                 case 0x036: map_key_clear(BTN_MISC);            break;
 885
 886                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 887                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 888                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 889                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 890                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 891                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 892                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 893                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 894                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 895
 896                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 897                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 898                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 899                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 900                 case 0x069: map_key_clear(KEY_RED);             break;
 901                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 902                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 903                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 904                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 905
 906                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 907                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 908                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 909                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 910                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 911                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 912
 913                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 914                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 915                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 916
 917                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 918                 case 0x083: map_key_clear(KEY_LAST);            break;
 919                 case 0x084: map_key_clear(KEY_ENTER);           break;
 920                 case 0x088: map_key_clear(KEY_PC);              break;
 921                 case 0x089: map_key_clear(KEY_TV);              break;
 922                 case 0x08a: map_key_clear(KEY_WWW);             break;
 923                 case 0x08b: map_key_clear(KEY_DVD);             break;
 924                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 925                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 926                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 927                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 928                 case 0x090: map_key_clear(KEY_MEMO);            break;
 929                 case 0x091: map_key_clear(KEY_CD);              break;
 930                 case 0x092: map_key_clear(KEY_VCR);             break;
 931                 case 0x093: map_key_clear(KEY_TUNER);           break;
 932                 case 0x094: map_key_clear(KEY_EXIT);            break;
 933                 case 0x095: map_key_clear(KEY_HELP);            break;
 934                 case 0x096: map_key_clear(KEY_TAPE);            break;
 935                 case 0x097: map_key_clear(KEY_TV2);             break;
 936                 case 0x098: map_key_clear(KEY_SAT);             break;
 937                 case 0x09a: map_key_clear(KEY_PVR);             break;
 938
 939                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 940                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 941                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 942
 943                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 944                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 945                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 946                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 947                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 948                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 949                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 950                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 951                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 952                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 953                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 954                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 955
 956                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 957                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 958                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 959                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 960                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 961                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 962                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 963                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 964
 965                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 966                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 967                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 968                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 969                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 970                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 971                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 972                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 973                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 974                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 975                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 976                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 977                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 978                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 979                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 980                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 981                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 982                 case 0x192: map_key_clear(KEY_CALC);            break;
 983                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 984                 case 0x194: map_key_clear(KEY_FILE);            break;
 985                 case 0x196: map_key_clear(KEY_WWW);             break;
 986                 case 0x199: map_key_clear(KEY_CHAT);            break;
 987                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 988                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 989                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 990                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 991                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 992                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 993                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 994                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 995                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 996                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 997                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 998                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 999                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1000                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1001                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1002                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1003                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1004                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1005                 case 0x201: map_key_clear(KEY_NEW);             break;
1006                 case 0x202: map_key_clear(KEY_OPEN);            break;
1007                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1008                 case 0x204: map_key_clear(KEY_EXIT);            break;
1009                 case 0x207: map_key_clear(KEY_SAVE);            break;
1010                 case 0x208: map_key_clear(KEY_PRINT);           break;
1011                 case 0x209: map_key_clear(KEY_PROPS);           break;
1012                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1013                 case 0x21b: map_key_clear(KEY_COPY);            break;
1014                 case 0x21c: map_key_clear(KEY_CUT);             break;
1015                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1016                 case 0x21f: map_key_clear(KEY_FIND);            break;
1017                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1018                 case 0x222: map_key_clear(KEY_GOTO);            break;
1019                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1020                 case 0x224: map_key_clear(KEY_BACK);            break;
1021                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1022                 case 0x226: map_key_clear(KEY_STOP);            break;
1023                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1024                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1025                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1026                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1027                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1028                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1029                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1030                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1031                 case 0x238: /* AC Pan */
1032                         set_bit(REL_HWHEEL, input->relbit);
1033                         map_rel(REL_HWHEEL_HI_RES);
1034                         break;
1035                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1036                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1037                 case 0x269: map_key_clear(KEY_INSERT);          break;
1038                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1039                 case 0x279: map_key_clear(KEY_REDO);            break;
1040
1041                 case 0x289: map_key_clear(KEY_REPLY);           break;
1042                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1043                 case 0x28c: map_key_clear(KEY_SEND);            break;
1044
1045                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1046
1047                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1048                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1049                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1050                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1051                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1052                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1053
1054                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1055
1056                 default: map_key_clear(KEY_UNKNOWN);
1057                 }
1058                 break;
1059
1060         case HID_UP_GENDEVCTRLS:
1061                 switch (usage->hid) {
1062                 case HID_DC_BATTERYSTRENGTH:
1063                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1064                         usage->type = EV_PWR;
1065                         return;
1066                 }
1067                 goto unknown;
1068
1069         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1070                 set_bit(EV_REP, input->evbit);
1071                 switch (usage->hid & HID_USAGE) {
1072                 case 0x021: map_key_clear(KEY_PRINT);           break;
1073                 case 0x070: map_key_clear(KEY_HP);              break;
1074                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1075                 case 0x072: map_key_clear(KEY_SOUND);           break;
1076                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1077                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1078                 case 0x081: map_key_clear(KEY_CHAT);            break;
1079                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1080                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1081                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1082                 case 0x085: map_key_clear(KEY_SPORT);           break;
1083                 case 0x086: map_key_clear(KEY_SHOP);            break;
1084                 default:    goto ignore;
1085                 }
1086                 break;
1087
1088         case HID_UP_HPVENDOR2:
1089                 set_bit(EV_REP, input->evbit);
1090                 switch (usage->hid & HID_USAGE) {
1091                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1092                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1093                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1094                 default:    goto ignore;
1095                 }
1096                 break;
1097
1098         case HID_UP_MSVENDOR:
1099                 goto ignore;
1100
1101         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1102                 set_bit(EV_REP, input->evbit);
1103                 goto ignore;
1104
1105         case HID_UP_LOGIVENDOR:
1106                 /* intentional fallback */
1107         case HID_UP_LOGIVENDOR2:
1108                 /* intentional fallback */
1109         case HID_UP_LOGIVENDOR3:
1110                 goto ignore;
1111
1112         case HID_UP_PID:
1113                 switch (usage->hid & HID_USAGE) {
1114                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1115                 default: goto ignore;
1116                 }
1117                 break;
1118
1119         default:
1120         unknown:
1121                 if (field->report_size == 1) {
1122                         if (field->report->type == HID_OUTPUT_REPORT) {
1123                                 map_led(LED_MISC);
1124                                 break;
1125                         }
1126                         map_key(BTN_MISC);
1127                         break;
1128                 }
1129                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1130                         map_rel(REL_MISC);
1131                         break;
1132                 }
1133                 map_abs(ABS_MISC);
1134                 break;
1135         }
1136
1137 mapped:
1138         /* Mapping failed, bail out */
1139         if (!bit)
1140                 return;
1141
1142         if (device->driver->input_mapped &&
1143             device->driver->input_mapped(device, hidinput, field, usage,
1144                                          &bit, &max) < 0) {
1145                 /*
1146                  * The driver indicated that no further generic handling
1147                  * of the usage is desired.
1148                  */
1149                 return;
1150         }
1151
1152         set_bit(usage->type, input->evbit);
1153
1154         /*
1155          * This part is *really* controversial:
1156          * - HID aims at being generic so we should do our best to export
1157          *   all incoming events
1158          * - HID describes what events are, so there is no reason for ABS_X
1159          *   to be mapped to ABS_Y
1160          * - HID is using *_MISC+N as a default value, but nothing prevents
1161          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1162          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1163          *   processing)
1164          *
1165          * If devices still want to use this (at their own risk), they will
1166          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1167          * the default should be a reliable mapping.
1168          */
1169         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1170                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1171                         usage->code = find_next_zero_bit(bit,
1172                                                          max + 1,
1173                                                          usage->code);
1174                 } else {
1175                         device->status |= HID_STAT_DUP_DETECTED;
1176                         goto ignore;
1177                 }
1178         }
1179
1180         if (usage->code > max)
1181                 goto ignore;
1182
1183         if (usage->type == EV_ABS) {
1184
1185                 int a = field->logical_minimum;
1186                 int b = field->logical_maximum;
1187
1188                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1189                         a = field->logical_minimum = 0;
1190                         b = field->logical_maximum = 255;
1191                 }
1192
1193                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1194                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1195                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1196
1197                 input_abs_set_res(input, usage->code,
1198                                   hidinput_calc_abs_res(field, usage->code));
1199
1200                 /* use a larger default input buffer for MT devices */
1201                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1202                         input_set_events_per_packet(input, 60);
1203         }
1204
1205         if (usage->type == EV_ABS &&
1206             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1207                 int i;
1208                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1209                         input_set_abs_params(input, i, -1, 1, 0, 0);
1210                         set_bit(i, input->absbit);
1211                 }
1212                 if (usage->hat_dir && !field->dpad)
1213                         field->dpad = usage->code;
1214         }
1215
1216         /* for those devices which produce Consumer volume usage as relative,
1217          * we emulate pressing volumeup/volumedown appropriate number of times
1218          * in hidinput_hid_event()
1219          */
1220         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1221                         (usage->code == ABS_VOLUME)) {
1222                 set_bit(KEY_VOLUMEUP, input->keybit);
1223                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1224         }
1225
1226         if (usage->type == EV_KEY) {
1227                 set_bit(EV_MSC, input->evbit);
1228                 set_bit(MSC_SCAN, input->mscbit);
1229         }
1230
1231         return;
1232
1233 ignore:
1234         usage->type = 0;
1235         usage->code = 0;
1236 }
1237
1238 static void hidinput_handle_scroll(struct hid_usage *usage,
1239                                    struct input_dev *input,
1240                                    __s32 value)
1241 {
1242         int code;
1243         int hi_res, lo_res;
1244
1245         if (value == 0)
1246                 return;
1247
1248         if (usage->code == REL_WHEEL_HI_RES)
1249                 code = REL_WHEEL;
1250         else
1251                 code = REL_HWHEEL;
1252
1253         /*
1254          * Windows reports one wheel click as value 120. Where a high-res
1255          * scroll wheel is present, a fraction of 120 is reported instead.
1256          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1257          * adhere to the 120 expectation.
1258          */
1259         hi_res = value * 120/usage->resolution_multiplier;
1260
1261         usage->wheel_accumulated += hi_res;
1262         lo_res = usage->wheel_accumulated/120;
1263         if (lo_res)
1264                 usage->wheel_accumulated -= lo_res * 120;
1265
1266         input_event(input, EV_REL, code, lo_res);
1267         input_event(input, EV_REL, usage->code, hi_res);
1268 }
1269
1270 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1271 {
1272         struct input_dev *input;
1273         unsigned *quirks = &hid->quirks;
1274
1275         if (!usage->type)
1276                 return;
1277
1278         if (usage->type == EV_PWR) {
1279                 hidinput_update_battery(hid, value);
1280                 return;
1281         }
1282
1283         if (!field->hidinput)
1284                 return;
1285
1286         input = field->hidinput->input;
1287
1288         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1289                 int hat_dir = usage->hat_dir;
1290                 if (!hat_dir)
1291                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1292                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1293                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1294                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1295                 return;
1296         }
1297
1298         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1299                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1300                 return;
1301         }
1302
1303         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1304                 if (value) {
1305                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1306                         return;
1307                 }
1308                 input_event(input, usage->type, usage->code, 0);
1309                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1310                 return;
1311         }
1312
1313         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1314                 int a = field->logical_minimum;
1315                 int b = field->logical_maximum;
1316                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1317         }
1318
1319         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1320                 dbg_hid("Maximum Effects - %d\n",value);
1321                 return;
1322         }
1323
1324         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1325                 dbg_hid("PID Pool Report\n");
1326                 return;
1327         }
1328
1329         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1330                 return;
1331
1332         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1333                                         usage->code == REL_HWHEEL_HI_RES)) {
1334                 hidinput_handle_scroll(usage, input, value);
1335                 return;
1336         }
1337
1338         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1339                         (usage->code == ABS_VOLUME)) {
1340                 int count = abs(value);
1341                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1342                 int i;
1343
1344                 for (i = 0; i < count; i++) {
1345                         input_event(input, EV_KEY, direction, 1);
1346                         input_sync(input);
1347                         input_event(input, EV_KEY, direction, 0);
1348                         input_sync(input);
1349                 }
1350                 return;
1351         }
1352
1353         /*
1354          * Ignore out-of-range values as per HID specification,
1355          * section 5.10 and 6.2.25, when NULL state bit is present.
1356          * When it's not, clamp the value to match Microsoft's input
1357          * driver as mentioned in "Required HID usages for digitizers":
1358          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1359          *
1360          * The logical_minimum < logical_maximum check is done so that we
1361          * don't unintentionally discard values sent by devices which
1362          * don't specify logical min and max.
1363          */
1364         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1365             (field->logical_minimum < field->logical_maximum)) {
1366                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1367                     (value < field->logical_minimum ||
1368                      value > field->logical_maximum)) {
1369                         dbg_hid("Ignoring out-of-range value %x\n", value);
1370                         return;
1371                 }
1372                 value = clamp(value,
1373                               field->logical_minimum,
1374                               field->logical_maximum);
1375         }
1376
1377         /*
1378          * Ignore reports for absolute data if the data didn't change. This is
1379          * not only an optimization but also fixes 'dead' key reports. Some
1380          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1381          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1382          * can only have one of them physically available. The 'dead' keys
1383          * report constant 0. As all map to the same keycode, they'd confuse
1384          * the input layer. If we filter the 'dead' keys on the HID level, we
1385          * skip the keycode translation and only forward real events.
1386          */
1387         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1388                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1389                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1390             usage->usage_index < field->maxusage &&
1391             value == field->value[usage->usage_index])
1392                 return;
1393
1394         /* report the usage code as scancode if the key status has changed */
1395         if (usage->type == EV_KEY &&
1396             (!test_bit(usage->code, input->key)) == value)
1397                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1398
1399         input_event(input, usage->type, usage->code, value);
1400
1401         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1402             usage->type == EV_KEY && value) {
1403                 input_sync(input);
1404                 input_event(input, usage->type, usage->code, 0);
1405         }
1406 }
1407
1408 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1409 {
1410         struct hid_input *hidinput;
1411
1412         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1413                 return;
1414
1415         list_for_each_entry(hidinput, &hid->inputs, list)
1416                 input_sync(hidinput->input);
1417 }
1418 EXPORT_SYMBOL_GPL(hidinput_report_event);
1419
1420 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1421 {
1422         struct hid_report *report;
1423         int i, j;
1424
1425         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1426                 for (i = 0; i < report->maxfield; i++) {
1427                         *field = report->field[i];
1428                         for (j = 0; j < (*field)->maxusage; j++)
1429                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1430                                         return j;
1431                 }
1432         }
1433         return -1;
1434 }
1435 EXPORT_SYMBOL_GPL(hidinput_find_field);
1436
1437 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1438 {
1439         struct hid_report *report;
1440         struct hid_field *field;
1441         int i, j;
1442
1443         list_for_each_entry(report,
1444                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1445                             list) {
1446                 for (i = 0; i < report->maxfield; i++) {
1447                         field = report->field[i];
1448                         for (j = 0; j < field->maxusage; j++)
1449                                 if (field->usage[j].type == EV_LED)
1450                                         return field;
1451                 }
1452         }
1453         return NULL;
1454 }
1455 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1456
1457 unsigned int hidinput_count_leds(struct hid_device *hid)
1458 {
1459         struct hid_report *report;
1460         struct hid_field *field;
1461         int i, j;
1462         unsigned int count = 0;
1463
1464         list_for_each_entry(report,
1465                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1466                             list) {
1467                 for (i = 0; i < report->maxfield; i++) {
1468                         field = report->field[i];
1469                         for (j = 0; j < field->maxusage; j++)
1470                                 if (field->usage[j].type == EV_LED &&
1471                                     field->value[j])
1472                                         count += 1;
1473                 }
1474         }
1475         return count;
1476 }
1477 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1478
1479 static void hidinput_led_worker(struct work_struct *work)
1480 {
1481         struct hid_device *hid = container_of(work, struct hid_device,
1482                                               led_work);
1483         struct hid_field *field;
1484         struct hid_report *report;
1485         int ret;
1486         u32 len;
1487         __u8 *buf;
1488
1489         field = hidinput_get_led_field(hid);
1490         if (!field)
1491                 return;
1492
1493         /*
1494          * field->report is accessed unlocked regarding HID core. So there might
1495          * be another incoming SET-LED request from user-space, which changes
1496          * the LED state while we assemble our outgoing buffer. However, this
1497          * doesn't matter as hid_output_report() correctly converts it into a
1498          * boolean value no matter what information is currently set on the LED
1499          * field (even garbage). So the remote device will always get a valid
1500          * request.
1501          * And in case we send a wrong value, a next led worker is spawned
1502          * for every SET-LED request so the following worker will send the
1503          * correct value, guaranteed!
1504          */
1505
1506         report = field->report;
1507
1508         /* use custom SET_REPORT request if possible (asynchronous) */
1509         if (hid->ll_driver->request)
1510                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1511
1512         /* fall back to generic raw-output-report */
1513         len = hid_report_len(report);
1514         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1515         if (!buf)
1516                 return;
1517
1518         hid_output_report(report, buf);
1519         /* synchronous output report */
1520         ret = hid_hw_output_report(hid, buf, len);
1521         if (ret == -ENOSYS)
1522                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1523                                 HID_REQ_SET_REPORT);
1524         kfree(buf);
1525 }
1526
1527 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1528                                 unsigned int code, int value)
1529 {
1530         struct hid_device *hid = input_get_drvdata(dev);
1531         struct hid_field *field;
1532         int offset;
1533
1534         if (type == EV_FF)
1535                 return input_ff_event(dev, type, code, value);
1536
1537         if (type != EV_LED)
1538                 return -1;
1539
1540         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1541                 hid_warn(dev, "event field not found\n");
1542                 return -1;
1543         }
1544
1545         hid_set_field(field, offset, value);
1546
1547         schedule_work(&hid->led_work);
1548         return 0;
1549 }
1550
1551 static int hidinput_open(struct input_dev *dev)
1552 {
1553         struct hid_device *hid = input_get_drvdata(dev);
1554
1555         return hid_hw_open(hid);
1556 }
1557
1558 static void hidinput_close(struct input_dev *dev)
1559 {
1560         struct hid_device *hid = input_get_drvdata(dev);
1561
1562         hid_hw_close(hid);
1563 }
1564
1565 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1566                 struct hid_report *report, bool use_logical_max)
1567 {
1568         struct hid_usage *usage;
1569         bool update_needed = false;
1570         bool get_report_completed = false;
1571         int i, j;
1572
1573         if (report->maxfield == 0)
1574                 return false;
1575
1576         for (i = 0; i < report->maxfield; i++) {
1577                 __s32 value = use_logical_max ?
1578                               report->field[i]->logical_maximum :
1579                               report->field[i]->logical_minimum;
1580
1581                 /* There is no good reason for a Resolution
1582                  * Multiplier to have a count other than 1.
1583                  * Ignore that case.
1584                  */
1585                 if (report->field[i]->report_count != 1)
1586                         continue;
1587
1588                 for (j = 0; j < report->field[i]->maxusage; j++) {
1589                         usage = &report->field[i]->usage[j];
1590
1591                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1592                                 continue;
1593
1594                         /*
1595                          * If we have more than one feature within this
1596                          * report we need to fill in the bits from the
1597                          * others before we can overwrite the ones for the
1598                          * Resolution Multiplier.
1599                          *
1600                          * But if we're not allowed to read from the device,
1601                          * we just bail. Such a device should not exist
1602                          * anyway.
1603                          */
1604                         if (!get_report_completed && report->maxfield > 1) {
1605                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1606                                         return update_needed;
1607
1608                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1609                                 hid_hw_wait(hid);
1610                                 get_report_completed = true;
1611                         }
1612
1613                         report->field[i]->value[j] = value;
1614                         update_needed = true;
1615                 }
1616         }
1617
1618         return update_needed;
1619 }
1620
1621 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1622 {
1623         struct hid_report_enum *rep_enum;
1624         struct hid_report *rep;
1625         int ret;
1626
1627         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1628         list_for_each_entry(rep, &rep_enum->report_list, list) {
1629                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1630                                                                      rep, true);
1631
1632                 if (update_needed) {
1633                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1634                         if (ret) {
1635                                 __hidinput_change_resolution_multipliers(hid,
1636                                                                     rep, false);
1637                                 return;
1638                         }
1639                 }
1640         }
1641
1642         /* refresh our structs */
1643         hid_setup_resolution_multiplier(hid);
1644 }
1645
1646 static void report_features(struct hid_device *hid)
1647 {
1648         struct hid_driver *drv = hid->driver;
1649         struct hid_report_enum *rep_enum;
1650         struct hid_report *rep;
1651         struct hid_usage *usage;
1652         int i, j;
1653
1654         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1655         list_for_each_entry(rep, &rep_enum->report_list, list)
1656                 for (i = 0; i < rep->maxfield; i++) {
1657                         /* Ignore if report count is out of bounds. */
1658                         if (rep->field[i]->report_count < 1)
1659                                 continue;
1660
1661                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1662                                 usage = &rep->field[i]->usage[j];
1663
1664                                 /* Verify if Battery Strength feature is available */
1665                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1666                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1667                                                                rep->field[i]);
1668
1669                                 if (drv->feature_mapping)
1670                                         drv->feature_mapping(hid, rep->field[i], usage);
1671                         }
1672                 }
1673 }
1674
1675 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1676                                            unsigned int application)
1677 {
1678         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1679         struct input_dev *input_dev = input_allocate_device();
1680         const char *suffix = NULL;
1681         size_t suffix_len, name_len;
1682
1683         if (!hidinput || !input_dev)
1684                 goto fail;
1685
1686         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1687             hid->maxapplication > 1) {
1688                 switch (application) {
1689                 case HID_GD_KEYBOARD:
1690                         suffix = "Keyboard";
1691                         break;
1692                 case HID_GD_KEYPAD:
1693                         suffix = "Keypad";
1694                         break;
1695                 case HID_GD_MOUSE:
1696                         suffix = "Mouse";
1697                         break;
1698                 case HID_DG_STYLUS:
1699                         suffix = "Pen";
1700                         break;
1701                 case HID_DG_TOUCHSCREEN:
1702                         suffix = "Touchscreen";
1703                         break;
1704                 case HID_DG_TOUCHPAD:
1705                         suffix = "Touchpad";
1706                         break;
1707                 case HID_GD_SYSTEM_CONTROL:
1708                         suffix = "System Control";
1709                         break;
1710                 case HID_CP_CONSUMER_CONTROL:
1711                         suffix = "Consumer Control";
1712                         break;
1713                 case HID_GD_WIRELESS_RADIO_CTLS:
1714                         suffix = "Wireless Radio Control";
1715                         break;
1716                 case HID_GD_SYSTEM_MULTIAXIS:
1717                         suffix = "System Multi Axis";
1718                         break;
1719                 default:
1720                         break;
1721                 }
1722         }
1723
1724         if (suffix) {
1725                 name_len = strlen(hid->name);
1726                 suffix_len = strlen(suffix);
1727                 if ((name_len < suffix_len) ||
1728                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1729                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1730                                                    hid->name, suffix);
1731                         if (!hidinput->name)
1732                                 goto fail;
1733                 }
1734         }
1735
1736         input_set_drvdata(input_dev, hid);
1737         input_dev->event = hidinput_input_event;
1738         input_dev->open = hidinput_open;
1739         input_dev->close = hidinput_close;
1740         input_dev->setkeycode = hidinput_setkeycode;
1741         input_dev->getkeycode = hidinput_getkeycode;
1742
1743         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1744         input_dev->phys = hid->phys;
1745         input_dev->uniq = hid->uniq;
1746         input_dev->id.bustype = hid->bus;
1747         input_dev->id.vendor  = hid->vendor;
1748         input_dev->id.product = hid->product;
1749         input_dev->id.version = hid->version;
1750         input_dev->dev.parent = &hid->dev;
1751
1752         hidinput->input = input_dev;
1753         hidinput->application = application;
1754         list_add_tail(&hidinput->list, &hid->inputs);
1755
1756         INIT_LIST_HEAD(&hidinput->reports);
1757
1758         return hidinput;
1759
1760 fail:
1761         kfree(hidinput);
1762         input_free_device(input_dev);
1763         hid_err(hid, "Out of memory during hid input probe\n");
1764         return NULL;
1765 }
1766
1767 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1768 {
1769         int i;
1770         unsigned long r = 0;
1771
1772         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1773                 r |= hidinput->input->evbit[i];
1774
1775         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1776                 r |= hidinput->input->keybit[i];
1777
1778         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1779                 r |= hidinput->input->relbit[i];
1780
1781         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1782                 r |= hidinput->input->absbit[i];
1783
1784         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1785                 r |= hidinput->input->mscbit[i];
1786
1787         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1788                 r |= hidinput->input->ledbit[i];
1789
1790         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1791                 r |= hidinput->input->sndbit[i];
1792
1793         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1794                 r |= hidinput->input->ffbit[i];
1795
1796         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1797                 r |= hidinput->input->swbit[i];
1798
1799         return !!r;
1800 }
1801
1802 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1803                 struct hid_input *hidinput)
1804 {
1805         struct hid_report *report;
1806         int i, k;
1807
1808         list_del(&hidinput->list);
1809         input_free_device(hidinput->input);
1810         kfree(hidinput->name);
1811
1812         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1813                 if (k == HID_OUTPUT_REPORT &&
1814                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1815                         continue;
1816
1817                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1818                                     list) {
1819
1820                         for (i = 0; i < report->maxfield; i++)
1821                                 if (report->field[i]->hidinput == hidinput)
1822                                         report->field[i]->hidinput = NULL;
1823                 }
1824         }
1825
1826         kfree(hidinput);
1827 }
1828
1829 static struct hid_input *hidinput_match(struct hid_report *report)
1830 {
1831         struct hid_device *hid = report->device;
1832         struct hid_input *hidinput;
1833
1834         list_for_each_entry(hidinput, &hid->inputs, list) {
1835                 if (hidinput->report &&
1836                     hidinput->report->id == report->id)
1837                         return hidinput;
1838         }
1839
1840         return NULL;
1841 }
1842
1843 static struct hid_input *hidinput_match_application(struct hid_report *report)
1844 {
1845         struct hid_device *hid = report->device;
1846         struct hid_input *hidinput;
1847
1848         list_for_each_entry(hidinput, &hid->inputs, list) {
1849                 if (hidinput->application == report->application)
1850                         return hidinput;
1851         }
1852
1853         return NULL;
1854 }
1855
1856 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1857                                              struct hid_report *report)
1858 {
1859         int i, j;
1860
1861         for (i = 0; i < report->maxfield; i++)
1862                 for (j = 0; j < report->field[i]->maxusage; j++)
1863                         hidinput_configure_usage(hidinput, report->field[i],
1864                                                  report->field[i]->usage + j);
1865 }
1866
1867 /*
1868  * Register the input device; print a message.
1869  * Configure the input layer interface
1870  * Read all reports and initialize the absolute field values.
1871  */
1872
1873 int hidinput_connect(struct hid_device *hid, unsigned int force)
1874 {
1875         struct hid_driver *drv = hid->driver;
1876         struct hid_report *report;
1877         struct hid_input *next, *hidinput = NULL;
1878         unsigned int application;
1879         int i, k;
1880
1881         INIT_LIST_HEAD(&hid->inputs);
1882         INIT_WORK(&hid->led_work, hidinput_led_worker);
1883
1884         hid->status &= ~HID_STAT_DUP_DETECTED;
1885
1886         if (!force) {
1887                 for (i = 0; i < hid->maxcollection; i++) {
1888                         struct hid_collection *col = &hid->collection[i];
1889                         if (col->type == HID_COLLECTION_APPLICATION ||
1890                                         col->type == HID_COLLECTION_PHYSICAL)
1891                                 if (IS_INPUT_APPLICATION(col->usage))
1892                                         break;
1893                 }
1894
1895                 if (i == hid->maxcollection)
1896                         return -1;
1897         }
1898
1899         report_features(hid);
1900
1901         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1902                 if (k == HID_OUTPUT_REPORT &&
1903                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1904                         continue;
1905
1906                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1907
1908                         if (!report->maxfield)
1909                                 continue;
1910
1911                         application = report->application;
1912
1913                         /*
1914                          * Find the previous hidinput report attached
1915                          * to this report id.
1916                          */
1917                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1918                                 hidinput = hidinput_match(report);
1919                         else if (hid->maxapplication > 1 &&
1920                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1921                                 hidinput = hidinput_match_application(report);
1922
1923                         if (!hidinput) {
1924                                 hidinput = hidinput_allocate(hid, application);
1925                                 if (!hidinput)
1926                                         goto out_unwind;
1927                         }
1928
1929                         hidinput_configure_usages(hidinput, report);
1930
1931                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1932                                 hidinput->report = report;
1933
1934                         list_add_tail(&report->hidinput_list,
1935                                       &hidinput->reports);
1936                 }
1937         }
1938
1939         hidinput_change_resolution_multipliers(hid);
1940
1941         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1942                 if (drv->input_configured &&
1943                     drv->input_configured(hid, hidinput))
1944                         goto out_unwind;
1945
1946                 if (!hidinput_has_been_populated(hidinput)) {
1947                         /* no need to register an input device not populated */
1948                         hidinput_cleanup_hidinput(hid, hidinput);
1949                         continue;
1950                 }
1951
1952                 if (input_register_device(hidinput->input))
1953                         goto out_unwind;
1954                 hidinput->registered = true;
1955         }
1956
1957         if (list_empty(&hid->inputs)) {
1958                 hid_err(hid, "No inputs registered, leaving\n");
1959                 goto out_unwind;
1960         }
1961
1962         if (hid->status & HID_STAT_DUP_DETECTED)
1963                 hid_dbg(hid,
1964                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1965
1966         return 0;
1967
1968 out_unwind:
1969         /* unwind the ones we already registered */
1970         hidinput_disconnect(hid);
1971
1972         return -1;
1973 }
1974 EXPORT_SYMBOL_GPL(hidinput_connect);
1975
1976 void hidinput_disconnect(struct hid_device *hid)
1977 {
1978         struct hid_input *hidinput, *next;
1979
1980         hidinput_cleanup_battery(hid);
1981
1982         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1983                 list_del(&hidinput->list);
1984                 if (hidinput->registered)
1985                         input_unregister_device(hidinput->input);
1986                 else
1987                         input_free_device(hidinput->input);
1988                 kfree(hidinput->name);
1989                 kfree(hidinput);
1990         }
1991
1992         /* led_work is spawned by input_dev callbacks, but doesn't access the
1993          * parent input_dev at all. Once all input devices are removed, we
1994          * know that led_work will never get restarted, so we can cancel it
1995          * synchronously and are safe. */
1996         cancel_work_sync(&hid->led_work);
1997 }
1998 EXPORT_SYMBOL_GPL(hidinput_disconnect);