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  * hidinput_calc_abs_res - calculate an absolute axis resolution
 197  * @field: the HID report field to calculate resolution for
 198  * @code: axis code
 199  *
 200  * The formula is:
 201  *                         (logical_maximum - logical_minimum)
 202  * resolution = ----------------------------------------------------------
 203  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 204  *
 205  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 206  *
 207  * Only exponent 1 length units are processed. Centimeters and inches are
 208  * converted to millimeters. Degrees are converted to radians.
 209  */
 210 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 211 {
 212         __s32 unit_exponent = field->unit_exponent;
 213         __s32 logical_extents = field->logical_maximum -
 214                                         field->logical_minimum;
 215         __s32 physical_extents = field->physical_maximum -
 216                                         field->physical_minimum;
 217         __s32 prev;
 218
 219         /* Check if the extents are sane */
 220         if (logical_extents <= 0 || physical_extents <= 0)
 221                 return 0;
 222
 223         /*
 224          * Verify and convert units.
 225          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 226          */
 227         switch (code) {
 228         case ABS_X:
 229         case ABS_Y:
 230         case ABS_Z:
 231         case ABS_MT_POSITION_X:
 232         case ABS_MT_POSITION_Y:
 233         case ABS_MT_TOOL_X:
 234         case ABS_MT_TOOL_Y:
 235         case ABS_MT_TOUCH_MAJOR:
 236         case ABS_MT_TOUCH_MINOR:
 237                 if (field->unit & 0xffffff00)           /* Not a length */
 238                         return 0;
 239                 unit_exponent += hid_snto32(field->unit >> 4, 4) - 1;
 240                 switch (field->unit & 0xf) {
 241                 case 0x1:                               /* If centimeters */
 242                         /* Convert to millimeters */
 243                         unit_exponent += 1;
 244                         break;
 245                 case 0x3:                               /* If inches */
 246                         /* Convert to millimeters */
 247                         prev = physical_extents;
 248                         physical_extents *= 254;
 249                         if (physical_extents < prev)
 250                                 return 0;
 251                         unit_exponent -= 1;
 252                         break;
 253                 default:
 254                         return 0;
 255                 }
 256                 break;
 257
 258         case ABS_RX:
 259         case ABS_RY:
 260         case ABS_RZ:
 261         case ABS_TILT_X:
 262         case ABS_TILT_Y:
 263                 if (field->unit == 0x14) {              /* If degrees */
 264                         /* Convert to radians */
 265                         prev = logical_extents;
 266                         logical_extents *= 573;
 267                         if (logical_extents < prev)
 268                                 return 0;
 269                         unit_exponent += 1;
 270                 } else if (field->unit != 0x12) {       /* If not radians */
 271                         return 0;
 272                 }
 273                 break;
 274
 275         default:
 276                 return 0;
 277         }
 278
 279         /* Apply negative unit exponent */
 280         for (; unit_exponent < 0; unit_exponent++) {
 281                 prev = logical_extents;
 282                 logical_extents *= 10;
 283                 if (logical_extents < prev)
 284                         return 0;
 285         }
 286         /* Apply positive unit exponent */
 287         for (; unit_exponent > 0; unit_exponent--) {
 288                 prev = physical_extents;
 289                 physical_extents *= 10;
 290                 if (physical_extents < prev)
 291                         return 0;
 292         }
 293
 294         /* Calculate resolution */
 295         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 296 }
 297 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 298
 299 #ifdef CONFIG_HID_BATTERY_STRENGTH
 300 static enum power_supply_property hidinput_battery_props[] = {
 301         POWER_SUPPLY_PROP_PRESENT,
 302         POWER_SUPPLY_PROP_ONLINE,
 303         POWER_SUPPLY_PROP_CAPACITY,
 304         POWER_SUPPLY_PROP_MODEL_NAME,
 305         POWER_SUPPLY_PROP_STATUS,
 306         POWER_SUPPLY_PROP_SCOPE,
 307 };
 308
 309 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 310 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 311
 312 static const struct hid_device_id hid_battery_quirks[] = {
 313         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 314                         USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 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_ANSI),
 321           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 322         {}
 323 };
 324
 325 static unsigned find_battery_quirk(struct hid_device *hdev)
 326 {
 327         unsigned quirks = 0;
 328         const struct hid_device_id *match;
 329
 330         match = hid_match_id(hdev, hid_battery_quirks);
 331         if (match != NULL)
 332                 quirks = match->driver_data;
 333
 334         return quirks;
 335 }
 336
 337 static int hidinput_get_battery_property(struct power_supply *psy,
 338                                          enum power_supply_property prop,
 339                                          union power_supply_propval *val)
 340 {
 341         struct hid_device *dev = container_of(psy, struct hid_device, battery);
 342         int ret = 0;
 343         __u8 *buf;
 344
 345         switch (prop) {
 346         case POWER_SUPPLY_PROP_PRESENT:
 347         case POWER_SUPPLY_PROP_ONLINE:
 348                 val->intval = 1;
 349                 break;
 350
 351         case POWER_SUPPLY_PROP_CAPACITY:
 352
 353                 buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
 354                 if (!buf) {
 355                         ret = -ENOMEM;
 356                         break;
 357                 }
 358                 ret = dev->hid_get_raw_report(dev, dev->battery_report_id,
 359                                               buf, 2,
 360                                               dev->battery_report_type);
 361
 362                 if (ret != 2) {
 363                         ret = -ENODATA;
 364                         kfree(buf);
 365                         break;
 366                 }
 367                 ret = 0;
 368
 369                 if (dev->battery_min < dev->battery_max &&
 370                     buf[1] >= dev->battery_min &&
 371                     buf[1] <= dev->battery_max)
 372                         val->intval = (100 * (buf[1] - dev->battery_min)) /
 373                                 (dev->battery_max - dev->battery_min);
 374                 kfree(buf);
 375                 break;
 376
 377         case POWER_SUPPLY_PROP_MODEL_NAME:
 378                 val->strval = dev->name;
 379                 break;
 380
 381         case POWER_SUPPLY_PROP_STATUS:
 382                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 383                 break;
 384
 385         case POWER_SUPPLY_PROP_SCOPE:
 386                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 387                 break;
 388
 389         default:
 390                 ret = -EINVAL;
 391                 break;
 392         }
 393
 394         return ret;
 395 }
 396
 397 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 398 {
 399         struct power_supply *battery = &dev->battery;
 400         int ret;
 401         unsigned quirks;
 402         s32 min, max;
 403
 404         if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
 405                 return false;   /* no match */
 406
 407         if (battery->name != NULL)
 408                 goto out;       /* already initialized? */
 409
 410         battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
 411         if (battery->name == NULL)
 412                 goto out;
 413
 414         battery->type = POWER_SUPPLY_TYPE_BATTERY;
 415         battery->properties = hidinput_battery_props;
 416         battery->num_properties = ARRAY_SIZE(hidinput_battery_props);
 417         battery->use_for_apm = 0;
 418         battery->get_property = hidinput_get_battery_property;
 419
 420         quirks = find_battery_quirk(dev);
 421
 422         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 423                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 424
 425         min = field->logical_minimum;
 426         max = field->logical_maximum;
 427
 428         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 429                 min = 0;
 430                 max = 100;
 431         }
 432
 433         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 434                 report_type = HID_FEATURE_REPORT;
 435
 436         dev->battery_min = min;
 437         dev->battery_max = max;
 438         dev->battery_report_type = report_type;
 439         dev->battery_report_id = field->report->id;
 440
 441         ret = power_supply_register(&dev->dev, battery);
 442         if (ret != 0) {
 443                 hid_warn(dev, "can't register power supply: %d\n", ret);
 444                 kfree(battery->name);
 445                 battery->name = NULL;
 446         }
 447
 448         power_supply_powers(battery, &dev->dev);
 449
 450 out:
 451         return true;
 452 }
 453
 454 static void hidinput_cleanup_battery(struct hid_device *dev)
 455 {
 456         if (!dev->battery.name)
 457                 return;
 458
 459         power_supply_unregister(&dev->battery);
 460         kfree(dev->battery.name);
 461         dev->battery.name = NULL;
 462 }
 463 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 464 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 465                                    struct hid_field *field)
 466 {
 467         return false;
 468 }
 469
 470 static void hidinput_cleanup_battery(struct hid_device *dev)
 471 {
 472 }
 473 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 474
 475 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 476                                      struct hid_usage *usage)
 477 {
 478         struct input_dev *input = hidinput->input;
 479         struct hid_device *device = input_get_drvdata(input);
 480         int max = 0, code;
 481         unsigned long *bit = NULL;
 482
 483         field->hidinput = hidinput;
 484
 485         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 486                 goto ignore;
 487
 488         /* Ignore if report count is out of bounds. */
 489         if (field->report_count < 1)
 490                 goto ignore;
 491
 492         /* only LED usages are supported in output fields */
 493         if (field->report_type == HID_OUTPUT_REPORT &&
 494                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 495                 goto ignore;
 496         }
 497
 498         if (device->driver->input_mapping) {
 499                 int ret = device->driver->input_mapping(device, hidinput, field,
 500                                 usage, &bit, &max);
 501                 if (ret > 0)
 502                         goto mapped;
 503                 if (ret < 0)
 504                         goto ignore;
 505         }
 506
 507         switch (usage->hid & HID_USAGE_PAGE) {
 508         case HID_UP_UNDEFINED:
 509                 goto ignore;
 510
 511         case HID_UP_KEYBOARD:
 512                 set_bit(EV_REP, input->evbit);
 513
 514                 if ((usage->hid & HID_USAGE) < 256) {
 515                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 516                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 517                 } else
 518                         map_key(KEY_UNKNOWN);
 519
 520                 break;
 521
 522         case HID_UP_BUTTON:
 523                 code = ((usage->hid - 1) & HID_USAGE);
 524
 525                 switch (field->application) {
 526                 case HID_GD_MOUSE:
 527                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 528                 case HID_GD_JOYSTICK:
 529                                 if (code <= 0xf)
 530                                         code += BTN_JOYSTICK;
 531                                 else
 532                                         code += BTN_TRIGGER_HAPPY - 0x10;
 533                                 break;
 534                 case HID_GD_GAMEPAD:
 535                                 if (code <= 0xf)
 536                                         code += BTN_GAMEPAD;
 537                                 else
 538                                         code += BTN_TRIGGER_HAPPY - 0x10;
 539                                 break;
 540                 default:
 541                         switch (field->physical) {
 542                         case HID_GD_MOUSE:
 543                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 544                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 545                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 546                         default:              code += BTN_MISC;
 547                         }
 548                 }
 549
 550                 map_key(code);
 551                 break;
 552
 553         case HID_UP_SIMULATION:
 554                 switch (usage->hid & 0xffff) {
 555                 case 0xba: map_abs(ABS_RUDDER);   break;
 556                 case 0xbb: map_abs(ABS_THROTTLE); break;
 557                 case 0xc4: map_abs(ABS_GAS);      break;
 558                 case 0xc5: map_abs(ABS_BRAKE);    break;
 559                 case 0xc8: map_abs(ABS_WHEEL);    break;
 560                 default:   goto ignore;
 561                 }
 562                 break;
 563
 564         case HID_UP_GENDESK:
 565                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 566                         switch (usage->hid & 0xf) {
 567                         case 0x1: map_key_clear(KEY_POWER);  break;
 568                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 569                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 570                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 571                         case 0x5: map_key_clear(KEY_MENU); break;
 572                         case 0x6: map_key_clear(KEY_PROG1); break;
 573                         case 0x7: map_key_clear(KEY_HELP); break;
 574                         case 0x8: map_key_clear(KEY_EXIT); break;
 575                         case 0x9: map_key_clear(KEY_SELECT); break;
 576                         case 0xa: map_key_clear(KEY_RIGHT); break;
 577                         case 0xb: map_key_clear(KEY_LEFT); break;
 578                         case 0xc: map_key_clear(KEY_UP); break;
 579                         case 0xd: map_key_clear(KEY_DOWN); break;
 580                         case 0xe: map_key_clear(KEY_POWER2); break;
 581                         case 0xf: map_key_clear(KEY_RESTART); break;
 582                         default: goto unknown;
 583                         }
 584                         break;
 585                 }
 586
 587                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 588                         switch (usage->hid) {
 589                         case HID_GD_UP:    usage->hat_dir = 1; break;
 590                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 591                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 592                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 593                         default: goto unknown;
 594                         }
 595                         if (field->dpad) {
 596                                 map_abs(field->dpad);
 597                                 goto ignore;
 598                         }
 599                         map_abs(ABS_HAT0X);
 600                         break;
 601                 }
 602
 603                 switch (usage->hid) {
 604                 /* These usage IDs map directly to the usage codes. */
 605                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 606                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 607                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 608                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 609                                 map_rel(usage->hid & 0xf);
 610                         else
 611                                 map_abs(usage->hid & 0xf);
 612                         break;
 613
 614                 case HID_GD_HATSWITCH:
 615                         usage->hat_min = field->logical_minimum;
 616                         usage->hat_max = field->logical_maximum;
 617                         map_abs(ABS_HAT0X);
 618                         break;
 619
 620                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 621                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 622
 623                 default: goto unknown;
 624                 }
 625
 626                 break;
 627
 628         case HID_UP_LED:
 629                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 630                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 631                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 632                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 633                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 634                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 635                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 636                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 637                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 638                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 639                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 640                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 641
 642                 default: goto ignore;
 643                 }
 644                 break;
 645
 646         case HID_UP_DIGITIZER:
 647                 switch (usage->hid & 0xff) {
 648                 case 0x00: /* Undefined */
 649                         goto ignore;
 650
 651                 case 0x30: /* TipPressure */
 652                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 653                                 device->quirks |= HID_QUIRK_NOTOUCH;
 654                                 set_bit(EV_KEY, input->evbit);
 655                                 set_bit(BTN_TOUCH, input->keybit);
 656                         }
 657                         map_abs_clear(ABS_PRESSURE);
 658                         break;
 659
 660                 case 0x32: /* InRange */
 661                         switch (field->physical & 0xff) {
 662                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 663                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 664                         default: map_key(BTN_TOOL_PEN); break;
 665                         }
 666                         break;
 667
 668                 case 0x3c: /* Invert */
 669                         map_key_clear(BTN_TOOL_RUBBER);
 670                         break;
 671
 672                 case 0x3d: /* X Tilt */
 673                         map_abs_clear(ABS_TILT_X);
 674                         break;
 675
 676                 case 0x3e: /* Y Tilt */
 677                         map_abs_clear(ABS_TILT_Y);
 678                         break;
 679
 680                 case 0x33: /* Touch */
 681                 case 0x42: /* TipSwitch */
 682                 case 0x43: /* TipSwitch2 */
 683                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 684                         map_key_clear(BTN_TOUCH);
 685                         break;
 686
 687                 case 0x44: /* BarrelSwitch */
 688                         map_key_clear(BTN_STYLUS);
 689                         break;
 690
 691                 case 0x46: /* TabletPick */
 692                         map_key_clear(BTN_STYLUS2);
 693                         break;
 694
 695                 default:  goto unknown;
 696                 }
 697                 break;
 698
 699         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 700                 switch (usage->hid & HID_USAGE) {
 701                 case 0x000: goto ignore;
 702                 case 0x030: map_key_clear(KEY_POWER);           break;
 703                 case 0x031: map_key_clear(KEY_RESTART);         break;
 704                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 705                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 706                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 707                 case 0x036: map_key_clear(BTN_MISC);            break;
 708
 709                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 710                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 711                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 712                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 713                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 714                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 715                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 716                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 717                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 718
 719                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 720                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 721                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 722                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 723                 case 0x069: map_key_clear(KEY_RED);             break;
 724                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 725                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 726                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 727                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
 728
 729                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 730                 case 0x083: map_key_clear(KEY_LAST);            break;
 731                 case 0x084: map_key_clear(KEY_ENTER);           break;
 732                 case 0x088: map_key_clear(KEY_PC);              break;
 733                 case 0x089: map_key_clear(KEY_TV);              break;
 734                 case 0x08a: map_key_clear(KEY_WWW);             break;
 735                 case 0x08b: map_key_clear(KEY_DVD);             break;
 736                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 737                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 738                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 739                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 740                 case 0x090: map_key_clear(KEY_MEMO);            break;
 741                 case 0x091: map_key_clear(KEY_CD);              break;
 742                 case 0x092: map_key_clear(KEY_VCR);             break;
 743                 case 0x093: map_key_clear(KEY_TUNER);           break;
 744                 case 0x094: map_key_clear(KEY_EXIT);            break;
 745                 case 0x095: map_key_clear(KEY_HELP);            break;
 746                 case 0x096: map_key_clear(KEY_TAPE);            break;
 747                 case 0x097: map_key_clear(KEY_TV2);             break;
 748                 case 0x098: map_key_clear(KEY_SAT);             break;
 749                 case 0x09a: map_key_clear(KEY_PVR);             break;
 750
 751                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 752                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 753                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 754
 755                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 756                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 757                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 758                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 759                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 760                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 761                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 762                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 763                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 764                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 765                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 766                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 767
 768                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 769                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 770                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 771                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 772                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 773                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 774                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 775
 776                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 777                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 778                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 779                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 780                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 781                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 782                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 783                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 784                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 785                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 786                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 787                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 788                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 789                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 790                 case 0x192: map_key_clear(KEY_CALC);            break;
 791                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 792                 case 0x194: map_key_clear(KEY_FILE);            break;
 793                 case 0x196: map_key_clear(KEY_WWW);             break;
 794                 case 0x199: map_key_clear(KEY_CHAT);            break;
 795                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 796                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 797                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 798                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 799                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 800                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 801                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 802                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 803                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 804                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 805                 case 0x1bd: map_key_clear(KEY_INFO);            break;
 806                 case 0x201: map_key_clear(KEY_NEW);             break;
 807                 case 0x202: map_key_clear(KEY_OPEN);            break;
 808                 case 0x203: map_key_clear(KEY_CLOSE);           break;
 809                 case 0x204: map_key_clear(KEY_EXIT);            break;
 810                 case 0x207: map_key_clear(KEY_SAVE);            break;
 811                 case 0x208: map_key_clear(KEY_PRINT);           break;
 812                 case 0x209: map_key_clear(KEY_PROPS);           break;
 813                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 814                 case 0x21b: map_key_clear(KEY_COPY);            break;
 815                 case 0x21c: map_key_clear(KEY_CUT);             break;
 816                 case 0x21d: map_key_clear(KEY_PASTE);           break;
 817                 case 0x21f: map_key_clear(KEY_FIND);            break;
 818                 case 0x221: map_key_clear(KEY_SEARCH);          break;
 819                 case 0x222: map_key_clear(KEY_GOTO);            break;
 820                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 821                 case 0x224: map_key_clear(KEY_BACK);            break;
 822                 case 0x225: map_key_clear(KEY_FORWARD);         break;
 823                 case 0x226: map_key_clear(KEY_STOP);            break;
 824                 case 0x227: map_key_clear(KEY_REFRESH);         break;
 825                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 826                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
 827                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
 828                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
 829                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
 830                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
 831                 case 0x238: map_rel(REL_HWHEEL);                break;
 832                 case 0x23d: map_key_clear(KEY_EDIT);            break;
 833                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
 834                 case 0x269: map_key_clear(KEY_INSERT);          break;
 835                 case 0x26a: map_key_clear(KEY_DELETE);          break;
 836                 case 0x279: map_key_clear(KEY_REDO);            break;
 837
 838                 case 0x289: map_key_clear(KEY_REPLY);           break;
 839                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
 840                 case 0x28c: map_key_clear(KEY_SEND);            break;
 841
 842                 default:    goto ignore;
 843                 }
 844                 break;
 845
 846         case HID_UP_GENDEVCTRLS:
 847                 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
 848                         goto ignore;
 849                 else
 850                         goto unknown;
 851                 break;
 852
 853         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 854                 set_bit(EV_REP, input->evbit);
 855                 switch (usage->hid & HID_USAGE) {
 856                 case 0x021: map_key_clear(KEY_PRINT);           break;
 857                 case 0x070: map_key_clear(KEY_HP);              break;
 858                 case 0x071: map_key_clear(KEY_CAMERA);          break;
 859                 case 0x072: map_key_clear(KEY_SOUND);           break;
 860                 case 0x073: map_key_clear(KEY_QUESTION);        break;
 861                 case 0x080: map_key_clear(KEY_EMAIL);           break;
 862                 case 0x081: map_key_clear(KEY_CHAT);            break;
 863                 case 0x082: map_key_clear(KEY_SEARCH);          break;
 864                 case 0x083: map_key_clear(KEY_CONNECT);         break;
 865                 case 0x084: map_key_clear(KEY_FINANCE);         break;
 866                 case 0x085: map_key_clear(KEY_SPORT);           break;
 867                 case 0x086: map_key_clear(KEY_SHOP);            break;
 868                 default:    goto ignore;
 869                 }
 870                 break;
 871
 872         case HID_UP_HPVENDOR2:
 873                 set_bit(EV_REP, input->evbit);
 874                 switch (usage->hid & HID_USAGE) {
 875                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
 876                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
 877                 default:    goto ignore;
 878                 }
 879                 break;
 880
 881         case HID_UP_MSVENDOR:
 882                 goto ignore;
 883
 884         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
 885                 set_bit(EV_REP, input->evbit);
 886                 goto ignore;
 887
 888         case HID_UP_LOGIVENDOR:
 889                 goto ignore;
 890
 891         case HID_UP_PID:
 892                 switch (usage->hid & HID_USAGE) {
 893                 case 0xa4: map_key_clear(BTN_DEAD);     break;
 894                 default: goto ignore;
 895                 }
 896                 break;
 897
 898         default:
 899         unknown:
 900                 if (field->report_size == 1) {
 901                         if (field->report->type == HID_OUTPUT_REPORT) {
 902                                 map_led(LED_MISC);
 903                                 break;
 904                         }
 905                         map_key(BTN_MISC);
 906                         break;
 907                 }
 908                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 909                         map_rel(REL_MISC);
 910                         break;
 911                 }
 912                 map_abs(ABS_MISC);
 913                 break;
 914         }
 915
 916 mapped:
 917         if (device->driver->input_mapped && device->driver->input_mapped(device,
 918                                 hidinput, field, usage, &bit, &max) < 0)
 919                 goto ignore;
 920
 921         set_bit(usage->type, input->evbit);
 922
 923         while (usage->code <= max && test_and_set_bit(usage->code, bit))
 924                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
 925
 926         if (usage->code > max)
 927                 goto ignore;
 928
 929
 930         if (usage->type == EV_ABS) {
 931
 932                 int a = field->logical_minimum;
 933                 int b = field->logical_maximum;
 934
 935                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
 936                         a = field->logical_minimum = 0;
 937                         b = field->logical_maximum = 255;
 938                 }
 939
 940                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
 941                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
 942                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 943
 944                 input_abs_set_res(input, usage->code,
 945                                   hidinput_calc_abs_res(field, usage->code));
 946
 947                 /* use a larger default input buffer for MT devices */
 948                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
 949                         input_set_events_per_packet(input, 60);
 950         }
 951
 952         if (usage->type == EV_ABS &&
 953             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
 954                 int i;
 955                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
 956                         input_set_abs_params(input, i, -1, 1, 0, 0);
 957                         set_bit(i, input->absbit);
 958                 }
 959                 if (usage->hat_dir && !field->dpad)
 960                         field->dpad = usage->code;
 961         }
 962
 963         /* for those devices which produce Consumer volume usage as relative,
 964          * we emulate pressing volumeup/volumedown appropriate number of times
 965          * in hidinput_hid_event()
 966          */
 967         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
 968                         (usage->code == ABS_VOLUME)) {
 969                 set_bit(KEY_VOLUMEUP, input->keybit);
 970                 set_bit(KEY_VOLUMEDOWN, input->keybit);
 971         }
 972
 973         if (usage->type == EV_KEY) {
 974                 set_bit(EV_MSC, input->evbit);
 975                 set_bit(MSC_SCAN, input->mscbit);
 976         }
 977
 978 ignore:
 979         return;
 980
 981 }
 982
 983 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
 984 {
 985         struct input_dev *input;
 986         unsigned *quirks = &hid->quirks;
 987
 988         if (!field->hidinput)
 989                 return;
 990
 991         input = field->hidinput->input;
 992
 993         if (!usage->type)
 994                 return;
 995
 996         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 997                 int hat_dir = usage->hat_dir;
 998                 if (!hat_dir)
 999                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1000                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1001                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1002                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1003                 return;
1004         }
1005
1006         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1007                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1008                 return;
1009         }
1010
1011         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1012                 if (value) {
1013                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1014                         return;
1015                 }
1016                 input_event(input, usage->type, usage->code, 0);
1017                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1018                 return;
1019         }
1020
1021         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1022                 int a = field->logical_minimum;
1023                 int b = field->logical_maximum;
1024                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1025         }
1026
1027         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1028                 dbg_hid("Maximum Effects - %d\n",value);
1029                 return;
1030         }
1031
1032         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1033                 dbg_hid("PID Pool Report\n");
1034                 return;
1035         }
1036
1037         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1038                 return;
1039
1040         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1041                         (usage->code == ABS_VOLUME)) {
1042                 int count = abs(value);
1043                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1044                 int i;
1045
1046                 for (i = 0; i < count; i++) {
1047                         input_event(input, EV_KEY, direction, 1);
1048                         input_sync(input);
1049                         input_event(input, EV_KEY, direction, 0);
1050                         input_sync(input);
1051                 }
1052                 return;
1053         }
1054
1055         /*
1056          * Ignore out-of-range values as per HID specification,
1057          * section 5.10 and 6.2.25.
1058          *
1059          * The logical_minimum < logical_maximum check is done so that we
1060          * don't unintentionally discard values sent by devices which
1061          * don't specify logical min and max.
1062          */
1063         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1064             (field->logical_minimum < field->logical_maximum) &&
1065             (value < field->logical_minimum ||
1066              value > field->logical_maximum)) {
1067                 dbg_hid("Ignoring out-of-range value %x\n", value);
1068                 return;
1069         }
1070
1071         /* report the usage code as scancode if the key status has changed */
1072         if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
1073                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1074
1075         input_event(input, usage->type, usage->code, value);
1076
1077         if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
1078                 input_event(input, usage->type, usage->code, 0);
1079 }
1080
1081 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1082 {
1083         struct hid_input *hidinput;
1084
1085         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1086                 return;
1087
1088         list_for_each_entry(hidinput, &hid->inputs, list)
1089                 input_sync(hidinput->input);
1090 }
1091 EXPORT_SYMBOL_GPL(hidinput_report_event);
1092
1093 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1094 {
1095         struct hid_report *report;
1096         int i, j;
1097
1098         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1099                 for (i = 0; i < report->maxfield; i++) {
1100                         *field = report->field[i];
1101                         for (j = 0; j < (*field)->maxusage; j++)
1102                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1103                                         return j;
1104                 }
1105         }
1106         return -1;
1107 }
1108 EXPORT_SYMBOL_GPL(hidinput_find_field);
1109
1110 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1111 {
1112         struct hid_report *report;
1113         struct hid_field *field;
1114         int i, j;
1115
1116         list_for_each_entry(report,
1117                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1118                             list) {
1119                 for (i = 0; i < report->maxfield; i++) {
1120                         field = report->field[i];
1121                         for (j = 0; j < field->maxusage; j++)
1122                                 if (field->usage[j].type == EV_LED)
1123                                         return field;
1124                 }
1125         }
1126         return NULL;
1127 }
1128 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1129
1130 unsigned int hidinput_count_leds(struct hid_device *hid)
1131 {
1132         struct hid_report *report;
1133         struct hid_field *field;
1134         int i, j;
1135         unsigned int count = 0;
1136
1137         list_for_each_entry(report,
1138                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1139                             list) {
1140                 for (i = 0; i < report->maxfield; i++) {
1141                         field = report->field[i];
1142                         for (j = 0; j < field->maxusage; j++)
1143                                 if (field->usage[j].type == EV_LED &&
1144                                     field->value[j])
1145                                         count += 1;
1146                 }
1147         }
1148         return count;
1149 }
1150 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1151
1152 static void hidinput_led_worker(struct work_struct *work)
1153 {
1154         struct hid_device *hid = container_of(work, struct hid_device,
1155                                               led_work);
1156         struct hid_field *field;
1157         struct hid_report *report;
1158         int len;
1159         __u8 *buf;
1160
1161         field = hidinput_get_led_field(hid);
1162         if (!field)
1163                 return;
1164
1165         /*
1166          * field->report is accessed unlocked regarding HID core. So there might
1167          * be another incoming SET-LED request from user-space, which changes
1168          * the LED state while we assemble our outgoing buffer. However, this
1169          * doesn't matter as hid_output_report() correctly converts it into a
1170          * boolean value no matter what information is currently set on the LED
1171          * field (even garbage). So the remote device will always get a valid
1172          * request.
1173          * And in case we send a wrong value, a next led worker is spawned
1174          * for every SET-LED request so the following worker will send the
1175          * correct value, guaranteed!
1176          */
1177
1178         report = field->report;
1179
1180         /* use custom SET_REPORT request if possible (asynchronous) */
1181         if (hid->ll_driver->request)
1182                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1183
1184         /* fall back to generic raw-output-report */
1185         len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
1186         buf = kmalloc(len, GFP_KERNEL);
1187         if (!buf)
1188                 return;
1189
1190         hid_output_report(report, buf);
1191         /* synchronous output report */
1192         hid->hid_output_raw_report(hid, buf, len, HID_OUTPUT_REPORT);
1193         kfree(buf);
1194 }
1195
1196 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1197                                 unsigned int code, int value)
1198 {
1199         struct hid_device *hid = input_get_drvdata(dev);
1200         struct hid_field *field;
1201         int offset;
1202
1203         if (type == EV_FF)
1204                 return input_ff_event(dev, type, code, value);
1205
1206         if (type != EV_LED)
1207                 return -1;
1208
1209         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1210                 hid_warn(dev, "event field not found\n");
1211                 return -1;
1212         }
1213
1214         hid_set_field(field, offset, value);
1215
1216         schedule_work(&hid->led_work);
1217         return 0;
1218 }
1219
1220 static int hidinput_open(struct input_dev *dev)
1221 {
1222         struct hid_device *hid = input_get_drvdata(dev);
1223
1224         return hid_hw_open(hid);
1225 }
1226
1227 static void hidinput_close(struct input_dev *dev)
1228 {
1229         struct hid_device *hid = input_get_drvdata(dev);
1230
1231         hid_hw_close(hid);
1232 }
1233
1234 static void report_features(struct hid_device *hid)
1235 {
1236         struct hid_driver *drv = hid->driver;
1237         struct hid_report_enum *rep_enum;
1238         struct hid_report *rep;
1239         int i, j;
1240
1241         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1242         list_for_each_entry(rep, &rep_enum->report_list, list)
1243                 for (i = 0; i < rep->maxfield; i++) {
1244                         /* Ignore if report count is out of bounds. */
1245                         if (rep->field[i]->report_count < 1)
1246                                 continue;
1247
1248                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1249                                 /* Verify if Battery Strength feature is available */
1250                                 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1251
1252                                 if (drv->feature_mapping)
1253                                         drv->feature_mapping(hid, rep->field[i],
1254                                                              rep->field[i]->usage + j);
1255                         }
1256                 }
1257 }
1258
1259 static struct hid_input *hidinput_allocate(struct hid_device *hid)
1260 {
1261         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1262         struct input_dev *input_dev = input_allocate_device();
1263         if (!hidinput || !input_dev) {
1264                 kfree(hidinput);
1265                 input_free_device(input_dev);
1266                 hid_err(hid, "Out of memory during hid input probe\n");
1267                 return NULL;
1268         }
1269
1270         input_set_drvdata(input_dev, hid);
1271         if (hid->ll_driver->hidinput_input_event)
1272                 input_dev->event = hid->ll_driver->hidinput_input_event;
1273         else if (hid->ll_driver->request || hid->hid_output_raw_report)
1274                 input_dev->event = hidinput_input_event;
1275         input_dev->open = hidinput_open;
1276         input_dev->close = hidinput_close;
1277         input_dev->setkeycode = hidinput_setkeycode;
1278         input_dev->getkeycode = hidinput_getkeycode;
1279
1280         input_dev->name = hid->name;
1281         input_dev->phys = hid->phys;
1282         input_dev->uniq = hid->uniq;
1283         input_dev->id.bustype = hid->bus;
1284         input_dev->id.vendor  = hid->vendor;
1285         input_dev->id.product = hid->product;
1286         input_dev->id.version = hid->version;
1287         input_dev->dev.parent = hid->dev.parent;
1288         hidinput->input = input_dev;
1289         list_add_tail(&hidinput->list, &hid->inputs);
1290
1291         return hidinput;
1292 }
1293
1294 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1295 {
1296         int i;
1297         unsigned long r = 0;
1298
1299         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1300                 r |= hidinput->input->evbit[i];
1301
1302         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1303                 r |= hidinput->input->keybit[i];
1304
1305         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1306                 r |= hidinput->input->relbit[i];
1307
1308         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1309                 r |= hidinput->input->absbit[i];
1310
1311         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1312                 r |= hidinput->input->mscbit[i];
1313
1314         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1315                 r |= hidinput->input->ledbit[i];
1316
1317         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1318                 r |= hidinput->input->sndbit[i];
1319
1320         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1321                 r |= hidinput->input->ffbit[i];
1322
1323         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1324                 r |= hidinput->input->swbit[i];
1325
1326         return !!r;
1327 }
1328
1329 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1330                 struct hid_input *hidinput)
1331 {
1332         struct hid_report *report;
1333         int i, k;
1334
1335         list_del(&hidinput->list);
1336         input_free_device(hidinput->input);
1337
1338         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1339                 if (k == HID_OUTPUT_REPORT &&
1340                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1341                         continue;
1342
1343                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1344                                     list) {
1345
1346                         for (i = 0; i < report->maxfield; i++)
1347                                 if (report->field[i]->hidinput == hidinput)
1348                                         report->field[i]->hidinput = NULL;
1349                 }
1350         }
1351
1352         kfree(hidinput);
1353 }
1354
1355 /*
1356  * Register the input device; print a message.
1357  * Configure the input layer interface
1358  * Read all reports and initialize the absolute field values.
1359  */
1360
1361 int hidinput_connect(struct hid_device *hid, unsigned int force)
1362 {
1363         struct hid_driver *drv = hid->driver;
1364         struct hid_report *report;
1365         struct hid_input *hidinput = NULL;
1366         int i, j, k;
1367
1368         INIT_LIST_HEAD(&hid->inputs);
1369         INIT_WORK(&hid->led_work, hidinput_led_worker);
1370
1371         if (!force) {
1372                 for (i = 0; i < hid->maxcollection; i++) {
1373                         struct hid_collection *col = &hid->collection[i];
1374                         if (col->type == HID_COLLECTION_APPLICATION ||
1375                                         col->type == HID_COLLECTION_PHYSICAL)
1376                                 if (IS_INPUT_APPLICATION(col->usage))
1377                                         break;
1378                 }
1379
1380                 if (i == hid->maxcollection)
1381                         return -1;
1382         }
1383
1384         report_features(hid);
1385
1386         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1387                 if (k == HID_OUTPUT_REPORT &&
1388                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1389                         continue;
1390
1391                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1392
1393                         if (!report->maxfield)
1394                                 continue;
1395
1396                         if (!hidinput) {
1397                                 hidinput = hidinput_allocate(hid);
1398                                 if (!hidinput)
1399                                         goto out_unwind;
1400                         }
1401
1402                         for (i = 0; i < report->maxfield; i++)
1403                                 for (j = 0; j < report->field[i]->maxusage; j++)
1404                                         hidinput_configure_usage(hidinput, report->field[i],
1405                                                                  report->field[i]->usage + j);
1406
1407                         if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1408                             !hidinput_has_been_populated(hidinput))
1409                                 continue;
1410
1411                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1412                                 /* This will leave hidinput NULL, so that it
1413                                  * allocates another one if we have more inputs on
1414                                  * the same interface. Some devices (e.g. Happ's
1415                                  * UGCI) cram a lot of unrelated inputs into the
1416                                  * same interface. */
1417                                 hidinput->report = report;
1418                                 if (drv->input_configured)
1419                                         drv->input_configured(hid, hidinput);
1420                                 if (input_register_device(hidinput->input))
1421                                         goto out_cleanup;
1422                                 hidinput = NULL;
1423                         }
1424                 }
1425         }
1426
1427         if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1428             !hidinput_has_been_populated(hidinput)) {
1429                 /* no need to register an input device not populated */
1430                 hidinput_cleanup_hidinput(hid, hidinput);
1431                 hidinput = NULL;
1432         }
1433
1434         if (list_empty(&hid->inputs)) {
1435                 hid_err(hid, "No inputs registered, leaving\n");
1436                 goto out_unwind;
1437         }
1438
1439         if (hidinput) {
1440                 if (drv->input_configured)
1441                         drv->input_configured(hid, hidinput);
1442                 if (input_register_device(hidinput->input))
1443                         goto out_cleanup;
1444         }
1445
1446         return 0;
1447
1448 out_cleanup:
1449         list_del(&hidinput->list);
1450         input_free_device(hidinput->input);
1451         kfree(hidinput);
1452 out_unwind:
1453         /* unwind the ones we already registered */
1454         hidinput_disconnect(hid);
1455
1456         return -1;
1457 }
1458 EXPORT_SYMBOL_GPL(hidinput_connect);
1459
1460 void hidinput_disconnect(struct hid_device *hid)
1461 {
1462         struct hid_input *hidinput, *next;
1463
1464         hidinput_cleanup_battery(hid);
1465
1466         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1467                 list_del(&hidinput->list);
1468                 input_unregister_device(hidinput->input);
1469                 kfree(hidinput);
1470         }
1471
1472         /* led_work is spawned by input_dev callbacks, but doesn't access the
1473          * parent input_dev at all. Once all input devices are removed, we
1474          * know that led_work will never get restarted, so we can cancel it
1475          * synchronously and are safe. */
1476         cancel_work_sync(&hid->led_work);
1477 }
1478 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1479