drivers/hid/hid-input.c

   1 /*
   2  *  Copyright (c) 2000-2001 Vojtech Pavlik
   3  *  Copyright (c) 2006-2010 Jiri Kosina
   4  *
   5  *  HID to Linux Input mapping
   6  */
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  * Should you need to contact me, the author, you can do so either by
  24  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  25  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/slab.h>
  30 #include <linux/kernel.h>
  31
  32 #include <linux/hid.h>
  33 #include <linux/hid-debug.h>
  34
  35 #include "hid-ids.h"
  36
  37 #define unk     KEY_UNKNOWN
  38
  39 static const unsigned char hid_keyboard[256] = {
  40           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  41          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  42           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  43          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  44          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  45         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  46          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  47         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  48         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  49         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
  50         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  51         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  52         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  53         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
  54          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  55         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  56 };
  57
  58 static const struct {
  59         __s32 x;
  60         __s32 y;
  61 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  62
  63 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  64 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  65 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  66 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
  67
  68 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  69                 &max, EV_ABS, (c))
  70 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  71                 &max, EV_KEY, (c))
  72
  73 static bool match_scancode(struct hid_usage *usage,
  74                            unsigned int cur_idx, unsigned int scancode)
  75 {
  76         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
  77 }
  78
  79 static bool match_keycode(struct hid_usage *usage,
  80                           unsigned int cur_idx, unsigned int keycode)
  81 {
  82         /*
  83          * We should exclude unmapped usages when doing lookup by keycode.
  84          */
  85         return (usage->type == EV_KEY && usage->code == keycode);
  86 }
  87
  88 static bool match_index(struct hid_usage *usage,
  89                         unsigned int cur_idx, unsigned int idx)
  90 {
  91         return cur_idx == idx;
  92 }
  93
  94 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
  95                                 unsigned int cur_idx, unsigned int val);
  96
  97 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
  98                                            hid_usage_cmp_t match,
  99                                            unsigned int value,
 100                                            unsigned int *usage_idx)
 101 {
 102         unsigned int i, j, k, cur_idx = 0;
 103         struct hid_report *report;
 104         struct hid_usage *usage;
 105
 106         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 107                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 108                         for (i = 0; i < report->maxfield; i++) {
 109                                 for (j = 0; j < report->field[i]->maxusage; j++) {
 110                                         usage = report->field[i]->usage + j;
 111                                         if (usage->type == EV_KEY || usage->type == 0) {
 112                                                 if (match(usage, cur_idx, value)) {
 113                                                         if (usage_idx)
 114                                                                 *usage_idx = cur_idx;
 115                                                         return usage;
 116                                                 }
 117                                                 cur_idx++;
 118                                         }
 119                                 }
 120                         }
 121                 }
 122         }
 123         return NULL;
 124 }
 125
 126 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 127                                         const struct input_keymap_entry *ke,
 128                                         unsigned int *index)
 129 {
 130         struct hid_usage *usage;
 131         unsigned int scancode;
 132
 133         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 134                 usage = hidinput_find_key(hid, match_index, ke->index, index);
 135         else if (input_scancode_to_scalar(ke, &scancode) == 0)
 136                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
 137         else
 138                 usage = NULL;
 139
 140         return usage;
 141 }
 142
 143 static int hidinput_getkeycode(struct input_dev *dev,
 144                                struct input_keymap_entry *ke)
 145 {
 146         struct hid_device *hid = input_get_drvdata(dev);
 147         struct hid_usage *usage;
 148         unsigned int scancode, index;
 149
 150         usage = hidinput_locate_usage(hid, ke, &index);
 151         if (usage) {
 152                 ke->keycode = usage->type == EV_KEY ?
 153                                 usage->code : KEY_RESERVED;
 154                 ke->index = index;
 155                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 156                 ke->len = sizeof(scancode);
 157                 memcpy(ke->scancode, &scancode, sizeof(scancode));
 158                 return 0;
 159         }
 160
 161         return -EINVAL;
 162 }
 163
 164 static int hidinput_setkeycode(struct input_dev *dev,
 165                                const struct input_keymap_entry *ke,
 166                                unsigned int *old_keycode)
 167 {
 168         struct hid_device *hid = input_get_drvdata(dev);
 169         struct hid_usage *usage;
 170
 171         usage = hidinput_locate_usage(hid, ke, NULL);
 172         if (usage) {
 173                 *old_keycode = usage->type == EV_KEY ?
 174                                 usage->code : KEY_RESERVED;
 175                 usage->code = ke->keycode;
 176
 177                 clear_bit(*old_keycode, dev->keybit);
 178                 set_bit(usage->code, dev->keybit);
 179                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
 180                         usage->code, usage->hid);
 181
 182                 /*
 183                  * Set the keybit for the old keycode if the old keycode is used
 184                  * by another key
 185                  */
 186                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 187                         set_bit(*old_keycode, dev->keybit);
 188
 189                 return 0;
 190         }
 191
 192         return -EINVAL;
 193 }
 194
 195
 196 /**
 197  * hidinput_calc_abs_res - calculate an absolute axis resolution
 198  * @field: the HID report field to calculate resolution for
 199  * @code: axis code
 200  *
 201  * The formula is:
 202  *                         (logical_maximum - logical_minimum)
 203  * resolution = ----------------------------------------------------------
 204  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 205  *
 206  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 207  *
 208  * Only exponent 1 length units are processed. Centimeters and inches are
 209  * converted to millimeters. Degrees are converted to radians.
 210  */
 211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 212 {
 213         __s32 unit_exponent = field->unit_exponent;
 214         __s32 logical_extents = field->logical_maximum -
 215                                         field->logical_minimum;
 216         __s32 physical_extents = field->physical_maximum -
 217                                         field->physical_minimum;
 218         __s32 prev;
 219
 220         /* Check if the extents are sane */
 221         if (logical_extents <= 0 || physical_extents <= 0)
 222                 return 0;
 223
 224         /*
 225          * Verify and convert units.
 226          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 227          */
 228         switch (code) {
 229         case ABS_X:
 230         case ABS_Y:
 231         case ABS_Z:
 232         case ABS_MT_POSITION_X:
 233         case ABS_MT_POSITION_Y:
 234         case ABS_MT_TOOL_X:
 235         case ABS_MT_TOOL_Y:
 236         case ABS_MT_TOUCH_MAJOR:
 237         case ABS_MT_TOUCH_MINOR:
 238                 if (field->unit == 0x11) {              /* If centimeters */
 239                         /* Convert to millimeters */
 240                         unit_exponent += 1;
 241                 } else if (field->unit == 0x13) {       /* If inches */
 242                         /* Convert to millimeters */
 243                         prev = physical_extents;
 244                         physical_extents *= 254;
 245                         if (physical_extents < prev)
 246                                 return 0;
 247                         unit_exponent -= 1;
 248                 } else {
 249                         return 0;
 250                 }
 251                 break;
 252
 253         case ABS_RX:
 254         case ABS_RY:
 255         case ABS_RZ:
 256         case ABS_WHEEL:
 257         case ABS_TILT_X:
 258         case ABS_TILT_Y:
 259                 if (field->unit == 0x14) {              /* If degrees */
 260                         /* Convert to radians */
 261                         prev = logical_extents;
 262                         logical_extents *= 573;
 263                         if (logical_extents < prev)
 264                                 return 0;
 265                         unit_exponent += 1;
 266                 } else if (field->unit != 0x12) {       /* If not radians */
 267                         return 0;
 268                 }
 269                 break;
 270
 271         default:
 272                 return 0;
 273         }
 274
 275         /* Apply negative unit exponent */
 276         for (; unit_exponent < 0; unit_exponent++) {
 277                 prev = logical_extents;
 278                 logical_extents *= 10;
 279                 if (logical_extents < prev)
 280                         return 0;
 281         }
 282         /* Apply positive unit exponent */
 283         for (; unit_exponent > 0; unit_exponent--) {
 284                 prev = physical_extents;
 285                 physical_extents *= 10;
 286                 if (physical_extents < prev)
 287                         return 0;
 288         }
 289
 290         /* Calculate resolution */
 291         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 292 }
 293 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 294
 295 #ifdef CONFIG_HID_BATTERY_STRENGTH
 296 static enum power_supply_property hidinput_battery_props[] = {
 297         POWER_SUPPLY_PROP_PRESENT,
 298         POWER_SUPPLY_PROP_ONLINE,
 299         POWER_SUPPLY_PROP_CAPACITY,
 300         POWER_SUPPLY_PROP_MODEL_NAME,
 301         POWER_SUPPLY_PROP_STATUS,
 302         POWER_SUPPLY_PROP_SCOPE,
 303 };
 304
 305 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 306 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 307 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 308
 309 static const struct hid_device_id hid_battery_quirks[] = {
 310         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 311                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 312           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 313         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 314                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 315           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 316         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 317                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 318           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 319         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 320                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 321           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 322         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 323                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 324           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 325         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 326                 USB_DEVICE_ID_ELECOM_BM084),
 327           HID_BATTERY_QUIRK_IGNORE },
 328         {}
 329 };
 330
 331 static unsigned find_battery_quirk(struct hid_device *hdev)
 332 {
 333         unsigned quirks = 0;
 334         const struct hid_device_id *match;
 335
 336         match = hid_match_id(hdev, hid_battery_quirks);
 337         if (match != NULL)
 338                 quirks = match->driver_data;
 339
 340         return quirks;
 341 }
 342
 343 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 344                                            int value)
 345 {
 346         if (dev->battery_min < dev->battery_max &&
 347             value >= dev->battery_min && value <= dev->battery_max)
 348                 value = ((value - dev->battery_min) * 100) /
 349                         (dev->battery_max - dev->battery_min);
 350
 351         return value;
 352 }
 353
 354 static int hidinput_query_battery_capacity(struct hid_device *dev)
 355 {
 356         u8 *buf;
 357         int ret;
 358
 359         buf = kmalloc(2, GFP_KERNEL);
 360         if (!buf)
 361                 return -ENOMEM;
 362
 363         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 364                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 365         if (ret != 2) {
 366                 kfree(buf);
 367                 return -ENODATA;
 368         }
 369
 370         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 371         kfree(buf);
 372         return ret;
 373 }
 374
 375 static int hidinput_get_battery_property(struct power_supply *psy,
 376                                          enum power_supply_property prop,
 377                                          union power_supply_propval *val)
 378 {
 379         struct hid_device *dev = power_supply_get_drvdata(psy);
 380         int value;
 381         int ret = 0;
 382
 383         switch (prop) {
 384         case POWER_SUPPLY_PROP_PRESENT:
 385         case POWER_SUPPLY_PROP_ONLINE:
 386                 val->intval = 1;
 387                 break;
 388
 389         case POWER_SUPPLY_PROP_CAPACITY:
 390                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 391                     !dev->battery_avoid_query) {
 392                         value = hidinput_query_battery_capacity(dev);
 393                         if (value < 0)
 394                                 return value;
 395                 } else  {
 396                         value = dev->battery_capacity;
 397                 }
 398
 399                 val->intval = value;
 400                 break;
 401
 402         case POWER_SUPPLY_PROP_MODEL_NAME:
 403                 val->strval = dev->name;
 404                 break;
 405
 406         case POWER_SUPPLY_PROP_STATUS:
 407                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 408                     !dev->battery_avoid_query) {
 409                         value = hidinput_query_battery_capacity(dev);
 410                         if (value < 0)
 411                                 return value;
 412
 413                         dev->battery_capacity = value;
 414                         dev->battery_status = HID_BATTERY_QUERIED;
 415                 }
 416
 417                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 418                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 419                 else if (dev->battery_capacity == 100)
 420                         val->intval = POWER_SUPPLY_STATUS_FULL;
 421                 else
 422                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 423                 break;
 424
 425         case POWER_SUPPLY_PROP_SCOPE:
 426                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 427                 break;
 428
 429         default:
 430                 ret = -EINVAL;
 431                 break;
 432         }
 433
 434         return ret;
 435 }
 436
 437 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 438 {
 439         struct power_supply_desc *psy_desc;
 440         struct power_supply_config psy_cfg = { .drv_data = dev, };
 441         unsigned quirks;
 442         s32 min, max;
 443         int error;
 444
 445         if (dev->battery)
 446                 return 0;       /* already initialized? */
 447
 448         quirks = find_battery_quirk(dev);
 449
 450         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 451                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 452
 453         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 454                 return 0;
 455
 456         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 457         if (!psy_desc)
 458                 return -ENOMEM;
 459
 460         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 461                                    strlen(dev->uniq) ?
 462                                         dev->uniq : dev_name(&dev->dev));
 463         if (!psy_desc->name) {
 464                 error = -ENOMEM;
 465                 goto err_free_mem;
 466         }
 467
 468         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 469         psy_desc->properties = hidinput_battery_props;
 470         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 471         psy_desc->use_for_apm = 0;
 472         psy_desc->get_property = hidinput_get_battery_property;
 473
 474         min = field->logical_minimum;
 475         max = field->logical_maximum;
 476
 477         if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 478                 min = 0;
 479                 max = 100;
 480         }
 481
 482         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 483                 report_type = HID_FEATURE_REPORT;
 484
 485         dev->battery_min = min;
 486         dev->battery_max = max;
 487         dev->battery_report_type = report_type;
 488         dev->battery_report_id = field->report->id;
 489
 490         /*
 491          * Stylus is normally not connected to the device and thus we
 492          * can't query the device and get meaningful battery strength.
 493          * We have to wait for the device to report it on its own.
 494          */
 495         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 496                                    field->physical == HID_DG_STYLUS;
 497
 498         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 499         if (IS_ERR(dev->battery)) {
 500                 error = PTR_ERR(dev->battery);
 501                 hid_warn(dev, "can't register power supply: %d\n", error);
 502                 goto err_free_name;
 503         }
 504
 505         power_supply_powers(dev->battery, &dev->dev);
 506         return 0;
 507
 508 err_free_name:
 509         kfree(psy_desc->name);
 510 err_free_mem:
 511         kfree(psy_desc);
 512         dev->battery = NULL;
 513         return error;
 514 }
 515
 516 static void hidinput_cleanup_battery(struct hid_device *dev)
 517 {
 518         const struct power_supply_desc *psy_desc;
 519
 520         if (!dev->battery)
 521                 return;
 522
 523         psy_desc = dev->battery->desc;
 524         power_supply_unregister(dev->battery);
 525         kfree(psy_desc->name);
 526         kfree(psy_desc);
 527         dev->battery = NULL;
 528 }
 529
 530 static void hidinput_update_battery(struct hid_device *dev, int value)
 531 {
 532         int capacity;
 533
 534         if (!dev->battery)
 535                 return;
 536
 537         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 538                 return;
 539
 540         capacity = hidinput_scale_battery_capacity(dev, value);
 541
 542         if (dev->battery_status != HID_BATTERY_REPORTED ||
 543             capacity != dev->battery_capacity) {
 544                 dev->battery_capacity = capacity;
 545                 dev->battery_status = HID_BATTERY_REPORTED;
 546                 power_supply_changed(dev->battery);
 547         }
 548 }
 549 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 550 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 551                                   struct hid_field *field)
 552 {
 553         return 0;
 554 }
 555
 556 static void hidinput_cleanup_battery(struct hid_device *dev)
 557 {
 558 }
 559
 560 static void hidinput_update_battery(struct hid_device *dev, int value)
 561 {
 562 }
 563 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 564
 565 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 566                                      struct hid_usage *usage)
 567 {
 568         struct input_dev *input = hidinput->input;
 569         struct hid_device *device = input_get_drvdata(input);
 570         int max = 0, code;
 571         unsigned long *bit = NULL;
 572
 573         field->hidinput = hidinput;
 574
 575         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 576                 goto ignore;
 577
 578         /* Ignore if report count is out of bounds. */
 579         if (field->report_count < 1)
 580                 goto ignore;
 581
 582         /* only LED usages are supported in output fields */
 583         if (field->report_type == HID_OUTPUT_REPORT &&
 584                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 585                 goto ignore;
 586         }
 587
 588         if (device->driver->input_mapping) {
 589                 int ret = device->driver->input_mapping(device, hidinput, field,
 590                                 usage, &bit, &max);
 591                 if (ret > 0)
 592                         goto mapped;
 593                 if (ret < 0)
 594                         goto ignore;
 595         }
 596
 597         switch (usage->hid & HID_USAGE_PAGE) {
 598         case HID_UP_UNDEFINED:
 599                 goto ignore;
 600
 601         case HID_UP_KEYBOARD:
 602                 set_bit(EV_REP, input->evbit);
 603
 604                 if ((usage->hid & HID_USAGE) < 256) {
 605                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 606                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 607                 } else
 608                         map_key(KEY_UNKNOWN);
 609
 610                 break;
 611
 612         case HID_UP_BUTTON:
 613                 code = ((usage->hid - 1) & HID_USAGE);
 614
 615                 switch (field->application) {
 616                 case HID_GD_MOUSE:
 617                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 618                 case HID_GD_JOYSTICK:
 619                                 if (code <= 0xf)
 620                                         code += BTN_JOYSTICK;
 621                                 else
 622                                         code += BTN_TRIGGER_HAPPY - 0x10;
 623                                 break;
 624                 case HID_GD_GAMEPAD:
 625                                 if (code <= 0xf)
 626                                         code += BTN_GAMEPAD;
 627                                 else
 628                                         code += BTN_TRIGGER_HAPPY - 0x10;
 629                                 break;
 630                 default:
 631                         switch (field->physical) {
 632                         case HID_GD_MOUSE:
 633                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 634                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 635                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 636                         default:              code += BTN_MISC;
 637                         }
 638                 }
 639
 640                 map_key(code);
 641                 break;
 642
 643         case HID_UP_SIMULATION:
 644                 switch (usage->hid & 0xffff) {
 645                 case 0xba: map_abs(ABS_RUDDER);   break;
 646                 case 0xbb: map_abs(ABS_THROTTLE); break;
 647                 case 0xc4: map_abs(ABS_GAS);      break;
 648                 case 0xc5: map_abs(ABS_BRAKE);    break;
 649                 case 0xc8: map_abs(ABS_WHEEL);    break;
 650                 default:   goto ignore;
 651                 }
 652                 break;
 653
 654         case HID_UP_GENDESK:
 655                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 656                         switch (usage->hid & 0xf) {
 657                         case 0x1: map_key_clear(KEY_POWER);  break;
 658                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 659                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 660                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 661                         case 0x5: map_key_clear(KEY_MENU); break;
 662                         case 0x6: map_key_clear(KEY_PROG1); break;
 663                         case 0x7: map_key_clear(KEY_HELP); break;
 664                         case 0x8: map_key_clear(KEY_EXIT); break;
 665                         case 0x9: map_key_clear(KEY_SELECT); break;
 666                         case 0xa: map_key_clear(KEY_RIGHT); break;
 667                         case 0xb: map_key_clear(KEY_LEFT); break;
 668                         case 0xc: map_key_clear(KEY_UP); break;
 669                         case 0xd: map_key_clear(KEY_DOWN); break;
 670                         case 0xe: map_key_clear(KEY_POWER2); break;
 671                         case 0xf: map_key_clear(KEY_RESTART); break;
 672                         default: goto unknown;
 673                         }
 674                         break;
 675                 }
 676
 677                 /*
 678                  * Some lazy vendors declare 255 usages for System Control,
 679                  * leading to the creation of ABS_X|Y axis and too many others.
 680                  * It wouldn't be a problem if joydev doesn't consider the
 681                  * device as a joystick then.
 682                  */
 683                 if (field->application == HID_GD_SYSTEM_CONTROL)
 684                         goto ignore;
 685
 686                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 687                         switch (usage->hid) {
 688                         case HID_GD_UP:    usage->hat_dir = 1; break;
 689                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 690                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 691                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 692                         default: goto unknown;
 693                         }
 694                         if (field->dpad) {
 695                                 map_abs(field->dpad);
 696                                 goto ignore;
 697                         }
 698                         map_abs(ABS_HAT0X);
 699                         break;
 700                 }
 701
 702                 switch (usage->hid) {
 703                 /* These usage IDs map directly to the usage codes. */
 704                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 705                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 706                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 707                                 map_rel(usage->hid & 0xf);
 708                         else
 709                                 map_abs_clear(usage->hid & 0xf);
 710                         break;
 711
 712                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 713                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 714                                 map_rel(usage->hid & 0xf);
 715                         else
 716                                 map_abs(usage->hid & 0xf);
 717                         break;
 718
 719                 case HID_GD_HATSWITCH:
 720                         usage->hat_min = field->logical_minimum;
 721                         usage->hat_max = field->logical_maximum;
 722                         map_abs(ABS_HAT0X);
 723                         break;
 724
 725                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 726                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 727
 728                 case HID_GD_RFKILL_BTN:
 729                         /* MS wireless radio ctl extension, also check CA */
 730                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 731                                 map_key_clear(KEY_RFKILL);
 732                                 /* We need to simulate the btn release */
 733                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 734                                 break;
 735                         }
 736
 737                 default: goto unknown;
 738                 }
 739
 740                 break;
 741
 742         case HID_UP_LED:
 743                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 744                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 745                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 746                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 747                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 748                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 749                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 750                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 751                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 752                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 753                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 754                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 755
 756                 default: goto ignore;
 757                 }
 758                 break;
 759
 760         case HID_UP_DIGITIZER:
 761                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 762                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 763                 else if ((field->application & 0xff) == 0x02) /* Pen */
 764                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 765
 766                 switch (usage->hid & 0xff) {
 767                 case 0x00: /* Undefined */
 768                         goto ignore;
 769
 770                 case 0x30: /* TipPressure */
 771                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 772                                 device->quirks |= HID_QUIRK_NOTOUCH;
 773                                 set_bit(EV_KEY, input->evbit);
 774                                 set_bit(BTN_TOUCH, input->keybit);
 775                         }
 776                         map_abs_clear(ABS_PRESSURE);
 777                         break;
 778
 779                 case 0x32: /* InRange */
 780                         switch (field->physical & 0xff) {
 781                         case 0x21: map_key(BTN_TOOL_MOUSE); break;
 782                         case 0x22: map_key(BTN_TOOL_FINGER); break;
 783                         default: map_key(BTN_TOOL_PEN); break;
 784                         }
 785                         break;
 786
 787                 case 0x3b: /* Battery Strength */
 788                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 789                         usage->type = EV_PWR;
 790                         goto ignore;
 791
 792                 case 0x3c: /* Invert */
 793                         map_key_clear(BTN_TOOL_RUBBER);
 794                         break;
 795
 796                 case 0x3d: /* X Tilt */
 797                         map_abs_clear(ABS_TILT_X);
 798                         break;
 799
 800                 case 0x3e: /* Y Tilt */
 801                         map_abs_clear(ABS_TILT_Y);
 802                         break;
 803
 804                 case 0x33: /* Touch */
 805                 case 0x42: /* TipSwitch */
 806                 case 0x43: /* TipSwitch2 */
 807                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 808                         map_key_clear(BTN_TOUCH);
 809                         break;
 810
 811                 case 0x44: /* BarrelSwitch */
 812                         map_key_clear(BTN_STYLUS);
 813                         break;
 814
 815                 case 0x45: /* ERASER */
 816                         /*
 817                          * This event is reported when eraser tip touches the surface.
 818                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 819                          * tool gets in proximity.
 820                          */
 821                         map_key_clear(BTN_TOUCH);
 822                         break;
 823
 824                 case 0x46: /* TabletPick */
 825                 case 0x5a: /* SecondaryBarrelSwitch */
 826                         map_key_clear(BTN_STYLUS2);
 827                         break;
 828
 829                 case 0x5b: /* TransducerSerialNumber */
 830                         usage->type = EV_MSC;
 831                         usage->code = MSC_SERIAL;
 832                         bit = input->mscbit;
 833                         max = MSC_MAX;
 834                         break;
 835
 836                 default:  goto unknown;
 837                 }
 838                 break;
 839
 840         case HID_UP_TELEPHONY:
 841                 switch (usage->hid & HID_USAGE) {
 842                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 843                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 844                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 845                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 846                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 847                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 848                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 849                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 850                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 851                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 852                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 853                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 854                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 855                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 856                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 857                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 858                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 859                 default: goto ignore;
 860                 }
 861                 break;
 862
 863         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 864                 switch (usage->hid & HID_USAGE) {
 865                 case 0x000: goto ignore;
 866                 case 0x030: map_key_clear(KEY_POWER);           break;
 867                 case 0x031: map_key_clear(KEY_RESTART);         break;
 868                 case 0x032: map_key_clear(KEY_SLEEP);           break;
 869                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 870                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 871                 case 0x036: map_key_clear(BTN_MISC);            break;
 872
 873                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 874                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 875                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 876                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 877                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 878                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 879                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 880                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 881                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 882
 883                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 884                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 885                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 886                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 887                 case 0x069: map_key_clear(KEY_RED);             break;
 888                 case 0x06a: map_key_clear(KEY_GREEN);           break;
 889                 case 0x06b: map_key_clear(KEY_BLUE);            break;
 890                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
 891                 case 0x06d: map_key_clear(KEY_ZOOM);            break;
 892
 893                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 894                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 895                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 896                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 897                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 898                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 899
 900                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 901                 case 0x083: map_key_clear(KEY_LAST);            break;
 902                 case 0x084: map_key_clear(KEY_ENTER);           break;
 903                 case 0x088: map_key_clear(KEY_PC);              break;
 904                 case 0x089: map_key_clear(KEY_TV);              break;
 905                 case 0x08a: map_key_clear(KEY_WWW);             break;
 906                 case 0x08b: map_key_clear(KEY_DVD);             break;
 907                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 908                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 909                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 910                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 911                 case 0x090: map_key_clear(KEY_MEMO);            break;
 912                 case 0x091: map_key_clear(KEY_CD);              break;
 913                 case 0x092: map_key_clear(KEY_VCR);             break;
 914                 case 0x093: map_key_clear(KEY_TUNER);           break;
 915                 case 0x094: map_key_clear(KEY_EXIT);            break;
 916                 case 0x095: map_key_clear(KEY_HELP);            break;
 917                 case 0x096: map_key_clear(KEY_TAPE);            break;
 918                 case 0x097: map_key_clear(KEY_TV2);             break;
 919                 case 0x098: map_key_clear(KEY_SAT);             break;
 920                 case 0x09a: map_key_clear(KEY_PVR);             break;
 921
 922                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 923                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 924                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 925
 926                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 927                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 928                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 929                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 930                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 931                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 932                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 933                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 934                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 935                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 936                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 937                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
 938
 939                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 940                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 941                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 942                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 943                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 944                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 945                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 946                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
 947
 948                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 949                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 950                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 951                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 952                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 953                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 954                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 955                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 956                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 957                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 958                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 959                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 960                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 961                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 962                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 963                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
 964                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 965                 case 0x192: map_key_clear(KEY_CALC);            break;
 966                 case 0x193: map_key_clear(KEY_PLAYER);          break;
 967                 case 0x194: map_key_clear(KEY_FILE);            break;
 968                 case 0x196: map_key_clear(KEY_WWW);             break;
 969                 case 0x199: map_key_clear(KEY_CHAT);            break;
 970                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 971                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 972                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 973                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 974                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
 975                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 976                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 977                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 978                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 979                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 980                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 981                 case 0x1b4: map_key_clear(KEY_FILE);            break;
 982                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 983                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 984                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 985                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 986                 case 0x1bd: map_key_clear(KEY_INFO);            break;
 987                 case 0x201: map_key_clear(KEY_NEW);             break;
 988                 case 0x202: map_key_clear(KEY_OPEN);            break;
 989                 case 0x203: map_key_clear(KEY_CLOSE);           break;
 990                 case 0x204: map_key_clear(KEY_EXIT);            break;
 991                 case 0x207: map_key_clear(KEY_SAVE);            break;
 992                 case 0x208: map_key_clear(KEY_PRINT);           break;
 993                 case 0x209: map_key_clear(KEY_PROPS);           break;
 994                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 995                 case 0x21b: map_key_clear(KEY_COPY);            break;
 996                 case 0x21c: map_key_clear(KEY_CUT);             break;
 997                 case 0x21d: map_key_clear(KEY_PASTE);           break;
 998                 case 0x21f: map_key_clear(KEY_FIND);            break;
 999                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1000                 case 0x222: map_key_clear(KEY_GOTO);            break;
1001                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1002                 case 0x224: map_key_clear(KEY_BACK);            break;
1003                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1004                 case 0x226: map_key_clear(KEY_STOP);            break;
1005                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1006                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1007                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1008                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1009                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1010                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1011                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1012                 case 0x238: map_rel(REL_HWHEEL);                break;
1013                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1014                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1015                 case 0x269: map_key_clear(KEY_INSERT);          break;
1016                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1017                 case 0x279: map_key_clear(KEY_REDO);            break;
1018
1019                 case 0x289: map_key_clear(KEY_REPLY);           break;
1020                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1021                 case 0x28c: map_key_clear(KEY_SEND);            break;
1022
1023                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1024                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1025                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1026                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1027                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1028                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1029
1030                 default: map_key_clear(KEY_UNKNOWN);
1031                 }
1032                 break;
1033
1034         case HID_UP_GENDEVCTRLS:
1035                 switch (usage->hid) {
1036                 case HID_DC_BATTERYSTRENGTH:
1037                         hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1038                         usage->type = EV_PWR;
1039                         goto ignore;
1040                 }
1041                 goto unknown;
1042
1043         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1044                 set_bit(EV_REP, input->evbit);
1045                 switch (usage->hid & HID_USAGE) {
1046                 case 0x021: map_key_clear(KEY_PRINT);           break;
1047                 case 0x070: map_key_clear(KEY_HP);              break;
1048                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1049                 case 0x072: map_key_clear(KEY_SOUND);           break;
1050                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1051                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1052                 case 0x081: map_key_clear(KEY_CHAT);            break;
1053                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1054                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1055                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1056                 case 0x085: map_key_clear(KEY_SPORT);           break;
1057                 case 0x086: map_key_clear(KEY_SHOP);            break;
1058                 default:    goto ignore;
1059                 }
1060                 break;
1061
1062         case HID_UP_HPVENDOR2:
1063                 set_bit(EV_REP, input->evbit);
1064                 switch (usage->hid & HID_USAGE) {
1065                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1066                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1067                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1068                 default:    goto ignore;
1069                 }
1070                 break;
1071
1072         case HID_UP_MSVENDOR:
1073                 goto ignore;
1074
1075         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1076                 set_bit(EV_REP, input->evbit);
1077                 goto ignore;
1078
1079         case HID_UP_LOGIVENDOR:
1080                 /* intentional fallback */
1081         case HID_UP_LOGIVENDOR2:
1082                 /* intentional fallback */
1083         case HID_UP_LOGIVENDOR3:
1084                 goto ignore;
1085
1086         case HID_UP_PID:
1087                 switch (usage->hid & HID_USAGE) {
1088                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1089                 default: goto ignore;
1090                 }
1091                 break;
1092
1093         default:
1094         unknown:
1095                 if (field->report_size == 1) {
1096                         if (field->report->type == HID_OUTPUT_REPORT) {
1097                                 map_led(LED_MISC);
1098                                 break;
1099                         }
1100                         map_key(BTN_MISC);
1101                         break;
1102                 }
1103                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1104                         map_rel(REL_MISC);
1105                         break;
1106                 }
1107                 map_abs(ABS_MISC);
1108                 break;
1109         }
1110
1111 mapped:
1112         if (device->driver->input_mapped && device->driver->input_mapped(device,
1113                                 hidinput, field, usage, &bit, &max) < 0)
1114                 goto ignore;
1115
1116         set_bit(usage->type, input->evbit);
1117
1118         /*
1119          * This part is *really* controversial:
1120          * - HID aims at being generic so we should do our best to export
1121          *   all incoming events
1122          * - HID describes what events are, so there is no reason for ABS_X
1123          *   to be mapped to ABS_Y
1124          * - HID is using *_MISC+N as a default value, but nothing prevents
1125          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1126          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1127          *   processing)
1128          *
1129          * If devices still want to use this (at their own risk), they will
1130          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1131          * the default should be a reliable mapping.
1132          */
1133         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1134                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1135                         usage->code = find_next_zero_bit(bit,
1136                                                          max + 1,
1137                                                          usage->code);
1138                 } else {
1139                         device->status |= HID_STAT_DUP_DETECTED;
1140                         goto ignore;
1141                 }
1142         }
1143
1144         if (usage->code > max)
1145                 goto ignore;
1146
1147         if (usage->type == EV_ABS) {
1148
1149                 int a = field->logical_minimum;
1150                 int b = field->logical_maximum;
1151
1152                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1153                         a = field->logical_minimum = 0;
1154                         b = field->logical_maximum = 255;
1155                 }
1156
1157                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1158                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1159                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1160
1161                 input_abs_set_res(input, usage->code,
1162                                   hidinput_calc_abs_res(field, usage->code));
1163
1164                 /* use a larger default input buffer for MT devices */
1165                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1166                         input_set_events_per_packet(input, 60);
1167         }
1168
1169         if (usage->type == EV_ABS &&
1170             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1171                 int i;
1172                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1173                         input_set_abs_params(input, i, -1, 1, 0, 0);
1174                         set_bit(i, input->absbit);
1175                 }
1176                 if (usage->hat_dir && !field->dpad)
1177                         field->dpad = usage->code;
1178         }
1179
1180         /* for those devices which produce Consumer volume usage as relative,
1181          * we emulate pressing volumeup/volumedown appropriate number of times
1182          * in hidinput_hid_event()
1183          */
1184         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1185                         (usage->code == ABS_VOLUME)) {
1186                 set_bit(KEY_VOLUMEUP, input->keybit);
1187                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1188         }
1189
1190         if (usage->type == EV_KEY) {
1191                 set_bit(EV_MSC, input->evbit);
1192                 set_bit(MSC_SCAN, input->mscbit);
1193         }
1194
1195 ignore:
1196         return;
1197
1198 }
1199
1200 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1201 {
1202         struct input_dev *input;
1203         unsigned *quirks = &hid->quirks;
1204
1205         if (!usage->type)
1206                 return;
1207
1208         if (usage->type == EV_PWR) {
1209                 hidinput_update_battery(hid, value);
1210                 return;
1211         }
1212
1213         if (!field->hidinput)
1214                 return;
1215
1216         input = field->hidinput->input;
1217
1218         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1219                 int hat_dir = usage->hat_dir;
1220                 if (!hat_dir)
1221                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1222                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1223                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1224                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1225                 return;
1226         }
1227
1228         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1229                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1230                 return;
1231         }
1232
1233         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1234                 if (value) {
1235                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1236                         return;
1237                 }
1238                 input_event(input, usage->type, usage->code, 0);
1239                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1240                 return;
1241         }
1242
1243         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1244                 int a = field->logical_minimum;
1245                 int b = field->logical_maximum;
1246                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1247         }
1248
1249         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1250                 dbg_hid("Maximum Effects - %d\n",value);
1251                 return;
1252         }
1253
1254         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1255                 dbg_hid("PID Pool Report\n");
1256                 return;
1257         }
1258
1259         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1260                 return;
1261
1262         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1263                         (usage->code == ABS_VOLUME)) {
1264                 int count = abs(value);
1265                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1266                 int i;
1267
1268                 for (i = 0; i < count; i++) {
1269                         input_event(input, EV_KEY, direction, 1);
1270                         input_sync(input);
1271                         input_event(input, EV_KEY, direction, 0);
1272                         input_sync(input);
1273                 }
1274                 return;
1275         }
1276
1277         /*
1278          * Ignore out-of-range values as per HID specification,
1279          * section 5.10 and 6.2.25, when NULL state bit is present.
1280          * When it's not, clamp the value to match Microsoft's input
1281          * driver as mentioned in "Required HID usages for digitizers":
1282          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1283          *
1284          * The logical_minimum < logical_maximum check is done so that we
1285          * don't unintentionally discard values sent by devices which
1286          * don't specify logical min and max.
1287          */
1288         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1289             (field->logical_minimum < field->logical_maximum)) {
1290                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1291                     (value < field->logical_minimum ||
1292                      value > field->logical_maximum)) {
1293                         dbg_hid("Ignoring out-of-range value %x\n", value);
1294                         return;
1295                 }
1296                 value = clamp(value,
1297                               field->logical_minimum,
1298                               field->logical_maximum);
1299         }
1300
1301         /*
1302          * Ignore reports for absolute data if the data didn't change. This is
1303          * not only an optimization but also fixes 'dead' key reports. Some
1304          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1305          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1306          * can only have one of them physically available. The 'dead' keys
1307          * report constant 0. As all map to the same keycode, they'd confuse
1308          * the input layer. If we filter the 'dead' keys on the HID level, we
1309          * skip the keycode translation and only forward real events.
1310          */
1311         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1312                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1313                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1314             usage->usage_index < field->maxusage &&
1315             value == field->value[usage->usage_index])
1316                 return;
1317
1318         /* report the usage code as scancode if the key status has changed */
1319         if (usage->type == EV_KEY &&
1320             (!test_bit(usage->code, input->key)) == value)
1321                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1322
1323         input_event(input, usage->type, usage->code, value);
1324
1325         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1326             usage->type == EV_KEY && value) {
1327                 input_sync(input);
1328                 input_event(input, usage->type, usage->code, 0);
1329         }
1330 }
1331
1332 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1333 {
1334         struct hid_input *hidinput;
1335
1336         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1337                 return;
1338
1339         list_for_each_entry(hidinput, &hid->inputs, list)
1340                 input_sync(hidinput->input);
1341 }
1342 EXPORT_SYMBOL_GPL(hidinput_report_event);
1343
1344 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1345 {
1346         struct hid_report *report;
1347         int i, j;
1348
1349         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1350                 for (i = 0; i < report->maxfield; i++) {
1351                         *field = report->field[i];
1352                         for (j = 0; j < (*field)->maxusage; j++)
1353                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1354                                         return j;
1355                 }
1356         }
1357         return -1;
1358 }
1359 EXPORT_SYMBOL_GPL(hidinput_find_field);
1360
1361 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1362 {
1363         struct hid_report *report;
1364         struct hid_field *field;
1365         int i, j;
1366
1367         list_for_each_entry(report,
1368                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1369                             list) {
1370                 for (i = 0; i < report->maxfield; i++) {
1371                         field = report->field[i];
1372                         for (j = 0; j < field->maxusage; j++)
1373                                 if (field->usage[j].type == EV_LED)
1374                                         return field;
1375                 }
1376         }
1377         return NULL;
1378 }
1379 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1380
1381 unsigned int hidinput_count_leds(struct hid_device *hid)
1382 {
1383         struct hid_report *report;
1384         struct hid_field *field;
1385         int i, j;
1386         unsigned int count = 0;
1387
1388         list_for_each_entry(report,
1389                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1390                             list) {
1391                 for (i = 0; i < report->maxfield; i++) {
1392                         field = report->field[i];
1393                         for (j = 0; j < field->maxusage; j++)
1394                                 if (field->usage[j].type == EV_LED &&
1395                                     field->value[j])
1396                                         count += 1;
1397                 }
1398         }
1399         return count;
1400 }
1401 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1402
1403 static void hidinput_led_worker(struct work_struct *work)
1404 {
1405         struct hid_device *hid = container_of(work, struct hid_device,
1406                                               led_work);
1407         struct hid_field *field;
1408         struct hid_report *report;
1409         int ret;
1410         u32 len;
1411         __u8 *buf;
1412
1413         field = hidinput_get_led_field(hid);
1414         if (!field)
1415                 return;
1416
1417         /*
1418          * field->report is accessed unlocked regarding HID core. So there might
1419          * be another incoming SET-LED request from user-space, which changes
1420          * the LED state while we assemble our outgoing buffer. However, this
1421          * doesn't matter as hid_output_report() correctly converts it into a
1422          * boolean value no matter what information is currently set on the LED
1423          * field (even garbage). So the remote device will always get a valid
1424          * request.
1425          * And in case we send a wrong value, a next led worker is spawned
1426          * for every SET-LED request so the following worker will send the
1427          * correct value, guaranteed!
1428          */
1429
1430         report = field->report;
1431
1432         /* use custom SET_REPORT request if possible (asynchronous) */
1433         if (hid->ll_driver->request)
1434                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1435
1436         /* fall back to generic raw-output-report */
1437         len = hid_report_len(report);
1438         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1439         if (!buf)
1440                 return;
1441
1442         hid_output_report(report, buf);
1443         /* synchronous output report */
1444         ret = hid_hw_output_report(hid, buf, len);
1445         if (ret == -ENOSYS)
1446                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1447                                 HID_REQ_SET_REPORT);
1448         kfree(buf);
1449 }
1450
1451 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1452                                 unsigned int code, int value)
1453 {
1454         struct hid_device *hid = input_get_drvdata(dev);
1455         struct hid_field *field;
1456         int offset;
1457
1458         if (type == EV_FF)
1459                 return input_ff_event(dev, type, code, value);
1460
1461         if (type != EV_LED)
1462                 return -1;
1463
1464         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1465                 hid_warn(dev, "event field not found\n");
1466                 return -1;
1467         }
1468
1469         hid_set_field(field, offset, value);
1470
1471         schedule_work(&hid->led_work);
1472         return 0;
1473 }
1474
1475 static int hidinput_open(struct input_dev *dev)
1476 {
1477         struct hid_device *hid = input_get_drvdata(dev);
1478
1479         return hid_hw_open(hid);
1480 }
1481
1482 static void hidinput_close(struct input_dev *dev)
1483 {
1484         struct hid_device *hid = input_get_drvdata(dev);
1485
1486         hid_hw_close(hid);
1487 }
1488
1489 static void report_features(struct hid_device *hid)
1490 {
1491         struct hid_driver *drv = hid->driver;
1492         struct hid_report_enum *rep_enum;
1493         struct hid_report *rep;
1494         struct hid_usage *usage;
1495         int i, j;
1496
1497         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1498         list_for_each_entry(rep, &rep_enum->report_list, list)
1499                 for (i = 0; i < rep->maxfield; i++) {
1500                         /* Ignore if report count is out of bounds. */
1501                         if (rep->field[i]->report_count < 1)
1502                                 continue;
1503
1504                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1505                                 usage = &rep->field[i]->usage[j];
1506
1507                                 /* Verify if Battery Strength feature is available */
1508                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1509                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1510                                                                rep->field[i]);
1511
1512                                 if (drv->feature_mapping)
1513                                         drv->feature_mapping(hid, rep->field[i], usage);
1514                         }
1515                 }
1516 }
1517
1518 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1519                                            unsigned int application)
1520 {
1521         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1522         struct input_dev *input_dev = input_allocate_device();
1523         const char *suffix = NULL;
1524         size_t suffix_len, name_len;
1525
1526         if (!hidinput || !input_dev)
1527                 goto fail;
1528
1529         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1530             hid->maxapplication > 1) {
1531                 switch (application) {
1532                 case HID_GD_KEYBOARD:
1533                         suffix = "Keyboard";
1534                         break;
1535                 case HID_GD_KEYPAD:
1536                         suffix = "Keypad";
1537                         break;
1538                 case HID_GD_MOUSE:
1539                         suffix = "Mouse";
1540                         break;
1541                 case HID_DG_STYLUS:
1542                         suffix = "Pen";
1543                         break;
1544                 case HID_DG_TOUCHSCREEN:
1545                         suffix = "Touchscreen";
1546                         break;
1547                 case HID_DG_TOUCHPAD:
1548                         suffix = "Touchpad";
1549                         break;
1550                 case HID_GD_SYSTEM_CONTROL:
1551                         suffix = "System Control";
1552                         break;
1553                 case HID_CP_CONSUMER_CONTROL:
1554                         suffix = "Consumer Control";
1555                         break;
1556                 case HID_GD_WIRELESS_RADIO_CTLS:
1557                         suffix = "Wireless Radio Control";
1558                         break;
1559                 case HID_GD_SYSTEM_MULTIAXIS:
1560                         suffix = "System Multi Axis";
1561                         break;
1562                 default:
1563                         break;
1564                 }
1565         }
1566
1567         if (suffix) {
1568                 name_len = strlen(hid->name);
1569                 suffix_len = strlen(suffix);
1570                 if ((name_len < suffix_len) ||
1571                     strcmp(hid->name + name_len - suffix_len, suffix)) {
1572                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1573                                                    hid->name, suffix);
1574                         if (!hidinput->name)
1575                                 goto fail;
1576                 }
1577         }
1578
1579         input_set_drvdata(input_dev, hid);
1580         input_dev->event = hidinput_input_event;
1581         input_dev->open = hidinput_open;
1582         input_dev->close = hidinput_close;
1583         input_dev->setkeycode = hidinput_setkeycode;
1584         input_dev->getkeycode = hidinput_getkeycode;
1585
1586         input_dev->name = hidinput->name ? hidinput->name : hid->name;
1587         input_dev->phys = hid->phys;
1588         input_dev->uniq = hid->uniq;
1589         input_dev->id.bustype = hid->bus;
1590         input_dev->id.vendor  = hid->vendor;
1591         input_dev->id.product = hid->product;
1592         input_dev->id.version = hid->version;
1593         input_dev->dev.parent = &hid->dev;
1594
1595         hidinput->input = input_dev;
1596         hidinput->application = application;
1597         list_add_tail(&hidinput->list, &hid->inputs);
1598
1599         INIT_LIST_HEAD(&hidinput->reports);
1600
1601         return hidinput;
1602
1603 fail:
1604         kfree(hidinput);
1605         input_free_device(input_dev);
1606         hid_err(hid, "Out of memory during hid input probe\n");
1607         return NULL;
1608 }
1609
1610 static bool hidinput_has_been_populated(struct hid_input *hidinput)
1611 {
1612         int i;
1613         unsigned long r = 0;
1614
1615         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1616                 r |= hidinput->input->evbit[i];
1617
1618         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1619                 r |= hidinput->input->keybit[i];
1620
1621         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1622                 r |= hidinput->input->relbit[i];
1623
1624         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1625                 r |= hidinput->input->absbit[i];
1626
1627         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1628                 r |= hidinput->input->mscbit[i];
1629
1630         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1631                 r |= hidinput->input->ledbit[i];
1632
1633         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1634                 r |= hidinput->input->sndbit[i];
1635
1636         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1637                 r |= hidinput->input->ffbit[i];
1638
1639         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1640                 r |= hidinput->input->swbit[i];
1641
1642         return !!r;
1643 }
1644
1645 static void hidinput_cleanup_hidinput(struct hid_device *hid,
1646                 struct hid_input *hidinput)
1647 {
1648         struct hid_report *report;
1649         int i, k;
1650
1651         list_del(&hidinput->list);
1652         input_free_device(hidinput->input);
1653         kfree(hidinput->name);
1654
1655         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1656                 if (k == HID_OUTPUT_REPORT &&
1657                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1658                         continue;
1659
1660                 list_for_each_entry(report, &hid->report_enum[k].report_list,
1661                                     list) {
1662
1663                         for (i = 0; i < report->maxfield; i++)
1664                                 if (report->field[i]->hidinput == hidinput)
1665                                         report->field[i]->hidinput = NULL;
1666                 }
1667         }
1668
1669         kfree(hidinput);
1670 }
1671
1672 static struct hid_input *hidinput_match(struct hid_report *report)
1673 {
1674         struct hid_device *hid = report->device;
1675         struct hid_input *hidinput;
1676
1677         list_for_each_entry(hidinput, &hid->inputs, list) {
1678                 if (hidinput->report &&
1679                     hidinput->report->id == report->id)
1680                         return hidinput;
1681         }
1682
1683         return NULL;
1684 }
1685
1686 static struct hid_input *hidinput_match_application(struct hid_report *report)
1687 {
1688         struct hid_device *hid = report->device;
1689         struct hid_input *hidinput;
1690
1691         list_for_each_entry(hidinput, &hid->inputs, list) {
1692                 if (hidinput->application == report->application)
1693                         return hidinput;
1694         }
1695
1696         return NULL;
1697 }
1698
1699 static inline void hidinput_configure_usages(struct hid_input *hidinput,
1700                                              struct hid_report *report)
1701 {
1702         int i, j;
1703
1704         for (i = 0; i < report->maxfield; i++)
1705                 for (j = 0; j < report->field[i]->maxusage; j++)
1706                         hidinput_configure_usage(hidinput, report->field[i],
1707                                                  report->field[i]->usage + j);
1708 }
1709
1710 /*
1711  * Register the input device; print a message.
1712  * Configure the input layer interface
1713  * Read all reports and initialize the absolute field values.
1714  */
1715
1716 int hidinput_connect(struct hid_device *hid, unsigned int force)
1717 {
1718         struct hid_driver *drv = hid->driver;
1719         struct hid_report *report;
1720         struct hid_input *next, *hidinput = NULL;
1721         unsigned int application;
1722         int i, k;
1723
1724         INIT_LIST_HEAD(&hid->inputs);
1725         INIT_WORK(&hid->led_work, hidinput_led_worker);
1726
1727         hid->status &= ~HID_STAT_DUP_DETECTED;
1728
1729         if (!force) {
1730                 for (i = 0; i < hid->maxcollection; i++) {
1731                         struct hid_collection *col = &hid->collection[i];
1732                         if (col->type == HID_COLLECTION_APPLICATION ||
1733                                         col->type == HID_COLLECTION_PHYSICAL)
1734                                 if (IS_INPUT_APPLICATION(col->usage))
1735                                         break;
1736                 }
1737
1738                 if (i == hid->maxcollection)
1739                         return -1;
1740         }
1741
1742         report_features(hid);
1743
1744         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1745                 if (k == HID_OUTPUT_REPORT &&
1746                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1747                         continue;
1748
1749                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1750
1751                         if (!report->maxfield)
1752                                 continue;
1753
1754                         application = report->application;
1755
1756                         /*
1757                          * Find the previous hidinput report attached
1758                          * to this report id.
1759                          */
1760                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1761                                 hidinput = hidinput_match(report);
1762                         else if (hid->maxapplication > 1 &&
1763                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1764                                 hidinput = hidinput_match_application(report);
1765
1766                         if (!hidinput) {
1767                                 hidinput = hidinput_allocate(hid, application);
1768                                 if (!hidinput)
1769                                         goto out_unwind;
1770                         }
1771
1772                         hidinput_configure_usages(hidinput, report);
1773
1774                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1775                                 hidinput->report = report;
1776
1777                         list_add_tail(&report->hidinput_list,
1778                                       &hidinput->reports);
1779                 }
1780         }
1781
1782         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1783                 if (drv->input_configured &&
1784                     drv->input_configured(hid, hidinput))
1785                         goto out_unwind;
1786
1787                 if (!hidinput_has_been_populated(hidinput)) {
1788                         /* no need to register an input device not populated */
1789                         hidinput_cleanup_hidinput(hid, hidinput);
1790                         continue;
1791                 }
1792
1793                 if (input_register_device(hidinput->input))
1794                         goto out_unwind;
1795                 hidinput->registered = true;
1796         }
1797
1798         if (list_empty(&hid->inputs)) {
1799                 hid_err(hid, "No inputs registered, leaving\n");
1800                 goto out_unwind;
1801         }
1802
1803         if (hid->status & HID_STAT_DUP_DETECTED)
1804                 hid_dbg(hid,
1805                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1806
1807         return 0;
1808
1809 out_unwind:
1810         /* unwind the ones we already registered */
1811         hidinput_disconnect(hid);
1812
1813         return -1;
1814 }
1815 EXPORT_SYMBOL_GPL(hidinput_connect);
1816
1817 void hidinput_disconnect(struct hid_device *hid)
1818 {
1819         struct hid_input *hidinput, *next;
1820
1821         hidinput_cleanup_battery(hid);
1822
1823         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1824                 list_del(&hidinput->list);
1825                 if (hidinput->registered)
1826                         input_unregister_device(hidinput->input);
1827                 else
1828                         input_free_device(hidinput->input);
1829                 kfree(hidinput->name);
1830                 kfree(hidinput);
1831         }
1832
1833         /* led_work is spawned by input_dev callbacks, but doesn't access the
1834          * parent input_dev at all. Once all input devices are removed, we
1835          * know that led_work will never get restarted, so we can cancel it
1836          * synchronously and are safe. */
1837         cancel_work_sync(&hid->led_work);
1838 }
1839 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1840
1841 /**
1842  * hid_scroll_counter_handle_scroll() - Send high- and low-resolution scroll
1843  *                                      events given a high-resolution wheel
1844  *                                      movement.
1845  * @counter: a hid_scroll_counter struct describing the wheel.
1846  * @hi_res_value: the movement of the wheel, in the mouse's high-resolution
1847  *                units.
1848  *
1849  * Given a high-resolution movement, this function converts the movement into
1850  * microns and emits high-resolution scroll events for the input device. It also
1851  * uses the multiplier from &struct hid_scroll_counter to emit low-resolution
1852  * scroll events when appropriate for backwards-compatibility with userspace
1853  * input libraries.
1854  */
1855 void hid_scroll_counter_handle_scroll(struct hid_scroll_counter *counter,
1856                                       int hi_res_value)
1857 {
1858         int low_res_value, remainder, multiplier;
1859
1860         input_report_rel(counter->dev, REL_WHEEL_HI_RES,
1861                          hi_res_value * counter->microns_per_hi_res_unit);
1862
1863         /*
1864          * Update the low-res remainder with the high-res value,
1865          * but reset if the direction has changed.
1866          */
1867         remainder = counter->remainder;
1868         if ((remainder ^ hi_res_value) < 0)
1869                 remainder = 0;
1870         remainder += hi_res_value;
1871
1872         /*
1873          * Then just use the resolution multiplier to see if
1874          * we should send a low-res (aka regular wheel) event.
1875          */
1876         multiplier = counter->resolution_multiplier;
1877         low_res_value = remainder / multiplier;
1878         remainder -= low_res_value * multiplier;
1879         counter->remainder = remainder;
1880
1881         if (low_res_value)
1882                 input_report_rel(counter->dev, REL_WHEEL, low_res_value);
1883 }
1884 EXPORT_SYMBOL_GPL(hid_scroll_counter_handle_scroll);