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         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 326           HID_BATTERY_QUIRK_IGNORE },
 327         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
 328           HID_BATTERY_QUIRK_IGNORE },
 329         {}
 330 };
 331
 332 static unsigned find_battery_quirk(struct hid_device *hdev)
 333 {
 334         unsigned quirks = 0;
 335         const struct hid_device_id *match;
 336
 337         match = hid_match_id(hdev, hid_battery_quirks);
 338         if (match != NULL)
 339                 quirks = match->driver_data;
 340
 341         return quirks;
 342 }
 343
 344 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 345                                            int value)
 346 {
 347         if (dev->battery_min < dev->battery_max &&
 348             value >= dev->battery_min && value <= dev->battery_max)
 349                 value = ((value - dev->battery_min) * 100) /
 350                         (dev->battery_max - dev->battery_min);
 351
 352         return value;
 353 }
 354
 355 static int hidinput_query_battery_capacity(struct hid_device *dev)
 356 {
 357         u8 *buf;
 358         int ret;
 359
 360         buf = kmalloc(4, GFP_KERNEL);
 361         if (!buf)
 362                 return -ENOMEM;
 363
 364         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 365                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 366         if (ret < 2) {
 367                 kfree(buf);
 368                 return -ENODATA;
 369         }
 370
 371         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 372         kfree(buf);
 373         return ret;
 374 }
 375
 376 static int hidinput_get_battery_property(struct power_supply *psy,
 377                                          enum power_supply_property prop,
 378                                          union power_supply_propval *val)
 379 {
 380         struct hid_device *dev = power_supply_get_drvdata(psy);
 381         int value;
 382         int ret = 0;
 383
 384         switch (prop) {
 385         case POWER_SUPPLY_PROP_PRESENT:
 386         case POWER_SUPPLY_PROP_ONLINE:
 387                 val->intval = 1;
 388                 break;
 389
 390         case POWER_SUPPLY_PROP_CAPACITY:
 391                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 392                     !dev->battery_avoid_query) {
 393                         value = hidinput_query_battery_capacity(dev);
 394                         if (value < 0)
 395                                 return value;
 396                 } else  {
 397                         value = dev->battery_capacity;
 398                 }
 399
 400                 val->intval = value;
 401                 break;
 402
 403         case POWER_SUPPLY_PROP_MODEL_NAME:
 404                 val->strval = dev->name;
 405                 break;
 406
 407         case POWER_SUPPLY_PROP_STATUS:
 408                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 409                     !dev->battery_avoid_query) {
 410                         value = hidinput_query_battery_capacity(dev);
 411                         if (value < 0)
 412                                 return value;
 413
 414                         dev->battery_capacity = value;
 415                         dev->battery_status = HID_BATTERY_QUERIED;
 416                 }
 417
 418                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 419                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 420                 else if (dev->battery_capacity == 100)
 421                         val->intval = POWER_SUPPLY_STATUS_FULL;
 422                 else
 423                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 424                 break;
 425
 426         case POWER_SUPPLY_PROP_SCOPE:
 427                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 428                 break;
 429
 430         default:
 431                 ret = -EINVAL;
 432                 break;
 433         }
 434
 435         return ret;
 436 }
 437
 438 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 439                                   struct hid_field *field, bool is_percentage)
 440 {
 441         struct power_supply_desc *psy_desc;
 442         struct power_supply_config psy_cfg = { .drv_data = dev, };
 443         unsigned quirks;
 444         s32 min, max;
 445         int error;
 446
 447         if (dev->battery)
 448                 return 0;       /* already initialized? */
 449
 450         quirks = find_battery_quirk(dev);
 451
 452         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 453                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 454
 455         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 456                 return 0;
 457
 458         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 459         if (!psy_desc)
 460                 return -ENOMEM;
 461
 462         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 463                                    strlen(dev->uniq) ?
 464                                         dev->uniq : dev_name(&dev->dev));
 465         if (!psy_desc->name) {
 466                 error = -ENOMEM;
 467                 goto err_free_mem;
 468         }
 469
 470         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 471         psy_desc->properties = hidinput_battery_props;
 472         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 473         psy_desc->use_for_apm = 0;
 474         psy_desc->get_property = hidinput_get_battery_property;
 475
 476         min = field->logical_minimum;
 477         max = field->logical_maximum;
 478
 479         if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
 480                 min = 0;
 481                 max = 100;
 482         }
 483
 484         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 485                 report_type = HID_FEATURE_REPORT;
 486
 487         dev->battery_min = min;
 488         dev->battery_max = max;
 489         dev->battery_report_type = report_type;
 490         dev->battery_report_id = field->report->id;
 491
 492         /*
 493          * Stylus is normally not connected to the device and thus we
 494          * can't query the device and get meaningful battery strength.
 495          * We have to wait for the device to report it on its own.
 496          */
 497         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 498                                    field->physical == HID_DG_STYLUS;
 499
 500         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 501         if (IS_ERR(dev->battery)) {
 502                 error = PTR_ERR(dev->battery);
 503                 hid_warn(dev, "can't register power supply: %d\n", error);
 504                 goto err_free_name;
 505         }
 506
 507         power_supply_powers(dev->battery, &dev->dev);
 508         return 0;
 509
 510 err_free_name:
 511         kfree(psy_desc->name);
 512 err_free_mem:
 513         kfree(psy_desc);
 514         dev->battery = NULL;
 515         return error;
 516 }
 517
 518 static void hidinput_cleanup_battery(struct hid_device *dev)
 519 {
 520         const struct power_supply_desc *psy_desc;
 521
 522         if (!dev->battery)
 523                 return;
 524
 525         psy_desc = dev->battery->desc;
 526         power_supply_unregister(dev->battery);
 527         kfree(psy_desc->name);
 528         kfree(psy_desc);
 529         dev->battery = NULL;
 530 }
 531
 532 static void hidinput_update_battery(struct hid_device *dev, int value)
 533 {
 534         int capacity;
 535
 536         if (!dev->battery)
 537                 return;
 538
 539         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 540                 return;
 541
 542         capacity = hidinput_scale_battery_capacity(dev, value);
 543
 544         if (dev->battery_status != HID_BATTERY_REPORTED ||
 545             capacity != dev->battery_capacity ||
 546             ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
 547                 dev->battery_capacity = capacity;
 548                 dev->battery_status = HID_BATTERY_REPORTED;
 549                 dev->battery_ratelimit_time =
 550                         ktime_add_ms(ktime_get_coarse(), 30 * 1000);
 551                 power_supply_changed(dev->battery);
 552         }
 553 }
 554 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 555 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 556                                   struct hid_field *field, bool is_percentage)
 557 {
 558         return 0;
 559 }
 560
 561 static void hidinput_cleanup_battery(struct hid_device *dev)
 562 {
 563 }
 564
 565 static void hidinput_update_battery(struct hid_device *dev, int value)
 566 {
 567 }
 568 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 569
 570 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 571                                      struct hid_usage *usage)
 572 {
 573         struct input_dev *input = hidinput->input;
 574         struct hid_device *device = input_get_drvdata(input);
 575         int max = 0, code;
 576         unsigned long *bit = NULL;
 577
 578         field->hidinput = hidinput;
 579
 580         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 581                 goto ignore;
 582
 583         /* Ignore if report count is out of bounds. */
 584         if (field->report_count < 1)
 585                 goto ignore;
 586
 587         /* only LED usages are supported in output fields */
 588         if (field->report_type == HID_OUTPUT_REPORT &&
 589                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 590                 goto ignore;
 591         }
 592
 593         if (device->driver->input_mapping) {
 594                 int ret = device->driver->input_mapping(device, hidinput, field,
 595                                 usage, &bit, &max);
 596                 if (ret > 0)
 597                         goto mapped;
 598                 if (ret < 0)
 599                         goto ignore;
 600         }
 601
 602         switch (usage->hid & HID_USAGE_PAGE) {
 603         case HID_UP_UNDEFINED:
 604                 goto ignore;
 605
 606         case HID_UP_KEYBOARD:
 607                 set_bit(EV_REP, input->evbit);
 608
 609                 if ((usage->hid & HID_USAGE) < 256) {
 610                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 611                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 612                 } else
 613                         map_key(KEY_UNKNOWN);
 614
 615                 break;
 616
 617         case HID_UP_BUTTON:
 618                 code = ((usage->hid - 1) & HID_USAGE);
 619
 620                 switch (field->application) {
 621                 case HID_GD_MOUSE:
 622                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 623                 case HID_GD_JOYSTICK:
 624                                 if (code <= 0xf)
 625                                         code += BTN_JOYSTICK;
 626                                 else
 627                                         code += BTN_TRIGGER_HAPPY - 0x10;
 628                                 break;
 629                 case HID_GD_GAMEPAD:
 630                                 if (code <= 0xf)
 631                                         code += BTN_GAMEPAD;
 632                                 else
 633                                         code += BTN_TRIGGER_HAPPY - 0x10;
 634                                 break;
 635                 default:
 636                         switch (field->physical) {
 637                         case HID_GD_MOUSE:
 638                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 639                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 640                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 641                         default:              code += BTN_MISC;
 642                         }
 643                 }
 644
 645                 map_key(code);
 646                 break;
 647
 648         case HID_UP_SIMULATION:
 649                 switch (usage->hid & 0xffff) {
 650                 case 0xba: map_abs(ABS_RUDDER);   break;
 651                 case 0xbb: map_abs(ABS_THROTTLE); break;
 652                 case 0xc4: map_abs(ABS_GAS);      break;
 653                 case 0xc5: map_abs(ABS_BRAKE);    break;
 654                 case 0xc8: map_abs(ABS_WHEEL);    break;
 655                 default:   goto ignore;
 656                 }
 657                 break;
 658
 659         case HID_UP_GENDESK:
 660                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 661                         switch (usage->hid & 0xf) {
 662                         case 0x1: map_key_clear(KEY_POWER);  break;
 663                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 664                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 665                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 666                         case 0x5: map_key_clear(KEY_MENU); break;
 667                         case 0x6: map_key_clear(KEY_PROG1); break;
 668                         case 0x7: map_key_clear(KEY_HELP); break;
 669                         case 0x8: map_key_clear(KEY_EXIT); break;
 670                         case 0x9: map_key_clear(KEY_SELECT); break;
 671                         case 0xa: map_key_clear(KEY_RIGHT); break;
 672                         case 0xb: map_key_clear(KEY_LEFT); break;
 673                         case 0xc: map_key_clear(KEY_UP); break;
 674                         case 0xd: map_key_clear(KEY_DOWN); break;
 675                         case 0xe: map_key_clear(KEY_POWER2); break;
 676                         case 0xf: map_key_clear(KEY_RESTART); break;
 677                         default: goto unknown;
 678                         }
 679                         break;
 680                 }
 681
 682                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 683                         switch (usage->hid & 0xf) {
 684                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 685                         default: goto ignore;
 686                         }
 687                         break;
 688                 }
 689
 690                 /*
 691                  * Some lazy vendors declare 255 usages for System Control,
 692                  * leading to the creation of ABS_X|Y axis and too many others.
 693                  * It wouldn't be a problem if joydev doesn't consider the
 694                  * device as a joystick then.
 695                  */
 696                 if (field->application == HID_GD_SYSTEM_CONTROL)
 697                         goto ignore;
 698
 699                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 700                         switch (usage->hid) {
 701                         case HID_GD_UP:    usage->hat_dir = 1; break;
 702                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 703                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 704                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 705                         default: goto unknown;
 706                         }
 707                         if (field->dpad) {
 708                                 map_abs(field->dpad);
 709                                 goto ignore;
 710                         }
 711                         map_abs(ABS_HAT0X);
 712                         break;
 713                 }
 714
 715                 switch (usage->hid) {
 716                 /* These usage IDs map directly to the usage codes. */
 717                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 718                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 719                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 720                                 map_rel(usage->hid & 0xf);
 721                         else
 722                                 map_abs_clear(usage->hid & 0xf);
 723                         break;
 724
 725                 case HID_GD_WHEEL:
 726                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 727                                 set_bit(REL_WHEEL, input->relbit);
 728                                 map_rel(REL_WHEEL_HI_RES);
 729                         } else {
 730                                 map_abs(usage->hid & 0xf);
 731                         }
 732                         break;
 733                 case HID_GD_SLIDER: case HID_GD_DIAL:
 734                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 735                                 map_rel(usage->hid & 0xf);
 736                         else
 737                                 map_abs(usage->hid & 0xf);
 738                         break;
 739
 740                 case HID_GD_HATSWITCH:
 741                         usage->hat_min = field->logical_minimum;
 742                         usage->hat_max = field->logical_maximum;
 743                         map_abs(ABS_HAT0X);
 744                         break;
 745
 746                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 747                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 748
 749                 case HID_GD_RFKILL_BTN:
 750                         /* MS wireless radio ctl extension, also check CA */
 751                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 752                                 map_key_clear(KEY_RFKILL);
 753                                 /* We need to simulate the btn release */
 754                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 755                                 break;
 756                         }
 757                         goto unknown;
 758
 759                 default: goto unknown;
 760                 }
 761
 762                 break;
 763
 764         case HID_UP_LED:
 765                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 766                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 767                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 768                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 769                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 770                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 771                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 772                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 773                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 774                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 775                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 776                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 777
 778                 default: goto ignore;
 779                 }
 780                 break;
 781
 782         case HID_UP_DIGITIZER:
 783                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 784                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 785                 else if ((field->application & 0xff) == 0x02) /* Pen */
 786                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 787
 788                 switch (usage->hid & 0xff) {
 789                 case 0x00: /* Undefined */
 790                         goto ignore;
 791
 792                 case 0x30: /* TipPressure */
 793                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 794                                 device->quirks |= HID_QUIRK_NOTOUCH;
 795                                 set_bit(EV_KEY, input->evbit);
 796                                 set_bit(BTN_TOUCH, input->keybit);
 797                         }
 798                         map_abs_clear(ABS_PRESSURE);
 799                         break;
 800
 801                 case 0x32: /* InRange */
 802                         switch (field->physical & 0xff) {
 803                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 804                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 805                         default: map_key(BTN_TOOL_PEN); break;
 806                         }
 807                         break;
 808
 809                 case 0x3b: /* Battery Strength */
 810                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
 811                         usage->type = EV_PWR;
 812                         return;
 813
 814                 case 0x3c: /* Invert */
 815                         map_key_clear(BTN_TOOL_RUBBER);
 816                         break;
 817
 818                 case 0x3d: /* X Tilt */
 819                         map_abs_clear(ABS_TILT_X);
 820                         break;
 821
 822                 case 0x3e: /* Y Tilt */
 823                         map_abs_clear(ABS_TILT_Y);
 824                         break;
 825
 826                 case 0x33: /* Touch */
 827                 case 0x42: /* TipSwitch */
 828                 case 0x43: /* TipSwitch2 */
 829                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 830                         map_key_clear(BTN_TOUCH);
 831                         break;
 832
 833                 case 0x44: /* BarrelSwitch */
 834                         map_key_clear(BTN_STYLUS);
 835                         break;
 836
 837                 case 0x45: /* ERASER */
 838                         /*
 839                          * This event is reported when eraser tip touches the surface.
 840                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 841                          * tool gets in proximity.
 842                          */
 843                         map_key_clear(BTN_TOUCH);
 844                         break;
 845
 846                 case 0x46: /* TabletPick */
 847                 case 0x5a: /* SecondaryBarrelSwitch */
 848                         map_key_clear(BTN_STYLUS2);
 849                         break;
 850
 851                 case 0x5b: /* TransducerSerialNumber */
 852                         usage->type = EV_MSC;
 853                         usage->code = MSC_SERIAL;
 854                         bit = input->mscbit;
 855                         max = MSC_MAX;
 856                         break;
 857
 858                 default:  goto unknown;
 859                 }
 860                 break;
 861
 862         case HID_UP_TELEPHONY:
 863                 switch (usage->hid & HID_USAGE) {
 864                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 865                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 866                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 867                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 868                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 869                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 870                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 871                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 872                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 873                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 874                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 875                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 876                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 877                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 878                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 879                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 880                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 881                 default: goto ignore;
 882                 }
 883                 break;
 884
 885         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 886                 switch (usage->hid & HID_USAGE) {
 887                 case 0x000: goto ignore;
 888                 case 0x030: map_key_clear(KEY_POWER);           break;
 889                 case 0x031: map_key_clear(KEY_RESTART);         break;
 890                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 891                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 892                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 893                 case 0x036: map_key_clear(BTN_MISC);            break;
 894
 895                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 896                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 897                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 898                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 899                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 900                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 901                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 902                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 903                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 904
 905                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 906                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 907                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 908                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 909                 case 0x069: map_key_clear(KEY_RED);             break;
 910                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 911                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 912                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 913                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 914
 915                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 916                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 917                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 918                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 919                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 920                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 921
 922                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 923                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 924                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 925
 926                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 927                 case 0x083: map_key_clear(KEY_LAST);            break;
 928                 case 0x084: map_key_clear(KEY_ENTER);           break;
 929                 case 0x088: map_key_clear(KEY_PC);              break;
 930                 case 0x089: map_key_clear(KEY_TV);              break;
 931                 case 0x08a: map_key_clear(KEY_WWW);             break;
 932                 case 0x08b: map_key_clear(KEY_DVD);             break;
 933                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 934                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 935                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 936                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 937                 case 0x090: map_key_clear(KEY_MEMO);            break;
 938                 case 0x091: map_key_clear(KEY_CD);              break;
 939                 case 0x092: map_key_clear(KEY_VCR);             break;
 940                 case 0x093: map_key_clear(KEY_TUNER);           break;
 941                 case 0x094: map_key_clear(KEY_EXIT);            break;
 942                 case 0x095: map_key_clear(KEY_HELP);            break;
 943                 case 0x096: map_key_clear(KEY_TAPE);            break;
 944                 case 0x097: map_key_clear(KEY_TV2);             break;
 945                 case 0x098: map_key_clear(KEY_SAT);             break;
 946                 case 0x09a: map_key_clear(KEY_PVR);             break;
 947
 948                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 949                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 950                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 951
 952                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 953                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 954                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 955                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 956                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 957                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 958                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 959                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 960                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 961                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 962                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 963                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 964
 965                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 966                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 967
 968                 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);    break;
 969
 970                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 971                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 972                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 973                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 974                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 975                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 976
 977                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 978                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 979                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 980                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 981                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 982                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 983                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 984                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 985                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 986                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 987                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 988                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 989                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 990                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 991                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 992                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 993                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 994                 case 0x192: map_key_clear(KEY_CALC);            break;
 995                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 996                 case 0x194: map_key_clear(KEY_FILE);            break;
 997                 case 0x196: map_key_clear(KEY_WWW);             break;
 998                 case 0x199: map_key_clear(KEY_CHAT);            break;
 999                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
1000                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
1001                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
1002                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1003                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1004                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1005                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1006                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1007                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1008                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1009                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1010                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1011                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1012                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1013                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1014                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1015                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1016                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1017                 case 0x201: map_key_clear(KEY_NEW);             break;
1018                 case 0x202: map_key_clear(KEY_OPEN);            break;
1019                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1020                 case 0x204: map_key_clear(KEY_EXIT);            break;
1021                 case 0x207: map_key_clear(KEY_SAVE);            break;
1022                 case 0x208: map_key_clear(KEY_PRINT);           break;
1023                 case 0x209: map_key_clear(KEY_PROPS);           break;
1024                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1025                 case 0x21b: map_key_clear(KEY_COPY);            break;
1026                 case 0x21c: map_key_clear(KEY_CUT);             break;
1027                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1028                 case 0x21f: map_key_clear(KEY_FIND);            break;
1029                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1030                 case 0x222: map_key_clear(KEY_GOTO);            break;
1031                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1032                 case 0x224: map_key_clear(KEY_BACK);            break;
1033                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1034                 case 0x226: map_key_clear(KEY_STOP);            break;
1035                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1036                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1037                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1038                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1039                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1040                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1041                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1042                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1043                 case 0x238: /* AC Pan */
1044                         set_bit(REL_HWHEEL, input->relbit);
1045                         map_rel(REL_HWHEEL_HI_RES);
1046                         break;
1047                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1048                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1049                 case 0x269: map_key_clear(KEY_INSERT);          break;
1050                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1051                 case 0x279: map_key_clear(KEY_REDO);            break;
1052
1053                 case 0x289: map_key_clear(KEY_REPLY);           break;
1054                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1055                 case 0x28c: map_key_clear(KEY_SEND);            break;
1056
1057                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1058
1059                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1060                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1061                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1062                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1063                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1064                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1065
1066                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1067
1068                 default: map_key_clear(KEY_UNKNOWN);
1069                 }
1070                 break;
1071
1072         case HID_UP_GENDEVCTRLS:
1073                 switch (usage->hid) {
1074                 case HID_DC_BATTERYSTRENGTH:
1075                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1076                         usage->type = EV_PWR;
1077                         return;
1078                 }
1079                 goto unknown;
1080
1081         case HID_UP_BATTERY:
1082                 switch (usage->hid) {
1083                 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1084                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1085                         usage->type = EV_PWR;
1086                         return;
1087                 }
1088                 goto unknown;
1089
1090         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1091                 set_bit(EV_REP, input->evbit);
1092                 switch (usage->hid & HID_USAGE) {
1093                 case 0x021: map_key_clear(KEY_PRINT);           break;
1094                 case 0x070: map_key_clear(KEY_HP);              break;
1095                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1096                 case 0x072: map_key_clear(KEY_SOUND);           break;
1097                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1098                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1099                 case 0x081: map_key_clear(KEY_CHAT);            break;
1100                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1101                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1102                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1103                 case 0x085: map_key_clear(KEY_SPORT);           break;
1104                 case 0x086: map_key_clear(KEY_SHOP);            break;
1105                 default:    goto ignore;
1106                 }
1107                 break;
1108
1109         case HID_UP_HPVENDOR2:
1110                 set_bit(EV_REP, input->evbit);
1111                 switch (usage->hid & HID_USAGE) {
1112                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1113                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1114                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1115                 default:    goto ignore;
1116                 }
1117                 break;
1118
1119         case HID_UP_MSVENDOR:
1120                 goto ignore;
1121
1122         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1123                 set_bit(EV_REP, input->evbit);
1124                 goto ignore;
1125
1126         case HID_UP_LOGIVENDOR:
1127                 /* intentional fallback */
1128         case HID_UP_LOGIVENDOR2:
1129                 /* intentional fallback */
1130         case HID_UP_LOGIVENDOR3:
1131                 goto ignore;
1132
1133         case HID_UP_PID:
1134                 switch (usage->hid & HID_USAGE) {
1135                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1136                 default: goto ignore;
1137                 }
1138                 break;
1139
1140         default:
1141         unknown:
1142                 if (field->report_size == 1) {
1143                         if (field->report->type == HID_OUTPUT_REPORT) {
1144                                 map_led(LED_MISC);
1145                                 break;
1146                         }
1147                         map_key(BTN_MISC);
1148                         break;
1149                 }
1150                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1151                         map_rel(REL_MISC);
1152                         break;
1153                 }
1154                 map_abs(ABS_MISC);
1155                 break;
1156         }
1157
1158 mapped:
1159         /* Mapping failed, bail out */
1160         if (!bit)
1161                 return;
1162
1163         if (device->driver->input_mapped &&
1164             device->driver->input_mapped(device, hidinput, field, usage,
1165                                          &bit, &max) < 0) {
1166                 /*
1167                  * The driver indicated that no further generic handling
1168                  * of the usage is desired.
1169                  */
1170                 return;
1171         }
1172
1173         set_bit(usage->type, input->evbit);
1174
1175         /*
1176          * This part is *really* controversial:
1177          * - HID aims at being generic so we should do our best to export
1178          *   all incoming events
1179          * - HID describes what events are, so there is no reason for ABS_X
1180          *   to be mapped to ABS_Y
1181          * - HID is using *_MISC+N as a default value, but nothing prevents
1182          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1183          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1184          *   processing)
1185          *
1186          * If devices still want to use this (at their own risk), they will
1187          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1188          * the default should be a reliable mapping.
1189          */
1190         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1191                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1192                         usage->code = find_next_zero_bit(bit,
1193                                                          max + 1,
1194                                                          usage->code);
1195                 } else {
1196                         device->status |= HID_STAT_DUP_DETECTED;
1197                         goto ignore;
1198                 }
1199         }
1200
1201         if (usage->code > max)
1202                 goto ignore;
1203
1204         if (usage->type == EV_ABS) {
1205
1206                 int a = field->logical_minimum;
1207                 int b = field->logical_maximum;
1208
1209                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1210                         a = field->logical_minimum = 0;
1211                         b = field->logical_maximum = 255;
1212                 }
1213
1214                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1215                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1216                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1217
1218                 input_abs_set_res(input, usage->code,
1219                                   hidinput_calc_abs_res(field, usage->code));
1220
1221                 /* use a larger default input buffer for MT devices */
1222                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1223                         input_set_events_per_packet(input, 60);
1224         }
1225
1226         if (usage->type == EV_ABS &&
1227             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1228                 int i;
1229                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1230                         input_set_abs_params(input, i, -1, 1, 0, 0);
1231                         set_bit(i, input->absbit);
1232                 }
1233                 if (usage->hat_dir && !field->dpad)
1234                         field->dpad = usage->code;
1235         }
1236
1237         /* for those devices which produce Consumer volume usage as relative,
1238          * we emulate pressing volumeup/volumedown appropriate number of times
1239          * in hidinput_hid_event()
1240          */
1241         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1242                         (usage->code == ABS_VOLUME)) {
1243                 set_bit(KEY_VOLUMEUP, input->keybit);
1244                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1245         }
1246
1247         if (usage->type == EV_KEY) {
1248                 set_bit(EV_MSC, input->evbit);
1249                 set_bit(MSC_SCAN, input->mscbit);
1250         }
1251
1252         return;
1253
1254 ignore:
1255         usage->type = 0;
1256         usage->code = 0;
1257 }
1258
1259 static void hidinput_handle_scroll(struct hid_usage *usage,
1260                                    struct input_dev *input,
1261                                    __s32 value)
1262 {
1263         int code;
1264         int hi_res, lo_res;
1265
1266         if (value == 0)
1267                 return;
1268
1269         if (usage->code == REL_WHEEL_HI_RES)
1270                 code = REL_WHEEL;
1271         else
1272                 code = REL_HWHEEL;
1273
1274         /*
1275          * Windows reports one wheel click as value 120. Where a high-res
1276          * scroll wheel is present, a fraction of 120 is reported instead.
1277          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1278          * adhere to the 120 expectation.
1279          */
1280         hi_res = value * 120/usage->resolution_multiplier;
1281
1282         usage->wheel_accumulated += hi_res;
1283         lo_res = usage->wheel_accumulated/120;
1284         if (lo_res)
1285                 usage->wheel_accumulated -= lo_res * 120;
1286
1287         input_event(input, EV_REL, code, lo_res);
1288         input_event(input, EV_REL, usage->code, hi_res);
1289 }
1290
1291 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1292 {
1293         struct input_dev *input;
1294         unsigned *quirks = &hid->quirks;
1295
1296         if (!usage->type)
1297                 return;
1298
1299         if (usage->type == EV_PWR) {
1300                 hidinput_update_battery(hid, value);
1301                 return;
1302         }
1303
1304         if (!field->hidinput)
1305                 return;
1306
1307         input = field->hidinput->input;
1308
1309         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1310                 int hat_dir = usage->hat_dir;
1311                 if (!hat_dir)
1312                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1313                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1314                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1315                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1316                 return;
1317         }
1318
1319         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1320                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1321                 return;
1322         }
1323
1324         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1325                 if (value) {
1326                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1327                         return;
1328                 }
1329                 input_event(input, usage->type, usage->code, 0);
1330                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1331                 return;
1332         }
1333
1334         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1335                 int a = field->logical_minimum;
1336                 int b = field->logical_maximum;
1337                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1338         }
1339
1340         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1341                 dbg_hid("Maximum Effects - %d\n",value);
1342                 return;
1343         }
1344
1345         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1346                 dbg_hid("PID Pool Report\n");
1347                 return;
1348         }
1349
1350         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1351                 return;
1352
1353         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1354                                         usage->code == REL_HWHEEL_HI_RES)) {
1355                 hidinput_handle_scroll(usage, input, value);
1356                 return;
1357         }
1358
1359         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1360                         (usage->code == ABS_VOLUME)) {
1361                 int count = abs(value);
1362                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1363                 int i;
1364
1365                 for (i = 0; i < count; i++) {
1366                         input_event(input, EV_KEY, direction, 1);
1367                         input_sync(input);
1368                         input_event(input, EV_KEY, direction, 0);
1369                         input_sync(input);
1370                 }
1371                 return;
1372         }
1373
1374         /*
1375          * Ignore out-of-range values as per HID specification,
1376          * section 5.10 and 6.2.25, when NULL state bit is present.
1377          * When it's not, clamp the value to match Microsoft's input
1378          * driver as mentioned in "Required HID usages for digitizers":
1379          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1380          *
1381          * The logical_minimum < logical_maximum check is done so that we
1382          * don't unintentionally discard values sent by devices which
1383          * don't specify logical min and max.
1384          */
1385         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1386             (field->logical_minimum < field->logical_maximum)) {
1387                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1388                     (value < field->logical_minimum ||
1389                      value > field->logical_maximum)) {
1390                         dbg_hid("Ignoring out-of-range value %x\n", value);
1391                         return;
1392                 }
1393                 value = clamp(value,
1394                               field->logical_minimum,
1395                               field->logical_maximum);
1396         }
1397
1398         /*
1399          * Ignore reports for absolute data if the data didn't change. This is
1400          * not only an optimization but also fixes 'dead' key reports. Some
1401          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1402          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1403          * can only have one of them physically available. The 'dead' keys
1404          * report constant 0. As all map to the same keycode, they'd confuse
1405          * the input layer. If we filter the 'dead' keys on the HID level, we
1406          * skip the keycode translation and only forward real events.
1407          */
1408         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1409                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1410                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1411             usage->usage_index < field->maxusage &&
1412             value == field->value[usage->usage_index])
1413                 return;
1414
1415         /* report the usage code as scancode if the key status has changed */
1416         if (usage->type == EV_KEY &&
1417             (!test_bit(usage->code, input->key)) == value)
1418                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1419
1420         input_event(input, usage->type, usage->code, value);
1421
1422         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1423             usage->type == EV_KEY && value) {
1424                 input_sync(input);
1425                 input_event(input, usage->type, usage->code, 0);
1426         }
1427 }
1428
1429 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1430 {
1431         struct hid_input *hidinput;
1432
1433         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1434                 return;
1435
1436         list_for_each_entry(hidinput, &hid->inputs, list)
1437                 input_sync(hidinput->input);
1438 }
1439 EXPORT_SYMBOL_GPL(hidinput_report_event);
1440
1441 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1442 {
1443         struct hid_report *report;
1444         int i, j;
1445
1446         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1447                 for (i = 0; i < report->maxfield; i++) {
1448                         *field = report->field[i];
1449                         for (j = 0; j < (*field)->maxusage; j++)
1450                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1451                                         return j;
1452                 }
1453         }
1454         return -1;
1455 }
1456 EXPORT_SYMBOL_GPL(hidinput_find_field);
1457
1458 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1459 {
1460         struct hid_report *report;
1461         struct hid_field *field;
1462         int i, j;
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                                         return field;
1472                 }
1473         }
1474         return NULL;
1475 }
1476 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1477
1478 unsigned int hidinput_count_leds(struct hid_device *hid)
1479 {
1480         struct hid_report *report;
1481         struct hid_field *field;
1482         int i, j;
1483         unsigned int count = 0;
1484
1485         list_for_each_entry(report,
1486                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1487                             list) {
1488                 for (i = 0; i < report->maxfield; i++) {
1489                         field = report->field[i];
1490                         for (j = 0; j < field->maxusage; j++)
1491                                 if (field->usage[j].type == EV_LED &&
1492                                     field->value[j])
1493                                         count += 1;
1494                 }
1495         }
1496         return count;
1497 }
1498 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1499
1500 static void hidinput_led_worker(struct work_struct *work)
1501 {
1502         struct hid_device *hid = container_of(work, struct hid_device,
1503                                               led_work);
1504         struct hid_field *field;
1505         struct hid_report *report;
1506         int ret;
1507         u32 len;
1508         __u8 *buf;
1509
1510         field = hidinput_get_led_field(hid);
1511         if (!field)
1512                 return;
1513
1514         /*
1515          * field->report is accessed unlocked regarding HID core. So there might
1516          * be another incoming SET-LED request from user-space, which changes
1517          * the LED state while we assemble our outgoing buffer. However, this
1518          * doesn't matter as hid_output_report() correctly converts it into a
1519          * boolean value no matter what information is currently set on the LED
1520          * field (even garbage). So the remote device will always get a valid
1521          * request.
1522          * And in case we send a wrong value, a next led worker is spawned
1523          * for every SET-LED request so the following worker will send the
1524          * correct value, guaranteed!
1525          */
1526
1527         report = field->report;
1528
1529         /* use custom SET_REPORT request if possible (asynchronous) */
1530         if (hid->ll_driver->request)
1531                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1532
1533         /* fall back to generic raw-output-report */
1534         len = hid_report_len(report);
1535         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1536         if (!buf)
1537                 return;
1538
1539         hid_output_report(report, buf);
1540         /* synchronous output report */
1541         ret = hid_hw_output_report(hid, buf, len);
1542         if (ret == -ENOSYS)
1543                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1544                                 HID_REQ_SET_REPORT);
1545         kfree(buf);
1546 }
1547
1548 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1549                                 unsigned int code, int value)
1550 {
1551         struct hid_device *hid = input_get_drvdata(dev);
1552         struct hid_field *field;
1553         int offset;
1554
1555         if (type == EV_FF)
1556                 return input_ff_event(dev, type, code, value);
1557
1558         if (type != EV_LED)
1559                 return -1;
1560
1561         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1562                 hid_warn(dev, "event field not found\n");
1563                 return -1;
1564         }
1565
1566         hid_set_field(field, offset, value);
1567
1568         schedule_work(&hid->led_work);
1569         return 0;
1570 }
1571
1572 static int hidinput_open(struct input_dev *dev)
1573 {
1574         struct hid_device *hid = input_get_drvdata(dev);
1575
1576         return hid_hw_open(hid);
1577 }
1578
1579 static void hidinput_close(struct input_dev *dev)
1580 {
1581         struct hid_device *hid = input_get_drvdata(dev);
1582
1583         hid_hw_close(hid);
1584 }
1585
1586 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1587                 struct hid_report *report, bool use_logical_max)
1588 {
1589         struct hid_usage *usage;
1590         bool update_needed = false;
1591         bool get_report_completed = false;
1592         int i, j;
1593
1594         if (report->maxfield == 0)
1595                 return false;
1596
1597         for (i = 0; i < report->maxfield; i++) {
1598                 __s32 value = use_logical_max ?
1599                               report->field[i]->logical_maximum :
1600                               report->field[i]->logical_minimum;
1601
1602                 /* There is no good reason for a Resolution
1603                  * Multiplier to have a count other than 1.
1604                  * Ignore that case.
1605                  */
1606                 if (report->field[i]->report_count != 1)
1607                         continue;
1608
1609                 for (j = 0; j < report->field[i]->maxusage; j++) {
1610                         usage = &report->field[i]->usage[j];
1611
1612                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1613                                 continue;
1614
1615                         /*
1616                          * If we have more than one feature within this
1617                          * report we need to fill in the bits from the
1618                          * others before we can overwrite the ones for the
1619                          * Resolution Multiplier.
1620                          *
1621                          * But if we're not allowed to read from the device,
1622                          * we just bail. Such a device should not exist
1623                          * anyway.
1624                          */
1625                         if (!get_report_completed && report->maxfield > 1) {
1626                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1627                                         return update_needed;
1628
1629                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1630                                 hid_hw_wait(hid);
1631                                 get_report_completed = true;
1632                         }
1633
1634                         report->field[i]->value[j] = value;
1635                         update_needed = true;
1636                 }
1637         }
1638
1639         return update_needed;
1640 }
1641
1642 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1643 {
1644         struct hid_report_enum *rep_enum;
1645         struct hid_report *rep;
1646         int ret;
1647
1648         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1649         list_for_each_entry(rep, &rep_enum->report_list, list) {
1650                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1651                                                                      rep, true);
1652
1653                 if (update_needed) {
1654                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1655                         if (ret) {
1656                                 __hidinput_change_resolution_multipliers(hid,
1657                                                                     rep, false);
1658                                 return;
1659                         }
1660                 }
1661         }
1662
1663         /* refresh our structs */
1664         hid_setup_resolution_multiplier(hid);
1665 }
1666
1667 static void report_features(struct hid_device *hid)
1668 {
1669         struct hid_driver *drv = hid->driver;
1670         struct hid_report_enum *rep_enum;
1671         struct hid_report *rep;
1672         struct hid_usage *usage;
1673         int i, j;
1674
1675         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1676         list_for_each_entry(rep, &rep_enum->report_list, list)
1677                 for (i = 0; i < rep->maxfield; i++) {
1678                         /* Ignore if report count is out of bounds. */
1679                         if (rep->field[i]->report_count < 1)
1680                                 continue;
1681
1682                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1683                                 usage = &rep->field[i]->usage[j];
1684
1685                                 /* Verify if Battery Strength feature is available */
1686                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1687                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1688                                                                rep->field[i], false);
1689
1690                                 if (drv->feature_mapping)
1691                                         drv->feature_mapping(hid, rep->field[i], usage);
1692                         }
1693                 }
1694 }
1695
1696 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1697                                            unsigned int application)
1698 {
1699         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1700         struct input_dev *input_dev = input_allocate_device();
1701         const char *suffix = NULL;
1702         size_t suffix_len, name_len;
1703
1704         if (!hidinput || !input_dev)
1705                 goto fail;
1706
1707         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1708             hid->maxapplication > 1) {
1709                 switch (application) {
1710                 case HID_GD_KEYBOARD:
1711                         suffix = "Keyboard";
1712                         break;
1713                 case HID_GD_KEYPAD:
1714                         suffix = "Keypad";
1715                         break;
1716                 case HID_GD_MOUSE:
1717                         suffix = "Mouse";
1718                         break;
1719                 case HID_DG_STYLUS:
1720                         suffix = "Pen";
1721                         break;
1722                 case HID_DG_TOUCHSCREEN:
1723                         suffix = "Touchscreen";
1724                         break;
1725                 case HID_DG_TOUCHPAD:
1726                         suffix = "Touchpad";
1727                         break;
1728                 case HID_GD_SYSTEM_CONTROL:
1729                         suffix = "System Control";
1730                         break;
1731                 case HID_CP_CONSUMER_CONTROL:
1732                         suffix = "Consumer Control";
1733                         break;
1734                 case HID_GD_WIRELESS_RADIO_CTLS:
1735                         suffix = "Wireless Radio Control";
1736                         break;
1737                 case HID_GD_SYSTEM_MULTIAXIS:
1738                         suffix = "System Multi Axis";
1739                         break;
1740                 default:
1741                         break;
1742                 }
1743         }
1744
1745         if (suffix) {
1746                 name_len = strlen(hid->name);
1747                 suffix_len = strlen(suffix);
1748                 if ((name_len < suffix_len) ||
1749                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1750                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1751                                                    hid->name, suffix);
1752                         if (!hidinput->name)
1753                                 goto fail;
1754                 }
1755         }
1756
1757         input_set_drvdata(input_dev, hid);
1758         input_dev->event = hidinput_input_event;
1759         input_dev->open = hidinput_open;
1760         input_dev->close = hidinput_close;
1761         input_dev->setkeycode = hidinput_setkeycode;
1762         input_dev->getkeycode = hidinput_getkeycode;
1763
1764         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1765         input_dev->phys = hid->phys;
1766         input_dev->uniq = hid->uniq;
1767         input_dev->id.bustype = hid->bus;
1768         input_dev->id.vendor  = hid->vendor;
1769         input_dev->id.product = hid->product;
1770         input_dev->id.version = hid->version;
1771         input_dev->dev.parent = &hid->dev;
1772
1773         hidinput->input = input_dev;
1774         hidinput->application = application;
1775         list_add_tail(&hidinput->list, &hid->inputs);
1776
1777         INIT_LIST_HEAD(&hidinput->reports);
1778
1779         return hidinput;
1780
1781 fail:
1782         kfree(hidinput);
1783         input_free_device(input_dev);
1784         hid_err(hid, "Out of memory during hid input probe\n");
1785         return NULL;
1786 }
1787
1788 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1789 {
1790         int i;
1791         unsigned long r = 0;
1792
1793         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1794                 r |= hidinput->input->evbit[i];
1795
1796         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1797                 r |= hidinput->input->keybit[i];
1798
1799         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1800                 r |= hidinput->input->relbit[i];
1801
1802         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1803                 r |= hidinput->input->absbit[i];
1804
1805         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1806                 r |= hidinput->input->mscbit[i];
1807
1808         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1809                 r |= hidinput->input->ledbit[i];
1810
1811         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1812                 r |= hidinput->input->sndbit[i];
1813
1814         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1815                 r |= hidinput->input->ffbit[i];
1816
1817         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1818                 r |= hidinput->input->swbit[i];
1819
1820         return !!r;
1821 }
1822
1823 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1824                 struct hid_input *hidinput)
1825 {
1826         struct hid_report *report;
1827         int i, k;
1828
1829         list_del(&hidinput->list);
1830         input_free_device(hidinput->input);
1831         kfree(hidinput->name);
1832
1833         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1834                 if (k == HID_OUTPUT_REPORT &&
1835                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1836                         continue;
1837
1838                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1839                                     list) {
1840
1841                         for (i = 0; i < report->maxfield; i++)
1842                                 if (report->field[i]->hidinput == hidinput)
1843                                         report->field[i]->hidinput = NULL;
1844                 }
1845         }
1846
1847         kfree(hidinput);
1848 }
1849
1850 static struct hid_input *hidinput_match(struct hid_report *report)
1851 {
1852         struct hid_device *hid = report->device;
1853         struct hid_input *hidinput;
1854
1855         list_for_each_entry(hidinput, &hid->inputs, list) {
1856                 if (hidinput->report &&
1857                     hidinput->report->id == report->id)
1858                         return hidinput;
1859         }
1860
1861         return NULL;
1862 }
1863
1864 static struct hid_input *hidinput_match_application(struct hid_report *report)
1865 {
1866         struct hid_device *hid = report->device;
1867         struct hid_input *hidinput;
1868
1869         list_for_each_entry(hidinput, &hid->inputs, list) {
1870                 if (hidinput->application == report->application)
1871                         return hidinput;
1872
1873                 /*
1874                  * Keep SystemControl and ConsumerControl applications together
1875                  * with the main keyboard, if present.
1876                  */
1877                 if ((report->application == HID_GD_SYSTEM_CONTROL ||
1878                      report->application == HID_CP_CONSUMER_CONTROL) &&
1879                     hidinput->application == HID_GD_KEYBOARD) {
1880                         return hidinput;
1881                 }
1882         }
1883
1884         return NULL;
1885 }
1886
1887 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1888                                              struct hid_report *report)
1889 {
1890         int i, j;
1891
1892         for (i = 0; i < report->maxfield; i++)
1893                 for (j = 0; j < report->field[i]->maxusage; j++)
1894                         hidinput_configure_usage(hidinput, report->field[i],
1895                                                  report->field[i]->usage + j);
1896 }
1897
1898 /*
1899  * Register the input device; print a message.
1900  * Configure the input layer interface
1901  * Read all reports and initialize the absolute field values.
1902  */
1903
1904 int hidinput_connect(struct hid_device *hid, unsigned int force)
1905 {
1906         struct hid_driver *drv = hid->driver;
1907         struct hid_report *report;
1908         struct hid_input *next, *hidinput = NULL;
1909         unsigned int application;
1910         int i, k;
1911
1912         INIT_LIST_HEAD(&hid->inputs);
1913         INIT_WORK(&hid->led_work, hidinput_led_worker);
1914
1915         hid->status &= ~HID_STAT_DUP_DETECTED;
1916
1917         if (!force) {
1918                 for (i = 0; i < hid->maxcollection; i++) {
1919                         struct hid_collection *col = &hid->collection[i];
1920                         if (col->type == HID_COLLECTION_APPLICATION ||
1921                                         col->type == HID_COLLECTION_PHYSICAL)
1922                                 if (IS_INPUT_APPLICATION(col->usage))
1923                                         break;
1924                 }
1925
1926                 if (i == hid->maxcollection)
1927                         return -1;
1928         }
1929
1930         report_features(hid);
1931
1932         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1933                 if (k == HID_OUTPUT_REPORT &&
1934                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1935                         continue;
1936
1937                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1938
1939                         if (!report->maxfield)
1940                                 continue;
1941
1942                         application = report->application;
1943
1944                         /*
1945                          * Find the previous hidinput report attached
1946                          * to this report id.
1947                          */
1948                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1949                                 hidinput = hidinput_match(report);
1950                         else if (hid->maxapplication > 1 &&
1951                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1952                                 hidinput = hidinput_match_application(report);
1953
1954                         if (!hidinput) {
1955                                 hidinput = hidinput_allocate(hid, application);
1956                                 if (!hidinput)
1957                                         goto out_unwind;
1958                         }
1959
1960                         hidinput_configure_usages(hidinput, report);
1961
1962                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1963                                 hidinput->report = report;
1964
1965                         list_add_tail(&report->hidinput_list,
1966                                       &hidinput->reports);
1967                 }
1968         }
1969
1970         hidinput_change_resolution_multipliers(hid);
1971
1972         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1973                 if (drv->input_configured &&
1974                     drv->input_configured(hid, hidinput))
1975                         goto out_unwind;
1976
1977                 if (!hidinput_has_been_populated(hidinput)) {
1978                         /* no need to register an input device not populated */
1979                         hidinput_cleanup_hidinput(hid, hidinput);
1980                         continue;
1981                 }
1982
1983                 if (input_register_device(hidinput->input))
1984                         goto out_unwind;
1985                 hidinput->registered = true;
1986         }
1987
1988         if (list_empty(&hid->inputs)) {
1989                 hid_err(hid, "No inputs registered, leaving\n");
1990                 goto out_unwind;
1991         }
1992
1993         if (hid->status & HID_STAT_DUP_DETECTED)
1994                 hid_dbg(hid,
1995                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1996
1997         return 0;
1998
1999 out_unwind:
2000         /* unwind the ones we already registered */
2001         hidinput_disconnect(hid);
2002
2003         return -1;
2004 }
2005 EXPORT_SYMBOL_GPL(hidinput_connect);
2006
2007 void hidinput_disconnect(struct hid_device *hid)
2008 {
2009         struct hid_input *hidinput, *next;
2010
2011         hidinput_cleanup_battery(hid);
2012
2013         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2014                 list_del(&hidinput->list);
2015                 if (hidinput->registered)
2016                         input_unregister_device(hidinput->input);
2017                 else
2018                         input_free_device(hidinput->input);
2019                 kfree(hidinput->name);
2020                 kfree(hidinput);
2021         }
2022
2023         /* led_work is spawned by input_dev callbacks, but doesn't access the
2024          * parent input_dev at all. Once all input devices are removed, we
2025          * know that led_work will never get restarted, so we can cancel it
2026          * synchronously and are safe. */
2027         cancel_work_sync(&hid->led_work);
2028 }
2029 EXPORT_SYMBOL_GPL(hidinput_disconnect);