linux/drivers/hid/hid-core.c
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   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) 2006-2010 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
  33#include <linux/hid.h>
  34#include <linux/hiddev.h>
  35#include <linux/hid-debug.h>
  36#include <linux/hidraw.h>
  37
  38#include "hid-ids.h"
  39
  40/*
  41 * Version Information
  42 */
  43
  44#define DRIVER_DESC "HID core driver"
  45#define DRIVER_LICENSE "GPL"
  46
  47int hid_debug = 0;
  48module_param_named(debug, hid_debug, int, 0600);
  49MODULE_PARM_DESC(debug, "toggle HID debugging messages");
  50EXPORT_SYMBOL_GPL(hid_debug);
  51
  52/*
  53 * Register a new report for a device.
  54 */
  55
  56struct 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        report = kzalloc(sizeof(struct hid_report), GFP_KERNEL);
  65        if (!report)
  66                return NULL;
  67
  68        if (id != 0)
  69                report_enum->numbered = 1;
  70
  71        report->id = id;
  72        report->type = type;
  73        report->size = 0;
  74        report->device = device;
  75        report_enum->report_id_hash[id] = report;
  76
  77        list_add_tail(&report->list, &report_enum->report_list);
  78
  79        return report;
  80}
  81EXPORT_SYMBOL_GPL(hid_register_report);
  82
  83/*
  84 * Register a new field for this report.
  85 */
  86
  87static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
  88{
  89        struct hid_field *field;
  90
  91        if (report->maxfield == HID_MAX_FIELDS) {
  92                dbg_hid("too many fields in report\n");
  93                return NULL;
  94        }
  95
  96        field = kzalloc((sizeof(struct hid_field) +
  97                         usages * sizeof(struct hid_usage) +
  98                         values * sizeof(unsigned)), GFP_KERNEL);
  99        if (!field)
 100                return NULL;
 101
 102        field->index = report->maxfield++;
 103        report->field[field->index] = field;
 104        field->usage = (struct hid_usage *)(field + 1);
 105        field->value = (s32 *)(field->usage + usages);
 106        field->report = report;
 107
 108        return field;
 109}
 110
 111/*
 112 * Open a collection. The type/usage is pushed on the stack.
 113 */
 114
 115static int open_collection(struct hid_parser *parser, unsigned type)
 116{
 117        struct hid_collection *collection;
 118        unsigned usage;
 119
 120        usage = parser->local.usage[0];
 121
 122        if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
 123                dbg_hid("collection stack overflow\n");
 124                return -1;
 125        }
 126
 127        if (parser->device->maxcollection == parser->device->collection_size) {
 128                collection = kmalloc(sizeof(struct hid_collection) *
 129                                parser->device->collection_size * 2, GFP_KERNEL);
 130                if (collection == NULL) {
 131                        dbg_hid("failed to reallocate collection array\n");
 132                        return -1;
 133                }
 134                memcpy(collection, parser->device->collection,
 135                        sizeof(struct hid_collection) *
 136                        parser->device->collection_size);
 137                memset(collection + parser->device->collection_size, 0,
 138                        sizeof(struct hid_collection) *
 139                        parser->device->collection_size);
 140                kfree(parser->device->collection);
 141                parser->device->collection = collection;
 142                parser->device->collection_size *= 2;
 143        }
 144
 145        parser->collection_stack[parser->collection_stack_ptr++] =
 146                parser->device->maxcollection;
 147
 148        collection = parser->device->collection +
 149                parser->device->maxcollection++;
 150        collection->type = type;
 151        collection->usage = usage;
 152        collection->level = parser->collection_stack_ptr - 1;
 153
 154        if (type == HID_COLLECTION_APPLICATION)
 155                parser->device->maxapplication++;
 156
 157        return 0;
 158}
 159
 160/*
 161 * Close a collection.
 162 */
 163
 164static int close_collection(struct hid_parser *parser)
 165{
 166        if (!parser->collection_stack_ptr) {
 167                dbg_hid("collection stack underflow\n");
 168                return -1;
 169        }
 170        parser->collection_stack_ptr--;
 171        return 0;
 172}
 173
 174/*
 175 * Climb up the stack, search for the specified collection type
 176 * and return the usage.
 177 */
 178
 179static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
 180{
 181        struct hid_collection *collection = parser->device->collection;
 182        int n;
 183
 184        for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
 185                unsigned index = parser->collection_stack[n];
 186                if (collection[index].type == type)
 187                        return collection[index].usage;
 188        }
 189        return 0; /* we know nothing about this usage type */
 190}
 191
 192/*
 193 * Add a usage to the temporary parser table.
 194 */
 195
 196static int hid_add_usage(struct hid_parser *parser, unsigned usage)
 197{
 198        if (parser->local.usage_index >= HID_MAX_USAGES) {
 199                dbg_hid("usage index exceeded\n");
 200                return -1;
 201        }
 202        parser->local.usage[parser->local.usage_index] = usage;
 203        parser->local.collection_index[parser->local.usage_index] =
 204                parser->collection_stack_ptr ?
 205                parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
 206        parser->local.usage_index++;
 207        return 0;
 208}
 209
 210/*
 211 * Register a new field for this report.
 212 */
 213
 214static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
 215{
 216        struct hid_report *report;
 217        struct hid_field *field;
 218        int usages;
 219        unsigned offset;
 220        int i;
 221
 222        report = hid_register_report(parser->device, report_type, parser->global.report_id);
 223        if (!report) {
 224                dbg_hid("hid_register_report failed\n");
 225                return -1;
 226        }
 227
 228        if (parser->global.logical_maximum < parser->global.logical_minimum) {
 229                dbg_hid("logical range invalid %d %d\n", parser->global.logical_minimum, parser->global.logical_maximum);
 230                return -1;
 231        }
 232
 233        offset = report->size;
 234        report->size += parser->global.report_size * parser->global.report_count;
 235
 236        if (!parser->local.usage_index) /* Ignore padding fields */
 237                return 0;
 238
 239        usages = max_t(int, parser->local.usage_index, parser->global.report_count);
 240
 241        field = hid_register_field(report, usages, parser->global.report_count);
 242        if (!field)
 243                return 0;
 244
 245        field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
 246        field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
 247        field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 248
 249        for (i = 0; i < usages; i++) {
 250                int j = i;
 251                /* Duplicate the last usage we parsed if we have excess values */
 252                if (i >= parser->local.usage_index)
 253                        j = parser->local.usage_index - 1;
 254                field->usage[i].hid = parser->local.usage[j];
 255                field->usage[i].collection_index =
 256                        parser->local.collection_index[j];
 257        }
 258
 259        field->maxusage = usages;
 260        field->flags = flags;
 261        field->report_offset = offset;
 262        field->report_type = report_type;
 263        field->report_size = parser->global.report_size;
 264        field->report_count = parser->global.report_count;
 265        field->logical_minimum = parser->global.logical_minimum;
 266        field->logical_maximum = parser->global.logical_maximum;
 267        field->physical_minimum = parser->global.physical_minimum;
 268        field->physical_maximum = parser->global.physical_maximum;
 269        field->unit_exponent = parser->global.unit_exponent;
 270        field->unit = parser->global.unit;
 271
 272        return 0;
 273}
 274
 275/*
 276 * Read data value from item.
 277 */
 278
 279static u32 item_udata(struct hid_item *item)
 280{
 281        switch (item->size) {
 282        case 1: return item->data.u8;
 283        case 2: return item->data.u16;
 284        case 4: return item->data.u32;
 285        }
 286        return 0;
 287}
 288
 289static s32 item_sdata(struct hid_item *item)
 290{
 291        switch (item->size) {
 292        case 1: return item->data.s8;
 293        case 2: return item->data.s16;
 294        case 4: return item->data.s32;
 295        }
 296        return 0;
 297}
 298
 299/*
 300 * Process a global item.
 301 */
 302
 303static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
 304{
 305        switch (item->tag) {
 306        case HID_GLOBAL_ITEM_TAG_PUSH:
 307
 308                if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
 309                        dbg_hid("global enviroment stack overflow\n");
 310                        return -1;
 311                }
 312
 313                memcpy(parser->global_stack + parser->global_stack_ptr++,
 314                        &parser->global, sizeof(struct hid_global));
 315                return 0;
 316
 317        case HID_GLOBAL_ITEM_TAG_POP:
 318
 319                if (!parser->global_stack_ptr) {
 320                        dbg_hid("global enviroment stack underflow\n");
 321                        return -1;
 322                }
 323
 324                memcpy(&parser->global, parser->global_stack +
 325                        --parser->global_stack_ptr, sizeof(struct hid_global));
 326                return 0;
 327
 328        case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 329                parser->global.usage_page = item_udata(item);
 330                return 0;
 331
 332        case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 333                parser->global.logical_minimum = item_sdata(item);
 334                return 0;
 335
 336        case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 337                if (parser->global.logical_minimum < 0)
 338                        parser->global.logical_maximum = item_sdata(item);
 339                else
 340                        parser->global.logical_maximum = item_udata(item);
 341                return 0;
 342
 343        case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 344                parser->global.physical_minimum = item_sdata(item);
 345                return 0;
 346
 347        case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 348                if (parser->global.physical_minimum < 0)
 349                        parser->global.physical_maximum = item_sdata(item);
 350                else
 351                        parser->global.physical_maximum = item_udata(item);
 352                return 0;
 353
 354        case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 355                parser->global.unit_exponent = item_sdata(item);
 356                return 0;
 357
 358        case HID_GLOBAL_ITEM_TAG_UNIT:
 359                parser->global.unit = item_udata(item);
 360                return 0;
 361
 362        case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 363                parser->global.report_size = item_udata(item);
 364                if (parser->global.report_size > 32) {
 365                        dbg_hid("invalid report_size %d\n",
 366                                        parser->global.report_size);
 367                        return -1;
 368                }
 369                return 0;
 370
 371        case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 372                parser->global.report_count = item_udata(item);
 373                if (parser->global.report_count > HID_MAX_USAGES) {
 374                        dbg_hid("invalid report_count %d\n",
 375                                        parser->global.report_count);
 376                        return -1;
 377                }
 378                return 0;
 379
 380        case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 381                parser->global.report_id = item_udata(item);
 382                if (parser->global.report_id == 0) {
 383                        dbg_hid("report_id 0 is invalid\n");
 384                        return -1;
 385                }
 386                return 0;
 387
 388        default:
 389                dbg_hid("unknown global tag 0x%x\n", item->tag);
 390                return -1;
 391        }
 392}
 393
 394/*
 395 * Process a local item.
 396 */
 397
 398static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 399{
 400        __u32 data;
 401        unsigned n;
 402
 403        data = item_udata(item);
 404
 405        switch (item->tag) {
 406        case HID_LOCAL_ITEM_TAG_DELIMITER:
 407
 408                if (data) {
 409                        /*
 410                         * We treat items before the first delimiter
 411                         * as global to all usage sets (branch 0).
 412                         * In the moment we process only these global
 413                         * items and the first delimiter set.
 414                         */
 415                        if (parser->local.delimiter_depth != 0) {
 416                                dbg_hid("nested delimiters\n");
 417                                return -1;
 418                        }
 419                        parser->local.delimiter_depth++;
 420                        parser->local.delimiter_branch++;
 421                } else {
 422                        if (parser->local.delimiter_depth < 1) {
 423                                dbg_hid("bogus close delimiter\n");
 424                                return -1;
 425                        }
 426                        parser->local.delimiter_depth--;
 427                }
 428                return 1;
 429
 430        case HID_LOCAL_ITEM_TAG_USAGE:
 431
 432                if (parser->local.delimiter_branch > 1) {
 433                        dbg_hid("alternative usage ignored\n");
 434                        return 0;
 435                }
 436
 437                if (item->size <= 2)
 438                        data = (parser->global.usage_page << 16) + data;
 439
 440                return hid_add_usage(parser, data);
 441
 442        case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 443
 444                if (parser->local.delimiter_branch > 1) {
 445                        dbg_hid("alternative usage ignored\n");
 446                        return 0;
 447                }
 448
 449                if (item->size <= 2)
 450                        data = (parser->global.usage_page << 16) + data;
 451
 452                parser->local.usage_minimum = data;
 453                return 0;
 454
 455        case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 456
 457                if (parser->local.delimiter_branch > 1) {
 458                        dbg_hid("alternative usage ignored\n");
 459                        return 0;
 460                }
 461
 462                if (item->size <= 2)
 463                        data = (parser->global.usage_page << 16) + data;
 464
 465                for (n = parser->local.usage_minimum; n <= data; n++)
 466                        if (hid_add_usage(parser, n)) {
 467                                dbg_hid("hid_add_usage failed\n");
 468                                return -1;
 469                        }
 470                return 0;
 471
 472        default:
 473
 474                dbg_hid("unknown local item tag 0x%x\n", item->tag);
 475                return 0;
 476        }
 477        return 0;
 478}
 479
 480/*
 481 * Process a main item.
 482 */
 483
 484static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
 485{
 486        __u32 data;
 487        int ret;
 488
 489        data = item_udata(item);
 490
 491        switch (item->tag) {
 492        case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 493                ret = open_collection(parser, data & 0xff);
 494                break;
 495        case HID_MAIN_ITEM_TAG_END_COLLECTION:
 496                ret = close_collection(parser);
 497                break;
 498        case HID_MAIN_ITEM_TAG_INPUT:
 499                ret = hid_add_field(parser, HID_INPUT_REPORT, data);
 500                break;
 501        case HID_MAIN_ITEM_TAG_OUTPUT:
 502                ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
 503                break;
 504        case HID_MAIN_ITEM_TAG_FEATURE:
 505                ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
 506                break;
 507        default:
 508                dbg_hid("unknown main item tag 0x%x\n", item->tag);
 509                ret = 0;
 510        }
 511
 512        memset(&parser->local, 0, sizeof(parser->local));       /* Reset the local parser environment */
 513
 514        return ret;
 515}
 516
 517/*
 518 * Process a reserved item.
 519 */
 520
 521static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
 522{
 523        dbg_hid("reserved item type, tag 0x%x\n", item->tag);
 524        return 0;
 525}
 526
 527/*
 528 * Free a report and all registered fields. The field->usage and
 529 * field->value table's are allocated behind the field, so we need
 530 * only to free(field) itself.
 531 */
 532
 533static void hid_free_report(struct hid_report *report)
 534{
 535        unsigned n;
 536
 537        for (n = 0; n < report->maxfield; n++)
 538                kfree(report->field[n]);
 539        kfree(report);
 540}
 541
 542/*
 543 * Free a device structure, all reports, and all fields.
 544 */
 545
 546static void hid_device_release(struct device *dev)
 547{
 548        struct hid_device *device = container_of(dev, struct hid_device, dev);
 549        unsigned i, j;
 550
 551        for (i = 0; i < HID_REPORT_TYPES; i++) {
 552                struct hid_report_enum *report_enum = device->report_enum + i;
 553
 554                for (j = 0; j < 256; j++) {
 555                        struct hid_report *report = report_enum->report_id_hash[j];
 556                        if (report)
 557                                hid_free_report(report);
 558                }
 559        }
 560
 561        kfree(device->rdesc);
 562        kfree(device->collection);
 563        kfree(device);
 564}
 565
 566/*
 567 * Fetch a report description item from the data stream. We support long
 568 * items, though they are not used yet.
 569 */
 570
 571static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
 572{
 573        u8 b;
 574
 575        if ((end - start) <= 0)
 576                return NULL;
 577
 578        b = *start++;
 579
 580        item->type = (b >> 2) & 3;
 581        item->tag  = (b >> 4) & 15;
 582
 583        if (item->tag == HID_ITEM_TAG_LONG) {
 584
 585                item->format = HID_ITEM_FORMAT_LONG;
 586
 587                if ((end - start) < 2)
 588                        return NULL;
 589
 590                item->size = *start++;
 591                item->tag  = *start++;
 592
 593                if ((end - start) < item->size)
 594                        return NULL;
 595
 596                item->data.longdata = start;
 597                start += item->size;
 598                return start;
 599        }
 600
 601        item->format = HID_ITEM_FORMAT_SHORT;
 602        item->size = b & 3;
 603
 604        switch (item->size) {
 605        case 0:
 606                return start;
 607
 608        case 1:
 609                if ((end - start) < 1)
 610                        return NULL;
 611                item->data.u8 = *start++;
 612                return start;
 613
 614        case 2:
 615                if ((end - start) < 2)
 616                        return NULL;
 617                item->data.u16 = get_unaligned_le16(start);
 618                start = (__u8 *)((__le16 *)start + 1);
 619                return start;
 620
 621        case 3:
 622                item->size++;
 623                if ((end - start) < 4)
 624                        return NULL;
 625                item->data.u32 = get_unaligned_le32(start);
 626                start = (__u8 *)((__le32 *)start + 1);
 627                return start;
 628        }
 629
 630        return NULL;
 631}
 632
 633/**
 634 * hid_parse_report - parse device report
 635 *
 636 * @device: hid device
 637 * @start: report start
 638 * @size: report size
 639 *
 640 * Parse a report description into a hid_device structure. Reports are
 641 * enumerated, fields are attached to these reports.
 642 * 0 returned on success, otherwise nonzero error value.
 643 */
 644int hid_parse_report(struct hid_device *device, __u8 *start,
 645                unsigned size)
 646{
 647        struct hid_parser *parser;
 648        struct hid_item item;
 649        __u8 *end;
 650        int ret;
 651        static int (*dispatch_type[])(struct hid_parser *parser,
 652                                      struct hid_item *item) = {
 653                hid_parser_main,
 654                hid_parser_global,
 655                hid_parser_local,
 656                hid_parser_reserved
 657        };
 658
 659        if (device->driver->report_fixup)
 660                start = device->driver->report_fixup(device, start, &size);
 661
 662        device->rdesc = kmemdup(start, size, GFP_KERNEL);
 663        if (device->rdesc == NULL)
 664                return -ENOMEM;
 665        device->rsize = size;
 666
 667        parser = vzalloc(sizeof(struct hid_parser));
 668        if (!parser) {
 669                ret = -ENOMEM;
 670                goto err;
 671        }
 672
 673        parser->device = device;
 674
 675        end = start + size;
 676        ret = -EINVAL;
 677        while ((start = fetch_item(start, end, &item)) != NULL) {
 678
 679                if (item.format != HID_ITEM_FORMAT_SHORT) {
 680                        dbg_hid("unexpected long global item\n");
 681                        goto err;
 682                }
 683
 684                if (dispatch_type[item.type](parser, &item)) {
 685                        dbg_hid("item %u %u %u %u parsing failed\n",
 686                                item.format, (unsigned)item.size,
 687                                (unsigned)item.type, (unsigned)item.tag);
 688                        goto err;
 689                }
 690
 691                if (start == end) {
 692                        if (parser->collection_stack_ptr) {
 693                                dbg_hid("unbalanced collection at end of report description\n");
 694                                goto err;
 695                        }
 696                        if (parser->local.delimiter_depth) {
 697                                dbg_hid("unbalanced delimiter at end of report description\n");
 698                                goto err;
 699                        }
 700                        vfree(parser);
 701                        return 0;
 702                }
 703        }
 704
 705        dbg_hid("item fetching failed at offset %d\n", (int)(end - start));
 706err:
 707        vfree(parser);
 708        return ret;
 709}
 710EXPORT_SYMBOL_GPL(hid_parse_report);
 711
 712/*
 713 * Convert a signed n-bit integer to signed 32-bit integer. Common
 714 * cases are done through the compiler, the screwed things has to be
 715 * done by hand.
 716 */
 717
 718static s32 snto32(__u32 value, unsigned n)
 719{
 720        switch (n) {
 721        case 8:  return ((__s8)value);
 722        case 16: return ((__s16)value);
 723        case 32: return ((__s32)value);
 724        }
 725        return value & (1 << (n - 1)) ? value | (-1 << n) : value;
 726}
 727
 728/*
 729 * Convert a signed 32-bit integer to a signed n-bit integer.
 730 */
 731
 732static u32 s32ton(__s32 value, unsigned n)
 733{
 734        s32 a = value >> (n - 1);
 735        if (a && a != -1)
 736                return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
 737        return value & ((1 << n) - 1);
 738}
 739
 740/*
 741 * Extract/implement a data field from/to a little endian report (bit array).
 742 *
 743 * Code sort-of follows HID spec:
 744 *     http://www.usb.org/developers/devclass_docs/HID1_11.pdf
 745 *
 746 * While the USB HID spec allows unlimited length bit fields in "report
 747 * descriptors", most devices never use more than 16 bits.
 748 * One model of UPS is claimed to report "LINEV" as a 32-bit field.
 749 * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
 750 */
 751
 752static __u32 extract(const struct hid_device *hid, __u8 *report,
 753                     unsigned offset, unsigned n)
 754{
 755        u64 x;
 756
 757        if (n > 32)
 758                hid_warn(hid, "extract() called with n (%d) > 32! (%s)\n",
 759                         n, current->comm);
 760
 761        report += offset >> 3;  /* adjust byte index */
 762        offset &= 7;            /* now only need bit offset into one byte */
 763        x = get_unaligned_le64(report);
 764        x = (x >> offset) & ((1ULL << n) - 1);  /* extract bit field */
 765        return (u32) x;
 766}
 767
 768/*
 769 * "implement" : set bits in a little endian bit stream.
 770 * Same concepts as "extract" (see comments above).
 771 * The data mangled in the bit stream remains in little endian
 772 * order the whole time. It make more sense to talk about
 773 * endianness of register values by considering a register
 774 * a "cached" copy of the little endiad bit stream.
 775 */
 776static void implement(const struct hid_device *hid, __u8 *report,
 777                      unsigned offset, unsigned n, __u32 value)
 778{
 779        u64 x;
 780        u64 m = (1ULL << n) - 1;
 781
 782        if (n > 32)
 783                hid_warn(hid, "%s() called with n (%d) > 32! (%s)\n",
 784                         __func__, n, current->comm);
 785
 786        if (value > m)
 787                hid_warn(hid, "%s() called with too large value %d! (%s)\n",
 788                         __func__, value, current->comm);
 789        WARN_ON(value > m);
 790        value &= m;
 791
 792        report += offset >> 3;
 793        offset &= 7;
 794
 795        x = get_unaligned_le64(report);
 796        x &= ~(m << offset);
 797        x |= ((u64)value) << offset;
 798        put_unaligned_le64(x, report);
 799}
 800
 801/*
 802 * Search an array for a value.
 803 */
 804
 805static int search(__s32 *array, __s32 value, unsigned n)
 806{
 807        while (n--) {
 808                if (*array++ == value)
 809                        return 0;
 810        }
 811        return -1;
 812}
 813
 814/**
 815 * hid_match_report - check if driver's raw_event should be called
 816 *
 817 * @hid: hid device
 818 * @report_type: type to match against
 819 *
 820 * compare hid->driver->report_table->report_type to report->type
 821 */
 822static int hid_match_report(struct hid_device *hid, struct hid_report *report)
 823{
 824        const struct hid_report_id *id = hid->driver->report_table;
 825
 826        if (!id) /* NULL means all */
 827                return 1;
 828
 829        for (; id->report_type != HID_TERMINATOR; id++)
 830                if (id->report_type == HID_ANY_ID ||
 831                                id->report_type == report->type)
 832                        return 1;
 833        return 0;
 834}
 835
 836/**
 837 * hid_match_usage - check if driver's event should be called
 838 *
 839 * @hid: hid device
 840 * @usage: usage to match against
 841 *
 842 * compare hid->driver->usage_table->usage_{type,code} to
 843 * usage->usage_{type,code}
 844 */
 845static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
 846{
 847        const struct hid_usage_id *id = hid->driver->usage_table;
 848
 849        if (!id) /* NULL means all */
 850                return 1;
 851
 852        for (; id->usage_type != HID_ANY_ID - 1; id++)
 853                if ((id->usage_hid == HID_ANY_ID ||
 854                                id->usage_hid == usage->hid) &&
 855                                (id->usage_type == HID_ANY_ID ||
 856                                id->usage_type == usage->type) &&
 857                                (id->usage_code == HID_ANY_ID ||
 858                                 id->usage_code == usage->code))
 859                        return 1;
 860        return 0;
 861}
 862
 863static void hid_process_event(struct hid_device *hid, struct hid_field *field,
 864                struct hid_usage *usage, __s32 value, int interrupt)
 865{
 866        struct hid_driver *hdrv = hid->driver;
 867        int ret;
 868
 869        hid_dump_input(hid, usage, value);
 870
 871        if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
 872                ret = hdrv->event(hid, field, usage, value);
 873                if (ret != 0) {
 874                        if (ret < 0)
 875                                dbg_hid("%s's event failed with %d\n",
 876                                                hdrv->name, ret);
 877                        return;
 878                }
 879        }
 880
 881        if (hid->claimed & HID_CLAIMED_INPUT)
 882                hidinput_hid_event(hid, field, usage, value);
 883        if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
 884                hid->hiddev_hid_event(hid, field, usage, value);
 885}
 886
 887/*
 888 * Analyse a received field, and fetch the data from it. The field
 889 * content is stored for next report processing (we do differential
 890 * reporting to the layer).
 891 */
 892
 893static void hid_input_field(struct hid_device *hid, struct hid_field *field,
 894                            __u8 *data, int interrupt)
 895{
 896        unsigned n;
 897        unsigned count = field->report_count;
 898        unsigned offset = field->report_offset;
 899        unsigned size = field->report_size;
 900        __s32 min = field->logical_minimum;
 901        __s32 max = field->logical_maximum;
 902        __s32 *value;
 903
 904        value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC);
 905        if (!value)
 906                return;
 907
 908        for (n = 0; n < count; n++) {
 909
 910                value[n] = min < 0 ?
 911                        snto32(extract(hid, data, offset + n * size, size),
 912                               size) :
 913                        extract(hid, data, offset + n * size, size);
 914
 915                /* Ignore report if ErrorRollOver */
 916                if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
 917                    value[n] >= min && value[n] <= max &&
 918                    field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
 919                        goto exit;
 920        }
 921
 922        for (n = 0; n < count; n++) {
 923
 924                if (HID_MAIN_ITEM_VARIABLE & field->flags) {
 925                        hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
 926                        continue;
 927                }
 928
 929                if (field->value[n] >= min && field->value[n] <= max
 930                        && field->usage[field->value[n] - min].hid
 931                        && search(value, field->value[n], count))
 932                                hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
 933
 934                if (value[n] >= min && value[n] <= max
 935                        && field->usage[value[n] - min].hid
 936                        && search(field->value, value[n], count))
 937                                hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
 938        }
 939
 940        memcpy(field->value, value, count * sizeof(__s32));
 941exit:
 942        kfree(value);
 943}
 944
 945/*
 946 * Output the field into the report.
 947 */
 948
 949static void hid_output_field(const struct hid_device *hid,
 950                             struct hid_field *field, __u8 *data)
 951{
 952        unsigned count = field->report_count;
 953        unsigned offset = field->report_offset;
 954        unsigned size = field->report_size;
 955        unsigned n;
 956
 957        for (n = 0; n < count; n++) {
 958                if (field->logical_minimum < 0) /* signed values */
 959                        implement(hid, data, offset + n * size, size,
 960                                  s32ton(field->value[n], size));
 961                else                            /* unsigned values */
 962                        implement(hid, data, offset + n * size, size,
 963                                  field->value[n]);
 964        }
 965}
 966
 967/*
 968 * Create a report.
 969 */
 970
 971void hid_output_report(struct hid_report *report, __u8 *data)
 972{
 973        unsigned n;
 974
 975        if (report->id > 0)
 976                *data++ = report->id;
 977
 978        memset(data, 0, ((report->size - 1) >> 3) + 1);
 979        for (n = 0; n < report->maxfield; n++)
 980                hid_output_field(report->device, report->field[n], data);
 981}
 982EXPORT_SYMBOL_GPL(hid_output_report);
 983
 984/*
 985 * Set a field value. The report this field belongs to has to be
 986 * created and transferred to the device, to set this value in the
 987 * device.
 988 */
 989
 990int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
 991{
 992        unsigned size = field->report_size;
 993
 994        hid_dump_input(field->report->device, field->usage + offset, value);
 995
 996        if (offset >= field->report_count) {
 997                dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count);
 998                return -1;
 999        }
1000        if (field->logical_minimum < 0) {
1001                if (value != snto32(s32ton(value, size), size)) {
1002                        dbg_hid("value %d is out of range\n", value);
1003                        return -1;
1004                }
1005        }
1006        field->value[offset] = value;
1007        return 0;
1008}
1009EXPORT_SYMBOL_GPL(hid_set_field);
1010
1011static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1012                const u8 *data)
1013{
1014        struct hid_report *report;
1015        unsigned int n = 0;     /* Normally report number is 0 */
1016
1017        /* Device uses numbered reports, data[0] is report number */
1018        if (report_enum->numbered)
1019                n = *data;
1020
1021        report = report_enum->report_id_hash[n];
1022        if (report == NULL)
1023                dbg_hid("undefined report_id %u received\n", n);
1024
1025        return report;
1026}
1027
1028void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1029                int interrupt)
1030{
1031        struct hid_report_enum *report_enum = hid->report_enum + type;
1032        struct hid_report *report;
1033        unsigned int a;
1034        int rsize, csize = size;
1035        u8 *cdata = data;
1036
1037        report = hid_get_report(report_enum, data);
1038        if (!report)
1039                return;
1040
1041        if (report_enum->numbered) {
1042                cdata++;
1043                csize--;
1044        }
1045
1046        rsize = ((report->size - 1) >> 3) + 1;
1047
1048        if (csize < rsize) {
1049                dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1050                                csize, rsize);
1051                memset(cdata + csize, 0, rsize - csize);
1052        }
1053
1054        if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1055                hid->hiddev_report_event(hid, report);
1056        if (hid->claimed & HID_CLAIMED_HIDRAW)
1057                hidraw_report_event(hid, data, size);
1058
1059        for (a = 0; a < report->maxfield; a++)
1060                hid_input_field(hid, report->field[a], cdata, interrupt);
1061
1062        if (hid->claimed & HID_CLAIMED_INPUT)
1063                hidinput_report_event(hid, report);
1064}
1065EXPORT_SYMBOL_GPL(hid_report_raw_event);
1066
1067/**
1068 * hid_input_report - report data from lower layer (usb, bt...)
1069 *
1070 * @hid: hid device
1071 * @type: HID report type (HID_*_REPORT)
1072 * @data: report contents
1073 * @size: size of data parameter
1074 * @interrupt: distinguish between interrupt and control transfers
1075 *
1076 * This is data entry for lower layers.
1077 */
1078int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
1079{
1080        struct hid_report_enum *report_enum;
1081        struct hid_driver *hdrv;
1082        struct hid_report *report;
1083        char *buf;
1084        unsigned int i;
1085        int ret;
1086
1087        if (!hid || !hid->driver)
1088                return -ENODEV;
1089        report_enum = hid->report_enum + type;
1090        hdrv = hid->driver;
1091
1092        if (!size) {
1093                dbg_hid("empty report\n");
1094                return -1;
1095        }
1096
1097        buf = kmalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_ATOMIC);
1098
1099        if (!buf)
1100                goto nomem;
1101
1102        /* dump the report */
1103        snprintf(buf, HID_DEBUG_BUFSIZE - 1,
1104                        "\nreport (size %u) (%snumbered) = ", size, report_enum->numbered ? "" : "un");
1105        hid_debug_event(hid, buf);
1106
1107        for (i = 0; i < size; i++) {
1108                snprintf(buf, HID_DEBUG_BUFSIZE - 1,
1109                                " %02x", data[i]);
1110                hid_debug_event(hid, buf);
1111        }
1112        hid_debug_event(hid, "\n");
1113        kfree(buf);
1114
1115nomem:
1116        report = hid_get_report(report_enum, data);
1117
1118        if (!report)
1119                return -1;
1120
1121        if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1122                ret = hdrv->raw_event(hid, report, data, size);
1123                if (ret != 0)
1124                        return ret < 0 ? ret : 0;
1125        }
1126
1127        hid_report_raw_event(hid, type, data, size, interrupt);
1128
1129        return 0;
1130}
1131EXPORT_SYMBOL_GPL(hid_input_report);
1132
1133static bool hid_match_one_id(struct hid_device *hdev,
1134                const struct hid_device_id *id)
1135{
1136        return id->bus == hdev->bus &&
1137                (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1138                (id->product == HID_ANY_ID || id->product == hdev->product);
1139}
1140
1141static const struct hid_device_id *hid_match_id(struct hid_device *hdev,
1142                const struct hid_device_id *id)
1143{
1144        for (; id->bus; id++)
1145                if (hid_match_one_id(hdev, id))
1146                        return id;
1147
1148        return NULL;
1149}
1150
1151static const struct hid_device_id hid_hiddev_list[] = {
1152        { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1153        { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1154        { }
1155};
1156
1157static bool hid_hiddev(struct hid_device *hdev)
1158{
1159        return !!hid_match_id(hdev, hid_hiddev_list);
1160}
1161
1162int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1163{
1164        static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1165                "Joystick", "Gamepad", "Keyboard", "Keypad",
1166                "Multi-Axis Controller"
1167        };
1168        const char *type, *bus;
1169        char buf[64];
1170        unsigned int i;
1171        int len;
1172
1173        if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
1174                connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
1175        if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
1176                connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
1177        if (hdev->bus != BUS_USB)
1178                connect_mask &= ~HID_CONNECT_HIDDEV;
1179        if (hid_hiddev(hdev))
1180                connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1181
1182        if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1183                                connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1184                hdev->claimed |= HID_CLAIMED_INPUT;
1185        if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1186                        !hdev->hiddev_connect(hdev,
1187                                connect_mask & HID_CONNECT_HIDDEV_FORCE))
1188                hdev->claimed |= HID_CLAIMED_HIDDEV;
1189        if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1190                hdev->claimed |= HID_CLAIMED_HIDRAW;
1191
1192        if (!hdev->claimed) {
1193                hid_err(hdev, "claimed by neither input, hiddev nor hidraw\n");
1194                return -ENODEV;
1195        }
1196
1197        if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1198                        (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1199                hdev->ff_init(hdev);
1200
1201        len = 0;
1202        if (hdev->claimed & HID_CLAIMED_INPUT)
1203                len += sprintf(buf + len, "input");
1204        if (hdev->claimed & HID_CLAIMED_HIDDEV)
1205                len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1206                                hdev->minor);
1207        if (hdev->claimed & HID_CLAIMED_HIDRAW)
1208                len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1209                                ((struct hidraw *)hdev->hidraw)->minor);
1210
1211        type = "Device";
1212        for (i = 0; i < hdev->maxcollection; i++) {
1213                struct hid_collection *col = &hdev->collection[i];
1214                if (col->type == HID_COLLECTION_APPLICATION &&
1215                   (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1216                   (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1217                        type = types[col->usage & 0xffff];
1218                        break;
1219                }
1220        }
1221
1222        switch (hdev->bus) {
1223        case BUS_USB:
1224                bus = "USB";
1225                break;
1226        case BUS_BLUETOOTH:
1227                bus = "BLUETOOTH";
1228                break;
1229        default:
1230                bus = "<UNKNOWN>";
1231        }
1232
1233        hid_info(hdev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1234                 buf, bus, hdev->version >> 8, hdev->version & 0xff,
1235                 type, hdev->name, hdev->phys);
1236
1237        return 0;
1238}
1239EXPORT_SYMBOL_GPL(hid_connect);
1240
1241void hid_disconnect(struct hid_device *hdev)
1242{
1243        if (hdev->claimed & HID_CLAIMED_INPUT)
1244                hidinput_disconnect(hdev);
1245        if (hdev->claimed & HID_CLAIMED_HIDDEV)
1246                hdev->hiddev_disconnect(hdev);
1247        if (hdev->claimed & HID_CLAIMED_HIDRAW)
1248                hidraw_disconnect(hdev);
1249}
1250EXPORT_SYMBOL_GPL(hid_disconnect);
1251
1252/* a list of devices for which there is a specialized driver on HID bus */
1253static const struct hid_device_id hid_have_special_driver[] = {
1254        { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
1255        { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
1256        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
1257        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
1258        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
1259        { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
1260        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
1261        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
1262        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
1263        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
1264        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
1265        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1266        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1267        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1268        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1269        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1270        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1271        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1272        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1273        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1274        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1275        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1276        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
1277        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
1278        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
1279        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
1280        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
1281        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
1282        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1283        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1284        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1285        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
1286        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
1287        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
1288        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1289        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1290        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1291        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1292        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1293        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1294        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1295        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1296        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1297        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1298        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1299        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1300        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1301        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1302        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1303        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1304        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1305        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1306        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI) },
1307        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO) },
1308        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_JIS) },
1309        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1310        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1311        { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT) },
1312        { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1313        { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
1314        { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
1315        { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
1316        { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1317        { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1318        { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
1319        { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
1320        { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1321        { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
1322        { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
1323        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
1324        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
1325        { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
1326        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
1327        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
1328        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
1329        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
1330        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
1331        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
1332        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
1333        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
1334        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
1335        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
1336        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
1337        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
1338        { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
1339        { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
1340        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
1341        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
1342        { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1343        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
1344        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
1345        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
1346        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
1347        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
1348        { HID_USB_DEVICE(USB_VENDOR_ID_HANVON, USB_DEVICE_ID_HANVON_MULTITOUCH) },
1349        { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
1350        { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
1351        { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
1352        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
1353        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
1354        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
1355        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
1356        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
1357        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
1358        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
1359        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
1360        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
1361        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
1362        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
1363        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD_CORD) },
1364        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
1365        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
1366        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
1367        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_FFG ) },
1368        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
1369        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FLIGHT_SYSTEM_G940) },
1370        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
1371        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
1372        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
1373        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WII_WHEEL) },
1374        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
1375        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
1376        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
1377        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
1378        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
1379        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
1380        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
1381        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
1382        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
1383        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
1384        { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
1385        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
1386        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1) },
1387        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2) },
1388        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3) },
1389        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4) },
1390        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5) },
1391        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6) },
1392        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7) },
1393        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8) },
1394        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9) },
1395        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10) },
1396        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11) },
1397        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12) },
1398        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13) },
1399        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14) },
1400        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15) },
1401        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16) },
1402        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17) },
1403        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
1404        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
1405        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
1406        { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
1407        { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1408        { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },
1409        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
1410        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPLUS) },
1411        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
1412        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
1413        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
1414        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1415        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1416        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
1417        { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) },
1418        { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, USB_DEVICE_ID_MTP_STM) },
1419        { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX, USB_DEVICE_ID_MTP_SITRONIX) },
1420        { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
1421        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
1422        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
1423        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323) },
1424        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324) },
1425        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
1426        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653) },
1427        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
1428        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a) },
1429        { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
1430        { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, USB_DEVICE_ID_TOPSEED2_RF_COMBO) },
1431        { HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
1432        { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1433        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
1434        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
1435        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
1436        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
1437        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
1438        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
1439        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
1440        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
1441        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
1442        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
1443        { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
1444        { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
1445        { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
1446
1447        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
1448        { }
1449};
1450
1451struct hid_dynid {
1452        struct list_head list;
1453        struct hid_device_id id;
1454};
1455
1456/**
1457 * store_new_id - add a new HID device ID to this driver and re-probe devices
1458 * @driver: target device driver
1459 * @buf: buffer for scanning device ID data
1460 * @count: input size
1461 *
1462 * Adds a new dynamic hid device ID to this driver,
1463 * and causes the driver to probe for all devices again.
1464 */
1465static ssize_t store_new_id(struct device_driver *drv, const char *buf,
1466                size_t count)
1467{
1468        struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1469        struct hid_dynid *dynid;
1470        __u32 bus, vendor, product;
1471        unsigned long driver_data = 0;
1472        int ret;
1473
1474        ret = sscanf(buf, "%x %x %x %lx",
1475                        &bus, &vendor, &product, &driver_data);
1476        if (ret < 3)
1477                return -EINVAL;
1478
1479        dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1480        if (!dynid)
1481                return -ENOMEM;
1482
1483        dynid->id.bus = bus;
1484        dynid->id.vendor = vendor;
1485        dynid->id.product = product;
1486        dynid->id.driver_data = driver_data;
1487
1488        spin_lock(&hdrv->dyn_lock);
1489        list_add_tail(&dynid->list, &hdrv->dyn_list);
1490        spin_unlock(&hdrv->dyn_lock);
1491
1492        ret = 0;
1493        if (get_driver(&hdrv->driver)) {
1494                ret = driver_attach(&hdrv->driver);
1495                put_driver(&hdrv->driver);
1496        }
1497
1498        return ret ? : count;
1499}
1500static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
1501
1502static void hid_free_dynids(struct hid_driver *hdrv)
1503{
1504        struct hid_dynid *dynid, *n;
1505
1506        spin_lock(&hdrv->dyn_lock);
1507        list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1508                list_del(&dynid->list);
1509                kfree(dynid);
1510        }
1511        spin_unlock(&hdrv->dyn_lock);
1512}
1513
1514static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1515                struct hid_driver *hdrv)
1516{
1517        struct hid_dynid *dynid;
1518
1519        spin_lock(&hdrv->dyn_lock);
1520        list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1521                if (hid_match_one_id(hdev, &dynid->id)) {
1522                        spin_unlock(&hdrv->dyn_lock);
1523                        return &dynid->id;
1524                }
1525        }
1526        spin_unlock(&hdrv->dyn_lock);
1527
1528        return hid_match_id(hdev, hdrv->id_table);
1529}
1530
1531static int hid_bus_match(struct device *dev, struct device_driver *drv)
1532{
1533        struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1534        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1535
1536        if (!hid_match_device(hdev, hdrv))
1537                return 0;
1538
1539        /* generic wants all that don't have specialized driver */
1540        if (!strncmp(hdrv->name, "generic-", 8))
1541                return !hid_match_id(hdev, hid_have_special_driver);
1542
1543        return 1;
1544}
1545
1546static int hid_device_probe(struct device *dev)
1547{
1548        struct hid_driver *hdrv = container_of(dev->driver,
1549                        struct hid_driver, driver);
1550        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1551        const struct hid_device_id *id;
1552        int ret = 0;
1553
1554        if (!hdev->driver) {
1555                id = hid_match_device(hdev, hdrv);
1556                if (id == NULL)
1557                        return -ENODEV;
1558
1559                hdev->driver = hdrv;
1560                if (hdrv->probe) {
1561                        ret = hdrv->probe(hdev, id);
1562                } else { /* default probe */
1563                        ret = hid_parse(hdev);
1564                        if (!ret)
1565                                ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1566                }
1567                if (ret)
1568                        hdev->driver = NULL;
1569        }
1570        return ret;
1571}
1572
1573static int hid_device_remove(struct device *dev)
1574{
1575        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1576        struct hid_driver *hdrv = hdev->driver;
1577
1578        if (hdrv) {
1579                if (hdrv->remove)
1580                        hdrv->remove(hdev);
1581                else /* default remove */
1582                        hid_hw_stop(hdev);
1583                hdev->driver = NULL;
1584        }
1585
1586        return 0;
1587}
1588
1589static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
1590{
1591        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1592
1593        if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
1594                        hdev->bus, hdev->vendor, hdev->product))
1595                return -ENOMEM;
1596
1597        if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
1598                return -ENOMEM;
1599
1600        if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
1601                return -ENOMEM;
1602
1603        if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
1604                return -ENOMEM;
1605
1606        if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X",
1607                        hdev->bus, hdev->vendor, hdev->product))
1608                return -ENOMEM;
1609
1610        return 0;
1611}
1612
1613static struct bus_type hid_bus_type = {
1614        .name           = "hid",
1615        .match          = hid_bus_match,
1616        .probe          = hid_device_probe,
1617        .remove         = hid_device_remove,
1618        .uevent         = hid_uevent,
1619};
1620
1621/* a list of devices that shouldn't be handled by HID core at all */
1622static const struct hid_device_id hid_ignore_list[] = {
1623        { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
1624        { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
1625        { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
1626        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
1627        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
1628        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
1629        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
1630        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
1631        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
1632        { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
1633        { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
1634        { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
1635        { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
1636        { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
1637        { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
1638        { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
1639        { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
1640        { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
1641        { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
1642        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
1643        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
1644        { HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
1645        { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
1646        { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
1647        { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
1648        { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
1649        { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
1650        { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
1651        { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
1652        { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) },
1653        { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
1654        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
1655        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
1656        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
1657        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
1658        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
1659        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
1660        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
1661        { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
1662        { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
1663        { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
1664        { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
1665        { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
1666        { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
1667        { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
1668        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
1669        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
1670        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
1671        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
1672        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
1673        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
1674        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
1675        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
1676        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
1677        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
1678        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
1679        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
1680        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
1681        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
1682        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
1683        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
1684        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
1685        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
1686        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
1687        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
1688        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
1689        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
1690        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
1691        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
1692        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
1693        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
1694        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
1695        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
1696        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
1697        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
1698        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
1699        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
1700        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
1701        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
1702        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
1703        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
1704        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
1705        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
1706        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
1707        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
1708        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
1709        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
1710        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
1711        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
1712        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
1713        { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
1714        { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
1715        { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_JESS_YUREX) },
1716        { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
1717        { HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
1718        { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
1719        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_KYE, 0x0058) },
1720        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
1721        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
1722        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
1723        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
1724        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
1725        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
1726        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY1) },
1727        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
1728        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
1729        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
1730        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
1731        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
1732        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
1733        { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
1734        { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
1735        { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
1736        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
1737        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
1738        { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
1739        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
1740        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
1741        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
1742        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
1743        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
1744        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
1745        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
1746        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
1747        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
1748        { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
1749        { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
1750        { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
1751        { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
1752        { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
1753        { HID_USB_DEVICE(USB_VENDOR_ID_PHILIPS, USB_DEVICE_ID_PHILIPS_IEEE802154_DONGLE) },
1754        { HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
1755        { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
1756        { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
1757        { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
1758        { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
1759        { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
1760        { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
1761        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
1762        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
1763        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
1764        { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
1765        { }
1766};
1767
1768/**
1769 * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
1770 *
1771 * There are composite devices for which we want to ignore only a certain
1772 * interface. This is a list of devices for which only the mouse interface will
1773 * be ignored. This allows a dedicated driver to take care of the interface.
1774 */
1775static const struct hid_device_id hid_mouse_ignore_list[] = {
1776        /* appletouch driver */
1777        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1778        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1779        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1780        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1781        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1782        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1783        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1784        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1785        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1786        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1787        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1788        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1789        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1790        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1791        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1792        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1793        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1794        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1795        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1796        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1797        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1798        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1799        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1800        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1801        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1802        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1803        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1804        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1805        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1806        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1807        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1808        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1809        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1810        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1811        { }
1812};
1813
1814static bool hid_ignore(struct hid_device *hdev)
1815{
1816        switch (hdev->vendor) {
1817        case USB_VENDOR_ID_CODEMERCS:
1818                /* ignore all Code Mercenaries IOWarrior devices */
1819                if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
1820                                hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
1821                        return true;
1822                break;
1823        case USB_VENDOR_ID_LOGITECH:
1824                if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
1825                                hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
1826                        return true;
1827                break;
1828        case USB_VENDOR_ID_SOUNDGRAPH:
1829                if (hdev->product >= USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST &&
1830                    hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
1831                        return true;
1832                break;
1833        case USB_VENDOR_ID_HANWANG:
1834                if (hdev->product >= USB_DEVICE_ID_HANWANG_TABLET_FIRST &&
1835                    hdev->product <= USB_DEVICE_ID_HANWANG_TABLET_LAST)
1836                        return true;
1837                break;
1838        }
1839
1840        if (hdev->type == HID_TYPE_USBMOUSE &&
1841                        hid_match_id(hdev, hid_mouse_ignore_list))
1842                return true;
1843
1844        return !!hid_match_id(hdev, hid_ignore_list);
1845}
1846
1847int hid_add_device(struct hid_device *hdev)
1848{
1849        static atomic_t id = ATOMIC_INIT(0);
1850        int ret;
1851
1852        if (WARN_ON(hdev->status & HID_STAT_ADDED))
1853                return -EBUSY;
1854
1855        /* we need to kill them here, otherwise they will stay allocated to
1856         * wait for coming driver */
1857        if (!(hdev->quirks & HID_QUIRK_NO_IGNORE)
1858            && (hid_ignore(hdev) || (hdev->quirks & HID_QUIRK_IGNORE)))
1859                return -ENODEV;
1860
1861        /* XXX hack, any other cleaner solution after the driver core
1862         * is converted to allow more than 20 bytes as the device name? */
1863        dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
1864                     hdev->vendor, hdev->product, atomic_inc_return(&id));
1865
1866        hid_debug_register(hdev, dev_name(&hdev->dev));
1867        ret = device_add(&hdev->dev);
1868        if (!ret)
1869                hdev->status |= HID_STAT_ADDED;
1870        else
1871                hid_debug_unregister(hdev);
1872
1873        return ret;
1874}
1875EXPORT_SYMBOL_GPL(hid_add_device);
1876
1877/**
1878 * hid_allocate_device - allocate new hid device descriptor
1879 *
1880 * Allocate and initialize hid device, so that hid_destroy_device might be
1881 * used to free it.
1882 *
1883 * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
1884 * error value.
1885 */
1886struct hid_device *hid_allocate_device(void)
1887{
1888        struct hid_device *hdev;
1889        unsigned int i;
1890        int ret = -ENOMEM;
1891
1892        hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
1893        if (hdev == NULL)
1894                return ERR_PTR(ret);
1895
1896        device_initialize(&hdev->dev);
1897        hdev->dev.release = hid_device_release;
1898        hdev->dev.bus = &hid_bus_type;
1899
1900        hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
1901                        sizeof(struct hid_collection), GFP_KERNEL);
1902        if (hdev->collection == NULL)
1903                goto err;
1904        hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
1905
1906        for (i = 0; i < HID_REPORT_TYPES; i++)
1907                INIT_LIST_HEAD(&hdev->report_enum[i].report_list);
1908
1909        init_waitqueue_head(&hdev->debug_wait);
1910        INIT_LIST_HEAD(&hdev->debug_list);
1911
1912        return hdev;
1913err:
1914        put_device(&hdev->dev);
1915        return ERR_PTR(ret);
1916}
1917EXPORT_SYMBOL_GPL(hid_allocate_device);
1918
1919static void hid_remove_device(struct hid_device *hdev)
1920{
1921        if (hdev->status & HID_STAT_ADDED) {
1922                device_del(&hdev->dev);
1923                hid_debug_unregister(hdev);
1924                hdev->status &= ~HID_STAT_ADDED;
1925        }
1926}
1927
1928/**
1929 * hid_destroy_device - free previously allocated device
1930 *
1931 * @hdev: hid device
1932 *
1933 * If you allocate hid_device through hid_allocate_device, you should ever
1934 * free by this function.
1935 */
1936void hid_destroy_device(struct hid_device *hdev)
1937{
1938        hid_remove_device(hdev);
1939        put_device(&hdev->dev);
1940}
1941EXPORT_SYMBOL_GPL(hid_destroy_device);
1942
1943int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
1944                const char *mod_name)
1945{
1946        int ret;
1947
1948        hdrv->driver.name = hdrv->name;
1949        hdrv->driver.bus = &hid_bus_type;
1950        hdrv->driver.owner = owner;
1951        hdrv->driver.mod_name = mod_name;
1952
1953        INIT_LIST_HEAD(&hdrv->dyn_list);
1954        spin_lock_init(&hdrv->dyn_lock);
1955
1956        ret = driver_register(&hdrv->driver);
1957        if (ret)
1958                return ret;
1959
1960        ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
1961        if (ret)
1962                driver_unregister(&hdrv->driver);
1963
1964        return ret;
1965}
1966EXPORT_SYMBOL_GPL(__hid_register_driver);
1967
1968void hid_unregister_driver(struct hid_driver *hdrv)
1969{
1970        driver_remove_file(&hdrv->driver, &driver_attr_new_id);
1971        driver_unregister(&hdrv->driver);
1972        hid_free_dynids(hdrv);
1973}
1974EXPORT_SYMBOL_GPL(hid_unregister_driver);
1975
1976int hid_check_keys_pressed(struct hid_device *hid)
1977{
1978        struct hid_input *hidinput;
1979        int i;
1980
1981        if (!(hid->claimed & HID_CLAIMED_INPUT))
1982                return 0;
1983
1984        list_for_each_entry(hidinput, &hid->inputs, list) {
1985                for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
1986                        if (hidinput->input->key[i])
1987                                return 1;
1988        }
1989
1990        return 0;
1991}
1992
1993EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
1994
1995static int __init hid_init(void)
1996{
1997        int ret;
1998
1999        if (hid_debug)
2000                pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
2001                        "debugfs is now used for inspecting the device (report descriptor, reports)\n");
2002
2003        ret = bus_register(&hid_bus_type);
2004        if (ret) {
2005                pr_err("can't register hid bus\n");
2006                goto err;
2007        }
2008
2009        ret = hidraw_init();
2010        if (ret)
2011                goto err_bus;
2012
2013        hid_debug_init();
2014
2015        return 0;
2016err_bus:
2017        bus_unregister(&hid_bus_type);
2018err:
2019        return ret;
2020}
2021
2022static void __exit hid_exit(void)
2023{
2024        hid_debug_exit();
2025        hidraw_exit();
2026        bus_unregister(&hid_bus_type);
2027}
2028
2029module_init(hid_init);
2030module_exit(hid_exit);
2031
2032MODULE_AUTHOR("Andreas Gal");
2033MODULE_AUTHOR("Vojtech Pavlik");
2034MODULE_AUTHOR("Jiri Kosina");
2035MODULE_LICENSE(DRIVER_LICENSE);
2036
2037