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         {}
 328 };
 329
 330 static unsigned find_battery_quirk(struct hid_device *hdev)
 331 {
 332         unsigned quirks = 0;
 333         const struct hid_device_id *match;
 334
 335         match = hid_match_id(hdev, hid_battery_quirks);
 336         if (match != NULL)
 337                 quirks = match->driver_data;
 338
 339         return quirks;
 340 }
 341
 342 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 343                                            int value)
 344 {
 345         if (dev->battery_min < dev->battery_max &&
 346             value >= dev->battery_min && value <= dev->battery_max)
 347                 value = ((value - dev->battery_min) * 100) /
 348                         (dev->battery_max - dev->battery_min);
 349
 350         return value;
 351 }
 352
 353 static int hidinput_query_battery_capacity(struct hid_device *dev)
 354 {
 355         u8 *buf;
 356         int ret;
 357
 358         buf = kmalloc(4, GFP_KERNEL);
 359         if (!buf)
 360                 return -ENOMEM;
 361
 362         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 363                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 364         if (ret < 2) {
 365                 kfree(buf);
 366                 return -ENODATA;
 367         }
 368
 369         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 370         kfree(buf);
 371         return ret;
 372 }
 373
 374 static int hidinput_get_battery_property(struct power_supply *psy,
 375                                          enum power_supply_property prop,
 376                                          union power_supply_propval *val)
 377 {
 378         struct hid_device *dev = power_supply_get_drvdata(psy);
 379         int value;
 380         int ret = 0;
 381
 382         switch (prop) {
 383         case POWER_SUPPLY_PROP_PRESENT:
 384         case POWER_SUPPLY_PROP_ONLINE:
 385                 val->intval = 1;
 386                 break;
 387
 388         case POWER_SUPPLY_PROP_CAPACITY:
 389                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 390                     !dev->battery_avoid_query) {
 391                         value = hidinput_query_battery_capacity(dev);
 392                         if (value < 0)
 393                                 return value;
 394                 } else  {
 395                         value = dev->battery_capacity;
 396                 }
 397
 398                 val->intval = value;
 399                 break;
 400
 401         case POWER_SUPPLY_PROP_MODEL_NAME:
 402                 val->strval = dev->name;
 403                 break;
 404
 405         case POWER_SUPPLY_PROP_STATUS:
 406                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 407                     !dev->battery_avoid_query) {
 408                         value = hidinput_query_battery_capacity(dev);
 409                         if (value < 0)
 410                                 return value;
 411
 412                         dev->battery_capacity = value;
 413                         dev->battery_status = HID_BATTERY_QUERIED;
 414                 }
 415
 416                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 417                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 418                 else
 419                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 420                 break;
 421
 422         case POWER_SUPPLY_PROP_SCOPE:
 423                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 424                 break;
 425
 426         default:
 427                 ret = -EINVAL;
 428                 break;
 429         }
 430
 431         return ret;
 432 }
 433
 434 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 435 {
 436         struct power_supply_desc *psy_desc;
 437         struct power_supply_config psy_cfg = { .drv_data = dev, };
 438         unsigned quirks;
 439         s32 min, max;
 440         int error;
 441
 442         if (dev->battery)
 443                 return 0;       /* already initialized? */
 444
 445         quirks = find_battery_quirk(dev);
 446
 447         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 448                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 449
 450         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 451                 return 0;
 452
 453         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 454         if (!psy_desc)
 455                 return -ENOMEM;
 456
 457         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 458                                    strlen(dev->uniq) ?
 459                                         dev->uniq : dev_name(&dev->dev));
 460         if (!psy_desc->name) {
 461                 error = -ENOMEM;
 462                 goto err_free_mem;
 463         }
 464
 465         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 466         psy_desc->properties = hidinput_battery_props;
 467         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 468         psy_desc->use_for_apm = 0;
 469         psy_desc->get_property = hidinput_get_battery_property;
 470
 471         min = field->logical_minimum;
 472         max = field->logical_maximum;
 473
 474         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 475                 min = 0;
 476                 max = 100;
 477         }
 478
 479         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 480                 report_type = HID_FEATURE_REPORT;
 481
 482         dev->battery_min = min;
 483         dev->battery_max = max;
 484         dev->battery_report_type = report_type;
 485         dev->battery_report_id = field->report->id;
 486
 487         /*
 488          * Stylus is normally not connected to the device and thus we
 489          * can't query the device and get meaningful battery strength.
 490          * We have to wait for the device to report it on its own.
 491          */
 492         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 493                                    field->physical == HID_DG_STYLUS;
 494
 495         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 496         if (IS_ERR(dev->battery)) {
 497                 error = PTR_ERR(dev->battery);
 498                 hid_warn(dev, "can't register power supply: %d\n", error);
 499                 goto err_free_name;
 500         }
 501
 502         power_supply_powers(dev->battery, &dev->dev);
 503         return 0;
 504
 505 err_free_name:
 506         kfree(psy_desc->name);
 507 err_free_mem:
 508         kfree(psy_desc);
 509         dev->battery = NULL;
 510         return error;
 511 }
 512
 513 static void hidinput_cleanup_battery(struct hid_device *dev)
 514 {
 515         const struct power_supply_desc *psy_desc;
 516
 517         if (!dev->battery)
 518                 return;
 519
 520         psy_desc = dev->battery->desc;
 521         power_supply_unregister(dev->battery);
 522         kfree(psy_desc->name);
 523         kfree(psy_desc);
 524         dev->battery = NULL;
 525 }
 526
 527 static void hidinput_update_battery(struct hid_device *dev, int value)
 528 {
 529         int capacity;
 530
 531         if (!dev->battery)
 532                 return;
 533
 534         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 535                 return;
 536
 537         capacity = hidinput_scale_battery_capacity(dev, value);
 538
 539         if (dev->battery_status != HID_BATTERY_REPORTED ||
 540             capacity != dev->battery_capacity) {
 541                 dev->battery_capacity = capacity;
 542                 dev->battery_status = HID_BATTERY_REPORTED;
 543                 power_supply_changed(dev->battery);
 544         }
 545 }
 546 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 547 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 548                                   struct hid_field *field)
 549 {
 550         return 0;
 551 }
 552
 553 static void hidinput_cleanup_battery(struct hid_device *dev)
 554 {
 555 }
 556
 557 static void hidinput_update_battery(struct hid_device *dev, int value)
 558 {
 559 }
 560 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 561
 562 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 563                                      struct hid_usage *usage)
 564 {
 565         struct input_dev *input = hidinput->input;
 566         struct hid_device *device = input_get_drvdata(input);
 567         int max = 0, code;
 568         unsigned long *bit = NULL;
 569
 570         field->hidinput = hidinput;
 571
 572         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 573                 goto ignore;
 574
 575         /* Ignore if report count is out of bounds. */
 576         if (field->report_count < 1)
 577                 goto ignore;
 578
 579         /* only LED usages are supported in output fields */
 580         if (field->report_type == HID_OUTPUT_REPORT &&
 581                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 582                 goto ignore;
 583         }
 584
 585         if (device->driver->input_mapping) {
 586                 int ret = device->driver->input_mapping(device, hidinput, field,
 587                                 usage, &bit, &max);
 588                 if (ret > 0)
 589                         goto mapped;
 590                 if (ret < 0)
 591                         goto ignore;
 592         }
 593
 594         switch (usage->hid & HID_USAGE_PAGE) {
 595         case HID_UP_UNDEFINED:
 596                 goto ignore;
 597
 598         case HID_UP_KEYBOARD:
 599                 set_bit(EV_REP, input->evbit);
 600
 601                 if ((usage->hid & HID_USAGE) < 256) {
 602                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 603                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 604                 } else
 605                         map_key(KEY_UNKNOWN);
 606
 607                 break;
 608
 609         case HID_UP_BUTTON:
 610                 code = ((usage->hid - 1) & HID_USAGE);
 611
 612                 switch (field->application) {
 613                 case HID_GD_MOUSE:
 614                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 615                 case HID_GD_JOYSTICK:
 616                                 if (code <= 0xf)
 617                                         code += BTN_JOYSTICK;
 618                                 else
 619                                         code += BTN_TRIGGER_HAPPY - 0x10;
 620                                 break;
 621                 case HID_GD_GAMEPAD:
 622                                 if (code <= 0xf)
 623                                         code += BTN_GAMEPAD;
 624                                 else
 625                                         code += BTN_TRIGGER_HAPPY - 0x10;
 626                                 break;
 627                 default:
 628                         switch (field->physical) {
 629                         case HID_GD_MOUSE:
 630                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 631                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 632                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 633                         default:              code += BTN_MISC;
 634                         }
 635                 }
 636
 637                 map_key(code);
 638                 break;
 639
 640         case HID_UP_SIMULATION:
 641                 switch (usage->hid & 0xffff) {
 642                 case 0xba: map_abs(ABS_RUDDER);   break;
 643                 case 0xbb: map_abs(ABS_THROTTLE); break;
 644                 case 0xc4: map_abs(ABS_GAS);      break;
 645                 case 0xc5: map_abs(ABS_BRAKE);    break;
 646                 case 0xc8: map_abs(ABS_WHEEL);    break;
 647                 default:   goto ignore;
 648                 }
 649                 break;
 650
 651         case HID_UP_GENDESK:
 652                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 653                         switch (usage->hid & 0xf) {
 654                         case 0x1: map_key_clear(KEY_POWER);  break;
 655                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 656                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 657                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 658                         case 0x5: map_key_clear(KEY_MENU); break;
 659                         case 0x6: map_key_clear(KEY_PROG1); break;
 660                         case 0x7: map_key_clear(KEY_HELP); break;
 661                         case 0x8: map_key_clear(KEY_EXIT); break;
 662                         case 0x9: map_key_clear(KEY_SELECT); break;
 663                         case 0xa: map_key_clear(KEY_RIGHT); break;
 664                         case 0xb: map_key_clear(KEY_LEFT); break;
 665                         case 0xc: map_key_clear(KEY_UP); break;
 666                         case 0xd: map_key_clear(KEY_DOWN); break;
 667                         case 0xe: map_key_clear(KEY_POWER2); break;
 668                         case 0xf: map_key_clear(KEY_RESTART); break;
 669                         default: goto unknown;
 670                         }
 671                         break;
 672                 }
 673
 674                 if ((usage->hid & 0xf0) == 0xa0) {      /* SystemControl */
 675                         switch (usage->hid & 0xf) {
 676                         case 0x9: map_key_clear(KEY_MICMUTE); break;
 677                         default: goto ignore;
 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
 758                 default: goto unknown;
 759                 }
 760
 761                 break;
 762
 763         case HID_UP_LED:
 764                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 765                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 766                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 767                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 768                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 769                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 770                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 771                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 772                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 773                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 774                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 775                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 776
 777                 default: goto ignore;
 778                 }
 779                 break;
 780
 781         case HID_UP_DIGITIZER:
 782                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 783                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 784                 else if ((field->application & 0xff) == 0x02) /* Pen */
 785                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 786
 787                 switch (usage->hid & 0xff) {
 788                 case 0x00: /* Undefined */
 789                         goto ignore;
 790
 791                 case 0x30: /* TipPressure */
 792                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 793                                 device->quirks |= HID_QUIRK_NOTOUCH;
 794                                 set_bit(EV_KEY, input->evbit);
 795                                 set_bit(BTN_TOUCH, input->keybit);
 796                         }
 797                         map_abs_clear(ABS_PRESSURE);
 798                         break;
 799
 800                 case 0x32: /* InRange */
 801                         switch (field->physical & 0xff) {
 802                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 803                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 804                         default: map_key(BTN_TOOL_PEN); break;
 805                         }
 806                         break;
 807
 808                 case 0x3b: /* Battery Strength */
 809                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 810                         usage->type = EV_PWR;
 811                         return;
 812
 813                 case 0x3c: /* Invert */
 814                         map_key_clear(BTN_TOOL_RUBBER);
 815                         break;
 816
 817                 case 0x3d: /* X Tilt */
 818                         map_abs_clear(ABS_TILT_X);
 819                         break;
 820
 821                 case 0x3e: /* Y Tilt */
 822                         map_abs_clear(ABS_TILT_Y);
 823                         break;
 824
 825                 case 0x33: /* Touch */
 826                 case 0x42: /* TipSwitch */
 827                 case 0x43: /* TipSwitch2 */
 828                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 829                         map_key_clear(BTN_TOUCH);
 830                         break;
 831
 832                 case 0x44: /* BarrelSwitch */
 833                         map_key_clear(BTN_STYLUS);
 834                         break;
 835
 836                 case 0x45: /* ERASER */
 837                         /*
 838                          * This event is reported when eraser tip touches the surface.
 839                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 840                          * tool gets in proximity.
 841                          */
 842                         map_key_clear(BTN_TOUCH);
 843                         break;
 844
 845                 case 0x46: /* TabletPick */
 846                 case 0x5a: /* SecondaryBarrelSwitch */
 847                         map_key_clear(BTN_STYLUS2);
 848                         break;
 849
 850                 case 0x5b: /* TransducerSerialNumber */
 851                         usage->type = EV_MSC;
 852                         usage->code = MSC_SERIAL;
 853                         bit = input->mscbit;
 854                         max = MSC_MAX;
 855                         break;
 856
 857                 default:  goto unknown;
 858                 }
 859                 break;
 860
 861         case HID_UP_TELEPHONY:
 862                 switch (usage->hid & HID_USAGE) {
 863                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 864                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 865                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 866                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 867                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 868                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 869                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 870                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 871                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 872                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 873                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 874                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 875                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 876                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 877                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 878                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 879                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 880                 default: goto ignore;
 881                 }
 882                 break;
 883
 884         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 885                 switch (usage->hid & HID_USAGE) {
 886                 case 0x000: goto ignore;
 887                 case 0x030: map_key_clear(KEY_POWER);           break;
 888                 case 0x031: map_key_clear(KEY_RESTART);         break;
 889                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 890                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 891                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 892                 case 0x036: map_key_clear(BTN_MISC);            break;
 893
 894                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 895                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 896                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 897                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 898                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 899                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 900                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 901                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 902                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 903
 904                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 905                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 906                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 907                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 908                 case 0x069: map_key_clear(KEY_RED);             break;
 909                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 910                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 911                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 912                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 913
 914                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 915                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 916                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 917                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 918                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 919                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 920
 921                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 922                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 923                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 924
 925                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 926                 case 0x083: map_key_clear(KEY_LAST);            break;
 927                 case 0x084: map_key_clear(KEY_ENTER);           break;
 928                 case 0x088: map_key_clear(KEY_PC);              break;
 929                 case 0x089: map_key_clear(KEY_TV);              break;
 930                 case 0x08a: map_key_clear(KEY_WWW);             break;
 931                 case 0x08b: map_key_clear(KEY_DVD);             break;
 932                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 933                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 934                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 935                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 936                 case 0x090: map_key_clear(KEY_MEMO);            break;
 937                 case 0x091: map_key_clear(KEY_CD);              break;
 938                 case 0x092: map_key_clear(KEY_VCR);             break;
 939                 case 0x093: map_key_clear(KEY_TUNER);           break;
 940                 case 0x094: map_key_clear(KEY_EXIT);            break;
 941                 case 0x095: map_key_clear(KEY_HELP);            break;
 942                 case 0x096: map_key_clear(KEY_TAPE);            break;
 943                 case 0x097: map_key_clear(KEY_TV2);             break;
 944                 case 0x098: map_key_clear(KEY_SAT);             break;
 945                 case 0x09a: map_key_clear(KEY_PVR);             break;
 946
 947                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 948                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 949                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 950
 951                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 952                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 953                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 954                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 955                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 956                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 957                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 958                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 959                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 960                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 961                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 962                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 963
 964                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 965                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 966
 967                 case 0x0d8: map_key_clear(KEY_DICTATE);         break;
 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 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1060
1061                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1062                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1063                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1064                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1065                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1066                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1067
1068                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1069
1070                 default: map_key_clear(KEY_UNKNOWN);
1071                 }
1072                 break;
1073
1074         case HID_UP_GENDEVCTRLS:
1075                 switch (usage->hid) {
1076                 case HID_DC_BATTERYSTRENGTH:
1077                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1078                         usage->type = EV_PWR;
1079                         return;
1080                 }
1081                 goto unknown;
1082
1083         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1084                 set_bit(EV_REP, input->evbit);
1085                 switch (usage->hid & HID_USAGE) {
1086                 case 0x021: map_key_clear(KEY_PRINT);           break;
1087                 case 0x070: map_key_clear(KEY_HP);              break;
1088                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1089                 case 0x072: map_key_clear(KEY_SOUND);           break;
1090                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1091                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1092                 case 0x081: map_key_clear(KEY_CHAT);            break;
1093                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1094                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1095                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1096                 case 0x085: map_key_clear(KEY_SPORT);           break;
1097                 case 0x086: map_key_clear(KEY_SHOP);            break;
1098                 default:    goto ignore;
1099                 }
1100                 break;
1101
1102         case HID_UP_HPVENDOR2:
1103                 set_bit(EV_REP, input->evbit);
1104                 switch (usage->hid & HID_USAGE) {
1105                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1106                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1107                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1108                 default:    goto ignore;
1109                 }
1110                 break;
1111
1112         case HID_UP_MSVENDOR:
1113                 goto ignore;
1114
1115         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1116                 set_bit(EV_REP, input->evbit);
1117                 goto ignore;
1118
1119         case HID_UP_LOGIVENDOR:
1120                 /* intentional fallback */
1121         case HID_UP_LOGIVENDOR2:
1122                 /* intentional fallback */
1123         case HID_UP_LOGIVENDOR3:
1124                 goto ignore;
1125
1126         case HID_UP_PID:
1127                 switch (usage->hid & HID_USAGE) {
1128                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1129                 default: goto ignore;
1130                 }
1131                 break;
1132
1133         default:
1134         unknown:
1135                 if (field->report_size == 1) {
1136                         if (field->report->type == HID_OUTPUT_REPORT) {
1137                                 map_led(LED_MISC);
1138                                 break;
1139                         }
1140                         map_key(BTN_MISC);
1141                         break;
1142                 }
1143                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1144                         map_rel(REL_MISC);
1145                         break;
1146                 }
1147                 map_abs(ABS_MISC);
1148                 break;
1149         }
1150
1151 mapped:
1152         /* Mapping failed, bail out */
1153         if (!bit)
1154                 return;
1155
1156         if (device->driver->input_mapped &&
1157             device->driver->input_mapped(device, hidinput, field, usage,
1158                                          &bit, &max) < 0) {
1159                 /*
1160                  * The driver indicated that no further generic handling
1161                  * of the usage is desired.
1162                  */
1163                 return;
1164         }
1165
1166         set_bit(usage->type, input->evbit);
1167
1168         /*
1169          * This part is *really* controversial:
1170          * - HID aims at being generic so we should do our best to export
1171          *   all incoming events
1172          * - HID describes what events are, so there is no reason for ABS_X
1173          *   to be mapped to ABS_Y
1174          * - HID is using *_MISC+N as a default value, but nothing prevents
1175          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1176          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1177          *   processing)
1178          *
1179          * If devices still want to use this (at their own risk), they will
1180          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1181          * the default should be a reliable mapping.
1182          */
1183         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1184                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1185                         usage->code = find_next_zero_bit(bit,
1186                                                          max + 1,
1187                                                          usage->code);
1188                 } else {
1189                         device->status |= HID_STAT_DUP_DETECTED;
1190                         goto ignore;
1191                 }
1192         }
1193
1194         if (usage->code > max)
1195                 goto ignore;
1196
1197         if (usage->type == EV_ABS) {
1198
1199                 int a = field->logical_minimum;
1200                 int b = field->logical_maximum;
1201
1202                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1203                         a = field->logical_minimum = 0;
1204                         b = field->logical_maximum = 255;
1205                 }
1206
1207                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1208                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1209                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1210
1211                 input_abs_set_res(input, usage->code,
1212                                   hidinput_calc_abs_res(field, usage->code));
1213
1214                 /* use a larger default input buffer for MT devices */
1215                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1216                         input_set_events_per_packet(input, 60);
1217         }
1218
1219         if (usage->type == EV_ABS &&
1220             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1221                 int i;
1222                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1223                         input_set_abs_params(input, i, -1, 1, 0, 0);
1224                         set_bit(i, input->absbit);
1225                 }
1226                 if (usage->hat_dir && !field->dpad)
1227                         field->dpad = usage->code;
1228         }
1229
1230         /* for those devices which produce Consumer volume usage as relative,
1231          * we emulate pressing volumeup/volumedown appropriate number of times
1232          * in hidinput_hid_event()
1233          */
1234         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1235                         (usage->code == ABS_VOLUME)) {
1236                 set_bit(KEY_VOLUMEUP, input->keybit);
1237                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1238         }
1239
1240         if (usage->type == EV_KEY) {
1241                 set_bit(EV_MSC, input->evbit);
1242                 set_bit(MSC_SCAN, input->mscbit);
1243         }
1244
1245         return;
1246
1247 ignore:
1248         usage->type = 0;
1249         usage->code = 0;
1250 }
1251
1252 static void hidinput_handle_scroll(struct hid_usage *usage,
1253                                    struct input_dev *input,
1254                                    __s32 value)
1255 {
1256         int code;
1257         int hi_res, lo_res;
1258
1259         if (value == 0)
1260                 return;
1261
1262         if (usage->code == REL_WHEEL_HI_RES)
1263                 code = REL_WHEEL;
1264         else
1265                 code = REL_HWHEEL;
1266
1267         /*
1268          * Windows reports one wheel click as value 120. Where a high-res
1269          * scroll wheel is present, a fraction of 120 is reported instead.
1270          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1271          * adhere to the 120 expectation.
1272          */
1273         hi_res = value * 120/usage->resolution_multiplier;
1274
1275         usage->wheel_accumulated += hi_res;
1276         lo_res = usage->wheel_accumulated/120;
1277         if (lo_res)
1278                 usage->wheel_accumulated -= lo_res * 120;
1279
1280         input_event(input, EV_REL, code, lo_res);
1281         input_event(input, EV_REL, usage->code, hi_res);
1282 }
1283
1284 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1285 {
1286         struct input_dev *input;
1287         unsigned *quirks = &hid->quirks;
1288
1289         if (!usage->type)
1290                 return;
1291
1292         if (usage->type == EV_PWR) {
1293                 hidinput_update_battery(hid, value);
1294                 return;
1295         }
1296
1297         if (!field->hidinput)
1298                 return;
1299
1300         input = field->hidinput->input;
1301
1302         if (usage->type == EV_ABS &&
1303             (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1304              ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
1305                 value = field->logical_maximum - value;
1306         }
1307
1308         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1309                 int hat_dir = usage->hat_dir;
1310                 if (!hat_dir)
1311                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1312                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1313                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1314                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1315                 return;
1316         }
1317
1318         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1319                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1320                 return;
1321         }
1322
1323         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1324                 if (value) {
1325                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1326                         return;
1327                 }
1328                 input_event(input, usage->type, usage->code, 0);
1329                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1330                 return;
1331         }
1332
1333         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1334                 int a = field->logical_minimum;
1335                 int b = field->logical_maximum;
1336                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1337         }
1338
1339         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1340                 dbg_hid("Maximum Effects - %d\n",value);
1341                 return;
1342         }
1343
1344         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1345                 dbg_hid("PID Pool Report\n");
1346                 return;
1347         }
1348
1349         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1350                 return;
1351
1352         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1353                                         usage->code == REL_HWHEEL_HI_RES)) {
1354                 hidinput_handle_scroll(usage, input, value);
1355                 return;
1356         }
1357
1358         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1359                         (usage->code == ABS_VOLUME)) {
1360                 int count = abs(value);
1361                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1362                 int i;
1363
1364                 for (i = 0; i < count; i++) {
1365                         input_event(input, EV_KEY, direction, 1);
1366                         input_sync(input);
1367                         input_event(input, EV_KEY, direction, 0);
1368                         input_sync(input);
1369                 }
1370                 return;
1371         }
1372
1373         /*
1374          * Ignore out-of-range values as per HID specification,
1375          * section 5.10 and 6.2.25, when NULL state bit is present.
1376          * When it's not, clamp the value to match Microsoft's input
1377          * driver as mentioned in "Required HID usages for digitizers":
1378          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1379          *
1380          * The logical_minimum < logical_maximum check is done so that we
1381          * don't unintentionally discard values sent by devices which
1382          * don't specify logical min and max.
1383          */
1384         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1385             (field->logical_minimum < field->logical_maximum)) {
1386                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1387                     (value < field->logical_minimum ||
1388                      value > field->logical_maximum)) {
1389                         dbg_hid("Ignoring out-of-range value %x\n", value);
1390                         return;
1391                 }
1392                 value = clamp(value,
1393                               field->logical_minimum,
1394                               field->logical_maximum);
1395         }
1396
1397         /*
1398          * Ignore reports for absolute data if the data didn't change. This is
1399          * not only an optimization but also fixes 'dead' key reports. Some
1400          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1401          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1402          * can only have one of them physically available. The 'dead' keys
1403          * report constant 0. As all map to the same keycode, they'd confuse
1404          * the input layer. If we filter the 'dead' keys on the HID level, we
1405          * skip the keycode translation and only forward real events.
1406          */
1407         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1408                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1409                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1410             usage->usage_index < field->maxusage &&
1411             value == field->value[usage->usage_index])
1412                 return;
1413
1414         /* report the usage code as scancode if the key status has changed */
1415         if (usage->type == EV_KEY &&
1416             (!test_bit(usage->code, input->key)) == value)
1417                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1418
1419         input_event(input, usage->type, usage->code, value);
1420
1421         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1422             usage->type == EV_KEY && value) {
1423                 input_sync(input);
1424                 input_event(input, usage->type, usage->code, 0);
1425         }
1426 }
1427
1428 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1429 {
1430         struct hid_input *hidinput;
1431
1432         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1433                 return;
1434
1435         list_for_each_entry(hidinput, &hid->inputs, list)
1436                 input_sync(hidinput->input);
1437 }
1438 EXPORT_SYMBOL_GPL(hidinput_report_event);
1439
1440 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1441 {
1442         struct hid_report *report;
1443         int i, j;
1444
1445         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1446                 for (i = 0; i < report->maxfield; i++) {
1447                         *field = report->field[i];
1448                         for (j = 0; j < (*field)->maxusage; j++)
1449                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1450                                         return j;
1451                 }
1452         }
1453         return -1;
1454 }
1455 EXPORT_SYMBOL_GPL(hidinput_find_field);
1456
1457 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1458 {
1459         struct hid_report *report;
1460         struct hid_field *field;
1461         int i, j;
1462
1463         list_for_each_entry(report,
1464                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1465                             list) {
1466                 for (i = 0; i < report->maxfield; i++) {
1467                         field = report->field[i];
1468                         for (j = 0; j < field->maxusage; j++)
1469                                 if (field->usage[j].type == EV_LED)
1470                                         return field;
1471                 }
1472         }
1473         return NULL;
1474 }
1475 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1476
1477 unsigned int hidinput_count_leds(struct hid_device *hid)
1478 {
1479         struct hid_report *report;
1480         struct hid_field *field;
1481         int i, j;
1482         unsigned int count = 0;
1483
1484         list_for_each_entry(report,
1485                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1486                             list) {
1487                 for (i = 0; i < report->maxfield; i++) {
1488                         field = report->field[i];
1489                         for (j = 0; j < field->maxusage; j++)
1490                                 if (field->usage[j].type == EV_LED &&
1491                                     field->value[j])
1492                                         count += 1;
1493                 }
1494         }
1495         return count;
1496 }
1497 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1498
1499 static void hidinput_led_worker(struct work_struct *work)
1500 {
1501         struct hid_device *hid = container_of(work, struct hid_device,
1502                                               led_work);
1503         struct hid_field *field;
1504         struct hid_report *report;
1505         int ret;
1506         u32 len;
1507         __u8 *buf;
1508
1509         field = hidinput_get_led_field(hid);
1510         if (!field)
1511                 return;
1512
1513         /*
1514          * field->report is accessed unlocked regarding HID core. So there might
1515          * be another incoming SET-LED request from user-space, which changes
1516          * the LED state while we assemble our outgoing buffer. However, this
1517          * doesn't matter as hid_output_report() correctly converts it into a
1518          * boolean value no matter what information is currently set on the LED
1519          * field (even garbage). So the remote device will always get a valid
1520          * request.
1521          * And in case we send a wrong value, a next led worker is spawned
1522          * for every SET-LED request so the following worker will send the
1523          * correct value, guaranteed!
1524          */
1525
1526         report = field->report;
1527
1528         /* use custom SET_REPORT request if possible (asynchronous) */
1529         if (hid->ll_driver->request)
1530                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1531
1532         /* fall back to generic raw-output-report */
1533         len = hid_report_len(report);
1534         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1535         if (!buf)
1536                 return;
1537
1538         hid_output_report(report, buf);
1539         /* synchronous output report */
1540         ret = hid_hw_output_report(hid, buf, len);
1541         if (ret == -ENOSYS)
1542                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1543                                 HID_REQ_SET_REPORT);
1544         kfree(buf);
1545 }
1546
1547 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1548                                 unsigned int code, int value)
1549 {
1550         struct hid_device *hid = input_get_drvdata(dev);
1551         struct hid_field *field;
1552         int offset;
1553
1554         if (type == EV_FF)
1555                 return input_ff_event(dev, type, code, value);
1556
1557         if (type != EV_LED)
1558                 return -1;
1559
1560         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1561                 hid_warn(dev, "event field not found\n");
1562                 return -1;
1563         }
1564
1565         hid_set_field(field, offset, value);
1566
1567         schedule_work(&hid->led_work);
1568         return 0;
1569 }
1570
1571 static int hidinput_open(struct input_dev *dev)
1572 {
1573         struct hid_device *hid = input_get_drvdata(dev);
1574
1575         return hid_hw_open(hid);
1576 }
1577
1578 static void hidinput_close(struct input_dev *dev)
1579 {
1580         struct hid_device *hid = input_get_drvdata(dev);
1581
1582         hid_hw_close(hid);
1583 }
1584
1585 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1586                 struct hid_report *report, bool use_logical_max)
1587 {
1588         struct hid_usage *usage;
1589         bool update_needed = false;
1590         int i, j;
1591
1592         if (report->maxfield == 0)
1593                 return false;
1594
1595         /*
1596          * If we have more than one feature within this report we
1597          * need to fill in the bits from the others before we can
1598          * overwrite the ones for the Resolution Multiplier.
1599          */
1600         if (report->maxfield > 1) {
1601                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1602                 hid_hw_wait(hid);
1603         }
1604
1605         for (i = 0; i < report->maxfield; i++) {
1606                 __s32 value = use_logical_max ?
1607                               report->field[i]->logical_maximum :
1608                               report->field[i]->logical_minimum;
1609
1610                 /* There is no good reason for a Resolution
1611                  * Multiplier to have a count other than 1.
1612                  * Ignore that case.
1613                  */
1614                 if (report->field[i]->report_count != 1)
1615                         continue;
1616
1617                 for (j = 0; j < report->field[i]->maxusage; j++) {
1618                         usage = &report->field[i]->usage[j];
1619
1620                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1621                                 continue;
1622
1623                         report->field[i]->value[j] = value;
1624                         update_needed = true;
1625                 }
1626         }
1627
1628         return update_needed;
1629 }
1630
1631 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1632 {
1633         struct hid_report_enum *rep_enum;
1634         struct hid_report *rep;
1635         int ret;
1636
1637         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1638         list_for_each_entry(rep, &rep_enum->report_list, list) {
1639                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1640                                                                      rep, true);
1641
1642                 if (update_needed) {
1643                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1644                         if (ret) {
1645                                 __hidinput_change_resolution_multipliers(hid,
1646                                                                     rep, false);
1647                                 return;
1648                         }
1649                 }
1650         }
1651
1652         /* refresh our structs */
1653         hid_setup_resolution_multiplier(hid);
1654 }
1655
1656 static void report_features(struct hid_device *hid)
1657 {
1658         struct hid_driver *drv = hid->driver;
1659         struct hid_report_enum *rep_enum;
1660         struct hid_report *rep;
1661         struct hid_usage *usage;
1662         int i, j;
1663
1664         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1665         list_for_each_entry(rep, &rep_enum->report_list, list)
1666                 for (i = 0; i < rep->maxfield; i++) {
1667                         /* Ignore if report count is out of bounds. */
1668                         if (rep->field[i]->report_count < 1)
1669                                 continue;
1670
1671                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1672                                 usage = &rep->field[i]->usage[j];
1673
1674                                 /* Verify if Battery Strength feature is available */
1675                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1676                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1677                                                                rep->field[i]);
1678
1679                                 if (drv->feature_mapping)
1680                                         drv->feature_mapping(hid, rep->field[i], usage);
1681                         }
1682                 }
1683 }
1684
1685 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1686                                            unsigned int application)
1687 {
1688         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1689         struct input_dev *input_dev = input_allocate_device();
1690         const char *suffix = NULL;
1691         size_t suffix_len, name_len;
1692
1693         if (!hidinput || !input_dev)
1694                 goto fail;
1695
1696         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1697             hid->maxapplication > 1) {
1698                 switch (application) {
1699                 case HID_GD_KEYBOARD:
1700                         suffix = "Keyboard";
1701                         break;
1702                 case HID_GD_KEYPAD:
1703                         suffix = "Keypad";
1704                         break;
1705                 case HID_GD_MOUSE:
1706                         suffix = "Mouse";
1707                         break;
1708                 case HID_DG_STYLUS:
1709                         suffix = "Pen";
1710                         break;
1711                 case HID_DG_TOUCHSCREEN:
1712                         suffix = "Touchscreen";
1713                         break;
1714                 case HID_DG_TOUCHPAD:
1715                         suffix = "Touchpad";
1716                         break;
1717                 case HID_GD_SYSTEM_CONTROL:
1718                         suffix = "System Control";
1719                         break;
1720                 case HID_CP_CONSUMER_CONTROL:
1721                         suffix = "Consumer Control";
1722                         break;
1723                 case HID_GD_WIRELESS_RADIO_CTLS:
1724                         suffix = "Wireless Radio Control";
1725                         break;
1726                 case HID_GD_SYSTEM_MULTIAXIS:
1727                         suffix = "System Multi Axis";
1728                         break;
1729                 default:
1730                         break;
1731                 }
1732         }
1733
1734         if (suffix) {
1735                 name_len = strlen(hid->name);
1736                 suffix_len = strlen(suffix);
1737                 if ((name_len < suffix_len) ||
1738                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1739                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1740                                                    hid->name, suffix);
1741                         if (!hidinput->name)
1742                                 goto fail;
1743                 }
1744         }
1745
1746         input_set_drvdata(input_dev, hid);
1747         input_dev->event = hidinput_input_event;
1748         input_dev->open = hidinput_open;
1749         input_dev->close = hidinput_close;
1750         input_dev->setkeycode = hidinput_setkeycode;
1751         input_dev->getkeycode = hidinput_getkeycode;
1752
1753         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1754         input_dev->phys = hid->phys;
1755         input_dev->uniq = hid->uniq;
1756         input_dev->id.bustype = hid->bus;
1757         input_dev->id.vendor  = hid->vendor;
1758         input_dev->id.product = hid->product;
1759         input_dev->id.version = hid->version;
1760         input_dev->dev.parent = &hid->dev;
1761
1762         hidinput->input = input_dev;
1763         hidinput->application = application;
1764         list_add_tail(&hidinput->list, &hid->inputs);
1765
1766         INIT_LIST_HEAD(&hidinput->reports);
1767
1768         return hidinput;
1769
1770 fail:
1771         kfree(hidinput);
1772         input_free_device(input_dev);
1773         hid_err(hid, "Out of memory during hid input probe\n");
1774         return NULL;
1775 }
1776
1777 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1778 {
1779         int i;
1780         unsigned long r = 0;
1781
1782         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1783                 r |= hidinput->input->evbit[i];
1784
1785         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1786                 r |= hidinput->input->keybit[i];
1787
1788         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1789                 r |= hidinput->input->relbit[i];
1790
1791         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1792                 r |= hidinput->input->absbit[i];
1793
1794         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1795                 r |= hidinput->input->mscbit[i];
1796
1797         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1798                 r |= hidinput->input->ledbit[i];
1799
1800         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1801                 r |= hidinput->input->sndbit[i];
1802
1803         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1804                 r |= hidinput->input->ffbit[i];
1805
1806         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1807                 r |= hidinput->input->swbit[i];
1808
1809         return !!r;
1810 }
1811
1812 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1813                 struct hid_input *hidinput)
1814 {
1815         struct hid_report *report;
1816         int i, k;
1817
1818         list_del(&hidinput->list);
1819         input_free_device(hidinput->input);
1820         kfree(hidinput->name);
1821
1822         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1823                 if (k == HID_OUTPUT_REPORT &&
1824                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1825                         continue;
1826
1827                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1828                                     list) {
1829
1830                         for (i = 0; i < report->maxfield; i++)
1831                                 if (report->field[i]->hidinput == hidinput)
1832                                         report->field[i]->hidinput = NULL;
1833                 }
1834         }
1835
1836         kfree(hidinput);
1837 }
1838
1839 static struct hid_input *hidinput_match(struct hid_report *report)
1840 {
1841         struct hid_device *hid = report->device;
1842         struct hid_input *hidinput;
1843
1844         list_for_each_entry(hidinput, &hid->inputs, list) {
1845                 if (hidinput->report &&
1846                     hidinput->report->id == report->id)
1847                         return hidinput;
1848         }
1849
1850         return NULL;
1851 }
1852
1853 static struct hid_input *hidinput_match_application(struct hid_report *report)
1854 {
1855         struct hid_device *hid = report->device;
1856         struct hid_input *hidinput;
1857
1858         list_for_each_entry(hidinput, &hid->inputs, list) {
1859                 if (hidinput->application == report->application)
1860                         return hidinput;
1861         }
1862
1863         return NULL;
1864 }
1865
1866 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1867                                              struct hid_report *report)
1868 {
1869         int i, j;
1870
1871         for (i = 0; i < report->maxfield; i++)
1872                 for (j = 0; j < report->field[i]->maxusage; j++)
1873                         hidinput_configure_usage(hidinput, report->field[i],
1874                                                  report->field[i]->usage + j);
1875 }
1876
1877 /*
1878  * Register the input device; print a message.
1879  * Configure the input layer interface
1880  * Read all reports and initialize the absolute field values.
1881  */
1882
1883 int hidinput_connect(struct hid_device *hid, unsigned int force)
1884 {
1885         struct hid_driver *drv = hid->driver;
1886         struct hid_report *report;
1887         struct hid_input *next, *hidinput = NULL;
1888         unsigned int application;
1889         int i, k;
1890
1891         INIT_LIST_HEAD(&hid->inputs);
1892         INIT_WORK(&hid->led_work, hidinput_led_worker);
1893
1894         hid->status &= ~HID_STAT_DUP_DETECTED;
1895
1896         if (!force) {
1897                 for (i = 0; i < hid->maxcollection; i++) {
1898                         struct hid_collection *col = &hid->collection[i];
1899                         if (col->type == HID_COLLECTION_APPLICATION ||
1900                                         col->type == HID_COLLECTION_PHYSICAL)
1901                                 if (IS_INPUT_APPLICATION(col->usage))
1902                                         break;
1903                 }
1904
1905                 if (i == hid->maxcollection)
1906                         return -1;
1907         }
1908
1909         report_features(hid);
1910
1911         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1912                 if (k == HID_OUTPUT_REPORT &&
1913                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1914                         continue;
1915
1916                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1917
1918                         if (!report->maxfield)
1919                                 continue;
1920
1921                         application = report->application;
1922
1923                         /*
1924                          * Find the previous hidinput report attached
1925                          * to this report id.
1926                          */
1927                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1928                                 hidinput = hidinput_match(report);
1929                         else if (hid->maxapplication > 1 &&
1930                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1931                                 hidinput = hidinput_match_application(report);
1932
1933                         if (!hidinput) {
1934                                 hidinput = hidinput_allocate(hid, application);
1935                                 if (!hidinput)
1936                                         goto out_unwind;
1937                         }
1938
1939                         hidinput_configure_usages(hidinput, report);
1940
1941                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1942                                 hidinput->report = report;
1943
1944                         list_add_tail(&report->hidinput_list,
1945                                       &hidinput->reports);
1946                 }
1947         }
1948
1949         hidinput_change_resolution_multipliers(hid);
1950
1951         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1952                 if (drv->input_configured &&
1953                     drv->input_configured(hid, hidinput))
1954                         goto out_unwind;
1955
1956                 if (!hidinput_has_been_populated(hidinput)) {
1957                         /* no need to register an input device not populated */
1958                         hidinput_cleanup_hidinput(hid, hidinput);
1959                         continue;
1960                 }
1961
1962                 if (input_register_device(hidinput->input))
1963                         goto out_unwind;
1964                 hidinput->registered = true;
1965         }
1966
1967         if (list_empty(&hid->inputs)) {
1968                 hid_err(hid, "No inputs registered, leaving\n");
1969                 goto out_unwind;
1970         }
1971
1972         if (hid->status & HID_STAT_DUP_DETECTED)
1973                 hid_dbg(hid,
1974                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1975
1976         return 0;
1977
1978 out_unwind:
1979         /* unwind the ones we already registered */
1980         hidinput_disconnect(hid);
1981
1982         return -1;
1983 }
1984 EXPORT_SYMBOL_GPL(hidinput_connect);
1985
1986 void hidinput_disconnect(struct hid_device *hid)
1987 {
1988         struct hid_input *hidinput, *next;
1989
1990         hidinput_cleanup_battery(hid);
1991
1992         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1993                 list_del(&hidinput->list);
1994                 if (hidinput->registered)
1995                         input_unregister_device(hidinput->input);
1996                 else
1997                         input_free_device(hidinput->input);
1998                 kfree(hidinput->name);
1999                 kfree(hidinput);
2000         }
2001
2002         /* led_work is spawned by input_dev callbacks, but doesn't access the
2003          * parent input_dev at all. Once all input devices are removed, we
2004          * know that led_work will never get restarted, so we can cancel it
2005          * synchronously and are safe. */
2006         cancel_work_sync(&hid->led_work);
2007 }
2008 EXPORT_SYMBOL_GPL(hidinput_disconnect);