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         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 335                 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 336           HID_BATTERY_QUIRK_IGNORE },
 337         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 338           HID_BATTERY_QUIRK_IGNORE },
 339         {}
 340 };
 341
 342 static unsigned find_battery_quirk(struct hid_device *hdev)
 343 {
 344         unsigned quirks = 0;
 345         const struct hid_device_id *match;
 346
 347         match = hid_match_id(hdev, hid_battery_quirks);
 348         if (match != NULL)
 349                 quirks = match->driver_data;
 350
 351         return quirks;
 352 }
 353
 354 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 355                                            int value)
 356 {
 357         if (dev->battery_min < dev->battery_max &&
 358             value >= dev->battery_min && value <= dev->battery_max)
 359                 value = ((value - dev->battery_min) * 100) /
 360                         (dev->battery_max - dev->battery_min);
 361
 362         return value;
 363 }
 364
 365 static int hidinput_query_battery_capacity(struct hid_device *dev)
 366 {
 367         u8 *buf;
 368         int ret;
 369
 370         buf = kmalloc(4, GFP_KERNEL);
 371         if (!buf)
 372                 return -ENOMEM;
 373
 374         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 375                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 376         if (ret < 2) {
 377                 kfree(buf);
 378                 return -ENODATA;
 379         }
 380
 381         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 382         kfree(buf);
 383         return ret;
 384 }
 385
 386 static int hidinput_get_battery_property(struct power_supply *psy,
 387                                          enum power_supply_property prop,
 388                                          union power_supply_propval *val)
 389 {
 390         struct hid_device *dev = power_supply_get_drvdata(psy);
 391         int value;
 392         int ret = 0;
 393
 394         switch (prop) {
 395         case POWER_SUPPLY_PROP_PRESENT:
 396         case POWER_SUPPLY_PROP_ONLINE:
 397                 val->intval = 1;
 398                 break;
 399
 400         case POWER_SUPPLY_PROP_CAPACITY:
 401                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 402                     !dev->battery_avoid_query) {
 403                         value = hidinput_query_battery_capacity(dev);
 404                         if (value < 0)
 405                                 return value;
 406                 } else  {
 407                         value = dev->battery_capacity;
 408                 }
 409
 410                 val->intval = value;
 411                 break;
 412
 413         case POWER_SUPPLY_PROP_MODEL_NAME:
 414                 val->strval = dev->name;
 415                 break;
 416
 417         case POWER_SUPPLY_PROP_STATUS:
 418                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 419                     !dev->battery_avoid_query) {
 420                         value = hidinput_query_battery_capacity(dev);
 421                         if (value < 0)
 422                                 return value;
 423
 424                         dev->battery_capacity = value;
 425                         dev->battery_status = HID_BATTERY_QUERIED;
 426                 }
 427
 428                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 429                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 430                 else
 431                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 432                 break;
 433
 434         case POWER_SUPPLY_PROP_SCOPE:
 435                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 436                 break;
 437
 438         default:
 439                 ret = -EINVAL;
 440                 break;
 441         }
 442
 443         return ret;
 444 }
 445
 446 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 447 {
 448         struct power_supply_desc *psy_desc;
 449         struct power_supply_config psy_cfg = { .drv_data = dev, };
 450         unsigned quirks;
 451         s32 min, max;
 452         int error;
 453
 454         if (dev->battery)
 455                 return 0;       /* already initialized? */
 456
 457         quirks = find_battery_quirk(dev);
 458
 459         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 460                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 461
 462         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 463                 return 0;
 464
 465         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 466         if (!psy_desc)
 467                 return -ENOMEM;
 468
 469         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 470                                    strlen(dev->uniq) ?
 471                                         dev->uniq : dev_name(&dev->dev));
 472         if (!psy_desc->name) {
 473                 error = -ENOMEM;
 474                 goto err_free_mem;
 475         }
 476
 477         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 478         psy_desc->properties = hidinput_battery_props;
 479         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 480         psy_desc->use_for_apm = 0;
 481         psy_desc->get_property = hidinput_get_battery_property;
 482
 483         min = field->logical_minimum;
 484         max = field->logical_maximum;
 485
 486         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 487                 min = 0;
 488                 max = 100;
 489         }
 490
 491         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 492                 report_type = HID_FEATURE_REPORT;
 493
 494         dev->battery_min = min;
 495         dev->battery_max = max;
 496         dev->battery_report_type = report_type;
 497         dev->battery_report_id = field->report->id;
 498
 499         /*
 500          * Stylus is normally not connected to the device and thus we
 501          * can't query the device and get meaningful battery strength.
 502          * We have to wait for the device to report it on its own.
 503          */
 504         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 505                                    field->physical == HID_DG_STYLUS;
 506
 507         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 508         if (IS_ERR(dev->battery)) {
 509                 error = PTR_ERR(dev->battery);
 510                 hid_warn(dev, "can't register power supply: %d\n", error);
 511                 goto err_free_name;
 512         }
 513
 514         power_supply_powers(dev->battery, &dev->dev);
 515         return 0;
 516
 517 err_free_name:
 518         kfree(psy_desc->name);
 519 err_free_mem:
 520         kfree(psy_desc);
 521         dev->battery = NULL;
 522         return error;
 523 }
 524
 525 static void hidinput_cleanup_battery(struct hid_device *dev)
 526 {
 527         const struct power_supply_desc *psy_desc;
 528
 529         if (!dev->battery)
 530                 return;
 531
 532         psy_desc = dev->battery->desc;
 533         power_supply_unregister(dev->battery);
 534         kfree(psy_desc->name);
 535         kfree(psy_desc);
 536         dev->battery = NULL;
 537 }
 538
 539 static void hidinput_update_battery(struct hid_device *dev, int value)
 540 {
 541         int capacity;
 542
 543         if (!dev->battery)
 544                 return;
 545
 546         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 547                 return;
 548
 549         capacity = hidinput_scale_battery_capacity(dev, value);
 550
 551         if (dev->battery_status != HID_BATTERY_REPORTED ||
 552             capacity != dev->battery_capacity) {
 553                 dev->battery_capacity = capacity;
 554                 dev->battery_status = HID_BATTERY_REPORTED;
 555                 power_supply_changed(dev->battery);
 556         }
 557 }
 558 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 559 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 560                                   struct hid_field *field)
 561 {
 562         return 0;
 563 }
 564
 565 static void hidinput_cleanup_battery(struct hid_device *dev)
 566 {
 567 }
 568
 569 static void hidinput_update_battery(struct hid_device *dev, int value)
 570 {
 571 }
 572 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 573
 574 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 575                                      struct hid_usage *usage)
 576 {
 577         struct input_dev *input = hidinput->input;
 578         struct hid_device *device = input_get_drvdata(input);
 579         int max = 0, code;
 580         unsigned long *bit = NULL;
 581
 582         field->hidinput = hidinput;
 583
 584         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 585                 goto ignore;
 586
 587         /* Ignore if report count is out of bounds. */
 588         if (field->report_count < 1)
 589                 goto ignore;
 590
 591         /* only LED usages are supported in output fields */
 592         if (field->report_type == HID_OUTPUT_REPORT &&
 593                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 594                 goto ignore;
 595         }
 596
 597         if (device->driver->input_mapping) {
 598                 int ret = device->driver->input_mapping(device, hidinput, field,
 599                                 usage, &bit, &max);
 600                 if (ret > 0)
 601                         goto mapped;
 602                 if (ret < 0)
 603                         goto ignore;
 604         }
 605
 606         switch (usage->hid & HID_USAGE_PAGE) {
 607         case HID_UP_UNDEFINED:
 608                 goto ignore;
 609
 610         case HID_UP_KEYBOARD:
 611                 set_bit(EV_REP, input->evbit);
 612
 613                 if ((usage->hid & HID_USAGE) < 256) {
 614                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 615                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 616                 } else
 617                         map_key(KEY_UNKNOWN);
 618
 619                 break;
 620
 621         case HID_UP_BUTTON:
 622                 code = ((usage->hid - 1) & HID_USAGE);
 623
 624                 switch (field->application) {
 625                 case HID_GD_MOUSE:
 626                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 627                 case HID_GD_JOYSTICK:
 628                                 if (code <= 0xf)
 629                                         code += BTN_JOYSTICK;
 630                                 else
 631                                         code += BTN_TRIGGER_HAPPY - 0x10;
 632                                 break;
 633                 case HID_GD_GAMEPAD:
 634                                 if (code <= 0xf)
 635                                         code += BTN_GAMEPAD;
 636                                 else
 637                                         code += BTN_TRIGGER_HAPPY - 0x10;
 638                                 break;
 639                 default:
 640                         switch (field->physical) {
 641                         case HID_GD_MOUSE:
 642                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 643                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 644                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 645                         default:              code += BTN_MISC;
 646                         }
 647                 }
 648
 649                 map_key(code);
 650                 break;
 651
 652         case HID_UP_SIMULATION:
 653                 switch (usage->hid & 0xffff) {
 654                 case 0xba: map_abs(ABS_RUDDER);   break;
 655                 case 0xbb: map_abs(ABS_THROTTLE); break;
 656                 case 0xc4: map_abs(ABS_GAS);      break;
 657                 case 0xc5: map_abs(ABS_BRAKE);    break;
 658                 case 0xc8: map_abs(ABS_WHEEL);    break;
 659                 default:   goto ignore;
 660                 }
 661                 break;
 662
 663         case HID_UP_GENDESK:
 664                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 665                         switch (usage->hid & 0xf) {
 666                         case 0x1: map_key_clear(KEY_POWER);  break;
 667                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 668                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 669                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 670                         case 0x5: map_key_clear(KEY_MENU); break;
 671                         case 0x6: map_key_clear(KEY_PROG1); break;
 672                         case 0x7: map_key_clear(KEY_HELP); break;
 673                         case 0x8: map_key_clear(KEY_EXIT); break;
 674                         case 0x9: map_key_clear(KEY_SELECT); break;
 675                         case 0xa: map_key_clear(KEY_RIGHT); break;
 676                         case 0xb: map_key_clear(KEY_LEFT); break;
 677                         case 0xc: map_key_clear(KEY_UP); break;
 678                         case 0xd: map_key_clear(KEY_DOWN); break;
 679                         case 0xe: map_key_clear(KEY_POWER2); break;
 680                         case 0xf: map_key_clear(KEY_RESTART); break;
 681                         default: goto unknown;
 682                         }
 683                         break;
 684                 }
 685
 686                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 687                         switch (usage->hid & 0xf) {
 688                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 689                         default: goto ignore;
 690                         }
 691                         break;
 692                 }
 693
 694                 /*
 695                  * Some lazy vendors declare 255 usages for System Control,
 696                  * leading to the creation of ABS_X|Y axis and too many others.
 697                  * It wouldn't be a problem if joydev doesn't consider the
 698                  * device as a joystick then.
 699                  */
 700                 if (field->application == HID_GD_SYSTEM_CONTROL)
 701                         goto ignore;
 702
 703                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 704                         switch (usage->hid) {
 705                         case HID_GD_UP:    usage->hat_dir = 1; break;
 706                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 707                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 708                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 709                         default: goto unknown;
 710                         }
 711                         if (field->dpad) {
 712                                 map_abs(field->dpad);
 713                                 goto ignore;
 714                         }
 715                         map_abs(ABS_HAT0X);
 716                         break;
 717                 }
 718
 719                 switch (usage->hid) {
 720                 /* These usage IDs map directly to the usage codes. */
 721                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 722                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 723                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 724                                 map_rel(usage->hid & 0xf);
 725                         else
 726                                 map_abs_clear(usage->hid & 0xf);
 727                         break;
 728
 729                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 730                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 731                                 map_rel(usage->hid & 0xf);
 732                         else
 733                                 map_abs(usage->hid & 0xf);
 734                         break;
 735
 736                 case HID_GD_HATSWITCH:
 737                         usage->hat_min = field->logical_minimum;
 738                         usage->hat_max = field->logical_maximum;
 739                         map_abs(ABS_HAT0X);
 740                         break;
 741
 742                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 743                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 744
 745                 case HID_GD_RFKILL_BTN:
 746                         /* MS wireless radio ctl extension, also check CA */
 747                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 748                                 map_key_clear(KEY_RFKILL);
 749                                 /* We need to simulate the btn release */
 750                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 751                                 break;
 752                         }
 753
 754                 default: goto unknown;
 755                 }
 756
 757                 break;
 758
 759         case HID_UP_LED:
 760                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 761                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 762                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 763                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 764                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 765                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 766                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 767                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 768                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 769                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 770                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 771                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 772
 773                 default: goto ignore;
 774                 }
 775                 break;
 776
 777         case HID_UP_DIGITIZER:
 778                 switch (usage->hid & 0xff) {
 779                 case 0x00: /* Undefined */
 780                         goto ignore;
 781
 782                 case 0x30: /* TipPressure */
 783                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 784                                 device->quirks |= HID_QUIRK_NOTOUCH;
 785                                 set_bit(EV_KEY, input->evbit);
 786                                 set_bit(BTN_TOUCH, input->keybit);
 787                         }
 788                         map_abs_clear(ABS_PRESSURE);
 789                         break;
 790
 791                 case 0x32: /* InRange */
 792                         switch (field->physical & 0xff) {
 793                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 794                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 795                         default: map_key(BTN_TOOL_PEN); break;
 796                         }
 797                         break;
 798
 799                 case 0x3b: /* Battery Strength */
 800                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 801                         usage->type = EV_PWR;
 802                         return;
 803
 804                 case 0x3c: /* Invert */
 805                         map_key_clear(BTN_TOOL_RUBBER);
 806                         break;
 807
 808                 case 0x3d: /* X Tilt */
 809                         map_abs_clear(ABS_TILT_X);
 810                         break;
 811
 812                 case 0x3e: /* Y Tilt */
 813                         map_abs_clear(ABS_TILT_Y);
 814                         break;
 815
 816                 case 0x33: /* Touch */
 817                 case 0x42: /* TipSwitch */
 818                 case 0x43: /* TipSwitch2 */
 819                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 820                         map_key_clear(BTN_TOUCH);
 821                         break;
 822
 823                 case 0x44: /* BarrelSwitch */
 824                         map_key_clear(BTN_STYLUS);
 825                         break;
 826
 827                 case 0x45: /* ERASER */
 828                         /*
 829                          * This event is reported when eraser tip touches the surface.
 830                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 831                          * tool gets in proximity.
 832                          */
 833                         map_key_clear(BTN_TOUCH);
 834                         break;
 835
 836                 case 0x46: /* TabletPick */
 837                 case 0x5a: /* SecondaryBarrelSwitch */
 838                         map_key_clear(BTN_STYLUS2);
 839                         break;
 840
 841                 case 0x5b: /* TransducerSerialNumber */
 842                         usage->type = EV_MSC;
 843                         usage->code = MSC_SERIAL;
 844                         bit = input->mscbit;
 845                         max = MSC_MAX;
 846                         break;
 847
 848                 default:  goto unknown;
 849                 }
 850                 break;
 851
 852         case HID_UP_TELEPHONY:
 853                 switch (usage->hid & HID_USAGE) {
 854                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 855                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 856                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 857                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 858                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 859                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 860                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 861                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 862                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 863                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 864                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 865                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 866                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 867                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 868                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 869                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 870                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 871                 default: goto ignore;
 872                 }
 873                 break;
 874
 875         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 876                 switch (usage->hid & HID_USAGE) {
 877                 case 0x000: goto ignore;
 878                 case 0x030: map_key_clear(KEY_POWER);           break;
 879                 case 0x031: map_key_clear(KEY_RESTART);         break;
 880                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 881                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 882                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 883                 case 0x036: map_key_clear(BTN_MISC);            break;
 884
 885                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 886                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 887                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 888                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 889                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 890                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 891                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 892                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 893                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 894
 895                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 896                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 897                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 898                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 899                 case 0x069: map_key_clear(KEY_RED);             break;
 900                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 901                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 902                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 903                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
 904
 905                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 906                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 907                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 908                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 909                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 910                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 911
 912                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 913                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 914                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 915
 916                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 917                 case 0x083: map_key_clear(KEY_LAST);            break;
 918                 case 0x084: map_key_clear(KEY_ENTER);           break;
 919                 case 0x088: map_key_clear(KEY_PC);              break;
 920                 case 0x089: map_key_clear(KEY_TV);              break;
 921                 case 0x08a: map_key_clear(KEY_WWW);             break;
 922                 case 0x08b: map_key_clear(KEY_DVD);             break;
 923                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 924                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 925                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 926                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 927                 case 0x090: map_key_clear(KEY_MEMO);            break;
 928                 case 0x091: map_key_clear(KEY_CD);              break;
 929                 case 0x092: map_key_clear(KEY_VCR);             break;
 930                 case 0x093: map_key_clear(KEY_TUNER);           break;
 931                 case 0x094: map_key_clear(KEY_EXIT);            break;
 932                 case 0x095: map_key_clear(KEY_HELP);            break;
 933                 case 0x096: map_key_clear(KEY_TAPE);            break;
 934                 case 0x097: map_key_clear(KEY_TV2);             break;
 935                 case 0x098: map_key_clear(KEY_SAT);             break;
 936                 case 0x09a: map_key_clear(KEY_PVR);             break;
 937
 938                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 939                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 940                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 941
 942                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 943                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 944                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 945                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 946                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 947                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 948                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 949                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 950                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 951                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 952                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 953                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 954
 955                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 956                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 957                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 958                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 959                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 960                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 961                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 962                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 963
 964                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 965                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 966                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 967                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 968                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 969                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 970                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 971                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 972                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 973                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 974                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 975                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 976                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 977                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 978                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 979                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 980                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 981                 case 0x192: map_key_clear(KEY_CALC);            break;
 982                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 983                 case 0x194: map_key_clear(KEY_FILE);            break;
 984                 case 0x196: map_key_clear(KEY_WWW);             break;
 985                 case 0x199: map_key_clear(KEY_CHAT);            break;
 986                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 987                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 988                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 989                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 990                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 991                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 992                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 993                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 994                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 995                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 996                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 997                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 998                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 999                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1000                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1001                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1002                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1003                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1004                 case 0x201: map_key_clear(KEY_NEW);             break;
1005                 case 0x202: map_key_clear(KEY_OPEN);            break;
1006                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1007                 case 0x204: map_key_clear(KEY_EXIT);            break;
1008                 case 0x207: map_key_clear(KEY_SAVE);            break;
1009                 case 0x208: map_key_clear(KEY_PRINT);           break;
1010                 case 0x209: map_key_clear(KEY_PROPS);           break;
1011                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1012                 case 0x21b: map_key_clear(KEY_COPY);            break;
1013                 case 0x21c: map_key_clear(KEY_CUT);             break;
1014                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1015                 case 0x21f: map_key_clear(KEY_FIND);            break;
1016                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1017                 case 0x222: map_key_clear(KEY_GOTO);            break;
1018                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1019                 case 0x224: map_key_clear(KEY_BACK);            break;
1020                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1021                 case 0x226: map_key_clear(KEY_STOP);            break;
1022                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1023                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1024                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1025                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1026                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1027                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1028                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1029                 case 0x238: map_rel(REL_HWHEEL);                break;
1030                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1031                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1032                 case 0x269: map_key_clear(KEY_INSERT);          break;
1033                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1034                 case 0x279: map_key_clear(KEY_REDO);            break;
1035
1036                 case 0x289: map_key_clear(KEY_REPLY);           break;
1037                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1038                 case 0x28c: map_key_clear(KEY_SEND);            break;
1039
1040                 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1041
1042                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1043                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1044                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1045                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1046                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1047                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1048
1049                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1050
1051                 default: map_key_clear(KEY_UNKNOWN);
1052                 }
1053                 break;
1054
1055         case HID_UP_GENDEVCTRLS:
1056                 switch (usage->hid) {
1057                 case HID_DC_BATTERYSTRENGTH:
1058                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1059                         usage->type = EV_PWR;
1060                         return;
1061                 }
1062                 goto unknown;
1063
1064         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1065                 set_bit(EV_REP, input->evbit);
1066                 switch (usage->hid & HID_USAGE) {
1067                 case 0x021: map_key_clear(KEY_PRINT);           break;
1068                 case 0x070: map_key_clear(KEY_HP);              break;
1069                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1070                 case 0x072: map_key_clear(KEY_SOUND);           break;
1071                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1072                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1073                 case 0x081: map_key_clear(KEY_CHAT);            break;
1074                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1075                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1076                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1077                 case 0x085: map_key_clear(KEY_SPORT);           break;
1078                 case 0x086: map_key_clear(KEY_SHOP);            break;
1079                 default:    goto ignore;
1080                 }
1081                 break;
1082
1083         case HID_UP_HPVENDOR2:
1084                 set_bit(EV_REP, input->evbit);
1085                 switch (usage->hid & HID_USAGE) {
1086                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1087                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1088                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1089                 default:    goto ignore;
1090                 }
1091                 break;
1092
1093         case HID_UP_MSVENDOR:
1094                 goto ignore;
1095
1096         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1097                 set_bit(EV_REP, input->evbit);
1098                 goto ignore;
1099
1100         case HID_UP_LOGIVENDOR:
1101                 /* intentional fallback */
1102         case HID_UP_LOGIVENDOR2:
1103                 /* intentional fallback */
1104         case HID_UP_LOGIVENDOR3:
1105                 goto ignore;
1106
1107         case HID_UP_PID:
1108                 switch (usage->hid & HID_USAGE) {
1109                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1110                 default: goto ignore;
1111                 }
1112                 break;
1113
1114         default:
1115         unknown:
1116                 if (field->report_size == 1) {
1117                         if (field->report->type == HID_OUTPUT_REPORT) {
1118                                 map_led(LED_MISC);
1119                                 break;
1120                         }
1121                         map_key(BTN_MISC);
1122                         break;
1123                 }
1124                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1125                         map_rel(REL_MISC);
1126                         break;
1127                 }
1128                 map_abs(ABS_MISC);
1129                 break;
1130         }
1131
1132 mapped:
1133         /* Mapping failed, bail out */
1134         if (!bit)
1135                 return;
1136
1137         if (device->driver->input_mapped &&
1138             device->driver->input_mapped(device, hidinput, field, usage,
1139                                          &bit, &max) < 0) {
1140                 /*
1141                  * The driver indicated that no further generic handling
1142                  * of the usage is desired.
1143                  */
1144                 return;
1145         }
1146
1147         set_bit(usage->type, input->evbit);
1148
1149         /*
1150          * This part is *really* controversial:
1151          * - HID aims at being generic so we should do our best to export
1152          *   all incoming events
1153          * - HID describes what events are, so there is no reason for ABS_X
1154          *   to be mapped to ABS_Y
1155          * - HID is using *_MISC+N as a default value, but nothing prevents
1156          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1157          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1158          *   processing)
1159          *
1160          * If devices still want to use this (at their own risk), they will
1161          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1162          * the default should be a reliable mapping.
1163          */
1164         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1165                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1166                         usage->code = find_next_zero_bit(bit,
1167                                                          max + 1,
1168                                                          usage->code);
1169                 } else {
1170                         device->status |= HID_STAT_DUP_DETECTED;
1171                         goto ignore;
1172                 }
1173         }
1174
1175         if (usage->code > max)
1176                 goto ignore;
1177
1178         if (usage->type == EV_ABS) {
1179
1180                 int a = field->logical_minimum;
1181                 int b = field->logical_maximum;
1182
1183                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1184                         a = field->logical_minimum = 0;
1185                         b = field->logical_maximum = 255;
1186                 }
1187
1188                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1189                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1190                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1191
1192                 input_abs_set_res(input, usage->code,
1193                                   hidinput_calc_abs_res(field, usage->code));
1194
1195                 /* use a larger default input buffer for MT devices */
1196                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1197                         input_set_events_per_packet(input, 60);
1198         }
1199
1200         if (usage->type == EV_ABS &&
1201             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1202                 int i;
1203                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1204                         input_set_abs_params(input, i, -1, 1, 0, 0);
1205                         set_bit(i, input->absbit);
1206                 }
1207                 if (usage->hat_dir && !field->dpad)
1208                         field->dpad = usage->code;
1209         }
1210
1211         /* for those devices which produce Consumer volume usage as relative,
1212          * we emulate pressing volumeup/volumedown appropriate number of times
1213          * in hidinput_hid_event()
1214          */
1215         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1216                         (usage->code == ABS_VOLUME)) {
1217                 set_bit(KEY_VOLUMEUP, input->keybit);
1218                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1219         }
1220
1221         if (usage->type == EV_KEY) {
1222                 set_bit(EV_MSC, input->evbit);
1223                 set_bit(MSC_SCAN, input->mscbit);
1224         }
1225
1226         return;
1227
1228 ignore:
1229         usage->type = 0;
1230         usage->code = 0;
1231 }
1232
1233 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1234 {
1235         struct input_dev *input;
1236         unsigned *quirks = &hid->quirks;
1237
1238         if (!usage->type)
1239                 return;
1240
1241         if (usage->type == EV_PWR) {
1242                 hidinput_update_battery(hid, value);
1243                 return;
1244         }
1245
1246         if (!field->hidinput)
1247                 return;
1248
1249         input = field->hidinput->input;
1250
1251         if (usage->type == EV_ABS &&
1252             (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1253              ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
1254                 value = field->logical_maximum - value;
1255         }
1256
1257         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1258                 int hat_dir = usage->hat_dir;
1259                 if (!hat_dir)
1260                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1261                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1262                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1263                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1264                 return;
1265         }
1266
1267         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1268                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1269                 return;
1270         }
1271
1272         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1273                 if (value) {
1274                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1275                         return;
1276                 }
1277                 input_event(input, usage->type, usage->code, 0);
1278                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1279                 return;
1280         }
1281
1282         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1283                 int a = field->logical_minimum;
1284                 int b = field->logical_maximum;
1285                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1286         }
1287
1288         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1289                 dbg_hid("Maximum Effects - %d\n",value);
1290                 return;
1291         }
1292
1293         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1294                 dbg_hid("PID Pool Report\n");
1295                 return;
1296         }
1297
1298         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1299                 return;
1300
1301         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1302                         (usage->code == ABS_VOLUME)) {
1303                 int count = abs(value);
1304                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1305                 int i;
1306
1307                 for (i = 0; i < count; i++) {
1308                         input_event(input, EV_KEY, direction, 1);
1309                         input_sync(input);
1310                         input_event(input, EV_KEY, direction, 0);
1311                         input_sync(input);
1312                 }
1313                 return;
1314         }
1315
1316         /*
1317          * Ignore out-of-range values as per HID specification,
1318          * section 5.10 and 6.2.25, when NULL state bit is present.
1319          * When it's not, clamp the value to match Microsoft's input
1320          * driver as mentioned in "Required HID usages for digitizers":
1321          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1322          *
1323          * The logical_minimum < logical_maximum check is done so that we
1324          * don't unintentionally discard values sent by devices which
1325          * don't specify logical min and max.
1326          */
1327         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1328             (field->logical_minimum < field->logical_maximum)) {
1329                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1330                     (value < field->logical_minimum ||
1331                      value > field->logical_maximum)) {
1332                         dbg_hid("Ignoring out-of-range value %x\n", value);
1333                         return;
1334                 }
1335                 value = clamp(value,
1336                               field->logical_minimum,
1337                               field->logical_maximum);
1338         }
1339
1340         /*
1341          * Ignore reports for absolute data if the data didn't change. This is
1342          * not only an optimization but also fixes 'dead' key reports. Some
1343          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1344          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1345          * can only have one of them physically available. The 'dead' keys
1346          * report constant 0. As all map to the same keycode, they'd confuse
1347          * the input layer. If we filter the 'dead' keys on the HID level, we
1348          * skip the keycode translation and only forward real events.
1349          */
1350         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1351                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1352                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1353             usage->usage_index < field->maxusage &&
1354             value == field->value[usage->usage_index])
1355                 return;
1356
1357         /* report the usage code as scancode if the key status has changed */
1358         if (usage->type == EV_KEY &&
1359             (!test_bit(usage->code, input->key)) == value)
1360                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1361
1362         input_event(input, usage->type, usage->code, value);
1363
1364         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1365             usage->type == EV_KEY && value) {
1366                 input_sync(input);
1367                 input_event(input, usage->type, usage->code, 0);
1368         }
1369 }
1370
1371 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1372 {
1373         struct hid_input *hidinput;
1374
1375         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1376                 return;
1377
1378         list_for_each_entry(hidinput, &hid->inputs, list)
1379                 input_sync(hidinput->input);
1380 }
1381 EXPORT_SYMBOL_GPL(hidinput_report_event);
1382
1383 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1384 {
1385         struct hid_report *report;
1386         int i, j;
1387
1388         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1389                 for (i = 0; i < report->maxfield; i++) {
1390                         *field = report->field[i];
1391                         for (j = 0; j < (*field)->maxusage; j++)
1392                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1393                                         return j;
1394                 }
1395         }
1396         return -1;
1397 }
1398 EXPORT_SYMBOL_GPL(hidinput_find_field);
1399
1400 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1401 {
1402         struct hid_report *report;
1403         struct hid_field *field;
1404         int i, j;
1405
1406         list_for_each_entry(report,
1407                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1408                             list) {
1409                 for (i = 0; i < report->maxfield; i++) {
1410                         field = report->field[i];
1411                         for (j = 0; j < field->maxusage; j++)
1412                                 if (field->usage[j].type == EV_LED)
1413                                         return field;
1414                 }
1415         }
1416         return NULL;
1417 }
1418 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1419
1420 unsigned int hidinput_count_leds(struct hid_device *hid)
1421 {
1422         struct hid_report *report;
1423         struct hid_field *field;
1424         int i, j;
1425         unsigned int count = 0;
1426
1427         list_for_each_entry(report,
1428                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1429                             list) {
1430                 for (i = 0; i < report->maxfield; i++) {
1431                         field = report->field[i];
1432                         for (j = 0; j < field->maxusage; j++)
1433                                 if (field->usage[j].type == EV_LED &&
1434                                     field->value[j])
1435                                         count += 1;
1436                 }
1437         }
1438         return count;
1439 }
1440 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1441
1442 static void hidinput_led_worker(struct work_struct *work)
1443 {
1444         struct hid_device *hid = container_of(work, struct hid_device,
1445                                               led_work);
1446         struct hid_field *field;
1447         struct hid_report *report;
1448         int ret;
1449         u32 len;
1450         __u8 *buf;
1451
1452         field = hidinput_get_led_field(hid);
1453         if (!field)
1454                 return;
1455
1456         /*
1457          * field->report is accessed unlocked regarding HID core. So there might
1458          * be another incoming SET-LED request from user-space, which changes
1459          * the LED state while we assemble our outgoing buffer. However, this
1460          * doesn't matter as hid_output_report() correctly converts it into a
1461          * boolean value no matter what information is currently set on the LED
1462          * field (even garbage). So the remote device will always get a valid
1463          * request.
1464          * And in case we send a wrong value, a next led worker is spawned
1465          * for every SET-LED request so the following worker will send the
1466          * correct value, guaranteed!
1467          */
1468
1469         report = field->report;
1470
1471         /* use custom SET_REPORT request if possible (asynchronous) */
1472         if (hid->ll_driver->request)
1473                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1474
1475         /* fall back to generic raw-output-report */
1476         len = hid_report_len(report);
1477         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1478         if (!buf)
1479                 return;
1480
1481         hid_output_report(report, buf);
1482         /* synchronous output report */
1483         ret = hid_hw_output_report(hid, buf, len);
1484         if (ret == -ENOSYS)
1485                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1486                                 HID_REQ_SET_REPORT);
1487         kfree(buf);
1488 }
1489
1490 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1491                                 unsigned int code, int value)
1492 {
1493         struct hid_device *hid = input_get_drvdata(dev);
1494         struct hid_field *field;
1495         int offset;
1496
1497         if (type == EV_FF)
1498                 return input_ff_event(dev, type, code, value);
1499
1500         if (type != EV_LED)
1501                 return -1;
1502
1503         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1504                 hid_warn(dev, "event field not found\n");
1505                 return -1;
1506         }
1507
1508         hid_set_field(field, offset, value);
1509
1510         schedule_work(&hid->led_work);
1511         return 0;
1512 }
1513
1514 static int hidinput_open(struct input_dev *dev)
1515 {
1516         struct hid_device *hid = input_get_drvdata(dev);
1517
1518         return hid_hw_open(hid);
1519 }
1520
1521 static void hidinput_close(struct input_dev *dev)
1522 {
1523         struct hid_device *hid = input_get_drvdata(dev);
1524
1525         hid_hw_close(hid);
1526 }
1527
1528 static void report_features(struct hid_device *hid)
1529 {
1530         struct hid_driver *drv = hid->driver;
1531         struct hid_report_enum *rep_enum;
1532         struct hid_report *rep;
1533         struct hid_usage *usage;
1534         int i, j;
1535
1536         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1537         list_for_each_entry(rep, &rep_enum->report_list, list)
1538                 for (i = 0; i < rep->maxfield; i++) {
1539                         /* Ignore if report count is out of bounds. */
1540                         if (rep->field[i]->report_count < 1)
1541                                 continue;
1542
1543                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1544                                 usage = &rep->field[i]->usage[j];
1545
1546                                 /* Verify if Battery Strength feature is available */
1547                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1548                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1549                                                                rep->field[i]);
1550
1551                                 if (drv->feature_mapping)
1552                                         drv->feature_mapping(hid, rep->field[i], usage);
1553                         }
1554                 }
1555 }
1556
1557 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1558                                            unsigned int application)
1559 {
1560         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1561         struct input_dev *input_dev = input_allocate_device();
1562         const char *suffix = NULL;
1563
1564         if (!hidinput || !input_dev)
1565                 goto fail;
1566
1567         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1568             hid->maxapplication > 1) {
1569                 switch (application) {
1570                 case HID_GD_KEYBOARD:
1571                         suffix = "Keyboard";
1572                         break;
1573                 case HID_GD_KEYPAD:
1574                         suffix = "Keypad";
1575                         break;
1576                 case HID_GD_MOUSE:
1577                         suffix = "Mouse";
1578                         break;
1579                 case HID_DG_STYLUS:
1580                         suffix = "Pen";
1581                         break;
1582                 case HID_DG_TOUCHSCREEN:
1583                         suffix = "Touchscreen";
1584                         break;
1585                 case HID_DG_TOUCHPAD:
1586                         suffix = "Touchpad";
1587                         break;
1588                 case HID_GD_SYSTEM_CONTROL:
1589                         suffix = "System Control";
1590                         break;
1591                 case HID_CP_CONSUMER_CONTROL:
1592                         suffix = "Consumer Control";
1593                         break;
1594                 case HID_GD_WIRELESS_RADIO_CTLS:
1595                         suffix = "Wireless Radio Control";
1596                         break;
1597                 case HID_GD_SYSTEM_MULTIAXIS:
1598                         suffix = "System Multi Axis";
1599                         break;
1600                 default:
1601                         break;
1602                 }
1603         }
1604
1605         if (suffix) {
1606                 hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1607                                            hid->name, suffix);
1608                 if (!hidinput->name)
1609                         goto fail;
1610         }
1611
1612         input_set_drvdata(input_dev, hid);
1613         input_dev->event = hidinput_input_event;
1614         input_dev->open = hidinput_open;
1615         input_dev->close = hidinput_close;
1616         input_dev->setkeycode = hidinput_setkeycode;
1617         input_dev->getkeycode = hidinput_getkeycode;
1618
1619         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1620         input_dev->phys = hid->phys;
1621         input_dev->uniq = hid->uniq;
1622         input_dev->id.bustype = hid->bus;
1623         input_dev->id.vendor  = hid->vendor;
1624         input_dev->id.product = hid->product;
1625         input_dev->id.version = hid->version;
1626         input_dev->dev.parent = &hid->dev;
1627
1628         hidinput->input = input_dev;
1629         hidinput->application = application;
1630         list_add_tail(&hidinput->list, &hid->inputs);
1631
1632         INIT_LIST_HEAD(&hidinput->reports);
1633
1634         return hidinput;
1635
1636 fail:
1637         kfree(hidinput);
1638         input_free_device(input_dev);
1639         hid_err(hid, "Out of memory during hid input probe\n");
1640         return NULL;
1641 }
1642
1643 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1644 {
1645         int i;
1646         unsigned long r = 0;
1647
1648         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1649                 r |= hidinput->input->evbit[i];
1650
1651         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1652                 r |= hidinput->input->keybit[i];
1653
1654         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1655                 r |= hidinput->input->relbit[i];
1656
1657         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1658                 r |= hidinput->input->absbit[i];
1659
1660         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1661                 r |= hidinput->input->mscbit[i];
1662
1663         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1664                 r |= hidinput->input->ledbit[i];
1665
1666         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1667                 r |= hidinput->input->sndbit[i];
1668
1669         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1670                 r |= hidinput->input->ffbit[i];
1671
1672         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1673                 r |= hidinput->input->swbit[i];
1674
1675         return !!r;
1676 }
1677
1678 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1679                 struct hid_input *hidinput)
1680 {
1681         struct hid_report *report;
1682         int i, k;
1683
1684         list_del(&hidinput->list);
1685         input_free_device(hidinput->input);
1686         kfree(hidinput->name);
1687
1688         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1689                 if (k == HID_OUTPUT_REPORT &&
1690                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1691                         continue;
1692
1693                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1694                                     list) {
1695
1696                         for (i = 0; i < report->maxfield; i++)
1697                                 if (report->field[i]->hidinput == hidinput)
1698                                         report->field[i]->hidinput = NULL;
1699                 }
1700         }
1701
1702         kfree(hidinput);
1703 }
1704
1705 static struct hid_input *hidinput_match(struct hid_report *report)
1706 {
1707         struct hid_device *hid = report->device;
1708         struct hid_input *hidinput;
1709
1710         list_for_each_entry(hidinput, &hid->inputs, list) {
1711                 if (hidinput->report &&
1712                     hidinput->report->id == report->id)
1713                         return hidinput;
1714         }
1715
1716         return NULL;
1717 }
1718
1719 static struct hid_input *hidinput_match_application(struct hid_report *report)
1720 {
1721         struct hid_device *hid = report->device;
1722         struct hid_input *hidinput;
1723
1724         list_for_each_entry(hidinput, &hid->inputs, list) {
1725                 if (hidinput->application == report->application)
1726                         return hidinput;
1727         }
1728
1729         return NULL;
1730 }
1731
1732 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1733                                              struct hid_report *report)
1734 {
1735         int i, j;
1736
1737         for (i = 0; i < report->maxfield; i++)
1738                 for (j = 0; j < report->field[i]->maxusage; j++)
1739                         hidinput_configure_usage(hidinput, report->field[i],
1740                                                  report->field[i]->usage + j);
1741 }
1742
1743 /*
1744  * Register the input device; print a message.
1745  * Configure the input layer interface
1746  * Read all reports and initialize the absolute field values.
1747  */
1748
1749 int hidinput_connect(struct hid_device *hid, unsigned int force)
1750 {
1751         struct hid_driver *drv = hid->driver;
1752         struct hid_report *report;
1753         struct hid_input *next, *hidinput = NULL;
1754         unsigned int application;
1755         int i, k;
1756
1757         INIT_LIST_HEAD(&hid->inputs);
1758         INIT_WORK(&hid->led_work, hidinput_led_worker);
1759
1760         hid->status &= ~HID_STAT_DUP_DETECTED;
1761
1762         if (!force) {
1763                 for (i = 0; i < hid->maxcollection; i++) {
1764                         struct hid_collection *col = &hid->collection[i];
1765                         if (col->type == HID_COLLECTION_APPLICATION ||
1766                                         col->type == HID_COLLECTION_PHYSICAL)
1767                                 if (IS_INPUT_APPLICATION(col->usage))
1768                                         break;
1769                 }
1770
1771                 if (i == hid->maxcollection)
1772                         return -1;
1773         }
1774
1775         report_features(hid);
1776
1777         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1778                 if (k == HID_OUTPUT_REPORT &&
1779                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1780                         continue;
1781
1782                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1783
1784                         if (!report->maxfield)
1785                                 continue;
1786
1787                         application = report->application;
1788
1789                         /*
1790                          * Find the previous hidinput report attached
1791                          * to this report id.
1792                          */
1793                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1794                                 hidinput = hidinput_match(report);
1795                         else if (hid->maxapplication > 1 &&
1796                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1797                                 hidinput = hidinput_match_application(report);
1798
1799                         if (!hidinput) {
1800                                 hidinput = hidinput_allocate(hid, application);
1801                                 if (!hidinput)
1802                                         goto out_unwind;
1803                         }
1804
1805                         hidinput_configure_usages(hidinput, report);
1806
1807                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1808                                 hidinput->report = report;
1809
1810                         list_add_tail(&report->hidinput_list,
1811                                       &hidinput->reports);
1812                 }
1813         }
1814
1815         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1816                 if (drv->input_configured &&
1817                     drv->input_configured(hid, hidinput))
1818                         goto out_unwind;
1819
1820                 if (!hidinput_has_been_populated(hidinput)) {
1821                         /* no need to register an input device not populated */
1822                         hidinput_cleanup_hidinput(hid, hidinput);
1823                         continue;
1824                 }
1825
1826                 if (input_register_device(hidinput->input))
1827                         goto out_unwind;
1828                 hidinput->registered = true;
1829         }
1830
1831         if (list_empty(&hid->inputs)) {
1832                 hid_err(hid, "No inputs registered, leaving\n");
1833                 goto out_unwind;
1834         }
1835
1836         if (hid->status & HID_STAT_DUP_DETECTED)
1837                 hid_dbg(hid,
1838                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1839
1840         return 0;
1841
1842 out_unwind:
1843         /* unwind the ones we already registered */
1844         hidinput_disconnect(hid);
1845
1846         return -1;
1847 }
1848 EXPORT_SYMBOL_GPL(hidinput_connect);
1849
1850 void hidinput_disconnect(struct hid_device *hid)
1851 {
1852         struct hid_input *hidinput, *next;
1853
1854         hidinput_cleanup_battery(hid);
1855
1856         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1857                 list_del(&hidinput->list);
1858                 if (hidinput->registered)
1859                         input_unregister_device(hidinput->input);
1860                 else
1861                         input_free_device(hidinput->input);
1862                 kfree(hidinput->name);
1863                 kfree(hidinput);
1864         }
1865
1866         /* led_work is spawned by input_dev callbacks, but doesn't access the
1867          * parent input_dev at all. Once all input devices are removed, we
1868          * know that led_work will never get restarted, so we can cancel it
1869          * synchronously and are safe. */
1870         cancel_work_sync(&hid->led_work);
1871 }
1872 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1873