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         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
 330           HID_BATTERY_QUIRK_IGNORE },
 331         {}
 332 };
 333
 334 static unsigned find_battery_quirk(struct hid_device *hdev)
 335 {
 336         unsigned quirks = 0;
 337         const struct hid_device_id *match;
 338
 339         match = hid_match_id(hdev, hid_battery_quirks);
 340         if (match != NULL)
 341                 quirks = match->driver_data;
 342
 343         return quirks;
 344 }
 345
 346 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 347                                            int value)
 348 {
 349         if (dev->battery_min < dev->battery_max &&
 350             value >= dev->battery_min && value <= dev->battery_max)
 351                 value = ((value - dev->battery_min) * 100) /
 352                         (dev->battery_max - dev->battery_min);
 353
 354         return value;
 355 }
 356
 357 static int hidinput_query_battery_capacity(struct hid_device *dev)
 358 {
 359         u8 *buf;
 360         int ret;
 361
 362         buf = kmalloc(4, GFP_KERNEL);
 363         if (!buf)
 364                 return -ENOMEM;
 365
 366         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 367                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 368         if (ret < 2) {
 369                 kfree(buf);
 370                 return -ENODATA;
 371         }
 372
 373         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 374         kfree(buf);
 375         return ret;
 376 }
 377
 378 static int hidinput_get_battery_property(struct power_supply *psy,
 379                                          enum power_supply_property prop,
 380                                          union power_supply_propval *val)
 381 {
 382         struct hid_device *dev = power_supply_get_drvdata(psy);
 383         int value;
 384         int ret = 0;
 385
 386         switch (prop) {
 387         case POWER_SUPPLY_PROP_PRESENT:
 388         case POWER_SUPPLY_PROP_ONLINE:
 389                 val->intval = 1;
 390                 break;
 391
 392         case POWER_SUPPLY_PROP_CAPACITY:
 393                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 394                     !dev->battery_avoid_query) {
 395                         value = hidinput_query_battery_capacity(dev);
 396                         if (value < 0)
 397                                 return value;
 398                 } else  {
 399                         value = dev->battery_capacity;
 400                 }
 401
 402                 val->intval = value;
 403                 break;
 404
 405         case POWER_SUPPLY_PROP_MODEL_NAME:
 406                 val->strval = dev->name;
 407                 break;
 408
 409         case POWER_SUPPLY_PROP_STATUS:
 410                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 411                     !dev->battery_avoid_query) {
 412                         value = hidinput_query_battery_capacity(dev);
 413                         if (value < 0)
 414                                 return value;
 415
 416                         dev->battery_capacity = value;
 417                         dev->battery_status = HID_BATTERY_QUERIED;
 418                 }
 419
 420                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 421                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 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, struct hid_field *field)
 439 {
 440         struct power_supply_desc *psy_desc;
 441         struct power_supply_config psy_cfg = { .drv_data = dev, };
 442         unsigned quirks;
 443         s32 min, max;
 444         int error;
 445
 446         if (dev->battery)
 447                 return 0;       /* already initialized? */
 448
 449         quirks = find_battery_quirk(dev);
 450
 451         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 452                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 453
 454         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 455                 return 0;
 456
 457         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 458         if (!psy_desc)
 459                 return -ENOMEM;
 460
 461         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 462                                    strlen(dev->uniq) ?
 463                                         dev->uniq : dev_name(&dev->dev));
 464         if (!psy_desc->name) {
 465                 error = -ENOMEM;
 466                 goto err_free_mem;
 467         }
 468
 469         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 470         psy_desc->properties = hidinput_battery_props;
 471         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 472         psy_desc->use_for_apm = 0;
 473         psy_desc->get_property = hidinput_get_battery_property;
 474
 475         min = field->logical_minimum;
 476         max = field->logical_maximum;
 477
 478         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 479                 min = 0;
 480                 max = 100;
 481         }
 482
 483         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 484                 report_type = HID_FEATURE_REPORT;
 485
 486         dev->battery_min = min;
 487         dev->battery_max = max;
 488         dev->battery_report_type = report_type;
 489         dev->battery_report_id = field->report->id;
 490
 491         /*
 492          * Stylus is normally not connected to the device and thus we
 493          * can't query the device and get meaningful battery strength.
 494          * We have to wait for the device to report it on its own.
 495          */
 496         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 497                                    field->physical == HID_DG_STYLUS;
 498
 499         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 500         if (IS_ERR(dev->battery)) {
 501                 error = PTR_ERR(dev->battery);
 502                 hid_warn(dev, "can't register power supply: %d\n", error);
 503                 goto err_free_name;
 504         }
 505
 506         power_supply_powers(dev->battery, &dev->dev);
 507         return 0;
 508
 509 err_free_name:
 510         kfree(psy_desc->name);
 511 err_free_mem:
 512         kfree(psy_desc);
 513         dev->battery = NULL;
 514         return error;
 515 }
 516
 517 static void hidinput_cleanup_battery(struct hid_device *dev)
 518 {
 519         const struct power_supply_desc *psy_desc;
 520
 521         if (!dev->battery)
 522                 return;
 523
 524         psy_desc = dev->battery->desc;
 525         power_supply_unregister(dev->battery);
 526         kfree(psy_desc->name);
 527         kfree(psy_desc);
 528         dev->battery = NULL;
 529 }
 530
 531 static void hidinput_update_battery(struct hid_device *dev, int value)
 532 {
 533         int capacity;
 534
 535         if (!dev->battery)
 536                 return;
 537
 538         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 539                 return;
 540
 541         capacity = hidinput_scale_battery_capacity(dev, value);
 542
 543         if (dev->battery_status != HID_BATTERY_REPORTED ||
 544             capacity != dev->battery_capacity) {
 545                 dev->battery_capacity = capacity;
 546                 dev->battery_status = HID_BATTERY_REPORTED;
 547                 power_supply_changed(dev->battery);
 548         }
 549 }
 550 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 551 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 552                                   struct hid_field *field)
 553 {
 554         return 0;
 555 }
 556
 557 static void hidinput_cleanup_battery(struct hid_device *dev)
 558 {
 559 }
 560
 561 static void hidinput_update_battery(struct hid_device *dev, int value)
 562 {
 563 }
 564 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 565
 566 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 567                                      struct hid_usage *usage)
 568 {
 569         struct input_dev *input = hidinput->input;
 570         struct hid_device *device = input_get_drvdata(input);
 571         int max = 0, code;
 572         unsigned long *bit = NULL;
 573
 574         field->hidinput = hidinput;
 575
 576         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 577                 goto ignore;
 578
 579         /* Ignore if report count is out of bounds. */
 580         if (field->report_count < 1)
 581                 goto ignore;
 582
 583         /* only LED usages are supported in output fields */
 584         if (field->report_type == HID_OUTPUT_REPORT &&
 585                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 586                 goto ignore;
 587         }
 588
 589         if (device->driver->input_mapping) {
 590                 int ret = device->driver->input_mapping(device, hidinput, field,
 591                                 usage, &bit, &max);
 592                 if (ret > 0)
 593                         goto mapped;
 594                 if (ret < 0)
 595                         goto ignore;
 596         }
 597
 598         switch (usage->hid & HID_USAGE_PAGE) {
 599         case HID_UP_UNDEFINED:
 600                 goto ignore;
 601
 602         case HID_UP_KEYBOARD:
 603                 set_bit(EV_REP, input->evbit);
 604
 605                 if ((usage->hid & HID_USAGE) < 256) {
 606                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 607                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 608                 } else
 609                         map_key(KEY_UNKNOWN);
 610
 611                 break;
 612
 613         case HID_UP_BUTTON:
 614                 code = ((usage->hid - 1) & HID_USAGE);
 615
 616                 switch (field->application) {
 617                 case HID_GD_MOUSE:
 618                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 619                 case HID_GD_JOYSTICK:
 620                                 if (code <= 0xf)
 621                                         code += BTN_JOYSTICK;
 622                                 else
 623                                         code += BTN_TRIGGER_HAPPY - 0x10;
 624                                 break;
 625                 case HID_GD_GAMEPAD:
 626                                 if (code <= 0xf)
 627                                         code += BTN_GAMEPAD;
 628                                 else
 629                                         code += BTN_TRIGGER_HAPPY - 0x10;
 630                                 break;
 631                 default:
 632                         switch (field->physical) {
 633                         case HID_GD_MOUSE:
 634                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 635                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 636                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 637                         default:              code += BTN_MISC;
 638                         }
 639                 }
 640
 641                 map_key(code);
 642                 break;
 643
 644         case HID_UP_SIMULATION:
 645                 switch (usage->hid & 0xffff) {
 646                 case 0xba: map_abs(ABS_RUDDER);   break;
 647                 case 0xbb: map_abs(ABS_THROTTLE); break;
 648                 case 0xc4: map_abs(ABS_GAS);      break;
 649                 case 0xc5: map_abs(ABS_BRAKE);    break;
 650                 case 0xc8: map_abs(ABS_WHEEL);    break;
 651                 default:   goto ignore;
 652                 }
 653                 break;
 654
 655         case HID_UP_GENDESK:
 656                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 657                         switch (usage->hid & 0xf) {
 658                         case 0x1: map_key_clear(KEY_POWER);  break;
 659                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 660                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 661                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 662                         case 0x5: map_key_clear(KEY_MENU); break;
 663                         case 0x6: map_key_clear(KEY_PROG1); break;
 664                         case 0x7: map_key_clear(KEY_HELP); break;
 665                         case 0x8: map_key_clear(KEY_EXIT); break;
 666                         case 0x9: map_key_clear(KEY_SELECT); break;
 667                         case 0xa: map_key_clear(KEY_RIGHT); break;
 668                         case 0xb: map_key_clear(KEY_LEFT); break;
 669                         case 0xc: map_key_clear(KEY_UP); break;
 670                         case 0xd: map_key_clear(KEY_DOWN); break;
 671                         case 0xe: map_key_clear(KEY_POWER2); break;
 672                         case 0xf: map_key_clear(KEY_RESTART); break;
 673                         default: goto unknown;
 674                         }
 675                         break;
 676                 }
 677
 678                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 679                         switch (usage->hid & 0xf) {
 680                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 681                         default: goto ignore;
 682                         }
 683                         break;
 684                 }
 685
 686                 /*
 687                  * Some lazy vendors declare 255 usages for System Control,
 688                  * leading to the creation of ABS_X|Y axis and too many others.
 689                  * It wouldn't be a problem if joydev doesn't consider the
 690                  * device as a joystick then.
 691                  */
 692                 if (field->application == HID_GD_SYSTEM_CONTROL)
 693                         goto ignore;
 694
 695                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 696                         switch (usage->hid) {
 697                         case HID_GD_UP:    usage->hat_dir = 1; break;
 698                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 699                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 700                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 701                         default: goto unknown;
 702                         }
 703                         if (field->dpad) {
 704                                 map_abs(field->dpad);
 705                                 goto ignore;
 706                         }
 707                         map_abs(ABS_HAT0X);
 708                         break;
 709                 }
 710
 711                 switch (usage->hid) {
 712                 /* These usage IDs map directly to the usage codes. */
 713                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 714                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 715                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 716                                 map_rel(usage->hid & 0xf);
 717                         else
 718                                 map_abs_clear(usage->hid & 0xf);
 719                         break;
 720
 721                 case HID_GD_WHEEL:
 722                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 723                                 set_bit(REL_WHEEL, input->relbit);
 724                                 map_rel(REL_WHEEL_HI_RES);
 725                         } else {
 726                                 map_abs(usage->hid & 0xf);
 727                         }
 728                         break;
 729                 case HID_GD_SLIDER: case HID_GD_DIAL:
 730                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 731                                 map_rel(usage->hid & 0xf);
 732                         else
 733                                 map_abs(usage->hid & 0xf);
 734                         break;
 735
 736                 case HID_GD_HATSWITCH:
 737                         usage->hat_min = field->logical_minimum;
 738                         usage->hat_max = field->logical_maximum;
 739                         map_abs(ABS_HAT0X);
 740                         break;
 741
 742                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 743                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 744
 745                 case HID_GD_RFKILL_BTN:
 746                         /* MS wireless radio ctl extension, also check CA */
 747                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 748                                 map_key_clear(KEY_RFKILL);
 749                                 /* We need to simulate the btn release */
 750                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 751                                 break;
 752                         }
 753
 754                 default: goto unknown;
 755                 }
 756
 757                 break;
 758
 759         case HID_UP_LED:
 760                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 761                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 762                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 763                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 764                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 765                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 766                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 767                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 768                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 769                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 770                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 771                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 772
 773                 default: goto ignore;
 774                 }
 775                 break;
 776
 777         case HID_UP_DIGITIZER:
 778                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 779                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 780                 else if ((field->application & 0xff) == 0x02) /* Pen */
 781                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 782
 783                 switch (usage->hid & 0xff) {
 784                 case 0x00: /* Undefined */
 785                         goto ignore;
 786
 787                 case 0x30: /* TipPressure */
 788                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 789                                 device->quirks |= HID_QUIRK_NOTOUCH;
 790                                 set_bit(EV_KEY, input->evbit);
 791                                 set_bit(BTN_TOUCH, input->keybit);
 792                         }
 793                         map_abs_clear(ABS_PRESSURE);
 794                         break;
 795
 796                 case 0x32: /* InRange */
 797                         switch (field->physical & 0xff) {
 798                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 799                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 800                         default: map_key(BTN_TOOL_PEN); break;
 801                         }
 802                         break;
 803
 804                 case 0x3b: /* Battery Strength */
 805                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 806                         usage->type = EV_PWR;
 807                         return;
 808
 809                 case 0x3c: /* Invert */
 810                         map_key_clear(BTN_TOOL_RUBBER);
 811                         break;
 812
 813                 case 0x3d: /* X Tilt */
 814                         map_abs_clear(ABS_TILT_X);
 815                         break;
 816
 817                 case 0x3e: /* Y Tilt */
 818                         map_abs_clear(ABS_TILT_Y);
 819                         break;
 820
 821                 case 0x33: /* Touch */
 822                 case 0x42: /* TipSwitch */
 823                 case 0x43: /* TipSwitch2 */
 824                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 825                         map_key_clear(BTN_TOUCH);
 826                         break;
 827
 828                 case 0x44: /* BarrelSwitch */
 829                         map_key_clear(BTN_STYLUS);
 830                         break;
 831
 832                 case 0x45: /* ERASER */
 833                         /*
 834                          * This event is reported when eraser tip touches the surface.
 835                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 836                          * tool gets in proximity.
 837                          */
 838                         map_key_clear(BTN_TOUCH);
 839                         break;
 840
 841                 case 0x46: /* TabletPick */
 842                 case 0x5a: /* SecondaryBarrelSwitch */
 843                         map_key_clear(BTN_STYLUS2);
 844                         break;
 845
 846                 case 0x5b: /* TransducerSerialNumber */
 847                         usage->type = EV_MSC;
 848                         usage->code = MSC_SERIAL;
 849                         bit = input->mscbit;
 850                         max = MSC_MAX;
 851                         break;
 852
 853                 default:  goto unknown;
 854                 }
 855                 break;
 856
 857         case HID_UP_TELEPHONY:
 858                 switch (usage->hid & HID_USAGE) {
 859                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 860                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 861                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 862                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 863                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 864                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 865                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 866                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 867                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 868                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 869                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 870                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 871                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 872                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 873                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 874                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 875                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 876                 default: goto ignore;
 877                 }
 878                 break;
 879
 880         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 881                 switch (usage->hid & HID_USAGE) {
 882                 case 0x000: goto ignore;
 883                 case 0x030: map_key_clear(KEY_POWER);           break;
 884                 case 0x031: map_key_clear(KEY_RESTART);         break;
 885                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 886                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 887                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 888                 case 0x036: map_key_clear(BTN_MISC);            break;
 889
 890                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 891                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 892                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 893                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 894                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 895                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 896                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 897                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 898                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 899
 900                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 901                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 902                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 903                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 904                 case 0x069: map_key_clear(KEY_RED);             break;
 905                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 906                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 907                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 908                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 909
 910                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 911                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 912                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 913                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 914                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 915                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 916
 917                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 918                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 919                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 920
 921                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 922                 case 0x083: map_key_clear(KEY_LAST);            break;
 923                 case 0x084: map_key_clear(KEY_ENTER);           break;
 924                 case 0x088: map_key_clear(KEY_PC);              break;
 925                 case 0x089: map_key_clear(KEY_TV);              break;
 926                 case 0x08a: map_key_clear(KEY_WWW);             break;
 927                 case 0x08b: map_key_clear(KEY_DVD);             break;
 928                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 929                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 930                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 931                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 932                 case 0x090: map_key_clear(KEY_MEMO);            break;
 933                 case 0x091: map_key_clear(KEY_CD);              break;
 934                 case 0x092: map_key_clear(KEY_VCR);             break;
 935                 case 0x093: map_key_clear(KEY_TUNER);           break;
 936                 case 0x094: map_key_clear(KEY_EXIT);            break;
 937                 case 0x095: map_key_clear(KEY_HELP);            break;
 938                 case 0x096: map_key_clear(KEY_TAPE);            break;
 939                 case 0x097: map_key_clear(KEY_TV2);             break;
 940                 case 0x098: map_key_clear(KEY_SAT);             break;
 941                 case 0x09a: map_key_clear(KEY_PVR);             break;
 942
 943                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 944                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 945                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 946
 947                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 948                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 949                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 950                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 951                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 952                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 953                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 954                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 955                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 956                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 957                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 958                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 959
 960                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 961                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 962
 963                 case 0x0d8: map_key_clear(KEY_DICTATE);         break;
 964                 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);    break;
 965
 966                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 967                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 968                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 969                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 970                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 971                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 972
 973                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 974                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 975                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 976                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 977                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 978                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 979                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 980                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 981                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 982                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 983                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 984                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 985                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 986                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 987                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 988                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 989                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 990                 case 0x192: map_key_clear(KEY_CALC);            break;
 991                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 992                 case 0x194: map_key_clear(KEY_FILE);            break;
 993                 case 0x196: map_key_clear(KEY_WWW);             break;
 994                 case 0x199: map_key_clear(KEY_CHAT);            break;
 995                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 996                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 997                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 998                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 999                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1000                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1001                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1002                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1003                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1004                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1005                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1006                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1007                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1008                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1009                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1010                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1011                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1012                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1013                 case 0x201: map_key_clear(KEY_NEW);             break;
1014                 case 0x202: map_key_clear(KEY_OPEN);            break;
1015                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1016                 case 0x204: map_key_clear(KEY_EXIT);            break;
1017                 case 0x207: map_key_clear(KEY_SAVE);            break;
1018                 case 0x208: map_key_clear(KEY_PRINT);           break;
1019                 case 0x209: map_key_clear(KEY_PROPS);           break;
1020                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1021                 case 0x21b: map_key_clear(KEY_COPY);            break;
1022                 case 0x21c: map_key_clear(KEY_CUT);             break;
1023                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1024                 case 0x21f: map_key_clear(KEY_FIND);            break;
1025                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1026                 case 0x222: map_key_clear(KEY_GOTO);            break;
1027                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1028                 case 0x224: map_key_clear(KEY_BACK);            break;
1029                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1030                 case 0x226: map_key_clear(KEY_STOP);            break;
1031                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1032                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1033                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1034                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1035                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1036                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1037                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1038                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1039                 case 0x238: /* AC Pan */
1040                         set_bit(REL_HWHEEL, input->relbit);
1041                         map_rel(REL_HWHEEL_HI_RES);
1042                         break;
1043                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1044                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1045                 case 0x269: map_key_clear(KEY_INSERT);          break;
1046                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1047                 case 0x279: map_key_clear(KEY_REDO);            break;
1048
1049                 case 0x289: map_key_clear(KEY_REPLY);           break;
1050                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1051                 case 0x28c: map_key_clear(KEY_SEND);            break;
1052
1053                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1054
1055                 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1056
1057                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1058                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1059                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1060                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1061                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1062                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1063
1064                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1065
1066                 default: map_key_clear(KEY_UNKNOWN);
1067                 }
1068                 break;
1069
1070         case HID_UP_GENDEVCTRLS:
1071                 switch (usage->hid) {
1072                 case HID_DC_BATTERYSTRENGTH:
1073                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1074                         usage->type = EV_PWR;
1075                         return;
1076                 }
1077                 goto unknown;
1078
1079         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1080                 set_bit(EV_REP, input->evbit);
1081                 switch (usage->hid & HID_USAGE) {
1082                 case 0x021: map_key_clear(KEY_PRINT);           break;
1083                 case 0x070: map_key_clear(KEY_HP);              break;
1084                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1085                 case 0x072: map_key_clear(KEY_SOUND);           break;
1086                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1087                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1088                 case 0x081: map_key_clear(KEY_CHAT);            break;
1089                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1090                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1091                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1092                 case 0x085: map_key_clear(KEY_SPORT);           break;
1093                 case 0x086: map_key_clear(KEY_SHOP);            break;
1094                 default:    goto ignore;
1095                 }
1096                 break;
1097
1098         case HID_UP_HPVENDOR2:
1099                 set_bit(EV_REP, input->evbit);
1100                 switch (usage->hid & HID_USAGE) {
1101                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1102                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1103                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1104                 default:    goto ignore;
1105                 }
1106                 break;
1107
1108         case HID_UP_MSVENDOR:
1109                 goto ignore;
1110
1111         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1112                 set_bit(EV_REP, input->evbit);
1113                 goto ignore;
1114
1115         case HID_UP_LOGIVENDOR:
1116                 /* intentional fallback */
1117         case HID_UP_LOGIVENDOR2:
1118                 /* intentional fallback */
1119         case HID_UP_LOGIVENDOR3:
1120                 goto ignore;
1121
1122         case HID_UP_PID:
1123                 switch (usage->hid & HID_USAGE) {
1124                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1125                 default: goto ignore;
1126                 }
1127                 break;
1128
1129         default:
1130         unknown:
1131                 if (field->report_size == 1) {
1132                         if (field->report->type == HID_OUTPUT_REPORT) {
1133                                 map_led(LED_MISC);
1134                                 break;
1135                         }
1136                         map_key(BTN_MISC);
1137                         break;
1138                 }
1139                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1140                         map_rel(REL_MISC);
1141                         break;
1142                 }
1143                 map_abs(ABS_MISC);
1144                 break;
1145         }
1146
1147 mapped:
1148         /* Mapping failed, bail out */
1149         if (!bit)
1150                 return;
1151
1152         if (device->driver->input_mapped &&
1153             device->driver->input_mapped(device, hidinput, field, usage,
1154                                          &bit, &max) < 0) {
1155                 /*
1156                  * The driver indicated that no further generic handling
1157                  * of the usage is desired.
1158                  */
1159                 return;
1160         }
1161
1162         set_bit(usage->type, input->evbit);
1163
1164         /*
1165          * This part is *really* controversial:
1166          * - HID aims at being generic so we should do our best to export
1167          *   all incoming events
1168          * - HID describes what events are, so there is no reason for ABS_X
1169          *   to be mapped to ABS_Y
1170          * - HID is using *_MISC+N as a default value, but nothing prevents
1171          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1172          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1173          *   processing)
1174          *
1175          * If devices still want to use this (at their own risk), they will
1176          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1177          * the default should be a reliable mapping.
1178          */
1179         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1180                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1181                         usage->code = find_next_zero_bit(bit,
1182                                                          max + 1,
1183                                                          usage->code);
1184                 } else {
1185                         device->status |= HID_STAT_DUP_DETECTED;
1186                         goto ignore;
1187                 }
1188         }
1189
1190         if (usage->code > max)
1191                 goto ignore;
1192
1193         if (usage->type == EV_ABS) {
1194
1195                 int a = field->logical_minimum;
1196                 int b = field->logical_maximum;
1197
1198                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1199                         a = field->logical_minimum = 0;
1200                         b = field->logical_maximum = 255;
1201                 }
1202
1203                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1204                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1205                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1206
1207                 input_abs_set_res(input, usage->code,
1208                                   hidinput_calc_abs_res(field, usage->code));
1209
1210                 /* use a larger default input buffer for MT devices */
1211                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1212                         input_set_events_per_packet(input, 60);
1213         }
1214
1215         if (usage->type == EV_ABS &&
1216             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1217                 int i;
1218                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1219                         input_set_abs_params(input, i, -1, 1, 0, 0);
1220                         set_bit(i, input->absbit);
1221                 }
1222                 if (usage->hat_dir && !field->dpad)
1223                         field->dpad = usage->code;
1224         }
1225
1226         /* for those devices which produce Consumer volume usage as relative,
1227          * we emulate pressing volumeup/volumedown appropriate number of times
1228          * in hidinput_hid_event()
1229          */
1230         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1231                         (usage->code == ABS_VOLUME)) {
1232                 set_bit(KEY_VOLUMEUP, input->keybit);
1233                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1234         }
1235
1236         if (usage->type == EV_KEY) {
1237                 set_bit(EV_MSC, input->evbit);
1238                 set_bit(MSC_SCAN, input->mscbit);
1239         }
1240
1241         return;
1242
1243 ignore:
1244         usage->type = 0;
1245         usage->code = 0;
1246 }
1247
1248 static void hidinput_handle_scroll(struct hid_usage *usage,
1249                                    struct input_dev *input,
1250                                    __s32 value)
1251 {
1252         int code;
1253         int hi_res, lo_res;
1254
1255         if (value == 0)
1256                 return;
1257
1258         if (usage->code == REL_WHEEL_HI_RES)
1259                 code = REL_WHEEL;
1260         else
1261                 code = REL_HWHEEL;
1262
1263         /*
1264          * Windows reports one wheel click as value 120. Where a high-res
1265          * scroll wheel is present, a fraction of 120 is reported instead.
1266          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1267          * adhere to the 120 expectation.
1268          */
1269         hi_res = value * 120/usage->resolution_multiplier;
1270
1271         usage->wheel_accumulated += hi_res;
1272         lo_res = usage->wheel_accumulated/120;
1273         if (lo_res)
1274                 usage->wheel_accumulated -= lo_res * 120;
1275
1276         input_event(input, EV_REL, code, lo_res);
1277         input_event(input, EV_REL, usage->code, hi_res);
1278 }
1279
1280 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1281 {
1282         struct input_dev *input;
1283         unsigned *quirks = &hid->quirks;
1284
1285         if (!usage->type)
1286                 return;
1287
1288         if (usage->type == EV_PWR) {
1289                 hidinput_update_battery(hid, value);
1290                 return;
1291         }
1292
1293         if (!field->hidinput)
1294                 return;
1295
1296         input = field->hidinput->input;
1297
1298         if (usage->type == EV_ABS &&
1299             (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1300              ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
1301                 value = field->logical_maximum - value;
1302         }
1303
1304         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1305                 int hat_dir = usage->hat_dir;
1306                 if (!hat_dir)
1307                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1308                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1309                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1310                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1311                 return;
1312         }
1313
1314         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1315                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1316                 return;
1317         }
1318
1319         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1320                 if (value) {
1321                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1322                         return;
1323                 }
1324                 input_event(input, usage->type, usage->code, 0);
1325                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1326                 return;
1327         }
1328
1329         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1330                 int a = field->logical_minimum;
1331                 int b = field->logical_maximum;
1332                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1333         }
1334
1335         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1336                 dbg_hid("Maximum Effects - %d\n",value);
1337                 return;
1338         }
1339
1340         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1341                 dbg_hid("PID Pool Report\n");
1342                 return;
1343         }
1344
1345         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1346                 return;
1347
1348         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1349                                         usage->code == REL_HWHEEL_HI_RES)) {
1350                 hidinput_handle_scroll(usage, input, value);
1351                 return;
1352         }
1353
1354         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1355                         (usage->code == ABS_VOLUME)) {
1356                 int count = abs(value);
1357                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1358                 int i;
1359
1360                 for (i = 0; i < count; i++) {
1361                         input_event(input, EV_KEY, direction, 1);
1362                         input_sync(input);
1363                         input_event(input, EV_KEY, direction, 0);
1364                         input_sync(input);
1365                 }
1366                 return;
1367         }
1368
1369         /*
1370          * Ignore out-of-range values as per HID specification,
1371          * section 5.10 and 6.2.25, when NULL state bit is present.
1372          * When it's not, clamp the value to match Microsoft's input
1373          * driver as mentioned in "Required HID usages for digitizers":
1374          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1375          *
1376          * The logical_minimum < logical_maximum check is done so that we
1377          * don't unintentionally discard values sent by devices which
1378          * don't specify logical min and max.
1379          */
1380         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1381             (field->logical_minimum < field->logical_maximum)) {
1382                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1383                     (value < field->logical_minimum ||
1384                      value > field->logical_maximum)) {
1385                         dbg_hid("Ignoring out-of-range value %x\n", value);
1386                         return;
1387                 }
1388                 value = clamp(value,
1389                               field->logical_minimum,
1390                               field->logical_maximum);
1391         }
1392
1393         /*
1394          * Ignore reports for absolute data if the data didn't change. This is
1395          * not only an optimization but also fixes 'dead' key reports. Some
1396          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1397          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1398          * can only have one of them physically available. The 'dead' keys
1399          * report constant 0. As all map to the same keycode, they'd confuse
1400          * the input layer. If we filter the 'dead' keys on the HID level, we
1401          * skip the keycode translation and only forward real events.
1402          */
1403         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1404                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1405                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1406             usage->usage_index < field->maxusage &&
1407             value == field->value[usage->usage_index])
1408                 return;
1409
1410         /* report the usage code as scancode if the key status has changed */
1411         if (usage->type == EV_KEY &&
1412             (!test_bit(usage->code, input->key)) == value)
1413                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1414
1415         input_event(input, usage->type, usage->code, value);
1416
1417         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1418             usage->type == EV_KEY && value) {
1419                 input_sync(input);
1420                 input_event(input, usage->type, usage->code, 0);
1421         }
1422 }
1423
1424 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1425 {
1426         struct hid_input *hidinput;
1427
1428         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1429                 return;
1430
1431         list_for_each_entry(hidinput, &hid->inputs, list)
1432                 input_sync(hidinput->input);
1433 }
1434 EXPORT_SYMBOL_GPL(hidinput_report_event);
1435
1436 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1437 {
1438         struct hid_report *report;
1439         int i, j;
1440
1441         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1442                 for (i = 0; i < report->maxfield; i++) {
1443                         *field = report->field[i];
1444                         for (j = 0; j < (*field)->maxusage; j++)
1445                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1446                                         return j;
1447                 }
1448         }
1449         return -1;
1450 }
1451 EXPORT_SYMBOL_GPL(hidinput_find_field);
1452
1453 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1454 {
1455         struct hid_report *report;
1456         struct hid_field *field;
1457         int i, j;
1458
1459         list_for_each_entry(report,
1460                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1461                             list) {
1462                 for (i = 0; i < report->maxfield; i++) {
1463                         field = report->field[i];
1464                         for (j = 0; j < field->maxusage; j++)
1465                                 if (field->usage[j].type == EV_LED)
1466                                         return field;
1467                 }
1468         }
1469         return NULL;
1470 }
1471 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1472
1473 unsigned int hidinput_count_leds(struct hid_device *hid)
1474 {
1475         struct hid_report *report;
1476         struct hid_field *field;
1477         int i, j;
1478         unsigned int count = 0;
1479
1480         list_for_each_entry(report,
1481                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1482                             list) {
1483                 for (i = 0; i < report->maxfield; i++) {
1484                         field = report->field[i];
1485                         for (j = 0; j < field->maxusage; j++)
1486                                 if (field->usage[j].type == EV_LED &&
1487                                     field->value[j])
1488                                         count += 1;
1489                 }
1490         }
1491         return count;
1492 }
1493 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1494
1495 static void hidinput_led_worker(struct work_struct *work)
1496 {
1497         struct hid_device *hid = container_of(work, struct hid_device,
1498                                               led_work);
1499         struct hid_field *field;
1500         struct hid_report *report;
1501         int ret;
1502         u32 len;
1503         __u8 *buf;
1504
1505         field = hidinput_get_led_field(hid);
1506         if (!field)
1507                 return;
1508
1509         /*
1510          * field->report is accessed unlocked regarding HID core. So there might
1511          * be another incoming SET-LED request from user-space, which changes
1512          * the LED state while we assemble our outgoing buffer. However, this
1513          * doesn't matter as hid_output_report() correctly converts it into a
1514          * boolean value no matter what information is currently set on the LED
1515          * field (even garbage). So the remote device will always get a valid
1516          * request.
1517          * And in case we send a wrong value, a next led worker is spawned
1518          * for every SET-LED request so the following worker will send the
1519          * correct value, guaranteed!
1520          */
1521
1522         report = field->report;
1523
1524         /* use custom SET_REPORT request if possible (asynchronous) */
1525         if (hid->ll_driver->request)
1526                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1527
1528         /* fall back to generic raw-output-report */
1529         len = hid_report_len(report);
1530         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1531         if (!buf)
1532                 return;
1533
1534         hid_output_report(report, buf);
1535         /* synchronous output report */
1536         ret = hid_hw_output_report(hid, buf, len);
1537         if (ret == -ENOSYS)
1538                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1539                                 HID_REQ_SET_REPORT);
1540         kfree(buf);
1541 }
1542
1543 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1544                                 unsigned int code, int value)
1545 {
1546         struct hid_device *hid = input_get_drvdata(dev);
1547         struct hid_field *field;
1548         int offset;
1549
1550         if (type == EV_FF)
1551                 return input_ff_event(dev, type, code, value);
1552
1553         if (type != EV_LED)
1554                 return -1;
1555
1556         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1557                 hid_warn(dev, "event field not found\n");
1558                 return -1;
1559         }
1560
1561         hid_set_field(field, offset, value);
1562
1563         schedule_work(&hid->led_work);
1564         return 0;
1565 }
1566
1567 static int hidinput_open(struct input_dev *dev)
1568 {
1569         struct hid_device *hid = input_get_drvdata(dev);
1570
1571         return hid_hw_open(hid);
1572 }
1573
1574 static void hidinput_close(struct input_dev *dev)
1575 {
1576         struct hid_device *hid = input_get_drvdata(dev);
1577
1578         hid_hw_close(hid);
1579 }
1580
1581 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1582                 struct hid_report *report, bool use_logical_max)
1583 {
1584         struct hid_usage *usage;
1585         bool update_needed = false;
1586         bool get_report_completed = false;
1587         int i, j;
1588
1589         if (report->maxfield == 0)
1590                 return false;
1591
1592         for (i = 0; i < report->maxfield; i++) {
1593                 __s32 value = use_logical_max ?
1594                               report->field[i]->logical_maximum :
1595                               report->field[i]->logical_minimum;
1596
1597                 /* There is no good reason for a Resolution
1598                  * Multiplier to have a count other than 1.
1599                  * Ignore that case.
1600                  */
1601                 if (report->field[i]->report_count != 1)
1602                         continue;
1603
1604                 for (j = 0; j < report->field[i]->maxusage; j++) {
1605                         usage = &report->field[i]->usage[j];
1606
1607                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1608                                 continue;
1609
1610                         /*
1611                          * If we have more than one feature within this
1612                          * report we need to fill in the bits from the
1613                          * others before we can overwrite the ones for the
1614                          * Resolution Multiplier.
1615                          *
1616                          * But if we're not allowed to read from the device,
1617                          * we just bail. Such a device should not exist
1618                          * anyway.
1619                          */
1620                         if (!get_report_completed && report->maxfield > 1) {
1621                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1622                                         return update_needed;
1623
1624                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1625                                 hid_hw_wait(hid);
1626                                 get_report_completed = true;
1627                         }
1628
1629                         report->field[i]->value[j] = value;
1630                         update_needed = true;
1631                 }
1632         }
1633
1634         return update_needed;
1635 }
1636
1637 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1638 {
1639         struct hid_report_enum *rep_enum;
1640         struct hid_report *rep;
1641         int ret;
1642
1643         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1644         list_for_each_entry(rep, &rep_enum->report_list, list) {
1645                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1646                                                                      rep, true);
1647
1648                 if (update_needed) {
1649                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1650                         if (ret) {
1651                                 __hidinput_change_resolution_multipliers(hid,
1652                                                                     rep, false);
1653                                 return;
1654                         }
1655                 }
1656         }
1657
1658         /* refresh our structs */
1659         hid_setup_resolution_multiplier(hid);
1660 }
1661
1662 static void report_features(struct hid_device *hid)
1663 {
1664         struct hid_driver *drv = hid->driver;
1665         struct hid_report_enum *rep_enum;
1666         struct hid_report *rep;
1667         struct hid_usage *usage;
1668         int i, j;
1669
1670         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1671         list_for_each_entry(rep, &rep_enum->report_list, list)
1672                 for (i = 0; i < rep->maxfield; i++) {
1673                         /* Ignore if report count is out of bounds. */
1674                         if (rep->field[i]->report_count < 1)
1675                                 continue;
1676
1677                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1678                                 usage = &rep->field[i]->usage[j];
1679
1680                                 /* Verify if Battery Strength feature is available */
1681                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1682                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1683                                                                rep->field[i]);
1684
1685                                 if (drv->feature_mapping)
1686                                         drv->feature_mapping(hid, rep->field[i], usage);
1687                         }
1688                 }
1689 }
1690
1691 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1692                                            unsigned int application)
1693 {
1694         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1695         struct input_dev *input_dev = input_allocate_device();
1696         const char *suffix = NULL;
1697         size_t suffix_len, name_len;
1698
1699         if (!hidinput || !input_dev)
1700                 goto fail;
1701
1702         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1703             hid->maxapplication > 1) {
1704                 switch (application) {
1705                 case HID_GD_KEYBOARD:
1706                         suffix = "Keyboard";
1707                         break;
1708                 case HID_GD_KEYPAD:
1709                         suffix = "Keypad";
1710                         break;
1711                 case HID_GD_MOUSE:
1712                         suffix = "Mouse";
1713                         break;
1714                 case HID_DG_STYLUS:
1715                         suffix = "Pen";
1716                         break;
1717                 case HID_DG_TOUCHSCREEN:
1718                         suffix = "Touchscreen";
1719                         break;
1720                 case HID_DG_TOUCHPAD:
1721                         suffix = "Touchpad";
1722                         break;
1723                 case HID_GD_SYSTEM_CONTROL:
1724                         suffix = "System Control";
1725                         break;
1726                 case HID_CP_CONSUMER_CONTROL:
1727                         suffix = "Consumer Control";
1728                         break;
1729                 case HID_GD_WIRELESS_RADIO_CTLS:
1730                         suffix = "Wireless Radio Control";
1731                         break;
1732                 case HID_GD_SYSTEM_MULTIAXIS:
1733                         suffix = "System Multi Axis";
1734                         break;
1735                 default:
1736                         break;
1737                 }
1738         }
1739
1740         if (suffix) {
1741                 name_len = strlen(hid->name);
1742                 suffix_len = strlen(suffix);
1743                 if ((name_len < suffix_len) ||
1744                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1745                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1746                                                    hid->name, suffix);
1747                         if (!hidinput->name)
1748                                 goto fail;
1749                 }
1750         }
1751
1752         input_set_drvdata(input_dev, hid);
1753         input_dev->event = hidinput_input_event;
1754         input_dev->open = hidinput_open;
1755         input_dev->close = hidinput_close;
1756         input_dev->setkeycode = hidinput_setkeycode;
1757         input_dev->getkeycode = hidinput_getkeycode;
1758
1759         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1760         input_dev->phys = hid->phys;
1761         input_dev->uniq = hid->uniq;
1762         input_dev->id.bustype = hid->bus;
1763         input_dev->id.vendor  = hid->vendor;
1764         input_dev->id.product = hid->product;
1765         input_dev->id.version = hid->version;
1766         input_dev->dev.parent = &hid->dev;
1767
1768         hidinput->input = input_dev;
1769         hidinput->application = application;
1770         list_add_tail(&hidinput->list, &hid->inputs);
1771
1772         INIT_LIST_HEAD(&hidinput->reports);
1773
1774         return hidinput;
1775
1776 fail:
1777         kfree(hidinput);
1778         input_free_device(input_dev);
1779         hid_err(hid, "Out of memory during hid input probe\n");
1780         return NULL;
1781 }
1782
1783 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1784 {
1785         int i;
1786         unsigned long r = 0;
1787
1788         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1789                 r |= hidinput->input->evbit[i];
1790
1791         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1792                 r |= hidinput->input->keybit[i];
1793
1794         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1795                 r |= hidinput->input->relbit[i];
1796
1797         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1798                 r |= hidinput->input->absbit[i];
1799
1800         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1801                 r |= hidinput->input->mscbit[i];
1802
1803         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1804                 r |= hidinput->input->ledbit[i];
1805
1806         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1807                 r |= hidinput->input->sndbit[i];
1808
1809         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1810                 r |= hidinput->input->ffbit[i];
1811
1812         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1813                 r |= hidinput->input->swbit[i];
1814
1815         return !!r;
1816 }
1817
1818 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1819                 struct hid_input *hidinput)
1820 {
1821         struct hid_report *report;
1822         int i, k;
1823
1824         list_del(&hidinput->list);
1825         input_free_device(hidinput->input);
1826         kfree(hidinput->name);
1827
1828         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1829                 if (k == HID_OUTPUT_REPORT &&
1830                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1831                         continue;
1832
1833                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1834                                     list) {
1835
1836                         for (i = 0; i < report->maxfield; i++)
1837                                 if (report->field[i]->hidinput == hidinput)
1838                                         report->field[i]->hidinput = NULL;
1839                 }
1840         }
1841
1842         kfree(hidinput);
1843 }
1844
1845 static struct hid_input *hidinput_match(struct hid_report *report)
1846 {
1847         struct hid_device *hid = report->device;
1848         struct hid_input *hidinput;
1849
1850         list_for_each_entry(hidinput, &hid->inputs, list) {
1851                 if (hidinput->report &&
1852                     hidinput->report->id == report->id)
1853                         return hidinput;
1854         }
1855
1856         return NULL;
1857 }
1858
1859 static struct hid_input *hidinput_match_application(struct hid_report *report)
1860 {
1861         struct hid_device *hid = report->device;
1862         struct hid_input *hidinput;
1863
1864         list_for_each_entry(hidinput, &hid->inputs, list) {
1865                 if (hidinput->application == report->application)
1866                         return hidinput;
1867         }
1868
1869         return NULL;
1870 }
1871
1872 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1873                                              struct hid_report *report)
1874 {
1875         int i, j;
1876
1877         for (i = 0; i < report->maxfield; i++)
1878                 for (j = 0; j < report->field[i]->maxusage; j++)
1879                         hidinput_configure_usage(hidinput, report->field[i],
1880                                                  report->field[i]->usage + j);
1881 }
1882
1883 /*
1884  * Register the input device; print a message.
1885  * Configure the input layer interface
1886  * Read all reports and initialize the absolute field values.
1887  */
1888
1889 int hidinput_connect(struct hid_device *hid, unsigned int force)
1890 {
1891         struct hid_driver *drv = hid->driver;
1892         struct hid_report *report;
1893         struct hid_input *next, *hidinput = NULL;
1894         unsigned int application;
1895         int i, k;
1896
1897         INIT_LIST_HEAD(&hid->inputs);
1898         INIT_WORK(&hid->led_work, hidinput_led_worker);
1899
1900         hid->status &= ~HID_STAT_DUP_DETECTED;
1901
1902         if (!force) {
1903                 for (i = 0; i < hid->maxcollection; i++) {
1904                         struct hid_collection *col = &hid->collection[i];
1905                         if (col->type == HID_COLLECTION_APPLICATION ||
1906                                         col->type == HID_COLLECTION_PHYSICAL)
1907                                 if (IS_INPUT_APPLICATION(col->usage))
1908                                         break;
1909                 }
1910
1911                 if (i == hid->maxcollection)
1912                         return -1;
1913         }
1914
1915         report_features(hid);
1916
1917         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1918                 if (k == HID_OUTPUT_REPORT &&
1919                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1920                         continue;
1921
1922                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1923
1924                         if (!report->maxfield)
1925                                 continue;
1926
1927                         application = report->application;
1928
1929                         /*
1930                          * Find the previous hidinput report attached
1931                          * to this report id.
1932                          */
1933                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1934                                 hidinput = hidinput_match(report);
1935                         else if (hid->maxapplication > 1 &&
1936                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1937                                 hidinput = hidinput_match_application(report);
1938
1939                         if (!hidinput) {
1940                                 hidinput = hidinput_allocate(hid, application);
1941                                 if (!hidinput)
1942                                         goto out_unwind;
1943                         }
1944
1945                         hidinput_configure_usages(hidinput, report);
1946
1947                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1948                                 hidinput->report = report;
1949
1950                         list_add_tail(&report->hidinput_list,
1951                                       &hidinput->reports);
1952                 }
1953         }
1954
1955         hidinput_change_resolution_multipliers(hid);
1956
1957         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1958                 if (drv->input_configured &&
1959                     drv->input_configured(hid, hidinput))
1960                         goto out_unwind;
1961
1962                 if (!hidinput_has_been_populated(hidinput)) {
1963                         /* no need to register an input device not populated */
1964                         hidinput_cleanup_hidinput(hid, hidinput);
1965                         continue;
1966                 }
1967
1968                 if (input_register_device(hidinput->input))
1969                         goto out_unwind;
1970                 hidinput->registered = true;
1971         }
1972
1973         if (list_empty(&hid->inputs)) {
1974                 hid_err(hid, "No inputs registered, leaving\n");
1975                 goto out_unwind;
1976         }
1977
1978         if (hid->status & HID_STAT_DUP_DETECTED)
1979                 hid_dbg(hid,
1980                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1981
1982         return 0;
1983
1984 out_unwind:
1985         /* unwind the ones we already registered */
1986         hidinput_disconnect(hid);
1987
1988         return -1;
1989 }
1990 EXPORT_SYMBOL_GPL(hidinput_connect);
1991
1992 void hidinput_disconnect(struct hid_device *hid)
1993 {
1994         struct hid_input *hidinput, *next;
1995
1996         hidinput_cleanup_battery(hid);
1997
1998         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1999                 list_del(&hidinput->list);
2000                 if (hidinput->registered)
2001                         input_unregister_device(hidinput->input);
2002                 else
2003                         input_free_device(hidinput->input);
2004                 kfree(hidinput->name);
2005                 kfree(hidinput);
2006         }
2007
2008         /* led_work is spawned by input_dev callbacks, but doesn't access the
2009          * parent input_dev at all. Once all input devices are removed, we
2010          * know that led_work will never get restarted, so we can cancel it
2011          * synchronously and are safe. */
2012         cancel_work_sync(&hid->led_work);
2013 }
2014 EXPORT_SYMBOL_GPL(hidinput_disconnect);