hid-core.c revision 0f2213208f8da51bcb665309e3468f000489c04f
1/* 2 * HID support for Linux 3 * 4 * Copyright (c) 1999 Andreas Gal 5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 7 * Copyright (c) 2006-2007 Jiri Kosina 8 */ 9 10/* 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the Free 13 * Software Foundation; either version 2 of the License, or (at your option) 14 * any later version. 15 */ 16 17#include <linux/module.h> 18#include <linux/slab.h> 19#include <linux/init.h> 20#include <linux/kernel.h> 21#include <linux/list.h> 22#include <linux/mm.h> 23#include <linux/spinlock.h> 24#include <asm/unaligned.h> 25#include <asm/byteorder.h> 26#include <linux/input.h> 27#include <linux/wait.h> 28#include <linux/vmalloc.h> 29#include <linux/sched.h> 30 31#include <linux/hid.h> 32#include <linux/hiddev.h> 33#include <linux/hid-debug.h> 34#include <linux/hidraw.h> 35 36#include "hid-ids.h" 37 38/* 39 * Version Information 40 */ 41 42#define DRIVER_VERSION "v2.6" 43#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina" 44#define DRIVER_DESC "HID core driver" 45#define DRIVER_LICENSE "GPL" 46 47#ifdef CONFIG_HID_DEBUG 48int hid_debug = 0; 49module_param_named(debug, hid_debug, int, 0600); 50MODULE_PARM_DESC(debug, "HID debugging (0=off, 1=probing info, 2=continuous data dumping)"); 51EXPORT_SYMBOL_GPL(hid_debug); 52#endif 53 54/* 55 * Register a new report for a device. 56 */ 57 58static struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id) 59{ 60 struct hid_report_enum *report_enum = device->report_enum + type; 61 struct hid_report *report; 62 63 if (report_enum->report_id_hash[id]) 64 return report_enum->report_id_hash[id]; 65 66 if (!(report = kzalloc(sizeof(struct hid_report), GFP_KERNEL))) 67 return NULL; 68 69 if (id != 0) 70 report_enum->numbered = 1; 71 72 report->id = id; 73 report->type = type; 74 report->size = 0; 75 report->device = device; 76 report_enum->report_id_hash[id] = report; 77 78 list_add_tail(&report->list, &report_enum->report_list); 79 80 return report; 81} 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 if (!(field = kzalloc(sizeof(struct hid_field) + usages * sizeof(struct hid_usage) 97 + values * sizeof(unsigned), GFP_KERNEL))) return NULL; 98 99 field->index = report->maxfield++; 100 report->field[field->index] = field; 101 field->usage = (struct hid_usage *)(field + 1); 102 field->value = (s32 *)(field->usage + usages); 103 field->report = report; 104 105 return field; 106} 107 108/* 109 * Open a collection. The type/usage is pushed on the stack. 110 */ 111 112static int open_collection(struct hid_parser *parser, unsigned type) 113{ 114 struct hid_collection *collection; 115 unsigned usage; 116 117 usage = parser->local.usage[0]; 118 119 if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) { 120 dbg_hid("collection stack overflow\n"); 121 return -1; 122 } 123 124 if (parser->device->maxcollection == parser->device->collection_size) { 125 collection = kmalloc(sizeof(struct hid_collection) * 126 parser->device->collection_size * 2, GFP_KERNEL); 127 if (collection == NULL) { 128 dbg_hid("failed to reallocate collection array\n"); 129 return -1; 130 } 131 memcpy(collection, parser->device->collection, 132 sizeof(struct hid_collection) * 133 parser->device->collection_size); 134 memset(collection + parser->device->collection_size, 0, 135 sizeof(struct hid_collection) * 136 parser->device->collection_size); 137 kfree(parser->device->collection); 138 parser->device->collection = collection; 139 parser->device->collection_size *= 2; 140 } 141 142 parser->collection_stack[parser->collection_stack_ptr++] = 143 parser->device->maxcollection; 144 145 collection = parser->device->collection + 146 parser->device->maxcollection++; 147 collection->type = type; 148 collection->usage = usage; 149 collection->level = parser->collection_stack_ptr - 1; 150 151 if (type == HID_COLLECTION_APPLICATION) 152 parser->device->maxapplication++; 153 154 return 0; 155} 156 157/* 158 * Close a collection. 159 */ 160 161static int close_collection(struct hid_parser *parser) 162{ 163 if (!parser->collection_stack_ptr) { 164 dbg_hid("collection stack underflow\n"); 165 return -1; 166 } 167 parser->collection_stack_ptr--; 168 return 0; 169} 170 171/* 172 * Climb up the stack, search for the specified collection type 173 * and return the usage. 174 */ 175 176static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type) 177{ 178 int n; 179 for (n = parser->collection_stack_ptr - 1; n >= 0; n--) 180 if (parser->device->collection[parser->collection_stack[n]].type == type) 181 return parser->device->collection[parser->collection_stack[n]].usage; 182 return 0; /* we know nothing about this usage type */ 183} 184 185/* 186 * Add a usage to the temporary parser table. 187 */ 188 189static int hid_add_usage(struct hid_parser *parser, unsigned usage) 190{ 191 if (parser->local.usage_index >= HID_MAX_USAGES) { 192 dbg_hid("usage index exceeded\n"); 193 return -1; 194 } 195 parser->local.usage[parser->local.usage_index] = usage; 196 parser->local.collection_index[parser->local.usage_index] = 197 parser->collection_stack_ptr ? 198 parser->collection_stack[parser->collection_stack_ptr - 1] : 0; 199 parser->local.usage_index++; 200 return 0; 201} 202 203/* 204 * Register a new field for this report. 205 */ 206 207static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags) 208{ 209 struct hid_report *report; 210 struct hid_field *field; 211 int usages; 212 unsigned offset; 213 int i; 214 215 if (!(report = hid_register_report(parser->device, report_type, parser->global.report_id))) { 216 dbg_hid("hid_register_report failed\n"); 217 return -1; 218 } 219 220 if (parser->global.logical_maximum < parser->global.logical_minimum) { 221 dbg_hid("logical range invalid %d %d\n", parser->global.logical_minimum, parser->global.logical_maximum); 222 return -1; 223 } 224 225 offset = report->size; 226 report->size += parser->global.report_size * parser->global.report_count; 227 228 if (!parser->local.usage_index) /* Ignore padding fields */ 229 return 0; 230 231 usages = max_t(int, parser->local.usage_index, parser->global.report_count); 232 233 if ((field = hid_register_field(report, usages, parser->global.report_count)) == NULL) 234 return 0; 235 236 field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL); 237 field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL); 238 field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION); 239 240 for (i = 0; i < usages; i++) { 241 int j = i; 242 /* Duplicate the last usage we parsed if we have excess values */ 243 if (i >= parser->local.usage_index) 244 j = parser->local.usage_index - 1; 245 field->usage[i].hid = parser->local.usage[j]; 246 field->usage[i].collection_index = 247 parser->local.collection_index[j]; 248 } 249 250 field->maxusage = usages; 251 field->flags = flags; 252 field->report_offset = offset; 253 field->report_type = report_type; 254 field->report_size = parser->global.report_size; 255 field->report_count = parser->global.report_count; 256 field->logical_minimum = parser->global.logical_minimum; 257 field->logical_maximum = parser->global.logical_maximum; 258 field->physical_minimum = parser->global.physical_minimum; 259 field->physical_maximum = parser->global.physical_maximum; 260 field->unit_exponent = parser->global.unit_exponent; 261 field->unit = parser->global.unit; 262 263 return 0; 264} 265 266/* 267 * Read data value from item. 268 */ 269 270static u32 item_udata(struct hid_item *item) 271{ 272 switch (item->size) { 273 case 1: return item->data.u8; 274 case 2: return item->data.u16; 275 case 4: return item->data.u32; 276 } 277 return 0; 278} 279 280static s32 item_sdata(struct hid_item *item) 281{ 282 switch (item->size) { 283 case 1: return item->data.s8; 284 case 2: return item->data.s16; 285 case 4: return item->data.s32; 286 } 287 return 0; 288} 289 290/* 291 * Process a global item. 292 */ 293 294static int hid_parser_global(struct hid_parser *parser, struct hid_item *item) 295{ 296 switch (item->tag) { 297 case HID_GLOBAL_ITEM_TAG_PUSH: 298 299 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) { 300 dbg_hid("global enviroment stack overflow\n"); 301 return -1; 302 } 303 304 memcpy(parser->global_stack + parser->global_stack_ptr++, 305 &parser->global, sizeof(struct hid_global)); 306 return 0; 307 308 case HID_GLOBAL_ITEM_TAG_POP: 309 310 if (!parser->global_stack_ptr) { 311 dbg_hid("global enviroment stack underflow\n"); 312 return -1; 313 } 314 315 memcpy(&parser->global, parser->global_stack + 316 --parser->global_stack_ptr, sizeof(struct hid_global)); 317 return 0; 318 319 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE: 320 parser->global.usage_page = item_udata(item); 321 return 0; 322 323 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM: 324 parser->global.logical_minimum = item_sdata(item); 325 return 0; 326 327 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM: 328 if (parser->global.logical_minimum < 0) 329 parser->global.logical_maximum = item_sdata(item); 330 else 331 parser->global.logical_maximum = item_udata(item); 332 return 0; 333 334 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM: 335 parser->global.physical_minimum = item_sdata(item); 336 return 0; 337 338 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM: 339 if (parser->global.physical_minimum < 0) 340 parser->global.physical_maximum = item_sdata(item); 341 else 342 parser->global.physical_maximum = item_udata(item); 343 return 0; 344 345 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT: 346 parser->global.unit_exponent = item_sdata(item); 347 return 0; 348 349 case HID_GLOBAL_ITEM_TAG_UNIT: 350 parser->global.unit = item_udata(item); 351 return 0; 352 353 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE: 354 parser->global.report_size = item_udata(item); 355 if (parser->global.report_size > 32) { 356 dbg_hid("invalid report_size %d\n", 357 parser->global.report_size); 358 return -1; 359 } 360 return 0; 361 362 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT: 363 parser->global.report_count = item_udata(item); 364 if (parser->global.report_count > HID_MAX_USAGES) { 365 dbg_hid("invalid report_count %d\n", 366 parser->global.report_count); 367 return -1; 368 } 369 return 0; 370 371 case HID_GLOBAL_ITEM_TAG_REPORT_ID: 372 parser->global.report_id = item_udata(item); 373 if (parser->global.report_id == 0) { 374 dbg_hid("report_id 0 is invalid\n"); 375 return -1; 376 } 377 return 0; 378 379 default: 380 dbg_hid("unknown global tag 0x%x\n", item->tag); 381 return -1; 382 } 383} 384 385/* 386 * Process a local item. 387 */ 388 389static int hid_parser_local(struct hid_parser *parser, struct hid_item *item) 390{ 391 __u32 data; 392 unsigned n; 393 394 if (item->size == 0) { 395 dbg_hid("item data expected for local item\n"); 396 return -1; 397 } 398 399 data = item_udata(item); 400 401 switch (item->tag) { 402 case HID_LOCAL_ITEM_TAG_DELIMITER: 403 404 if (data) { 405 /* 406 * We treat items before the first delimiter 407 * as global to all usage sets (branch 0). 408 * In the moment we process only these global 409 * items and the first delimiter set. 410 */ 411 if (parser->local.delimiter_depth != 0) { 412 dbg_hid("nested delimiters\n"); 413 return -1; 414 } 415 parser->local.delimiter_depth++; 416 parser->local.delimiter_branch++; 417 } else { 418 if (parser->local.delimiter_depth < 1) { 419 dbg_hid("bogus close delimiter\n"); 420 return -1; 421 } 422 parser->local.delimiter_depth--; 423 } 424 return 1; 425 426 case HID_LOCAL_ITEM_TAG_USAGE: 427 428 if (parser->local.delimiter_branch > 1) { 429 dbg_hid("alternative usage ignored\n"); 430 return 0; 431 } 432 433 if (item->size <= 2) 434 data = (parser->global.usage_page << 16) + data; 435 436 return hid_add_usage(parser, data); 437 438 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM: 439 440 if (parser->local.delimiter_branch > 1) { 441 dbg_hid("alternative usage ignored\n"); 442 return 0; 443 } 444 445 if (item->size <= 2) 446 data = (parser->global.usage_page << 16) + data; 447 448 parser->local.usage_minimum = data; 449 return 0; 450 451 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM: 452 453 if (parser->local.delimiter_branch > 1) { 454 dbg_hid("alternative usage ignored\n"); 455 return 0; 456 } 457 458 if (item->size <= 2) 459 data = (parser->global.usage_page << 16) + data; 460 461 for (n = parser->local.usage_minimum; n <= data; n++) 462 if (hid_add_usage(parser, n)) { 463 dbg_hid("hid_add_usage failed\n"); 464 return -1; 465 } 466 return 0; 467 468 default: 469 470 dbg_hid("unknown local item tag 0x%x\n", item->tag); 471 return 0; 472 } 473 return 0; 474} 475 476/* 477 * Process a main item. 478 */ 479 480static int hid_parser_main(struct hid_parser *parser, struct hid_item *item) 481{ 482 __u32 data; 483 int ret; 484 485 data = item_udata(item); 486 487 switch (item->tag) { 488 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION: 489 ret = open_collection(parser, data & 0xff); 490 break; 491 case HID_MAIN_ITEM_TAG_END_COLLECTION: 492 ret = close_collection(parser); 493 break; 494 case HID_MAIN_ITEM_TAG_INPUT: 495 ret = hid_add_field(parser, HID_INPUT_REPORT, data); 496 break; 497 case HID_MAIN_ITEM_TAG_OUTPUT: 498 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data); 499 break; 500 case HID_MAIN_ITEM_TAG_FEATURE: 501 ret = hid_add_field(parser, HID_FEATURE_REPORT, data); 502 break; 503 default: 504 dbg_hid("unknown main item tag 0x%x\n", item->tag); 505 ret = 0; 506 } 507 508 memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */ 509 510 return ret; 511} 512 513/* 514 * Process a reserved item. 515 */ 516 517static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item) 518{ 519 dbg_hid("reserved item type, tag 0x%x\n", item->tag); 520 return 0; 521} 522 523/* 524 * Free a report and all registered fields. The field->usage and 525 * field->value table's are allocated behind the field, so we need 526 * only to free(field) itself. 527 */ 528 529static void hid_free_report(struct hid_report *report) 530{ 531 unsigned n; 532 533 for (n = 0; n < report->maxfield; n++) 534 kfree(report->field[n]); 535 kfree(report); 536} 537 538/* 539 * Free a device structure, all reports, and all fields. 540 */ 541 542static void hid_device_release(struct device *dev) 543{ 544 struct hid_device *device = container_of(dev, struct hid_device, dev); 545 unsigned i, j; 546 547 for (i = 0; i < HID_REPORT_TYPES; i++) { 548 struct hid_report_enum *report_enum = device->report_enum + i; 549 550 for (j = 0; j < 256; j++) { 551 struct hid_report *report = report_enum->report_id_hash[j]; 552 if (report) 553 hid_free_report(report); 554 } 555 } 556 557 kfree(device->rdesc); 558 kfree(device->collection); 559 kfree(device); 560} 561 562/* 563 * Fetch a report description item from the data stream. We support long 564 * items, though they are not used yet. 565 */ 566 567static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item) 568{ 569 u8 b; 570 571 if ((end - start) <= 0) 572 return NULL; 573 574 b = *start++; 575 576 item->type = (b >> 2) & 3; 577 item->tag = (b >> 4) & 15; 578 579 if (item->tag == HID_ITEM_TAG_LONG) { 580 581 item->format = HID_ITEM_FORMAT_LONG; 582 583 if ((end - start) < 2) 584 return NULL; 585 586 item->size = *start++; 587 item->tag = *start++; 588 589 if ((end - start) < item->size) 590 return NULL; 591 592 item->data.longdata = start; 593 start += item->size; 594 return start; 595 } 596 597 item->format = HID_ITEM_FORMAT_SHORT; 598 item->size = b & 3; 599 600 switch (item->size) { 601 case 0: 602 return start; 603 604 case 1: 605 if ((end - start) < 1) 606 return NULL; 607 item->data.u8 = *start++; 608 return start; 609 610 case 2: 611 if ((end - start) < 2) 612 return NULL; 613 item->data.u16 = get_unaligned_le16(start); 614 start = (__u8 *)((__le16 *)start + 1); 615 return start; 616 617 case 3: 618 item->size++; 619 if ((end - start) < 4) 620 return NULL; 621 item->data.u32 = get_unaligned_le32(start); 622 start = (__u8 *)((__le32 *)start + 1); 623 return start; 624 } 625 626 return NULL; 627} 628 629/** 630 * hid_parse_report - parse device report 631 * 632 * @device: hid device 633 * @start: report start 634 * @size: report size 635 * 636 * Parse a report description into a hid_device structure. Reports are 637 * enumerated, fields are attached to these reports. 638 * 0 returned on success, otherwise nonzero error value. 639 */ 640int hid_parse_report(struct hid_device *device, __u8 *start, 641 unsigned size) 642{ 643 struct hid_parser *parser; 644 struct hid_item item; 645 __u8 *end; 646 int ret; 647 static int (*dispatch_type[])(struct hid_parser *parser, 648 struct hid_item *item) = { 649 hid_parser_main, 650 hid_parser_global, 651 hid_parser_local, 652 hid_parser_reserved 653 }; 654 655 if (device->driver->report_fixup) 656 device->driver->report_fixup(device, start, size); 657 658 device->rdesc = kmalloc(size, GFP_KERNEL); 659 if (device->rdesc == NULL) 660 return -ENOMEM; 661 memcpy(device->rdesc, start, size); 662 device->rsize = size; 663 664 parser = vmalloc(sizeof(struct hid_parser)); 665 if (!parser) { 666 ret = -ENOMEM; 667 goto err; 668 } 669 670 memset(parser, 0, sizeof(struct hid_parser)); 671 parser->device = device; 672 673 end = start + size; 674 ret = -EINVAL; 675 while ((start = fetch_item(start, end, &item)) != NULL) { 676 677 if (item.format != HID_ITEM_FORMAT_SHORT) { 678 dbg_hid("unexpected long global item\n"); 679 goto err; 680 } 681 682 if (dispatch_type[item.type](parser, &item)) { 683 dbg_hid("item %u %u %u %u parsing failed\n", 684 item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag); 685 goto err; 686 } 687 688 if (start == end) { 689 if (parser->collection_stack_ptr) { 690 dbg_hid("unbalanced collection at end of report description\n"); 691 goto err; 692 } 693 if (parser->local.delimiter_depth) { 694 dbg_hid("unbalanced delimiter at end of report description\n"); 695 goto err; 696 } 697 vfree(parser); 698 return 0; 699 } 700 } 701 702 dbg_hid("item fetching failed at offset %d\n", (int)(end - start)); 703err: 704 vfree(parser); 705 return ret; 706} 707EXPORT_SYMBOL_GPL(hid_parse_report); 708 709/* 710 * Convert a signed n-bit integer to signed 32-bit integer. Common 711 * cases are done through the compiler, the screwed things has to be 712 * done by hand. 713 */ 714 715static s32 snto32(__u32 value, unsigned n) 716{ 717 switch (n) { 718 case 8: return ((__s8)value); 719 case 16: return ((__s16)value); 720 case 32: return ((__s32)value); 721 } 722 return value & (1 << (n - 1)) ? value | (-1 << n) : value; 723} 724 725/* 726 * Convert a signed 32-bit integer to a signed n-bit integer. 727 */ 728 729static u32 s32ton(__s32 value, unsigned n) 730{ 731 s32 a = value >> (n - 1); 732 if (a && a != -1) 733 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1; 734 return value & ((1 << n) - 1); 735} 736 737/* 738 * Extract/implement a data field from/to a little endian report (bit array). 739 * 740 * Code sort-of follows HID spec: 741 * http://www.usb.org/developers/devclass_docs/HID1_11.pdf 742 * 743 * While the USB HID spec allows unlimited length bit fields in "report 744 * descriptors", most devices never use more than 16 bits. 745 * One model of UPS is claimed to report "LINEV" as a 32-bit field. 746 * Search linux-kernel and linux-usb-devel archives for "hid-core extract". 747 */ 748 749static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n) 750{ 751 u64 x; 752 753 if (n > 32) 754 printk(KERN_WARNING "HID: extract() called with n (%d) > 32! (%s)\n", 755 n, current->comm); 756 757 report += offset >> 3; /* adjust byte index */ 758 offset &= 7; /* now only need bit offset into one byte */ 759 x = get_unaligned_le64(report); 760 x = (x >> offset) & ((1ULL << n) - 1); /* extract bit field */ 761 return (u32) x; 762} 763 764/* 765 * "implement" : set bits in a little endian bit stream. 766 * Same concepts as "extract" (see comments above). 767 * The data mangled in the bit stream remains in little endian 768 * order the whole time. It make more sense to talk about 769 * endianness of register values by considering a register 770 * a "cached" copy of the little endiad bit stream. 771 */ 772static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value) 773{ 774 u64 x; 775 u64 m = (1ULL << n) - 1; 776 777 if (n > 32) 778 printk(KERN_WARNING "HID: implement() called with n (%d) > 32! (%s)\n", 779 n, current->comm); 780 781 if (value > m) 782 printk(KERN_WARNING "HID: implement() called with too large value %d! (%s)\n", 783 value, current->comm); 784 WARN_ON(value > m); 785 value &= m; 786 787 report += offset >> 3; 788 offset &= 7; 789 790 x = get_unaligned_le64(report); 791 x &= ~(m << offset); 792 x |= ((u64)value) << offset; 793 put_unaligned_le64(x, report); 794} 795 796/* 797 * Search an array for a value. 798 */ 799 800static __inline__ int search(__s32 *array, __s32 value, unsigned n) 801{ 802 while (n--) { 803 if (*array++ == value) 804 return 0; 805 } 806 return -1; 807} 808 809/** 810 * hid_match_report - check if driver's raw_event should be called 811 * 812 * @hid: hid device 813 * @report_type: type to match against 814 * 815 * compare hid->driver->report_table->report_type to report->type 816 */ 817static int hid_match_report(struct hid_device *hid, struct hid_report *report) 818{ 819 const struct hid_report_id *id = hid->driver->report_table; 820 821 if (!id) /* NULL means all */ 822 return 1; 823 824 for (; id->report_type != HID_TERMINATOR; id++) 825 if (id->report_type == HID_ANY_ID || 826 id->report_type == report->type) 827 return 1; 828 return 0; 829} 830 831/** 832 * hid_match_usage - check if driver's event should be called 833 * 834 * @hid: hid device 835 * @usage: usage to match against 836 * 837 * compare hid->driver->usage_table->usage_{type,code} to 838 * usage->usage_{type,code} 839 */ 840static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage) 841{ 842 const struct hid_usage_id *id = hid->driver->usage_table; 843 844 if (!id) /* NULL means all */ 845 return 1; 846 847 for (; id->usage_type != HID_ANY_ID - 1; id++) 848 if ((id->usage_hid == HID_ANY_ID || 849 id->usage_hid == usage->hid) && 850 (id->usage_type == HID_ANY_ID || 851 id->usage_type == usage->type) && 852 (id->usage_code == HID_ANY_ID || 853 id->usage_code == usage->code)) 854 return 1; 855 return 0; 856} 857 858static void hid_process_event(struct hid_device *hid, struct hid_field *field, 859 struct hid_usage *usage, __s32 value, int interrupt) 860{ 861 struct hid_driver *hdrv = hid->driver; 862 int ret; 863 864 hid_dump_input(usage, value); 865 866 if (hdrv && hdrv->event && hid_match_usage(hid, usage)) { 867 ret = hdrv->event(hid, field, usage, value); 868 if (ret != 0) { 869 if (ret < 0) 870 dbg_hid("%s's event failed with %d\n", 871 hdrv->name, ret); 872 return; 873 } 874 } 875 876 if (hid->claimed & HID_CLAIMED_INPUT) 877 hidinput_hid_event(hid, field, usage, value); 878 if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event) 879 hid->hiddev_hid_event(hid, field, usage, value); 880} 881 882/* 883 * Analyse a received field, and fetch the data from it. The field 884 * content is stored for next report processing (we do differential 885 * reporting to the layer). 886 */ 887 888static void hid_input_field(struct hid_device *hid, struct hid_field *field, 889 __u8 *data, int interrupt) 890{ 891 unsigned n; 892 unsigned count = field->report_count; 893 unsigned offset = field->report_offset; 894 unsigned size = field->report_size; 895 __s32 min = field->logical_minimum; 896 __s32 max = field->logical_maximum; 897 __s32 *value; 898 899 if (!(value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC))) 900 return; 901 902 for (n = 0; n < count; n++) { 903 904 value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) : 905 extract(data, offset + n * size, size); 906 907 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */ 908 && value[n] >= min && value[n] <= max 909 && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1) 910 goto exit; 911 } 912 913 for (n = 0; n < count; n++) { 914 915 if (HID_MAIN_ITEM_VARIABLE & field->flags) { 916 hid_process_event(hid, field, &field->usage[n], value[n], interrupt); 917 continue; 918 } 919 920 if (field->value[n] >= min && field->value[n] <= max 921 && field->usage[field->value[n] - min].hid 922 && search(value, field->value[n], count)) 923 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt); 924 925 if (value[n] >= min && value[n] <= max 926 && field->usage[value[n] - min].hid 927 && search(field->value, value[n], count)) 928 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt); 929 } 930 931 memcpy(field->value, value, count * sizeof(__s32)); 932exit: 933 kfree(value); 934} 935 936/* 937 * Output the field into the report. 938 */ 939 940static void hid_output_field(struct hid_field *field, __u8 *data) 941{ 942 unsigned count = field->report_count; 943 unsigned offset = field->report_offset; 944 unsigned size = field->report_size; 945 unsigned bitsused = offset + count * size; 946 unsigned n; 947 948 /* make sure the unused bits in the last byte are zeros */ 949 if (count > 0 && size > 0 && (bitsused % 8) != 0) 950 data[(bitsused-1)/8] &= (1 << (bitsused % 8)) - 1; 951 952 for (n = 0; n < count; n++) { 953 if (field->logical_minimum < 0) /* signed values */ 954 implement(data, offset + n * size, size, s32ton(field->value[n], size)); 955 else /* unsigned values */ 956 implement(data, offset + n * size, size, field->value[n]); 957 } 958} 959 960/* 961 * Create a report. 962 */ 963 964void hid_output_report(struct hid_report *report, __u8 *data) 965{ 966 unsigned n; 967 968 if (report->id > 0) 969 *data++ = report->id; 970 971 for (n = 0; n < report->maxfield; n++) 972 hid_output_field(report->field[n], data); 973} 974EXPORT_SYMBOL_GPL(hid_output_report); 975 976/* 977 * Set a field value. The report this field belongs to has to be 978 * created and transferred to the device, to set this value in the 979 * device. 980 */ 981 982int hid_set_field(struct hid_field *field, unsigned offset, __s32 value) 983{ 984 unsigned size = field->report_size; 985 986 hid_dump_input(field->usage + offset, value); 987 988 if (offset >= field->report_count) { 989 dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count); 990 hid_dump_field(field, 8); 991 return -1; 992 } 993 if (field->logical_minimum < 0) { 994 if (value != snto32(s32ton(value, size), size)) { 995 dbg_hid("value %d is out of range\n", value); 996 return -1; 997 } 998 } 999 field->value[offset] = value; 1000 return 0; 1001} 1002EXPORT_SYMBOL_GPL(hid_set_field); 1003 1004static struct hid_report *hid_get_report(struct hid_report_enum *report_enum, 1005 const u8 *data) 1006{ 1007 struct hid_report *report; 1008 unsigned int n = 0; /* Normally report number is 0 */ 1009 1010 /* Device uses numbered reports, data[0] is report number */ 1011 if (report_enum->numbered) 1012 n = *data; 1013 1014 report = report_enum->report_id_hash[n]; 1015 if (report == NULL) 1016 dbg_hid("undefined report_id %u received\n", n); 1017 1018 return report; 1019} 1020 1021void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size, 1022 int interrupt) 1023{ 1024 struct hid_report_enum *report_enum = hid->report_enum + type; 1025 struct hid_report *report; 1026 unsigned int a; 1027 int rsize, csize = size; 1028 u8 *cdata = data; 1029 1030 report = hid_get_report(report_enum, data); 1031 if (!report) 1032 return; 1033 1034 if (report_enum->numbered) { 1035 cdata++; 1036 csize--; 1037 } 1038 1039 rsize = ((report->size - 1) >> 3) + 1; 1040 1041 if (csize < rsize) { 1042 dbg_hid("report %d is too short, (%d < %d)\n", report->id, 1043 csize, rsize); 1044 memset(cdata + csize, 0, rsize - csize); 1045 } 1046 1047 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event) 1048 hid->hiddev_report_event(hid, report); 1049 if (hid->claimed & HID_CLAIMED_HIDRAW) { 1050 /* numbered reports need to be passed with the report num */ 1051 if (report_enum->numbered) 1052 hidraw_report_event(hid, data - 1, size + 1); 1053 else 1054 hidraw_report_event(hid, data, size); 1055 } 1056 1057 for (a = 0; a < report->maxfield; a++) 1058 hid_input_field(hid, report->field[a], cdata, interrupt); 1059 1060 if (hid->claimed & HID_CLAIMED_INPUT) 1061 hidinput_report_event(hid, report); 1062} 1063EXPORT_SYMBOL_GPL(hid_report_raw_event); 1064 1065/** 1066 * hid_input_report - report data from lower layer (usb, bt...) 1067 * 1068 * @hid: hid device 1069 * @type: HID report type (HID_*_REPORT) 1070 * @data: report contents 1071 * @size: size of data parameter 1072 * @interrupt: called from atomic? 1073 * 1074 * This is data entry for lower layers. 1075 */ 1076int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt) 1077{ 1078 struct hid_report_enum *report_enum = hid->report_enum + type; 1079 struct hid_driver *hdrv = hid->driver; 1080 struct hid_report *report; 1081 unsigned int i; 1082 int ret; 1083 1084 if (!hid || !hid->driver) 1085 return -ENODEV; 1086 1087 if (!size) { 1088 dbg_hid("empty report\n"); 1089 return -1; 1090 } 1091 1092 dbg_hid("report (size %u) (%snumbered)\n", size, report_enum->numbered ? "" : "un"); 1093 1094 report = hid_get_report(report_enum, data); 1095 if (!report) 1096 return -1; 1097 1098 /* dump the report */ 1099 dbg_hid("report %d (size %u) = ", report->id, size); 1100 for (i = 0; i < size; i++) 1101 dbg_hid_line(" %02x", data[i]); 1102 dbg_hid_line("\n"); 1103 1104 if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) { 1105 ret = hdrv->raw_event(hid, report, data, size); 1106 if (ret != 0) 1107 return ret < 0 ? ret : 0; 1108 } 1109 1110 hid_report_raw_event(hid, type, data, size, interrupt); 1111 1112 return 0; 1113} 1114EXPORT_SYMBOL_GPL(hid_input_report); 1115 1116static bool hid_match_one_id(struct hid_device *hdev, 1117 const struct hid_device_id *id) 1118{ 1119 return id->bus == hdev->bus && 1120 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) && 1121 (id->product == HID_ANY_ID || id->product == hdev->product); 1122} 1123 1124static const struct hid_device_id *hid_match_id(struct hid_device *hdev, 1125 const struct hid_device_id *id) 1126{ 1127 for (; id->bus; id++) 1128 if (hid_match_one_id(hdev, id)) 1129 return id; 1130 1131 return NULL; 1132} 1133 1134static const struct hid_device_id hid_blacklist[] = { 1135 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) }, 1136 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) }, 1137 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) }, 1138 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) }, 1139 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) }, 1140 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) }, 1141 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) }, 1142 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) }, 1143 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) }, 1144 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) }, 1145 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) }, 1146 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) }, 1147 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) }, 1148 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) }, 1149 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) }, 1150 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) }, 1151 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) }, 1152 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) }, 1153 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) }, 1154 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) }, 1155 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) }, 1156 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) }, 1157 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) }, 1158 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) }, 1159 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) }, 1160 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) }, 1161 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) }, 1162 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) }, 1163 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) }, 1164 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) }, 1165 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) }, 1166 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) }, 1167 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) }, 1168 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) }, 1169 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) }, 1170 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) }, 1171 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) }, 1172 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) }, 1173 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) }, 1174 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) }, 1175 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_KBD) }, 1176 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) }, 1177 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) }, 1178 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_LX3) }, 1179 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_V150) }, 1180 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) }, 1181 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) }, 1182 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) }, 1183 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) }, 1184 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) }, 1185 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) }, 1186 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) }, 1187 { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) }, 1188 1189 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 0x030c) }, 1190 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) }, 1191 { } 1192}; 1193 1194static int hid_bus_match(struct device *dev, struct device_driver *drv) 1195{ 1196 struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver); 1197 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1198 1199 if (!hid_match_id(hdev, hdrv->id_table)) 1200 return 0; 1201 1202 /* generic wants all non-blacklisted */ 1203 if (!strncmp(hdrv->name, "generic-", 8)) 1204 return !hid_match_id(hdev, hid_blacklist); 1205 1206 return 1; 1207} 1208 1209static int hid_device_probe(struct device *dev) 1210{ 1211 struct hid_driver *hdrv = container_of(dev->driver, 1212 struct hid_driver, driver); 1213 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1214 const struct hid_device_id *id; 1215 int ret = 0; 1216 1217 if (!hdev->driver) { 1218 id = hid_match_id(hdev, hdrv->id_table); 1219 if (id == NULL) 1220 return -ENODEV; 1221 1222 hdev->driver = hdrv; 1223 if (hdrv->probe) { 1224 ret = hdrv->probe(hdev, id); 1225 } else { /* default probe */ 1226 ret = hid_parse(hdev); 1227 if (!ret) 1228 ret = hid_hw_start(hdev); 1229 } 1230 if (ret) 1231 hdev->driver = NULL; 1232 } 1233 return ret; 1234} 1235 1236static int hid_device_remove(struct device *dev) 1237{ 1238 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1239 struct hid_driver *hdrv = hdev->driver; 1240 1241 if (hdrv) { 1242 if (hdrv->remove) 1243 hdrv->remove(hdev); 1244 else /* default remove */ 1245 hid_hw_stop(hdev); 1246 hdev->driver = NULL; 1247 } 1248 1249 return 0; 1250} 1251 1252static int hid_uevent(struct device *dev, struct kobj_uevent_env *env) 1253{ 1254 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1255 1256 if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X", 1257 hdev->bus, hdev->vendor, hdev->product)) 1258 return -ENOMEM; 1259 1260 if (add_uevent_var(env, "HID_NAME=%s", hdev->name)) 1261 return -ENOMEM; 1262 1263 if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys)) 1264 return -ENOMEM; 1265 1266 if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq)) 1267 return -ENOMEM; 1268 1269 if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X", 1270 hdev->bus, hdev->vendor, hdev->product)) 1271 return -ENOMEM; 1272 1273 return 0; 1274} 1275 1276static struct bus_type hid_bus_type = { 1277 .name = "hid", 1278 .match = hid_bus_match, 1279 .probe = hid_device_probe, 1280 .remove = hid_device_remove, 1281 .uevent = hid_uevent, 1282}; 1283 1284static const struct hid_device_id hid_ignore_list[] = { 1285 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) }, 1286 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) }, 1287 { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) }, 1288 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) }, 1289 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) }, 1290 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) }, 1291 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) }, 1292 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) }, 1293 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) }, 1294 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) }, 1295 { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) }, 1296 { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) }, 1297 { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)}, 1298 { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) }, 1299 { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) }, 1300 { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) }, 1301 { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) }, 1302 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) }, 1303 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) }, 1304 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) }, 1305 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) }, 1306 { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) }, 1307 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) }, 1308 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) }, 1309 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) }, 1310 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) }, 1311 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) }, 1312 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) }, 1313 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) }, 1314 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) }, 1315 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) }, 1316 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) }, 1317 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) }, 1318 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) }, 1319 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) }, 1320 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) }, 1321 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) }, 1322 { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) }, 1323 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) }, 1324 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) }, 1325 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) }, 1326 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) }, 1327 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) }, 1328 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) }, 1329 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) }, 1330 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) }, 1331 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) }, 1332 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) }, 1333 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) }, 1334 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) }, 1335 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) }, 1336 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) }, 1337 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) }, 1338 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) }, 1339 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) }, 1340 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) }, 1341 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) }, 1342 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) }, 1343 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) }, 1344 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) }, 1345 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) }, 1346 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) }, 1347 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) }, 1348 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) }, 1349 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) }, 1350 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) }, 1351 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) }, 1352 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) }, 1353 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) }, 1354 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) }, 1355 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) }, 1356 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) }, 1357 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) }, 1358 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) }, 1359 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) }, 1360 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) }, 1361 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) }, 1362 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) }, 1363 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) }, 1364 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) }, 1365 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) }, 1366 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) }, 1367 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) }, 1368 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) }, 1369 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) }, 1370 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) }, 1371 { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) }, 1372 { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) }, 1373 { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) }, 1374 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) }, 1375 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) }, 1376 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) }, 1377 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) }, 1378 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) }, 1379 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) }, 1380 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY1) }, 1381 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) }, 1382 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) }, 1383 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) }, 1384 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) }, 1385 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) }, 1386 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) }, 1387 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) }, 1388 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) }, 1389 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) }, 1390 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) }, 1391 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) }, 1392 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) }, 1393 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) }, 1394 { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) }, 1395 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) }, 1396 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) }, 1397 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) }, 1398 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) }, 1399 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) }, 1400 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) }, 1401 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) }, 1402 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) }, 1403 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) }, 1404 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) }, 1405 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) }, 1406 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) }, 1407 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) }, 1408 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) }, 1409 { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD) }, 1410 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) }, 1411 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) }, 1412 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) }, 1413 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) }, 1414 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) }, 1415 { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) }, 1416 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) }, 1417 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) }, 1418 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) }, 1419 { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) }, 1420 { } 1421}; 1422 1423static bool hid_ignore(struct hid_device *hdev) 1424{ 1425 switch (hdev->vendor) { 1426 case USB_VENDOR_ID_CODEMERCS: 1427 /* ignore all Code Mercenaries IOWarrior devices */ 1428 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST && 1429 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST) 1430 return true; 1431 break; 1432 case USB_VENDOR_ID_LOGITECH: 1433 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST && 1434 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST) 1435 return true; 1436 break; 1437 } 1438 1439 return !!hid_match_id(hdev, hid_ignore_list); 1440} 1441 1442int hid_add_device(struct hid_device *hdev) 1443{ 1444 static atomic_t id = ATOMIC_INIT(0); 1445 int ret; 1446 1447 if (WARN_ON(hdev->status & HID_STAT_ADDED)) 1448 return -EBUSY; 1449 1450 /* we need to kill them here, otherwise they will stay allocated to 1451 * wait for coming driver */ 1452 if (hid_ignore(hdev)) 1453 return -ENODEV; 1454 1455 /* XXX hack, any other cleaner solution < 20 bus_id bytes? */ 1456 sprintf(hdev->dev.bus_id, "%04X:%04X:%04X.%04X", hdev->bus, 1457 hdev->vendor, hdev->product, atomic_inc_return(&id)); 1458 1459 ret = device_add(&hdev->dev); 1460 if (!ret) 1461 hdev->status |= HID_STAT_ADDED; 1462 1463 return ret; 1464} 1465EXPORT_SYMBOL_GPL(hid_add_device); 1466 1467/** 1468 * hid_allocate_device - allocate new hid device descriptor 1469 * 1470 * Allocate and initialize hid device, so that hid_destroy_device might be 1471 * used to free it. 1472 * 1473 * New hid_device pointer is returned on success, otherwise ERR_PTR encoded 1474 * error value. 1475 */ 1476struct hid_device *hid_allocate_device(void) 1477{ 1478 struct hid_device *hdev; 1479 unsigned int i; 1480 int ret = -ENOMEM; 1481 1482 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL); 1483 if (hdev == NULL) 1484 return ERR_PTR(ret); 1485 1486 device_initialize(&hdev->dev); 1487 hdev->dev.release = hid_device_release; 1488 hdev->dev.bus = &hid_bus_type; 1489 1490 hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS, 1491 sizeof(struct hid_collection), GFP_KERNEL); 1492 if (hdev->collection == NULL) 1493 goto err; 1494 hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS; 1495 1496 for (i = 0; i < HID_REPORT_TYPES; i++) 1497 INIT_LIST_HEAD(&hdev->report_enum[i].report_list); 1498 1499 return hdev; 1500err: 1501 put_device(&hdev->dev); 1502 return ERR_PTR(ret); 1503} 1504EXPORT_SYMBOL_GPL(hid_allocate_device); 1505 1506static void hid_remove_device(struct hid_device *hdev) 1507{ 1508 if (hdev->status & HID_STAT_ADDED) { 1509 device_del(&hdev->dev); 1510 hdev->status &= ~HID_STAT_ADDED; 1511 } 1512} 1513 1514/** 1515 * hid_destroy_device - free previously allocated device 1516 * 1517 * @hdev: hid device 1518 * 1519 * If you allocate hid_device through hid_allocate_device, you should ever 1520 * free by this function. 1521 */ 1522void hid_destroy_device(struct hid_device *hdev) 1523{ 1524 hid_remove_device(hdev); 1525 put_device(&hdev->dev); 1526} 1527EXPORT_SYMBOL_GPL(hid_destroy_device); 1528 1529int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, 1530 const char *mod_name) 1531{ 1532 hdrv->driver.name = hdrv->name; 1533 hdrv->driver.bus = &hid_bus_type; 1534 hdrv->driver.owner = owner; 1535 hdrv->driver.mod_name = mod_name; 1536 1537 return driver_register(&hdrv->driver); 1538} 1539EXPORT_SYMBOL_GPL(__hid_register_driver); 1540 1541void hid_unregister_driver(struct hid_driver *hdrv) 1542{ 1543 driver_unregister(&hdrv->driver); 1544} 1545EXPORT_SYMBOL_GPL(hid_unregister_driver); 1546 1547#ifdef CONFIG_HID_COMPAT 1548static void hid_compat_load(struct work_struct *ws) 1549{ 1550 request_module("hid-dummy"); 1551} 1552static DECLARE_WORK(hid_compat_work, hid_compat_load); 1553#endif 1554 1555static int __init hid_init(void) 1556{ 1557 int ret; 1558 1559 ret = bus_register(&hid_bus_type); 1560 if (ret) { 1561 printk(KERN_ERR "HID: can't register hid bus\n"); 1562 goto err; 1563 } 1564 1565 ret = hidraw_init(); 1566 if (ret) 1567 goto err_bus; 1568 1569#ifdef CONFIG_HID_COMPAT 1570 schedule_work(&hid_compat_work); 1571#endif 1572 1573 return 0; 1574err_bus: 1575 bus_unregister(&hid_bus_type); 1576err: 1577 return ret; 1578} 1579 1580static void __exit hid_exit(void) 1581{ 1582 hidraw_exit(); 1583 bus_unregister(&hid_bus_type); 1584} 1585 1586module_init(hid_init); 1587module_exit(hid_exit); 1588 1589MODULE_LICENSE(DRIVER_LICENSE); 1590 1591