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) 2006-2007 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 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/list.h>
  22 #include <linux/mm.h>
  23 #include <linux/spinlock.h>
  24 #include <asm/unaligned.h>
  25 #include <asm/byteorder.h>
  26 #include <linux/input.h>
  27 #include <linux/wait.h>
  28 #include <linux/vmalloc.h>
  29 #include <linux/sched.h>
  30
  31 #include <linux/hid.h>
  32 #include <linux/hiddev.h>
  33 #include <linux/hid-debug.h>
  34 #include <linux/hidraw.h>
  35
  36 #include "hid-ids.h"
  37
  38 /*
  39  * Version Information
  40  */
  41
  42 #define DRIVER_VERSION "v2.6"
  43 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
  44 #define DRIVER_DESC "HID core driver"
  45 #define DRIVER_LICENSE "GPL"
  46
  47 int hid_debug = 0;
  48 module_param_named(debug, hid_debug, int, 0600);
  49 MODULE_PARM_DESC(debug, "HID debugging (0=off, 1=probing info, 2=continuous data dumping)");
  50 EXPORT_SYMBOL_GPL(hid_debug);
  51
  52 /*
  53  * Register a new report for a device.
  54  */
  55
  56 static struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
  57 {
  58         struct hid_report_enum *report_enum = device->report_enum + type;
  59         struct hid_report *report;
  60
  61         if (report_enum->report_id_hash[id])
  62                 return report_enum->report_id_hash[id];
  63
  64         if (!(report = kzalloc(sizeof(struct hid_report), GFP_KERNEL)))
  65                 return NULL;
  66
  67         if (id != 0)
  68                 report_enum->numbered = 1;
  69
  70         report->id = id;
  71         report->type = type;
  72         report->size = 0;
  73         report->device = device;
  74         report_enum->report_id_hash[id] = report;
  75
  76         list_add_tail(&report->list, &report_enum->report_list);
  77
  78         return report;
  79 }
  80
  81 /*
  82  * Register a new field for this report.
  83  */
  84
  85 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
  86 {
  87         struct hid_field *field;
  88
  89         if (report->maxfield == HID_MAX_FIELDS) {
  90                 dbg_hid("too many fields in report\n");
  91                 return NULL;
  92         }
  93
  94         if (!(field = kzalloc(sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
  95                 + values * sizeof(unsigned), GFP_KERNEL))) return NULL;
  96
  97         field->index = report->maxfield++;
  98         report->field[field->index] = field;
  99         field->usage = (struct hid_usage *)(field + 1);
 100         field->value = (s32 *)(field->usage + usages);
 101         field->report = report;
 102
 103         return field;
 104 }
 105
 106 /*
 107  * Open a collection. The type/usage is pushed on the stack.
 108  */
 109
 110 static int open_collection(struct hid_parser *parser, unsigned type)
 111 {
 112         struct hid_collection *collection;
 113         unsigned usage;
 114
 115         usage = parser->local.usage[0];
 116
 117         if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
 118                 dbg_hid("collection stack overflow\n");
 119                 return -1;
 120         }
 121
 122         if (parser->device->maxcollection == parser->device->collection_size) {
 123                 collection = kmalloc(sizeof(struct hid_collection) *
 124                                 parser->device->collection_size * 2, GFP_KERNEL);
 125                 if (collection == NULL) {
 126                         dbg_hid("failed to reallocate collection array\n");
 127                         return -1;
 128                 }
 129                 memcpy(collection, parser->device->collection,
 130                         sizeof(struct hid_collection) *
 131                         parser->device->collection_size);
 132                 memset(collection + parser->device->collection_size, 0,
 133                         sizeof(struct hid_collection) *
 134                         parser->device->collection_size);
 135                 kfree(parser->device->collection);
 136                 parser->device->collection = collection;
 137                 parser->device->collection_size *= 2;
 138         }
 139
 140         parser->collection_stack[parser->collection_stack_ptr++] =
 141                 parser->device->maxcollection;
 142
 143         collection = parser->device->collection +
 144                 parser->device->maxcollection++;
 145         collection->type = type;
 146         collection->usage = usage;
 147         collection->level = parser->collection_stack_ptr - 1;
 148
 149         if (type == HID_COLLECTION_APPLICATION)
 150                 parser->device->maxapplication++;
 151
 152         return 0;
 153 }
 154
 155 /*
 156  * Close a collection.
 157  */
 158
 159 static int close_collection(struct hid_parser *parser)
 160 {
 161         if (!parser->collection_stack_ptr) {
 162                 dbg_hid("collection stack underflow\n");
 163                 return -1;
 164         }
 165         parser->collection_stack_ptr--;
 166         return 0;
 167 }
 168
 169 /*
 170  * Climb up the stack, search for the specified collection type
 171  * and return the usage.
 172  */
 173
 174 static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
 175 {
 176         int n;
 177         for (n = parser->collection_stack_ptr - 1; n >= 0; n--)
 178                 if (parser->device->collection[parser->collection_stack[n]].type == type)
 179                         return parser->device->collection[parser->collection_stack[n]].usage;
 180         return 0; /* we know nothing about this usage type */
 181 }
 182
 183 /*
 184  * Add a usage to the temporary parser table.
 185  */
 186
 187 static int hid_add_usage(struct hid_parser *parser, unsigned usage)
 188 {
 189         if (parser->local.usage_index >= HID_MAX_USAGES) {
 190                 dbg_hid("usage index exceeded\n");
 191                 return -1;
 192         }
 193         parser->local.usage[parser->local.usage_index] = usage;
 194         parser->local.collection_index[parser->local.usage_index] =
 195                 parser->collection_stack_ptr ?
 196                 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
 197         parser->local.usage_index++;
 198         return 0;
 199 }
 200
 201 /*
 202  * Register a new field for this report.
 203  */
 204
 205 static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
 206 {
 207         struct hid_report *report;
 208         struct hid_field *field;
 209         int usages;
 210         unsigned offset;
 211         int i;
 212
 213         if (!(report = hid_register_report(parser->device, report_type, parser->global.report_id))) {
 214                 dbg_hid("hid_register_report failed\n");
 215                 return -1;
 216         }
 217
 218         if (parser->global.logical_maximum < parser->global.logical_minimum) {
 219                 dbg_hid("logical range invalid %d %d\n", parser->global.logical_minimum, parser->global.logical_maximum);
 220                 return -1;
 221         }
 222
 223         offset = report->size;
 224         report->size += parser->global.report_size * parser->global.report_count;
 225
 226         if (!parser->local.usage_index) /* Ignore padding fields */
 227                 return 0;
 228
 229         usages = max_t(int, parser->local.usage_index, parser->global.report_count);
 230
 231         if ((field = hid_register_field(report, usages, parser->global.report_count)) == NULL)
 232                 return 0;
 233
 234         field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
 235         field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
 236         field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 237
 238         for (i = 0; i < usages; i++) {
 239                 int j = i;
 240                 /* Duplicate the last usage we parsed if we have excess values */
 241                 if (i >= parser->local.usage_index)
 242                         j = parser->local.usage_index - 1;
 243                 field->usage[i].hid = parser->local.usage[j];
 244                 field->usage[i].collection_index =
 245                         parser->local.collection_index[j];
 246         }
 247
 248         field->maxusage = usages;
 249         field->flags = flags;
 250         field->report_offset = offset;
 251         field->report_type = report_type;
 252         field->report_size = parser->global.report_size;
 253         field->report_count = parser->global.report_count;
 254         field->logical_minimum = parser->global.logical_minimum;
 255         field->logical_maximum = parser->global.logical_maximum;
 256         field->physical_minimum = parser->global.physical_minimum;
 257         field->physical_maximum = parser->global.physical_maximum;
 258         field->unit_exponent = parser->global.unit_exponent;
 259         field->unit = parser->global.unit;
 260
 261         return 0;
 262 }
 263
 264 /*
 265  * Read data value from item.
 266  */
 267
 268 static u32 item_udata(struct hid_item *item)
 269 {
 270         switch (item->size) {
 271         case 1: return item->data.u8;
 272         case 2: return item->data.u16;
 273         case 4: return item->data.u32;
 274         }
 275         return 0;
 276 }
 277
 278 static s32 item_sdata(struct hid_item *item)
 279 {
 280         switch (item->size) {
 281         case 1: return item->data.s8;
 282         case 2: return item->data.s16;
 283         case 4: return item->data.s32;
 284         }
 285         return 0;
 286 }
 287
 288 /*
 289  * Process a global item.
 290  */
 291
 292 static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
 293 {
 294         switch (item->tag) {
 295         case HID_GLOBAL_ITEM_TAG_PUSH:
 296
 297                 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
 298                         dbg_hid("global enviroment stack overflow\n");
 299                         return -1;
 300                 }
 301
 302                 memcpy(parser->global_stack + parser->global_stack_ptr++,
 303                         &parser->global, sizeof(struct hid_global));
 304                 return 0;
 305
 306         case HID_GLOBAL_ITEM_TAG_POP:
 307
 308                 if (!parser->global_stack_ptr) {
 309                         dbg_hid("global enviroment stack underflow\n");
 310                         return -1;
 311                 }
 312
 313                 memcpy(&parser->global, parser->global_stack +
 314                         --parser->global_stack_ptr, sizeof(struct hid_global));
 315                 return 0;
 316
 317         case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 318                 parser->global.usage_page = item_udata(item);
 319                 return 0;
 320
 321         case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 322                 parser->global.logical_minimum = item_sdata(item);
 323                 return 0;
 324
 325         case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 326                 if (parser->global.logical_minimum < 0)
 327                         parser->global.logical_maximum = item_sdata(item);
 328                 else
 329                         parser->global.logical_maximum = item_udata(item);
 330                 return 0;
 331
 332         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 333                 parser->global.physical_minimum = item_sdata(item);
 334                 return 0;
 335
 336         case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 337                 if (parser->global.physical_minimum < 0)
 338                         parser->global.physical_maximum = item_sdata(item);
 339                 else
 340                         parser->global.physical_maximum = item_udata(item);
 341                 return 0;
 342
 343         case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 344                 parser->global.unit_exponent = item_sdata(item);
 345                 return 0;
 346
 347         case HID_GLOBAL_ITEM_TAG_UNIT:
 348                 parser->global.unit = item_udata(item);
 349                 return 0;
 350
 351         case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 352                 parser->global.report_size = item_udata(item);
 353                 if (parser->global.report_size > 32) {
 354                         dbg_hid("invalid report_size %d\n",
 355                                         parser->global.report_size);
 356                         return -1;
 357                 }
 358                 return 0;
 359
 360         case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 361                 parser->global.report_count = item_udata(item);
 362                 if (parser->global.report_count > HID_MAX_USAGES) {
 363                         dbg_hid("invalid report_count %d\n",
 364                                         parser->global.report_count);
 365                         return -1;
 366                 }
 367                 return 0;
 368
 369         case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 370                 parser->global.report_id = item_udata(item);
 371                 if (parser->global.report_id == 0) {
 372                         dbg_hid("report_id 0 is invalid\n");
 373                         return -1;
 374                 }
 375                 return 0;
 376
 377         default:
 378                 dbg_hid("unknown global tag 0x%x\n", item->tag);
 379                 return -1;
 380         }
 381 }
 382
 383 /*
 384  * Process a local item.
 385  */
 386
 387 static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 388 {
 389         __u32 data;
 390         unsigned n;
 391
 392         if (item->size == 0) {
 393                 dbg_hid("item data expected for local item\n");
 394                 return -1;
 395         }
 396
 397         data = item_udata(item);
 398
 399         switch (item->tag) {
 400         case HID_LOCAL_ITEM_TAG_DELIMITER:
 401
 402                 if (data) {
 403                         /*
 404                          * We treat items before the first delimiter
 405                          * as global to all usage sets (branch 0).
 406                          * In the moment we process only these global
 407                          * items and the first delimiter set.
 408                          */
 409                         if (parser->local.delimiter_depth != 0) {
 410                                 dbg_hid("nested delimiters\n");
 411                                 return -1;
 412                         }
 413                         parser->local.delimiter_depth++;
 414                         parser->local.delimiter_branch++;
 415                 } else {
 416                         if (parser->local.delimiter_depth < 1) {
 417                                 dbg_hid("bogus close delimiter\n");
 418                                 return -1;
 419                         }
 420                         parser->local.delimiter_depth--;
 421                 }
 422                 return 1;
 423
 424         case HID_LOCAL_ITEM_TAG_USAGE:
 425
 426                 if (parser->local.delimiter_branch > 1) {
 427                         dbg_hid("alternative usage ignored\n");
 428                         return 0;
 429                 }
 430
 431                 if (item->size <= 2)
 432                         data = (parser->global.usage_page << 16) + data;
 433
 434                 return hid_add_usage(parser, data);
 435
 436         case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 437
 438                 if (parser->local.delimiter_branch > 1) {
 439                         dbg_hid("alternative usage ignored\n");
 440                         return 0;
 441                 }
 442
 443                 if (item->size <= 2)
 444                         data = (parser->global.usage_page << 16) + data;
 445
 446                 parser->local.usage_minimum = data;
 447                 return 0;
 448
 449         case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 450
 451                 if (parser->local.delimiter_branch > 1) {
 452                         dbg_hid("alternative usage ignored\n");
 453                         return 0;
 454                 }
 455
 456                 if (item->size <= 2)
 457                         data = (parser->global.usage_page << 16) + data;
 458
 459                 for (n = parser->local.usage_minimum; n <= data; n++)
 460                         if (hid_add_usage(parser, n)) {
 461                                 dbg_hid("hid_add_usage failed\n");
 462                                 return -1;
 463                         }
 464                 return 0;
 465
 466         default:
 467
 468                 dbg_hid("unknown local item tag 0x%x\n", item->tag);
 469                 return 0;
 470         }
 471         return 0;
 472 }
 473
 474 /*
 475  * Process a main item.
 476  */
 477
 478 static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
 479 {
 480         __u32 data;
 481         int ret;
 482
 483         data = item_udata(item);
 484
 485         switch (item->tag) {
 486         case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 487                 ret = open_collection(parser, data & 0xff);
 488                 break;
 489         case HID_MAIN_ITEM_TAG_END_COLLECTION:
 490                 ret = close_collection(parser);
 491                 break;
 492         case HID_MAIN_ITEM_TAG_INPUT:
 493                 ret = hid_add_field(parser, HID_INPUT_REPORT, data);
 494                 break;
 495         case HID_MAIN_ITEM_TAG_OUTPUT:
 496                 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
 497                 break;
 498         case HID_MAIN_ITEM_TAG_FEATURE:
 499                 ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
 500                 break;
 501         default:
 502                 dbg_hid("unknown main item tag 0x%x\n", item->tag);
 503                 ret = 0;
 504         }
 505
 506         memset(&parser->local, 0, sizeof(parser->local));       /* Reset the local parser environment */
 507
 508         return ret;
 509 }
 510
 511 /*
 512  * Process a reserved item.
 513  */
 514
 515 static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
 516 {
 517         dbg_hid("reserved item type, tag 0x%x\n", item->tag);
 518         return 0;
 519 }
 520
 521 /*
 522  * Free a report and all registered fields. The field->usage and
 523  * field->value table's are allocated behind the field, so we need
 524  * only to free(field) itself.
 525  */
 526
 527 static void hid_free_report(struct hid_report *report)
 528 {
 529         unsigned n;
 530
 531         for (n = 0; n < report->maxfield; n++)
 532                 kfree(report->field[n]);
 533         kfree(report);
 534 }
 535
 536 /*
 537  * Free a device structure, all reports, and all fields.
 538  */
 539
 540 static void hid_device_release(struct device *dev)
 541 {
 542         struct hid_device *device = container_of(dev, struct hid_device, dev);
 543         unsigned i, j;
 544
 545         for (i = 0; i < HID_REPORT_TYPES; i++) {
 546                 struct hid_report_enum *report_enum = device->report_enum + i;
 547
 548                 for (j = 0; j < 256; j++) {
 549                         struct hid_report *report = report_enum->report_id_hash[j];
 550                         if (report)
 551                                 hid_free_report(report);
 552                 }
 553         }
 554
 555         kfree(device->rdesc);
 556         kfree(device->collection);
 557         kfree(device);
 558 }
 559
 560 /*
 561  * Fetch a report description item from the data stream. We support long
 562  * items, though they are not used yet.
 563  */
 564
 565 static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
 566 {
 567         u8 b;
 568
 569         if ((end - start) <= 0)
 570                 return NULL;
 571
 572         b = *start++;
 573
 574         item->type = (b >> 2) & 3;
 575         item->tag  = (b >> 4) & 15;
 576
 577         if (item->tag == HID_ITEM_TAG_LONG) {
 578
 579                 item->format = HID_ITEM_FORMAT_LONG;
 580
 581                 if ((end - start) < 2)
 582                         return NULL;
 583
 584                 item->size = *start++;
 585                 item->tag  = *start++;
 586
 587                 if ((end - start) < item->size)
 588                         return NULL;
 589
 590                 item->data.longdata = start;
 591                 start += item->size;
 592                 return start;
 593         }
 594
 595         item->format = HID_ITEM_FORMAT_SHORT;
 596         item->size = b & 3;
 597
 598         switch (item->size) {
 599         case 0:
 600                 return start;
 601
 602         case 1:
 603                 if ((end - start) < 1)
 604                         return NULL;
 605                 item->data.u8 = *start++;
 606                 return start;
 607
 608         case 2:
 609                 if ((end - start) < 2)
 610                         return NULL;
 611                 item->data.u16 = get_unaligned_le16(start);
 612                 start = (__u8 *)((__le16 *)start + 1);
 613                 return start;
 614
 615         case 3:
 616                 item->size++;
 617                 if ((end - start) < 4)
 618                         return NULL;
 619                 item->data.u32 = get_unaligned_le32(start);
 620                 start = (__u8 *)((__le32 *)start + 1);
 621                 return start;
 622         }
 623
 624         return NULL;
 625 }
 626
 627 /**
 628  * hid_parse_report - parse device report
 629  *
 630  * @device: hid device
 631  * @start: report start
 632  * @size: report size
 633  *
 634  * Parse a report description into a hid_device structure. Reports are
 635  * enumerated, fields are attached to these reports.
 636  * 0 returned on success, otherwise nonzero error value.
 637  */
 638 int hid_parse_report(struct hid_device *device, __u8 *start,
 639                 unsigned size)
 640 {
 641         struct hid_parser *parser;
 642         struct hid_item item;
 643         __u8 *end;
 644         int ret;
 645         static int (*dispatch_type[])(struct hid_parser *parser,
 646                                       struct hid_item *item) = {
 647                 hid_parser_main,
 648                 hid_parser_global,
 649                 hid_parser_local,
 650                 hid_parser_reserved
 651         };
 652
 653         if (device->driver->report_fixup)
 654                 device->driver->report_fixup(device, start, size);
 655
 656         device->rdesc = kmalloc(size, GFP_KERNEL);
 657         if (device->rdesc == NULL)
 658                 return -ENOMEM;
 659         memcpy(device->rdesc, start, size);
 660         device->rsize = size;
 661
 662         parser = vmalloc(sizeof(struct hid_parser));
 663         if (!parser) {
 664                 ret = -ENOMEM;
 665                 goto err;
 666         }
 667
 668         memset(parser, 0, sizeof(struct hid_parser));
 669         parser->device = device;
 670
 671         end = start + size;
 672         ret = -EINVAL;
 673         while ((start = fetch_item(start, end, &item)) != NULL) {
 674
 675                 if (item.format != HID_ITEM_FORMAT_SHORT) {
 676                         dbg_hid("unexpected long global item\n");
 677                         goto err;
 678                 }
 679
 680                 if (dispatch_type[item.type](parser, &item)) {
 681                         dbg_hid("item %u %u %u %u parsing failed\n",
 682                                 item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag);
 683                         goto err;
 684                 }
 685
 686                 if (start == end) {
 687                         if (parser->collection_stack_ptr) {
 688                                 dbg_hid("unbalanced collection at end of report description\n");
 689                                 goto err;
 690                         }
 691                         if (parser->local.delimiter_depth) {
 692                                 dbg_hid("unbalanced delimiter at end of report description\n");
 693                                 goto err;
 694                         }
 695                         vfree(parser);
 696                         return 0;
 697                 }
 698         }
 699
 700         dbg_hid("item fetching failed at offset %d\n", (int)(end - start));
 701 err:
 702         vfree(parser);
 703         return ret;
 704 }
 705 EXPORT_SYMBOL_GPL(hid_parse_report);
 706
 707 /*
 708  * Convert a signed n-bit integer to signed 32-bit integer. Common
 709  * cases are done through the compiler, the screwed things has to be
 710  * done by hand.
 711  */
 712
 713 static s32 snto32(__u32 value, unsigned n)
 714 {
 715         switch (n) {
 716         case 8:  return ((__s8)value);
 717         case 16: return ((__s16)value);
 718         case 32: return ((__s32)value);
 719         }
 720         return value & (1 << (n - 1)) ? value | (-1 << n) : value;
 721 }
 722
 723 /*
 724  * Convert a signed 32-bit integer to a signed n-bit integer.
 725  */
 726
 727 static u32 s32ton(__s32 value, unsigned n)
 728 {
 729         s32 a = value >> (n - 1);
 730         if (a && a != -1)
 731                 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
 732         return value & ((1 << n) - 1);
 733 }
 734
 735 /*
 736  * Extract/implement a data field from/to a little endian report (bit array).
 737  *
 738  * Code sort-of follows HID spec:
 739  *     http://www.usb.org/developers/devclass_docs/HID1_11.pdf
 740  *
 741  * While the USB HID spec allows unlimited length bit fields in "report
 742  * descriptors", most devices never use more than 16 bits.
 743  * One model of UPS is claimed to report "LINEV" as a 32-bit field.
 744  * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
 745  */
 746
 747 static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n)
 748 {
 749         u64 x;
 750
 751         if (n > 32)
 752                 printk(KERN_WARNING "HID: extract() called with n (%d) > 32! (%s)\n",
 753                                 n, current->comm);
 754
 755         report += offset >> 3;  /* adjust byte index */
 756         offset &= 7;            /* now only need bit offset into one byte */
 757         x = get_unaligned_le64(report);
 758         x = (x >> offset) & ((1ULL << n) - 1);  /* extract bit field */
 759         return (u32) x;
 760 }
 761
 762 /*
 763  * "implement" : set bits in a little endian bit stream.
 764  * Same concepts as "extract" (see comments above).
 765  * The data mangled in the bit stream remains in little endian
 766  * order the whole time. It make more sense to talk about
 767  * endianness of register values by considering a register
 768  * a "cached" copy of the little endiad bit stream.
 769  */
 770 static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value)
 771 {
 772         u64 x;
 773         u64 m = (1ULL << n) - 1;
 774
 775         if (n > 32)
 776                 printk(KERN_WARNING "HID: implement() called with n (%d) > 32! (%s)\n",
 777                                 n, current->comm);
 778
 779         if (value > m)
 780                 printk(KERN_WARNING "HID: implement() called with too large value %d! (%s)\n",
 781                                 value, current->comm);
 782         WARN_ON(value > m);
 783         value &= m;
 784
 785         report += offset >> 3;
 786         offset &= 7;
 787
 788         x = get_unaligned_le64(report);
 789         x &= ~(m << offset);
 790         x |= ((u64)value) << offset;
 791         put_unaligned_le64(x, report);
 792 }
 793
 794 /*
 795  * Search an array for a value.
 796  */
 797
 798 static __inline__ int search(__s32 *array, __s32 value, unsigned n)
 799 {
 800         while (n--) {
 801                 if (*array++ == value)
 802                         return 0;
 803         }
 804         return -1;
 805 }
 806
 807 /**
 808  * hid_match_report - check if driver's raw_event should be called
 809  *
 810  * @hid: hid device
 811  * @report_type: type to match against
 812  *
 813  * compare hid->driver->report_table->report_type to report->type
 814  */
 815 static int hid_match_report(struct hid_device *hid, struct hid_report *report)
 816 {
 817         const struct hid_report_id *id = hid->driver->report_table;
 818
 819         if (!id) /* NULL means all */
 820                 return 1;
 821
 822         for (; id->report_type != HID_TERMINATOR; id++)
 823                 if (id->report_type == HID_ANY_ID ||
 824                                 id->report_type == report->type)
 825                         return 1;
 826         return 0;
 827 }
 828
 829 /**
 830  * hid_match_usage - check if driver's event should be called
 831  *
 832  * @hid: hid device
 833  * @usage: usage to match against
 834  *
 835  * compare hid->driver->usage_table->usage_{type,code} to
 836  * usage->usage_{type,code}
 837  */
 838 static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
 839 {
 840         const struct hid_usage_id *id = hid->driver->usage_table;
 841
 842         if (!id) /* NULL means all */
 843                 return 1;
 844
 845         for (; id->usage_type != HID_ANY_ID - 1; id++)
 846                 if ((id->usage_hid == HID_ANY_ID ||
 847                                 id->usage_hid == usage->hid) &&
 848                                 (id->usage_type == HID_ANY_ID ||
 849                                 id->usage_type == usage->type) &&
 850                                 (id->usage_code == HID_ANY_ID ||
 851                                  id->usage_code == usage->code))
 852                         return 1;
 853         return 0;
 854 }
 855
 856 static void hid_process_event(struct hid_device *hid, struct hid_field *field,
 857                 struct hid_usage *usage, __s32 value, int interrupt)
 858 {
 859         struct hid_driver *hdrv = hid->driver;
 860         int ret;
 861
 862         hid_dump_input(usage, value);
 863
 864         if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
 865                 ret = hdrv->event(hid, field, usage, value);
 866                 if (ret != 0) {
 867                         if (ret < 0)
 868                                 dbg_hid("%s's event failed with %d\n",
 869                                                 hdrv->name, ret);
 870                         return;
 871                 }
 872         }
 873
 874         if (hid->claimed & HID_CLAIMED_INPUT)
 875                 hidinput_hid_event(hid, field, usage, value);
 876         if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
 877                 hid->hiddev_hid_event(hid, field, usage, value);
 878 }
 879
 880 /*
 881  * Analyse a received field, and fetch the data from it. The field
 882  * content is stored for next report processing (we do differential
 883  * reporting to the layer).
 884  */
 885
 886 static void hid_input_field(struct hid_device *hid, struct hid_field *field,
 887                             __u8 *data, int interrupt)
 888 {
 889         unsigned n;
 890         unsigned count = field->report_count;
 891         unsigned offset = field->report_offset;
 892         unsigned size = field->report_size;
 893         __s32 min = field->logical_minimum;
 894         __s32 max = field->logical_maximum;
 895         __s32 *value;
 896
 897         if (!(value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC)))
 898                 return;
 899
 900         for (n = 0; n < count; n++) {
 901
 902                         value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) :
 903                                                     extract(data, offset + n * size, size);
 904
 905                         if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */
 906                             && value[n] >= min && value[n] <= max
 907                             && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
 908                                 goto exit;
 909         }
 910
 911         for (n = 0; n < count; n++) {
 912
 913                 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
 914                         hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
 915                         continue;
 916                 }
 917
 918                 if (field->value[n] >= min && field->value[n] <= max
 919                         && field->usage[field->value[n] - min].hid
 920                         && search(value, field->value[n], count))
 921                                 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
 922
 923                 if (value[n] >= min && value[n] <= max
 924                         && field->usage[value[n] - min].hid
 925                         && search(field->value, value[n], count))
 926                                 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
 927         }
 928
 929         memcpy(field->value, value, count * sizeof(__s32));
 930 exit:
 931         kfree(value);
 932 }
 933
 934 /*
 935  * Output the field into the report.
 936  */
 937
 938 static void hid_output_field(struct hid_field *field, __u8 *data)
 939 {
 940         unsigned count = field->report_count;
 941         unsigned offset = field->report_offset;
 942         unsigned size = field->report_size;
 943         unsigned bitsused = offset + count * size;
 944         unsigned n;
 945
 946         /* make sure the unused bits in the last byte are zeros */
 947         if (count > 0 && size > 0 && (bitsused % 8) != 0)
 948                 data[(bitsused-1)/8] &= (1 << (bitsused % 8)) - 1;
 949
 950         for (n = 0; n < count; n++) {
 951                 if (field->logical_minimum < 0) /* signed values */
 952                         implement(data, offset + n * size, size, s32ton(field->value[n], size));
 953                 else                            /* unsigned values */
 954                         implement(data, offset + n * size, size, field->value[n]);
 955         }
 956 }
 957
 958 /*
 959  * Create a report.
 960  */
 961
 962 void hid_output_report(struct hid_report *report, __u8 *data)
 963 {
 964         unsigned n;
 965
 966         if (report->id > 0)
 967                 *data++ = report->id;
 968
 969         for (n = 0; n < report->maxfield; n++)
 970                 hid_output_field(report->field[n], data);
 971 }
 972 EXPORT_SYMBOL_GPL(hid_output_report);
 973
 974 /*
 975  * Set a field value. The report this field belongs to has to be
 976  * created and transferred to the device, to set this value in the
 977  * device.
 978  */
 979
 980 int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
 981 {
 982         unsigned size = field->report_size;
 983
 984         hid_dump_input(field->usage + offset, value);
 985
 986         if (offset >= field->report_count) {
 987                 dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count);
 988                 return -1;
 989         }
 990         if (field->logical_minimum < 0) {
 991                 if (value != snto32(s32ton(value, size), size)) {
 992                         dbg_hid("value %d is out of range\n", value);
 993                         return -1;
 994                 }
 995         }
 996         field->value[offset] = value;
 997         return 0;
 998 }
 999 EXPORT_SYMBOL_GPL(hid_set_field);
1000
1001 static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1002                 const u8 *data)
1003 {
1004         struct hid_report *report;
1005         unsigned int n = 0;     /* Normally report number is 0 */
1006
1007         /* Device uses numbered reports, data[0] is report number */
1008         if (report_enum->numbered)
1009                 n = *data;
1010
1011         report = report_enum->report_id_hash[n];
1012         if (report == NULL)
1013                 dbg_hid("undefined report_id %u received\n", n);
1014
1015         return report;
1016 }
1017
1018 void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1019                 int interrupt)
1020 {
1021         struct hid_report_enum *report_enum = hid->report_enum + type;
1022         struct hid_report *report;
1023         unsigned int a;
1024         int rsize, csize = size;
1025         u8 *cdata = data;
1026
1027         report = hid_get_report(report_enum, data);
1028         if (!report)
1029                 return;
1030
1031         if (report_enum->numbered) {
1032                 cdata++;
1033                 csize--;
1034         }
1035
1036         rsize = ((report->size - 1) >> 3) + 1;
1037
1038         if (csize < rsize) {
1039                 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1040                                 csize, rsize);
1041                 memset(cdata + csize, 0, rsize - csize);
1042         }
1043
1044         if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1045                 hid->hiddev_report_event(hid, report);
1046         if (hid->claimed & HID_CLAIMED_HIDRAW) {
1047                 /* numbered reports need to be passed with the report num */
1048                 if (report_enum->numbered)
1049                         hidraw_report_event(hid, data - 1, size + 1);
1050                 else
1051                         hidraw_report_event(hid, data, size);
1052         }
1053
1054         for (a = 0; a < report->maxfield; a++)
1055                 hid_input_field(hid, report->field[a], cdata, interrupt);
1056
1057         if (hid->claimed & HID_CLAIMED_INPUT)
1058                 hidinput_report_event(hid, report);
1059 }
1060 EXPORT_SYMBOL_GPL(hid_report_raw_event);
1061
1062 /**
1063  * hid_input_report - report data from lower layer (usb, bt...)
1064  *
1065  * @hid: hid device
1066  * @type: HID report type (HID_*_REPORT)
1067  * @data: report contents
1068  * @size: size of data parameter
1069  * @interrupt: called from atomic?
1070  *
1071  * This is data entry for lower layers.
1072  */
1073 int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
1074 {
1075         struct hid_report_enum *report_enum = hid->report_enum + type;
1076         struct hid_driver *hdrv = hid->driver;
1077         struct hid_report *report;
1078         unsigned int i;
1079         int ret;
1080
1081         if (!hid || !hid->driver)
1082                 return -ENODEV;
1083
1084         if (!size) {
1085                 dbg_hid("empty report\n");
1086                 return -1;
1087         }
1088
1089         dbg_hid("report (size %u) (%snumbered)\n", size, report_enum->numbered ? "" : "un");
1090
1091         report = hid_get_report(report_enum, data);
1092         if (!report)
1093                 return -1;
1094
1095         /* dump the report */
1096         dbg_hid("report %d (size %u) = ", report->id, size);
1097         for (i = 0; i < size; i++)
1098                 dbg_hid_line(" %02x", data[i]);
1099         dbg_hid_line("\n");
1100
1101         if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1102                 ret = hdrv->raw_event(hid, report, data, size);
1103                 if (ret != 0)
1104                         return ret < 0 ? ret : 0;
1105         }
1106
1107         hid_report_raw_event(hid, type, data, size, interrupt);
1108
1109         return 0;
1110 }
1111 EXPORT_SYMBOL_GPL(hid_input_report);
1112
1113 static bool hid_match_one_id(struct hid_device *hdev,
1114                 const struct hid_device_id *id)
1115 {
1116         return id->bus == hdev->bus &&
1117                 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1118                 (id->product == HID_ANY_ID || id->product == hdev->product);
1119 }
1120
1121 static const struct hid_device_id *hid_match_id(struct hid_device *hdev,
1122                 const struct hid_device_id *id)
1123 {
1124         for (; id->bus; id++)
1125                 if (hid_match_one_id(hdev, id))
1126                         return id;
1127
1128         return NULL;
1129 }
1130
1131 static const struct hid_device_id hid_hiddev_list[] = {
1132         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1133         { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1134         { }
1135 };
1136
1137 static bool hid_hiddev(struct hid_device *hdev)
1138 {
1139         return !!hid_match_id(hdev, hid_hiddev_list);
1140 }
1141
1142 int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1143 {
1144         static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1145                 "Joystick", "Gamepad", "Keyboard", "Keypad",
1146                 "Multi-Axis Controller"
1147         };
1148         const char *type, *bus;
1149         char buf[64];
1150         unsigned int i;
1151         int len;
1152
1153         if (hdev->bus != BUS_USB)
1154                 connect_mask &= ~HID_CONNECT_HIDDEV;
1155         if (hid_hiddev(hdev))
1156                 connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1157
1158         if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1159                                 connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1160                 hdev->claimed |= HID_CLAIMED_INPUT;
1161         if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1162                         !hdev->hiddev_connect(hdev,
1163                                 connect_mask & HID_CONNECT_HIDDEV_FORCE))
1164                 hdev->claimed |= HID_CLAIMED_HIDDEV;
1165         if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1166                 hdev->claimed |= HID_CLAIMED_HIDRAW;
1167
1168         if (!hdev->claimed) {
1169                 dev_err(&hdev->dev, "claimed by neither input, hiddev nor "
1170                                 "hidraw\n");
1171                 return -ENODEV;
1172         }
1173
1174         if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1175                         (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1176                 hdev->ff_init(hdev);
1177
1178         len = 0;
1179         if (hdev->claimed & HID_CLAIMED_INPUT)
1180                 len += sprintf(buf + len, "input");
1181         if (hdev->claimed & HID_CLAIMED_HIDDEV)
1182                 len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1183                                 hdev->minor);
1184         if (hdev->claimed & HID_CLAIMED_HIDRAW)
1185                 len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1186                                 ((struct hidraw *)hdev->hidraw)->minor);
1187
1188         type = "Device";
1189         for (i = 0; i < hdev->maxcollection; i++) {
1190                 struct hid_collection *col = &hdev->collection[i];
1191                 if (col->type == HID_COLLECTION_APPLICATION &&
1192                    (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1193                    (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1194                         type = types[col->usage & 0xffff];
1195                         break;
1196                 }
1197         }
1198
1199         switch (hdev->bus) {
1200         case BUS_USB:
1201                 bus = "USB";
1202                 break;
1203         case BUS_BLUETOOTH:
1204                 bus = "BLUETOOTH";
1205                 break;
1206         default:
1207                 bus = "<UNKNOWN>";
1208         }
1209
1210         dev_info(&hdev->dev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1211                         buf, bus, hdev->version >> 8, hdev->version & 0xff,
1212                         type, hdev->name, hdev->phys);
1213
1214         return 0;
1215 }
1216 EXPORT_SYMBOL_GPL(hid_connect);
1217
1218 /* a list of devices for which there is a specialized driver on HID bus */
1219 static const struct hid_device_id hid_blacklist[] = {
1220         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
1221         { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
1222         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
1223         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
1224         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
1225         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1226         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1227         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1228         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1229         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1230         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1231         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1232         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1233         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1234         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1235         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1236         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
1237         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
1238         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
1239         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
1240         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
1241         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
1242         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1243         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1244         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1245         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
1246         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
1247         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
1248         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1249         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1250         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1251         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1252         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1253         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1254         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1255         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1256         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1257         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1258         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1259         { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
1260         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
1261         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
1262         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
1263         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
1264         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
1265         { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
1266         { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
1267         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
1268         { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
1269         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
1270         { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
1271         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
1272         { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
1273         { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
1274         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
1275         { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
1276         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
1277         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
1278         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
1279         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
1280         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
1281         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
1282         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
1283         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
1284         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
1285         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
1286         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
1287         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
1288         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
1289         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
1290         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
1291         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
1292         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
1293         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
1294         { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
1295         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
1296         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
1297         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
1298         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
1299         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
1300         { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
1301         { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
1302         { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
1303         { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
1304         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1305         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
1306         { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
1307         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
1308         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
1309         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
1310         { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
1311         { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
1312         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
1313         { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
1314
1315         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 0x030c) },
1316         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
1317         { }
1318 };
1319
1320 struct hid_dynid {
1321         struct list_head list;
1322         struct hid_device_id id;
1323 };
1324
1325 /**
1326  * store_new_id - add a new HID device ID to this driver and re-probe devices
1327  * @driver: target device driver
1328  * @buf: buffer for scanning device ID data
1329  * @count: input size
1330  *
1331  * Adds a new dynamic hid device ID to this driver,
1332  * and causes the driver to probe for all devices again.
1333  */
1334 static ssize_t store_new_id(struct device_driver *drv, const char *buf,
1335                 size_t count)
1336 {
1337         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1338         struct hid_dynid *dynid;
1339         __u32 bus, vendor, product;
1340         unsigned long driver_data = 0;
1341         int ret;
1342
1343         ret = sscanf(buf, "%x %x %x %lx",
1344                         &bus, &vendor, &product, &driver_data);
1345         if (ret < 3)
1346                 return -EINVAL;
1347
1348         dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1349         if (!dynid)
1350                 return -ENOMEM;
1351
1352         dynid->id.bus = bus;
1353         dynid->id.vendor = vendor;
1354         dynid->id.product = product;
1355         dynid->id.driver_data = driver_data;
1356
1357         spin_lock(&hdrv->dyn_lock);
1358         list_add_tail(&dynid->list, &hdrv->dyn_list);
1359         spin_unlock(&hdrv->dyn_lock);
1360
1361         ret = 0;
1362         if (get_driver(&hdrv->driver)) {
1363                 ret = driver_attach(&hdrv->driver);
1364                 put_driver(&hdrv->driver);
1365         }
1366
1367         return ret ? : count;
1368 }
1369 static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
1370
1371 static void hid_free_dynids(struct hid_driver *hdrv)
1372 {
1373         struct hid_dynid *dynid, *n;
1374
1375         spin_lock(&hdrv->dyn_lock);
1376         list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1377                 list_del(&dynid->list);
1378                 kfree(dynid);
1379         }
1380         spin_unlock(&hdrv->dyn_lock);
1381 }
1382
1383 static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1384                 struct hid_driver *hdrv)
1385 {
1386         struct hid_dynid *dynid;
1387
1388         spin_lock(&hdrv->dyn_lock);
1389         list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1390                 if (hid_match_one_id(hdev, &dynid->id)) {
1391                         spin_unlock(&hdrv->dyn_lock);
1392                         return &dynid->id;
1393                 }
1394         }
1395         spin_unlock(&hdrv->dyn_lock);
1396
1397         return hid_match_id(hdev, hdrv->id_table);
1398 }
1399
1400 static int hid_bus_match(struct device *dev, struct device_driver *drv)
1401 {
1402         struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1403         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1404
1405         if (!hid_match_device(hdev, hdrv))
1406                 return 0;
1407
1408         /* generic wants all non-blacklisted */
1409         if (!strncmp(hdrv->name, "generic-", 8))
1410                 return !hid_match_id(hdev, hid_blacklist);
1411
1412         return 1;
1413 }
1414
1415 static int hid_device_probe(struct device *dev)
1416 {
1417         struct hid_driver *hdrv = container_of(dev->driver,
1418                         struct hid_driver, driver);
1419         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1420         const struct hid_device_id *id;
1421         int ret = 0;
1422
1423         if (!hdev->driver) {
1424                 id = hid_match_device(hdev, hdrv);
1425                 if (id == NULL)
1426                         return -ENODEV;
1427
1428                 hdev->driver = hdrv;
1429                 if (hdrv->probe) {
1430                         ret = hdrv->probe(hdev, id);
1431                 } else { /* default probe */
1432                         ret = hid_parse(hdev);
1433                         if (!ret)
1434                                 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1435                 }
1436                 if (ret)
1437                         hdev->driver = NULL;
1438         }
1439         return ret;
1440 }
1441
1442 static int hid_device_remove(struct device *dev)
1443 {
1444         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1445         struct hid_driver *hdrv = hdev->driver;
1446
1447         if (hdrv) {
1448                 if (hdrv->remove)
1449                         hdrv->remove(hdev);
1450                 else /* default remove */
1451                         hid_hw_stop(hdev);
1452                 hdev->driver = NULL;
1453         }
1454
1455         return 0;
1456 }
1457
1458 static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
1459 {
1460         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1461
1462         if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
1463                         hdev->bus, hdev->vendor, hdev->product))
1464                 return -ENOMEM;
1465
1466         if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
1467                 return -ENOMEM;
1468
1469         if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
1470                 return -ENOMEM;
1471
1472         if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
1473                 return -ENOMEM;
1474
1475         if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X",
1476                         hdev->bus, hdev->vendor, hdev->product))
1477                 return -ENOMEM;
1478
1479         return 0;
1480 }
1481
1482 static struct bus_type hid_bus_type = {
1483         .name           = "hid",
1484         .match          = hid_bus_match,
1485         .probe          = hid_device_probe,
1486         .remove         = hid_device_remove,
1487         .uevent         = hid_uevent,
1488 };
1489
1490 /* a list of devices that shouldn't be handled by HID core at all */
1491 static const struct hid_device_id hid_ignore_list[] = {
1492         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
1493         { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
1494         { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
1495         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
1496         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
1497         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
1498         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
1499         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
1500         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
1501         { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
1502         { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
1503         { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
1504         { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)},
1505         { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2)},
1506         { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
1507         { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
1508         { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
1509         { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
1510         { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
1511         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
1512         { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
1513         { HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
1514         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
1515         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
1516         { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
1517         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) },
1518         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
1519         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) },
1520         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
1521         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
1522         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
1523         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
1524         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
1525         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
1526         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
1527         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
1528         { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
1529         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
1530         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
1531         { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
1532         { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
1533         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
1534         { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
1535         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
1536         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
1537         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
1538         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
1539         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
1540         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
1541         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
1542         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
1543         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
1544         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
1545         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
1546         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
1547         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
1548         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
1549         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
1550         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
1551         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
1552         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
1553         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
1554         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
1555         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
1556         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
1557         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
1558         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
1559         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
1560         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
1561         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
1562         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
1563         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
1564         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
1565         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
1566         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
1567         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
1568         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
1569         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
1570         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
1571         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
1572         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
1573         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
1574         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
1575         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
1576         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
1577         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
1578         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
1579         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
1580         { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
1581         { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
1582         { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
1583         { HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
1584         { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
1585         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
1586         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
1587         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
1588         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
1589         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
1590         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
1591         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY1) },
1592         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
1593         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
1594         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
1595         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
1596         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
1597         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
1598         { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
1599         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
1600         { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
1601         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
1602         { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
1603         { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
1604         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
1605         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
1606         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
1607         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
1608         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
1609         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
1610         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
1611         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
1612         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
1613         { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
1614         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
1615         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
1616         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
1617         { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
1618         { HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
1619         { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD) },
1620         { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD2) },
1621         { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD3) },
1622         { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD4) },
1623         { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD5) },
1624         { HID_USB_DEVICE(USB_VENDOR_ID_TENX, USB_DEVICE_ID_TENX_IBUDDY1) },
1625         { HID_USB_DEVICE(USB_VENDOR_ID_TENX, USB_DEVICE_ID_TENX_IBUDDY2) },
1626         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
1627         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
1628         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
1629         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
1630         { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
1631         { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
1632         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
1633         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
1634         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
1635         { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
1636         { }
1637 };
1638
1639 /**
1640  * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
1641  *
1642  * There are composite devices for which we want to ignore only a certain
1643  * interface. This is a list of devices for which only the mouse interface will
1644  * be ignored. This allows a dedicated driver to take care of the interface.
1645  */
1646 static const struct hid_device_id hid_mouse_ignore_list[] = {
1647         /* appletouch driver */
1648         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1649         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1650         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1651         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1652         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1653         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1654         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1655         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1656         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1657         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1658         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1659         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1660         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1661         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1662         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1663         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1664         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1665         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1666         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1667         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1668         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1669         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1670         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1671         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1672         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1673         { }
1674 };
1675
1676 static bool hid_ignore(struct hid_device *hdev)
1677 {
1678         switch (hdev->vendor) {
1679         case USB_VENDOR_ID_CODEMERCS:
1680                 /* ignore all Code Mercenaries IOWarrior devices */
1681                 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
1682                                 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
1683                         return true;
1684                 break;
1685         case USB_VENDOR_ID_LOGITECH:
1686                 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
1687                                 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
1688                         return true;
1689                 break;
1690         }
1691
1692         if (hdev->type == HID_TYPE_USBMOUSE &&
1693                         hid_match_id(hdev, hid_mouse_ignore_list))
1694                 return true;
1695
1696         return !!hid_match_id(hdev, hid_ignore_list);
1697 }
1698
1699 int hid_add_device(struct hid_device *hdev)
1700 {
1701         static atomic_t id = ATOMIC_INIT(0);
1702         int ret;
1703
1704         if (WARN_ON(hdev->status & HID_STAT_ADDED))
1705                 return -EBUSY;
1706
1707         /* we need to kill them here, otherwise they will stay allocated to
1708          * wait for coming driver */
1709         if (hid_ignore(hdev))
1710                 return -ENODEV;
1711
1712         /* XXX hack, any other cleaner solution after the driver core
1713          * is converted to allow more than 20 bytes as the device name? */
1714         dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
1715                      hdev->vendor, hdev->product, atomic_inc_return(&id));
1716
1717         ret = device_add(&hdev->dev);
1718         if (!ret)
1719                 hdev->status |= HID_STAT_ADDED;
1720
1721         hid_debug_register(hdev, dev_name(&hdev->dev));
1722
1723         return ret;
1724 }
1725 EXPORT_SYMBOL_GPL(hid_add_device);
1726
1727 /**
1728  * hid_allocate_device - allocate new hid device descriptor
1729  *
1730  * Allocate and initialize hid device, so that hid_destroy_device might be
1731  * used to free it.
1732  *
1733  * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
1734  * error value.
1735  */
1736 struct hid_device *hid_allocate_device(void)
1737 {
1738         struct hid_device *hdev;
1739         unsigned int i;
1740         int ret = -ENOMEM;
1741
1742         hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
1743         if (hdev == NULL)
1744                 return ERR_PTR(ret);
1745
1746         device_initialize(&hdev->dev);
1747         hdev->dev.release = hid_device_release;
1748         hdev->dev.bus = &hid_bus_type;
1749
1750         hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
1751                         sizeof(struct hid_collection), GFP_KERNEL);
1752         if (hdev->collection == NULL)
1753                 goto err;
1754         hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
1755
1756         for (i = 0; i < HID_REPORT_TYPES; i++)
1757                 INIT_LIST_HEAD(&hdev->report_enum[i].report_list);
1758
1759         return hdev;
1760 err:
1761         put_device(&hdev->dev);
1762         return ERR_PTR(ret);
1763 }
1764 EXPORT_SYMBOL_GPL(hid_allocate_device);
1765
1766 static void hid_remove_device(struct hid_device *hdev)
1767 {
1768         if (hdev->status & HID_STAT_ADDED) {
1769                 device_del(&hdev->dev);
1770                 hid_debug_unregister(hdev);
1771                 hdev->status &= ~HID_STAT_ADDED;
1772         }
1773 }
1774
1775 /**
1776  * hid_destroy_device - free previously allocated device
1777  *
1778  * @hdev: hid device
1779  *
1780  * If you allocate hid_device through hid_allocate_device, you should ever
1781  * free by this function.
1782  */
1783 void hid_destroy_device(struct hid_device *hdev)
1784 {
1785         hid_remove_device(hdev);
1786         put_device(&hdev->dev);
1787 }
1788 EXPORT_SYMBOL_GPL(hid_destroy_device);
1789
1790 int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
1791                 const char *mod_name)
1792 {
1793         int ret;
1794
1795         hdrv->driver.name = hdrv->name;
1796         hdrv->driver.bus = &hid_bus_type;
1797         hdrv->driver.owner = owner;
1798         hdrv->driver.mod_name = mod_name;
1799
1800         INIT_LIST_HEAD(&hdrv->dyn_list);
1801         spin_lock_init(&hdrv->dyn_lock);
1802
1803         ret = driver_register(&hdrv->driver);
1804         if (ret)
1805                 return ret;
1806
1807         ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
1808         if (ret)
1809                 driver_unregister(&hdrv->driver);
1810
1811         return ret;
1812 }
1813 EXPORT_SYMBOL_GPL(__hid_register_driver);
1814
1815 void hid_unregister_driver(struct hid_driver *hdrv)
1816 {
1817         driver_remove_file(&hdrv->driver, &driver_attr_new_id);
1818         driver_unregister(&hdrv->driver);
1819         hid_free_dynids(hdrv);
1820 }
1821 EXPORT_SYMBOL_GPL(hid_unregister_driver);
1822
1823 int hid_check_keys_pressed(struct hid_device *hid)
1824 {
1825         struct hid_input *hidinput;
1826         int i;
1827
1828         if (!(hid->claimed & HID_CLAIMED_INPUT))
1829                 return 0;
1830
1831         list_for_each_entry(hidinput, &hid->inputs, list) {
1832                 for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
1833                         if (hidinput->input->key[i])
1834                                 return 1;
1835         }
1836
1837         return 0;
1838 }
1839
1840 EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
1841
1842 static int __init hid_init(void)
1843 {
1844         int ret;
1845
1846         if (hid_debug)
1847                 printk(KERN_WARNING "HID: hid_debug parameter has been deprecated. "
1848                                 "Debugging data are now provided via debugfs\n");
1849
1850         ret = bus_register(&hid_bus_type);
1851         if (ret) {
1852                 printk(KERN_ERR "HID: can't register hid bus\n");
1853                 goto err;
1854         }
1855
1856         ret = hidraw_init();
1857         if (ret)
1858                 goto err_bus;
1859
1860         hid_debug_init();
1861
1862         return 0;
1863 err_bus:
1864         bus_unregister(&hid_bus_type);
1865 err:
1866         return ret;
1867 }
1868
1869 static void __exit hid_exit(void)
1870 {
1871         hid_debug_exit();
1872         hidraw_exit();
1873         bus_unregister(&hid_bus_type);
1874 }
1875
1876 module_init(hid_init);
1877 module_exit(hid_exit);
1878
1879 MODULE_LICENSE(DRIVER_LICENSE);
1880