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_TILT_X:
 257         case ABS_TILT_Y:
 258                 if (field->unit == 0x14) {              /* If degrees */
 259                         /* Convert to radians */
 260                         prev = logical_extents;
 261                         logical_extents *= 573;
 262                         if (logical_extents < prev)
 263                                 return 0;
 264                         unit_exponent += 1;
 265                 } else if (field->unit != 0x12) {       /* If not radians */
 266                         return 0;
 267                 }
 268                 break;
 269
 270         default:
 271                 return 0;
 272         }
 273
 274         /* Apply negative unit exponent */
 275         for (; unit_exponent < 0; unit_exponent++) {
 276                 prev = logical_extents;
 277                 logical_extents *= 10;
 278                 if (logical_extents < prev)
 279                         return 0;
 280         }
 281         /* Apply positive unit exponent */
 282         for (; unit_exponent > 0; unit_exponent--) {
 283                 prev = physical_extents;
 284                 physical_extents *= 10;
 285                 if (physical_extents < prev)
 286                         return 0;
 287         }
 288
 289         /* Calculate resolution */
 290         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 291 }
 292 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 293
 294 #ifdef CONFIG_HID_BATTERY_STRENGTH
 295 static enum power_supply_property hidinput_battery_props[] = {
 296         POWER_SUPPLY_PROP_PRESENT,
 297         POWER_SUPPLY_PROP_ONLINE,
 298         POWER_SUPPLY_PROP_CAPACITY,
 299         POWER_SUPPLY_PROP_MODEL_NAME,
 300         POWER_SUPPLY_PROP_STATUS,
 301         POWER_SUPPLY_PROP_SCOPE,
 302 };
 303
 304 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 305 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 306 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 307
 308 static const struct hid_device_id hid_battery_quirks[] = {
 309         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 310                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 311           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 312         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 313                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 314           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 315         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 316                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 317           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 318         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 319                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 320           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 321         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 322                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 323           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 324         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 325                 USB_DEVICE_ID_ELECOM_BM084),
 326           HID_BATTERY_QUIRK_IGNORE },
 327         {}
 328 };
 329
 330 static unsigned find_battery_quirk(struct hid_device *hdev)
 331 {
 332         unsigned quirks = 0;
 333         const struct hid_device_id *match;
 334
 335         match = hid_match_id(hdev, hid_battery_quirks);
 336         if (match != NULL)
 337                 quirks = match->driver_data;
 338
 339         return quirks;
 340 }
 341
 342 static int hidinput_get_battery_property(struct power_supply *psy,
 343                                          enum power_supply_property prop,
 344                                          union power_supply_propval *val)
 345 {
 346         struct hid_device *dev = power_supply_get_drvdata(psy);
 347         int ret = 0;
 348         __u8 *buf;
 349
 350         switch (prop) {
 351         case POWER_SUPPLY_PROP_PRESENT:
 352         case POWER_SUPPLY_PROP_ONLINE:
 353                 val->intval = 1;
 354                 break;
 355
 356         case POWER_SUPPLY_PROP_CAPACITY:
 357
 358                 buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
 359                 if (!buf) {
 360                         ret = -ENOMEM;
 361                         break;
 362                 }
 363                 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 364                                          dev->battery_report_type,
 365                                          HID_REQ_GET_REPORT);
 366
 367                 if (ret != 2) {
 368                         ret = -ENODATA;
 369                         kfree(buf);
 370                         break;
 371                 }
 372                 ret = 0;
 373
 374                 if (dev->battery_min < dev->battery_max &&
 375                     buf[1] >= dev->battery_min &&
 376                     buf[1] <= dev->battery_max)
 377                         val->intval = (100 * (buf[1] - dev->battery_min)) /
 378                                 (dev->battery_max - dev->battery_min);
 379                 kfree(buf);
 380                 break;
 381
 382         case POWER_SUPPLY_PROP_MODEL_NAME:
 383                 val->strval = dev->name;
 384                 break;
 385
 386         case POWER_SUPPLY_PROP_STATUS:
 387                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 388                 break;
 389
 390         case POWER_SUPPLY_PROP_SCOPE:
 391                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 392                 break;
 393
 394         default:
 395                 ret = -EINVAL;
 396                 break;
 397         }
 398
 399         return ret;
 400 }
 401
 402 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 403 {
 404         struct power_supply_desc *psy_desc = NULL;
 405         struct power_supply_config psy_cfg = { .drv_data = dev, };
 406         unsigned quirks;
 407         s32 min, max;
 408
 409         if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
 410                 return false;   /* no match */
 411
 412         if (dev->battery != NULL)
 413                 goto out;       /* already initialized? */
 414
 415         quirks = find_battery_quirk(dev);
 416
 417         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 418                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 419
 420         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 421                 goto out;
 422
 423         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 424         if (psy_desc == NULL)
 425                 goto out;
 426
 427         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
 428         if (psy_desc->name == NULL) {
 429                 kfree(psy_desc);
 430                 goto out;
 431         }
 432
 433         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 434         psy_desc->properties = hidinput_battery_props;
 435         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 436         psy_desc->use_for_apm = 0;
 437         psy_desc->get_property = hidinput_get_battery_property;
 438
 439         min = field->logical_minimum;
 440         max = field->logical_maximum;
 441
 442         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 443                 min = 0;
 444                 max = 100;
 445         }
 446
 447         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 448                 report_type = HID_FEATURE_REPORT;
 449
 450         dev->battery_min = min;
 451         dev->battery_max = max;
 452         dev->battery_report_type = report_type;
 453         dev->battery_report_id = field->report->id;
 454
 455         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 456         if (IS_ERR(dev->battery)) {
 457                 hid_warn(dev, "can't register power supply: %ld\n",
 458                                 PTR_ERR(dev->battery));
 459                 kfree(psy_desc->name);
 460                 kfree(psy_desc);
 461                 dev->battery = NULL;
 462         } else {
 463                 power_supply_powers(dev->battery, &dev->dev);
 464         }
 465
 466 out:
 467         return true;
 468 }
 469
 470 static void hidinput_cleanup_battery(struct hid_device *dev)
 471 {
 472         const struct power_supply_desc *psy_desc;
 473
 474         if (!dev->battery)
 475                 return;
 476
 477         psy_desc = dev->battery->desc;
 478         power_supply_unregister(dev->battery);
 479         kfree(psy_desc->name);
 480         kfree(psy_desc);
 481         dev->battery = NULL;
 482 }
 483 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 484 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 485                                    struct hid_field *field)
 486 {
 487         return false;
 488 }
 489
 490 static void hidinput_cleanup_battery(struct hid_device *dev)
 491 {
 492 }
 493 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 494
 495 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 496                                      struct hid_usage *usage)
 497 {
 498         struct input_dev *input = hidinput->input;
 499         struct hid_device *device = input_get_drvdata(input);
 500         int max = 0, code;
 501         unsigned long *bit = NULL;
 502
 503         field->hidinput = hidinput;
 504
 505         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 506                 goto ignore;
 507
 508         /* Ignore if report count is out of bounds. */
 509         if (field->report_count < 1)
 510                 goto ignore;
 511
 512         /* only LED usages are supported in output fields */
 513         if (field->report_type == HID_OUTPUT_REPORT &&
 514                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 515                 goto ignore;
 516         }
 517
 518         if (device->driver->input_mapping) {
 519                 int ret = device->driver->input_mapping(device, hidinput, field,
 520                                 usage, &bit, &max);
 521                 if (ret > 0)
 522                         goto mapped;
 523                 if (ret < 0)
 524                         goto ignore;
 525         }
 526
 527         switch (usage->hid & HID_USAGE_PAGE) {
 528         case HID_UP_UNDEFINED:
 529                 goto ignore;
 530
 531         case HID_UP_KEYBOARD:
 532                 set_bit(EV_REP, input->evbit);
 533
 534                 if ((usage->hid & HID_USAGE) < 256) {
 535                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 536                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 537                 } else
 538                         map_key(KEY_UNKNOWN);
 539
 540                 break;
 541
 542         case HID_UP_BUTTON:
 543                 code = ((usage->hid - 1) & HID_USAGE);
 544
 545                 switch (field->application) {
 546                 case HID_GD_MOUSE:
 547                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 548                 case HID_GD_JOYSTICK:
 549                                 if (code <= 0xf)
 550                                         code += BTN_JOYSTICK;
 551                                 else
 552                                         code += BTN_TRIGGER_HAPPY - 0x10;
 553                                 break;
 554                 case HID_GD_GAMEPAD:
 555                                 if (code <= 0xf)
 556                                         code += BTN_GAMEPAD;
 557                                 else
 558                                         code += BTN_TRIGGER_HAPPY - 0x10;
 559                                 break;
 560                 default:
 561                         switch (field->physical) {
 562                         case HID_GD_MOUSE:
 563                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 564                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 565                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 566                         default:              code += BTN_MISC;
 567                         }
 568                 }
 569
 570                 map_key(code);
 571                 break;
 572
 573         case HID_UP_SIMULATION:
 574                 switch (usage->hid & 0xffff) {
 575                 case 0xba: map_abs(ABS_RUDDER);   break;
 576                 case 0xbb: map_abs(ABS_THROTTLE); break;
 577                 case 0xc4: map_abs(ABS_GAS);      break;
 578                 case 0xc5: map_abs(ABS_BRAKE);    break;
 579                 case 0xc8: map_abs(ABS_WHEEL);    break;
 580                 default:   goto ignore;
 581                 }
 582                 break;
 583
 584         case HID_UP_GENDESK:
 585                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 586                         switch (usage->hid & 0xf) {
 587                         case 0x1: map_key_clear(KEY_POWER);  break;
 588                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 589                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 590                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 591                         case 0x5: map_key_clear(KEY_MENU); break;
 592                         case 0x6: map_key_clear(KEY_PROG1); break;
 593                         case 0x7: map_key_clear(KEY_HELP); break;
 594                         case 0x8: map_key_clear(KEY_EXIT); break;
 595                         case 0x9: map_key_clear(KEY_SELECT); break;
 596                         case 0xa: map_key_clear(KEY_RIGHT); break;
 597                         case 0xb: map_key_clear(KEY_LEFT); break;
 598                         case 0xc: map_key_clear(KEY_UP); break;
 599                         case 0xd: map_key_clear(KEY_DOWN); break;
 600                         case 0xe: map_key_clear(KEY_POWER2); break;
 601                         case 0xf: map_key_clear(KEY_RESTART); break;
 602                         default: goto unknown;
 603                         }
 604                         break;
 605                 }
 606
 607                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 608                         switch (usage->hid) {
 609                         case HID_GD_UP:    usage->hat_dir = 1; break;
 610                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 611                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 612                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 613                         default: goto unknown;
 614                         }
 615                         if (field->dpad) {
 616                                 map_abs(field->dpad);
 617                                 goto ignore;
 618                         }
 619                         map_abs(ABS_HAT0X);
 620                         break;
 621                 }
 622
 623                 switch (usage->hid) {
 624                 /* These usage IDs map directly to the usage codes. */
 625                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 626                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 627                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 628                                 map_rel(usage->hid & 0xf);
 629                         else
 630                                 map_abs_clear(usage->hid & 0xf);
 631                         break;
 632
 633                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 634                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 635                                 map_rel(usage->hid & 0xf);
 636                         else
 637                                 map_abs(usage->hid & 0xf);
 638                         break;
 639
 640                 case HID_GD_HATSWITCH:
 641                         usage->hat_min = field->logical_minimum;
 642                         usage->hat_max = field->logical_maximum;
 643                         map_abs(ABS_HAT0X);
 644                         break;
 645
 646                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 647                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 648
 649                 default: goto unknown;
 650                 }
 651
 652                 break;
 653
 654         case HID_UP_LED:
 655                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 656                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 657                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 658                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 659                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 660                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 661                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 662                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 663                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 664                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 665                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 666                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 667
 668                 default: goto ignore;
 669                 }
 670                 break;
 671
 672         case HID_UP_DIGITIZER:
 673                 switch (usage->hid & 0xff) {
 674                 case 0x00: /* Undefined */
 675                         goto ignore;
 676
 677                 case 0x30: /* TipPressure */
 678                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 679                                 device->quirks |= HID_QUIRK_NOTOUCH;
 680                                 set_bit(EV_KEY, input->evbit);
 681                                 set_bit(BTN_TOUCH, input->keybit);
 682                         }
 683                         map_abs_clear(ABS_PRESSURE);
 684                         break;
 685
 686                 case 0x32: /* InRange */
 687                         switch (field->physical & 0xff) {
 688                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 689                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 690                         default: map_key(BTN_TOOL_PEN); break;
 691                         }
 692                         break;
 693
 694                 case 0x3c: /* Invert */
 695                         map_key_clear(BTN_TOOL_RUBBER);
 696                         break;
 697
 698                 case 0x3d: /* X Tilt */
 699                         map_abs_clear(ABS_TILT_X);
 700                         break;
 701
 702                 case 0x3e: /* Y Tilt */
 703                         map_abs_clear(ABS_TILT_Y);
 704                         break;
 705
 706                 case 0x33: /* Touch */
 707                 case 0x42: /* TipSwitch */
 708                 case 0x43: /* TipSwitch2 */
 709                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 710                         map_key_clear(BTN_TOUCH);
 711                         break;
 712
 713                 case 0x44: /* BarrelSwitch */
 714                         map_key_clear(BTN_STYLUS);
 715                         break;
 716
 717                 case 0x46: /* TabletPick */
 718                 case 0x5a: /* SecondaryBarrelSwitch */
 719                         map_key_clear(BTN_STYLUS2);
 720                         break;
 721
 722                 case 0x5b: /* TransducerSerialNumber */
 723                         usage->type = EV_MSC;
 724                         usage->code = MSC_SERIAL;
 725                         bit = input->mscbit;
 726                         max = MSC_MAX;
 727                         break;
 728
 729                 default:  goto unknown;
 730                 }
 731                 break;
 732
 733         case HID_UP_TELEPHONY:
 734                 switch (usage->hid & HID_USAGE) {
 735                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 736                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 737                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 738                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 739                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 740                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 741                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 742                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 743                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 744                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 745                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 746                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 747                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 748                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 749                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 750                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 751                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 752                 default: goto ignore;
 753                 }
 754                 break;
 755
 756         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 757                 switch (usage->hid & HID_USAGE) {
 758                 case 0x000: goto ignore;
 759                 case 0x030: map_key_clear(KEY_POWER);           break;
 760                 case 0x031: map_key_clear(KEY_RESTART);         break;
 761                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 762                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 763                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 764                 case 0x036: map_key_clear(BTN_MISC);            break;
 765
 766                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 767                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 768                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 769                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 770                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 771                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 772                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 773                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 774                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 775
 776                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 777                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 778                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 779                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 780                 case 0x069: map_key_clear(KEY_RED);             break;
 781                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 782                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 783                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 784                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
 785
 786                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 787                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 788                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 789                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 790                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 791                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 792
 793                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 794                 case 0x083: map_key_clear(KEY_LAST);            break;
 795                 case 0x084: map_key_clear(KEY_ENTER);           break;
 796                 case 0x088: map_key_clear(KEY_PC);              break;
 797                 case 0x089: map_key_clear(KEY_TV);              break;
 798                 case 0x08a: map_key_clear(KEY_WWW);             break;
 799                 case 0x08b: map_key_clear(KEY_DVD);             break;
 800                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 801                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 802                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 803                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 804                 case 0x090: map_key_clear(KEY_MEMO);            break;
 805                 case 0x091: map_key_clear(KEY_CD);              break;
 806                 case 0x092: map_key_clear(KEY_VCR);             break;
 807                 case 0x093: map_key_clear(KEY_TUNER);           break;
 808                 case 0x094: map_key_clear(KEY_EXIT);            break;
 809                 case 0x095: map_key_clear(KEY_HELP);            break;
 810                 case 0x096: map_key_clear(KEY_TAPE);            break;
 811                 case 0x097: map_key_clear(KEY_TV2);             break;
 812                 case 0x098: map_key_clear(KEY_SAT);             break;
 813                 case 0x09a: map_key_clear(KEY_PVR);             break;
 814
 815                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 816                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 817                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 818
 819                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 820                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 821                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 822                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 823                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 824                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 825                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 826                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 827                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 828                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 829                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 830                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 831
 832                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 833                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 834                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 835                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 836                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 837                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 838                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 839                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 840
 841                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 842                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 843                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 844                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 845                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 846                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 847                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 848                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 849                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 850                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 851                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 852                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 853                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 854                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 855                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 856                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 857                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 858                 case 0x192: map_key_clear(KEY_CALC);            break;
 859                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 860                 case 0x194: map_key_clear(KEY_FILE);            break;
 861                 case 0x196: map_key_clear(KEY_WWW);             break;
 862                 case 0x199: map_key_clear(KEY_CHAT);            break;
 863                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 864                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 865                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 866                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 867                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 868                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 869                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 870                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 871                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 872                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 873                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 874                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 875                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 876                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 877                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 878                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 879                 case 0x1bd: map_key_clear(KEY_INFO);            break;
 880                 case 0x201: map_key_clear(KEY_NEW);             break;
 881                 case 0x202: map_key_clear(KEY_OPEN);            break;
 882                 case 0x203: map_key_clear(KEY_CLOSE);           break;
 883                 case 0x204: map_key_clear(KEY_EXIT);            break;
 884                 case 0x207: map_key_clear(KEY_SAVE);            break;
 885                 case 0x208: map_key_clear(KEY_PRINT);           break;
 886                 case 0x209: map_key_clear(KEY_PROPS);           break;
 887                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 888                 case 0x21b: map_key_clear(KEY_COPY);            break;
 889                 case 0x21c: map_key_clear(KEY_CUT);             break;
 890                 case 0x21d: map_key_clear(KEY_PASTE);           break;
 891                 case 0x21f: map_key_clear(KEY_FIND);            break;
 892                 case 0x221: map_key_clear(KEY_SEARCH);          break;
 893                 case 0x222: map_key_clear(KEY_GOTO);            break;
 894                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 895                 case 0x224: map_key_clear(KEY_BACK);            break;
 896                 case 0x225: map_key_clear(KEY_FORWARD);         break;
 897                 case 0x226: map_key_clear(KEY_STOP);            break;
 898                 case 0x227: map_key_clear(KEY_REFRESH);         break;
 899                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 900                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
 901                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
 902                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
 903                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
 904                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
 905                 case 0x238: map_rel(REL_HWHEEL);                break;
 906                 case 0x23d: map_key_clear(KEY_EDIT);            break;
 907                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
 908                 case 0x269: map_key_clear(KEY_INSERT);          break;
 909                 case 0x26a: map_key_clear(KEY_DELETE);          break;
 910                 case 0x279: map_key_clear(KEY_REDO);            break;
 911
 912                 case 0x289: map_key_clear(KEY_REPLY);           break;
 913                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
 914                 case 0x28c: map_key_clear(KEY_SEND);            break;
 915
 916                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
 917                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
 918                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
 919                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
 920                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
 921                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
 922
 923                 default: map_key_clear(KEY_UNKNOWN);
 924                 }
 925                 break;
 926
 927         case HID_UP_GENDEVCTRLS:
 928                 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
 929                         goto ignore;
 930                 else
 931                         goto unknown;
 932                 break;
 933
 934         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 935                 set_bit(EV_REP, input->evbit);
 936                 switch (usage->hid & HID_USAGE) {
 937                 case 0x021: map_key_clear(KEY_PRINT);           break;
 938                 case 0x070: map_key_clear(KEY_HP);              break;
 939                 case 0x071: map_key_clear(KEY_CAMERA);          break;
 940                 case 0x072: map_key_clear(KEY_SOUND);           break;
 941                 case 0x073: map_key_clear(KEY_QUESTION);        break;
 942                 case 0x080: map_key_clear(KEY_EMAIL);           break;
 943                 case 0x081: map_key_clear(KEY_CHAT);            break;
 944                 case 0x082: map_key_clear(KEY_SEARCH);          break;
 945                 case 0x083: map_key_clear(KEY_CONNECT);         break;
 946                 case 0x084: map_key_clear(KEY_FINANCE);         break;
 947                 case 0x085: map_key_clear(KEY_SPORT);           break;
 948                 case 0x086: map_key_clear(KEY_SHOP);            break;
 949                 default:    goto ignore;
 950                 }
 951                 break;
 952
 953         case HID_UP_HPVENDOR2:
 954                 set_bit(EV_REP, input->evbit);
 955                 switch (usage->hid & HID_USAGE) {
 956                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
 957                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
 958                 default:    goto ignore;
 959                 }
 960                 break;
 961
 962         case HID_UP_MSVENDOR:
 963                 goto ignore;
 964
 965         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
 966                 set_bit(EV_REP, input->evbit);
 967                 goto ignore;
 968
 969         case HID_UP_LOGIVENDOR:
 970                 /* intentional fallback */
 971         case HID_UP_LOGIVENDOR2:
 972                 /* intentional fallback */
 973         case HID_UP_LOGIVENDOR3:
 974                 goto ignore;
 975
 976         case HID_UP_PID:
 977                 switch (usage->hid & HID_USAGE) {
 978                 case 0xa4: map_key_clear(BTN_DEAD);     break;
 979                 default: goto ignore;
 980                 }
 981                 break;
 982
 983         default:
 984         unknown:
 985                 if (field->report_size == 1) {
 986                         if (field->report->type == HID_OUTPUT_REPORT) {
 987                                 map_led(LED_MISC);
 988                                 break;
 989                         }
 990                         map_key(BTN_MISC);
 991                         break;
 992                 }
 993                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 994                         map_rel(REL_MISC);
 995                         break;
 996                 }
 997                 map_abs(ABS_MISC);
 998                 break;
 999         }
1000
1001 mapped:
1002         if (device->driver->input_mapped && device->driver->input_mapped(device,
1003                                 hidinput, field, usage, &bit, &max) < 0)
1004                 goto ignore;
1005
1006         set_bit(usage->type, input->evbit);
1007
1008         while (usage->code <= max && test_and_set_bit(usage->code, bit))
1009                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
1010
1011         if (usage->code > max)
1012                 goto ignore;
1013
1014
1015         if (usage->type == EV_ABS) {
1016
1017                 int a = field->logical_minimum;
1018                 int b = field->logical_maximum;
1019
1020                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1021                         a = field->logical_minimum = 0;
1022                         b = field->logical_maximum = 255;
1023                 }
1024
1025                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1026                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1027                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1028
1029                 input_abs_set_res(input, usage->code,
1030                                   hidinput_calc_abs_res(field, usage->code));
1031
1032                 /* use a larger default input buffer for MT devices */
1033                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1034                         input_set_events_per_packet(input, 60);
1035         }
1036
1037         if (usage->type == EV_ABS &&
1038             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1039                 int i;
1040                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1041                         input_set_abs_params(input, i, -1, 1, 0, 0);
1042                         set_bit(i, input->absbit);
1043                 }
1044                 if (usage->hat_dir && !field->dpad)
1045                         field->dpad = usage->code;
1046         }
1047
1048         /* for those devices which produce Consumer volume usage as relative,
1049          * we emulate pressing volumeup/volumedown appropriate number of times
1050          * in hidinput_hid_event()
1051          */
1052         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1053                         (usage->code == ABS_VOLUME)) {
1054                 set_bit(KEY_VOLUMEUP, input->keybit);
1055                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1056         }
1057
1058         if (usage->type == EV_KEY) {
1059                 set_bit(EV_MSC, input->evbit);
1060                 set_bit(MSC_SCAN, input->mscbit);
1061         }
1062
1063 ignore:
1064         return;
1065
1066 }
1067
1068 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1069 {
1070         struct input_dev *input;
1071         unsigned *quirks = &hid->quirks;
1072
1073         if (!field->hidinput)
1074                 return;
1075
1076         input = field->hidinput->input;
1077
1078         if (!usage->type)
1079                 return;
1080
1081         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1082                 int hat_dir = usage->hat_dir;
1083                 if (!hat_dir)
1084                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1085                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1086                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1087                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1088                 return;
1089         }
1090
1091         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1092                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1093                 return;
1094         }
1095
1096         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1097                 if (value) {
1098                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1099                         return;
1100                 }
1101                 input_event(input, usage->type, usage->code, 0);
1102                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1103                 return;
1104         }
1105
1106         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1107                 int a = field->logical_minimum;
1108                 int b = field->logical_maximum;
1109                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1110         }
1111
1112         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1113                 dbg_hid("Maximum Effects - %d\n",value);
1114                 return;
1115         }
1116
1117         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1118                 dbg_hid("PID Pool Report\n");
1119                 return;
1120         }
1121
1122         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1123                 return;
1124
1125         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1126                         (usage->code == ABS_VOLUME)) {
1127                 int count = abs(value);
1128                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1129                 int i;
1130
1131                 for (i = 0; i < count; i++) {
1132                         input_event(input, EV_KEY, direction, 1);
1133                         input_sync(input);
1134                         input_event(input, EV_KEY, direction, 0);
1135                         input_sync(input);
1136                 }
1137                 return;
1138         }
1139
1140         /*
1141          * Ignore out-of-range values as per HID specification,
1142          * section 5.10 and 6.2.25.
1143          *
1144          * The logical_minimum < logical_maximum check is done so that we
1145          * don't unintentionally discard values sent by devices which
1146          * don't specify logical min and max.
1147          */
1148         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1149             (field->logical_minimum < field->logical_maximum) &&
1150             (value < field->logical_minimum ||
1151              value > field->logical_maximum)) {
1152                 dbg_hid("Ignoring out-of-range value %x\n", value);
1153                 return;
1154         }
1155
1156         /*
1157          * Ignore reports for absolute data if the data didn't change. This is
1158          * not only an optimization but also fixes 'dead' key reports. Some
1159          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1160          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1161          * can only have one of them physically available. The 'dead' keys
1162          * report constant 0. As all map to the same keycode, they'd confuse
1163          * the input layer. If we filter the 'dead' keys on the HID level, we
1164          * skip the keycode translation and only forward real events.
1165          */
1166         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1167                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1168                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1169             usage->usage_index < field->maxusage &&
1170             value == field->value[usage->usage_index])
1171                 return;
1172
1173         /* report the usage code as scancode if the key status has changed */
1174         if (usage->type == EV_KEY &&
1175             (!test_bit(usage->code, input->key)) == value)
1176                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1177
1178         input_event(input, usage->type, usage->code, value);
1179
1180         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1181             usage->type == EV_KEY && value) {
1182                 input_sync(input);
1183                 input_event(input, usage->type, usage->code, 0);
1184         }
1185 }
1186
1187 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1188 {
1189         struct hid_input *hidinput;
1190
1191         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1192                 return;
1193
1194         list_for_each_entry(hidinput, &hid->inputs, list)
1195                 input_sync(hidinput->input);
1196 }
1197 EXPORT_SYMBOL_GPL(hidinput_report_event);
1198
1199 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1200 {
1201         struct hid_report *report;
1202         int i, j;
1203
1204         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1205                 for (i = 0; i < report->maxfield; i++) {
1206                         *field = report->field[i];
1207                         for (j = 0; j < (*field)->maxusage; j++)
1208                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1209                                         return j;
1210                 }
1211         }
1212         return -1;
1213 }
1214 EXPORT_SYMBOL_GPL(hidinput_find_field);
1215
1216 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1217 {
1218         struct hid_report *report;
1219         struct hid_field *field;
1220         int i, j;
1221
1222         list_for_each_entry(report,
1223                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1224                             list) {
1225                 for (i = 0; i < report->maxfield; i++) {
1226                         field = report->field[i];
1227                         for (j = 0; j < field->maxusage; j++)
1228                                 if (field->usage[j].type == EV_LED)
1229                                         return field;
1230                 }
1231         }
1232         return NULL;
1233 }
1234 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1235
1236 unsigned int hidinput_count_leds(struct hid_device *hid)
1237 {
1238         struct hid_report *report;
1239         struct hid_field *field;
1240         int i, j;
1241         unsigned int count = 0;
1242
1243         list_for_each_entry(report,
1244                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1245                             list) {
1246                 for (i = 0; i < report->maxfield; i++) {
1247                         field = report->field[i];
1248                         for (j = 0; j < field->maxusage; j++)
1249                                 if (field->usage[j].type == EV_LED &&
1250                                     field->value[j])
1251                                         count += 1;
1252                 }
1253         }
1254         return count;
1255 }
1256 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1257
1258 static void hidinput_led_worker(struct work_struct *work)
1259 {
1260         struct hid_device *hid = container_of(work, struct hid_device,
1261                                               led_work);
1262         struct hid_field *field;
1263         struct hid_report *report;
1264         int len, ret;
1265         __u8 *buf;
1266
1267         field = hidinput_get_led_field(hid);
1268         if (!field)
1269                 return;
1270
1271         /*
1272          * field->report is accessed unlocked regarding HID core. So there might
1273          * be another incoming SET-LED request from user-space, which changes
1274          * the LED state while we assemble our outgoing buffer. However, this
1275          * doesn't matter as hid_output_report() correctly converts it into a
1276          * boolean value no matter what information is currently set on the LED
1277          * field (even garbage). So the remote device will always get a valid
1278          * request.
1279          * And in case we send a wrong value, a next led worker is spawned
1280          * for every SET-LED request so the following worker will send the
1281          * correct value, guaranteed!
1282          */
1283
1284         report = field->report;
1285
1286         /* use custom SET_REPORT request if possible (asynchronous) */
1287         if (hid->ll_driver->request)
1288                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1289
1290         /* fall back to generic raw-output-report */
1291         len = hid_report_len(report);
1292         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1293         if (!buf)
1294                 return;
1295
1296         hid_output_report(report, buf);
1297         /* synchronous output report */
1298         ret = hid_hw_output_report(hid, buf, len);
1299         if (ret == -ENOSYS)
1300                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1301                                 HID_REQ_SET_REPORT);
1302         kfree(buf);
1303 }
1304
1305 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1306                                 unsigned int code, int value)
1307 {
1308         struct hid_device *hid = input_get_drvdata(dev);
1309         struct hid_field *field;
1310         int offset;
1311
1312         if (type == EV_FF)
1313                 return input_ff_event(dev, type, code, value);
1314
1315         if (type != EV_LED)
1316                 return -1;
1317
1318         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1319                 hid_warn(dev, "event field not found\n");
1320                 return -1;
1321         }
1322
1323         hid_set_field(field, offset, value);
1324
1325         schedule_work(&hid->led_work);
1326         return 0;
1327 }
1328
1329 static int hidinput_open(struct input_dev *dev)
1330 {
1331         struct hid_device *hid = input_get_drvdata(dev);
1332
1333         return hid_hw_open(hid);
1334 }
1335
1336 static void hidinput_close(struct input_dev *dev)
1337 {
1338         struct hid_device *hid = input_get_drvdata(dev);
1339
1340         hid_hw_close(hid);
1341 }
1342
1343 static void report_features(struct hid_device *hid)
1344 {
1345         struct hid_driver *drv = hid->driver;
1346         struct hid_report_enum *rep_enum;
1347         struct hid_report *rep;
1348         int i, j;
1349
1350         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1351         list_for_each_entry(rep, &rep_enum->report_list, list)
1352                 for (i = 0; i < rep->maxfield; i++) {
1353                         /* Ignore if report count is out of bounds. */
1354                         if (rep->field[i]->report_count < 1)
1355                                 continue;
1356
1357                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1358                                 /* Verify if Battery Strength feature is available */
1359                                 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1360
1361                                 if (drv->feature_mapping)
1362                                         drv->feature_mapping(hid, rep->field[i],
1363                                                              rep->field[i]->usage + j);
1364                         }
1365                 }
1366 }
1367
1368 static struct hid_input *hidinput_allocate(struct hid_device *hid)
1369 {
1370         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1371         struct input_dev *input_dev = input_allocate_device();
1372         if (!hidinput || !input_dev) {
1373                 kfree(hidinput);
1374                 input_free_device(input_dev);
1375                 hid_err(hid, "Out of memory during hid input probe\n");
1376                 return NULL;
1377         }
1378
1379         input_set_drvdata(input_dev, hid);
1380         input_dev->event = hidinput_input_event;
1381         input_dev->open = hidinput_open;
1382         input_dev->close = hidinput_close;
1383         input_dev->setkeycode = hidinput_setkeycode;
1384         input_dev->getkeycode = hidinput_getkeycode;
1385
1386         input_dev->name = hid->name;
1387         input_dev->phys = hid->phys;
1388         input_dev->uniq = hid->uniq;
1389         input_dev->id.bustype = hid->bus;
1390         input_dev->id.vendor  = hid->vendor;
1391         input_dev->id.product = hid->product;
1392         input_dev->id.version = hid->version;
1393         input_dev->dev.parent = &hid->dev;
1394         hidinput->input = input_dev;
1395         list_add_tail(&hidinput->list, &hid->inputs);
1396
1397         return hidinput;
1398 }
1399
1400 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1401 {
1402         int i;
1403         unsigned long r = 0;
1404
1405         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1406                 r |= hidinput->input->evbit[i];
1407
1408         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1409                 r |= hidinput->input->keybit[i];
1410
1411         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1412                 r |= hidinput->input->relbit[i];
1413
1414         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1415                 r |= hidinput->input->absbit[i];
1416
1417         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1418                 r |= hidinput->input->mscbit[i];
1419
1420         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1421                 r |= hidinput->input->ledbit[i];
1422
1423         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1424                 r |= hidinput->input->sndbit[i];
1425
1426         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1427                 r |= hidinput->input->ffbit[i];
1428
1429         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1430                 r |= hidinput->input->swbit[i];
1431
1432         return !!r;
1433 }
1434
1435 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1436                 struct hid_input *hidinput)
1437 {
1438         struct hid_report *report;
1439         int i, k;
1440
1441         list_del(&hidinput->list);
1442         input_free_device(hidinput->input);
1443
1444         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1445                 if (k == HID_OUTPUT_REPORT &&
1446                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1447                         continue;
1448
1449                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1450                                     list) {
1451
1452                         for (i = 0; i < report->maxfield; i++)
1453                                 if (report->field[i]->hidinput == hidinput)
1454                                         report->field[i]->hidinput = NULL;
1455                 }
1456         }
1457
1458         kfree(hidinput);
1459 }
1460
1461 /*
1462  * Register the input device; print a message.
1463  * Configure the input layer interface
1464  * Read all reports and initialize the absolute field values.
1465  */
1466
1467 int hidinput_connect(struct hid_device *hid, unsigned int force)
1468 {
1469         struct hid_driver *drv = hid->driver;
1470         struct hid_report *report;
1471         struct hid_input *hidinput = NULL;
1472         int i, j, k;
1473
1474         INIT_LIST_HEAD(&hid->inputs);
1475         INIT_WORK(&hid->led_work, hidinput_led_worker);
1476
1477         if (!force) {
1478                 for (i = 0; i < hid->maxcollection; i++) {
1479                         struct hid_collection *col = &hid->collection[i];
1480                         if (col->type == HID_COLLECTION_APPLICATION ||
1481                                         col->type == HID_COLLECTION_PHYSICAL)
1482                                 if (IS_INPUT_APPLICATION(col->usage))
1483                                         break;
1484                 }
1485
1486                 if (i == hid->maxcollection)
1487                         return -1;
1488         }
1489
1490         report_features(hid);
1491
1492         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1493                 if (k == HID_OUTPUT_REPORT &&
1494                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1495                         continue;
1496
1497                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1498
1499                         if (!report->maxfield)
1500                                 continue;
1501
1502                         if (!hidinput) {
1503                                 hidinput = hidinput_allocate(hid);
1504                                 if (!hidinput)
1505                                         goto out_unwind;
1506                         }
1507
1508                         for (i = 0; i < report->maxfield; i++)
1509                                 for (j = 0; j < report->field[i]->maxusage; j++)
1510                                         hidinput_configure_usage(hidinput, report->field[i],
1511                                                                  report->field[i]->usage + j);
1512
1513                         if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1514                             !hidinput_has_been_populated(hidinput))
1515                                 continue;
1516
1517                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1518                                 /* This will leave hidinput NULL, so that it
1519                                  * allocates another one if we have more inputs on
1520                                  * the same interface. Some devices (e.g. Happ's
1521                                  * UGCI) cram a lot of unrelated inputs into the
1522                                  * same interface. */
1523                                 hidinput->report = report;
1524                                 if (drv->input_configured &&
1525                                     drv->input_configured(hid, hidinput))
1526                                         goto out_cleanup;
1527                                 if (input_register_device(hidinput->input))
1528                                         goto out_cleanup;
1529                                 hidinput = NULL;
1530                         }
1531                 }
1532         }
1533
1534         if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1535             !hidinput_has_been_populated(hidinput)) {
1536                 /* no need to register an input device not populated */
1537                 hidinput_cleanup_hidinput(hid, hidinput);
1538                 hidinput = NULL;
1539         }
1540
1541         if (list_empty(&hid->inputs)) {
1542                 hid_err(hid, "No inputs registered, leaving\n");
1543                 goto out_unwind;
1544         }
1545
1546         if (hidinput) {
1547                 if (drv->input_configured &&
1548                     drv->input_configured(hid, hidinput))
1549                         goto out_cleanup;
1550                 if (input_register_device(hidinput->input))
1551                         goto out_cleanup;
1552         }
1553
1554         return 0;
1555
1556 out_cleanup:
1557         list_del(&hidinput->list);
1558         input_free_device(hidinput->input);
1559         kfree(hidinput);
1560 out_unwind:
1561         /* unwind the ones we already registered */
1562         hidinput_disconnect(hid);
1563
1564         return -1;
1565 }
1566 EXPORT_SYMBOL_GPL(hidinput_connect);
1567
1568 void hidinput_disconnect(struct hid_device *hid)
1569 {
1570         struct hid_input *hidinput, *next;
1571
1572         hidinput_cleanup_battery(hid);
1573
1574         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1575                 list_del(&hidinput->list);
1576                 input_unregister_device(hidinput->input);
1577                 kfree(hidinput);
1578         }
1579
1580         /* led_work is spawned by input_dev callbacks, but doesn't access the
1581          * parent input_dev at all. Once all input devices are removed, we
1582          * know that led_work will never get restarted, so we can cancel it
1583          * synchronously and are safe. */
1584         cancel_work_sync(&hid->led_work);
1585 }
1586 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1587