hid-core.c revision 8c19a51591d06f5226499972567f528cf6066bb7
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) { 297 298 case HID_GLOBAL_ITEM_TAG_PUSH: 299 300 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) { 301 dbg_hid("global enviroment stack overflow\n"); 302 return -1; 303 } 304 305 memcpy(parser->global_stack + parser->global_stack_ptr++, 306 &parser->global, sizeof(struct hid_global)); 307 return 0; 308 309 case HID_GLOBAL_ITEM_TAG_POP: 310 311 if (!parser->global_stack_ptr) { 312 dbg_hid("global enviroment stack underflow\n"); 313 return -1; 314 } 315 316 memcpy(&parser->global, parser->global_stack + --parser->global_stack_ptr, 317 sizeof(struct hid_global)); 318 return 0; 319 320 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE: 321 parser->global.usage_page = item_udata(item); 322 return 0; 323 324 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM: 325 parser->global.logical_minimum = item_sdata(item); 326 return 0; 327 328 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM: 329 if (parser->global.logical_minimum < 0) 330 parser->global.logical_maximum = item_sdata(item); 331 else 332 parser->global.logical_maximum = item_udata(item); 333 return 0; 334 335 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM: 336 parser->global.physical_minimum = item_sdata(item); 337 return 0; 338 339 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM: 340 if (parser->global.physical_minimum < 0) 341 parser->global.physical_maximum = item_sdata(item); 342 else 343 parser->global.physical_maximum = item_udata(item); 344 return 0; 345 346 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT: 347 parser->global.unit_exponent = item_sdata(item); 348 return 0; 349 350 case HID_GLOBAL_ITEM_TAG_UNIT: 351 parser->global.unit = item_udata(item); 352 return 0; 353 354 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE: 355 if ((parser->global.report_size = item_udata(item)) > 32) { 356 dbg_hid("invalid report_size %d\n", parser->global.report_size); 357 return -1; 358 } 359 return 0; 360 361 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT: 362 if ((parser->global.report_count = item_udata(item)) > HID_MAX_USAGES) { 363 dbg_hid("invalid report_count %d\n", parser->global.report_count); 364 return -1; 365 } 366 return 0; 367 368 case HID_GLOBAL_ITEM_TAG_REPORT_ID: 369 if ((parser->global.report_id = item_udata(item)) == 0) { 370 dbg_hid("report_id 0 is invalid\n"); 371 return -1; 372 } 373 return 0; 374 375 default: 376 dbg_hid("unknown global tag 0x%x\n", item->tag); 377 return -1; 378 } 379} 380 381/* 382 * Process a local item. 383 */ 384 385static int hid_parser_local(struct hid_parser *parser, struct hid_item *item) 386{ 387 __u32 data; 388 unsigned n; 389 390 if (item->size == 0) { 391 dbg_hid("item data expected for local item\n"); 392 return -1; 393 } 394 395 data = item_udata(item); 396 397 switch (item->tag) { 398 399 case HID_LOCAL_ITEM_TAG_DELIMITER: 400 401 if (data) { 402 /* 403 * We treat items before the first delimiter 404 * as global to all usage sets (branch 0). 405 * In the moment we process only these global 406 * items and the first delimiter set. 407 */ 408 if (parser->local.delimiter_depth != 0) { 409 dbg_hid("nested delimiters\n"); 410 return -1; 411 } 412 parser->local.delimiter_depth++; 413 parser->local.delimiter_branch++; 414 } else { 415 if (parser->local.delimiter_depth < 1) { 416 dbg_hid("bogus close delimiter\n"); 417 return -1; 418 } 419 parser->local.delimiter_depth--; 420 } 421 return 1; 422 423 case HID_LOCAL_ITEM_TAG_USAGE: 424 425 if (parser->local.delimiter_branch > 1) { 426 dbg_hid("alternative usage ignored\n"); 427 return 0; 428 } 429 430 if (item->size <= 2) 431 data = (parser->global.usage_page << 16) + data; 432 433 return hid_add_usage(parser, data); 434 435 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM: 436 437 if (parser->local.delimiter_branch > 1) { 438 dbg_hid("alternative usage ignored\n"); 439 return 0; 440 } 441 442 if (item->size <= 2) 443 data = (parser->global.usage_page << 16) + data; 444 445 parser->local.usage_minimum = data; 446 return 0; 447 448 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM: 449 450 if (parser->local.delimiter_branch > 1) { 451 dbg_hid("alternative usage ignored\n"); 452 return 0; 453 } 454 455 if (item->size <= 2) 456 data = (parser->global.usage_page << 16) + data; 457 458 for (n = parser->local.usage_minimum; n <= data; n++) 459 if (hid_add_usage(parser, n)) { 460 dbg_hid("hid_add_usage failed\n"); 461 return -1; 462 } 463 return 0; 464 465 default: 466 467 dbg_hid("unknown local item tag 0x%x\n", item->tag); 468 return 0; 469 } 470 return 0; 471} 472 473/* 474 * Process a main item. 475 */ 476 477static int hid_parser_main(struct hid_parser *parser, struct hid_item *item) 478{ 479 __u32 data; 480 int ret; 481 482 data = item_udata(item); 483 484 switch (item->tag) { 485 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION: 486 ret = open_collection(parser, data & 0xff); 487 break; 488 case HID_MAIN_ITEM_TAG_END_COLLECTION: 489 ret = close_collection(parser); 490 break; 491 case HID_MAIN_ITEM_TAG_INPUT: 492 ret = hid_add_field(parser, HID_INPUT_REPORT, data); 493 break; 494 case HID_MAIN_ITEM_TAG_OUTPUT: 495 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data); 496 break; 497 case HID_MAIN_ITEM_TAG_FEATURE: 498 ret = hid_add_field(parser, HID_FEATURE_REPORT, data); 499 break; 500 default: 501 dbg_hid("unknown main item tag 0x%x\n", item->tag); 502 ret = 0; 503 } 504 505 memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */ 506 507 return ret; 508} 509 510/* 511 * Process a reserved item. 512 */ 513 514static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item) 515{ 516 dbg_hid("reserved item type, tag 0x%x\n", item->tag); 517 return 0; 518} 519 520/* 521 * Free a report and all registered fields. The field->usage and 522 * field->value table's are allocated behind the field, so we need 523 * only to free(field) itself. 524 */ 525 526static void hid_free_report(struct hid_report *report) 527{ 528 unsigned n; 529 530 for (n = 0; n < report->maxfield; n++) 531 kfree(report->field[n]); 532 kfree(report); 533} 534 535/* 536 * Free a device structure, all reports, and all fields. 537 */ 538 539static void hid_device_release(struct device *dev) 540{ 541 struct hid_device *device = container_of(dev, struct hid_device, dev); 542 unsigned i, j; 543 544 for (i = 0; i < HID_REPORT_TYPES; i++) { 545 struct hid_report_enum *report_enum = device->report_enum + i; 546 547 for (j = 0; j < 256; j++) { 548 struct hid_report *report = report_enum->report_id_hash[j]; 549 if (report) 550 hid_free_report(report); 551 } 552 } 553 554 kfree(device->rdesc); 555 kfree(device->collection); 556 kfree(device); 557} 558 559/* 560 * Fetch a report description item from the data stream. We support long 561 * items, though they are not used yet. 562 */ 563 564static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item) 565{ 566 u8 b; 567 568 if ((end - start) <= 0) 569 return NULL; 570 571 b = *start++; 572 573 item->type = (b >> 2) & 3; 574 item->tag = (b >> 4) & 15; 575 576 if (item->tag == HID_ITEM_TAG_LONG) { 577 578 item->format = HID_ITEM_FORMAT_LONG; 579 580 if ((end - start) < 2) 581 return NULL; 582 583 item->size = *start++; 584 item->tag = *start++; 585 586 if ((end - start) < item->size) 587 return NULL; 588 589 item->data.longdata = start; 590 start += item->size; 591 return start; 592 } 593 594 item->format = HID_ITEM_FORMAT_SHORT; 595 item->size = b & 3; 596 597 switch (item->size) { 598 599 case 0: 600 return start; 601 602 case 1: 603 if ((end - start) < 1) 604 return NULL; 605 item->data.u8 = *start++; 606 return start; 607 608 case 2: 609 if ((end - start) < 2) 610 return NULL; 611 item->data.u16 = get_unaligned_le16(start); 612 start = (__u8 *)((__le16 *)start + 1); 613 return start; 614 615 case 3: 616 item->size++; 617 if ((end - start) < 4) 618 return NULL; 619 item->data.u32 = get_unaligned_le32(start); 620 start = (__u8 *)((__le32 *)start + 1); 621 return start; 622 } 623 624 return NULL; 625} 626 627/** 628 * hid_parse_report - parse device report 629 * 630 * @device: hid device 631 * @start: report start 632 * @size: report size 633 * 634 * Parse a report description into a hid_device structure. Reports are 635 * enumerated, fields are attached to these reports. 636 * 0 returned on success, otherwise nonzero error value. 637 */ 638int hid_parse_report(struct hid_device *device, __u8 *start, 639 unsigned size) 640{ 641 struct hid_parser *parser; 642 struct hid_item item; 643 __u8 *end; 644 int ret; 645 static int (*dispatch_type[])(struct hid_parser *parser, 646 struct hid_item *item) = { 647 hid_parser_main, 648 hid_parser_global, 649 hid_parser_local, 650 hid_parser_reserved 651 }; 652 653 if (device->driver->report_fixup) 654 device->driver->report_fixup(device, start, size); 655 656 device->rdesc = kmalloc(size, GFP_KERNEL); 657 if (device->rdesc == NULL) 658 return -ENOMEM; 659 memcpy(device->rdesc, start, size); 660 device->rsize = size; 661 662 parser = vmalloc(sizeof(struct hid_parser)); 663 if (!parser) { 664 ret = -ENOMEM; 665 goto err; 666 } 667 668 memset(parser, 0, sizeof(struct hid_parser)); 669 parser->device = device; 670 671 end = start + size; 672 ret = -EINVAL; 673 while ((start = fetch_item(start, end, &item)) != NULL) { 674 675 if (item.format != HID_ITEM_FORMAT_SHORT) { 676 dbg_hid("unexpected long global item\n"); 677 goto err; 678 } 679 680 if (dispatch_type[item.type](parser, &item)) { 681 dbg_hid("item %u %u %u %u parsing failed\n", 682 item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag); 683 goto err; 684 } 685 686 if (start == end) { 687 if (parser->collection_stack_ptr) { 688 dbg_hid("unbalanced collection at end of report description\n"); 689 goto err; 690 } 691 if (parser->local.delimiter_depth) { 692 dbg_hid("unbalanced delimiter at end of report description\n"); 693 goto err; 694 } 695 vfree(parser); 696 return 0; 697 } 698 } 699 700 dbg_hid("item fetching failed at offset %d\n", (int)(end - start)); 701err: 702 vfree(parser); 703 return ret; 704} 705EXPORT_SYMBOL_GPL(hid_parse_report); 706 707/* 708 * Convert a signed n-bit integer to signed 32-bit integer. Common 709 * cases are done through the compiler, the screwed things has to be 710 * done by hand. 711 */ 712 713static s32 snto32(__u32 value, unsigned n) 714{ 715 switch (n) { 716 case 8: return ((__s8)value); 717 case 16: return ((__s16)value); 718 case 32: return ((__s32)value); 719 } 720 return value & (1 << (n - 1)) ? value | (-1 << n) : value; 721} 722 723/* 724 * Convert a signed 32-bit integer to a signed n-bit integer. 725 */ 726 727static u32 s32ton(__s32 value, unsigned n) 728{ 729 s32 a = value >> (n - 1); 730 if (a && a != -1) 731 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1; 732 return value & ((1 << n) - 1); 733} 734 735/* 736 * Extract/implement a data field from/to a little endian report (bit array). 737 * 738 * Code sort-of follows HID spec: 739 * http://www.usb.org/developers/devclass_docs/HID1_11.pdf 740 * 741 * While the USB HID spec allows unlimited length bit fields in "report 742 * descriptors", most devices never use more than 16 bits. 743 * One model of UPS is claimed to report "LINEV" as a 32-bit field. 744 * Search linux-kernel and linux-usb-devel archives for "hid-core extract". 745 */ 746 747static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n) 748{ 749 u64 x; 750 751 if (n > 32) 752 printk(KERN_WARNING "HID: extract() called with n (%d) > 32! (%s)\n", 753 n, current->comm); 754 755 report += offset >> 3; /* adjust byte index */ 756 offset &= 7; /* now only need bit offset into one byte */ 757 x = get_unaligned_le64(report); 758 x = (x >> offset) & ((1ULL << n) - 1); /* extract bit field */ 759 return (u32) x; 760} 761 762/* 763 * "implement" : set bits in a little endian bit stream. 764 * Same concepts as "extract" (see comments above). 765 * The data mangled in the bit stream remains in little endian 766 * order the whole time. It make more sense to talk about 767 * endianness of register values by considering a register 768 * a "cached" copy of the little endiad bit stream. 769 */ 770static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value) 771{ 772 u64 x; 773 u64 m = (1ULL << n) - 1; 774 775 if (n > 32) 776 printk(KERN_WARNING "HID: implement() called with n (%d) > 32! (%s)\n", 777 n, current->comm); 778 779 if (value > m) 780 printk(KERN_WARNING "HID: implement() called with too large value %d! (%s)\n", 781 value, current->comm); 782 WARN_ON(value > m); 783 value &= m; 784 785 report += offset >> 3; 786 offset &= 7; 787 788 x = get_unaligned_le64(report); 789 x &= ~(m << offset); 790 x |= ((u64)value) << offset; 791 put_unaligned_le64(x, report); 792} 793 794/* 795 * Search an array for a value. 796 */ 797 798static __inline__ int search(__s32 *array, __s32 value, unsigned n) 799{ 800 while (n--) { 801 if (*array++ == value) 802 return 0; 803 } 804 return -1; 805} 806 807/** 808 * hid_match_report - check if driver's raw_event should be called 809 * 810 * @hid: hid device 811 * @report_type: type to match against 812 * 813 * compare hid->driver->report_table->report_type to report->type 814 */ 815static int hid_match_report(struct hid_device *hid, struct hid_report *report) 816{ 817 const struct hid_report_id *id = hid->driver->report_table; 818 819 if (!id) /* NULL means all */ 820 return 1; 821 822 for (; id->report_type != HID_TERMINATOR; id++) 823 if (id->report_type == HID_ANY_ID || 824 id->report_type == report->type) 825 return 1; 826 return 0; 827} 828 829/** 830 * hid_match_usage - check if driver's event should be called 831 * 832 * @hid: hid device 833 * @usage: usage to match against 834 * 835 * compare hid->driver->usage_table->usage_{type,code} to 836 * usage->usage_{type,code} 837 */ 838static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage) 839{ 840 const struct hid_usage_id *id = hid->driver->usage_table; 841 842 if (!id) /* NULL means all */ 843 return 1; 844 845 for (; id->usage_type != HID_ANY_ID - 1; id++) 846 if ((id->usage_hid == HID_ANY_ID || 847 id->usage_hid == usage->hid) && 848 (id->usage_type == HID_ANY_ID || 849 id->usage_type == usage->type) && 850 (id->usage_code == HID_ANY_ID || 851 id->usage_code == usage->code)) 852 return 1; 853 return 0; 854} 855 856static void hid_process_event(struct hid_device *hid, struct hid_field *field, 857 struct hid_usage *usage, __s32 value, int interrupt) 858{ 859 struct hid_driver *hdrv = hid->driver; 860 int ret; 861 862 hid_dump_input(usage, value); 863 864 if (hdrv && hdrv->event && hid_match_usage(hid, usage)) { 865 ret = hdrv->event(hid, field, usage, value); 866 if (ret != 0) { 867 if (ret < 0) 868 dbg_hid("%s's event failed with %d\n", 869 hdrv->name, ret); 870 return; 871 } 872 } 873 874 if (hid->claimed & HID_CLAIMED_INPUT) 875 hidinput_hid_event(hid, field, usage, value); 876 if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event) 877 hid->hiddev_hid_event(hid, field, usage, value); 878} 879 880/* 881 * Analyse a received field, and fetch the data from it. The field 882 * content is stored for next report processing (we do differential 883 * reporting to the layer). 884 */ 885 886static void hid_input_field(struct hid_device *hid, struct hid_field *field, 887 __u8 *data, int interrupt) 888{ 889 unsigned n; 890 unsigned count = field->report_count; 891 unsigned offset = field->report_offset; 892 unsigned size = field->report_size; 893 __s32 min = field->logical_minimum; 894 __s32 max = field->logical_maximum; 895 __s32 *value; 896 897 if (!(value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC))) 898 return; 899 900 for (n = 0; n < count; n++) { 901 902 value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) : 903 extract(data, offset + n * size, size); 904 905 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */ 906 && value[n] >= min && value[n] <= max 907 && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1) 908 goto exit; 909 } 910 911 for (n = 0; n < count; n++) { 912 913 if (HID_MAIN_ITEM_VARIABLE & field->flags) { 914 hid_process_event(hid, field, &field->usage[n], value[n], interrupt); 915 continue; 916 } 917 918 if (field->value[n] >= min && field->value[n] <= max 919 && field->usage[field->value[n] - min].hid 920 && search(value, field->value[n], count)) 921 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt); 922 923 if (value[n] >= min && value[n] <= max 924 && field->usage[value[n] - min].hid 925 && search(field->value, value[n], count)) 926 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt); 927 } 928 929 memcpy(field->value, value, count * sizeof(__s32)); 930exit: 931 kfree(value); 932} 933 934/* 935 * Output the field into the report. 936 */ 937 938static void hid_output_field(struct hid_field *field, __u8 *data) 939{ 940 unsigned count = field->report_count; 941 unsigned offset = field->report_offset; 942 unsigned size = field->report_size; 943 unsigned bitsused = offset + count * size; 944 unsigned n; 945 946 /* make sure the unused bits in the last byte are zeros */ 947 if (count > 0 && size > 0 && (bitsused % 8) != 0) 948 data[(bitsused-1)/8] &= (1 << (bitsused % 8)) - 1; 949 950 for (n = 0; n < count; n++) { 951 if (field->logical_minimum < 0) /* signed values */ 952 implement(data, offset + n * size, size, s32ton(field->value[n], size)); 953 else /* unsigned values */ 954 implement(data, offset + n * size, size, field->value[n]); 955 } 956} 957 958/* 959 * Create a report. 960 */ 961 962void hid_output_report(struct hid_report *report, __u8 *data) 963{ 964 unsigned n; 965 966 if (report->id > 0) 967 *data++ = report->id; 968 969 for (n = 0; n < report->maxfield; n++) 970 hid_output_field(report->field[n], data); 971} 972EXPORT_SYMBOL_GPL(hid_output_report); 973 974/* 975 * Set a field value. The report this field belongs to has to be 976 * created and transferred to the device, to set this value in the 977 * device. 978 */ 979 980int hid_set_field(struct hid_field *field, unsigned offset, __s32 value) 981{ 982 unsigned size = field->report_size; 983 984 hid_dump_input(field->usage + offset, value); 985 986 if (offset >= field->report_count) { 987 dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count); 988 hid_dump_field(field, 8); 989 return -1; 990 } 991 if (field->logical_minimum < 0) { 992 if (value != snto32(s32ton(value, size), size)) { 993 dbg_hid("value %d is out of range\n", value); 994 return -1; 995 } 996 } 997 field->value[offset] = value; 998 return 0; 999} 1000EXPORT_SYMBOL_GPL(hid_set_field); 1001 1002static struct hid_report *hid_get_report(struct hid_report_enum *report_enum, 1003 const u8 *data) 1004{ 1005 struct hid_report *report; 1006 unsigned int n = 0; /* Normally report number is 0 */ 1007 1008 /* Device uses numbered reports, data[0] is report number */ 1009 if (report_enum->numbered) 1010 n = *data; 1011 1012 report = report_enum->report_id_hash[n]; 1013 if (report == NULL) 1014 dbg_hid("undefined report_id %u received\n", n); 1015 1016 return report; 1017} 1018 1019void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size, 1020 int interrupt) 1021{ 1022 struct hid_report_enum *report_enum = hid->report_enum + type; 1023 struct hid_report *report; 1024 unsigned int a; 1025 int rsize, csize = size; 1026 u8 *cdata = data; 1027 1028 report = hid_get_report(report_enum, data); 1029 if (!report) 1030 return; 1031 1032 if (report_enum->numbered) { 1033 cdata++; 1034 csize--; 1035 } 1036 1037 rsize = ((report->size - 1) >> 3) + 1; 1038 1039 if (csize < rsize) { 1040 dbg_hid("report %d is too short, (%d < %d)\n", report->id, 1041 csize, rsize); 1042 memset(cdata + csize, 0, rsize - csize); 1043 } 1044 1045 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event) 1046 hid->hiddev_report_event(hid, report); 1047 if (hid->claimed & HID_CLAIMED_HIDRAW) { 1048 /* numbered reports need to be passed with the report num */ 1049 if (report_enum->numbered) 1050 hidraw_report_event(hid, data - 1, size + 1); 1051 else 1052 hidraw_report_event(hid, data, size); 1053 } 1054 1055 for (a = 0; a < report->maxfield; a++) 1056 hid_input_field(hid, report->field[a], cdata, interrupt); 1057 1058 if (hid->claimed & HID_CLAIMED_INPUT) 1059 hidinput_report_event(hid, report); 1060} 1061EXPORT_SYMBOL_GPL(hid_report_raw_event); 1062 1063/** 1064 * hid_input_report - report data from lower layer (usb, bt...) 1065 * 1066 * @hid: hid device 1067 * @type: HID report type (HID_*_REPORT) 1068 * @data: report contents 1069 * @size: size of data parameter 1070 * @interrupt: called from atomic? 1071 * 1072 * This is data entry for lower layers. 1073 */ 1074int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt) 1075{ 1076 struct hid_report_enum *report_enum = hid->report_enum + type; 1077 struct hid_driver *hdrv = hid->driver; 1078 struct hid_report *report; 1079 unsigned int i; 1080 int ret; 1081 1082 if (!hid || !hid->driver) 1083 return -ENODEV; 1084 1085 if (!size) { 1086 dbg_hid("empty report\n"); 1087 return -1; 1088 } 1089 1090 dbg_hid("report (size %u) (%snumbered)\n", size, report_enum->numbered ? "" : "un"); 1091 1092 report = hid_get_report(report_enum, data); 1093 if (!report) 1094 return -1; 1095 1096 /* dump the report */ 1097 dbg_hid("report %d (size %u) = ", report->id, size); 1098 for (i = 0; i < size; i++) 1099 dbg_hid_line(" %02x", data[i]); 1100 dbg_hid_line("\n"); 1101 1102 if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) { 1103 ret = hdrv->raw_event(hid, report, data, size); 1104 if (ret != 0) 1105 return ret < 0 ? ret : 0; 1106 } 1107 1108 hid_report_raw_event(hid, type, data, size, interrupt); 1109 1110 return 0; 1111} 1112EXPORT_SYMBOL_GPL(hid_input_report); 1113 1114static bool hid_match_one_id(struct hid_device *hdev, 1115 const struct hid_device_id *id) 1116{ 1117 return id->bus == hdev->bus && 1118 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) && 1119 (id->product == HID_ANY_ID || id->product == hdev->product); 1120} 1121 1122static const struct hid_device_id *hid_match_id(struct hid_device *hdev, 1123 const struct hid_device_id *id) 1124{ 1125 for (; id->bus; id++) 1126 if (hid_match_one_id(hdev, id)) 1127 return id; 1128 1129 return NULL; 1130} 1131 1132static const struct hid_device_id hid_blacklist[] = { 1133 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) }, 1134 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) }, 1135 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) }, 1136 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) }, 1137 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) }, 1138 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) }, 1139 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) }, 1140 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) }, 1141 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) }, 1142 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) }, 1143 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) }, 1144 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) }, 1145 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) }, 1146 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) }, 1147 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) }, 1148 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) }, 1149 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) }, 1150 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) }, 1151 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) }, 1152 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) }, 1153 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) }, 1154 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) }, 1155 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) }, 1156 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) }, 1157 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) }, 1158 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) }, 1159 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) }, 1160 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) }, 1161 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) }, 1162 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) }, 1163 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) }, 1164 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) }, 1165 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) }, 1166 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) }, 1167 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) }, 1168 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) }, 1169 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) }, 1170 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_KBD) }, 1171 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) }, 1172 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) }, 1173 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_LX3) }, 1174 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_V150) }, 1175 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) }, 1176 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) }, 1177 1178 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 0x030c) }, 1179 { } 1180}; 1181 1182static int hid_bus_match(struct device *dev, struct device_driver *drv) 1183{ 1184 struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver); 1185 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1186 1187 if (!hid_match_id(hdev, hdrv->id_table)) 1188 return 0; 1189 1190 /* generic wants all non-blacklisted */ 1191 if (!strncmp(hdrv->name, "generic-", 8)) 1192 return !hid_match_id(hdev, hid_blacklist); 1193 1194 return 1; 1195} 1196 1197static int hid_device_probe(struct device *dev) 1198{ 1199 struct hid_driver *hdrv = container_of(dev->driver, 1200 struct hid_driver, driver); 1201 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1202 const struct hid_device_id *id; 1203 int ret = 0; 1204 1205 if (!hdev->driver) { 1206 id = hid_match_id(hdev, hdrv->id_table); 1207 if (id == NULL) 1208 return -ENODEV; 1209 1210 hdev->driver = hdrv; 1211 if (hdrv->probe) { 1212 ret = hdrv->probe(hdev, id); 1213 } else { /* default probe */ 1214 ret = hid_parse(hdev); 1215 if (!ret) 1216 ret = hid_hw_start(hdev); 1217 } 1218 if (ret) 1219 hdev->driver = NULL; 1220 } 1221 return ret; 1222} 1223 1224static int hid_device_remove(struct device *dev) 1225{ 1226 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1227 struct hid_driver *hdrv = hdev->driver; 1228 1229 if (hdrv) { 1230 if (hdrv->remove) 1231 hdrv->remove(hdev); 1232 else /* default remove */ 1233 hid_hw_stop(hdev); 1234 hdev->driver = NULL; 1235 } 1236 1237 return 0; 1238} 1239 1240static int hid_uevent(struct device *dev, struct kobj_uevent_env *env) 1241{ 1242 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 1243 1244 if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X", 1245 hdev->bus, hdev->vendor, hdev->product)) 1246 return -ENOMEM; 1247 1248 if (add_uevent_var(env, "HID_NAME=%s", hdev->name)) 1249 return -ENOMEM; 1250 1251 if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys)) 1252 return -ENOMEM; 1253 1254 if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq)) 1255 return -ENOMEM; 1256 1257 if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X", 1258 hdev->bus, hdev->vendor, hdev->product)) 1259 return -ENOMEM; 1260 1261 return 0; 1262} 1263 1264static struct bus_type hid_bus_type = { 1265 .name = "hid", 1266 .match = hid_bus_match, 1267 .probe = hid_device_probe, 1268 .remove = hid_device_remove, 1269 .uevent = hid_uevent, 1270}; 1271 1272static const struct hid_device_id hid_ignore_list[] = { 1273 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) }, 1274 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) }, 1275 { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) }, 1276 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) }, 1277 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) }, 1278 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) }, 1279 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) }, 1280 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) }, 1281 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) }, 1282 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) }, 1283 { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) }, 1284 { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) }, 1285 { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)}, 1286 { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) }, 1287 { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) }, 1288 { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) }, 1289 { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) }, 1290 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) }, 1291 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) }, 1292 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) }, 1293 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) }, 1294 { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) }, 1295 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) }, 1296 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) }, 1297 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) }, 1298 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) }, 1299 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) }, 1300 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) }, 1301 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) }, 1302 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) }, 1303 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) }, 1304 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) }, 1305 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) }, 1306 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) }, 1307 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) }, 1308 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) }, 1309 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) }, 1310 { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) }, 1311 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) }, 1312 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) }, 1313 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) }, 1314 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) }, 1315 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) }, 1316 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) }, 1317 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) }, 1318 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) }, 1319 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) }, 1320 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) }, 1321 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) }, 1322 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) }, 1323 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) }, 1324 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) }, 1325 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) }, 1326 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) }, 1327 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) }, 1328 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) }, 1329 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) }, 1330 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) }, 1331 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) }, 1332 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) }, 1333 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) }, 1334 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) }, 1335 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) }, 1336 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) }, 1337 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) }, 1338 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) }, 1339 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) }, 1340 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) }, 1341 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) }, 1342 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) }, 1343 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) }, 1344 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) }, 1345 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) }, 1346 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) }, 1347 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) }, 1348 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) }, 1349 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) }, 1350 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) }, 1351 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) }, 1352 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) }, 1353 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) }, 1354 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) }, 1355 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) }, 1356 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) }, 1357 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) }, 1358 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) }, 1359 { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) }, 1360 { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) }, 1361 { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) }, 1362 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) }, 1363 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) }, 1364 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) }, 1365 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) }, 1366 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) }, 1367 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) }, 1368 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY1) }, 1369 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) }, 1370 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) }, 1371 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) }, 1372 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) }, 1373 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) }, 1374 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) }, 1375 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) }, 1376 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) }, 1377 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) }, 1378 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) }, 1379 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) }, 1380 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) }, 1381 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) }, 1382 { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) }, 1383 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) }, 1384 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) }, 1385 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) }, 1386 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) }, 1387 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) }, 1388 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) }, 1389 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) }, 1390 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) }, 1391 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) }, 1392 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) }, 1393 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) }, 1394 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) }, 1395 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) }, 1396 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) }, 1397 { HID_USB_DEVICE(USB_VENDOR_ID_SOUNDGRAPH, USB_DEVICE_ID_SOUNDGRAPH_IMON_LCD) }, 1398 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) }, 1399 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) }, 1400 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) }, 1401 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) }, 1402 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) }, 1403 { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) }, 1404 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) }, 1405 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) }, 1406 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) }, 1407 { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) }, 1408 { } 1409}; 1410 1411static bool hid_ignore(struct hid_device *hdev) 1412{ 1413 switch (hdev->vendor) { 1414 case USB_VENDOR_ID_CODEMERCS: 1415 /* ignore all Code Mercenaries IOWarrior devices */ 1416 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST && 1417 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST) 1418 return true; 1419 break; 1420 case USB_VENDOR_ID_LOGITECH: 1421 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST && 1422 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST) 1423 return true; 1424 break; 1425 } 1426 1427 return !!hid_match_id(hdev, hid_ignore_list); 1428} 1429 1430int hid_add_device(struct hid_device *hdev) 1431{ 1432 static atomic_t id = ATOMIC_INIT(0); 1433 int ret; 1434 1435 if (WARN_ON(hdev->status & HID_STAT_ADDED)) 1436 return -EBUSY; 1437 1438 /* we need to kill them here, otherwise they will stay allocated to 1439 * wait for coming driver */ 1440 if (hid_ignore(hdev)) 1441 return -ENODEV; 1442 1443 /* XXX hack, any other cleaner solution < 20 bus_id bytes? */ 1444 sprintf(hdev->dev.bus_id, "%04X:%04X:%04X.%04X", hdev->bus, 1445 hdev->vendor, hdev->product, atomic_inc_return(&id)); 1446 1447 ret = device_add(&hdev->dev); 1448 if (!ret) 1449 hdev->status |= HID_STAT_ADDED; 1450 1451 return ret; 1452} 1453EXPORT_SYMBOL_GPL(hid_add_device); 1454 1455/** 1456 * hid_allocate_device - allocate new hid device descriptor 1457 * 1458 * Allocate and initialize hid device, so that hid_destroy_device might be 1459 * used to free it. 1460 * 1461 * New hid_device pointer is returned on success, otherwise ERR_PTR encoded 1462 * error value. 1463 */ 1464struct hid_device *hid_allocate_device(void) 1465{ 1466 struct hid_device *hdev; 1467 unsigned int i; 1468 int ret = -ENOMEM; 1469 1470 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL); 1471 if (hdev == NULL) 1472 return ERR_PTR(ret); 1473 1474 device_initialize(&hdev->dev); 1475 hdev->dev.release = hid_device_release; 1476 hdev->dev.bus = &hid_bus_type; 1477 1478 hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS, 1479 sizeof(struct hid_collection), GFP_KERNEL); 1480 if (hdev->collection == NULL) 1481 goto err; 1482 hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS; 1483 1484 for (i = 0; i < HID_REPORT_TYPES; i++) 1485 INIT_LIST_HEAD(&hdev->report_enum[i].report_list); 1486 1487 return hdev; 1488err: 1489 put_device(&hdev->dev); 1490 return ERR_PTR(ret); 1491} 1492EXPORT_SYMBOL_GPL(hid_allocate_device); 1493 1494static void hid_remove_device(struct hid_device *hdev) 1495{ 1496 if (hdev->status & HID_STAT_ADDED) { 1497 device_del(&hdev->dev); 1498 hdev->status &= ~HID_STAT_ADDED; 1499 } 1500} 1501 1502/** 1503 * hid_destroy_device - free previously allocated device 1504 * 1505 * @hdev: hid device 1506 * 1507 * If you allocate hid_device through hid_allocate_device, you should ever 1508 * free by this function. 1509 */ 1510void hid_destroy_device(struct hid_device *hdev) 1511{ 1512 hid_remove_device(hdev); 1513 put_device(&hdev->dev); 1514} 1515EXPORT_SYMBOL_GPL(hid_destroy_device); 1516 1517int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, 1518 const char *mod_name) 1519{ 1520 hdrv->driver.name = hdrv->name; 1521 hdrv->driver.bus = &hid_bus_type; 1522 hdrv->driver.owner = owner; 1523 hdrv->driver.mod_name = mod_name; 1524 1525 return driver_register(&hdrv->driver); 1526} 1527EXPORT_SYMBOL_GPL(__hid_register_driver); 1528 1529void hid_unregister_driver(struct hid_driver *hdrv) 1530{ 1531 driver_unregister(&hdrv->driver); 1532} 1533EXPORT_SYMBOL_GPL(hid_unregister_driver); 1534 1535static int __init hid_init(void) 1536{ 1537 int ret; 1538 1539 ret = bus_register(&hid_bus_type); 1540 if (ret) { 1541 printk(KERN_ERR "HID: can't register hid bus\n"); 1542 goto err; 1543 } 1544 1545 ret = hidraw_init(); 1546 if (ret) 1547 goto err_bus; 1548 1549 return 0; 1550err_bus: 1551 bus_unregister(&hid_bus_type); 1552err: 1553 return ret; 1554} 1555 1556static void __exit hid_exit(void) 1557{ 1558 hidraw_exit(); 1559 bus_unregister(&hid_bus_type); 1560} 1561 1562module_init(hid_init); 1563module_exit(hid_exit); 1564 1565MODULE_LICENSE(DRIVER_LICENSE); 1566 1567