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         {}
 332 };
 333
 334 static unsigned find_battery_quirk(struct hid_device *hdev)
 335 {
 336         unsigned quirks = 0;
 337         const struct hid_device_id *match;
 338
 339         match = hid_match_id(hdev, hid_battery_quirks);
 340         if (match != NULL)
 341                 quirks = match->driver_data;
 342
 343         return quirks;
 344 }
 345
 346 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 347                                            int value)
 348 {
 349         if (dev->battery_min < dev->battery_max &&
 350             value >= dev->battery_min && value <= dev->battery_max)
 351                 value = ((value - dev->battery_min) * 100) /
 352                         (dev->battery_max - dev->battery_min);
 353
 354         return value;
 355 }
 356
 357 static int hidinput_query_battery_capacity(struct hid_device *dev)
 358 {
 359         u8 *buf;
 360         int ret;
 361
 362         buf = kmalloc(2, GFP_KERNEL);
 363         if (!buf)
 364                 return -ENOMEM;
 365
 366         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 367                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 368         if (ret != 2) {
 369                 kfree(buf);
 370                 return -ENODATA;
 371         }
 372
 373         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 374         kfree(buf);
 375         return ret;
 376 }
 377
 378 static int hidinput_get_battery_property(struct power_supply *psy,
 379                                          enum power_supply_property prop,
 380                                          union power_supply_propval *val)
 381 {
 382         struct hid_device *dev = power_supply_get_drvdata(psy);
 383         int value;
 384         int ret = 0;
 385
 386         switch (prop) {
 387         case POWER_SUPPLY_PROP_PRESENT:
 388         case POWER_SUPPLY_PROP_ONLINE:
 389                 val->intval = 1;
 390                 break;
 391
 392         case POWER_SUPPLY_PROP_CAPACITY:
 393                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 394                     !dev->battery_avoid_query) {
 395                         value = hidinput_query_battery_capacity(dev);
 396                         if (value < 0)
 397                                 return value;
 398                 } else  {
 399                         value = dev->battery_capacity;
 400                 }
 401
 402                 val->intval = value;
 403                 break;
 404
 405         case POWER_SUPPLY_PROP_MODEL_NAME:
 406                 val->strval = dev->name;
 407                 break;
 408
 409         case POWER_SUPPLY_PROP_STATUS:
 410                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 411                     !dev->battery_avoid_query) {
 412                         value = hidinput_query_battery_capacity(dev);
 413                         if (value < 0)
 414                                 return value;
 415
 416                         dev->battery_capacity = value;
 417                         dev->battery_status = HID_BATTERY_QUERIED;
 418                 }
 419
 420                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 421                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 422                 else if (dev->battery_capacity == 100)
 423                         val->intval = POWER_SUPPLY_STATUS_FULL;
 424                 else
 425                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 426                 break;
 427
 428         case POWER_SUPPLY_PROP_SCOPE:
 429                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 430                 break;
 431
 432         default:
 433                 ret = -EINVAL;
 434                 break;
 435         }
 436
 437         return ret;
 438 }
 439
 440 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 441 {
 442         struct power_supply_desc *psy_desc;
 443         struct power_supply_config psy_cfg = { .drv_data = dev, };
 444         unsigned quirks;
 445         s32 min, max;
 446         int error;
 447
 448         if (dev->battery)
 449                 return 0;       /* already initialized? */
 450
 451         quirks = find_battery_quirk(dev);
 452
 453         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 454                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 455
 456         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 457                 return 0;
 458
 459         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 460         if (!psy_desc)
 461                 return -ENOMEM;
 462
 463         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 464                                    strlen(dev->uniq) ?
 465                                         dev->uniq : dev_name(&dev->dev));
 466         if (!psy_desc->name) {
 467                 error = -ENOMEM;
 468                 goto err_free_mem;
 469         }
 470
 471         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 472         psy_desc->properties = hidinput_battery_props;
 473         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 474         psy_desc->use_for_apm = 0;
 475         psy_desc->get_property = hidinput_get_battery_property;
 476
 477         min = field->logical_minimum;
 478         max = field->logical_maximum;
 479
 480         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 481                 min = 0;
 482                 max = 100;
 483         }
 484
 485         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 486                 report_type = HID_FEATURE_REPORT;
 487
 488         dev->battery_min = min;
 489         dev->battery_max = max;
 490         dev->battery_report_type = report_type;
 491         dev->battery_report_id = field->report->id;
 492
 493         /*
 494          * Stylus is normally not connected to the device and thus we
 495          * can't query the device and get meaningful battery strength.
 496          * We have to wait for the device to report it on its own.
 497          */
 498         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 499                                    field->physical == HID_DG_STYLUS;
 500
 501         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 502         if (IS_ERR(dev->battery)) {
 503                 error = PTR_ERR(dev->battery);
 504                 hid_warn(dev, "can't register power supply: %d\n", error);
 505                 goto err_free_name;
 506         }
 507
 508         power_supply_powers(dev->battery, &dev->dev);
 509         return 0;
 510
 511 err_free_name:
 512         kfree(psy_desc->name);
 513 err_free_mem:
 514         kfree(psy_desc);
 515         dev->battery = NULL;
 516         return error;
 517 }
 518
 519 static void hidinput_cleanup_battery(struct hid_device *dev)
 520 {
 521         const struct power_supply_desc *psy_desc;
 522
 523         if (!dev->battery)
 524                 return;
 525
 526         psy_desc = dev->battery->desc;
 527         power_supply_unregister(dev->battery);
 528         kfree(psy_desc->name);
 529         kfree(psy_desc);
 530         dev->battery = NULL;
 531 }
 532
 533 static void hidinput_update_battery(struct hid_device *dev, int value)
 534 {
 535         int capacity;
 536
 537         if (!dev->battery)
 538                 return;
 539
 540         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 541                 return;
 542
 543         capacity = hidinput_scale_battery_capacity(dev, value);
 544
 545         if (dev->battery_status != HID_BATTERY_REPORTED ||
 546             capacity != dev->battery_capacity) {
 547                 dev->battery_capacity = capacity;
 548                 dev->battery_status = HID_BATTERY_REPORTED;
 549                 power_supply_changed(dev->battery);
 550         }
 551 }
 552 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 553 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 554                                   struct hid_field *field)
 555 {
 556         return 0;
 557 }
 558
 559 static void hidinput_cleanup_battery(struct hid_device *dev)
 560 {
 561 }
 562
 563 static void hidinput_update_battery(struct hid_device *dev, int value)
 564 {
 565 }
 566 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 567
 568 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 569                                      struct hid_usage *usage)
 570 {
 571         struct input_dev *input = hidinput->input;
 572         struct hid_device *device = input_get_drvdata(input);
 573         int max = 0, code;
 574         unsigned long *bit = NULL;
 575
 576         field->hidinput = hidinput;
 577
 578         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 579                 goto ignore;
 580
 581         /* Ignore if report count is out of bounds. */
 582         if (field->report_count < 1)
 583                 goto ignore;
 584
 585         /* only LED usages are supported in output fields */
 586         if (field->report_type == HID_OUTPUT_REPORT &&
 587                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 588                 goto ignore;
 589         }
 590
 591         if (device->driver->input_mapping) {
 592                 int ret = device->driver->input_mapping(device, hidinput, field,
 593                                 usage, &bit, &max);
 594                 if (ret > 0)
 595                         goto mapped;
 596                 if (ret < 0)
 597                         goto ignore;
 598         }
 599
 600         switch (usage->hid & HID_USAGE_PAGE) {
 601         case HID_UP_UNDEFINED:
 602                 goto ignore;
 603
 604         case HID_UP_KEYBOARD:
 605                 set_bit(EV_REP, input->evbit);
 606
 607                 if ((usage->hid & HID_USAGE) < 256) {
 608                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 609                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 610                 } else
 611                         map_key(KEY_UNKNOWN);
 612
 613                 break;
 614
 615         case HID_UP_BUTTON:
 616                 code = ((usage->hid - 1) & HID_USAGE);
 617
 618                 switch (field->application) {
 619                 case HID_GD_MOUSE:
 620                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 621                 case HID_GD_JOYSTICK:
 622                                 if (code <= 0xf)
 623                                         code += BTN_JOYSTICK;
 624                                 else
 625                                         code += BTN_TRIGGER_HAPPY - 0x10;
 626                                 break;
 627                 case HID_GD_GAMEPAD:
 628                                 if (code <= 0xf)
 629                                         code += BTN_GAMEPAD;
 630                                 else
 631                                         code += BTN_TRIGGER_HAPPY - 0x10;
 632                                 break;
 633                 default:
 634                         switch (field->physical) {
 635                         case HID_GD_MOUSE:
 636                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 637                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 638                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 639                         default:              code += BTN_MISC;
 640                         }
 641                 }
 642
 643                 map_key(code);
 644                 break;
 645
 646         case HID_UP_SIMULATION:
 647                 switch (usage->hid & 0xffff) {
 648                 case 0xba: map_abs(ABS_RUDDER);   break;
 649                 case 0xbb: map_abs(ABS_THROTTLE); break;
 650                 case 0xc4: map_abs(ABS_GAS);      break;
 651                 case 0xc5: map_abs(ABS_BRAKE);    break;
 652                 case 0xc8: map_abs(ABS_WHEEL);    break;
 653                 default:   goto ignore;
 654                 }
 655                 break;
 656
 657         case HID_UP_GENDESK:
 658                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 659                         switch (usage->hid & 0xf) {
 660                         case 0x1: map_key_clear(KEY_POWER);  break;
 661                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 662                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 663                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 664                         case 0x5: map_key_clear(KEY_MENU); break;
 665                         case 0x6: map_key_clear(KEY_PROG1); break;
 666                         case 0x7: map_key_clear(KEY_HELP); break;
 667                         case 0x8: map_key_clear(KEY_EXIT); break;
 668                         case 0x9: map_key_clear(KEY_SELECT); break;
 669                         case 0xa: map_key_clear(KEY_RIGHT); break;
 670                         case 0xb: map_key_clear(KEY_LEFT); break;
 671                         case 0xc: map_key_clear(KEY_UP); break;
 672                         case 0xd: map_key_clear(KEY_DOWN); break;
 673                         case 0xe: map_key_clear(KEY_POWER2); break;
 674                         case 0xf: map_key_clear(KEY_RESTART); break;
 675                         default: goto unknown;
 676                         }
 677                         break;
 678                 }
 679
 680                 /*
 681                  * Some lazy vendors declare 255 usages for System Control,
 682                  * leading to the creation of ABS_X|Y axis and too many others.
 683                  * It wouldn't be a problem if joydev doesn't consider the
 684                  * device as a joystick then.
 685                  */
 686                 if (field->application == HID_GD_SYSTEM_CONTROL)
 687                         goto ignore;
 688
 689                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 690                         switch (usage->hid) {
 691                         case HID_GD_UP:    usage->hat_dir = 1; break;
 692                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 693                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 694                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 695                         default: goto unknown;
 696                         }
 697                         if (field->dpad) {
 698                                 map_abs(field->dpad);
 699                                 goto ignore;
 700                         }
 701                         map_abs(ABS_HAT0X);
 702                         break;
 703                 }
 704
 705                 switch (usage->hid) {
 706                 /* These usage IDs map directly to the usage codes. */
 707                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 708                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 709                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 710                                 map_rel(usage->hid & 0xf);
 711                         else
 712                                 map_abs_clear(usage->hid & 0xf);
 713                         break;
 714
 715                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 716                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 717                                 map_rel(usage->hid & 0xf);
 718                         else
 719                                 map_abs(usage->hid & 0xf);
 720                         break;
 721
 722                 case HID_GD_HATSWITCH:
 723                         usage->hat_min = field->logical_minimum;
 724                         usage->hat_max = field->logical_maximum;
 725                         map_abs(ABS_HAT0X);
 726                         break;
 727
 728                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 729                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 730
 731                 case HID_GD_RFKILL_BTN:
 732                         /* MS wireless radio ctl extension, also check CA */
 733                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 734                                 map_key_clear(KEY_RFKILL);
 735                                 /* We need to simulate the btn release */
 736                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 737                                 break;
 738                         }
 739
 740                 default: goto unknown;
 741                 }
 742
 743                 break;
 744
 745         case HID_UP_LED:
 746                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 747                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 748                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 749                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 750                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 751                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 752                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 753                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 754                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 755                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 756                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 757                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 758
 759                 default: goto ignore;
 760                 }
 761                 break;
 762
 763         case HID_UP_DIGITIZER:
 764                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 765                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 766                 else if ((field->application & 0xff) == 0x02) /* Pen */
 767                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 768
 769                 switch (usage->hid & 0xff) {
 770                 case 0x00: /* Undefined */
 771                         goto ignore;
 772
 773                 case 0x30: /* TipPressure */
 774                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 775                                 device->quirks |= HID_QUIRK_NOTOUCH;
 776                                 set_bit(EV_KEY, input->evbit);
 777                                 set_bit(BTN_TOUCH, input->keybit);
 778                         }
 779                         map_abs_clear(ABS_PRESSURE);
 780                         break;
 781
 782                 case 0x32: /* InRange */
 783                         switch (field->physical & 0xff) {
 784                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 785                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 786                         default: map_key(BTN_TOOL_PEN); break;
 787                         }
 788                         break;
 789
 790                 case 0x3b: /* Battery Strength */
 791                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 792                         usage->type = EV_PWR;
 793                         goto ignore;
 794
 795                 case 0x3c: /* Invert */
 796                         map_key_clear(BTN_TOOL_RUBBER);
 797                         break;
 798
 799                 case 0x3d: /* X Tilt */
 800                         map_abs_clear(ABS_TILT_X);
 801                         break;
 802
 803                 case 0x3e: /* Y Tilt */
 804                         map_abs_clear(ABS_TILT_Y);
 805                         break;
 806
 807                 case 0x33: /* Touch */
 808                 case 0x42: /* TipSwitch */
 809                 case 0x43: /* TipSwitch2 */
 810                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 811                         map_key_clear(BTN_TOUCH);
 812                         break;
 813
 814                 case 0x44: /* BarrelSwitch */
 815                         map_key_clear(BTN_STYLUS);
 816                         break;
 817
 818                 case 0x45: /* ERASER */
 819                         /*
 820                          * This event is reported when eraser tip touches the surface.
 821                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 822                          * tool gets in proximity.
 823                          */
 824                         map_key_clear(BTN_TOUCH);
 825                         break;
 826
 827                 case 0x46: /* TabletPick */
 828                 case 0x5a: /* SecondaryBarrelSwitch */
 829                         map_key_clear(BTN_STYLUS2);
 830                         break;
 831
 832                 case 0x5b: /* TransducerSerialNumber */
 833                         usage->type = EV_MSC;
 834                         usage->code = MSC_SERIAL;
 835                         bit = input->mscbit;
 836                         max = MSC_MAX;
 837                         break;
 838
 839                 default:  goto unknown;
 840                 }
 841                 break;
 842
 843         case HID_UP_TELEPHONY:
 844                 switch (usage->hid & HID_USAGE) {
 845                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 846                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 847                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 848                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 849                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 850                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 851                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 852                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 853                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 854                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 855                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 856                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 857                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 858                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 859                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 860                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 861                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 862                 default: goto ignore;
 863                 }
 864                 break;
 865
 866         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 867                 switch (usage->hid & HID_USAGE) {
 868                 case 0x000: goto ignore;
 869                 case 0x030: map_key_clear(KEY_POWER);           break;
 870                 case 0x031: map_key_clear(KEY_RESTART);         break;
 871                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 872                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 873                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 874                 case 0x036: map_key_clear(BTN_MISC);            break;
 875
 876                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 877                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 878                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 879                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 880                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 881                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 882                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 883                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 884                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 885
 886                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 887                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 888                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 889                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 890                 case 0x069: map_key_clear(KEY_RED);             break;
 891                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 892                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 893                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 894                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
 895
 896                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 897                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 898                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 899                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 900                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 901                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 902
 903                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 904                 case 0x083: map_key_clear(KEY_LAST);            break;
 905                 case 0x084: map_key_clear(KEY_ENTER);           break;
 906                 case 0x088: map_key_clear(KEY_PC);              break;
 907                 case 0x089: map_key_clear(KEY_TV);              break;
 908                 case 0x08a: map_key_clear(KEY_WWW);             break;
 909                 case 0x08b: map_key_clear(KEY_DVD);             break;
 910                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 911                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 912                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 913                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 914                 case 0x090: map_key_clear(KEY_MEMO);            break;
 915                 case 0x091: map_key_clear(KEY_CD);              break;
 916                 case 0x092: map_key_clear(KEY_VCR);             break;
 917                 case 0x093: map_key_clear(KEY_TUNER);           break;
 918                 case 0x094: map_key_clear(KEY_EXIT);            break;
 919                 case 0x095: map_key_clear(KEY_HELP);            break;
 920                 case 0x096: map_key_clear(KEY_TAPE);            break;
 921                 case 0x097: map_key_clear(KEY_TV2);             break;
 922                 case 0x098: map_key_clear(KEY_SAT);             break;
 923                 case 0x09a: map_key_clear(KEY_PVR);             break;
 924
 925                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 926                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 927                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 928
 929                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 930                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 931                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 932                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 933                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 934                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 935                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 936                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 937                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 938                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 939                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 940                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 941
 942                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 943                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 944                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 945                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 946                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 947                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 948                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 949                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 950
 951                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 952                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 953                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 954                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 955                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 956                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 957                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 958                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 959                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 960                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 961                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 962                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 963                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 964                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 965                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 966                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 967                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 968                 case 0x192: map_key_clear(KEY_CALC);            break;
 969                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 970                 case 0x194: map_key_clear(KEY_FILE);            break;
 971                 case 0x196: map_key_clear(KEY_WWW);             break;
 972                 case 0x199: map_key_clear(KEY_CHAT);            break;
 973                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 974                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 975                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 976                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 977                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 978                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 979                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 980                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 981                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 982                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 983                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 984                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 985                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 986                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 987                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 988                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 989                 case 0x1bd: map_key_clear(KEY_INFO);            break;
 990                 case 0x201: map_key_clear(KEY_NEW);             break;
 991                 case 0x202: map_key_clear(KEY_OPEN);            break;
 992                 case 0x203: map_key_clear(KEY_CLOSE);           break;
 993                 case 0x204: map_key_clear(KEY_EXIT);            break;
 994                 case 0x207: map_key_clear(KEY_SAVE);            break;
 995                 case 0x208: map_key_clear(KEY_PRINT);           break;
 996                 case 0x209: map_key_clear(KEY_PROPS);           break;
 997                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 998                 case 0x21b: map_key_clear(KEY_COPY);            break;
 999                 case 0x21c: map_key_clear(KEY_CUT);             break;
1000                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1001                 case 0x21f: map_key_clear(KEY_FIND);            break;
1002                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1003                 case 0x222: map_key_clear(KEY_GOTO);            break;
1004                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1005                 case 0x224: map_key_clear(KEY_BACK);            break;
1006                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1007                 case 0x226: map_key_clear(KEY_STOP);            break;
1008                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1009                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1010                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1011                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1012                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1013                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1014                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1015                 case 0x238: map_rel(REL_HWHEEL);                break;
1016                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1017                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1018                 case 0x269: map_key_clear(KEY_INSERT);          break;
1019                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1020                 case 0x279: map_key_clear(KEY_REDO);            break;
1021
1022                 case 0x289: map_key_clear(KEY_REPLY);           break;
1023                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1024                 case 0x28c: map_key_clear(KEY_SEND);            break;
1025
1026                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1027                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1028                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1029                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1030                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1031                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1032
1033                 default: map_key_clear(KEY_UNKNOWN);
1034                 }
1035                 break;
1036
1037         case HID_UP_GENDEVCTRLS:
1038                 switch (usage->hid) {
1039                 case HID_DC_BATTERYSTRENGTH:
1040                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1041                         usage->type = EV_PWR;
1042                         goto ignore;
1043                 }
1044                 goto unknown;
1045
1046         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1047                 set_bit(EV_REP, input->evbit);
1048                 switch (usage->hid & HID_USAGE) {
1049                 case 0x021: map_key_clear(KEY_PRINT);           break;
1050                 case 0x070: map_key_clear(KEY_HP);              break;
1051                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1052                 case 0x072: map_key_clear(KEY_SOUND);           break;
1053                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1054                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1055                 case 0x081: map_key_clear(KEY_CHAT);            break;
1056                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1057                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1058                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1059                 case 0x085: map_key_clear(KEY_SPORT);           break;
1060                 case 0x086: map_key_clear(KEY_SHOP);            break;
1061                 default:    goto ignore;
1062                 }
1063                 break;
1064
1065         case HID_UP_HPVENDOR2:
1066                 set_bit(EV_REP, input->evbit);
1067                 switch (usage->hid & HID_USAGE) {
1068                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1069                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1070                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1071                 default:    goto ignore;
1072                 }
1073                 break;
1074
1075         case HID_UP_MSVENDOR:
1076                 goto ignore;
1077
1078         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1079                 set_bit(EV_REP, input->evbit);
1080                 goto ignore;
1081
1082         case HID_UP_LOGIVENDOR:
1083                 /* intentional fallback */
1084         case HID_UP_LOGIVENDOR2:
1085                 /* intentional fallback */
1086         case HID_UP_LOGIVENDOR3:
1087                 goto ignore;
1088
1089         case HID_UP_PID:
1090                 switch (usage->hid & HID_USAGE) {
1091                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1092                 default: goto ignore;
1093                 }
1094                 break;
1095
1096         default:
1097         unknown:
1098                 if (field->report_size == 1) {
1099                         if (field->report->type == HID_OUTPUT_REPORT) {
1100                                 map_led(LED_MISC);
1101                                 break;
1102                         }
1103                         map_key(BTN_MISC);
1104                         break;
1105                 }
1106                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1107                         map_rel(REL_MISC);
1108                         break;
1109                 }
1110                 map_abs(ABS_MISC);
1111                 break;
1112         }
1113
1114 mapped:
1115         if (device->driver->input_mapped && device->driver->input_mapped(device,
1116                                 hidinput, field, usage, &bit, &max) < 0)
1117                 goto ignore;
1118
1119         set_bit(usage->type, input->evbit);
1120
1121         /*
1122          * This part is *really* controversial:
1123          * - HID aims at being generic so we should do our best to export
1124          *   all incoming events
1125          * - HID describes what events are, so there is no reason for ABS_X
1126          *   to be mapped to ABS_Y
1127          * - HID is using *_MISC+N as a default value, but nothing prevents
1128          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1129          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1130          *   processing)
1131          *
1132          * If devices still want to use this (at their own risk), they will
1133          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1134          * the default should be a reliable mapping.
1135          */
1136         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1137                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1138                         usage->code = find_next_zero_bit(bit,
1139                                                          max + 1,
1140                                                          usage->code);
1141                 } else {
1142                         device->status |= HID_STAT_DUP_DETECTED;
1143                         goto ignore;
1144                 }
1145         }
1146
1147         if (usage->code > max)
1148                 goto ignore;
1149
1150         if (usage->type == EV_ABS) {
1151
1152                 int a = field->logical_minimum;
1153                 int b = field->logical_maximum;
1154
1155                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1156                         a = field->logical_minimum = 0;
1157                         b = field->logical_maximum = 255;
1158                 }
1159
1160                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1161                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1162                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1163
1164                 input_abs_set_res(input, usage->code,
1165                                   hidinput_calc_abs_res(field, usage->code));
1166
1167                 /* use a larger default input buffer for MT devices */
1168                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1169                         input_set_events_per_packet(input, 60);
1170         }
1171
1172         if (usage->type == EV_ABS &&
1173             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1174                 int i;
1175                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1176                         input_set_abs_params(input, i, -1, 1, 0, 0);
1177                         set_bit(i, input->absbit);
1178                 }
1179                 if (usage->hat_dir && !field->dpad)
1180                         field->dpad = usage->code;
1181         }
1182
1183         /* for those devices which produce Consumer volume usage as relative,
1184          * we emulate pressing volumeup/volumedown appropriate number of times
1185          * in hidinput_hid_event()
1186          */
1187         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1188                         (usage->code == ABS_VOLUME)) {
1189                 set_bit(KEY_VOLUMEUP, input->keybit);
1190                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1191         }
1192
1193         if (usage->type == EV_KEY) {
1194                 set_bit(EV_MSC, input->evbit);
1195                 set_bit(MSC_SCAN, input->mscbit);
1196         }
1197
1198 ignore:
1199         return;
1200
1201 }
1202
1203 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1204 {
1205         struct input_dev *input;
1206         unsigned *quirks = &hid->quirks;
1207
1208         if (!usage->type)
1209                 return;
1210
1211         if (usage->type == EV_PWR) {
1212                 hidinput_update_battery(hid, value);
1213                 return;
1214         }
1215
1216         if (!field->hidinput)
1217                 return;
1218
1219         input = field->hidinput->input;
1220
1221         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1222                 int hat_dir = usage->hat_dir;
1223                 if (!hat_dir)
1224                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1225                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1226                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1227                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1228                 return;
1229         }
1230
1231         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1232                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1233                 return;
1234         }
1235
1236         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1237                 if (value) {
1238                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1239                         return;
1240                 }
1241                 input_event(input, usage->type, usage->code, 0);
1242                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1243                 return;
1244         }
1245
1246         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1247                 int a = field->logical_minimum;
1248                 int b = field->logical_maximum;
1249                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1250         }
1251
1252         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1253                 dbg_hid("Maximum Effects - %d\n",value);
1254                 return;
1255         }
1256
1257         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1258                 dbg_hid("PID Pool Report\n");
1259                 return;
1260         }
1261
1262         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1263                 return;
1264
1265         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1266                         (usage->code == ABS_VOLUME)) {
1267                 int count = abs(value);
1268                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1269                 int i;
1270
1271                 for (i = 0; i < count; i++) {
1272                         input_event(input, EV_KEY, direction, 1);
1273                         input_sync(input);
1274                         input_event(input, EV_KEY, direction, 0);
1275                         input_sync(input);
1276                 }
1277                 return;
1278         }
1279
1280         /*
1281          * Ignore out-of-range values as per HID specification,
1282          * section 5.10 and 6.2.25, when NULL state bit is present.
1283          * When it's not, clamp the value to match Microsoft's input
1284          * driver as mentioned in "Required HID usages for digitizers":
1285          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1286          *
1287          * The logical_minimum < logical_maximum check is done so that we
1288          * don't unintentionally discard values sent by devices which
1289          * don't specify logical min and max.
1290          */
1291         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1292             (field->logical_minimum < field->logical_maximum)) {
1293                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1294                     (value < field->logical_minimum ||
1295                      value > field->logical_maximum)) {
1296                         dbg_hid("Ignoring out-of-range value %x\n", value);
1297                         return;
1298                 }
1299                 value = clamp(value,
1300                               field->logical_minimum,
1301                               field->logical_maximum);
1302         }
1303
1304         /*
1305          * Ignore reports for absolute data if the data didn't change. This is
1306          * not only an optimization but also fixes 'dead' key reports. Some
1307          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1308          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1309          * can only have one of them physically available. The 'dead' keys
1310          * report constant 0. As all map to the same keycode, they'd confuse
1311          * the input layer. If we filter the 'dead' keys on the HID level, we
1312          * skip the keycode translation and only forward real events.
1313          */
1314         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1315                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1316                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1317             usage->usage_index < field->maxusage &&
1318             value == field->value[usage->usage_index])
1319                 return;
1320
1321         /* report the usage code as scancode if the key status has changed */
1322         if (usage->type == EV_KEY &&
1323             (!test_bit(usage->code, input->key)) == value)
1324                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1325
1326         input_event(input, usage->type, usage->code, value);
1327
1328         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1329             usage->type == EV_KEY && value) {
1330                 input_sync(input);
1331                 input_event(input, usage->type, usage->code, 0);
1332         }
1333 }
1334
1335 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1336 {
1337         struct hid_input *hidinput;
1338
1339         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1340                 return;
1341
1342         list_for_each_entry(hidinput, &hid->inputs, list)
1343                 input_sync(hidinput->input);
1344 }
1345 EXPORT_SYMBOL_GPL(hidinput_report_event);
1346
1347 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1348 {
1349         struct hid_report *report;
1350         int i, j;
1351
1352         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1353                 for (i = 0; i < report->maxfield; i++) {
1354                         *field = report->field[i];
1355                         for (j = 0; j < (*field)->maxusage; j++)
1356                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1357                                         return j;
1358                 }
1359         }
1360         return -1;
1361 }
1362 EXPORT_SYMBOL_GPL(hidinput_find_field);
1363
1364 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1365 {
1366         struct hid_report *report;
1367         struct hid_field *field;
1368         int i, j;
1369
1370         list_for_each_entry(report,
1371                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1372                             list) {
1373                 for (i = 0; i < report->maxfield; i++) {
1374                         field = report->field[i];
1375                         for (j = 0; j < field->maxusage; j++)
1376                                 if (field->usage[j].type == EV_LED)
1377                                         return field;
1378                 }
1379         }
1380         return NULL;
1381 }
1382 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1383
1384 unsigned int hidinput_count_leds(struct hid_device *hid)
1385 {
1386         struct hid_report *report;
1387         struct hid_field *field;
1388         int i, j;
1389         unsigned int count = 0;
1390
1391         list_for_each_entry(report,
1392                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1393                             list) {
1394                 for (i = 0; i < report->maxfield; i++) {
1395                         field = report->field[i];
1396                         for (j = 0; j < field->maxusage; j++)
1397                                 if (field->usage[j].type == EV_LED &&
1398                                     field->value[j])
1399                                         count += 1;
1400                 }
1401         }
1402         return count;
1403 }
1404 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1405
1406 static void hidinput_led_worker(struct work_struct *work)
1407 {
1408         struct hid_device *hid = container_of(work, struct hid_device,
1409                                               led_work);
1410         struct hid_field *field;
1411         struct hid_report *report;
1412         int ret;
1413         u32 len;
1414         __u8 *buf;
1415
1416         field = hidinput_get_led_field(hid);
1417         if (!field)
1418                 return;
1419
1420         /*
1421          * field->report is accessed unlocked regarding HID core. So there might
1422          * be another incoming SET-LED request from user-space, which changes
1423          * the LED state while we assemble our outgoing buffer. However, this
1424          * doesn't matter as hid_output_report() correctly converts it into a
1425          * boolean value no matter what information is currently set on the LED
1426          * field (even garbage). So the remote device will always get a valid
1427          * request.
1428          * And in case we send a wrong value, a next led worker is spawned
1429          * for every SET-LED request so the following worker will send the
1430          * correct value, guaranteed!
1431          */
1432
1433         report = field->report;
1434
1435         /* use custom SET_REPORT request if possible (asynchronous) */
1436         if (hid->ll_driver->request)
1437                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1438
1439         /* fall back to generic raw-output-report */
1440         len = hid_report_len(report);
1441         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1442         if (!buf)
1443                 return;
1444
1445         hid_output_report(report, buf);
1446         /* synchronous output report */
1447         ret = hid_hw_output_report(hid, buf, len);
1448         if (ret == -ENOSYS)
1449                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1450                                 HID_REQ_SET_REPORT);
1451         kfree(buf);
1452 }
1453
1454 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1455                                 unsigned int code, int value)
1456 {
1457         struct hid_device *hid = input_get_drvdata(dev);
1458         struct hid_field *field;
1459         int offset;
1460
1461         if (type == EV_FF)
1462                 return input_ff_event(dev, type, code, value);
1463
1464         if (type != EV_LED)
1465                 return -1;
1466
1467         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1468                 hid_warn(dev, "event field not found\n");
1469                 return -1;
1470         }
1471
1472         hid_set_field(field, offset, value);
1473
1474         schedule_work(&hid->led_work);
1475         return 0;
1476 }
1477
1478 static int hidinput_open(struct input_dev *dev)
1479 {
1480         struct hid_device *hid = input_get_drvdata(dev);
1481
1482         return hid_hw_open(hid);
1483 }
1484
1485 static void hidinput_close(struct input_dev *dev)
1486 {
1487         struct hid_device *hid = input_get_drvdata(dev);
1488
1489         hid_hw_close(hid);
1490 }
1491
1492 static void report_features(struct hid_device *hid)
1493 {
1494         struct hid_driver *drv = hid->driver;
1495         struct hid_report_enum *rep_enum;
1496         struct hid_report *rep;
1497         struct hid_usage *usage;
1498         int i, j;
1499
1500         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1501         list_for_each_entry(rep, &rep_enum->report_list, list)
1502                 for (i = 0; i < rep->maxfield; i++) {
1503                         /* Ignore if report count is out of bounds. */
1504                         if (rep->field[i]->report_count < 1)
1505                                 continue;
1506
1507                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1508                                 usage = &rep->field[i]->usage[j];
1509
1510                                 /* Verify if Battery Strength feature is available */
1511                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1512                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1513                                                                rep->field[i]);
1514
1515                                 if (drv->feature_mapping)
1516                                         drv->feature_mapping(hid, rep->field[i], usage);
1517                         }
1518                 }
1519 }
1520
1521 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1522                                            unsigned int application)
1523 {
1524         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1525         struct input_dev *input_dev = input_allocate_device();
1526         const char *suffix = NULL;
1527         size_t suffix_len, name_len;
1528
1529         if (!hidinput || !input_dev)
1530                 goto fail;
1531
1532         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1533             hid->maxapplication > 1) {
1534                 switch (application) {
1535                 case HID_GD_KEYBOARD:
1536                         suffix = "Keyboard";
1537                         break;
1538                 case HID_GD_KEYPAD:
1539                         suffix = "Keypad";
1540                         break;
1541                 case HID_GD_MOUSE:
1542                         suffix = "Mouse";
1543                         break;
1544                 case HID_DG_STYLUS:
1545                         suffix = "Pen";
1546                         break;
1547                 case HID_DG_TOUCHSCREEN:
1548                         suffix = "Touchscreen";
1549                         break;
1550                 case HID_DG_TOUCHPAD:
1551                         suffix = "Touchpad";
1552                         break;
1553                 case HID_GD_SYSTEM_CONTROL:
1554                         suffix = "System Control";
1555                         break;
1556                 case HID_CP_CONSUMER_CONTROL:
1557                         suffix = "Consumer Control";
1558                         break;
1559                 case HID_GD_WIRELESS_RADIO_CTLS:
1560                         suffix = "Wireless Radio Control";
1561                         break;
1562                 case HID_GD_SYSTEM_MULTIAXIS:
1563                         suffix = "System Multi Axis";
1564                         break;
1565                 default:
1566                         break;
1567                 }
1568         }
1569
1570         if (suffix) {
1571                 name_len = strlen(hid->name);
1572                 suffix_len = strlen(suffix);
1573                 if ((name_len < suffix_len) ||
1574                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1575                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1576                                                    hid->name, suffix);
1577                         if (!hidinput->name)
1578                                 goto fail;
1579                 }
1580         }
1581
1582         input_set_drvdata(input_dev, hid);
1583         input_dev->event = hidinput_input_event;
1584         input_dev->open = hidinput_open;
1585         input_dev->close = hidinput_close;
1586         input_dev->setkeycode = hidinput_setkeycode;
1587         input_dev->getkeycode = hidinput_getkeycode;
1588
1589         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1590         input_dev->phys = hid->phys;
1591         input_dev->uniq = hid->uniq;
1592         input_dev->id.bustype = hid->bus;
1593         input_dev->id.vendor  = hid->vendor;
1594         input_dev->id.product = hid->product;
1595         input_dev->id.version = hid->version;
1596         input_dev->dev.parent = &hid->dev;
1597
1598         hidinput->input = input_dev;
1599         hidinput->application = application;
1600         list_add_tail(&hidinput->list, &hid->inputs);
1601
1602         INIT_LIST_HEAD(&hidinput->reports);
1603
1604         return hidinput;
1605
1606 fail:
1607         kfree(hidinput);
1608         input_free_device(input_dev);
1609         hid_err(hid, "Out of memory during hid input probe\n");
1610         return NULL;
1611 }
1612
1613 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1614 {
1615         int i;
1616         unsigned long r = 0;
1617
1618         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1619                 r |= hidinput->input->evbit[i];
1620
1621         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1622                 r |= hidinput->input->keybit[i];
1623
1624         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1625                 r |= hidinput->input->relbit[i];
1626
1627         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1628                 r |= hidinput->input->absbit[i];
1629
1630         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1631                 r |= hidinput->input->mscbit[i];
1632
1633         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1634                 r |= hidinput->input->ledbit[i];
1635
1636         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1637                 r |= hidinput->input->sndbit[i];
1638
1639         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1640                 r |= hidinput->input->ffbit[i];
1641
1642         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1643                 r |= hidinput->input->swbit[i];
1644
1645         return !!r;
1646 }
1647
1648 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1649                 struct hid_input *hidinput)
1650 {
1651         struct hid_report *report;
1652         int i, k;
1653
1654         list_del(&hidinput->list);
1655         input_free_device(hidinput->input);
1656         kfree(hidinput->name);
1657
1658         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1659                 if (k == HID_OUTPUT_REPORT &&
1660                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1661                         continue;
1662
1663                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1664                                     list) {
1665
1666                         for (i = 0; i < report->maxfield; i++)
1667                                 if (report->field[i]->hidinput == hidinput)
1668                                         report->field[i]->hidinput = NULL;
1669                 }
1670         }
1671
1672         kfree(hidinput);
1673 }
1674
1675 static struct hid_input *hidinput_match(struct hid_report *report)
1676 {
1677         struct hid_device *hid = report->device;
1678         struct hid_input *hidinput;
1679
1680         list_for_each_entry(hidinput, &hid->inputs, list) {
1681                 if (hidinput->report &&
1682                     hidinput->report->id == report->id)
1683                         return hidinput;
1684         }
1685
1686         return NULL;
1687 }
1688
1689 static struct hid_input *hidinput_match_application(struct hid_report *report)
1690 {
1691         struct hid_device *hid = report->device;
1692         struct hid_input *hidinput;
1693
1694         list_for_each_entry(hidinput, &hid->inputs, list) {
1695                 if (hidinput->application == report->application)
1696                         return hidinput;
1697         }
1698
1699         return NULL;
1700 }
1701
1702 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1703                                              struct hid_report *report)
1704 {
1705         int i, j;
1706
1707         for (i = 0; i < report->maxfield; i++)
1708                 for (j = 0; j < report->field[i]->maxusage; j++)
1709                         hidinput_configure_usage(hidinput, report->field[i],
1710                                                  report->field[i]->usage + j);
1711 }
1712
1713 /*
1714  * Register the input device; print a message.
1715  * Configure the input layer interface
1716  * Read all reports and initialize the absolute field values.
1717  */
1718
1719 int hidinput_connect(struct hid_device *hid, unsigned int force)
1720 {
1721         struct hid_driver *drv = hid->driver;
1722         struct hid_report *report;
1723         struct hid_input *next, *hidinput = NULL;
1724         unsigned int application;
1725         int i, k;
1726
1727         INIT_LIST_HEAD(&hid->inputs);
1728         INIT_WORK(&hid->led_work, hidinput_led_worker);
1729
1730         hid->status &= ~HID_STAT_DUP_DETECTED;
1731
1732         if (!force) {
1733                 for (i = 0; i < hid->maxcollection; i++) {
1734                         struct hid_collection *col = &hid->collection[i];
1735                         if (col->type == HID_COLLECTION_APPLICATION ||
1736                                         col->type == HID_COLLECTION_PHYSICAL)
1737                                 if (IS_INPUT_APPLICATION(col->usage))
1738                                         break;
1739                 }
1740
1741                 if (i == hid->maxcollection)
1742                         return -1;
1743         }
1744
1745         report_features(hid);
1746
1747         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1748                 if (k == HID_OUTPUT_REPORT &&
1749                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1750                         continue;
1751
1752                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1753
1754                         if (!report->maxfield)
1755                                 continue;
1756
1757                         application = report->application;
1758
1759                         /*
1760                          * Find the previous hidinput report attached
1761                          * to this report id.
1762                          */
1763                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1764                                 hidinput = hidinput_match(report);
1765                         else if (hid->maxapplication > 1 &&
1766                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1767                                 hidinput = hidinput_match_application(report);
1768
1769                         if (!hidinput) {
1770                                 hidinput = hidinput_allocate(hid, application);
1771                                 if (!hidinput)
1772                                         goto out_unwind;
1773                         }
1774
1775                         hidinput_configure_usages(hidinput, report);
1776
1777                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1778                                 hidinput->report = report;
1779
1780                         list_add_tail(&report->hidinput_list,
1781                                       &hidinput->reports);
1782                 }
1783         }
1784
1785         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1786                 if (drv->input_configured &&
1787                     drv->input_configured(hid, hidinput))
1788                         goto out_unwind;
1789
1790                 if (!hidinput_has_been_populated(hidinput)) {
1791                         /* no need to register an input device not populated */
1792                         hidinput_cleanup_hidinput(hid, hidinput);
1793                         continue;
1794                 }
1795
1796                 if (input_register_device(hidinput->input))
1797                         goto out_unwind;
1798                 hidinput->registered = true;
1799         }
1800
1801         if (list_empty(&hid->inputs)) {
1802                 hid_err(hid, "No inputs registered, leaving\n");
1803                 goto out_unwind;
1804         }
1805
1806         if (hid->status & HID_STAT_DUP_DETECTED)
1807                 hid_dbg(hid,
1808                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1809
1810         return 0;
1811
1812 out_unwind:
1813         /* unwind the ones we already registered */
1814         hidinput_disconnect(hid);
1815
1816         return -1;
1817 }
1818 EXPORT_SYMBOL_GPL(hidinput_connect);
1819
1820 void hidinput_disconnect(struct hid_device *hid)
1821 {
1822         struct hid_input *hidinput, *next;
1823
1824         hidinput_cleanup_battery(hid);
1825
1826         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1827                 list_del(&hidinput->list);
1828                 if (hidinput->registered)
1829                         input_unregister_device(hidinput->input);
1830                 else
1831                         input_free_device(hidinput->input);
1832                 kfree(hidinput->name);
1833                 kfree(hidinput);
1834         }
1835
1836         /* led_work is spawned by input_dev callbacks, but doesn't access the
1837          * parent input_dev at all. Once all input devices are removed, we
1838          * know that led_work will never get restarted, so we can cancel it
1839          * synchronously and are safe. */
1840         cancel_work_sync(&hid->led_work);
1841 }
1842 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1843