drivers/hid/hid-input.c

   1 /*
   2  *  Copyright (c) 2000-2001 Vojtech Pavlik
   3  *  Copyright (c) 2006-2010 Jiri Kosina
   4  *
   5  *  HID to Linux Input mapping
   6  */
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  * Should you need to contact me, the author, you can do so either by
  24  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  25  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/slab.h>
  30 #include <linux/kernel.h>
  31
  32 #include <linux/hid.h>
  33 #include <linux/hid-debug.h>
  34
  35 #include "hid-ids.h"
  36
  37 #define unk     KEY_UNKNOWN
  38
  39 static const unsigned char hid_keyboard[256] = {
  40           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  41          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  42           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  43          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  44          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  45         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  46          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  47         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  48         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  49         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
  50         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  51         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  52         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  53         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
  54          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  55         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  56 };
  57
  58 static const struct {
  59         __s32 x;
  60         __s32 y;
  61 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  62
  63 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  64 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  65 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  66 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
  67
  68 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  69                 &max, EV_ABS, (c))
  70 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  71                 &max, EV_KEY, (c))
  72
  73 static bool match_scancode(struct hid_usage *usage,
  74                            unsigned int cur_idx, unsigned int scancode)
  75 {
  76         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
  77 }
  78
  79 static bool match_keycode(struct hid_usage *usage,
  80                           unsigned int cur_idx, unsigned int keycode)
  81 {
  82         /*
  83          * We should exclude unmapped usages when doing lookup by keycode.
  84          */
  85         return (usage->type == EV_KEY && usage->code == keycode);
  86 }
  87
  88 static bool match_index(struct hid_usage *usage,
  89                         unsigned int cur_idx, unsigned int idx)
  90 {
  91         return cur_idx == idx;
  92 }
  93
  94 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
  95                                 unsigned int cur_idx, unsigned int val);
  96
  97 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
  98                                            hid_usage_cmp_t match,
  99                                            unsigned int value,
 100                                            unsigned int *usage_idx)
 101 {
 102         unsigned int i, j, k, cur_idx = 0;
 103         struct hid_report *report;
 104         struct hid_usage *usage;
 105
 106         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 107                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 108                         for (i = 0; i < report->maxfield; i++) {
 109                                 for (j = 0; j < report->field[i]->maxusage; j++) {
 110                                         usage = report->field[i]->usage + j;
 111                                         if (usage->type == EV_KEY || usage->type == 0) {
 112                                                 if (match(usage, cur_idx, value)) {
 113                                                         if (usage_idx)
 114                                                                 *usage_idx = cur_idx;
 115                                                         return usage;
 116                                                 }
 117                                                 cur_idx++;
 118                                         }
 119                                 }
 120                         }
 121                 }
 122         }
 123         return NULL;
 124 }
 125
 126 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 127                                         const struct input_keymap_entry *ke,
 128                                         unsigned int *index)
 129 {
 130         struct hid_usage *usage;
 131         unsigned int scancode;
 132
 133         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 134                 usage = hidinput_find_key(hid, match_index, ke->index, index);
 135         else if (input_scancode_to_scalar(ke, &scancode) == 0)
 136                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
 137         else
 138                 usage = NULL;
 139
 140         return usage;
 141 }
 142
 143 static int hidinput_getkeycode(struct input_dev *dev,
 144                                struct input_keymap_entry *ke)
 145 {
 146         struct hid_device *hid = input_get_drvdata(dev);
 147         struct hid_usage *usage;
 148         unsigned int scancode, index;
 149
 150         usage = hidinput_locate_usage(hid, ke, &index);
 151         if (usage) {
 152                 ke->keycode = usage->type == EV_KEY ?
 153                                 usage->code : KEY_RESERVED;
 154                 ke->index = index;
 155                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 156                 ke->len = sizeof(scancode);
 157                 memcpy(ke->scancode, &scancode, sizeof(scancode));
 158                 return 0;
 159         }
 160
 161         return -EINVAL;
 162 }
 163
 164 static int hidinput_setkeycode(struct input_dev *dev,
 165                                const struct input_keymap_entry *ke,
 166                                unsigned int *old_keycode)
 167 {
 168         struct hid_device *hid = input_get_drvdata(dev);
 169         struct hid_usage *usage;
 170
 171         usage = hidinput_locate_usage(hid, ke, NULL);
 172         if (usage) {
 173                 *old_keycode = usage->type == EV_KEY ?
 174                                 usage->code : KEY_RESERVED;
 175                 usage->code = ke->keycode;
 176
 177                 clear_bit(*old_keycode, dev->keybit);
 178                 set_bit(usage->code, dev->keybit);
 179                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
 180                         usage->code, usage->hid);
 181
 182                 /*
 183                  * Set the keybit for the old keycode if the old keycode is used
 184                  * by another key
 185                  */
 186                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 187                         set_bit(*old_keycode, dev->keybit);
 188
 189                 return 0;
 190         }
 191
 192         return -EINVAL;
 193 }
 194
 195
 196 /**
 197  * hidinput_calc_abs_res - calculate an absolute axis resolution
 198  * @field: the HID report field to calculate resolution for
 199  * @code: axis code
 200  *
 201  * The formula is:
 202  *                         (logical_maximum - logical_minimum)
 203  * resolution = ----------------------------------------------------------
 204  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 205  *
 206  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 207  *
 208  * Only exponent 1 length units are processed. Centimeters and inches are
 209  * converted to millimeters. Degrees are converted to radians.
 210  */
 211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 212 {
 213         __s32 unit_exponent = field->unit_exponent;
 214         __s32 logical_extents = field->logical_maximum -
 215                                         field->logical_minimum;
 216         __s32 physical_extents = field->physical_maximum -
 217                                         field->physical_minimum;
 218         __s32 prev;
 219
 220         /* Check if the extents are sane */
 221         if (logical_extents <= 0 || physical_extents <= 0)
 222                 return 0;
 223
 224         /*
 225          * Verify and convert units.
 226          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 227          */
 228         switch (code) {
 229         case ABS_X:
 230         case ABS_Y:
 231         case ABS_Z:
 232         case ABS_MT_POSITION_X:
 233         case ABS_MT_POSITION_Y:
 234         case ABS_MT_TOOL_X:
 235         case ABS_MT_TOOL_Y:
 236         case ABS_MT_TOUCH_MAJOR:
 237         case ABS_MT_TOUCH_MINOR:
 238                 if (field->unit == 0x11) {              /* If centimeters */
 239                         /* Convert to millimeters */
 240                         unit_exponent += 1;
 241                 } else if (field->unit == 0x13) {       /* If inches */
 242                         /* Convert to millimeters */
 243                         prev = physical_extents;
 244                         physical_extents *= 254;
 245                         if (physical_extents < prev)
 246                                 return 0;
 247                         unit_exponent -= 1;
 248                 } else {
 249                         return 0;
 250                 }
 251                 break;
 252
 253         case ABS_RX:
 254         case ABS_RY:
 255         case ABS_RZ:
 256         case ABS_WHEEL:
 257         case ABS_TILT_X:
 258         case ABS_TILT_Y:
 259                 if (field->unit == 0x14) {              /* If degrees */
 260                         /* Convert to radians */
 261                         prev = logical_extents;
 262                         logical_extents *= 573;
 263                         if (logical_extents < prev)
 264                                 return 0;
 265                         unit_exponent += 1;
 266                 } else if (field->unit != 0x12) {       /* If not radians */
 267                         return 0;
 268                 }
 269                 break;
 270
 271         default:
 272                 return 0;
 273         }
 274
 275         /* Apply negative unit exponent */
 276         for (; unit_exponent < 0; unit_exponent++) {
 277                 prev = logical_extents;
 278                 logical_extents *= 10;
 279                 if (logical_extents < prev)
 280                         return 0;
 281         }
 282         /* Apply positive unit exponent */
 283         for (; unit_exponent > 0; unit_exponent--) {
 284                 prev = physical_extents;
 285                 physical_extents *= 10;
 286                 if (physical_extents < prev)
 287                         return 0;
 288         }
 289
 290         /* Calculate resolution */
 291         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 292 }
 293 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 294
 295 #ifdef CONFIG_HID_BATTERY_STRENGTH
 296 static enum power_supply_property hidinput_battery_props[] = {
 297         POWER_SUPPLY_PROP_PRESENT,
 298         POWER_SUPPLY_PROP_ONLINE,
 299         POWER_SUPPLY_PROP_CAPACITY,
 300         POWER_SUPPLY_PROP_MODEL_NAME,
 301         POWER_SUPPLY_PROP_STATUS,
 302         POWER_SUPPLY_PROP_SCOPE,
 303 };
 304
 305 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 306 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 307 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 308
 309 static const struct hid_device_id hid_battery_quirks[] = {
 310         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 311                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 312           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 313         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 314                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 315           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 316         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 317                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 318           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 319         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 320                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 321           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 322         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 323                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 324           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 325         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 326                 USB_DEVICE_ID_ELECOM_BM084),
 327           HID_BATTERY_QUIRK_IGNORE },
 328         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 329                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
 330           HID_BATTERY_QUIRK_IGNORE },
 331         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 332                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 333           HID_BATTERY_QUIRK_IGNORE },
 334         {}
 335 };
 336
 337 static unsigned find_battery_quirk(struct hid_device *hdev)
 338 {
 339         unsigned quirks = 0;
 340         const struct hid_device_id *match;
 341
 342         match = hid_match_id(hdev, hid_battery_quirks);
 343         if (match != NULL)
 344                 quirks = match->driver_data;
 345
 346         return quirks;
 347 }
 348
 349 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 350                                            int value)
 351 {
 352         if (dev->battery_min < dev->battery_max &&
 353             value >= dev->battery_min && value <= dev->battery_max)
 354                 value = ((value - dev->battery_min) * 100) /
 355                         (dev->battery_max - dev->battery_min);
 356
 357         return value;
 358 }
 359
 360 static int hidinput_query_battery_capacity(struct hid_device *dev)
 361 {
 362         u8 *buf;
 363         int ret;
 364
 365         buf = kmalloc(2, GFP_KERNEL);
 366         if (!buf)
 367                 return -ENOMEM;
 368
 369         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 370                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 371         if (ret != 2) {
 372                 kfree(buf);
 373                 return -ENODATA;
 374         }
 375
 376         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 377         kfree(buf);
 378         return ret;
 379 }
 380
 381 static int hidinput_get_battery_property(struct power_supply *psy,
 382                                          enum power_supply_property prop,
 383                                          union power_supply_propval *val)
 384 {
 385         struct hid_device *dev = power_supply_get_drvdata(psy);
 386         int value;
 387         int ret = 0;
 388
 389         switch (prop) {
 390         case POWER_SUPPLY_PROP_PRESENT:
 391         case POWER_SUPPLY_PROP_ONLINE:
 392                 val->intval = 1;
 393                 break;
 394
 395         case POWER_SUPPLY_PROP_CAPACITY:
 396                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 397                     !dev->battery_avoid_query) {
 398                         value = hidinput_query_battery_capacity(dev);
 399                         if (value < 0)
 400                                 return value;
 401                 } else  {
 402                         value = dev->battery_capacity;
 403                 }
 404
 405                 val->intval = value;
 406                 break;
 407
 408         case POWER_SUPPLY_PROP_MODEL_NAME:
 409                 val->strval = dev->name;
 410                 break;
 411
 412         case POWER_SUPPLY_PROP_STATUS:
 413                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 414                     !dev->battery_avoid_query) {
 415                         value = hidinput_query_battery_capacity(dev);
 416                         if (value < 0)
 417                                 return value;
 418
 419                         dev->battery_capacity = value;
 420                         dev->battery_status = HID_BATTERY_QUERIED;
 421                 }
 422
 423                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 424                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 425                 else if (dev->battery_capacity == 100)
 426                         val->intval = POWER_SUPPLY_STATUS_FULL;
 427                 else
 428                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 429                 break;
 430
 431         case POWER_SUPPLY_PROP_SCOPE:
 432                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 433                 break;
 434
 435         default:
 436                 ret = -EINVAL;
 437                 break;
 438         }
 439
 440         return ret;
 441 }
 442
 443 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 444 {
 445         struct power_supply_desc *psy_desc;
 446         struct power_supply_config psy_cfg = { .drv_data = dev, };
 447         unsigned quirks;
 448         s32 min, max;
 449         int error;
 450
 451         if (dev->battery)
 452                 return 0;       /* already initialized? */
 453
 454         quirks = find_battery_quirk(dev);
 455
 456         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 457                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 458
 459         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 460                 return 0;
 461
 462         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 463         if (!psy_desc)
 464                 return -ENOMEM;
 465
 466         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 467                                    strlen(dev->uniq) ?
 468                                         dev->uniq : dev_name(&dev->dev));
 469         if (!psy_desc->name) {
 470                 error = -ENOMEM;
 471                 goto err_free_mem;
 472         }
 473
 474         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 475         psy_desc->properties = hidinput_battery_props;
 476         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 477         psy_desc->use_for_apm = 0;
 478         psy_desc->get_property = hidinput_get_battery_property;
 479
 480         min = field->logical_minimum;
 481         max = field->logical_maximum;
 482
 483         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 484                 min = 0;
 485                 max = 100;
 486         }
 487
 488         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 489                 report_type = HID_FEATURE_REPORT;
 490
 491         dev->battery_min = min;
 492         dev->battery_max = max;
 493         dev->battery_report_type = report_type;
 494         dev->battery_report_id = field->report->id;
 495
 496         /*
 497          * Stylus is normally not connected to the device and thus we
 498          * can't query the device and get meaningful battery strength.
 499          * We have to wait for the device to report it on its own.
 500          */
 501         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 502                                    field->physical == HID_DG_STYLUS;
 503
 504         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 505         if (IS_ERR(dev->battery)) {
 506                 error = PTR_ERR(dev->battery);
 507                 hid_warn(dev, "can't register power supply: %d\n", error);
 508                 goto err_free_name;
 509         }
 510
 511         power_supply_powers(dev->battery, &dev->dev);
 512         return 0;
 513
 514 err_free_name:
 515         kfree(psy_desc->name);
 516 err_free_mem:
 517         kfree(psy_desc);
 518         dev->battery = NULL;
 519         return error;
 520 }
 521
 522 static void hidinput_cleanup_battery(struct hid_device *dev)
 523 {
 524         const struct power_supply_desc *psy_desc;
 525
 526         if (!dev->battery)
 527                 return;
 528
 529         psy_desc = dev->battery->desc;
 530         power_supply_unregister(dev->battery);
 531         kfree(psy_desc->name);
 532         kfree(psy_desc);
 533         dev->battery = NULL;
 534 }
 535
 536 static void hidinput_update_battery(struct hid_device *dev, int value)
 537 {
 538         int capacity;
 539
 540         if (!dev->battery)
 541                 return;
 542
 543         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 544                 return;
 545
 546         capacity = hidinput_scale_battery_capacity(dev, value);
 547
 548         if (dev->battery_status != HID_BATTERY_REPORTED ||
 549             capacity != dev->battery_capacity) {
 550                 dev->battery_capacity = capacity;
 551                 dev->battery_status = HID_BATTERY_REPORTED;
 552                 power_supply_changed(dev->battery);
 553         }
 554 }
 555 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 556 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 557                                   struct hid_field *field)
 558 {
 559         return 0;
 560 }
 561
 562 static void hidinput_cleanup_battery(struct hid_device *dev)
 563 {
 564 }
 565
 566 static void hidinput_update_battery(struct hid_device *dev, int value)
 567 {
 568 }
 569 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 570
 571 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 572                                      struct hid_usage *usage)
 573 {
 574         struct input_dev *input = hidinput->input;
 575         struct hid_device *device = input_get_drvdata(input);
 576         int max = 0, code;
 577         unsigned long *bit = NULL;
 578
 579         field->hidinput = hidinput;
 580
 581         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 582                 goto ignore;
 583
 584         /* Ignore if report count is out of bounds. */
 585         if (field->report_count < 1)
 586                 goto ignore;
 587
 588         /* only LED usages are supported in output fields */
 589         if (field->report_type == HID_OUTPUT_REPORT &&
 590                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 591                 goto ignore;
 592         }
 593
 594         if (device->driver->input_mapping) {
 595                 int ret = device->driver->input_mapping(device, hidinput, field,
 596                                 usage, &bit, &max);
 597                 if (ret > 0)
 598                         goto mapped;
 599                 if (ret < 0)
 600                         goto ignore;
 601         }
 602
 603         switch (usage->hid & HID_USAGE_PAGE) {
 604         case HID_UP_UNDEFINED:
 605                 goto ignore;
 606
 607         case HID_UP_KEYBOARD:
 608                 set_bit(EV_REP, input->evbit);
 609
 610                 if ((usage->hid & HID_USAGE) < 256) {
 611                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 612                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 613                 } else
 614                         map_key(KEY_UNKNOWN);
 615
 616                 break;
 617
 618         case HID_UP_BUTTON:
 619                 code = ((usage->hid - 1) & HID_USAGE);
 620
 621                 switch (field->application) {
 622                 case HID_GD_MOUSE:
 623                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 624                 case HID_GD_JOYSTICK:
 625                                 if (code <= 0xf)
 626                                         code += BTN_JOYSTICK;
 627                                 else
 628                                         code += BTN_TRIGGER_HAPPY - 0x10;
 629                                 break;
 630                 case HID_GD_GAMEPAD:
 631                                 if (code <= 0xf)
 632                                         code += BTN_GAMEPAD;
 633                                 else
 634                                         code += BTN_TRIGGER_HAPPY - 0x10;
 635                                 break;
 636                 default:
 637                         switch (field->physical) {
 638                         case HID_GD_MOUSE:
 639                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 640                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 641                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 642                         default:              code += BTN_MISC;
 643                         }
 644                 }
 645
 646                 map_key(code);
 647                 break;
 648
 649         case HID_UP_SIMULATION:
 650                 switch (usage->hid & 0xffff) {
 651                 case 0xba: map_abs(ABS_RUDDER);   break;
 652                 case 0xbb: map_abs(ABS_THROTTLE); break;
 653                 case 0xc4: map_abs(ABS_GAS);      break;
 654                 case 0xc5: map_abs(ABS_BRAKE);    break;
 655                 case 0xc8: map_abs(ABS_WHEEL);    break;
 656                 default:   goto ignore;
 657                 }
 658                 break;
 659
 660         case HID_UP_GENDESK:
 661                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 662                         switch (usage->hid & 0xf) {
 663                         case 0x1: map_key_clear(KEY_POWER);  break;
 664                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 665                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 666                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 667                         case 0x5: map_key_clear(KEY_MENU); break;
 668                         case 0x6: map_key_clear(KEY_PROG1); break;
 669                         case 0x7: map_key_clear(KEY_HELP); break;
 670                         case 0x8: map_key_clear(KEY_EXIT); break;
 671                         case 0x9: map_key_clear(KEY_SELECT); break;
 672                         case 0xa: map_key_clear(KEY_RIGHT); break;
 673                         case 0xb: map_key_clear(KEY_LEFT); break;
 674                         case 0xc: map_key_clear(KEY_UP); break;
 675                         case 0xd: map_key_clear(KEY_DOWN); break;
 676                         case 0xe: map_key_clear(KEY_POWER2); break;
 677                         case 0xf: map_key_clear(KEY_RESTART); break;
 678                         default: goto unknown;
 679                         }
 680                         break;
 681                 }
 682
 683                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 684                         switch (usage->hid & 0xf) {
 685                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 686                         default: goto ignore;
 687                         }
 688                         break;
 689                 }
 690
 691                 /*
 692                  * Some lazy vendors declare 255 usages for System Control,
 693                  * leading to the creation of ABS_X|Y axis and too many others.
 694                  * It wouldn't be a problem if joydev doesn't consider the
 695                  * device as a joystick then.
 696                  */
 697                 if (field->application == HID_GD_SYSTEM_CONTROL)
 698                         goto ignore;
 699
 700                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 701                         switch (usage->hid) {
 702                         case HID_GD_UP:    usage->hat_dir = 1; break;
 703                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 704                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 705                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 706                         default: goto unknown;
 707                         }
 708                         if (field->dpad) {
 709                                 map_abs(field->dpad);
 710                                 goto ignore;
 711                         }
 712                         map_abs(ABS_HAT0X);
 713                         break;
 714                 }
 715
 716                 switch (usage->hid) {
 717                 /* These usage IDs map directly to the usage codes. */
 718                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 719                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 720                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 721                                 map_rel(usage->hid & 0xf);
 722                         else
 723                                 map_abs_clear(usage->hid & 0xf);
 724                         break;
 725
 726                 case HID_GD_WHEEL:
 727                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 728                                 set_bit(REL_WHEEL, input->relbit);
 729                                 map_rel(REL_WHEEL_HI_RES);
 730                         } else {
 731                                 map_abs(usage->hid & 0xf);
 732                         }
 733                         break;
 734                 case HID_GD_SLIDER: case HID_GD_DIAL:
 735                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 736                                 map_rel(usage->hid & 0xf);
 737                         else
 738                                 map_abs(usage->hid & 0xf);
 739                         break;
 740
 741                 case HID_GD_HATSWITCH:
 742                         usage->hat_min = field->logical_minimum;
 743                         usage->hat_max = field->logical_maximum;
 744                         map_abs(ABS_HAT0X);
 745                         break;
 746
 747                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 748                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 749
 750                 case HID_GD_RFKILL_BTN:
 751                         /* MS wireless radio ctl extension, also check CA */
 752                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 753                                 map_key_clear(KEY_RFKILL);
 754                                 /* We need to simulate the btn release */
 755                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 756                                 break;
 757                         }
 758
 759                 default: goto unknown;
 760                 }
 761
 762                 break;
 763
 764         case HID_UP_LED:
 765                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 766                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 767                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 768                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 769                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 770                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 771                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 772                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 773                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 774                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 775                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 776                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 777
 778                 default: goto ignore;
 779                 }
 780                 break;
 781
 782         case HID_UP_DIGITIZER:
 783                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 784                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 785                 else if ((field->application & 0xff) == 0x02) /* Pen */
 786                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 787
 788                 switch (usage->hid & 0xff) {
 789                 case 0x00: /* Undefined */
 790                         goto ignore;
 791
 792                 case 0x30: /* TipPressure */
 793                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 794                                 device->quirks |= HID_QUIRK_NOTOUCH;
 795                                 set_bit(EV_KEY, input->evbit);
 796                                 set_bit(BTN_TOUCH, input->keybit);
 797                         }
 798                         map_abs_clear(ABS_PRESSURE);
 799                         break;
 800
 801                 case 0x32: /* InRange */
 802                         switch (field->physical & 0xff) {
 803                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 804                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 805                         default: map_key(BTN_TOOL_PEN); break;
 806                         }
 807                         break;
 808
 809                 case 0x3b: /* Battery Strength */
 810                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 811                         usage->type = EV_PWR;
 812                         goto ignore;
 813
 814                 case 0x3c: /* Invert */
 815                         map_key_clear(BTN_TOOL_RUBBER);
 816                         break;
 817
 818                 case 0x3d: /* X Tilt */
 819                         map_abs_clear(ABS_TILT_X);
 820                         break;
 821
 822                 case 0x3e: /* Y Tilt */
 823                         map_abs_clear(ABS_TILT_Y);
 824                         break;
 825
 826                 case 0x33: /* Touch */
 827                 case 0x42: /* TipSwitch */
 828                 case 0x43: /* TipSwitch2 */
 829                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 830                         map_key_clear(BTN_TOUCH);
 831                         break;
 832
 833                 case 0x44: /* BarrelSwitch */
 834                         map_key_clear(BTN_STYLUS);
 835                         break;
 836
 837                 case 0x45: /* ERASER */
 838                         /*
 839                          * This event is reported when eraser tip touches the surface.
 840                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 841                          * tool gets in proximity.
 842                          */
 843                         map_key_clear(BTN_TOUCH);
 844                         break;
 845
 846                 case 0x46: /* TabletPick */
 847                 case 0x5a: /* SecondaryBarrelSwitch */
 848                         map_key_clear(BTN_STYLUS2);
 849                         break;
 850
 851                 case 0x5b: /* TransducerSerialNumber */
 852                         usage->type = EV_MSC;
 853                         usage->code = MSC_SERIAL;
 854                         bit = input->mscbit;
 855                         max = MSC_MAX;
 856                         break;
 857
 858                 default:  goto unknown;
 859                 }
 860                 break;
 861
 862         case HID_UP_TELEPHONY:
 863                 switch (usage->hid & HID_USAGE) {
 864                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 865                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 866                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 867                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 868                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 869                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 870                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 871                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 872                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 873                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 874                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 875                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 876                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 877                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 878                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 879                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 880                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 881                 default: goto ignore;
 882                 }
 883                 break;
 884
 885         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 886                 switch (usage->hid & HID_USAGE) {
 887                 case 0x000: goto ignore;
 888                 case 0x030: map_key_clear(KEY_POWER);           break;
 889                 case 0x031: map_key_clear(KEY_RESTART);         break;
 890                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 891                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 892                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 893                 case 0x036: map_key_clear(BTN_MISC);            break;
 894
 895                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 896                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 897                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 898                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 899                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 900                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 901                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 902                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 903                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 904
 905                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 906                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 907                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 908                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 909                 case 0x069: map_key_clear(KEY_RED);             break;
 910                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 911                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 912                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 913                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 914
 915                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 916                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 917                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 918                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 919                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 920                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 921
 922                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 923                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 924                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 925
 926                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 927                 case 0x083: map_key_clear(KEY_LAST);            break;
 928                 case 0x084: map_key_clear(KEY_ENTER);           break;
 929                 case 0x088: map_key_clear(KEY_PC);              break;
 930                 case 0x089: map_key_clear(KEY_TV);              break;
 931                 case 0x08a: map_key_clear(KEY_WWW);             break;
 932                 case 0x08b: map_key_clear(KEY_DVD);             break;
 933                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 934                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 935                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 936                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 937                 case 0x090: map_key_clear(KEY_MEMO);            break;
 938                 case 0x091: map_key_clear(KEY_CD);              break;
 939                 case 0x092: map_key_clear(KEY_VCR);             break;
 940                 case 0x093: map_key_clear(KEY_TUNER);           break;
 941                 case 0x094: map_key_clear(KEY_EXIT);            break;
 942                 case 0x095: map_key_clear(KEY_HELP);            break;
 943                 case 0x096: map_key_clear(KEY_TAPE);            break;
 944                 case 0x097: map_key_clear(KEY_TV2);             break;
 945                 case 0x098: map_key_clear(KEY_SAT);             break;
 946                 case 0x09a: map_key_clear(KEY_PVR);             break;
 947
 948                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 949                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 950                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 951
 952                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 953                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 954                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 955                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 956                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 957                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 958                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 959                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 960                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 961                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 962                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 963                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 964
 965                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 966                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 967                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 968                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 969                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 970                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 971                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 972                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 973
 974                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 975                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 976                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 977                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 978                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 979                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 980                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 981                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 982                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 983                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 984                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 985                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 986                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 987                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 988                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 989                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 990                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 991                 case 0x192: map_key_clear(KEY_CALC);            break;
 992                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 993                 case 0x194: map_key_clear(KEY_FILE);            break;
 994                 case 0x196: map_key_clear(KEY_WWW);             break;
 995                 case 0x199: map_key_clear(KEY_CHAT);            break;
 996                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 997                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 998                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 999                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1000                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1001                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1002                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1003                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1004                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1005                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1006                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1007                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1008                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1009                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1010                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1011                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1012                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1013                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1014                 case 0x201: map_key_clear(KEY_NEW);             break;
1015                 case 0x202: map_key_clear(KEY_OPEN);            break;
1016                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1017                 case 0x204: map_key_clear(KEY_EXIT);            break;
1018                 case 0x207: map_key_clear(KEY_SAVE);            break;
1019                 case 0x208: map_key_clear(KEY_PRINT);           break;
1020                 case 0x209: map_key_clear(KEY_PROPS);           break;
1021                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1022                 case 0x21b: map_key_clear(KEY_COPY);            break;
1023                 case 0x21c: map_key_clear(KEY_CUT);             break;
1024                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1025                 case 0x21f: map_key_clear(KEY_FIND);            break;
1026                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1027                 case 0x222: map_key_clear(KEY_GOTO);            break;
1028                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1029                 case 0x224: map_key_clear(KEY_BACK);            break;
1030                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1031                 case 0x226: map_key_clear(KEY_STOP);            break;
1032                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1033                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1034                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1035                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1036                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1037                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1038                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1039                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1040                 case 0x238: /* AC Pan */
1041                         set_bit(REL_HWHEEL, input->relbit);
1042                         map_rel(REL_HWHEEL_HI_RES);
1043                         break;
1044                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1045                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1046                 case 0x269: map_key_clear(KEY_INSERT);          break;
1047                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1048                 case 0x279: map_key_clear(KEY_REDO);            break;
1049
1050                 case 0x289: map_key_clear(KEY_REPLY);           break;
1051                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1052                 case 0x28c: map_key_clear(KEY_SEND);            break;
1053
1054                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1055                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1056                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1057                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1058                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1059                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1060
1061                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1062
1063                 default: map_key_clear(KEY_UNKNOWN);
1064                 }
1065                 break;
1066
1067         case HID_UP_GENDEVCTRLS:
1068                 switch (usage->hid) {
1069                 case HID_DC_BATTERYSTRENGTH:
1070                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1071                         usage->type = EV_PWR;
1072                         goto ignore;
1073                 }
1074                 goto unknown;
1075
1076         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1077                 set_bit(EV_REP, input->evbit);
1078                 switch (usage->hid & HID_USAGE) {
1079                 case 0x021: map_key_clear(KEY_PRINT);           break;
1080                 case 0x070: map_key_clear(KEY_HP);              break;
1081                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1082                 case 0x072: map_key_clear(KEY_SOUND);           break;
1083                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1084                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1085                 case 0x081: map_key_clear(KEY_CHAT);            break;
1086                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1087                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1088                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1089                 case 0x085: map_key_clear(KEY_SPORT);           break;
1090                 case 0x086: map_key_clear(KEY_SHOP);            break;
1091                 default:    goto ignore;
1092                 }
1093                 break;
1094
1095         case HID_UP_HPVENDOR2:
1096                 set_bit(EV_REP, input->evbit);
1097                 switch (usage->hid & HID_USAGE) {
1098                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1099                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1100                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1101                 default:    goto ignore;
1102                 }
1103                 break;
1104
1105         case HID_UP_MSVENDOR:
1106                 goto ignore;
1107
1108         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1109                 set_bit(EV_REP, input->evbit);
1110                 goto ignore;
1111
1112         case HID_UP_LOGIVENDOR:
1113                 /* intentional fallback */
1114         case HID_UP_LOGIVENDOR2:
1115                 /* intentional fallback */
1116         case HID_UP_LOGIVENDOR3:
1117                 goto ignore;
1118
1119         case HID_UP_PID:
1120                 switch (usage->hid & HID_USAGE) {
1121                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1122                 default: goto ignore;
1123                 }
1124                 break;
1125
1126         default:
1127         unknown:
1128                 if (field->report_size == 1) {
1129                         if (field->report->type == HID_OUTPUT_REPORT) {
1130                                 map_led(LED_MISC);
1131                                 break;
1132                         }
1133                         map_key(BTN_MISC);
1134                         break;
1135                 }
1136                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1137                         map_rel(REL_MISC);
1138                         break;
1139                 }
1140                 map_abs(ABS_MISC);
1141                 break;
1142         }
1143
1144 mapped:
1145         if (device->driver->input_mapped && device->driver->input_mapped(device,
1146                                 hidinput, field, usage, &bit, &max) < 0)
1147                 goto ignore;
1148
1149         set_bit(usage->type, input->evbit);
1150
1151         /*
1152          * This part is *really* controversial:
1153          * - HID aims at being generic so we should do our best to export
1154          *   all incoming events
1155          * - HID describes what events are, so there is no reason for ABS_X
1156          *   to be mapped to ABS_Y
1157          * - HID is using *_MISC+N as a default value, but nothing prevents
1158          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1159          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1160          *   processing)
1161          *
1162          * If devices still want to use this (at their own risk), they will
1163          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1164          * the default should be a reliable mapping.
1165          */
1166         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1167                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1168                         usage->code = find_next_zero_bit(bit,
1169                                                          max + 1,
1170                                                          usage->code);
1171                 } else {
1172                         device->status |= HID_STAT_DUP_DETECTED;
1173                         goto ignore;
1174                 }
1175         }
1176
1177         if (usage->code > max)
1178                 goto ignore;
1179
1180         if (usage->type == EV_ABS) {
1181
1182                 int a = field->logical_minimum;
1183                 int b = field->logical_maximum;
1184
1185                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1186                         a = field->logical_minimum = 0;
1187                         b = field->logical_maximum = 255;
1188                 }
1189
1190                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1191                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1192                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1193
1194                 input_abs_set_res(input, usage->code,
1195                                   hidinput_calc_abs_res(field, usage->code));
1196
1197                 /* use a larger default input buffer for MT devices */
1198                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1199                         input_set_events_per_packet(input, 60);
1200         }
1201
1202         if (usage->type == EV_ABS &&
1203             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1204                 int i;
1205                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1206                         input_set_abs_params(input, i, -1, 1, 0, 0);
1207                         set_bit(i, input->absbit);
1208                 }
1209                 if (usage->hat_dir && !field->dpad)
1210                         field->dpad = usage->code;
1211         }
1212
1213         /* for those devices which produce Consumer volume usage as relative,
1214          * we emulate pressing volumeup/volumedown appropriate number of times
1215          * in hidinput_hid_event()
1216          */
1217         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1218                         (usage->code == ABS_VOLUME)) {
1219                 set_bit(KEY_VOLUMEUP, input->keybit);
1220                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1221         }
1222
1223         if (usage->type == EV_KEY) {
1224                 set_bit(EV_MSC, input->evbit);
1225                 set_bit(MSC_SCAN, input->mscbit);
1226         }
1227
1228 ignore:
1229         return;
1230
1231 }
1232
1233 static void hidinput_handle_scroll(struct hid_usage *usage,
1234                                    struct input_dev *input,
1235                                    __s32 value)
1236 {
1237         int code;
1238         int hi_res, lo_res;
1239
1240         if (value == 0)
1241                 return;
1242
1243         if (usage->code == REL_WHEEL_HI_RES)
1244                 code = REL_WHEEL;
1245         else
1246                 code = REL_HWHEEL;
1247
1248         /*
1249          * Windows reports one wheel click as value 120. Where a high-res
1250          * scroll wheel is present, a fraction of 120 is reported instead.
1251          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1252          * adhere to the 120 expectation.
1253          */
1254         hi_res = value * 120/usage->resolution_multiplier;
1255
1256         usage->wheel_accumulated += hi_res;
1257         lo_res = usage->wheel_accumulated/120;
1258         if (lo_res)
1259                 usage->wheel_accumulated -= lo_res * 120;
1260
1261         input_event(input, EV_REL, code, lo_res);
1262         input_event(input, EV_REL, usage->code, hi_res);
1263 }
1264
1265 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1266 {
1267         struct input_dev *input;
1268         unsigned *quirks = &hid->quirks;
1269
1270         if (!usage->type)
1271                 return;
1272
1273         if (usage->type == EV_PWR) {
1274                 hidinput_update_battery(hid, value);
1275                 return;
1276         }
1277
1278         if (!field->hidinput)
1279                 return;
1280
1281         input = field->hidinput->input;
1282
1283         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1284                 int hat_dir = usage->hat_dir;
1285                 if (!hat_dir)
1286                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1287                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1288                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1289                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1290                 return;
1291         }
1292
1293         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1294                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1295                 return;
1296         }
1297
1298         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1299                 if (value) {
1300                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1301                         return;
1302                 }
1303                 input_event(input, usage->type, usage->code, 0);
1304                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1305                 return;
1306         }
1307
1308         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1309                 int a = field->logical_minimum;
1310                 int b = field->logical_maximum;
1311                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1312         }
1313
1314         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1315                 dbg_hid("Maximum Effects - %d\n",value);
1316                 return;
1317         }
1318
1319         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1320                 dbg_hid("PID Pool Report\n");
1321                 return;
1322         }
1323
1324         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1325                 return;
1326
1327         if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1328                                         usage->code == REL_HWHEEL_HI_RES)) {
1329                 hidinput_handle_scroll(usage, input, value);
1330                 return;
1331         }
1332
1333         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1334                         (usage->code == ABS_VOLUME)) {
1335                 int count = abs(value);
1336                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1337                 int i;
1338
1339                 for (i = 0; i < count; i++) {
1340                         input_event(input, EV_KEY, direction, 1);
1341                         input_sync(input);
1342                         input_event(input, EV_KEY, direction, 0);
1343                         input_sync(input);
1344                 }
1345                 return;
1346         }
1347
1348         /*
1349          * Ignore out-of-range values as per HID specification,
1350          * section 5.10 and 6.2.25, when NULL state bit is present.
1351          * When it's not, clamp the value to match Microsoft's input
1352          * driver as mentioned in "Required HID usages for digitizers":
1353          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1354          *
1355          * The logical_minimum < logical_maximum check is done so that we
1356          * don't unintentionally discard values sent by devices which
1357          * don't specify logical min and max.
1358          */
1359         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1360             (field->logical_minimum < field->logical_maximum)) {
1361                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1362                     (value < field->logical_minimum ||
1363                      value > field->logical_maximum)) {
1364                         dbg_hid("Ignoring out-of-range value %x\n", value);
1365                         return;
1366                 }
1367                 value = clamp(value,
1368                               field->logical_minimum,
1369                               field->logical_maximum);
1370         }
1371
1372         /*
1373          * Ignore reports for absolute data if the data didn't change. This is
1374          * not only an optimization but also fixes 'dead' key reports. Some
1375          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1376          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1377          * can only have one of them physically available. The 'dead' keys
1378          * report constant 0. As all map to the same keycode, they'd confuse
1379          * the input layer. If we filter the 'dead' keys on the HID level, we
1380          * skip the keycode translation and only forward real events.
1381          */
1382         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1383                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1384                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1385             usage->usage_index < field->maxusage &&
1386             value == field->value[usage->usage_index])
1387                 return;
1388
1389         /* report the usage code as scancode if the key status has changed */
1390         if (usage->type == EV_KEY &&
1391             (!test_bit(usage->code, input->key)) == value)
1392                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1393
1394         input_event(input, usage->type, usage->code, value);
1395
1396         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1397             usage->type == EV_KEY && value) {
1398                 input_sync(input);
1399                 input_event(input, usage->type, usage->code, 0);
1400         }
1401 }
1402
1403 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1404 {
1405         struct hid_input *hidinput;
1406
1407         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1408                 return;
1409
1410         list_for_each_entry(hidinput, &hid->inputs, list)
1411                 input_sync(hidinput->input);
1412 }
1413 EXPORT_SYMBOL_GPL(hidinput_report_event);
1414
1415 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1416 {
1417         struct hid_report *report;
1418         int i, j;
1419
1420         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1421                 for (i = 0; i < report->maxfield; i++) {
1422                         *field = report->field[i];
1423                         for (j = 0; j < (*field)->maxusage; j++)
1424                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1425                                         return j;
1426                 }
1427         }
1428         return -1;
1429 }
1430 EXPORT_SYMBOL_GPL(hidinput_find_field);
1431
1432 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1433 {
1434         struct hid_report *report;
1435         struct hid_field *field;
1436         int i, j;
1437
1438         list_for_each_entry(report,
1439                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1440                             list) {
1441                 for (i = 0; i < report->maxfield; i++) {
1442                         field = report->field[i];
1443                         for (j = 0; j < field->maxusage; j++)
1444                                 if (field->usage[j].type == EV_LED)
1445                                         return field;
1446                 }
1447         }
1448         return NULL;
1449 }
1450 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1451
1452 unsigned int hidinput_count_leds(struct hid_device *hid)
1453 {
1454         struct hid_report *report;
1455         struct hid_field *field;
1456         int i, j;
1457         unsigned int count = 0;
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                                     field->value[j])
1467                                         count += 1;
1468                 }
1469         }
1470         return count;
1471 }
1472 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1473
1474 static void hidinput_led_worker(struct work_struct *work)
1475 {
1476         struct hid_device *hid = container_of(work, struct hid_device,
1477                                               led_work);
1478         struct hid_field *field;
1479         struct hid_report *report;
1480         int ret;
1481         u32 len;
1482         __u8 *buf;
1483
1484         field = hidinput_get_led_field(hid);
1485         if (!field)
1486                 return;
1487
1488         /*
1489          * field->report is accessed unlocked regarding HID core. So there might
1490          * be another incoming SET-LED request from user-space, which changes
1491          * the LED state while we assemble our outgoing buffer. However, this
1492          * doesn't matter as hid_output_report() correctly converts it into a
1493          * boolean value no matter what information is currently set on the LED
1494          * field (even garbage). So the remote device will always get a valid
1495          * request.
1496          * And in case we send a wrong value, a next led worker is spawned
1497          * for every SET-LED request so the following worker will send the
1498          * correct value, guaranteed!
1499          */
1500
1501         report = field->report;
1502
1503         /* use custom SET_REPORT request if possible (asynchronous) */
1504         if (hid->ll_driver->request)
1505                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1506
1507         /* fall back to generic raw-output-report */
1508         len = hid_report_len(report);
1509         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1510         if (!buf)
1511                 return;
1512
1513         hid_output_report(report, buf);
1514         /* synchronous output report */
1515         ret = hid_hw_output_report(hid, buf, len);
1516         if (ret == -ENOSYS)
1517                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1518                                 HID_REQ_SET_REPORT);
1519         kfree(buf);
1520 }
1521
1522 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1523                                 unsigned int code, int value)
1524 {
1525         struct hid_device *hid = input_get_drvdata(dev);
1526         struct hid_field *field;
1527         int offset;
1528
1529         if (type == EV_FF)
1530                 return input_ff_event(dev, type, code, value);
1531
1532         if (type != EV_LED)
1533                 return -1;
1534
1535         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1536                 hid_warn(dev, "event field not found\n");
1537                 return -1;
1538         }
1539
1540         hid_set_field(field, offset, value);
1541
1542         schedule_work(&hid->led_work);
1543         return 0;
1544 }
1545
1546 static int hidinput_open(struct input_dev *dev)
1547 {
1548         struct hid_device *hid = input_get_drvdata(dev);
1549
1550         return hid_hw_open(hid);
1551 }
1552
1553 static void hidinput_close(struct input_dev *dev)
1554 {
1555         struct hid_device *hid = input_get_drvdata(dev);
1556
1557         hid_hw_close(hid);
1558 }
1559
1560 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1561                 struct hid_report *report, bool use_logical_max)
1562 {
1563         struct hid_usage *usage;
1564         bool update_needed = false;
1565         int i, j;
1566
1567         if (report->maxfield == 0)
1568                 return false;
1569
1570         /*
1571          * If we have more than one feature within this report we
1572          * need to fill in the bits from the others before we can
1573          * overwrite the ones for the Resolution Multiplier.
1574          */
1575         if (report->maxfield > 1) {
1576                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1577                 hid_hw_wait(hid);
1578         }
1579
1580         for (i = 0; i < report->maxfield; i++) {
1581                 __s32 value = use_logical_max ?
1582                               report->field[i]->logical_maximum :
1583                               report->field[i]->logical_minimum;
1584
1585                 /* There is no good reason for a Resolution
1586                  * Multiplier to have a count other than 1.
1587                  * Ignore that case.
1588                  */
1589                 if (report->field[i]->report_count != 1)
1590                         continue;
1591
1592                 for (j = 0; j < report->field[i]->maxusage; j++) {
1593                         usage = &report->field[i]->usage[j];
1594
1595                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1596                                 continue;
1597
1598                         report->field[i]->value[j] = value;
1599                         update_needed = true;
1600                 }
1601         }
1602
1603         return update_needed;
1604 }
1605
1606 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1607 {
1608         struct hid_report_enum *rep_enum;
1609         struct hid_report *rep;
1610         int ret;
1611
1612         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1613         list_for_each_entry(rep, &rep_enum->report_list, list) {
1614                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1615                                                                      rep, true);
1616
1617                 if (update_needed) {
1618                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1619                         if (ret) {
1620                                 __hidinput_change_resolution_multipliers(hid,
1621                                                                     rep, false);
1622                                 return;
1623                         }
1624                 }
1625         }
1626
1627         /* refresh our structs */
1628         hid_setup_resolution_multiplier(hid);
1629 }
1630
1631 static void report_features(struct hid_device *hid)
1632 {
1633         struct hid_driver *drv = hid->driver;
1634         struct hid_report_enum *rep_enum;
1635         struct hid_report *rep;
1636         struct hid_usage *usage;
1637         int i, j;
1638
1639         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1640         list_for_each_entry(rep, &rep_enum->report_list, list)
1641                 for (i = 0; i < rep->maxfield; i++) {
1642                         /* Ignore if report count is out of bounds. */
1643                         if (rep->field[i]->report_count < 1)
1644                                 continue;
1645
1646                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1647                                 usage = &rep->field[i]->usage[j];
1648
1649                                 /* Verify if Battery Strength feature is available */
1650                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1651                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1652                                                                rep->field[i]);
1653
1654                                 if (drv->feature_mapping)
1655                                         drv->feature_mapping(hid, rep->field[i], usage);
1656                         }
1657                 }
1658 }
1659
1660 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1661                                            unsigned int application)
1662 {
1663         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1664         struct input_dev *input_dev = input_allocate_device();
1665         const char *suffix = NULL;
1666         size_t suffix_len, name_len;
1667
1668         if (!hidinput || !input_dev)
1669                 goto fail;
1670
1671         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1672             hid->maxapplication > 1) {
1673                 switch (application) {
1674                 case HID_GD_KEYBOARD:
1675                         suffix = "Keyboard";
1676                         break;
1677                 case HID_GD_KEYPAD:
1678                         suffix = "Keypad";
1679                         break;
1680                 case HID_GD_MOUSE:
1681                         suffix = "Mouse";
1682                         break;
1683                 case HID_DG_STYLUS:
1684                         suffix = "Pen";
1685                         break;
1686                 case HID_DG_TOUCHSCREEN:
1687                         suffix = "Touchscreen";
1688                         break;
1689                 case HID_DG_TOUCHPAD:
1690                         suffix = "Touchpad";
1691                         break;
1692                 case HID_GD_SYSTEM_CONTROL:
1693                         suffix = "System Control";
1694                         break;
1695                 case HID_CP_CONSUMER_CONTROL:
1696                         suffix = "Consumer Control";
1697                         break;
1698                 case HID_GD_WIRELESS_RADIO_CTLS:
1699                         suffix = "Wireless Radio Control";
1700                         break;
1701                 case HID_GD_SYSTEM_MULTIAXIS:
1702                         suffix = "System Multi Axis";
1703                         break;
1704                 default:
1705                         break;
1706                 }
1707         }
1708
1709         if (suffix) {
1710                 name_len = strlen(hid->name);
1711                 suffix_len = strlen(suffix);
1712                 if ((name_len < suffix_len) ||
1713                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1714                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1715                                                    hid->name, suffix);
1716                         if (!hidinput->name)
1717                                 goto fail;
1718                 }
1719         }
1720
1721         input_set_drvdata(input_dev, hid);
1722         input_dev->event = hidinput_input_event;
1723         input_dev->open = hidinput_open;
1724         input_dev->close = hidinput_close;
1725         input_dev->setkeycode = hidinput_setkeycode;
1726         input_dev->getkeycode = hidinput_getkeycode;
1727
1728         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1729         input_dev->phys = hid->phys;
1730         input_dev->uniq = hid->uniq;
1731         input_dev->id.bustype = hid->bus;
1732         input_dev->id.vendor  = hid->vendor;
1733         input_dev->id.product = hid->product;
1734         input_dev->id.version = hid->version;
1735         input_dev->dev.parent = &hid->dev;
1736
1737         hidinput->input = input_dev;
1738         hidinput->application = application;
1739         list_add_tail(&hidinput->list, &hid->inputs);
1740
1741         INIT_LIST_HEAD(&hidinput->reports);
1742
1743         return hidinput;
1744
1745 fail:
1746         kfree(hidinput);
1747         input_free_device(input_dev);
1748         hid_err(hid, "Out of memory during hid input probe\n");
1749         return NULL;
1750 }
1751
1752 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1753 {
1754         int i;
1755         unsigned long r = 0;
1756
1757         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1758                 r |= hidinput->input->evbit[i];
1759
1760         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1761                 r |= hidinput->input->keybit[i];
1762
1763         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1764                 r |= hidinput->input->relbit[i];
1765
1766         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1767                 r |= hidinput->input->absbit[i];
1768
1769         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1770                 r |= hidinput->input->mscbit[i];
1771
1772         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1773                 r |= hidinput->input->ledbit[i];
1774
1775         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1776                 r |= hidinput->input->sndbit[i];
1777
1778         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1779                 r |= hidinput->input->ffbit[i];
1780
1781         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1782                 r |= hidinput->input->swbit[i];
1783
1784         return !!r;
1785 }
1786
1787 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1788                 struct hid_input *hidinput)
1789 {
1790         struct hid_report *report;
1791         int i, k;
1792
1793         list_del(&hidinput->list);
1794         input_free_device(hidinput->input);
1795         kfree(hidinput->name);
1796
1797         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1798                 if (k == HID_OUTPUT_REPORT &&
1799                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1800                         continue;
1801
1802                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1803                                     list) {
1804
1805                         for (i = 0; i < report->maxfield; i++)
1806                                 if (report->field[i]->hidinput == hidinput)
1807                                         report->field[i]->hidinput = NULL;
1808                 }
1809         }
1810
1811         kfree(hidinput);
1812 }
1813
1814 static struct hid_input *hidinput_match(struct hid_report *report)
1815 {
1816         struct hid_device *hid = report->device;
1817         struct hid_input *hidinput;
1818
1819         list_for_each_entry(hidinput, &hid->inputs, list) {
1820                 if (hidinput->report &&
1821                     hidinput->report->id == report->id)
1822                         return hidinput;
1823         }
1824
1825         return NULL;
1826 }
1827
1828 static struct hid_input *hidinput_match_application(struct hid_report *report)
1829 {
1830         struct hid_device *hid = report->device;
1831         struct hid_input *hidinput;
1832
1833         list_for_each_entry(hidinput, &hid->inputs, list) {
1834                 if (hidinput->application == report->application)
1835                         return hidinput;
1836         }
1837
1838         return NULL;
1839 }
1840
1841 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1842                                              struct hid_report *report)
1843 {
1844         int i, j;
1845
1846         for (i = 0; i < report->maxfield; i++)
1847                 for (j = 0; j < report->field[i]->maxusage; j++)
1848                         hidinput_configure_usage(hidinput, report->field[i],
1849                                                  report->field[i]->usage + j);
1850 }
1851
1852 /*
1853  * Register the input device; print a message.
1854  * Configure the input layer interface
1855  * Read all reports and initialize the absolute field values.
1856  */
1857
1858 int hidinput_connect(struct hid_device *hid, unsigned int force)
1859 {
1860         struct hid_driver *drv = hid->driver;
1861         struct hid_report *report;
1862         struct hid_input *next, *hidinput = NULL;
1863         unsigned int application;
1864         int i, k;
1865
1866         INIT_LIST_HEAD(&hid->inputs);
1867         INIT_WORK(&hid->led_work, hidinput_led_worker);
1868
1869         hid->status &= ~HID_STAT_DUP_DETECTED;
1870
1871         if (!force) {
1872                 for (i = 0; i < hid->maxcollection; i++) {
1873                         struct hid_collection *col = &hid->collection[i];
1874                         if (col->type == HID_COLLECTION_APPLICATION ||
1875                                         col->type == HID_COLLECTION_PHYSICAL)
1876                                 if (IS_INPUT_APPLICATION(col->usage))
1877                                         break;
1878                 }
1879
1880                 if (i == hid->maxcollection)
1881                         return -1;
1882         }
1883
1884         report_features(hid);
1885
1886         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1887                 if (k == HID_OUTPUT_REPORT &&
1888                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1889                         continue;
1890
1891                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1892
1893                         if (!report->maxfield)
1894                                 continue;
1895
1896                         application = report->application;
1897
1898                         /*
1899                          * Find the previous hidinput report attached
1900                          * to this report id.
1901                          */
1902                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1903                                 hidinput = hidinput_match(report);
1904                         else if (hid->maxapplication > 1 &&
1905                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1906                                 hidinput = hidinput_match_application(report);
1907
1908                         if (!hidinput) {
1909                                 hidinput = hidinput_allocate(hid, application);
1910                                 if (!hidinput)
1911                                         goto out_unwind;
1912                         }
1913
1914                         hidinput_configure_usages(hidinput, report);
1915
1916                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1917                                 hidinput->report = report;
1918
1919                         list_add_tail(&report->hidinput_list,
1920                                       &hidinput->reports);
1921                 }
1922         }
1923
1924         hidinput_change_resolution_multipliers(hid);
1925
1926         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1927                 if (drv->input_configured &&
1928                     drv->input_configured(hid, hidinput))
1929                         goto out_unwind;
1930
1931                 if (!hidinput_has_been_populated(hidinput)) {
1932                         /* no need to register an input device not populated */
1933                         hidinput_cleanup_hidinput(hid, hidinput);
1934                         continue;
1935                 }
1936
1937                 if (input_register_device(hidinput->input))
1938                         goto out_unwind;
1939                 hidinput->registered = true;
1940         }
1941
1942         if (list_empty(&hid->inputs)) {
1943                 hid_err(hid, "No inputs registered, leaving\n");
1944                 goto out_unwind;
1945         }
1946
1947         if (hid->status & HID_STAT_DUP_DETECTED)
1948                 hid_dbg(hid,
1949                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1950
1951         return 0;
1952
1953 out_unwind:
1954         /* unwind the ones we already registered */
1955         hidinput_disconnect(hid);
1956
1957         return -1;
1958 }
1959 EXPORT_SYMBOL_GPL(hidinput_connect);
1960
1961 void hidinput_disconnect(struct hid_device *hid)
1962 {
1963         struct hid_input *hidinput, *next;
1964
1965         hidinput_cleanup_battery(hid);
1966
1967         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1968                 list_del(&hidinput->list);
1969                 if (hidinput->registered)
1970                         input_unregister_device(hidinput->input);
1971                 else
1972                         input_free_device(hidinput->input);
1973                 kfree(hidinput->name);
1974                 kfree(hidinput);
1975         }
1976
1977         /* led_work is spawned by input_dev callbacks, but doesn't access the
1978          * parent input_dev at all. Once all input devices are removed, we
1979          * know that led_work will never get restarted, so we can cancel it
1980          * synchronously and are safe. */
1981         cancel_work_sync(&hid->led_work);
1982 }
1983 EXPORT_SYMBOL_GPL(hidinput_disconnect);