drivers/hid/hid-core.c

   1 /*
   2  *  HID support for Linux
   3  *
   4  *  Copyright (c) 1999 Andreas Gal
   5  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7  *  Copyright (c) 2006-2012 Jiri Kosina
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/module.h>
  20 #include <linux/slab.h>
  21 #include <linux/init.h>
  22 #include <linux/kernel.h>
  23 #include <linux/list.h>
  24 #include <linux/mm.h>
  25 #include <linux/spinlock.h>
  26 #include <asm/unaligned.h>
  27 #include <asm/byteorder.h>
  28 #include <linux/input.h>
  29 #include <linux/wait.h>
  30 #include <linux/vmalloc.h>
  31 #include <linux/sched.h>
  32 #include <linux/semaphore.h>
  33
  34 #include <linux/hid.h>
  35 #include <linux/hiddev.h>
  36 #include <linux/hid-debug.h>
  37 #include <linux/hidraw.h>
  38
  39 #include "hid-ids.h"
  40
  41 /*
  42  * Version Information
  43  */
  44
  45 #define DRIVER_DESC "HID core driver"
  46 #define DRIVER_LICENSE "GPL"
  47
  48 int hid_debug = 0;
  49 module_param_named(debug, hid_debug, int, 0600);
  50 MODULE_PARM_DESC(debug, "toggle HID debugging messages");
  51 EXPORT_SYMBOL_GPL(hid_debug);
  52
  53 static int hid_ignore_special_drivers = 0;
  54 module_param_named(ignore_special_drivers, hid_ignore_special_drivers, int, 0600);
  55 MODULE_PARM_DESC(debug, "Ignore any special drivers and handle all devices by generic driver");
  56
  57 /*
  58  * Register a new report for a device.
  59  */
  60
  61 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
  62 {
  63         struct hid_report_enum *report_enum = device->report_enum + type;
  64         struct hid_report *report;
  65
  66         if (id >= HID_MAX_IDS)
  67                 return NULL;
  68         if (report_enum->report_id_hash[id])
  69                 return report_enum->report_id_hash[id];
  70
  71         report = kzalloc(sizeof(struct hid_report), GFP_KERNEL);
  72         if (!report)
  73                 return NULL;
  74
  75         if (id != 0)
  76                 report_enum->numbered = 1;
  77
  78         report->id = id;
  79         report->type = type;
  80         report->size = 0;
  81         report->device = device;
  82         report_enum->report_id_hash[id] = report;
  83
  84         list_add_tail(&report->list, &report_enum->report_list);
  85
  86         return report;
  87 }
  88 EXPORT_SYMBOL_GPL(hid_register_report);
  89
  90 /*
  91  * Register a new field for this report.
  92  */
  93
  94 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
  95 {
  96         struct hid_field *field;
  97
  98         if (report->maxfield == HID_MAX_FIELDS) {
  99                 hid_err(report->device, "too many fields in report\n");
 100                 return NULL;
 101         }
 102
 103         field = kzalloc((sizeof(struct hid_field) +
 104                          usages * sizeof(struct hid_usage) +
 105                          values * sizeof(unsigned)), GFP_KERNEL);
 106         if (!field)
 107                 return NULL;
 108
 109         field->index = report->maxfield++;
 110         report->field[field->index] = field;
 111         field->usage = (struct hid_usage *)(field + 1);
 112         field->value = (s32 *)(field->usage + usages);
 113         field->report = report;
 114
 115         return field;
 116 }
 117
 118 /*
 119  * Open a collection. The type/usage is pushed on the stack.
 120  */
 121
 122 static int open_collection(struct hid_parser *parser, unsigned type)
 123 {
 124         struct hid_collection *collection;
 125         unsigned usage;
 126
 127         usage = parser->local.usage[0];
 128
 129         if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
 130                 hid_err(parser->device, "collection stack overflow\n");
 131                 return -EINVAL;
 132         }
 133
 134         if (parser->device->maxcollection == parser->device->collection_size) {
 135                 collection = kmalloc(sizeof(struct hid_collection) *
 136                                 parser->device->collection_size * 2, GFP_KERNEL);
 137                 if (collection == NULL) {
 138                         hid_err(parser->device, "failed to reallocate collection array\n");
 139                         return -ENOMEM;
 140                 }
 141                 memcpy(collection, parser->device->collection,
 142                         sizeof(struct hid_collection) *
 143                         parser->device->collection_size);
 144                 memset(collection + parser->device->collection_size, 0,
 145                         sizeof(struct hid_collection) *
 146                         parser->device->collection_size);
 147                 kfree(parser->device->collection);
 148                 parser->device->collection = collection;
 149                 parser->device->collection_size *= 2;
 150         }
 151
 152         parser->collection_stack[parser->collection_stack_ptr++] =
 153                 parser->device->maxcollection;
 154
 155         collection = parser->device->collection +
 156                 parser->device->maxcollection++;
 157         collection->type = type;
 158         collection->usage = usage;
 159         collection->level = parser->collection_stack_ptr - 1;
 160
 161         if (type == HID_COLLECTION_APPLICATION)
 162                 parser->device->maxapplication++;
 163
 164         return 0;
 165 }
 166
 167 /*
 168  * Close a collection.
 169  */
 170
 171 static int close_collection(struct hid_parser *parser)
 172 {
 173         if (!parser->collection_stack_ptr) {
 174                 hid_err(parser->device, "collection stack underflow\n");
 175                 return -EINVAL;
 176         }
 177         parser->collection_stack_ptr--;
 178         return 0;
 179 }
 180
 181 /*
 182  * Climb up the stack, search for the specified collection type
 183  * and return the usage.
 184  */
 185
 186 static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
 187 {
 188         struct hid_collection *collection = parser->device->collection;
 189         int n;
 190
 191         for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
 192                 unsigned index = parser->collection_stack[n];
 193                 if (collection[index].type == type)
 194                         return collection[index].usage;
 195         }
 196         return 0; /* we know nothing about this usage type */
 197 }
 198
 199 /*
 200  * Add a usage to the temporary parser table.
 201  */
 202
 203 static int hid_add_usage(struct hid_parser *parser, unsigned usage)
 204 {
 205         if (parser->local.usage_index >= HID_MAX_USAGES) {
 206                 hid_err(parser->device, "usage index exceeded\n");
 207                 return -1;
 208         }
 209         parser->local.usage[parser->local.usage_index] = usage;
 210         parser->local.collection_index[parser->local.usage_index] =
 211                 parser->collection_stack_ptr ?
 212                 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
 213         parser->local.usage_index++;
 214         return 0;
 215 }
 216
 217 /*
 218  * Register a new field for this report.
 219  */
 220
 221 static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
 222 {
 223         struct hid_report *report;
 224         struct hid_field *field;
 225         unsigned usages;
 226         unsigned offset;
 227         unsigned i;
 228
 229         report = hid_register_report(parser->device, report_type, parser->global.report_id);
 230         if (!report) {
 231                 hid_err(parser->device, "hid_register_report failed\n");
 232                 return -1;
 233         }
 234
 235         /* Handle both signed and unsigned cases properly */
 236         if ((parser->global.logical_minimum < 0 &&
 237                 parser->global.logical_maximum <
 238                 parser->global.logical_minimum) ||
 239                 (parser->global.logical_minimum >= 0 &&
 240                 (__u32)parser->global.logical_maximum <
 241                 (__u32)parser->global.logical_minimum)) {
 242                 dbg_hid("logical range invalid 0x%x 0x%x\n",
 243                         parser->global.logical_minimum,
 244                         parser->global.logical_maximum);
 245                 return -1;
 246         }
 247
 248         offset = report->size;
 249         report->size += parser->global.report_size * parser->global.report_count;
 250
 251         if (!parser->local.usage_index) /* Ignore padding fields */
 252                 return 0;
 253
 254         usages = max_t(unsigned, parser->local.usage_index,
 255                                  parser->global.report_count);
 256
 257         field = hid_register_field(report, usages, parser->global.report_count);
 258         if (!field)
 259                 return 0;
 260
 261         field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
 262         field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
 263         field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 264
 265         for (i = 0; i < usages; i++) {
 266                 unsigned j = i;
 267                 /* Duplicate the last usage we parsed if we have excess values */
 268                 if (i >= parser->local.usage_index)
 269                         j = parser->local.usage_index - 1;
 270                 field->usage[i].hid = parser->local.usage[j];
 271                 field->usage[i].collection_index =
 272                         parser->local.collection_index[j];
 273                 field->usage[i].usage_index = i;
 274         }
 275
 276         field->maxusage = usages;
 277         field->flags = flags;
 278         field->report_offset = offset;
 279         field->report_type = report_type;
 280         field->report_size = parser->global.report_size;
 281         field->report_count = parser->global.report_count;
 282         field->logical_minimum = parser->global.logical_minimum;
 283         field->logical_maximum = parser->global.logical_maximum;
 284         field->physical_minimum = parser->global.physical_minimum;
 285         field->physical_maximum = parser->global.physical_maximum;
 286         field->unit_exponent = parser->global.unit_exponent;
 287         field->unit = parser->global.unit;
 288
 289         return 0;
 290 }
 291
 292 /*
 293  * Read data value from item.
 294  */
 295
 296 static u32 item_udata(struct hid_item *item)
 297 {
 298         switch (item->size) {
 299         case 1: return item->data.u8;
 300         case 2: return item->data.u16;
 301         case 4: return item->data.u32;
 302         }
 303         return 0;
 304 }
 305
 306 static s32 item_sdata(struct hid_item *item)
 307 {
 308         switch (item->size) {
 309         case 1: return item->data.s8;
 310         case 2: return item->data.s16;
 311         case 4: return item->data.s32;
 312         }
 313         return 0;
 314 }
 315
 316 /*
 317  * Process a global item.
 318  */
 319
 320 static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
 321 {
 322         __u32 raw_value;
 323         switch (item->tag) {
 324         case HID_GLOBAL_ITEM_TAG_PUSH:
 325
 326                 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
 327                         hid_err(parser->device, "global environment stack overflow\n");
 328                         return -1;
 329                 }
 330
 331                 memcpy(parser->global_stack + parser->global_stack_ptr++,
 332                         &parser->global, sizeof(struct hid_global));
 333                 return 0;
 334
 335         case HID_GLOBAL_ITEM_TAG_POP:
 336
 337                 if (!parser->global_stack_ptr) {
 338                         hid_err(parser->device, "global environment stack underflow\n");
 339                         return -1;
 340                 }
 341
 342                 memcpy(&parser->global, parser->global_stack +
 343                         --parser->global_stack_ptr, sizeof(struct hid_global));
 344                 return 0;
 345
 346         case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 347                 parser->global.usage_page = item_udata(item);
 348                 return 0;
 349
 350         case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 351                 parser->global.logical_minimum = item_sdata(item);
 352                 return 0;
 353
 354         case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 355                 if (parser->global.logical_minimum < 0)
 356                         parser->global.logical_maximum = item_sdata(item);
 357                 else
 358                         parser->global.logical_maximum = item_udata(item);
 359                 return 0;
 360
 361         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 362                 parser->global.physical_minimum = item_sdata(item);
 363                 return 0;
 364
 365         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 366                 if (parser->global.physical_minimum < 0)
 367                         parser->global.physical_maximum = item_sdata(item);
 368                 else
 369                         parser->global.physical_maximum = item_udata(item);
 370                 return 0;
 371
 372         case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 373                 /* Units exponent negative numbers are given through a
 374                  * two's complement.
 375                  * See "6.2.2.7 Global Items" for more information. */
 376                 raw_value = item_udata(item);
 377                 if (!(raw_value & 0xfffffff0))
 378                         parser->global.unit_exponent = hid_snto32(raw_value, 4);
 379                 else
 380                         parser->global.unit_exponent = raw_value;
 381                 return 0;
 382
 383         case HID_GLOBAL_ITEM_TAG_UNIT:
 384                 parser->global.unit = item_udata(item);
 385                 return 0;
 386
 387         case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 388                 parser->global.report_size = item_udata(item);
 389                 if (parser->global.report_size > 128) {
 390                         hid_err(parser->device, "invalid report_size %d\n",
 391                                         parser->global.report_size);
 392                         return -1;
 393                 }
 394                 return 0;
 395
 396         case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 397                 parser->global.report_count = item_udata(item);
 398                 if (parser->global.report_count > HID_MAX_USAGES) {
 399                         hid_err(parser->device, "invalid report_count %d\n",
 400                                         parser->global.report_count);
 401                         return -1;
 402                 }
 403                 return 0;
 404
 405         case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 406                 parser->global.report_id = item_udata(item);
 407                 if (parser->global.report_id == 0 ||
 408                     parser->global.report_id >= HID_MAX_IDS) {
 409                         hid_err(parser->device, "report_id %u is invalid\n",
 410                                 parser->global.report_id);
 411                         return -1;
 412                 }
 413                 return 0;
 414
 415         default:
 416                 hid_err(parser->device, "unknown global tag 0x%x\n", item->tag);
 417                 return -1;
 418         }
 419 }
 420
 421 /*
 422  * Process a local item.
 423  */
 424
 425 static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 426 {
 427         __u32 data;
 428         unsigned n;
 429
 430         data = item_udata(item);
 431
 432         switch (item->tag) {
 433         case HID_LOCAL_ITEM_TAG_DELIMITER:
 434
 435                 if (data) {
 436                         /*
 437                          * We treat items before the first delimiter
 438                          * as global to all usage sets (branch 0).
 439                          * In the moment we process only these global
 440                          * items and the first delimiter set.
 441                          */
 442                         if (parser->local.delimiter_depth != 0) {
 443                                 hid_err(parser->device, "nested delimiters\n");
 444                                 return -1;
 445                         }
 446                         parser->local.delimiter_depth++;
 447                         parser->local.delimiter_branch++;
 448                 } else {
 449                         if (parser->local.delimiter_depth < 1) {
 450                                 hid_err(parser->device, "bogus close delimiter\n");
 451                                 return -1;
 452                         }
 453                         parser->local.delimiter_depth--;
 454                 }
 455                 return 0;
 456
 457         case HID_LOCAL_ITEM_TAG_USAGE:
 458
 459                 if (parser->local.delimiter_branch > 1) {
 460                         dbg_hid("alternative usage ignored\n");
 461                         return 0;
 462                 }
 463
 464                 if (item->size <= 2)
 465                         data = (parser->global.usage_page << 16) + data;
 466
 467                 return hid_add_usage(parser, data);
 468
 469         case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 470
 471                 if (parser->local.delimiter_branch > 1) {
 472                         dbg_hid("alternative usage ignored\n");
 473                         return 0;
 474                 }
 475
 476                 if (item->size <= 2)
 477                         data = (parser->global.usage_page << 16) + data;
 478
 479                 parser->local.usage_minimum = data;
 480                 return 0;
 481
 482         case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 483
 484                 if (parser->local.delimiter_branch > 1) {
 485                         dbg_hid("alternative usage ignored\n");
 486                         return 0;
 487                 }
 488
 489                 if (item->size <= 2)
 490                         data = (parser->global.usage_page << 16) + data;
 491
 492                 for (n = parser->local.usage_minimum; n <= data; n++)
 493                         if (hid_add_usage(parser, n)) {
 494                                 dbg_hid("hid_add_usage failed\n");
 495                                 return -1;
 496                         }
 497                 return 0;
 498
 499         default:
 500
 501                 dbg_hid("unknown local item tag 0x%x\n", item->tag);
 502                 return 0;
 503         }
 504         return 0;
 505 }
 506
 507 /*
 508  * Process a main item.
 509  */
 510
 511 static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
 512 {
 513         __u32 data;
 514         int ret;
 515
 516         data = item_udata(item);
 517
 518         switch (item->tag) {
 519         case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 520                 ret = open_collection(parser, data & 0xff);
 521                 break;
 522         case HID_MAIN_ITEM_TAG_END_COLLECTION:
 523                 ret = close_collection(parser);
 524                 break;
 525         case HID_MAIN_ITEM_TAG_INPUT:
 526                 ret = hid_add_field(parser, HID_INPUT_REPORT, data);
 527                 break;
 528         case HID_MAIN_ITEM_TAG_OUTPUT:
 529                 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
 530                 break;
 531         case HID_MAIN_ITEM_TAG_FEATURE:
 532                 ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
 533                 break;
 534         default:
 535                 hid_err(parser->device, "unknown main item tag 0x%x\n", item->tag);
 536                 ret = 0;
 537         }
 538
 539         memset(&parser->local, 0, sizeof(parser->local));       /* Reset the local parser environment */
 540
 541         return ret;
 542 }
 543
 544 /*
 545  * Process a reserved item.
 546  */
 547
 548 static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
 549 {
 550         dbg_hid("reserved item type, tag 0x%x\n", item->tag);
 551         return 0;
 552 }
 553
 554 /*
 555  * Free a report and all registered fields. The field->usage and
 556  * field->value table's are allocated behind the field, so we need
 557  * only to free(field) itself.
 558  */
 559
 560 static void hid_free_report(struct hid_report *report)
 561 {
 562         unsigned n;
 563
 564         for (n = 0; n < report->maxfield; n++)
 565                 kfree(report->field[n]);
 566         kfree(report);
 567 }
 568
 569 /*
 570  * Close report. This function returns the device
 571  * state to the point prior to hid_open_report().
 572  */
 573 static void hid_close_report(struct hid_device *device)
 574 {
 575         unsigned i, j;
 576
 577         for (i = 0; i < HID_REPORT_TYPES; i++) {
 578                 struct hid_report_enum *report_enum = device->report_enum + i;
 579
 580                 for (j = 0; j < HID_MAX_IDS; j++) {
 581                         struct hid_report *report = report_enum->report_id_hash[j];
 582                         if (report)
 583                                 hid_free_report(report);
 584                 }
 585                 memset(report_enum, 0, sizeof(*report_enum));
 586                 INIT_LIST_HEAD(&report_enum->report_list);
 587         }
 588
 589         kfree(device->rdesc);
 590         device->rdesc = NULL;
 591         device->rsize = 0;
 592
 593         kfree(device->collection);
 594         device->collection = NULL;
 595         device->collection_size = 0;
 596         device->maxcollection = 0;
 597         device->maxapplication = 0;
 598
 599         device->status &= ~HID_STAT_PARSED;
 600 }
 601
 602 /*
 603  * Free a device structure, all reports, and all fields.
 604  */
 605
 606 static void hid_device_release(struct device *dev)
 607 {
 608         struct hid_device *hid = container_of(dev, struct hid_device, dev);
 609
 610         hid_close_report(hid);
 611         kfree(hid->dev_rdesc);
 612         kfree(hid);
 613 }
 614
 615 /*
 616  * Fetch a report description item from the data stream. We support long
 617  * items, though they are not used yet.
 618  */
 619
 620 static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
 621 {
 622         u8 b;
 623
 624         if ((end - start) <= 0)
 625                 return NULL;
 626
 627         b = *start++;
 628
 629         item->type = (b >> 2) & 3;
 630         item->tag  = (b >> 4) & 15;
 631
 632         if (item->tag == HID_ITEM_TAG_LONG) {
 633
 634                 item->format = HID_ITEM_FORMAT_LONG;
 635
 636                 if ((end - start) < 2)
 637                         return NULL;
 638
 639                 item->size = *start++;
 640                 item->tag  = *start++;
 641
 642                 if ((end - start) < item->size)
 643                         return NULL;
 644
 645                 item->data.longdata = start;
 646                 start += item->size;
 647                 return start;
 648         }
 649
 650         item->format = HID_ITEM_FORMAT_SHORT;
 651         item->size = b & 3;
 652
 653         switch (item->size) {
 654         case 0:
 655                 return start;
 656
 657         case 1:
 658                 if ((end - start) < 1)
 659                         return NULL;
 660                 item->data.u8 = *start++;
 661                 return start;
 662
 663         case 2:
 664                 if ((end - start) < 2)
 665                         return NULL;
 666                 item->data.u16 = get_unaligned_le16(start);
 667                 start = (__u8 *)((__le16 *)start + 1);
 668                 return start;
 669
 670         case 3:
 671                 item->size++;
 672                 if ((end - start) < 4)
 673                         return NULL;
 674                 item->data.u32 = get_unaligned_le32(start);
 675                 start = (__u8 *)((__le32 *)start + 1);
 676                 return start;
 677         }
 678
 679         return NULL;
 680 }
 681
 682 static void hid_scan_input_usage(struct hid_parser *parser, u32 usage)
 683 {
 684         struct hid_device *hid = parser->device;
 685
 686         if (usage == HID_DG_CONTACTID)
 687                 hid->group = HID_GROUP_MULTITOUCH;
 688 }
 689
 690 static void hid_scan_feature_usage(struct hid_parser *parser, u32 usage)
 691 {
 692         if (usage == 0xff0000c5 && parser->global.report_count == 256 &&
 693             parser->global.report_size == 8)
 694                 parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8;
 695 }
 696
 697 static void hid_scan_collection(struct hid_parser *parser, unsigned type)
 698 {
 699         struct hid_device *hid = parser->device;
 700
 701         if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&
 702             type == HID_COLLECTION_PHYSICAL)
 703                 hid->group = HID_GROUP_SENSOR_HUB;
 704 }
 705
 706 static int hid_scan_main(struct hid_parser *parser, struct hid_item *item)
 707 {
 708         __u32 data;
 709         int i;
 710
 711         data = item_udata(item);
 712
 713         switch (item->tag) {
 714         case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 715                 hid_scan_collection(parser, data & 0xff);
 716                 break;
 717         case HID_MAIN_ITEM_TAG_END_COLLECTION:
 718                 break;
 719         case HID_MAIN_ITEM_TAG_INPUT:
 720                 for (i = 0; i < parser->local.usage_index; i++)
 721                         hid_scan_input_usage(parser, parser->local.usage[i]);
 722                 break;
 723         case HID_MAIN_ITEM_TAG_OUTPUT:
 724                 break;
 725         case HID_MAIN_ITEM_TAG_FEATURE:
 726                 for (i = 0; i < parser->local.usage_index; i++)
 727                         hid_scan_feature_usage(parser, parser->local.usage[i]);
 728                 break;
 729         }
 730
 731         /* Reset the local parser environment */
 732         memset(&parser->local, 0, sizeof(parser->local));
 733
 734         return 0;
 735 }
 736
 737 /*
 738  * Scan a report descriptor before the device is added to the bus.
 739  * Sets device groups and other properties that determine what driver
 740  * to load.
 741  */
 742 static int hid_scan_report(struct hid_device *hid)
 743 {
 744         struct hid_parser *parser;
 745         struct hid_item item;
 746         __u8 *start = hid->dev_rdesc;
 747         __u8 *end = start + hid->dev_rsize;
 748         static int (*dispatch_type[])(struct hid_parser *parser,
 749                                       struct hid_item *item) = {
 750                 hid_scan_main,
 751                 hid_parser_global,
 752                 hid_parser_local,
 753                 hid_parser_reserved
 754         };
 755
 756         parser = vzalloc(sizeof(struct hid_parser));
 757         if (!parser)
 758                 return -ENOMEM;
 759
 760         parser->device = hid;
 761         hid->group = HID_GROUP_GENERIC;
 762
 763         /*
 764          * The parsing is simpler than the one in hid_open_report() as we should
 765          * be robust against hid errors. Those errors will be raised by
 766          * hid_open_report() anyway.
 767          */
 768         while ((start = fetch_item(start, end, &item)) != NULL)
 769                 dispatch_type[item.type](parser, &item);
 770
 771         /*
 772          * Handle special flags set during scanning.
 773          */
 774         if ((parser->scan_flags & HID_SCAN_FLAG_MT_WIN_8) &&
 775             (hid->group == HID_GROUP_MULTITOUCH))
 776                 hid->group = HID_GROUP_MULTITOUCH_WIN_8;
 777
 778         vfree(parser);
 779         return 0;
 780 }
 781
 782 /**
 783  * hid_parse_report - parse device report
 784  *
 785  * @device: hid device
 786  * @start: report start
 787  * @size: report size
 788  *
 789  * Allocate the device report as read by the bus driver. This function should
 790  * only be called from parse() in ll drivers.
 791  */
 792 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size)
 793 {
 794         hid->dev_rdesc = kmemdup(start, size, GFP_KERNEL);
 795         if (!hid->dev_rdesc)
 796                 return -ENOMEM;
 797         hid->dev_rsize = size;
 798         return 0;
 799 }
 800 EXPORT_SYMBOL_GPL(hid_parse_report);
 801
 802 static const char * const hid_report_names[] = {
 803         "HID_INPUT_REPORT",
 804         "HID_OUTPUT_REPORT",
 805         "HID_FEATURE_REPORT",
 806 };
 807 /**
 808  * hid_validate_values - validate existing device report's value indexes
 809  *
 810  * @device: hid device
 811  * @type: which report type to examine
 812  * @id: which report ID to examine (0 for first)
 813  * @field_index: which report field to examine
 814  * @report_counts: expected number of values
 815  *
 816  * Validate the number of values in a given field of a given report, after
 817  * parsing.
 818  */
 819 struct hid_report *hid_validate_values(struct hid_device *hid,
 820                                        unsigned int type, unsigned int id,
 821                                        unsigned int field_index,
 822                                        unsigned int report_counts)
 823 {
 824         struct hid_report *report;
 825
 826         if (type > HID_FEATURE_REPORT) {
 827                 hid_err(hid, "invalid HID report type %u\n", type);
 828                 return NULL;
 829         }
 830
 831         if (id >= HID_MAX_IDS) {
 832                 hid_err(hid, "invalid HID report id %u\n", id);
 833                 return NULL;
 834         }
 835
 836         /*
 837          * Explicitly not using hid_get_report() here since it depends on
 838          * ->numbered being checked, which may not always be the case when
 839          * drivers go to access report values.
 840          */
 841         report = hid->report_enum[type].report_id_hash[id];
 842         if (!report) {
 843                 hid_err(hid, "missing %s %u\n", hid_report_names[type], id);
 844                 return NULL;
 845         }
 846         if (report->maxfield <= field_index) {
 847                 hid_err(hid, "not enough fields in %s %u\n",
 848                         hid_report_names[type], id);
 849                 return NULL;
 850         }
 851         if (report->field[field_index]->report_count < report_counts) {
 852                 hid_err(hid, "not enough values in %s %u field %u\n",
 853                         hid_report_names[type], id, field_index);
 854                 return NULL;
 855         }
 856         return report;
 857 }
 858 EXPORT_SYMBOL_GPL(hid_validate_values);
 859
 860 /**
 861  * hid_open_report - open a driver-specific device report
 862  *
 863  * @device: hid device
 864  *
 865  * Parse a report description into a hid_device structure. Reports are
 866  * enumerated, fields are attached to these reports.
 867  * 0 returned on success, otherwise nonzero error value.
 868  *
 869  * This function (or the equivalent hid_parse() macro) should only be
 870  * called from probe() in drivers, before starting the device.
 871  */
 872 int hid_open_report(struct hid_device *device)
 873 {
 874         struct hid_parser *parser;
 875         struct hid_item item;
 876         unsigned int size;
 877         __u8 *start;
 878         __u8 *buf;
 879         __u8 *end;
 880         int ret;
 881         static int (*dispatch_type[])(struct hid_parser *parser,
 882                                       struct hid_item *item) = {
 883                 hid_parser_main,
 884                 hid_parser_global,
 885                 hid_parser_local,
 886                 hid_parser_reserved
 887         };
 888
 889         if (WARN_ON(device->status & HID_STAT_PARSED))
 890                 return -EBUSY;
 891
 892         start = device->dev_rdesc;
 893         if (WARN_ON(!start))
 894                 return -ENODEV;
 895         size = device->dev_rsize;
 896
 897         buf = kmemdup(start, size, GFP_KERNEL);
 898         if (buf == NULL)
 899                 return -ENOMEM;
 900
 901         if (device->driver->report_fixup)
 902                 start = device->driver->report_fixup(device, buf, &size);
 903         else
 904                 start = buf;
 905
 906         start = kmemdup(start, size, GFP_KERNEL);
 907         kfree(buf);
 908         if (start == NULL)
 909                 return -ENOMEM;
 910
 911         device->rdesc = start;
 912         device->rsize = size;
 913
 914         parser = vzalloc(sizeof(struct hid_parser));
 915         if (!parser) {
 916                 ret = -ENOMEM;
 917                 goto err;
 918         }
 919
 920         parser->device = device;
 921
 922         end = start + size;
 923
 924         device->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
 925                                      sizeof(struct hid_collection), GFP_KERNEL);
 926         if (!device->collection) {
 927                 ret = -ENOMEM;
 928                 goto err;
 929         }
 930         device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
 931
 932         ret = -EINVAL;
 933         while ((start = fetch_item(start, end, &item)) != NULL) {
 934
 935                 if (item.format != HID_ITEM_FORMAT_SHORT) {
 936                         hid_err(device, "unexpected long global item\n");
 937                         goto err;
 938                 }
 939
 940                 if (dispatch_type[item.type](parser, &item)) {
 941                         hid_err(device, "item %u %u %u %u parsing failed\n",
 942                                 item.format, (unsigned)item.size,
 943                                 (unsigned)item.type, (unsigned)item.tag);
 944                         goto err;
 945                 }
 946
 947                 if (start == end) {
 948                         if (parser->collection_stack_ptr) {
 949                                 hid_err(device, "unbalanced collection at end of report description\n");
 950                                 goto err;
 951                         }
 952                         if (parser->local.delimiter_depth) {
 953                                 hid_err(device, "unbalanced delimiter at end of report description\n");
 954                                 goto err;
 955                         }
 956                         vfree(parser);
 957                         device->status |= HID_STAT_PARSED;
 958                         return 0;
 959                 }
 960         }
 961
 962         hid_err(device, "item fetching failed at offset %d\n", (int)(end - start));
 963 err:
 964         vfree(parser);
 965         hid_close_report(device);
 966         return ret;
 967 }
 968 EXPORT_SYMBOL_GPL(hid_open_report);
 969
 970 /*
 971  * Convert a signed n-bit integer to signed 32-bit integer. Common
 972  * cases are done through the compiler, the screwed things has to be
 973  * done by hand.
 974  */
 975
 976 static s32 snto32(__u32 value, unsigned n)
 977 {
 978         switch (n) {
 979         case 8:  return ((__s8)value);
 980         case 16: return ((__s16)value);
 981         case 32: return ((__s32)value);
 982         }
 983         return value & (1 << (n - 1)) ? value | (-1 << n) : value;
 984 }
 985
 986 s32 hid_snto32(__u32 value, unsigned n)
 987 {
 988         return snto32(value, n);
 989 }
 990 EXPORT_SYMBOL_GPL(hid_snto32);
 991
 992 /*
 993  * Convert a signed 32-bit integer to a signed n-bit integer.
 994  */
 995
 996 static u32 s32ton(__s32 value, unsigned n)
 997 {
 998         s32 a = value >> (n - 1);
 999         if (a && a != -1)
1000                 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
1001         return value & ((1 << n) - 1);
1002 }
1003
1004 /*
1005  * Extract/implement a data field from/to a little endian report (bit array).
1006  *
1007  * Code sort-of follows HID spec:
1008  *     http://www.usb.org/developers/devclass_docs/HID1_11.pdf
1009  *
1010  * While the USB HID spec allows unlimited length bit fields in "report
1011  * descriptors", most devices never use more than 16 bits.
1012  * One model of UPS is claimed to report "LINEV" as a 32-bit field.
1013  * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
1014  */
1015
1016 static __u32 extract(const struct hid_device *hid, __u8 *report,
1017                      unsigned offset, unsigned n)
1018 {
1019         u64 x;
1020
1021         if (n > 32)
1022                 hid_warn(hid, "extract() called with n (%d) > 32! (%s)\n",
1023                          n, current->comm);
1024
1025         report += offset >> 3;  /* adjust byte index */
1026         offset &= 7;            /* now only need bit offset into one byte */
1027         x = get_unaligned_le64(report);
1028         x = (x >> offset) & ((1ULL << n) - 1);  /* extract bit field */
1029         return (u32) x;
1030 }
1031
1032 /*
1033  * "implement" : set bits in a little endian bit stream.
1034  * Same concepts as "extract" (see comments above).
1035  * The data mangled in the bit stream remains in little endian
1036  * order the whole time. It make more sense to talk about
1037  * endianness of register values by considering a register
1038  * a "cached" copy of the little endiad bit stream.
1039  */
1040 static void implement(const struct hid_device *hid, __u8 *report,
1041                       unsigned offset, unsigned n, __u32 value)
1042 {
1043         u64 x;
1044         u64 m = (1ULL << n) - 1;
1045
1046         if (n > 32)
1047                 hid_warn(hid, "%s() called with n (%d) > 32! (%s)\n",
1048                          __func__, n, current->comm);
1049
1050         if (value > m)
1051                 hid_warn(hid, "%s() called with too large value %d! (%s)\n",
1052                          __func__, value, current->comm);
1053         WARN_ON(value > m);
1054         value &= m;
1055
1056         report += offset >> 3;
1057         offset &= 7;
1058
1059         x = get_unaligned_le64(report);
1060         x &= ~(m << offset);
1061         x |= ((u64)value) << offset;
1062         put_unaligned_le64(x, report);
1063 }
1064
1065 /*
1066  * Search an array for a value.
1067  */
1068
1069 static int search(__s32 *array, __s32 value, unsigned n)
1070 {
1071         while (n--) {
1072                 if (*array++ == value)
1073                         return 0;
1074         }
1075         return -1;
1076 }
1077
1078 /**
1079  * hid_match_report - check if driver's raw_event should be called
1080  *
1081  * @hid: hid device
1082  * @report_type: type to match against
1083  *
1084  * compare hid->driver->report_table->report_type to report->type
1085  */
1086 static int hid_match_report(struct hid_device *hid, struct hid_report *report)
1087 {
1088         const struct hid_report_id *id = hid->driver->report_table;
1089
1090         if (!id) /* NULL means all */
1091                 return 1;
1092
1093         for (; id->report_type != HID_TERMINATOR; id++)
1094                 if (id->report_type == HID_ANY_ID ||
1095                                 id->report_type == report->type)
1096                         return 1;
1097         return 0;
1098 }
1099
1100 /**
1101  * hid_match_usage - check if driver's event should be called
1102  *
1103  * @hid: hid device
1104  * @usage: usage to match against
1105  *
1106  * compare hid->driver->usage_table->usage_{type,code} to
1107  * usage->usage_{type,code}
1108  */
1109 static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
1110 {
1111         const struct hid_usage_id *id = hid->driver->usage_table;
1112
1113         if (!id) /* NULL means all */
1114                 return 1;
1115
1116         for (; id->usage_type != HID_ANY_ID - 1; id++)
1117                 if ((id->usage_hid == HID_ANY_ID ||
1118                                 id->usage_hid == usage->hid) &&
1119                                 (id->usage_type == HID_ANY_ID ||
1120                                 id->usage_type == usage->type) &&
1121                                 (id->usage_code == HID_ANY_ID ||
1122                                  id->usage_code == usage->code))
1123                         return 1;
1124         return 0;
1125 }
1126
1127 static void hid_process_event(struct hid_device *hid, struct hid_field *field,
1128                 struct hid_usage *usage, __s32 value, int interrupt)
1129 {
1130         struct hid_driver *hdrv = hid->driver;
1131         int ret;
1132
1133         if (!list_empty(&hid->debug_list))
1134                 hid_dump_input(hid, usage, value);
1135
1136         if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
1137                 ret = hdrv->event(hid, field, usage, value);
1138                 if (ret != 0) {
1139                         if (ret < 0)
1140                                 hid_err(hid, "%s's event failed with %d\n",
1141                                                 hdrv->name, ret);
1142                         return;
1143                 }
1144         }
1145
1146         if (hid->claimed & HID_CLAIMED_INPUT)
1147                 hidinput_hid_event(hid, field, usage, value);
1148         if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
1149                 hid->hiddev_hid_event(hid, field, usage, value);
1150 }
1151
1152 /*
1153  * Analyse a received field, and fetch the data from it. The field
1154  * content is stored for next report processing (we do differential
1155  * reporting to the layer).
1156  */
1157
1158 static void hid_input_field(struct hid_device *hid, struct hid_field *field,
1159                             __u8 *data, int interrupt)
1160 {
1161         unsigned n;
1162         unsigned count = field->report_count;
1163         unsigned offset = field->report_offset;
1164         unsigned size = field->report_size;
1165         __s32 min = field->logical_minimum;
1166         __s32 max = field->logical_maximum;
1167         __s32 *value;
1168
1169         value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC);
1170         if (!value)
1171                 return;
1172
1173         for (n = 0; n < count; n++) {
1174
1175                 value[n] = min < 0 ?
1176                         snto32(extract(hid, data, offset + n * size, size),
1177                                size) :
1178                         extract(hid, data, offset + n * size, size);
1179
1180                 /* Ignore report if ErrorRollOver */
1181                 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
1182                     value[n] >= min && value[n] <= max &&
1183                     field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
1184                         goto exit;
1185         }
1186
1187         for (n = 0; n < count; n++) {
1188
1189                 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
1190                         hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
1191                         continue;
1192                 }
1193
1194                 if (field->value[n] >= min && field->value[n] <= max
1195                         && field->usage[field->value[n] - min].hid
1196                         && search(value, field->value[n], count))
1197                                 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
1198
1199                 if (value[n] >= min && value[n] <= max
1200                         && field->usage[value[n] - min].hid
1201                         && search(field->value, value[n], count))
1202                                 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
1203         }
1204
1205         memcpy(field->value, value, count * sizeof(__s32));
1206 exit:
1207         kfree(value);
1208 }
1209
1210 /*
1211  * Output the field into the report.
1212  */
1213
1214 static void hid_output_field(const struct hid_device *hid,
1215                              struct hid_field *field, __u8 *data)
1216 {
1217         unsigned count = field->report_count;
1218         unsigned offset = field->report_offset;
1219         unsigned size = field->report_size;
1220         unsigned n;
1221
1222         for (n = 0; n < count; n++) {
1223                 if (field->logical_minimum < 0) /* signed values */
1224                         implement(hid, data, offset + n * size, size,
1225                                   s32ton(field->value[n], size));
1226                 else                            /* unsigned values */
1227                         implement(hid, data, offset + n * size, size,
1228                                   field->value[n]);
1229         }
1230 }
1231
1232 /*
1233  * Create a report. 'data' has to be allocated using
1234  * hid_alloc_report_buf() so that it has proper size.
1235  */
1236
1237 void hid_output_report(struct hid_report *report, __u8 *data)
1238 {
1239         unsigned n;
1240
1241         if (report->id > 0)
1242                 *data++ = report->id;
1243
1244         memset(data, 0, ((report->size - 1) >> 3) + 1);
1245         for (n = 0; n < report->maxfield; n++)
1246                 hid_output_field(report->device, report->field[n], data);
1247 }
1248 EXPORT_SYMBOL_GPL(hid_output_report);
1249
1250 /*
1251  * Allocator for buffer that is going to be passed to hid_output_report()
1252  */
1253 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags)
1254 {
1255         /*
1256          * 7 extra bytes are necessary to achieve proper functionality
1257          * of implement() working on 8 byte chunks
1258          */
1259
1260         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0) + 7;
1261
1262         return kmalloc(len, flags);
1263 }
1264 EXPORT_SYMBOL_GPL(hid_alloc_report_buf);
1265
1266 /*
1267  * Set a field value. The report this field belongs to has to be
1268  * created and transferred to the device, to set this value in the
1269  * device.
1270  */
1271
1272 int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
1273 {
1274         unsigned size;
1275
1276         if (!field)
1277                 return -1;
1278
1279         size = field->report_size;
1280
1281         hid_dump_input(field->report->device, field->usage + offset, value);
1282
1283         if (offset >= field->report_count) {
1284                 hid_err(field->report->device, "offset (%d) exceeds report_count (%d)\n",
1285                                 offset, field->report_count);
1286                 return -1;
1287         }
1288         if (field->logical_minimum < 0) {
1289                 if (value != snto32(s32ton(value, size), size)) {
1290                         hid_err(field->report->device, "value %d is out of range\n", value);
1291                         return -1;
1292                 }
1293         }
1294         field->value[offset] = value;
1295         return 0;
1296 }
1297 EXPORT_SYMBOL_GPL(hid_set_field);
1298
1299 static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1300                 const u8 *data)
1301 {
1302         struct hid_report *report;
1303         unsigned int n = 0;     /* Normally report number is 0 */
1304
1305         /* Device uses numbered reports, data[0] is report number */
1306         if (report_enum->numbered)
1307                 n = *data;
1308
1309         report = report_enum->report_id_hash[n];
1310         if (report == NULL)
1311                 dbg_hid("undefined report_id %u received\n", n);
1312
1313         return report;
1314 }
1315
1316 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1317                 int interrupt)
1318 {
1319         struct hid_report_enum *report_enum = hid->report_enum + type;
1320         struct hid_report *report;
1321         struct hid_driver *hdrv;
1322         unsigned int a;
1323         int rsize, csize = size;
1324         u8 *cdata = data;
1325         int ret = 0;
1326
1327         report = hid_get_report(report_enum, data);
1328         if (!report)
1329                 goto out;
1330
1331         if (report_enum->numbered) {
1332                 cdata++;
1333                 csize--;
1334         }
1335
1336         rsize = ((report->size - 1) >> 3) + 1;
1337
1338         if (rsize > HID_MAX_BUFFER_SIZE)
1339                 rsize = HID_MAX_BUFFER_SIZE;
1340
1341         if (csize < rsize) {
1342                 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1343                                 csize, rsize);
1344                 memset(cdata + csize, 0, rsize - csize);
1345         }
1346
1347         if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1348                 hid->hiddev_report_event(hid, report);
1349         if (hid->claimed & HID_CLAIMED_HIDRAW) {
1350                 ret = hidraw_report_event(hid, data, size);
1351                 if (ret)
1352                         goto out;
1353         }
1354
1355         if (hid->claimed != HID_CLAIMED_HIDRAW && report->maxfield) {
1356                 for (a = 0; a < report->maxfield; a++)
1357                         hid_input_field(hid, report->field[a], cdata, interrupt);
1358                 hdrv = hid->driver;
1359                 if (hdrv && hdrv->report)
1360                         hdrv->report(hid, report);
1361         }
1362
1363         if (hid->claimed & HID_CLAIMED_INPUT)
1364                 hidinput_report_event(hid, report);
1365 out:
1366         return ret;
1367 }
1368 EXPORT_SYMBOL_GPL(hid_report_raw_event);
1369
1370 /**
1371  * hid_input_report - report data from lower layer (usb, bt...)
1372  *
1373  * @hid: hid device
1374  * @type: HID report type (HID_*_REPORT)
1375  * @data: report contents
1376  * @size: size of data parameter
1377  * @interrupt: distinguish between interrupt and control transfers
1378  *
1379  * This is data entry for lower layers.
1380  */
1381 int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
1382 {
1383         struct hid_report_enum *report_enum;
1384         struct hid_driver *hdrv;
1385         struct hid_report *report;
1386         int ret = 0;
1387
1388         if (!hid)
1389                 return -ENODEV;
1390
1391         if (down_trylock(&hid->driver_input_lock))
1392                 return -EBUSY;
1393
1394         if (!hid->driver) {
1395                 ret = -ENODEV;
1396                 goto unlock;
1397         }
1398         report_enum = hid->report_enum + type;
1399         hdrv = hid->driver;
1400
1401         if (!size) {
1402                 dbg_hid("empty report\n");
1403                 ret = -1;
1404                 goto unlock;
1405         }
1406
1407         /* Avoid unnecessary overhead if debugfs is disabled */
1408         if (!list_empty(&hid->debug_list))
1409                 hid_dump_report(hid, type, data, size);
1410
1411         report = hid_get_report(report_enum, data);
1412
1413         if (!report) {
1414                 ret = -1;
1415                 goto unlock;
1416         }
1417
1418         if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1419                 ret = hdrv->raw_event(hid, report, data, size);
1420                 if (ret < 0) {
1421                         ret = ret < 0 ? ret : 0;
1422                         goto unlock;
1423                 }
1424         }
1425
1426         ret = hid_report_raw_event(hid, type, data, size, interrupt);
1427
1428 unlock:
1429         up(&hid->driver_input_lock);
1430         return ret;
1431 }
1432 EXPORT_SYMBOL_GPL(hid_input_report);
1433
1434 static bool hid_match_one_id(struct hid_device *hdev,
1435                 const struct hid_device_id *id)
1436 {
1437         return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
1438                 (id->group == HID_GROUP_ANY || id->group == hdev->group) &&
1439                 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1440                 (id->product == HID_ANY_ID || id->product == hdev->product);
1441 }
1442
1443 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
1444                 const struct hid_device_id *id)
1445 {
1446         for (; id->bus; id++)
1447                 if (hid_match_one_id(hdev, id))
1448                         return id;
1449
1450         return NULL;
1451 }
1452
1453 static const struct hid_device_id hid_hiddev_list[] = {
1454         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1455         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1456         { }
1457 };
1458
1459 static bool hid_hiddev(struct hid_device *hdev)
1460 {
1461         return !!hid_match_id(hdev, hid_hiddev_list);
1462 }
1463
1464
1465 static ssize_t
1466 read_report_descriptor(struct file *filp, struct kobject *kobj,
1467                 struct bin_attribute *attr,
1468                 char *buf, loff_t off, size_t count)
1469 {
1470         struct device *dev = container_of(kobj, struct device, kobj);
1471         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1472
1473         if (off >= hdev->rsize)
1474                 return 0;
1475
1476         if (off + count > hdev->rsize)
1477                 count = hdev->rsize - off;
1478
1479         memcpy(buf, hdev->rdesc + off, count);
1480
1481         return count;
1482 }
1483
1484 static struct bin_attribute dev_bin_attr_report_desc = {
1485         .attr = { .name = "report_descriptor", .mode = 0444 },
1486         .read = read_report_descriptor,
1487         .size = HID_MAX_DESCRIPTOR_SIZE,
1488 };
1489
1490 int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1491 {
1492         static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1493                 "Joystick", "Gamepad", "Keyboard", "Keypad",
1494                 "Multi-Axis Controller"
1495         };
1496         const char *type, *bus;
1497         char buf[64];
1498         unsigned int i;
1499         int len;
1500         int ret;
1501
1502         if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
1503                 connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
1504         if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
1505                 connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
1506         if (hdev->bus != BUS_USB)
1507                 connect_mask &= ~HID_CONNECT_HIDDEV;
1508         if (hid_hiddev(hdev))
1509                 connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1510
1511         if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1512                                 connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1513                 hdev->claimed |= HID_CLAIMED_INPUT;
1514
1515         if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1516                         !hdev->hiddev_connect(hdev,
1517                                 connect_mask & HID_CONNECT_HIDDEV_FORCE))
1518                 hdev->claimed |= HID_CLAIMED_HIDDEV;
1519         if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1520                 hdev->claimed |= HID_CLAIMED_HIDRAW;
1521
1522         /* Drivers with the ->raw_event callback set are not required to connect
1523          * to any other listener. */
1524         if (!hdev->claimed && !hdev->driver->raw_event) {
1525                 hid_err(hdev, "device has no listeners, quitting\n");
1526                 return -ENODEV;
1527         }
1528
1529         if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1530                         (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1531                 hdev->ff_init(hdev);
1532
1533         len = 0;
1534         if (hdev->claimed & HID_CLAIMED_INPUT)
1535                 len += sprintf(buf + len, "input");
1536         if (hdev->claimed & HID_CLAIMED_HIDDEV)
1537                 len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1538                                 hdev->minor);
1539         if (hdev->claimed & HID_CLAIMED_HIDRAW)
1540                 len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1541                                 ((struct hidraw *)hdev->hidraw)->minor);
1542
1543         type = "Device";
1544         for (i = 0; i < hdev->maxcollection; i++) {
1545                 struct hid_collection *col = &hdev->collection[i];
1546                 if (col->type == HID_COLLECTION_APPLICATION &&
1547                    (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1548                    (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1549                         type = types[col->usage & 0xffff];
1550                         break;
1551                 }
1552         }
1553
1554         switch (hdev->bus) {
1555         case BUS_USB:
1556                 bus = "USB";
1557                 break;
1558         case BUS_BLUETOOTH:
1559                 bus = "BLUETOOTH";
1560                 break;
1561         default:
1562                 bus = "<UNKNOWN>";
1563         }
1564
1565         ret = device_create_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1566         if (ret)
1567                 hid_warn(hdev,
1568                          "can't create sysfs report descriptor attribute err: %d\n", ret);
1569
1570         hid_info(hdev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1571                  buf, bus, hdev->version >> 8, hdev->version & 0xff,
1572                  type, hdev->name, hdev->phys);
1573
1574         return 0;
1575 }
1576 EXPORT_SYMBOL_GPL(hid_connect);
1577
1578 void hid_disconnect(struct hid_device *hdev)
1579 {
1580         device_remove_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1581         if (hdev->claimed & HID_CLAIMED_INPUT)
1582                 hidinput_disconnect(hdev);
1583         if (hdev->claimed & HID_CLAIMED_HIDDEV)
1584                 hdev->hiddev_disconnect(hdev);
1585         if (hdev->claimed & HID_CLAIMED_HIDRAW)
1586                 hidraw_disconnect(hdev);
1587 }
1588 EXPORT_SYMBOL_GPL(hid_disconnect);
1589
1590 /*
1591  * A list of devices for which there is a specialized driver on HID bus.
1592  *
1593  * Please note that for multitouch devices (driven by hid-multitouch driver),
1594  * there is a proper autodetection and autoloading in place (based on presence
1595  * of HID_DG_CONTACTID), so those devices don't need to be added to this list,
1596  * as we are doing the right thing in hid_scan_usage().
1597  *
1598  * Autodetection for (USB) HID sensor hubs exists too. If a collection of type
1599  * physical is found inside a usage page of type sensor, hid-sensor-hub will be
1600  * used as a driver. See hid_scan_report().
1601  */
1602 static const struct hid_device_id hid_have_special_driver[] = {
1603         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
1604         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
1605         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
1606         { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
1607         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
1608         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
1609         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
1610         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1611         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1612         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1613         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1614         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1615         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1616         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1617         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1618         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1619         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1620         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1621         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
1622         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
1623         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
1624         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
1625         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
1626         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
1627         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1628         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1629         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1630         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
1631         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
1632         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL3) },
1633         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
1634         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL5) },
1635         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
1636         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
1637         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
1638         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1639         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1640         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1641         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1642         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1643         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1644         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1645         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1646         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1647         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1648         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1649         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1650         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1651         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1652         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1653         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1654         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1655         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1656         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI) },
1657         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO) },
1658         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS) },
1659         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ANSI) },
1660         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ISO) },
1661         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_JIS) },
1662         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI) },
1663         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ISO) },
1664         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_JIS) },
1665         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI) },
1666         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO) },
1667         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS) },
1668         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI) },
1669         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ISO) },
1670         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_JIS) },
1671         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI) },
1672         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO) },
1673         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS) },
1674         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI) },
1675         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ISO) },
1676         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_JIS) },
1677         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI) },
1678         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO) },
1679         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_JIS) },
1680         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI) },
1681         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO) },
1682         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1683         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1684         { HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) },
1685         { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
1686         { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
1687         { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
1688         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
1689         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
1690         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
1691         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
1692         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
1693         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
1694         { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
1695         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
1696         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
1697         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
1698         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4) },
1699         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
1700         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
1701         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011) },
1702         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
1703         { HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0009) },
1704         { HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0030) },
1705         { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
1706         { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
1707         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
1708         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
1709         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
1710         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
1711         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
1712         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
1713         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
1714         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
1715         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD) },
1716         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
1717         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
1718         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
1719         { HID_USB_DEVICE(USB_VENDOR_ID_HUION, USB_DEVICE_ID_HUION_580) },
1720         { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD) },
1721         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
1722         { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
1723         { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
1724         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE) },
1725         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_GENIUS_GX_IMPERATOR) },
1726         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
1727         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_I405X) },
1728         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X) },
1729         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X) },
1730         { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
1731         { HID_USB_DEVICE(USB_VENDOR_ID_LCPOWER, USB_DEVICE_ID_LCPOWER_LC1000 ) },
1732 #if IS_ENABLED(CONFIG_HID_LENOVO_TPKBD)
1733         { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
1734 #endif
1735         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
1736         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
1737         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
1738         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
1739         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_HARMONY_PS3) },
1740         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
1741         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
1742         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
1743         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
1744         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
1745         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
1746         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
1747         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD_CORD) },
1748         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
1749         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
1750         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
1751         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_FFG ) },
1752         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
1753         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FLIGHT_SYSTEM_G940) },
1754         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
1755         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
1756         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_VIBRATION_WHEEL) },
1757         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DFP_WHEEL) },
1758         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DFGT_WHEEL) },
1759         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
1760         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G27_WHEEL) },
1761 #if IS_ENABLED(CONFIG_HID_LOGITECH_DJ)
1762         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER) },
1763         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2) },
1764 #endif
1765         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WII_WHEEL) },
1766         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
1767         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
1768         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
1769         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
1770         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
1771         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_COMFORT_MOUSE_4500) },
1772         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
1773         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
1774         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K_JP) },
1775         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
1776         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
1777         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_DIGITAL_MEDIA_3K) },
1778         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
1779         { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
1780         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
1781         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1) },
1782         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2) },
1783         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3) },
1784         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4) },
1785         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5) },
1786         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6) },
1787         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7) },
1788         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8) },
1789         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9) },
1790         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10) },
1791         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11) },
1792         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12) },
1793         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13) },
1794         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14) },
1795         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15) },
1796         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16) },
1797         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17) },
1798         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
1799         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
1800         { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
1801         { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
1802         { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
1803 #if IS_ENABLED(CONFIG_HID_ROCCAT)
1804         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
1805         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
1806         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
1807         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPLUS) },
1808         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE) },
1809         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE_OPTICAL) },
1810         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
1811         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) },
1812         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
1813         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
1814         { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) },
1815 #endif
1816         { HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_PS1000) },
1817         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
1818         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
1819         { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
1820         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_BUZZ_CONTROLLER) },
1821         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_WIRELESS_BUZZ_CONTROLLER) },
1822         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_BDREMOTE) },
1823         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1824         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_NAVIGATION_CONTROLLER) },
1825         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1826         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
1827         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGP_MOUSE) },
1828         { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
1829         { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
1830         { HID_USB_DEVICE(USB_VENDOR_ID_THINGM, USB_DEVICE_ID_BLINK1) },
1831         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
1832         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
1833         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323) },
1834         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324) },
1835         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
1836         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653) },
1837         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
1838         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a) },
1839         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_TIVO, USB_DEVICE_ID_TIVO_SLIDE_BT) },
1840         { HID_USB_DEVICE(USB_VENDOR_ID_TIVO, USB_DEVICE_ID_TIVO_SLIDE) },
1841         { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
1842         { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, USB_DEVICE_ID_TOPSEED2_RF_COMBO) },
1843         { HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
1844         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
1845         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
1846         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
1847         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
1848         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
1849         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
1850         { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
1851         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
1852         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SUPER_JOY_BOX_3) },
1853         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD) },
1854         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_3_PRO) },
1855         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_DUAL_BOX_PRO) },
1856         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_5_PRO) },
1857         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
1858         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
1859         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
1860         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
1861         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_Q_PAD) },
1862         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_PID_0038) },
1863         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
1864         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
1865         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET) },
1866         { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE) },
1867         { HID_USB_DEVICE(USB_VENDOR_ID_XIN_MO, USB_DEVICE_ID_XIN_MO_DUAL_ARCADE) },
1868         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
1869         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
1870         { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
1871
1872         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
1873         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1874         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1875         { }
1876 };
1877
1878 struct hid_dynid {
1879         struct list_head list;
1880         struct hid_device_id id;
1881 };
1882
1883 /**
1884  * store_new_id - add a new HID device ID to this driver and re-probe devices
1885  * @driver: target device driver
1886  * @buf: buffer for scanning device ID data
1887  * @count: input size
1888  *
1889  * Adds a new dynamic hid device ID to this driver,
1890  * and causes the driver to probe for all devices again.
1891  */
1892 static ssize_t store_new_id(struct device_driver *drv, const char *buf,
1893                 size_t count)
1894 {
1895         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1896         struct hid_dynid *dynid;
1897         __u32 bus, vendor, product;
1898         unsigned long driver_data = 0;
1899         int ret;
1900
1901         ret = sscanf(buf, "%x %x %x %lx",
1902                         &bus, &vendor, &product, &driver_data);
1903         if (ret < 3)
1904                 return -EINVAL;
1905
1906         dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1907         if (!dynid)
1908                 return -ENOMEM;
1909
1910         dynid->id.bus = bus;
1911         dynid->id.group = HID_GROUP_ANY;
1912         dynid->id.vendor = vendor;
1913         dynid->id.product = product;
1914         dynid->id.driver_data = driver_data;
1915
1916         spin_lock(&hdrv->dyn_lock);
1917         list_add_tail(&dynid->list, &hdrv->dyn_list);
1918         spin_unlock(&hdrv->dyn_lock);
1919
1920         ret = driver_attach(&hdrv->driver);
1921
1922         return ret ? : count;
1923 }
1924 static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
1925
1926 static void hid_free_dynids(struct hid_driver *hdrv)
1927 {
1928         struct hid_dynid *dynid, *n;
1929
1930         spin_lock(&hdrv->dyn_lock);
1931         list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1932                 list_del(&dynid->list);
1933                 kfree(dynid);
1934         }
1935         spin_unlock(&hdrv->dyn_lock);
1936 }
1937
1938 static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1939                 struct hid_driver *hdrv)
1940 {
1941         struct hid_dynid *dynid;
1942
1943         spin_lock(&hdrv->dyn_lock);
1944         list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1945                 if (hid_match_one_id(hdev, &dynid->id)) {
1946                         spin_unlock(&hdrv->dyn_lock);
1947                         return &dynid->id;
1948                 }
1949         }
1950         spin_unlock(&hdrv->dyn_lock);
1951
1952         return hid_match_id(hdev, hdrv->id_table);
1953 }
1954
1955 static int hid_bus_match(struct device *dev, struct device_driver *drv)
1956 {
1957         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1958         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1959
1960         return hid_match_device(hdev, hdrv) != NULL;
1961 }
1962
1963 static int hid_device_probe(struct device *dev)
1964 {
1965         struct hid_driver *hdrv = container_of(dev->driver,
1966                         struct hid_driver, driver);
1967         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1968         const struct hid_device_id *id;
1969         int ret = 0;
1970
1971         if (down_interruptible(&hdev->driver_lock))
1972                 return -EINTR;
1973         if (down_interruptible(&hdev->driver_input_lock)) {
1974                 ret = -EINTR;
1975                 goto unlock_driver_lock;
1976         }
1977         hdev->io_started = false;
1978
1979         if (!hdev->driver) {
1980                 id = hid_match_device(hdev, hdrv);
1981                 if (id == NULL) {
1982                         ret = -ENODEV;
1983                         goto unlock;
1984                 }
1985
1986                 hdev->driver = hdrv;
1987                 if (hdrv->probe) {
1988                         ret = hdrv->probe(hdev, id);
1989                 } else { /* default probe */
1990                         ret = hid_open_report(hdev);
1991                         if (!ret)
1992                                 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1993                 }
1994                 if (ret) {
1995                         hid_close_report(hdev);
1996                         hdev->driver = NULL;
1997                 }
1998         }
1999 unlock:
2000         if (!hdev->io_started)
2001                 up(&hdev->driver_input_lock);
2002 unlock_driver_lock:
2003         up(&hdev->driver_lock);
2004         return ret;
2005 }
2006
2007 static int hid_device_remove(struct device *dev)
2008 {
2009         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
2010         struct hid_driver *hdrv;
2011         int ret = 0;
2012
2013         if (down_interruptible(&hdev->driver_lock))
2014                 return -EINTR;
2015         if (down_interruptible(&hdev->driver_input_lock)) {
2016                 ret = -EINTR;
2017                 goto unlock_driver_lock;
2018         }
2019         hdev->io_started = false;
2020
2021         hdrv = hdev->driver;
2022         if (hdrv) {
2023                 if (hdrv->remove)
2024                         hdrv->remove(hdev);
2025                 else /* default remove */
2026                         hid_hw_stop(hdev);
2027                 hid_close_report(hdev);
2028                 hdev->driver = NULL;
2029         }
2030
2031         if (!hdev->io_started)
2032                 up(&hdev->driver_input_lock);
2033 unlock_driver_lock:
2034         up(&hdev->driver_lock);
2035         return ret;
2036 }
2037
2038 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
2039                              char *buf)
2040 {
2041         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
2042         int len;
2043
2044         len = snprintf(buf, PAGE_SIZE, "hid:b%04Xg%04Xv%08Xp%08X\n",
2045                        hdev->bus, hdev->group, hdev->vendor, hdev->product);
2046
2047         return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
2048 }
2049 static DEVICE_ATTR_RO(modalias);
2050
2051 static struct attribute *hid_dev_attrs[] = {
2052         &dev_attr_modalias.attr,
2053         NULL,
2054 };
2055 ATTRIBUTE_GROUPS(hid_dev);
2056
2057 static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
2058 {
2059         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
2060
2061         if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
2062                         hdev->bus, hdev->vendor, hdev->product))
2063                 return -ENOMEM;
2064
2065         if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
2066                 return -ENOMEM;
2067
2068         if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
2069                 return -ENOMEM;
2070
2071         if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
2072                 return -ENOMEM;
2073
2074         if (add_uevent_var(env, "MODALIAS=hid:b%04Xg%04Xv%08Xp%08X",
2075                            hdev->bus, hdev->group, hdev->vendor, hdev->product))
2076                 return -ENOMEM;
2077
2078         return 0;
2079 }
2080
2081 static struct bus_type hid_bus_type = {
2082         .name           = "hid",
2083         .dev_groups     = hid_dev_groups,
2084         .match          = hid_bus_match,
2085         .probe          = hid_device_probe,
2086         .remove         = hid_device_remove,
2087         .uevent         = hid_uevent,
2088 };
2089
2090 /* a list of devices that shouldn't be handled by HID core at all */
2091 static const struct hid_device_id hid_ignore_list[] = {
2092         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
2093         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
2094         { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
2095         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
2096         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
2097         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
2098         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
2099         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
2100         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
2101         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
2102         { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
2103         { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
2104         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
2105         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
2106         { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
2107         { HID_USB_DEVICE(USB_VENDOR_ID_AXENTIA, USB_DEVICE_ID_AXENTIA_FM_RADIO) },
2108         { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
2109         { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
2110         { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
2111         { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
2112         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
2113         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
2114         { HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
2115         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
2116         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
2117         { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
2118         { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x000a) },
2119         { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
2120         { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
2121         { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
2122         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) },
2123         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
2124         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
2125         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
2126         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
2127         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
2128         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
2129         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
2130         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
2131         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
2132         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
2133         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
2134         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
2135         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
2136         { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
2137         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
2138         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
2139         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_RADIOSHARK) },
2140         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
2141         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
2142         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
2143         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
2144         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
2145         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
2146         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
2147         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
2148         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
2149         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
2150         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
2151         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
2152         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
2153         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
2154         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
2155         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
2156         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
2157         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
2158         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
2159         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
2160         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
2161         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
2162         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
2163         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
2164         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
2165         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
2166         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
2167         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
2168         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
2169         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
2170         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
2171         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
2172         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
2173         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
2174         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
2175         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
2176         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
2177         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
2178         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
2179         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
2180         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
2181         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
2182         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
2183         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
2184         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
2185         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
2186         { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
2187         { HID_USB_DEVICE(USB_VENDOR_ID_JABRA, USB_DEVICE_ID_JABRA_SPEAK_410) },
2188         { HID_USB_DEVICE(USB_VENDOR_ID_JABRA, USB_DEVICE_ID_JABRA_SPEAK_510) },
2189         { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
2190         { HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
2191         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
2192         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_KYE, 0x0058) },
2193         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
2194         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY2) },
2195         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
2196         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY2) },
2197         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
2198         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY2) },
2199         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYVOLTAGE) },
2200         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYCURRENT) },
2201         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTIME) },
2202         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTEMPERATURE) },
2203         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYPH) },
2204         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
2205         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
2206         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
2207         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIC) },
2208         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIB) },
2209         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY) },
2210         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
2211         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
2212         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOTOR) },
2213         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
2214         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
2215         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
2216         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
2217         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
2218         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER) },
2219         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER2) },
2220         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_ABSESP) },
2221         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_AUTODATABUS) },
2222         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MCT) },
2223         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HYBRID) },
2224         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HEATCONTROL) },
2225         { HID_USB_DEVICE(USB_VENDOR_ID_MADCATZ, USB_DEVICE_ID_MADCATZ_BEATPAD) },
2226         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
2227         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
2228         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
2229         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
2230         { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
2231         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
2232         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
2233         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
2234         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
2235         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
2236         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
2237         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
2238         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
2239         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
2240         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
2241         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
2242         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
2243         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
2244         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
2245         { HID_USB_DEVICE(USB_VENDOR_ID_PHILIPS, USB_DEVICE_ID_PHILIPS_IEEE802154_DONGLE) },
2246         { HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
2247 #if defined(CONFIG_MOUSE_SYNAPTICS_USB) || defined(CONFIG_MOUSE_SYNAPTICS_USB_MODULE)
2248         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP) },
2249         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_INT_TP) },
2250         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_CPAD) },
2251         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_STICK) },
2252         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_WP) },
2253         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_COMP_TP) },
2254         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_WTP) },
2255         { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DPAD) },
2256 #endif
2257         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
2258         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
2259         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
2260         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
2261         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
2262         { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
2263         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
2264         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
2265         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
2266         { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
2267         { }
2268 };
2269
2270 /**
2271  * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
2272  *
2273  * There are composite devices for which we want to ignore only a certain
2274  * interface. This is a list of devices for which only the mouse interface will
2275  * be ignored. This allows a dedicated driver to take care of the interface.
2276  */
2277 static const struct hid_device_id hid_mouse_ignore_list[] = {
2278         /* appletouch driver */
2279         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
2280         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
2281         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
2282         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
2283         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
2284         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
2285         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
2286         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
2287         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
2288         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
2289         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
2290         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
2291         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
2292         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
2293         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
2294         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
2295         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
2296         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
2297         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
2298         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
2299         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
2300         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
2301         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
2302         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
2303         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
2304         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
2305         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
2306         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
2307         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
2308         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
2309         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
2310         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
2311         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI) },
2312         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO) },
2313         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS) },
2314         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI) },
2315         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ISO) },
2316         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_JIS) },
2317         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI) },
2318         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO) },
2319         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS) },
2320         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI) },
2321         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ISO) },
2322         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_JIS) },
2323         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI) },
2324         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO) },
2325         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS) },
2326         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI) },
2327         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ISO) },
2328         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_JIS) },
2329         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
2330         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
2331         { }
2332 };
2333
2334 bool hid_ignore(struct hid_device *hdev)
2335 {
2336         if (hdev->quirks & HID_QUIRK_NO_IGNORE)
2337                 return false;
2338         if (hdev->quirks & HID_QUIRK_IGNORE)
2339                 return true;
2340
2341         switch (hdev->vendor) {
2342         case USB_VENDOR_ID_CODEMERCS:
2343                 /* ignore all Code Mercenaries IOWarrior devices */
2344                 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
2345                                 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
2346                         return true;
2347                 break;
2348         case USB_VENDOR_ID_LOGITECH:
2349                 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
2350                                 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
2351                         return true;
2352                 /*
2353                  * The Keene FM transmitter USB device has the same USB ID as
2354                  * the Logitech AudioHub Speaker, but it should ignore the hid.
2355                  * Check if the name is that of the Keene device.
2356                  * For reference: the name of the AudioHub is
2357                  * "HOLTEK  AudioHub Speaker".
2358                  */
2359                 if (hdev->product == USB_DEVICE_ID_LOGITECH_AUDIOHUB &&
2360                         !strcmp(hdev->name, "HOLTEK  B-LINK USB Audio  "))
2361                                 return true;
2362                 break;
2363         case USB_VENDOR_ID_SOUNDGRAPH:
2364                 if (hdev->product >= USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST &&
2365                     hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
2366                         return true;
2367                 break;
2368         case USB_VENDOR_ID_HANWANG:
2369                 if (hdev->product >= USB_DEVICE_ID_HANWANG_TABLET_FIRST &&
2370                     hdev->product <= USB_DEVICE_ID_HANWANG_TABLET_LAST)
2371                         return true;
2372                 break;
2373         case USB_VENDOR_ID_JESS:
2374                 if (hdev->product == USB_DEVICE_ID_JESS_YUREX &&
2375                                 hdev->type == HID_TYPE_USBNONE)
2376                         return true;
2377                 break;
2378         case USB_VENDOR_ID_DWAV:
2379                 /* These are handled by usbtouchscreen. hdev->type is probably
2380                  * HID_TYPE_USBNONE, but we say !HID_TYPE_USBMOUSE to match
2381                  * usbtouchscreen. */
2382                 if ((hdev->product == USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER ||
2383                      hdev->product == USB_DEVICE_ID_DWAV_TOUCHCONTROLLER) &&
2384                     hdev->type != HID_TYPE_USBMOUSE)
2385                         return true;
2386                 break;
2387         case USB_VENDOR_ID_VELLEMAN:
2388                 /* These are not HID devices.  They are handled by comedi. */
2389                 if ((hdev->product >= USB_DEVICE_ID_VELLEMAN_K8055_FIRST &&
2390                      hdev->product <= USB_DEVICE_ID_VELLEMAN_K8055_LAST) ||
2391                     (hdev->product >= USB_DEVICE_ID_VELLEMAN_K8061_FIRST &&
2392                      hdev->product <= USB_DEVICE_ID_VELLEMAN_K8061_LAST))
2393                         return true;
2394                 break;
2395         case USB_VENDOR_ID_ATMEL_V_USB:
2396                 /* Masterkit MA901 usb radio based on Atmel tiny85 chip and
2397                  * it has the same USB ID as many Atmel V-USB devices. This
2398                  * usb radio is handled by radio-ma901.c driver so we want
2399                  * ignore the hid. Check the name, bus, product and ignore
2400                  * if we have MA901 usb radio.
2401                  */
2402                 if (hdev->product == USB_DEVICE_ID_ATMEL_V_USB &&
2403                         hdev->bus == BUS_USB &&
2404                         strncmp(hdev->name, "www.masterkit.ru MA901", 22) == 0)
2405                         return true;
2406                 break;
2407         }
2408
2409         if (hdev->type == HID_TYPE_USBMOUSE &&
2410                         hid_match_id(hdev, hid_mouse_ignore_list))
2411                 return true;
2412
2413         return !!hid_match_id(hdev, hid_ignore_list);
2414 }
2415 EXPORT_SYMBOL_GPL(hid_ignore);
2416
2417 int hid_add_device(struct hid_device *hdev)
2418 {
2419         static atomic_t id = ATOMIC_INIT(0);
2420         int ret;
2421
2422         if (WARN_ON(hdev->status & HID_STAT_ADDED))
2423                 return -EBUSY;
2424
2425         /* we need to kill them here, otherwise they will stay allocated to
2426          * wait for coming driver */
2427         if (hid_ignore(hdev))
2428                 return -ENODEV;
2429
2430         /*
2431          * Read the device report descriptor once and use as template
2432          * for the driver-specific modifications.
2433          */
2434         ret = hdev->ll_driver->parse(hdev);
2435         if (ret)
2436                 return ret;
2437         if (!hdev->dev_rdesc)
2438                 return -ENODEV;
2439
2440         /*
2441          * Scan generic devices for group information
2442          */
2443         if (hid_ignore_special_drivers ||
2444             !hid_match_id(hdev, hid_have_special_driver)) {
2445                 ret = hid_scan_report(hdev);
2446                 if (ret)
2447                         hid_warn(hdev, "bad device descriptor (%d)\n", ret);
2448         }
2449
2450         /* XXX hack, any other cleaner solution after the driver core
2451          * is converted to allow more than 20 bytes as the device name? */
2452         dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
2453                      hdev->vendor, hdev->product, atomic_inc_return(&id));
2454
2455         hid_debug_register(hdev, dev_name(&hdev->dev));
2456         ret = device_add(&hdev->dev);
2457         if (!ret)
2458                 hdev->status |= HID_STAT_ADDED;
2459         else
2460                 hid_debug_unregister(hdev);
2461
2462         return ret;
2463 }
2464 EXPORT_SYMBOL_GPL(hid_add_device);
2465
2466 /**
2467  * hid_allocate_device - allocate new hid device descriptor
2468  *
2469  * Allocate and initialize hid device, so that hid_destroy_device might be
2470  * used to free it.
2471  *
2472  * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
2473  * error value.
2474  */
2475 struct hid_device *hid_allocate_device(void)
2476 {
2477         struct hid_device *hdev;
2478         int ret = -ENOMEM;
2479
2480         hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2481         if (hdev == NULL)
2482                 return ERR_PTR(ret);
2483
2484         device_initialize(&hdev->dev);
2485         hdev->dev.release = hid_device_release;
2486         hdev->dev.bus = &hid_bus_type;
2487
2488         hid_close_report(hdev);
2489
2490         init_waitqueue_head(&hdev->debug_wait);
2491         INIT_LIST_HEAD(&hdev->debug_list);
2492         spin_lock_init(&hdev->debug_list_lock);
2493         sema_init(&hdev->driver_lock, 1);
2494         sema_init(&hdev->driver_input_lock, 1);
2495
2496         return hdev;
2497 }
2498 EXPORT_SYMBOL_GPL(hid_allocate_device);
2499
2500 static void hid_remove_device(struct hid_device *hdev)
2501 {
2502         if (hdev->status & HID_STAT_ADDED) {
2503                 device_del(&hdev->dev);
2504                 hid_debug_unregister(hdev);
2505                 hdev->status &= ~HID_STAT_ADDED;
2506         }
2507         kfree(hdev->dev_rdesc);
2508         hdev->dev_rdesc = NULL;
2509         hdev->dev_rsize = 0;
2510 }
2511
2512 /**
2513  * hid_destroy_device - free previously allocated device
2514  *
2515  * @hdev: hid device
2516  *
2517  * If you allocate hid_device through hid_allocate_device, you should ever
2518  * free by this function.
2519  */
2520 void hid_destroy_device(struct hid_device *hdev)
2521 {
2522         hid_remove_device(hdev);
2523         put_device(&hdev->dev);
2524 }
2525 EXPORT_SYMBOL_GPL(hid_destroy_device);
2526
2527 int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
2528                 const char *mod_name)
2529 {
2530         int ret;
2531
2532         hdrv->driver.name = hdrv->name;
2533         hdrv->driver.bus = &hid_bus_type;
2534         hdrv->driver.owner = owner;
2535         hdrv->driver.mod_name = mod_name;
2536
2537         INIT_LIST_HEAD(&hdrv->dyn_list);
2538         spin_lock_init(&hdrv->dyn_lock);
2539
2540         ret = driver_register(&hdrv->driver);
2541         if (ret)
2542                 return ret;
2543
2544         ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
2545         if (ret)
2546                 driver_unregister(&hdrv->driver);
2547
2548         return ret;
2549 }
2550 EXPORT_SYMBOL_GPL(__hid_register_driver);
2551
2552 void hid_unregister_driver(struct hid_driver *hdrv)
2553 {
2554         driver_remove_file(&hdrv->driver, &driver_attr_new_id);
2555         driver_unregister(&hdrv->driver);
2556         hid_free_dynids(hdrv);
2557 }
2558 EXPORT_SYMBOL_GPL(hid_unregister_driver);
2559
2560 int hid_check_keys_pressed(struct hid_device *hid)
2561 {
2562         struct hid_input *hidinput;
2563         int i;
2564
2565         if (!(hid->claimed & HID_CLAIMED_INPUT))
2566                 return 0;
2567
2568         list_for_each_entry(hidinput, &hid->inputs, list) {
2569                 for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
2570                         if (hidinput->input->key[i])
2571                                 return 1;
2572         }
2573
2574         return 0;
2575 }
2576
2577 EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
2578
2579 static int __init hid_init(void)
2580 {
2581         int ret;
2582
2583         if (hid_debug)
2584                 pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
2585                         "debugfs is now used for inspecting the device (report descriptor, reports)\n");
2586
2587         ret = bus_register(&hid_bus_type);
2588         if (ret) {
2589                 pr_err("can't register hid bus\n");
2590                 goto err;
2591         }
2592
2593         ret = hidraw_init();
2594         if (ret)
2595                 goto err_bus;
2596
2597         hid_debug_init();
2598
2599         return 0;
2600 err_bus:
2601         bus_unregister(&hid_bus_type);
2602 err:
2603         return ret;
2604 }
2605
2606 static void __exit hid_exit(void)
2607 {
2608         hid_debug_exit();
2609         hidraw_exit();
2610         bus_unregister(&hid_bus_type);
2611 }
2612
2613 module_init(hid_init);
2614 module_exit(hid_exit);
2615
2616 MODULE_AUTHOR("Andreas Gal");
2617 MODULE_AUTHOR("Vojtech Pavlik");
2618 MODULE_AUTHOR("Jiri Kosina");
2619 MODULE_LICENSE(DRIVER_LICENSE);
2620