drivers/usb/input/hid-core.c

   1 /*
   2  *  USB 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  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/sched.h>
  21 #include <linux/list.h>
  22 #include <linux/mm.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/spinlock.h>
  25 #include <asm/unaligned.h>
  26 #include <asm/byteorder.h>
  27 #include <linux/input.h>
  28 #include <linux/wait.h>
  29
  30 #undef DEBUG
  31 #undef DEBUG_DATA
  32
  33 #include <linux/usb.h>
  34
  35 #include "hid.h"
  36 #include <linux/hiddev.h>
  37
  38 /*
  39  * Version Information
  40  */
  41
  42 #define DRIVER_VERSION "v2.6"
  43 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik"
  44 #define DRIVER_DESC "USB HID core driver"
  45 #define DRIVER_LICENSE "GPL"
  46
  47 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
  48                                 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
  49 /*
  50  * Module parameters.
  51  */
  52
  53 static unsigned int hid_mousepoll_interval;
  54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
  55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
  56
  57 /*
  58  * Register a new report for a device.
  59  */
  60
  61 static struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
  62 {
  63         struct hid_report_enum *report_enum = device->report_enum + type;
  64         struct hid_report *report;
  65
  66         if (report_enum->report_id_hash[id])
  67                 return report_enum->report_id_hash[id];
  68
  69         if (!(report = kmalloc(sizeof(struct hid_report), GFP_KERNEL)))
  70                 return NULL;
  71         memset(report, 0, sizeof(struct hid_report));
  72
  73         if (id != 0)
  74                 report_enum->numbered = 1;
  75
  76         report->id = id;
  77         report->type = type;
  78         report->size = 0;
  79         report->device = device;
  80         report_enum->report_id_hash[id] = report;
  81
  82         list_add_tail(&report->list, &report_enum->report_list);
  83
  84         return report;
  85 }
  86
  87 /*
  88  * Register a new field for this report.
  89  */
  90
  91 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
  92 {
  93         struct hid_field *field;
  94
  95         if (report->maxfield == HID_MAX_FIELDS) {
  96                 dbg("too many fields in report");
  97                 return NULL;
  98         }
  99
 100         if (!(field = kmalloc(sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
 101                 + values * sizeof(unsigned), GFP_KERNEL))) return NULL;
 102
 103         memset(field, 0, sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
 104                 + values * sizeof(unsigned));
 105
 106         field->index = report->maxfield++;
 107         report->field[field->index] = field;
 108         field->usage = (struct hid_usage *)(field + 1);
 109         field->value = (unsigned *)(field->usage + usages);
 110         field->report = report;
 111
 112         return field;
 113 }
 114
 115 /*
 116  * Open a collection. The type/usage is pushed on the stack.
 117  */
 118
 119 static int open_collection(struct hid_parser *parser, unsigned type)
 120 {
 121         struct hid_collection *collection;
 122         unsigned usage;
 123
 124         usage = parser->local.usage[0];
 125
 126         if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
 127                 dbg("collection stack overflow");
 128                 return -1;
 129         }
 130
 131         if (parser->device->maxcollection == parser->device->collection_size) {
 132                 collection = kmalloc(sizeof(struct hid_collection) *
 133                                 parser->device->collection_size * 2, GFP_KERNEL);
 134                 if (collection == NULL) {
 135                         dbg("failed to reallocate collection array");
 136                         return -1;
 137                 }
 138                 memcpy(collection, parser->device->collection,
 139                         sizeof(struct hid_collection) *
 140                         parser->device->collection_size);
 141                 memset(collection + parser->device->collection_size, 0,
 142                         sizeof(struct hid_collection) *
 143                         parser->device->collection_size);
 144                 kfree(parser->device->collection);
 145                 parser->device->collection = collection;
 146                 parser->device->collection_size *= 2;
 147         }
 148
 149         parser->collection_stack[parser->collection_stack_ptr++] =
 150                 parser->device->maxcollection;
 151
 152         collection = parser->device->collection +
 153                 parser->device->maxcollection++;
 154         collection->type = type;
 155         collection->usage = usage;
 156         collection->level = parser->collection_stack_ptr - 1;
 157
 158         if (type == HID_COLLECTION_APPLICATION)
 159                 parser->device->maxapplication++;
 160
 161         return 0;
 162 }
 163
 164 /*
 165  * Close a collection.
 166  */
 167
 168 static int close_collection(struct hid_parser *parser)
 169 {
 170         if (!parser->collection_stack_ptr) {
 171                 dbg("collection stack underflow");
 172                 return -1;
 173         }
 174         parser->collection_stack_ptr--;
 175         return 0;
 176 }
 177
 178 /*
 179  * Climb up the stack, search for the specified collection type
 180  * and return the usage.
 181  */
 182
 183 static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
 184 {
 185         int n;
 186         for (n = parser->collection_stack_ptr - 1; n >= 0; n--)
 187                 if (parser->device->collection[parser->collection_stack[n]].type == type)
 188                         return parser->device->collection[parser->collection_stack[n]].usage;
 189         return 0; /* we know nothing about this usage type */
 190 }
 191
 192 /*
 193  * Add a usage to the temporary parser table.
 194  */
 195
 196 static int hid_add_usage(struct hid_parser *parser, unsigned usage)
 197 {
 198         if (parser->local.usage_index >= HID_MAX_USAGES) {
 199                 dbg("usage index exceeded");
 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
 214 static 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         if (!(report = hid_register_report(parser->device, report_type, parser->global.report_id))) {
 223                 dbg("hid_register_report failed");
 224                 return -1;
 225         }
 226
 227         if (parser->global.logical_maximum < parser->global.logical_minimum) {
 228                 dbg("logical range invalid %d %d", parser->global.logical_minimum, parser->global.logical_maximum);
 229                 return -1;
 230         }
 231
 232         offset = report->size;
 233         report->size += parser->global.report_size * parser->global.report_count;
 234
 235         if (!parser->local.usage_index) /* Ignore padding fields */
 236                 return 0;
 237
 238         usages = max_t(int, parser->local.usage_index, parser->global.report_count);
 239
 240         if ((field = hid_register_field(report, usages, parser->global.report_count)) == NULL)
 241                 return 0;
 242
 243         field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
 244         field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
 245         field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 246
 247         for (i = 0; i < usages; i++) {
 248                 int j = i;
 249                 /* Duplicate the last usage we parsed if we have excess values */
 250                 if (i >= parser->local.usage_index)
 251                         j = parser->local.usage_index - 1;
 252                 field->usage[i].hid = parser->local.usage[j];
 253                 field->usage[i].collection_index =
 254                         parser->local.collection_index[j];
 255         }
 256
 257         field->maxusage = usages;
 258         field->flags = flags;
 259         field->report_offset = offset;
 260         field->report_type = report_type;
 261         field->report_size = parser->global.report_size;
 262         field->report_count = parser->global.report_count;
 263         field->logical_minimum = parser->global.logical_minimum;
 264         field->logical_maximum = parser->global.logical_maximum;
 265         field->physical_minimum = parser->global.physical_minimum;
 266         field->physical_maximum = parser->global.physical_maximum;
 267         field->unit_exponent = parser->global.unit_exponent;
 268         field->unit = parser->global.unit;
 269
 270         return 0;
 271 }
 272
 273 /*
 274  * Read data value from item.
 275  */
 276
 277 static __inline__ __u32 item_udata(struct hid_item *item)
 278 {
 279         switch (item->size) {
 280                 case 1: return item->data.u8;
 281                 case 2: return item->data.u16;
 282                 case 4: return item->data.u32;
 283         }
 284         return 0;
 285 }
 286
 287 static __inline__ __s32 item_sdata(struct hid_item *item)
 288 {
 289         switch (item->size) {
 290                 case 1: return item->data.s8;
 291                 case 2: return item->data.s16;
 292                 case 4: return item->data.s32;
 293         }
 294         return 0;
 295 }
 296
 297 /*
 298  * Process a global item.
 299  */
 300
 301 static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
 302 {
 303         switch (item->tag) {
 304
 305                 case HID_GLOBAL_ITEM_TAG_PUSH:
 306
 307                         if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
 308                                 dbg("global enviroment stack overflow");
 309                                 return -1;
 310                         }
 311
 312                         memcpy(parser->global_stack + parser->global_stack_ptr++,
 313                                 &parser->global, sizeof(struct hid_global));
 314                         return 0;
 315
 316                 case HID_GLOBAL_ITEM_TAG_POP:
 317
 318                         if (!parser->global_stack_ptr) {
 319                                 dbg("global enviroment stack underflow");
 320                                 return -1;
 321                         }
 322
 323                         memcpy(&parser->global, parser->global_stack + --parser->global_stack_ptr,
 324                                 sizeof(struct hid_global));
 325                         return 0;
 326
 327                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 328                         parser->global.usage_page = item_udata(item);
 329                         return 0;
 330
 331                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 332                         parser->global.logical_minimum = item_sdata(item);
 333                         return 0;
 334
 335                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 336                         if (parser->global.logical_minimum < 0)
 337                                 parser->global.logical_maximum = item_sdata(item);
 338                         else
 339                                 parser->global.logical_maximum = item_udata(item);
 340                         return 0;
 341
 342                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 343                         parser->global.physical_minimum = item_sdata(item);
 344                         return 0;
 345
 346                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 347                         if (parser->global.physical_minimum < 0)
 348                                 parser->global.physical_maximum = item_sdata(item);
 349                         else
 350                                 parser->global.physical_maximum = item_udata(item);
 351                         return 0;
 352
 353                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 354                         parser->global.unit_exponent = item_sdata(item);
 355                         return 0;
 356
 357                 case HID_GLOBAL_ITEM_TAG_UNIT:
 358                         parser->global.unit = item_udata(item);
 359                         return 0;
 360
 361                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 362                         if ((parser->global.report_size = item_udata(item)) > 32) {
 363                                 dbg("invalid report_size %d", parser->global.report_size);
 364                                 return -1;
 365                         }
 366                         return 0;
 367
 368                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 369                         if ((parser->global.report_count = item_udata(item)) > HID_MAX_USAGES) {
 370                                 dbg("invalid report_count %d", parser->global.report_count);
 371                                 return -1;
 372                         }
 373                         return 0;
 374
 375                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 376                         if ((parser->global.report_id = item_udata(item)) == 0) {
 377                                 dbg("report_id 0 is invalid");
 378                                 return -1;
 379                         }
 380                         return 0;
 381
 382                 default:
 383                         dbg("unknown global tag 0x%x", item->tag);
 384                         return -1;
 385         }
 386 }
 387
 388 /*
 389  * Process a local item.
 390  */
 391
 392 static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
 393 {
 394         __u32 data;
 395         unsigned n;
 396
 397         if (item->size == 0) {
 398                 dbg("item data expected for local item");
 399                 return -1;
 400         }
 401
 402         data = item_udata(item);
 403
 404         switch (item->tag) {
 405
 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("nested delimiters");
 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("bogus close delimiter");
 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("alternative usage ignored");
 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("alternative usage ignored");
 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("alternative usage ignored");
 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_add_usage failed\n");
 468                                         return -1;
 469                                 }
 470                         return 0;
 471
 472                 default:
 473
 474                         dbg("unknown local item tag 0x%x", item->tag);
 475                         return 0;
 476         }
 477         return 0;
 478 }
 479
 480 /*
 481  * Process a main item.
 482  */
 483
 484 static 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("unknown main item tag 0x%x", 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
 521 static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
 522 {
 523         dbg("reserved item type, tag 0x%x", 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
 533 static 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
 546 static void hid_free_device(struct hid_device *device)
 547 {
 548         unsigned i,j;
 549
 550         hid_ff_exit(device);
 551
 552         for (i = 0; i < HID_REPORT_TYPES; i++) {
 553                 struct hid_report_enum *report_enum = device->report_enum + i;
 554
 555                 for (j = 0; j < 256; j++) {
 556                         struct hid_report *report = report_enum->report_id_hash[j];
 557                         if (report)
 558                                 hid_free_report(report);
 559                 }
 560         }
 561
 562         kfree(device->rdesc);
 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
 571 static 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
 606                 case 0:
 607                         return start;
 608
 609                 case 1:
 610                         if ((end - start) < 1)
 611                                 return NULL;
 612                         item->data.u8 = *start++;
 613                         return start;
 614
 615                 case 2:
 616                         if ((end - start) < 2)
 617                                 return NULL;
 618                         item->data.u16 = le16_to_cpu(get_unaligned((__le16*)start));
 619                         start = (__u8 *)((__le16 *)start + 1);
 620                         return start;
 621
 622                 case 3:
 623                         item->size++;
 624                         if ((end - start) < 4)
 625                                 return NULL;
 626                         item->data.u32 = le32_to_cpu(get_unaligned((__le32*)start));
 627                         start = (__u8 *)((__le32 *)start + 1);
 628                         return start;
 629         }
 630
 631         return NULL;
 632 }
 633
 634 /*
 635  * Parse a report description into a hid_device structure. Reports are
 636  * enumerated, fields are attached to these reports.
 637  */
 638
 639 static struct hid_device *hid_parse_report(__u8 *start, unsigned size)
 640 {
 641         struct hid_device *device;
 642         struct hid_parser *parser;
 643         struct hid_item item;
 644         __u8 *end;
 645         unsigned i;
 646         static int (*dispatch_type[])(struct hid_parser *parser,
 647                                       struct hid_item *item) = {
 648                 hid_parser_main,
 649                 hid_parser_global,
 650                 hid_parser_local,
 651                 hid_parser_reserved
 652         };
 653
 654         if (!(device = kmalloc(sizeof(struct hid_device), GFP_KERNEL)))
 655                 return NULL;
 656         memset(device, 0, sizeof(struct hid_device));
 657
 658         if (!(device->collection = kmalloc(sizeof(struct hid_collection) *
 659                                    HID_DEFAULT_NUM_COLLECTIONS, GFP_KERNEL))) {
 660                 kfree(device);
 661                 return NULL;
 662         }
 663         memset(device->collection, 0, sizeof(struct hid_collection) *
 664                 HID_DEFAULT_NUM_COLLECTIONS);
 665         device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
 666
 667         for (i = 0; i < HID_REPORT_TYPES; i++)
 668                 INIT_LIST_HEAD(&device->report_enum[i].report_list);
 669
 670         if (!(device->rdesc = (__u8 *)kmalloc(size, GFP_KERNEL))) {
 671                 kfree(device->collection);
 672                 kfree(device);
 673                 return NULL;
 674         }
 675         memcpy(device->rdesc, start, size);
 676         device->rsize = size;
 677
 678         if (!(parser = kmalloc(sizeof(struct hid_parser), GFP_KERNEL))) {
 679                 kfree(device->rdesc);
 680                 kfree(device->collection);
 681                 kfree(device);
 682                 return NULL;
 683         }
 684         memset(parser, 0, sizeof(struct hid_parser));
 685         parser->device = device;
 686
 687         end = start + size;
 688         while ((start = fetch_item(start, end, &item)) != NULL) {
 689
 690                 if (item.format != HID_ITEM_FORMAT_SHORT) {
 691                         dbg("unexpected long global item");
 692                         kfree(device->collection);
 693                         hid_free_device(device);
 694                         kfree(parser);
 695                         return NULL;
 696                 }
 697
 698                 if (dispatch_type[item.type](parser, &item)) {
 699                         dbg("item %u %u %u %u parsing failed\n",
 700                                 item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag);
 701                         kfree(device->collection);
 702                         hid_free_device(device);
 703                         kfree(parser);
 704                         return NULL;
 705                 }
 706
 707                 if (start == end) {
 708                         if (parser->collection_stack_ptr) {
 709                                 dbg("unbalanced collection at end of report description");
 710                                 kfree(device->collection);
 711                                 hid_free_device(device);
 712                                 kfree(parser);
 713                                 return NULL;
 714                         }
 715                         if (parser->local.delimiter_depth) {
 716                                 dbg("unbalanced delimiter at end of report description");
 717                                 kfree(device->collection);
 718                                 hid_free_device(device);
 719                                 kfree(parser);
 720                                 return NULL;
 721                         }
 722                         kfree(parser);
 723                         return device;
 724                 }
 725         }
 726
 727         dbg("item fetching failed at offset %d\n", (int)(end - start));
 728         kfree(device->collection);
 729         hid_free_device(device);
 730         kfree(parser);
 731         return NULL;
 732 }
 733
 734 /*
 735  * Convert a signed n-bit integer to signed 32-bit integer. Common
 736  * cases are done through the compiler, the screwed things has to be
 737  * done by hand.
 738  */
 739
 740 static __inline__ __s32 snto32(__u32 value, unsigned n)
 741 {
 742         switch (n) {
 743                 case 8:  return ((__s8)value);
 744                 case 16: return ((__s16)value);
 745                 case 32: return ((__s32)value);
 746         }
 747         return value & (1 << (n - 1)) ? value | (-1 << n) : value;
 748 }
 749
 750 /*
 751  * Convert a signed 32-bit integer to a signed n-bit integer.
 752  */
 753
 754 static __inline__ __u32 s32ton(__s32 value, unsigned n)
 755 {
 756         __s32 a = value >> (n - 1);
 757         if (a && a != -1)
 758                 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
 759         return value & ((1 << n) - 1);
 760 }
 761
 762 /*
 763  * Extract/implement a data field from/to a report.
 764  */
 765
 766 static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n)
 767 {
 768         report += (offset >> 5) << 2; offset &= 31;
 769         return (le64_to_cpu(get_unaligned((__le64*)report)) >> offset) & ((1ULL << n) - 1);
 770 }
 771
 772 static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value)
 773 {
 774         report += (offset >> 5) << 2; offset &= 31;
 775         put_unaligned((get_unaligned((__le64*)report)
 776                 & cpu_to_le64(~((((__u64) 1 << n) - 1) << offset)))
 777                 | cpu_to_le64((__u64)value << offset), (__le64*)report);
 778 }
 779
 780 /*
 781  * Search an array for a value.
 782  */
 783
 784 static __inline__ int search(__s32 *array, __s32 value, unsigned n)
 785 {
 786         while (n--) {
 787                 if (*array++ == value)
 788                         return 0;
 789         }
 790         return -1;
 791 }
 792
 793 static void hid_process_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value, int interrupt, struct pt_regs *regs)
 794 {
 795         hid_dump_input(usage, value);
 796         if (hid->claimed & HID_CLAIMED_INPUT)
 797                 hidinput_hid_event(hid, field, usage, value, regs);
 798         if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt)
 799                 hiddev_hid_event(hid, field, usage, value, regs);
 800 }
 801
 802 /*
 803  * Analyse a received field, and fetch the data from it. The field
 804  * content is stored for next report processing (we do differential
 805  * reporting to the layer).
 806  */
 807
 808 static void hid_input_field(struct hid_device *hid, struct hid_field *field, __u8 *data, int interrupt, struct pt_regs *regs)
 809 {
 810         unsigned n;
 811         unsigned count = field->report_count;
 812         unsigned offset = field->report_offset;
 813         unsigned size = field->report_size;
 814         __s32 min = field->logical_minimum;
 815         __s32 max = field->logical_maximum;
 816         __s32 *value;
 817
 818         if (!(value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC)))
 819                 return;
 820
 821         for (n = 0; n < count; n++) {
 822
 823                         value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) :
 824                                                     extract(data, offset + n * size, size);
 825
 826                         if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */
 827                             && value[n] >= min && value[n] <= max
 828                             && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
 829                                 goto exit;
 830         }
 831
 832         for (n = 0; n < count; n++) {
 833
 834                 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
 835                         hid_process_event(hid, field, &field->usage[n], value[n], interrupt, regs);
 836                         continue;
 837                 }
 838
 839                 if (field->value[n] >= min && field->value[n] <= max
 840                         && field->usage[field->value[n] - min].hid
 841                         && search(value, field->value[n], count))
 842                                 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt, regs);
 843
 844                 if (value[n] >= min && value[n] <= max
 845                         && field->usage[value[n] - min].hid
 846                         && search(field->value, value[n], count))
 847                                 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt, regs);
 848         }
 849
 850         memcpy(field->value, value, count * sizeof(__s32));
 851 exit:
 852         kfree(value);
 853 }
 854
 855 static int hid_input_report(int type, struct urb *urb, int interrupt, struct pt_regs *regs)
 856 {
 857         struct hid_device *hid = urb->context;
 858         struct hid_report_enum *report_enum = hid->report_enum + type;
 859         u8 *data = urb->transfer_buffer;
 860         int len = urb->actual_length;
 861         struct hid_report *report;
 862         int n, size;
 863
 864         if (!len) {
 865                 dbg("empty report");
 866                 return -1;
 867         }
 868
 869 #ifdef DEBUG_DATA
 870         printk(KERN_DEBUG __FILE__ ": report (size %u) (%snumbered)\n", len, report_enum->numbered ? "" : "un");
 871 #endif
 872
 873         n = 0;                          /* Normally report number is 0 */
 874         if (report_enum->numbered) {    /* Device uses numbered reports, data[0] is report number */
 875                 n = *data++;
 876                 len--;
 877         }
 878
 879 #ifdef DEBUG_DATA
 880         {
 881                 int i;
 882                 printk(KERN_DEBUG __FILE__ ": report %d (size %u) = ", n, len);
 883                 for (i = 0; i < len; i++)
 884                         printk(" %02x", data[i]);
 885                 printk("\n");
 886         }
 887 #endif
 888
 889         if (!(report = report_enum->report_id_hash[n])) {
 890                 dbg("undefined report_id %d received", n);
 891                 return -1;
 892         }
 893
 894         size = ((report->size - 1) >> 3) + 1;
 895
 896         if (len < size)
 897                 dbg("report %d is too short, (%d < %d)", report->id, len, size);
 898
 899         if (hid->claimed & HID_CLAIMED_HIDDEV)
 900                 hiddev_report_event(hid, report);
 901
 902         for (n = 0; n < report->maxfield; n++)
 903                 hid_input_field(hid, report->field[n], data, interrupt, regs);
 904
 905         if (hid->claimed & HID_CLAIMED_INPUT)
 906                 hidinput_report_event(hid, report);
 907
 908         return 0;
 909 }
 910
 911 /*
 912  * Input interrupt completion handler.
 913  */
 914
 915 static void hid_irq_in(struct urb *urb, struct pt_regs *regs)
 916 {
 917         struct hid_device       *hid = urb->context;
 918         int                     status;
 919
 920         switch (urb->status) {
 921                 case 0:                 /* success */
 922                         hid_input_report(HID_INPUT_REPORT, urb, 1, regs);
 923                         break;
 924                 case -ECONNRESET:       /* unlink */
 925                 case -ENOENT:
 926                 case -EPERM:
 927                 case -ESHUTDOWN:        /* unplug */
 928                 case -EILSEQ:           /* unplug timeout on uhci */
 929                         return;
 930                 case -ETIMEDOUT:        /* NAK */
 931                         break;
 932                 default:                /* error */
 933                         warn("input irq status %d received", urb->status);
 934         }
 935
 936         status = usb_submit_urb(urb, SLAB_ATOMIC);
 937         if (status)
 938                 err("can't resubmit intr, %s-%s/input%d, status %d",
 939                                 hid->dev->bus->bus_name, hid->dev->devpath,
 940                                 hid->ifnum, status);
 941 }
 942
 943 /*
 944  * Output the field into the report.
 945  */
 946
 947 static void hid_output_field(struct hid_field *field, __u8 *data)
 948 {
 949         unsigned count = field->report_count;
 950         unsigned offset = field->report_offset;
 951         unsigned size = field->report_size;
 952         unsigned n;
 953
 954         for (n = 0; n < count; n++) {
 955                 if (field->logical_minimum < 0) /* signed values */
 956                         implement(data, offset + n * size, size, s32ton(field->value[n], size));
 957                 else                            /* unsigned values */
 958                         implement(data, offset + n * size, size, field->value[n]);
 959         }
 960 }
 961
 962 /*
 963  * Create a report.
 964  */
 965
 966 static void hid_output_report(struct hid_report *report, __u8 *data)
 967 {
 968         unsigned n;
 969
 970         if (report->id > 0)
 971                 *data++ = report->id;
 972
 973         for (n = 0; n < report->maxfield; n++)
 974                 hid_output_field(report->field[n], data);
 975 }
 976
 977 /*
 978  * Set a field value. The report this field belongs to has to be
 979  * created and transferred to the device, to set this value in the
 980  * device.
 981  */
 982
 983 int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
 984 {
 985         unsigned size = field->report_size;
 986
 987         hid_dump_input(field->usage + offset, value);
 988
 989         if (offset >= field->report_count) {
 990                 dbg("offset (%d) exceeds report_count (%d)", offset, field->report_count);
 991                 hid_dump_field(field, 8);
 992                 return -1;
 993         }
 994         if (field->logical_minimum < 0) {
 995                 if (value != snto32(s32ton(value, size), size)) {
 996                         dbg("value %d is out of range", value);
 997                         return -1;
 998                 }
 999         }
1000         field->value[offset] = value;
1001         return 0;
1002 }
1003
1004 /*
1005  * Find a report field with a specified HID usage.
1006  */
1007
1008 struct hid_field *hid_find_field_by_usage(struct hid_device *hid, __u32 wanted_usage, int type)
1009 {
1010         struct hid_report *report;
1011         int i;
1012
1013         list_for_each_entry(report, &hid->report_enum[type].report_list, list)
1014                 for (i = 0; i < report->maxfield; i++)
1015                         if (report->field[i]->logical == wanted_usage)
1016                                 return report->field[i];
1017         return NULL;
1018 }
1019
1020 static int hid_submit_out(struct hid_device *hid)
1021 {
1022         struct hid_report *report;
1023
1024         report = hid->out[hid->outtail];
1025
1026         hid_output_report(report, hid->outbuf);
1027         hid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
1028         hid->urbout->dev = hid->dev;
1029
1030         dbg("submitting out urb");
1031
1032         if (usb_submit_urb(hid->urbout, GFP_ATOMIC)) {
1033                 err("usb_submit_urb(out) failed");
1034                 return -1;
1035         }
1036
1037         return 0;
1038 }
1039
1040 static int hid_submit_ctrl(struct hid_device *hid)
1041 {
1042         struct hid_report *report;
1043         unsigned char dir;
1044         int len;
1045
1046         report = hid->ctrl[hid->ctrltail].report;
1047         dir = hid->ctrl[hid->ctrltail].dir;
1048
1049         len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
1050         if (dir == USB_DIR_OUT) {
1051                 hid_output_report(report, hid->ctrlbuf);
1052                 hid->urbctrl->pipe = usb_sndctrlpipe(hid->dev, 0);
1053                 hid->urbctrl->transfer_buffer_length = len;
1054         } else {
1055                 int maxpacket, padlen;
1056
1057                 hid->urbctrl->pipe = usb_rcvctrlpipe(hid->dev, 0);
1058                 maxpacket = usb_maxpacket(hid->dev, hid->urbctrl->pipe, 0);
1059                 if (maxpacket > 0) {
1060                         padlen = (len + maxpacket - 1) / maxpacket;
1061                         padlen *= maxpacket;
1062                         if (padlen > hid->bufsize)
1063                                 padlen = hid->bufsize;
1064                 } else
1065                         padlen = 0;
1066                 hid->urbctrl->transfer_buffer_length = padlen;
1067         }
1068         hid->urbctrl->dev = hid->dev;
1069
1070         hid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
1071         hid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
1072         hid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
1073         hid->cr->wIndex = cpu_to_le16(hid->ifnum);
1074         hid->cr->wLength = cpu_to_le16(len);
1075
1076         dbg("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u",
1077                 hid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
1078                 hid->cr->wValue, hid->cr->wIndex, hid->cr->wLength);
1079
1080         if (usb_submit_urb(hid->urbctrl, GFP_ATOMIC)) {
1081                 err("usb_submit_urb(ctrl) failed");
1082                 return -1;
1083         }
1084
1085         return 0;
1086 }
1087
1088 /*
1089  * Output interrupt completion handler.
1090  */
1091
1092 static void hid_irq_out(struct urb *urb, struct pt_regs *regs)
1093 {
1094         struct hid_device *hid = urb->context;
1095         unsigned long flags;
1096         int unplug = 0;
1097
1098         switch (urb->status) {
1099                 case 0:                 /* success */
1100                         break;
1101                 case -ESHUTDOWN:        /* unplug */
1102                 case -EILSEQ:           /* unplug timeout on uhci */
1103                         unplug = 1;
1104                 case -ECONNRESET:       /* unlink */
1105                 case -ENOENT:
1106                         break;
1107                 default:                /* error */
1108                         warn("output irq status %d received", urb->status);
1109         }
1110
1111         spin_lock_irqsave(&hid->outlock, flags);
1112
1113         if (unplug)
1114                 hid->outtail = hid->outhead;
1115         else
1116                 hid->outtail = (hid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
1117
1118         if (hid->outhead != hid->outtail) {
1119                 if (hid_submit_out(hid)) {
1120                         clear_bit(HID_OUT_RUNNING, &hid->iofl);;
1121                         wake_up(&hid->wait);
1122                 }
1123                 spin_unlock_irqrestore(&hid->outlock, flags);
1124                 return;
1125         }
1126
1127         clear_bit(HID_OUT_RUNNING, &hid->iofl);
1128         spin_unlock_irqrestore(&hid->outlock, flags);
1129         wake_up(&hid->wait);
1130 }
1131
1132 /*
1133  * Control pipe completion handler.
1134  */
1135
1136 static void hid_ctrl(struct urb *urb, struct pt_regs *regs)
1137 {
1138         struct hid_device *hid = urb->context;
1139         unsigned long flags;
1140         int unplug = 0;
1141
1142         spin_lock_irqsave(&hid->ctrllock, flags);
1143
1144         switch (urb->status) {
1145                 case 0:                 /* success */
1146                         if (hid->ctrl[hid->ctrltail].dir == USB_DIR_IN)
1147                                 hid_input_report(hid->ctrl[hid->ctrltail].report->type, urb, 0, regs);
1148                         break;
1149                 case -ESHUTDOWN:        /* unplug */
1150                 case -EILSEQ:           /* unplug timectrl on uhci */
1151                         unplug = 1;
1152                 case -ECONNRESET:       /* unlink */
1153                 case -ENOENT:
1154                 case -EPIPE:            /* report not available */
1155                         break;
1156                 default:                /* error */
1157                         warn("ctrl urb status %d received", urb->status);
1158         }
1159
1160         if (unplug)
1161                 hid->ctrltail = hid->ctrlhead;
1162         else
1163                 hid->ctrltail = (hid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
1164
1165         if (hid->ctrlhead != hid->ctrltail) {
1166                 if (hid_submit_ctrl(hid)) {
1167                         clear_bit(HID_CTRL_RUNNING, &hid->iofl);
1168                         wake_up(&hid->wait);
1169                 }
1170                 spin_unlock_irqrestore(&hid->ctrllock, flags);
1171                 return;
1172         }
1173
1174         clear_bit(HID_CTRL_RUNNING, &hid->iofl);
1175         spin_unlock_irqrestore(&hid->ctrllock, flags);
1176         wake_up(&hid->wait);
1177 }
1178
1179 void hid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
1180 {
1181         int head;
1182         unsigned long flags;
1183
1184         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
1185                 return;
1186
1187         if (hid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
1188
1189                 spin_lock_irqsave(&hid->outlock, flags);
1190
1191                 if ((head = (hid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == hid->outtail) {
1192                         spin_unlock_irqrestore(&hid->outlock, flags);
1193                         warn("output queue full");
1194                         return;
1195                 }
1196
1197                 hid->out[hid->outhead] = report;
1198                 hid->outhead = head;
1199
1200                 if (!test_and_set_bit(HID_OUT_RUNNING, &hid->iofl))
1201                         if (hid_submit_out(hid))
1202                                 clear_bit(HID_OUT_RUNNING, &hid->iofl);
1203
1204                 spin_unlock_irqrestore(&hid->outlock, flags);
1205                 return;
1206         }
1207
1208         spin_lock_irqsave(&hid->ctrllock, flags);
1209
1210         if ((head = (hid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == hid->ctrltail) {
1211                 spin_unlock_irqrestore(&hid->ctrllock, flags);
1212                 warn("control queue full");
1213                 return;
1214         }
1215
1216         hid->ctrl[hid->ctrlhead].report = report;
1217         hid->ctrl[hid->ctrlhead].dir = dir;
1218         hid->ctrlhead = head;
1219
1220         if (!test_and_set_bit(HID_CTRL_RUNNING, &hid->iofl))
1221                 if (hid_submit_ctrl(hid))
1222                         clear_bit(HID_CTRL_RUNNING, &hid->iofl);
1223
1224         spin_unlock_irqrestore(&hid->ctrllock, flags);
1225 }
1226
1227 int hid_wait_io(struct hid_device *hid)
1228 {
1229         if (!wait_event_timeout(hid->wait, (!test_bit(HID_CTRL_RUNNING, &hid->iofl) &&
1230                                         !test_bit(HID_OUT_RUNNING, &hid->iofl)),
1231                                         10*HZ)) {
1232                 dbg("timeout waiting for ctrl or out queue to clear");
1233                 return -1;
1234         }
1235
1236         return 0;
1237 }
1238
1239 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
1240 {
1241         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1242                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
1243                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
1244 }
1245
1246 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
1247                 unsigned char type, void *buf, int size)
1248 {
1249         int result, retries = 4;
1250
1251         memset(buf,0,size);     // Make sure we parse really received data
1252
1253         do {
1254                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1255                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
1256                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
1257                 retries--;
1258         } while (result < size && retries);
1259         return result;
1260 }
1261
1262 int hid_open(struct hid_device *hid)
1263 {
1264         if (hid->open++)
1265                 return 0;
1266
1267         hid->urbin->dev = hid->dev;
1268
1269         if (usb_submit_urb(hid->urbin, GFP_KERNEL))
1270                 return -EIO;
1271
1272         return 0;
1273 }
1274
1275 void hid_close(struct hid_device *hid)
1276 {
1277         if (!--hid->open)
1278                 usb_kill_urb(hid->urbin);
1279 }
1280
1281 /*
1282  * Initialize all reports
1283  */
1284
1285 void hid_init_reports(struct hid_device *hid)
1286 {
1287         struct hid_report *report;
1288         int err, ret;
1289
1290         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
1291                 hid_submit_report(hid, report, USB_DIR_IN);
1292
1293         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
1294                 hid_submit_report(hid, report, USB_DIR_IN);
1295
1296         err = 0;
1297         ret = hid_wait_io(hid);
1298         while (ret) {
1299                 err |= ret;
1300                 if (test_bit(HID_CTRL_RUNNING, &hid->iofl))
1301                         usb_kill_urb(hid->urbctrl);
1302                 if (test_bit(HID_OUT_RUNNING, &hid->iofl))
1303                         usb_kill_urb(hid->urbout);
1304                 ret = hid_wait_io(hid);
1305         }
1306
1307         if (err)
1308                 warn("timeout initializing reports\n");
1309 }
1310
1311 #define USB_VENDOR_ID_WACOM             0x056a
1312 #define USB_DEVICE_ID_WACOM_PENPARTNER  0x0000
1313 #define USB_DEVICE_ID_WACOM_GRAPHIRE    0x0010
1314 #define USB_DEVICE_ID_WACOM_INTUOS      0x0020
1315 #define USB_DEVICE_ID_WACOM_PL          0x0030
1316 #define USB_DEVICE_ID_WACOM_INTUOS2     0x0040
1317 #define USB_DEVICE_ID_WACOM_VOLITO      0x0060
1318 #define USB_DEVICE_ID_WACOM_PTU         0x0003
1319 #define USB_DEVICE_ID_WACOM_INTUOS3     0x00B0
1320 #define USB_DEVICE_ID_WACOM_CINTIQ      0x003F
1321
1322 #define USB_VENDOR_ID_ACECAD            0x0460
1323 #define USB_DEVICE_ID_ACECAD_FLAIR      0x0004
1324 #define USB_DEVICE_ID_ACECAD_302        0x0008
1325
1326 #define USB_VENDOR_ID_KBGEAR            0x084e
1327 #define USB_DEVICE_ID_KBGEAR_JAMSTUDIO  0x1001
1328
1329 #define USB_VENDOR_ID_AIPTEK            0x08ca
1330 #define USB_DEVICE_ID_AIPTEK_01         0x0001
1331 #define USB_DEVICE_ID_AIPTEK_10         0x0010
1332 #define USB_DEVICE_ID_AIPTEK_20         0x0020
1333 #define USB_DEVICE_ID_AIPTEK_21         0x0021
1334 #define USB_DEVICE_ID_AIPTEK_22         0x0022
1335 #define USB_DEVICE_ID_AIPTEK_23         0x0023
1336 #define USB_DEVICE_ID_AIPTEK_24         0x0024
1337
1338 #define USB_VENDOR_ID_GRIFFIN           0x077d
1339 #define USB_DEVICE_ID_POWERMATE         0x0410
1340 #define USB_DEVICE_ID_SOUNDKNOB         0x04AA
1341
1342 #define USB_VENDOR_ID_ATEN              0x0557
1343 #define USB_DEVICE_ID_ATEN_UC100KM      0x2004
1344 #define USB_DEVICE_ID_ATEN_CS124U       0x2202
1345 #define USB_DEVICE_ID_ATEN_2PORTKVM     0x2204
1346 #define USB_DEVICE_ID_ATEN_4PORTKVM     0x2205
1347 #define USB_DEVICE_ID_ATEN_4PORTKVMC    0x2208
1348
1349 #define USB_VENDOR_ID_TOPMAX            0x0663
1350 #define USB_DEVICE_ID_TOPMAX_COBRAPAD   0x0103
1351
1352 #define USB_VENDOR_ID_HAPP              0x078b
1353 #define USB_DEVICE_ID_UGCI_DRIVING      0x0010
1354 #define USB_DEVICE_ID_UGCI_FLYING       0x0020
1355 #define USB_DEVICE_ID_UGCI_FIGHTING     0x0030
1356
1357 #define USB_VENDOR_ID_MGE               0x0463
1358 #define USB_DEVICE_ID_MGE_UPS           0xffff
1359 #define USB_DEVICE_ID_MGE_UPS1          0x0001
1360
1361 #define USB_VENDOR_ID_ONTRAK            0x0a07
1362 #define USB_DEVICE_ID_ONTRAK_ADU100     0x0064
1363
1364 #define USB_VENDOR_ID_TANGTOP           0x0d3d
1365 #define USB_DEVICE_ID_TANGTOP_USBPS2    0x0001
1366
1367 #define USB_VENDOR_ID_ESSENTIAL_REALITY 0x0d7f
1368 #define USB_DEVICE_ID_ESSENTIAL_REALITY_P5 0x0100
1369
1370 #define USB_VENDOR_ID_A4TECH            0x09da
1371 #define USB_DEVICE_ID_A4TECH_WCP32PU    0x0006
1372
1373 #define USB_VENDOR_ID_AASHIMA           0x06D6
1374 #define USB_DEVICE_ID_AASHIMA_GAMEPAD   0x0025
1375
1376 #define USB_VENDOR_ID_CYPRESS           0x04b4
1377 #define USB_DEVICE_ID_CYPRESS_MOUSE     0x0001
1378 #define USB_DEVICE_ID_CYPRESS_HIDCOM    0x5500
1379
1380 #define USB_VENDOR_ID_BERKSHIRE         0x0c98
1381 #define USB_DEVICE_ID_BERKSHIRE_PCWD    0x1140
1382
1383 #define USB_VENDOR_ID_ALPS              0x0433
1384 #define USB_DEVICE_ID_IBM_GAMEPAD       0x1101
1385
1386 #define USB_VENDOR_ID_SAITEK            0x06a3
1387 #define USB_DEVICE_ID_SAITEK_RUMBLEPAD  0xff17
1388
1389 #define USB_VENDOR_ID_NEC               0x073e
1390 #define USB_DEVICE_ID_NEC_USB_GAME_PAD  0x0301
1391
1392 #define USB_VENDOR_ID_CHIC              0x05fe
1393 #define USB_DEVICE_ID_CHIC_GAMEPAD      0x0014
1394
1395 #define USB_VENDOR_ID_GLAB              0x06c2
1396 #define USB_DEVICE_ID_4_PHIDGETSERVO_30 0x0038
1397 #define USB_DEVICE_ID_1_PHIDGETSERVO_30 0x0039
1398 #define USB_DEVICE_ID_8_8_8_IF_KIT      0x0045
1399 #define USB_DEVICE_ID_0_0_4_IF_KIT      0x0040
1400 #define USB_DEVICE_ID_0_8_8_IF_KIT      0x0053
1401
1402 #define USB_VENDOR_ID_WISEGROUP         0x0925
1403 #define USB_DEVICE_ID_1_PHIDGETSERVO_20 0x8101
1404 #define USB_DEVICE_ID_4_PHIDGETSERVO_20 0x8104
1405
1406 #define USB_VENDOR_ID_CODEMERCS         0x07c0
1407 #define USB_DEVICE_ID_CODEMERCS_IOW40   0x1500
1408 #define USB_DEVICE_ID_CODEMERCS_IOW24   0x1501
1409 #define USB_DEVICE_ID_CODEMERCS_IOW48   0x1502
1410 #define USB_DEVICE_ID_CODEMERCS_IOW28   0x1503
1411
1412 #define USB_VENDOR_ID_DELORME           0x1163
1413 #define USB_DEVICE_ID_DELORME_EARTHMATE 0x0100
1414 #define USB_DEVICE_ID_DELORME_EM_LT20   0x0200
1415
1416 #define USB_VENDOR_ID_MCC               0x09db
1417 #define USB_DEVICE_ID_MCC_PMD1024LS     0x0076
1418 #define USB_DEVICE_ID_MCC_PMD1208LS     0x007a
1419
1420 #define USB_VENDOR_ID_CHICONY           0x04f2
1421 #define USB_DEVICE_ID_CHICONY_USBHUB_KB 0x0100
1422
1423 #define USB_VENDOR_ID_BTC               0x046e
1424 #define USB_DEVICE_ID_BTC_KEYBOARD      0x5303
1425
1426 #define USB_VENDOR_ID_VERNIER           0x08f7
1427 #define USB_DEVICE_ID_VERNIER_LABPRO    0x0001
1428 #define USB_DEVICE_ID_VERNIER_GOTEMP    0x0002
1429 #define USB_DEVICE_ID_VERNIER_SKIP      0x0003
1430 #define USB_DEVICE_ID_VERNIER_CYCLOPS   0x0004
1431
1432 #define USB_VENDOR_ID_LD                0x0f11
1433 #define USB_DEVICE_ID_CASSY             0x1000
1434 #define USB_DEVICE_ID_POCKETCASSY       0x1010
1435 #define USB_DEVICE_ID_MOBILECASSY       0x1020
1436 #define USB_DEVICE_ID_JWM               0x1080
1437 #define USB_DEVICE_ID_DMMP              0x1081
1438 #define USB_DEVICE_ID_UMIP              0x1090
1439 #define USB_DEVICE_ID_VIDEOCOM          0x1200
1440 #define USB_DEVICE_ID_COM3LAB           0x2000
1441 #define USB_DEVICE_ID_TELEPORT          0x2010
1442 #define USB_DEVICE_ID_NETWORKANALYSER   0x2020
1443 #define USB_DEVICE_ID_POWERCONTROL      0x2030
1444
1445 #define USB_VENDOR_ID_APPLE             0x05ac
1446 #define USB_DEVICE_ID_APPLE_POWERMOUSE  0x0304
1447
1448 /*
1449  * Alphabetically sorted blacklist by quirk type.
1450  */
1451
1452 static struct hid_blacklist {
1453         __u16 idVendor;
1454         __u16 idProduct;
1455         unsigned quirks;
1456 } hid_blacklist[] = {
1457
1458         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01, HID_QUIRK_IGNORE },
1459         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10, HID_QUIRK_IGNORE },
1460         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20, HID_QUIRK_IGNORE },
1461         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21, HID_QUIRK_IGNORE },
1462         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22, HID_QUIRK_IGNORE },
1463         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23, HID_QUIRK_IGNORE },
1464         { USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24, HID_QUIRK_IGNORE },
1465         { USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD, HID_QUIRK_IGNORE },
1466         { USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW40, HID_QUIRK_IGNORE },
1467         { USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW24, HID_QUIRK_IGNORE },
1468         { USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW48, HID_QUIRK_IGNORE },
1469         { USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW28, HID_QUIRK_IGNORE },
1470         { USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM, HID_QUIRK_IGNORE },
1471         { USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE, HID_QUIRK_IGNORE },
1472         { USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20, HID_QUIRK_IGNORE },
1473         { USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5, HID_QUIRK_IGNORE },
1474         { USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30, HID_QUIRK_IGNORE },
1475         { USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30, HID_QUIRK_IGNORE },
1476         { USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT, HID_QUIRK_IGNORE },
1477         { USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT, HID_QUIRK_IGNORE },
1478         { USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT, HID_QUIRK_IGNORE },
1479         { USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE, HID_QUIRK_IGNORE },
1480         { USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB, HID_QUIRK_IGNORE },
1481         { USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO, HID_QUIRK_IGNORE },
1482         { USB_VENDOR_ID_LD, USB_DEVICE_ID_CASSY, HID_QUIRK_IGNORE },
1483         { USB_VENDOR_ID_LD, USB_DEVICE_ID_POCKETCASSY, HID_QUIRK_IGNORE },
1484         { USB_VENDOR_ID_LD, USB_DEVICE_ID_MOBILECASSY, HID_QUIRK_IGNORE },
1485         { USB_VENDOR_ID_LD, USB_DEVICE_ID_JWM, HID_QUIRK_IGNORE },
1486         { USB_VENDOR_ID_LD, USB_DEVICE_ID_DMMP, HID_QUIRK_IGNORE },
1487         { USB_VENDOR_ID_LD, USB_DEVICE_ID_UMIP, HID_QUIRK_IGNORE },
1488         { USB_VENDOR_ID_LD, USB_DEVICE_ID_VIDEOCOM, HID_QUIRK_IGNORE },
1489         { USB_VENDOR_ID_LD, USB_DEVICE_ID_COM3LAB, HID_QUIRK_IGNORE },
1490         { USB_VENDOR_ID_LD, USB_DEVICE_ID_TELEPORT, HID_QUIRK_IGNORE },
1491         { USB_VENDOR_ID_LD, USB_DEVICE_ID_NETWORKANALYSER, HID_QUIRK_IGNORE },
1492         { USB_VENDOR_ID_LD, USB_DEVICE_ID_POWERCONTROL, HID_QUIRK_IGNORE },
1493         { USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS, HID_QUIRK_IGNORE },
1494         { USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS, HID_QUIRK_IGNORE },
1495         { USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS, HID_QUIRK_IGNORE },
1496         { USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1, HID_QUIRK_IGNORE },
1497         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100, HID_QUIRK_IGNORE },
1498         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100, HID_QUIRK_IGNORE },
1499         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200, HID_QUIRK_IGNORE },
1500         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300, HID_QUIRK_IGNORE },
1501         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400, HID_QUIRK_IGNORE },
1502         { USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500, HID_QUIRK_IGNORE },
1503         { USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO, HID_QUIRK_IGNORE },
1504         { USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP, HID_QUIRK_IGNORE },
1505         { USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP, HID_QUIRK_IGNORE },
1506         { USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS, HID_QUIRK_IGNORE },
1507         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PENPARTNER, HID_QUIRK_IGNORE },
1508         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE, HID_QUIRK_IGNORE },
1509         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 1, HID_QUIRK_IGNORE },
1510         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 2, HID_QUIRK_IGNORE },
1511         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 3, HID_QUIRK_IGNORE },
1512         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 4, HID_QUIRK_IGNORE },
1513         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS, HID_QUIRK_IGNORE },
1514         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 1, HID_QUIRK_IGNORE },
1515         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 2, HID_QUIRK_IGNORE },
1516         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 3, HID_QUIRK_IGNORE },
1517         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 4, HID_QUIRK_IGNORE },
1518         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL, HID_QUIRK_IGNORE },
1519         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 1, HID_QUIRK_IGNORE },
1520         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 2, HID_QUIRK_IGNORE },
1521         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 3, HID_QUIRK_IGNORE },
1522         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 4, HID_QUIRK_IGNORE },
1523         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 5, HID_QUIRK_IGNORE },
1524         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 1, HID_QUIRK_IGNORE },
1525         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 2, HID_QUIRK_IGNORE },
1526         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 3, HID_QUIRK_IGNORE },
1527         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 4, HID_QUIRK_IGNORE },
1528         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 5, HID_QUIRK_IGNORE },
1529         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 7, HID_QUIRK_IGNORE },
1530         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_VOLITO, HID_QUIRK_IGNORE },
1531         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PTU, HID_QUIRK_IGNORE },
1532         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS3, HID_QUIRK_IGNORE },
1533         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS3 + 1, HID_QUIRK_IGNORE },
1534         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS3 + 2, HID_QUIRK_IGNORE },
1535         { USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_CINTIQ, HID_QUIRK_IGNORE },
1536         { USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20, HID_QUIRK_IGNORE },
1537         { USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20, HID_QUIRK_IGNORE },
1538
1539         { USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR, HID_QUIRK_IGNORE },
1540         { USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302, HID_QUIRK_IGNORE },
1541
1542         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM, HID_QUIRK_NOGET },
1543         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS124U, HID_QUIRK_NOGET },
1544         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET },
1545         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET },
1546         { USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
1547         { USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_KEYBOARD, HID_QUIRK_NOGET},
1548         { USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_USBHUB_KB, HID_QUIRK_NOGET},
1549         { USB_VENDOR_ID_TANGTOP, USB_DEVICE_ID_TANGTOP_USBPS2, HID_QUIRK_NOGET },
1550
1551         { USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_POWERMOUSE, HID_QUIRK_2WHEEL_POWERMOUSE },
1552         { USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK_7 },
1553         { USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE, HID_QUIRK_2WHEEL_MOUSE_HACK_5 },
1554
1555         { USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_GAMEPAD, HID_QUIRK_BADPAD },
1556         { USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },
1557         { USB_VENDOR_ID_CHIC, USB_DEVICE_ID_CHIC_GAMEPAD, HID_QUIRK_BADPAD },
1558         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_DRIVING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
1559         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FLYING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
1560         { USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FIGHTING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
1561         { USB_VENDOR_ID_NEC, USB_DEVICE_ID_NEC_USB_GAME_PAD, HID_QUIRK_BADPAD },
1562         { USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RUMBLEPAD, HID_QUIRK_BADPAD },
1563         { USB_VENDOR_ID_TOPMAX, USB_DEVICE_ID_TOPMAX_COBRAPAD, HID_QUIRK_BADPAD },
1564
1565         { 0, 0 }
1566 };
1567
1568 /*
1569  * Traverse the supplied list of reports and find the longest
1570  */
1571 static void hid_find_max_report(struct hid_device *hid, unsigned int type, int *max)
1572 {
1573         struct hid_report *report;
1574         int size;
1575
1576         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
1577                 size = ((report->size - 1) >> 3) + 1;
1578                 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
1579                         size++;
1580                 if (*max < size)
1581                         *max = size;
1582         }
1583 }
1584
1585 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
1586 {
1587         if (!(hid->inbuf = usb_buffer_alloc(dev, hid->bufsize, SLAB_ATOMIC, &hid->inbuf_dma)))
1588                 return -1;
1589         if (!(hid->outbuf = usb_buffer_alloc(dev, hid->bufsize, SLAB_ATOMIC, &hid->outbuf_dma)))
1590                 return -1;
1591         if (!(hid->cr = usb_buffer_alloc(dev, sizeof(*(hid->cr)), SLAB_ATOMIC, &hid->cr_dma)))
1592                 return -1;
1593         if (!(hid->ctrlbuf = usb_buffer_alloc(dev, hid->bufsize, SLAB_ATOMIC, &hid->ctrlbuf_dma)))
1594                 return -1;
1595
1596         return 0;
1597 }
1598
1599 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
1600 {
1601         if (hid->inbuf)
1602                 usb_buffer_free(dev, hid->bufsize, hid->inbuf, hid->inbuf_dma);
1603         if (hid->outbuf)
1604                 usb_buffer_free(dev, hid->bufsize, hid->outbuf, hid->outbuf_dma);
1605         if (hid->cr)
1606                 usb_buffer_free(dev, sizeof(*(hid->cr)), hid->cr, hid->cr_dma);
1607         if (hid->ctrlbuf)
1608                 usb_buffer_free(dev, hid->bufsize, hid->ctrlbuf, hid->ctrlbuf_dma);
1609 }
1610
1611 static struct hid_device *usb_hid_configure(struct usb_interface *intf)
1612 {
1613         struct usb_host_interface *interface = intf->cur_altsetting;
1614         struct usb_device *dev = interface_to_usbdev (intf);
1615         struct hid_descriptor *hdesc;
1616         struct hid_device *hid;
1617         unsigned quirks = 0, rsize = 0;
1618         char *buf, *rdesc;
1619         int n, insize = 0;
1620
1621         for (n = 0; hid_blacklist[n].idVendor; n++)
1622                 if ((hid_blacklist[n].idVendor == le16_to_cpu(dev->descriptor.idVendor)) &&
1623                         (hid_blacklist[n].idProduct == le16_to_cpu(dev->descriptor.idProduct)))
1624                                 quirks = hid_blacklist[n].quirks;
1625
1626         if (quirks & HID_QUIRK_IGNORE)
1627                 return NULL;
1628
1629         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && ((!interface->desc.bNumEndpoints) ||
1630                 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
1631                         dbg("class descriptor not present\n");
1632                         return NULL;
1633         }
1634
1635         for (n = 0; n < hdesc->bNumDescriptors; n++)
1636                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
1637                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
1638
1639         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
1640                 dbg("weird size of report descriptor (%u)", rsize);
1641                 return NULL;
1642         }
1643
1644         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
1645                 dbg("couldn't allocate rdesc memory");
1646                 return NULL;
1647         }
1648
1649         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
1650
1651         if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
1652                 dbg("reading report descriptor failed");
1653                 kfree(rdesc);
1654                 return NULL;
1655         }
1656
1657 #ifdef DEBUG_DATA
1658         printk(KERN_DEBUG __FILE__ ": report descriptor (size %u, read %d) = ", rsize, n);
1659         for (n = 0; n < rsize; n++)
1660                 printk(" %02x", (unsigned char) rdesc[n]);
1661         printk("\n");
1662 #endif
1663
1664         if (!(hid = hid_parse_report(rdesc, n))) {
1665                 dbg("parsing report descriptor failed");
1666                 kfree(rdesc);
1667                 return NULL;
1668         }
1669
1670         kfree(rdesc);
1671         hid->quirks = quirks;
1672
1673         hid->bufsize = HID_MIN_BUFFER_SIZE;
1674         hid_find_max_report(hid, HID_INPUT_REPORT, &hid->bufsize);
1675         hid_find_max_report(hid, HID_OUTPUT_REPORT, &hid->bufsize);
1676         hid_find_max_report(hid, HID_FEATURE_REPORT, &hid->bufsize);
1677
1678         if (hid->bufsize > HID_MAX_BUFFER_SIZE)
1679                 hid->bufsize = HID_MAX_BUFFER_SIZE;
1680
1681         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
1682
1683         if (insize > HID_MAX_BUFFER_SIZE)
1684                 insize = HID_MAX_BUFFER_SIZE;
1685
1686         if (hid_alloc_buffers(dev, hid)) {
1687                 hid_free_buffers(dev, hid);
1688                 goto fail;
1689         }
1690
1691         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
1692
1693                 struct usb_endpoint_descriptor *endpoint;
1694                 int pipe;
1695                 int interval;
1696
1697                 endpoint = &interface->endpoint[n].desc;
1698                 if ((endpoint->bmAttributes & 3) != 3)          /* Not an interrupt endpoint */
1699                         continue;
1700
1701                 /* handle potential highspeed HID correctly */
1702                 interval = endpoint->bInterval;
1703                 if (dev->speed == USB_SPEED_HIGH)
1704                         interval = 1 << (interval - 1);
1705
1706                 /* Change the polling interval of mice. */
1707                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
1708                         interval = hid_mousepoll_interval;
1709
1710                 if (endpoint->bEndpointAddress & USB_DIR_IN) {
1711                         if (hid->urbin)
1712                                 continue;
1713                         if (!(hid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
1714                                 goto fail;
1715                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
1716                         usb_fill_int_urb(hid->urbin, dev, pipe, hid->inbuf, insize,
1717                                          hid_irq_in, hid, interval);
1718                         hid->urbin->transfer_dma = hid->inbuf_dma;
1719                         hid->urbin->transfer_flags |=(URB_NO_TRANSFER_DMA_MAP | URB_ASYNC_UNLINK);
1720                 } else {
1721                         if (hid->urbout)
1722                                 continue;
1723                         if (!(hid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
1724                                 goto fail;
1725                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
1726                         usb_fill_int_urb(hid->urbout, dev, pipe, hid->outbuf, 0,
1727                                          hid_irq_out, hid, interval);
1728                         hid->urbout->transfer_dma = hid->outbuf_dma;
1729                         hid->urbout->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_ASYNC_UNLINK);
1730                 }
1731         }
1732
1733         if (!hid->urbin) {
1734                 err("couldn't find an input interrupt endpoint");
1735                 goto fail;
1736         }
1737
1738         init_waitqueue_head(&hid->wait);
1739
1740         spin_lock_init(&hid->outlock);
1741         spin_lock_init(&hid->ctrllock);
1742
1743         hid->version = le16_to_cpu(hdesc->bcdHID);
1744         hid->country = hdesc->bCountryCode;
1745         hid->dev = dev;
1746         hid->intf = intf;
1747         hid->ifnum = interface->desc.bInterfaceNumber;
1748
1749         hid->name[0] = 0;
1750
1751         if (!(buf = kmalloc(64, GFP_KERNEL)))
1752                 goto fail;
1753
1754         if (dev->manufacturer) {
1755                 strcat(hid->name, dev->manufacturer);
1756                 if (dev->product)
1757                         snprintf(hid->name, 64, "%s %s", hid->name, dev->product);
1758         } else if (dev->product) {
1759                         snprintf(hid->name, 128, "%s", dev->product);
1760         } else
1761                 snprintf(hid->name, 128, "%04x:%04x",
1762                         le16_to_cpu(dev->descriptor.idVendor),
1763                         le16_to_cpu(dev->descriptor.idProduct));
1764
1765         usb_make_path(dev, buf, 64);
1766         snprintf(hid->phys, 64, "%s/input%d", buf,
1767                         intf->altsetting[0].desc.bInterfaceNumber);
1768
1769         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1770                 hid->uniq[0] = 0;
1771
1772         kfree(buf);
1773
1774         hid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
1775         if (!hid->urbctrl)
1776                 goto fail;
1777         usb_fill_control_urb(hid->urbctrl, dev, 0, (void *) hid->cr,
1778                              hid->ctrlbuf, 1, hid_ctrl, hid);
1779         hid->urbctrl->setup_dma = hid->cr_dma;
1780         hid->urbctrl->transfer_dma = hid->ctrlbuf_dma;
1781         hid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP | URB_ASYNC_UNLINK);
1782
1783         return hid;
1784
1785 fail:
1786
1787         if (hid->urbin)
1788                 usb_free_urb(hid->urbin);
1789         if (hid->urbout)
1790                 usb_free_urb(hid->urbout);
1791         if (hid->urbctrl)
1792                 usb_free_urb(hid->urbctrl);
1793         hid_free_buffers(dev, hid);
1794         hid_free_device(hid);
1795
1796         return NULL;
1797 }
1798
1799 static void hid_disconnect(struct usb_interface *intf)
1800 {
1801         struct hid_device *hid = usb_get_intfdata (intf);
1802
1803         if (!hid)
1804                 return;
1805
1806         usb_set_intfdata(intf, NULL);
1807         usb_kill_urb(hid->urbin);
1808         usb_kill_urb(hid->urbout);
1809         usb_kill_urb(hid->urbctrl);
1810
1811         if (hid->claimed & HID_CLAIMED_INPUT)
1812                 hidinput_disconnect(hid);
1813         if (hid->claimed & HID_CLAIMED_HIDDEV)
1814                 hiddev_disconnect(hid);
1815
1816         usb_free_urb(hid->urbin);
1817         usb_free_urb(hid->urbctrl);
1818         if (hid->urbout)
1819                 usb_free_urb(hid->urbout);
1820
1821         hid_free_buffers(hid->dev, hid);
1822         hid_free_device(hid);
1823 }
1824
1825 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
1826 {
1827         struct hid_device *hid;
1828         char path[64];
1829         int i;
1830         char *c;
1831
1832         dbg("HID probe called for ifnum %d",
1833                         intf->altsetting->desc.bInterfaceNumber);
1834
1835         if (!(hid = usb_hid_configure(intf)))
1836                 return -ENODEV;
1837
1838         hid_init_reports(hid);
1839         hid_dump_device(hid);
1840
1841         if (!hidinput_connect(hid))
1842                 hid->claimed |= HID_CLAIMED_INPUT;
1843         if (!hiddev_connect(hid))
1844                 hid->claimed |= HID_CLAIMED_HIDDEV;
1845
1846         usb_set_intfdata(intf, hid);
1847
1848         if (!hid->claimed) {
1849                 printk ("HID device not claimed by input or hiddev\n");
1850                 hid_disconnect(intf);
1851                 return -ENODEV;
1852         }
1853
1854         printk(KERN_INFO);
1855
1856         if (hid->claimed & HID_CLAIMED_INPUT)
1857                 printk("input");
1858         if (hid->claimed == (HID_CLAIMED_INPUT | HID_CLAIMED_HIDDEV))
1859                 printk(",");
1860         if (hid->claimed & HID_CLAIMED_HIDDEV)
1861                 printk("hiddev%d", hid->minor);
1862
1863         c = "Device";
1864         for (i = 0; i < hid->maxcollection; i++) {
1865                 if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
1866                     (hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1867                     (hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
1868                         c = hid_types[hid->collection[i].usage & 0xffff];
1869                         break;
1870                 }
1871         }
1872
1873         usb_make_path(interface_to_usbdev(intf), path, 63);
1874
1875         printk(": USB HID v%x.%02x %s [%s] on %s\n",
1876                 hid->version >> 8, hid->version & 0xff, c, hid->name, path);
1877
1878         return 0;
1879 }
1880
1881 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1882 {
1883         struct hid_device *hid = usb_get_intfdata (intf);
1884
1885         usb_kill_urb(hid->urbin);
1886         intf->dev.power.power_state = PMSG_SUSPEND;
1887         dev_dbg(&intf->dev, "suspend\n");
1888         return 0;
1889 }
1890
1891 static int hid_resume(struct usb_interface *intf)
1892 {
1893         struct hid_device *hid = usb_get_intfdata (intf);
1894         int status;
1895
1896         intf->dev.power.power_state = PMSG_ON;
1897         if (hid->open)
1898                 status = usb_submit_urb(hid->urbin, GFP_NOIO);
1899         else
1900                 status = 0;
1901         dev_dbg(&intf->dev, "resume status %d\n", status);
1902         return status;
1903 }
1904
1905 static struct usb_device_id hid_usb_ids [] = {
1906         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1907                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1908         { }                                             /* Terminating entry */
1909 };
1910
1911 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1912
1913 static struct usb_driver hid_driver = {
1914         .owner =        THIS_MODULE,
1915         .name =         "usbhid",
1916         .probe =        hid_probe,
1917         .disconnect =   hid_disconnect,
1918         .suspend =      hid_suspend,
1919         .resume =       hid_resume,
1920         .id_table =     hid_usb_ids,
1921 };
1922
1923 static int __init hid_init(void)
1924 {
1925         int retval;
1926         retval = hiddev_init();
1927         if (retval)
1928                 goto hiddev_init_fail;
1929         retval = usb_register(&hid_driver);
1930         if (retval)
1931                 goto usb_register_fail;
1932         info(DRIVER_VERSION ":" DRIVER_DESC);
1933
1934         return 0;
1935 usb_register_fail:
1936         hiddev_exit();
1937 hiddev_init_fail:
1938         return retval;
1939 }
1940
1941 static void __exit hid_exit(void)
1942 {
1943         usb_deregister(&hid_driver);
1944         hiddev_exit();
1945 }
1946
1947 module_init(hid_init);
1948 module_exit(hid_exit);
1949
1950 MODULE_AUTHOR(DRIVER_AUTHOR);
1951 MODULE_DESCRIPTION(DRIVER_DESC);
1952 MODULE_LICENSE(DRIVER_LICENSE);