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1/*
2 * HID support for Linux
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2010 Jiri Kosina
8 */
9
10/*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; either version 2 of the License, or (at your option)
14 * any later version.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/init.h>
22#include <linux/kernel.h>
23#include <linux/list.h>
24#include <linux/mm.h>
25#include <linux/spinlock.h>
26#include <asm/unaligned.h>
27#include <asm/byteorder.h>
28#include <linux/input.h>
29#include <linux/wait.h>
30#include <linux/vmalloc.h>
31#include <linux/sched.h>
32
33#include <linux/hid.h>
34#include <linux/hiddev.h>
35#include <linux/hid-debug.h>
36#include <linux/hidraw.h>
37
38#include "hid-ids.h"
39
40/*
41 * Version Information
42 */
43
44#define DRIVER_DESC "HID core driver"
45#define DRIVER_LICENSE "GPL"
46
47int hid_debug = 0;
48module_param_named(debug, hid_debug, int, 0600);
49MODULE_PARM_DESC(debug, "toggle HID debugging messages");
50EXPORT_SYMBOL_GPL(hid_debug);
51
52/*
53 * Register a new report for a device.
54 */
55
56struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
57{
58 struct hid_report_enum *report_enum = device->report_enum + type;
59 struct hid_report *report;
60
61 if (report_enum->report_id_hash[id])
62 return report_enum->report_id_hash[id];
63
64 report = kzalloc(sizeof(struct hid_report), GFP_KERNEL);
65 if (!report)
66 return NULL;
67
68 if (id != 0)
69 report_enum->numbered = 1;
70
71 report->id = id;
72 report->type = type;
73 report->size = 0;
74 report->device = device;
75 report_enum->report_id_hash[id] = report;
76
77 list_add_tail(&report->list, &report_enum->report_list);
78
79 return report;
80}
81EXPORT_SYMBOL_GPL(hid_register_report);
82
83/*
84 * Register a new field for this report.
85 */
86
87static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
88{
89 struct hid_field *field;
90
91 if (report->maxfield == HID_MAX_FIELDS) {
92 dbg_hid("too many fields in report\n");
93 return NULL;
94 }
95
96 field = kzalloc((sizeof(struct hid_field) +
97 usages * sizeof(struct hid_usage) +
98 values * sizeof(unsigned)), GFP_KERNEL);
99 if (!field)
100 return NULL;
101
102 field->index = report->maxfield++;
103 report->field[field->index] = field;
104 field->usage = (struct hid_usage *)(field + 1);
105 field->value = (s32 *)(field->usage + usages);
106 field->report = report;
107
108 return field;
109}
110
111/*
112 * Open a collection. The type/usage is pushed on the stack.
113 */
114
115static int open_collection(struct hid_parser *parser, unsigned type)
116{
117 struct hid_collection *collection;
118 unsigned usage;
119
120 usage = parser->local.usage[0];
121
122 if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
123 dbg_hid("collection stack overflow\n");
124 return -1;
125 }
126
127 if (parser->device->maxcollection == parser->device->collection_size) {
128 collection = kmalloc(sizeof(struct hid_collection) *
129 parser->device->collection_size * 2, GFP_KERNEL);
130 if (collection == NULL) {
131 dbg_hid("failed to reallocate collection array\n");
132 return -1;
133 }
134 memcpy(collection, parser->device->collection,
135 sizeof(struct hid_collection) *
136 parser->device->collection_size);
137 memset(collection + parser->device->collection_size, 0,
138 sizeof(struct hid_collection) *
139 parser->device->collection_size);
140 kfree(parser->device->collection);
141 parser->device->collection = collection;
142 parser->device->collection_size *= 2;
143 }
144
145 parser->collection_stack[parser->collection_stack_ptr++] =
146 parser->device->maxcollection;
147
148 collection = parser->device->collection +
149 parser->device->maxcollection++;
150 collection->type = type;
151 collection->usage = usage;
152 collection->level = parser->collection_stack_ptr - 1;
153
154 if (type == HID_COLLECTION_APPLICATION)
155 parser->device->maxapplication++;
156
157 return 0;
158}
159
160/*
161 * Close a collection.
162 */
163
164static int close_collection(struct hid_parser *parser)
165{
166 if (!parser->collection_stack_ptr) {
167 dbg_hid("collection stack underflow\n");
168 return -1;
169 }
170 parser->collection_stack_ptr--;
171 return 0;
172}
173
174/*
175 * Climb up the stack, search for the specified collection type
176 * and return the usage.
177 */
178
179static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
180{
181 struct hid_collection *collection = parser->device->collection;
182 int n;
183
184 for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
185 unsigned index = parser->collection_stack[n];
186 if (collection[index].type == type)
187 return collection[index].usage;
188 }
189 return 0; /* we know nothing about this usage type */
190}
191
192/*
193 * Add a usage to the temporary parser table.
194 */
195
196static int hid_add_usage(struct hid_parser *parser, unsigned usage)
197{
198 if (parser->local.usage_index >= HID_MAX_USAGES) {
199 dbg_hid("usage index exceeded\n");
200 return -1;
201 }
202 parser->local.usage[parser->local.usage_index] = usage;
203 parser->local.collection_index[parser->local.usage_index] =
204 parser->collection_stack_ptr ?
205 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
206 parser->local.usage_index++;
207 return 0;
208}
209
210/*
211 * Register a new field for this report.
212 */
213
214static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
215{
216 struct hid_report *report;
217 struct hid_field *field;
218 int usages;
219 unsigned offset;
220 int i;
221
222 report = hid_register_report(parser->device, report_type, parser->global.report_id);
223 if (!report) {
224 dbg_hid("hid_register_report failed\n");
225 return -1;
226 }
227
228 if (parser->global.logical_maximum < parser->global.logical_minimum) {
229 dbg_hid("logical range invalid %d %d\n", parser->global.logical_minimum, parser->global.logical_maximum);
230 return -1;
231 }
232
233 offset = report->size;
234 report->size += parser->global.report_size * parser->global.report_count;
235
236 if (!parser->local.usage_index) /* Ignore padding fields */
237 return 0;
238
239 usages = max_t(int, parser->local.usage_index, parser->global.report_count);
240
241 field = hid_register_field(report, usages, parser->global.report_count);
242 if (!field)
243 return 0;
244
245 field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
246 field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
247 field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
248
249 for (i = 0; i < usages; i++) {
250 int j = i;
251 /* Duplicate the last usage we parsed if we have excess values */
252 if (i >= parser->local.usage_index)
253 j = parser->local.usage_index - 1;
254 field->usage[i].hid = parser->local.usage[j];
255 field->usage[i].collection_index =
256 parser->local.collection_index[j];
257 }
258
259 field->maxusage = usages;
260 field->flags = flags;
261 field->report_offset = offset;
262 field->report_type = report_type;
263 field->report_size = parser->global.report_size;
264 field->report_count = parser->global.report_count;
265 field->logical_minimum = parser->global.logical_minimum;
266 field->logical_maximum = parser->global.logical_maximum;
267 field->physical_minimum = parser->global.physical_minimum;
268 field->physical_maximum = parser->global.physical_maximum;
269 field->unit_exponent = parser->global.unit_exponent;
270 field->unit = parser->global.unit;
271
272 return 0;
273}
274
275/*
276 * Read data value from item.
277 */
278
279static u32 item_udata(struct hid_item *item)
280{
281 switch (item->size) {
282 case 1: return item->data.u8;
283 case 2: return item->data.u16;
284 case 4: return item->data.u32;
285 }
286 return 0;
287}
288
289static s32 item_sdata(struct hid_item *item)
290{
291 switch (item->size) {
292 case 1: return item->data.s8;
293 case 2: return item->data.s16;
294 case 4: return item->data.s32;
295 }
296 return 0;
297}
298
299/*
300 * Process a global item.
301 */
302
303static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
304{
305 switch (item->tag) {
306 case HID_GLOBAL_ITEM_TAG_PUSH:
307
308 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
309 dbg_hid("global environment stack overflow\n");
310 return -1;
311 }
312
313 memcpy(parser->global_stack + parser->global_stack_ptr++,
314 &parser->global, sizeof(struct hid_global));
315 return 0;
316
317 case HID_GLOBAL_ITEM_TAG_POP:
318
319 if (!parser->global_stack_ptr) {
320 dbg_hid("global environment stack underflow\n");
321 return -1;
322 }
323
324 memcpy(&parser->global, parser->global_stack +
325 --parser->global_stack_ptr, sizeof(struct hid_global));
326 return 0;
327
328 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
329 parser->global.usage_page = item_udata(item);
330 return 0;
331
332 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
333 parser->global.logical_minimum = item_sdata(item);
334 return 0;
335
336 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
337 if (parser->global.logical_minimum < 0)
338 parser->global.logical_maximum = item_sdata(item);
339 else
340 parser->global.logical_maximum = item_udata(item);
341 return 0;
342
343 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
344 parser->global.physical_minimum = item_sdata(item);
345 return 0;
346
347 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
348 if (parser->global.physical_minimum < 0)
349 parser->global.physical_maximum = item_sdata(item);
350 else
351 parser->global.physical_maximum = item_udata(item);
352 return 0;
353
354 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
355 parser->global.unit_exponent = item_sdata(item);
356 return 0;
357
358 case HID_GLOBAL_ITEM_TAG_UNIT:
359 parser->global.unit = item_udata(item);
360 return 0;
361
362 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
363 parser->global.report_size = item_udata(item);
364 if (parser->global.report_size > 32) {
365 dbg_hid("invalid report_size %d\n",
366 parser->global.report_size);
367 return -1;
368 }
369 return 0;
370
371 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
372 parser->global.report_count = item_udata(item);
373 if (parser->global.report_count > HID_MAX_USAGES) {
374 dbg_hid("invalid report_count %d\n",
375 parser->global.report_count);
376 return -1;
377 }
378 return 0;
379
380 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
381 parser->global.report_id = item_udata(item);
382 if (parser->global.report_id == 0) {
383 dbg_hid("report_id 0 is invalid\n");
384 return -1;
385 }
386 return 0;
387
388 default:
389 dbg_hid("unknown global tag 0x%x\n", item->tag);
390 return -1;
391 }
392}
393
394/*
395 * Process a local item.
396 */
397
398static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
399{
400 __u32 data;
401 unsigned n;
402
403 data = item_udata(item);
404
405 switch (item->tag) {
406 case HID_LOCAL_ITEM_TAG_DELIMITER:
407
408 if (data) {
409 /*
410 * We treat items before the first delimiter
411 * as global to all usage sets (branch 0).
412 * In the moment we process only these global
413 * items and the first delimiter set.
414 */
415 if (parser->local.delimiter_depth != 0) {
416 dbg_hid("nested delimiters\n");
417 return -1;
418 }
419 parser->local.delimiter_depth++;
420 parser->local.delimiter_branch++;
421 } else {
422 if (parser->local.delimiter_depth < 1) {
423 dbg_hid("bogus close delimiter\n");
424 return -1;
425 }
426 parser->local.delimiter_depth--;
427 }
428 return 1;
429
430 case HID_LOCAL_ITEM_TAG_USAGE:
431
432 if (parser->local.delimiter_branch > 1) {
433 dbg_hid("alternative usage ignored\n");
434 return 0;
435 }
436
437 if (item->size <= 2)
438 data = (parser->global.usage_page << 16) + data;
439
440 return hid_add_usage(parser, data);
441
442 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
443
444 if (parser->local.delimiter_branch > 1) {
445 dbg_hid("alternative usage ignored\n");
446 return 0;
447 }
448
449 if (item->size <= 2)
450 data = (parser->global.usage_page << 16) + data;
451
452 parser->local.usage_minimum = data;
453 return 0;
454
455 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
456
457 if (parser->local.delimiter_branch > 1) {
458 dbg_hid("alternative usage ignored\n");
459 return 0;
460 }
461
462 if (item->size <= 2)
463 data = (parser->global.usage_page << 16) + data;
464
465 for (n = parser->local.usage_minimum; n <= data; n++)
466 if (hid_add_usage(parser, n)) {
467 dbg_hid("hid_add_usage failed\n");
468 return -1;
469 }
470 return 0;
471
472 default:
473
474 dbg_hid("unknown local item tag 0x%x\n", item->tag);
475 return 0;
476 }
477 return 0;
478}
479
480/*
481 * Process a main item.
482 */
483
484static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
485{
486 __u32 data;
487 int ret;
488
489 data = item_udata(item);
490
491 switch (item->tag) {
492 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
493 ret = open_collection(parser, data & 0xff);
494 break;
495 case HID_MAIN_ITEM_TAG_END_COLLECTION:
496 ret = close_collection(parser);
497 break;
498 case HID_MAIN_ITEM_TAG_INPUT:
499 ret = hid_add_field(parser, HID_INPUT_REPORT, data);
500 break;
501 case HID_MAIN_ITEM_TAG_OUTPUT:
502 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
503 break;
504 case HID_MAIN_ITEM_TAG_FEATURE:
505 ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
506 break;
507 default:
508 dbg_hid("unknown main item tag 0x%x\n", item->tag);
509 ret = 0;
510 }
511
512 memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */
513
514 return ret;
515}
516
517/*
518 * Process a reserved item.
519 */
520
521static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
522{
523 dbg_hid("reserved item type, tag 0x%x\n", item->tag);
524 return 0;
525}
526
527/*
528 * Free a report and all registered fields. The field->usage and
529 * field->value table's are allocated behind the field, so we need
530 * only to free(field) itself.
531 */
532
533static void hid_free_report(struct hid_report *report)
534{
535 unsigned n;
536
537 for (n = 0; n < report->maxfield; n++)
538 kfree(report->field[n]);
539 kfree(report);
540}
541
542/*
543 * Free a device structure, all reports, and all fields.
544 */
545
546static void hid_device_release(struct device *dev)
547{
548 struct hid_device *device = container_of(dev, struct hid_device, dev);
549 unsigned i, j;
550
551 for (i = 0; i < HID_REPORT_TYPES; i++) {
552 struct hid_report_enum *report_enum = device->report_enum + i;
553
554 for (j = 0; j < 256; j++) {
555 struct hid_report *report = report_enum->report_id_hash[j];
556 if (report)
557 hid_free_report(report);
558 }
559 }
560
561 kfree(device->rdesc);
562 kfree(device->collection);
563 kfree(device);
564}
565
566/*
567 * Fetch a report description item from the data stream. We support long
568 * items, though they are not used yet.
569 */
570
571static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
572{
573 u8 b;
574
575 if ((end - start) <= 0)
576 return NULL;
577
578 b = *start++;
579
580 item->type = (b >> 2) & 3;
581 item->tag = (b >> 4) & 15;
582
583 if (item->tag == HID_ITEM_TAG_LONG) {
584
585 item->format = HID_ITEM_FORMAT_LONG;
586
587 if ((end - start) < 2)
588 return NULL;
589
590 item->size = *start++;
591 item->tag = *start++;
592
593 if ((end - start) < item->size)
594 return NULL;
595
596 item->data.longdata = start;
597 start += item->size;
598 return start;
599 }
600
601 item->format = HID_ITEM_FORMAT_SHORT;
602 item->size = b & 3;
603
604 switch (item->size) {
605 case 0:
606 return start;
607
608 case 1:
609 if ((end - start) < 1)
610 return NULL;
611 item->data.u8 = *start++;
612 return start;
613
614 case 2:
615 if ((end - start) < 2)
616 return NULL;
617 item->data.u16 = get_unaligned_le16(start);
618 start = (__u8 *)((__le16 *)start + 1);
619 return start;
620
621 case 3:
622 item->size++;
623 if ((end - start) < 4)
624 return NULL;
625 item->data.u32 = get_unaligned_le32(start);
626 start = (__u8 *)((__le32 *)start + 1);
627 return start;
628 }
629
630 return NULL;
631}
632
633/**
634 * hid_parse_report - parse device report
635 *
636 * @device: hid device
637 * @start: report start
638 * @size: report size
639 *
640 * Parse a report description into a hid_device structure. Reports are
641 * enumerated, fields are attached to these reports.
642 * 0 returned on success, otherwise nonzero error value.
643 */
644int hid_parse_report(struct hid_device *device, __u8 *start,
645 unsigned size)
646{
647 struct hid_parser *parser;
648 struct hid_item item;
649 __u8 *end;
650 int ret;
651 static int (*dispatch_type[])(struct hid_parser *parser,
652 struct hid_item *item) = {
653 hid_parser_main,
654 hid_parser_global,
655 hid_parser_local,
656 hid_parser_reserved
657 };
658
659 if (device->driver->report_fixup)
660 start = device->driver->report_fixup(device, start, &size);
661
662 device->rdesc = kmemdup(start, size, GFP_KERNEL);
663 if (device->rdesc == NULL)
664 return -ENOMEM;
665 device->rsize = size;
666
667 parser = vzalloc(sizeof(struct hid_parser));
668 if (!parser) {
669 ret = -ENOMEM;
670 goto err;
671 }
672
673 parser->device = device;
674
675 end = start + size;
676 ret = -EINVAL;
677 while ((start = fetch_item(start, end, &item)) != NULL) {
678
679 if (item.format != HID_ITEM_FORMAT_SHORT) {
680 dbg_hid("unexpected long global item\n");
681 goto err;
682 }
683
684 if (dispatch_type[item.type](parser, &item)) {
685 dbg_hid("item %u %u %u %u parsing failed\n",
686 item.format, (unsigned)item.size,
687 (unsigned)item.type, (unsigned)item.tag);
688 goto err;
689 }
690
691 if (start == end) {
692 if (parser->collection_stack_ptr) {
693 dbg_hid("unbalanced collection at end of report description\n");
694 goto err;
695 }
696 if (parser->local.delimiter_depth) {
697 dbg_hid("unbalanced delimiter at end of report description\n");
698 goto err;
699 }
700 vfree(parser);
701 return 0;
702 }
703 }
704
705 dbg_hid("item fetching failed at offset %d\n", (int)(end - start));
706err:
707 vfree(parser);
708 return ret;
709}
710EXPORT_SYMBOL_GPL(hid_parse_report);
711
712/*
713 * Convert a signed n-bit integer to signed 32-bit integer. Common
714 * cases are done through the compiler, the screwed things has to be
715 * done by hand.
716 */
717
718static s32 snto32(__u32 value, unsigned n)
719{
720 switch (n) {
721 case 8: return ((__s8)value);
722 case 16: return ((__s16)value);
723 case 32: return ((__s32)value);
724 }
725 return value & (1 << (n - 1)) ? value | (-1 << n) : value;
726}
727
728/*
729 * Convert a signed 32-bit integer to a signed n-bit integer.
730 */
731
732static u32 s32ton(__s32 value, unsigned n)
733{
734 s32 a = value >> (n - 1);
735 if (a && a != -1)
736 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
737 return value & ((1 << n) - 1);
738}
739
740/*
741 * Extract/implement a data field from/to a little endian report (bit array).
742 *
743 * Code sort-of follows HID spec:
744 * http://www.usb.org/developers/devclass_docs/HID1_11.pdf
745 *
746 * While the USB HID spec allows unlimited length bit fields in "report
747 * descriptors", most devices never use more than 16 bits.
748 * One model of UPS is claimed to report "LINEV" as a 32-bit field.
749 * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
750 */
751
752static __u32 extract(const struct hid_device *hid, __u8 *report,
753 unsigned offset, unsigned n)
754{
755 u64 x;
756
757 if (n > 32)
758 hid_warn(hid, "extract() called with n (%d) > 32! (%s)\n",
759 n, current->comm);
760
761 report += offset >> 3; /* adjust byte index */
762 offset &= 7; /* now only need bit offset into one byte */
763 x = get_unaligned_le64(report);
764 x = (x >> offset) & ((1ULL << n) - 1); /* extract bit field */
765 return (u32) x;
766}
767
768/*
769 * "implement" : set bits in a little endian bit stream.
770 * Same concepts as "extract" (see comments above).
771 * The data mangled in the bit stream remains in little endian
772 * order the whole time. It make more sense to talk about
773 * endianness of register values by considering a register
774 * a "cached" copy of the little endiad bit stream.
775 */
776static void implement(const struct hid_device *hid, __u8 *report,
777 unsigned offset, unsigned n, __u32 value)
778{
779 u64 x;
780 u64 m = (1ULL << n) - 1;
781
782 if (n > 32)
783 hid_warn(hid, "%s() called with n (%d) > 32! (%s)\n",
784 __func__, n, current->comm);
785
786 if (value > m)
787 hid_warn(hid, "%s() called with too large value %d! (%s)\n",
788 __func__, value, current->comm);
789 WARN_ON(value > m);
790 value &= m;
791
792 report += offset >> 3;
793 offset &= 7;
794
795 x = get_unaligned_le64(report);
796 x &= ~(m << offset);
797 x |= ((u64)value) << offset;
798 put_unaligned_le64(x, report);
799}
800
801/*
802 * Search an array for a value.
803 */
804
805static int search(__s32 *array, __s32 value, unsigned n)
806{
807 while (n--) {
808 if (*array++ == value)
809 return 0;
810 }
811 return -1;
812}
813
814/**
815 * hid_match_report - check if driver's raw_event should be called
816 *
817 * @hid: hid device
818 * @report_type: type to match against
819 *
820 * compare hid->driver->report_table->report_type to report->type
821 */
822static int hid_match_report(struct hid_device *hid, struct hid_report *report)
823{
824 const struct hid_report_id *id = hid->driver->report_table;
825
826 if (!id) /* NULL means all */
827 return 1;
828
829 for (; id->report_type != HID_TERMINATOR; id++)
830 if (id->report_type == HID_ANY_ID ||
831 id->report_type == report->type)
832 return 1;
833 return 0;
834}
835
836/**
837 * hid_match_usage - check if driver's event should be called
838 *
839 * @hid: hid device
840 * @usage: usage to match against
841 *
842 * compare hid->driver->usage_table->usage_{type,code} to
843 * usage->usage_{type,code}
844 */
845static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
846{
847 const struct hid_usage_id *id = hid->driver->usage_table;
848
849 if (!id) /* NULL means all */
850 return 1;
851
852 for (; id->usage_type != HID_ANY_ID - 1; id++)
853 if ((id->usage_hid == HID_ANY_ID ||
854 id->usage_hid == usage->hid) &&
855 (id->usage_type == HID_ANY_ID ||
856 id->usage_type == usage->type) &&
857 (id->usage_code == HID_ANY_ID ||
858 id->usage_code == usage->code))
859 return 1;
860 return 0;
861}
862
863static void hid_process_event(struct hid_device *hid, struct hid_field *field,
864 struct hid_usage *usage, __s32 value, int interrupt)
865{
866 struct hid_driver *hdrv = hid->driver;
867 int ret;
868
869 hid_dump_input(hid, usage, value);
870
871 if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
872 ret = hdrv->event(hid, field, usage, value);
873 if (ret != 0) {
874 if (ret < 0)
875 dbg_hid("%s's event failed with %d\n",
876 hdrv->name, ret);
877 return;
878 }
879 }
880
881 if (hid->claimed & HID_CLAIMED_INPUT)
882 hidinput_hid_event(hid, field, usage, value);
883 if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
884 hid->hiddev_hid_event(hid, field, usage, value);
885}
886
887/*
888 * Analyse a received field, and fetch the data from it. The field
889 * content is stored for next report processing (we do differential
890 * reporting to the layer).
891 */
892
893static void hid_input_field(struct hid_device *hid, struct hid_field *field,
894 __u8 *data, int interrupt)
895{
896 unsigned n;
897 unsigned count = field->report_count;
898 unsigned offset = field->report_offset;
899 unsigned size = field->report_size;
900 __s32 min = field->logical_minimum;
901 __s32 max = field->logical_maximum;
902 __s32 *value;
903
904 value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC);
905 if (!value)
906 return;
907
908 for (n = 0; n < count; n++) {
909
910 value[n] = min < 0 ?
911 snto32(extract(hid, data, offset + n * size, size),
912 size) :
913 extract(hid, data, offset + n * size, size);
914
915 /* Ignore report if ErrorRollOver */
916 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
917 value[n] >= min && value[n] <= max &&
918 field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
919 goto exit;
920 }
921
922 for (n = 0; n < count; n++) {
923
924 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
925 hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
926 continue;
927 }
928
929 if (field->value[n] >= min && field->value[n] <= max
930 && field->usage[field->value[n] - min].hid
931 && search(value, field->value[n], count))
932 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
933
934 if (value[n] >= min && value[n] <= max
935 && field->usage[value[n] - min].hid
936 && search(field->value, value[n], count))
937 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
938 }
939
940 memcpy(field->value, value, count * sizeof(__s32));
941exit:
942 kfree(value);
943}
944
945/*
946 * Output the field into the report.
947 */
948
949static void hid_output_field(const struct hid_device *hid,
950 struct hid_field *field, __u8 *data)
951{
952 unsigned count = field->report_count;
953 unsigned offset = field->report_offset;
954 unsigned size = field->report_size;
955 unsigned n;
956
957 for (n = 0; n < count; n++) {
958 if (field->logical_minimum < 0) /* signed values */
959 implement(hid, data, offset + n * size, size,
960 s32ton(field->value[n], size));
961 else /* unsigned values */
962 implement(hid, data, offset + n * size, size,
963 field->value[n]);
964 }
965}
966
967/*
968 * Create a report.
969 */
970
971void hid_output_report(struct hid_report *report, __u8 *data)
972{
973 unsigned n;
974
975 if (report->id > 0)
976 *data++ = report->id;
977
978 memset(data, 0, ((report->size - 1) >> 3) + 1);
979 for (n = 0; n < report->maxfield; n++)
980 hid_output_field(report->device, report->field[n], data);
981}
982EXPORT_SYMBOL_GPL(hid_output_report);
983
984/*
985 * Set a field value. The report this field belongs to has to be
986 * created and transferred to the device, to set this value in the
987 * device.
988 */
989
990int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
991{
992 unsigned size = field->report_size;
993
994 hid_dump_input(field->report->device, field->usage + offset, value);
995
996 if (offset >= field->report_count) {
997 dbg_hid("offset (%d) exceeds report_count (%d)\n", offset, field->report_count);
998 return -1;
999 }
1000 if (field->logical_minimum < 0) {
1001 if (value != snto32(s32ton(value, size), size)) {
1002 dbg_hid("value %d is out of range\n", value);
1003 return -1;
1004 }
1005 }
1006 field->value[offset] = value;
1007 return 0;
1008}
1009EXPORT_SYMBOL_GPL(hid_set_field);
1010
1011static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1012 const u8 *data)
1013{
1014 struct hid_report *report;
1015 unsigned int n = 0; /* Normally report number is 0 */
1016
1017 /* Device uses numbered reports, data[0] is report number */
1018 if (report_enum->numbered)
1019 n = *data;
1020
1021 report = report_enum->report_id_hash[n];
1022 if (report == NULL)
1023 dbg_hid("undefined report_id %u received\n", n);
1024
1025 return report;
1026}
1027
1028void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1029 int interrupt)
1030{
1031 struct hid_report_enum *report_enum = hid->report_enum + type;
1032 struct hid_report *report;
1033 unsigned int a;
1034 int rsize, csize = size;
1035 u8 *cdata = data;
1036
1037 report = hid_get_report(report_enum, data);
1038 if (!report)
1039 return;
1040
1041 if (report_enum->numbered) {
1042 cdata++;
1043 csize--;
1044 }
1045
1046 rsize = ((report->size - 1) >> 3) + 1;
1047
1048 if (rsize > HID_MAX_BUFFER_SIZE)
1049 rsize = HID_MAX_BUFFER_SIZE;
1050
1051 if (csize < rsize) {
1052 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1053 csize, rsize);
1054 memset(cdata + csize, 0, rsize - csize);
1055 }
1056
1057 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1058 hid->hiddev_report_event(hid, report);
1059 if (hid->claimed & HID_CLAIMED_HIDRAW)
1060 hidraw_report_event(hid, data, size);
1061
1062 for (a = 0; a < report->maxfield; a++)
1063 hid_input_field(hid, report->field[a], cdata, interrupt);
1064
1065 if (hid->claimed & HID_CLAIMED_INPUT)
1066 hidinput_report_event(hid, report);
1067}
1068EXPORT_SYMBOL_GPL(hid_report_raw_event);
1069
1070/**
1071 * hid_input_report - report data from lower layer (usb, bt...)
1072 *
1073 * @hid: hid device
1074 * @type: HID report type (HID_*_REPORT)
1075 * @data: report contents
1076 * @size: size of data parameter
1077 * @interrupt: distinguish between interrupt and control transfers
1078 *
1079 * This is data entry for lower layers.
1080 */
1081int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
1082{
1083 struct hid_report_enum *report_enum;
1084 struct hid_driver *hdrv;
1085 struct hid_report *report;
1086 char *buf;
1087 unsigned int i;
1088 int ret;
1089
1090 if (!hid || !hid->driver)
1091 return -ENODEV;
1092 report_enum = hid->report_enum + type;
1093 hdrv = hid->driver;
1094
1095 if (!size) {
1096 dbg_hid("empty report\n");
1097 return -1;
1098 }
1099
1100 buf = kmalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_ATOMIC);
1101
1102 if (!buf)
1103 goto nomem;
1104
1105 /* dump the report */
1106 snprintf(buf, HID_DEBUG_BUFSIZE - 1,
1107 "\nreport (size %u) (%snumbered) = ", size, report_enum->numbered ? "" : "un");
1108 hid_debug_event(hid, buf);
1109
1110 for (i = 0; i < size; i++) {
1111 snprintf(buf, HID_DEBUG_BUFSIZE - 1,
1112 " %02x", data[i]);
1113 hid_debug_event(hid, buf);
1114 }
1115 hid_debug_event(hid, "\n");
1116 kfree(buf);
1117
1118nomem:
1119 report = hid_get_report(report_enum, data);
1120
1121 if (!report)
1122 return -1;
1123
1124 if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1125 ret = hdrv->raw_event(hid, report, data, size);
1126 if (ret != 0)
1127 return ret < 0 ? ret : 0;
1128 }
1129
1130 hid_report_raw_event(hid, type, data, size, interrupt);
1131
1132 return 0;
1133}
1134EXPORT_SYMBOL_GPL(hid_input_report);
1135
1136static bool hid_match_one_id(struct hid_device *hdev,
1137 const struct hid_device_id *id)
1138{
1139 return id->bus == hdev->bus &&
1140 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1141 (id->product == HID_ANY_ID || id->product == hdev->product);
1142}
1143
1144static const struct hid_device_id *hid_match_id(struct hid_device *hdev,
1145 const struct hid_device_id *id)
1146{
1147 for (; id->bus; id++)
1148 if (hid_match_one_id(hdev, id))
1149 return id;
1150
1151 return NULL;
1152}
1153
1154static const struct hid_device_id hid_hiddev_list[] = {
1155 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1156 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1157 { }
1158};
1159
1160static bool hid_hiddev(struct hid_device *hdev)
1161{
1162 return !!hid_match_id(hdev, hid_hiddev_list);
1163}
1164
1165
1166static ssize_t
1167read_report_descriptor(struct file *filp, struct kobject *kobj,
1168 struct bin_attribute *attr,
1169 char *buf, loff_t off, size_t count)
1170{
1171 struct device *dev = container_of(kobj, struct device, kobj);
1172 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1173
1174 if (off >= hdev->rsize)
1175 return 0;
1176
1177 if (off + count > hdev->rsize)
1178 count = hdev->rsize - off;
1179
1180 memcpy(buf, hdev->rdesc + off, count);
1181
1182 return count;
1183}
1184
1185static struct bin_attribute dev_bin_attr_report_desc = {
1186 .attr = { .name = "report_descriptor", .mode = 0444 },
1187 .read = read_report_descriptor,
1188 .size = HID_MAX_DESCRIPTOR_SIZE,
1189};
1190
1191int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1192{
1193 static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1194 "Joystick", "Gamepad", "Keyboard", "Keypad",
1195 "Multi-Axis Controller"
1196 };
1197 const char *type, *bus;
1198 char buf[64];
1199 unsigned int i;
1200 int len;
1201 int ret;
1202
1203 if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
1204 connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
1205 if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
1206 connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
1207 if (hdev->bus != BUS_USB)
1208 connect_mask &= ~HID_CONNECT_HIDDEV;
1209 if (hid_hiddev(hdev))
1210 connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1211
1212 if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1213 connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1214 hdev->claimed |= HID_CLAIMED_INPUT;
1215 if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1216 !hdev->hiddev_connect(hdev,
1217 connect_mask & HID_CONNECT_HIDDEV_FORCE))
1218 hdev->claimed |= HID_CLAIMED_HIDDEV;
1219 if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1220 hdev->claimed |= HID_CLAIMED_HIDRAW;
1221
1222 if (!hdev->claimed) {
1223 hid_err(hdev, "claimed by neither input, hiddev nor hidraw\n");
1224 return -ENODEV;
1225 }
1226
1227 if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1228 (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1229 hdev->ff_init(hdev);
1230
1231 len = 0;
1232 if (hdev->claimed & HID_CLAIMED_INPUT)
1233 len += sprintf(buf + len, "input");
1234 if (hdev->claimed & HID_CLAIMED_HIDDEV)
1235 len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1236 hdev->minor);
1237 if (hdev->claimed & HID_CLAIMED_HIDRAW)
1238 len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1239 ((struct hidraw *)hdev->hidraw)->minor);
1240
1241 type = "Device";
1242 for (i = 0; i < hdev->maxcollection; i++) {
1243 struct hid_collection *col = &hdev->collection[i];
1244 if (col->type == HID_COLLECTION_APPLICATION &&
1245 (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1246 (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1247 type = types[col->usage & 0xffff];
1248 break;
1249 }
1250 }
1251
1252 switch (hdev->bus) {
1253 case BUS_USB:
1254 bus = "USB";
1255 break;
1256 case BUS_BLUETOOTH:
1257 bus = "BLUETOOTH";
1258 break;
1259 default:
1260 bus = "<UNKNOWN>";
1261 }
1262
1263 ret = device_create_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1264 if (ret)
1265 hid_warn(hdev,
1266 "can't create sysfs report descriptor attribute err: %d\n", ret);
1267
1268 hid_info(hdev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1269 buf, bus, hdev->version >> 8, hdev->version & 0xff,
1270 type, hdev->name, hdev->phys);
1271
1272 return 0;
1273}
1274EXPORT_SYMBOL_GPL(hid_connect);
1275
1276void hid_disconnect(struct hid_device *hdev)
1277{
1278 device_remove_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1279 if (hdev->claimed & HID_CLAIMED_INPUT)
1280 hidinput_disconnect(hdev);
1281 if (hdev->claimed & HID_CLAIMED_HIDDEV)
1282 hdev->hiddev_disconnect(hdev);
1283 if (hdev->claimed & HID_CLAIMED_HIDRAW)
1284 hidraw_disconnect(hdev);
1285}
1286EXPORT_SYMBOL_GPL(hid_disconnect);
1287
1288/* a list of devices for which there is a specialized driver on HID bus */
1289static const struct hid_device_id hid_have_special_driver[] = {
1290 { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
1291 { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
1292 { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
1293 { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
1294 { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
1295 { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
1296 { HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR, USB_DEVICE_ID_ACTIONSTAR_1011) },
1297 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
1298 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
1299 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
1300 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
1301 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
1302 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1303 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1304 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1305 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1306 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1307 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1308 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1309 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1310 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1311 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1312 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1313 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
1314 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
1315 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
1316 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
1317 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
1318 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
1319 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1320 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1321 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1322 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
1323 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
1324 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
1325 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1326 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1327 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1328 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1329 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1330 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1331 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1332 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1333 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1334 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1335 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1336 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1337 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1338 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1339 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1340 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1341 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1342 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1343 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ANSI) },
1344 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ISO) },
1345 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_JIS) },
1346 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI) },
1347 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO) },
1348 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_JIS) },
1349 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1350 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1351 { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT) },
1352 { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1353 { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
1354 { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
1355 { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
1356 { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1357 { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1358 { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
1359 { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
1360 { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1361 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
1362 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
1363 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
1364 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
1365 { HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT, USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1366 { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
1367 { HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH, USB_DEVICE_ID_CVTOUCH_SCREEN) },
1368 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
1369 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
1370 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
1371 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
1372 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
1373 { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
1374 { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011) },
1375 { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
1376 { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
1377 { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
1378 { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
1379 { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
1380 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
1381 { HID_USB_DEVICE(USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2515) },
1382 { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
1383 { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
1384 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
1385 { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
1386 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1387 { HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH, USB_DEVICE_ID_GOODTOUCH_000f) },
1388 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
1389 { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
1390 { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
1391 { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
1392 { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
1393 { HID_USB_DEVICE(USB_VENDOR_ID_HANVON, USB_DEVICE_ID_HANVON_MULTITOUCH) },
1394 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
1395 { HID_USB_DEVICE(USB_VENDOR_ID_ILITEK, USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1396 { HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS, USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
1397 { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
1398 { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
1399 { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
1400 { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
1401 { HID_USB_DEVICE(USB_VENDOR_ID_LCPOWER, USB_DEVICE_ID_LCPOWER_LC1000 ) },
1402 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
1403 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
1404 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
1405 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
1406 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
1407 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
1408 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
1409 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
1410 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
1411 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
1412 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
1413 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD_CORD) },
1414 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
1415 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
1416 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
1417 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_FFG ) },
1418 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
1419 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FLIGHT_SYSTEM_G940) },
1420 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
1421 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
1422 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DFP_WHEEL) },
1423 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
1424 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G27_WHEEL) },
1425 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WII_WHEEL) },
1426 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
1427 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
1428 { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
1429 { HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, USB_DEVICE_ID_CRYSTALTOUCH) },
1430 { HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
1431 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
1432 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
1433 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_COMFORT_MOUSE_4500) },
1434 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
1435 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
1436 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
1437 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
1438 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_DIGITAL_MEDIA_3K) },
1439 { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
1440 { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
1441 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
1442 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1) },
1443 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2) },
1444 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3) },
1445 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4) },
1446 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5) },
1447 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6) },
1448 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7) },
1449 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8) },
1450 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9) },
1451 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10) },
1452 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11) },
1453 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12) },
1454 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13) },
1455 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14) },
1456 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15) },
1457 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16) },
1458 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17) },
1459 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
1460 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
1461 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
1462 { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_PCI) },
1463 { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
1464 { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1465 { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },
1466 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
1467 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
1468 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPLUS) },
1469 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
1470 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
1471 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
1472 { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
1473 { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
1474 { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
1475 { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1476 { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_NAVIGATION_CONTROLLER) },
1477 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1478 { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
1479 { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) },
1480 { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, USB_DEVICE_ID_MTP_STM) },
1481 { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX, USB_DEVICE_ID_MTP_SITRONIX) },
1482 { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
1483 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
1484 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
1485 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323) },
1486 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324) },
1487 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
1488 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653) },
1489 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
1490 { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a) },
1491 { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
1492 { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, USB_DEVICE_ID_TOPSEED2_RF_COMBO) },
1493 { HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL, USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1494 { HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
1495 { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1496 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
1497 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
1498 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
1499 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
1500 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
1501 { HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1502 { HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1503 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
1504 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
1505 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
1506 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
1507 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
1508 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
1509 { HID_USB_DEVICE(USB_VENDOR_ID_XAT, USB_DEVICE_ID_XAT_CSR) },
1510 { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE) },
1511 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
1512 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
1513 { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
1514
1515 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
1516 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1517 { }
1518};
1519
1520struct hid_dynid {
1521 struct list_head list;
1522 struct hid_device_id id;
1523};
1524
1525/**
1526 * store_new_id - add a new HID device ID to this driver and re-probe devices
1527 * @driver: target device driver
1528 * @buf: buffer for scanning device ID data
1529 * @count: input size
1530 *
1531 * Adds a new dynamic hid device ID to this driver,
1532 * and causes the driver to probe for all devices again.
1533 */
1534static ssize_t store_new_id(struct device_driver *drv, const char *buf,
1535 size_t count)
1536{
1537 struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1538 struct hid_dynid *dynid;
1539 __u32 bus, vendor, product;
1540 unsigned long driver_data = 0;
1541 int ret;
1542
1543 ret = sscanf(buf, "%x %x %x %lx",
1544 &bus, &vendor, &product, &driver_data);
1545 if (ret < 3)
1546 return -EINVAL;
1547
1548 dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1549 if (!dynid)
1550 return -ENOMEM;
1551
1552 dynid->id.bus = bus;
1553 dynid->id.vendor = vendor;
1554 dynid->id.product = product;
1555 dynid->id.driver_data = driver_data;
1556
1557 spin_lock(&hdrv->dyn_lock);
1558 list_add_tail(&dynid->list, &hdrv->dyn_list);
1559 spin_unlock(&hdrv->dyn_lock);
1560
1561 ret = 0;
1562 if (get_driver(&hdrv->driver)) {
1563 ret = driver_attach(&hdrv->driver);
1564 put_driver(&hdrv->driver);
1565 }
1566
1567 return ret ? : count;
1568}
1569static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
1570
1571static void hid_free_dynids(struct hid_driver *hdrv)
1572{
1573 struct hid_dynid *dynid, *n;
1574
1575 spin_lock(&hdrv->dyn_lock);
1576 list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1577 list_del(&dynid->list);
1578 kfree(dynid);
1579 }
1580 spin_unlock(&hdrv->dyn_lock);
1581}
1582
1583static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1584 struct hid_driver *hdrv)
1585{
1586 struct hid_dynid *dynid;
1587
1588 spin_lock(&hdrv->dyn_lock);
1589 list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1590 if (hid_match_one_id(hdev, &dynid->id)) {
1591 spin_unlock(&hdrv->dyn_lock);
1592 return &dynid->id;
1593 }
1594 }
1595 spin_unlock(&hdrv->dyn_lock);
1596
1597 return hid_match_id(hdev, hdrv->id_table);
1598}
1599
1600static int hid_bus_match(struct device *dev, struct device_driver *drv)
1601{
1602 struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1603 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1604
1605 if (!hid_match_device(hdev, hdrv))
1606 return 0;
1607
1608 /* generic wants all that don't have specialized driver */
1609 if (!strncmp(hdrv->name, "generic-", 8))
1610 return !hid_match_id(hdev, hid_have_special_driver);
1611
1612 return 1;
1613}
1614
1615static int hid_device_probe(struct device *dev)
1616{
1617 struct hid_driver *hdrv = container_of(dev->driver,
1618 struct hid_driver, driver);
1619 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1620 const struct hid_device_id *id;
1621 int ret = 0;
1622
1623 if (!hdev->driver) {
1624 id = hid_match_device(hdev, hdrv);
1625 if (id == NULL)
1626 return -ENODEV;
1627
1628 hdev->driver = hdrv;
1629 if (hdrv->probe) {
1630 ret = hdrv->probe(hdev, id);
1631 } else { /* default probe */
1632 ret = hid_parse(hdev);
1633 if (!ret)
1634 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1635 }
1636 if (ret)
1637 hdev->driver = NULL;
1638 }
1639 return ret;
1640}
1641
1642static int hid_device_remove(struct device *dev)
1643{
1644 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1645 struct hid_driver *hdrv = hdev->driver;
1646
1647 if (hdrv) {
1648 if (hdrv->remove)
1649 hdrv->remove(hdev);
1650 else /* default remove */
1651 hid_hw_stop(hdev);
1652 hdev->driver = NULL;
1653 }
1654
1655 return 0;
1656}
1657
1658static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
1659{
1660 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1661
1662 if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
1663 hdev->bus, hdev->vendor, hdev->product))
1664 return -ENOMEM;
1665
1666 if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
1667 return -ENOMEM;
1668
1669 if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
1670 return -ENOMEM;
1671
1672 if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
1673 return -ENOMEM;
1674
1675 if (add_uevent_var(env, "MODALIAS=hid:b%04Xv%08Xp%08X",
1676 hdev->bus, hdev->vendor, hdev->product))
1677 return -ENOMEM;
1678
1679 return 0;
1680}
1681
1682static struct bus_type hid_bus_type = {
1683 .name = "hid",
1684 .match = hid_bus_match,
1685 .probe = hid_device_probe,
1686 .remove = hid_device_remove,
1687 .uevent = hid_uevent,
1688};
1689
1690/* a list of devices that shouldn't be handled by HID core at all */
1691static const struct hid_device_id hid_ignore_list[] = {
1692 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
1693 { HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
1694 { HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
1695 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
1696 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
1697 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
1698 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
1699 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
1700 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
1701 { HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
1702 { HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
1703 { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
1704 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
1705 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
1706 { HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
1707 { HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
1708 { HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
1709 { HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
1710 { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
1711 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
1712 { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
1713 { HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
1714 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
1715 { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
1716 { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
1717 { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
1718 { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
1719 { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
1720 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
1721 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) },
1722 { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
1723 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
1724 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
1725 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
1726 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
1727 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
1728 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
1729 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
1730 { HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
1731 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
1732 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
1733 { HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
1734 { HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
1735 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
1736 { HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
1737 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
1738 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
1739 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
1740 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
1741 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
1742 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
1743 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
1744 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
1745 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
1746 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
1747 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
1748 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
1749 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
1750 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
1751 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
1752 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
1753 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
1754 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
1755 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
1756 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
1757 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
1758 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
1759 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
1760 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
1761 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
1762 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
1763 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
1764 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
1765 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
1766 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
1767 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
1768 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
1769 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
1770 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
1771 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
1772 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
1773 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
1774 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
1775 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
1776 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
1777 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
1778 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
1779 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
1780 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
1781 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
1782 { HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
1783 { HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
1784 { HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
1785 { HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
1786 { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
1787 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_KYE, 0x0058) },
1788 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
1789 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY2) },
1790 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
1791 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY2) },
1792 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
1793 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY2) },
1794 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYVOLTAGE) },
1795 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYCURRENT) },
1796 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTIME) },
1797 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTEMPERATURE) },
1798 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYPH) },
1799 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
1800 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
1801 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
1802 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIC) },
1803 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIB) },
1804 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY) },
1805 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
1806 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
1807 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOTOR) },
1808 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
1809 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
1810 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
1811 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
1812 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
1813 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER) },
1814 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER2) },
1815 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_ABSESP) },
1816 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_AUTODATABUS) },
1817 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MCT) },
1818 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HYBRID) },
1819 { HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HEATCONTROL) },
1820 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
1821 { HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
1822 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
1823 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
1824 { HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
1825 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
1826 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
1827 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
1828 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
1829 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
1830 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
1831 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
1832 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
1833 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
1834 { HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
1835 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
1836 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
1837 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
1838 { HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
1839 { HID_USB_DEVICE(USB_VENDOR_ID_PHILIPS, USB_DEVICE_ID_PHILIPS_IEEE802154_DONGLE) },
1840 { HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
1841 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
1842 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
1843 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
1844 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
1845 { HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
1846 { HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
1847 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
1848 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
1849 { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
1850 { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
1851 { }
1852};
1853
1854/**
1855 * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
1856 *
1857 * There are composite devices for which we want to ignore only a certain
1858 * interface. This is a list of devices for which only the mouse interface will
1859 * be ignored. This allows a dedicated driver to take care of the interface.
1860 */
1861static const struct hid_device_id hid_mouse_ignore_list[] = {
1862 /* appletouch driver */
1863 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1864 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1865 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1866 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1867 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1868 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1869 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1870 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1871 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1872 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1873 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1874 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1875 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1876 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1877 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1878 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1879 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1880 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1881 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1882 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1883 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1884 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1885 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1886 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1887 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1888 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1889 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1890 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1891 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1892 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1893 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1894 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1895 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1896 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1897 { }
1898};
1899
1900static bool hid_ignore(struct hid_device *hdev)
1901{
1902 switch (hdev->vendor) {
1903 case USB_VENDOR_ID_CODEMERCS:
1904 /* ignore all Code Mercenaries IOWarrior devices */
1905 if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
1906 hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
1907 return true;
1908 break;
1909 case USB_VENDOR_ID_LOGITECH:
1910 if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
1911 hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
1912 return true;
1913 break;
1914 case USB_VENDOR_ID_SOUNDGRAPH:
1915 if (hdev->product >= USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST &&
1916 hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
1917 return true;
1918 break;
1919 case USB_VENDOR_ID_HANWANG:
1920 if (hdev->product >= USB_DEVICE_ID_HANWANG_TABLET_FIRST &&
1921 hdev->product <= USB_DEVICE_ID_HANWANG_TABLET_LAST)
1922 return true;
1923 break;
1924 case USB_VENDOR_ID_JESS:
1925 if (hdev->product == USB_DEVICE_ID_JESS_YUREX &&
1926 hdev->type == HID_TYPE_USBNONE)
1927 return true;
1928 break;
1929 }
1930
1931 if (hdev->type == HID_TYPE_USBMOUSE &&
1932 hid_match_id(hdev, hid_mouse_ignore_list))
1933 return true;
1934
1935 return !!hid_match_id(hdev, hid_ignore_list);
1936}
1937
1938int hid_add_device(struct hid_device *hdev)
1939{
1940 static atomic_t id = ATOMIC_INIT(0);
1941 int ret;
1942
1943 if (WARN_ON(hdev->status & HID_STAT_ADDED))
1944 return -EBUSY;
1945
1946 /* we need to kill them here, otherwise they will stay allocated to
1947 * wait for coming driver */
1948 if (!(hdev->quirks & HID_QUIRK_NO_IGNORE)
1949 && (hid_ignore(hdev) || (hdev->quirks & HID_QUIRK_IGNORE)))
1950 return -ENODEV;
1951
1952 /* XXX hack, any other cleaner solution after the driver core
1953 * is converted to allow more than 20 bytes as the device name? */
1954 dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
1955 hdev->vendor, hdev->product, atomic_inc_return(&id));
1956
1957 hid_debug_register(hdev, dev_name(&hdev->dev));
1958 ret = device_add(&hdev->dev);
1959 if (!ret)
1960 hdev->status |= HID_STAT_ADDED;
1961 else
1962 hid_debug_unregister(hdev);
1963
1964 return ret;
1965}
1966EXPORT_SYMBOL_GPL(hid_add_device);
1967
1968/**
1969 * hid_allocate_device - allocate new hid device descriptor
1970 *
1971 * Allocate and initialize hid device, so that hid_destroy_device might be
1972 * used to free it.
1973 *
1974 * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
1975 * error value.
1976 */
1977struct hid_device *hid_allocate_device(void)
1978{
1979 struct hid_device *hdev;
1980 unsigned int i;
1981 int ret = -ENOMEM;
1982
1983 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
1984 if (hdev == NULL)
1985 return ERR_PTR(ret);
1986
1987 device_initialize(&hdev->dev);
1988 hdev->dev.release = hid_device_release;
1989 hdev->dev.bus = &hid_bus_type;
1990
1991 hdev->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
1992 sizeof(struct hid_collection), GFP_KERNEL);
1993 if (hdev->collection == NULL)
1994 goto err;
1995 hdev->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
1996
1997 for (i = 0; i < HID_REPORT_TYPES; i++)
1998 INIT_LIST_HEAD(&hdev->report_enum[i].report_list);
1999
2000 init_waitqueue_head(&hdev->debug_wait);
2001 INIT_LIST_HEAD(&hdev->debug_list);
2002
2003 return hdev;
2004err:
2005 put_device(&hdev->dev);
2006 return ERR_PTR(ret);
2007}
2008EXPORT_SYMBOL_GPL(hid_allocate_device);
2009
2010static void hid_remove_device(struct hid_device *hdev)
2011{
2012 if (hdev->status & HID_STAT_ADDED) {
2013 device_del(&hdev->dev);
2014 hid_debug_unregister(hdev);
2015 hdev->status &= ~HID_STAT_ADDED;
2016 }
2017}
2018
2019/**
2020 * hid_destroy_device - free previously allocated device
2021 *
2022 * @hdev: hid device
2023 *
2024 * If you allocate hid_device through hid_allocate_device, you should ever
2025 * free by this function.
2026 */
2027void hid_destroy_device(struct hid_device *hdev)
2028{
2029 hid_remove_device(hdev);
2030 put_device(&hdev->dev);
2031}
2032EXPORT_SYMBOL_GPL(hid_destroy_device);
2033
2034int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
2035 const char *mod_name)
2036{
2037 int ret;
2038
2039 hdrv->driver.name = hdrv->name;
2040 hdrv->driver.bus = &hid_bus_type;
2041 hdrv->driver.owner = owner;
2042 hdrv->driver.mod_name = mod_name;
2043
2044 INIT_LIST_HEAD(&hdrv->dyn_list);
2045 spin_lock_init(&hdrv->dyn_lock);
2046
2047 ret = driver_register(&hdrv->driver);
2048 if (ret)
2049 return ret;
2050
2051 ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
2052 if (ret)
2053 driver_unregister(&hdrv->driver);
2054
2055 return ret;
2056}
2057EXPORT_SYMBOL_GPL(__hid_register_driver);
2058
2059void hid_unregister_driver(struct hid_driver *hdrv)
2060{
2061 driver_remove_file(&hdrv->driver, &driver_attr_new_id);
2062 driver_unregister(&hdrv->driver);
2063 hid_free_dynids(hdrv);
2064}
2065EXPORT_SYMBOL_GPL(hid_unregister_driver);
2066
2067int hid_check_keys_pressed(struct hid_device *hid)
2068{
2069 struct hid_input *hidinput;
2070 int i;
2071
2072 if (!(hid->claimed & HID_CLAIMED_INPUT))
2073 return 0;
2074
2075 list_for_each_entry(hidinput, &hid->inputs, list) {
2076 for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
2077 if (hidinput->input->key[i])
2078 return 1;
2079 }
2080
2081 return 0;
2082}
2083
2084EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
2085
2086static int __init hid_init(void)
2087{
2088 int ret;
2089
2090 if (hid_debug)
2091 pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
2092 "debugfs is now used for inspecting the device (report descriptor, reports)\n");
2093
2094 ret = bus_register(&hid_bus_type);
2095 if (ret) {
2096 pr_err("can't register hid bus\n");
2097 goto err;
2098 }
2099
2100 ret = hidraw_init();
2101 if (ret)
2102 goto err_bus;
2103
2104 hid_debug_init();
2105
2106 return 0;
2107err_bus:
2108 bus_unregister(&hid_bus_type);
2109err:
2110 return ret;
2111}
2112
2113static void __exit hid_exit(void)
2114{
2115 hid_debug_exit();
2116 hidraw_exit();
2117 bus_unregister(&hid_bus_type);
2118}
2119
2120module_init(hid_init);
2121module_exit(hid_exit);
2122
2123MODULE_AUTHOR("Andreas Gal");
2124MODULE_AUTHOR("Vojtech Pavlik");
2125MODULE_AUTHOR("Jiri Kosina");
2126MODULE_LICENSE(DRIVER_LICENSE);
2127
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) 2006-2012 Jiri Kosina
8 */
9
10/*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; either version 2 of the License, or (at your option)
14 * any later version.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/init.h>
22#include <linux/kernel.h>
23#include <linux/list.h>
24#include <linux/mm.h>
25#include <linux/spinlock.h>
26#include <asm/unaligned.h>
27#include <asm/byteorder.h>
28#include <linux/input.h>
29#include <linux/wait.h>
30#include <linux/vmalloc.h>
31#include <linux/sched.h>
32#include <linux/semaphore.h>
33
34#include <linux/hid.h>
35#include <linux/hiddev.h>
36#include <linux/hid-debug.h>
37#include <linux/hidraw.h>
38
39#include "hid-ids.h"
40
41/*
42 * Version Information
43 */
44
45#define DRIVER_DESC "HID core driver"
46
47int hid_debug = 0;
48module_param_named(debug, hid_debug, int, 0600);
49MODULE_PARM_DESC(debug, "toggle HID debugging messages");
50EXPORT_SYMBOL_GPL(hid_debug);
51
52static int hid_ignore_special_drivers = 0;
53module_param_named(ignore_special_drivers, hid_ignore_special_drivers, int, 0600);
54MODULE_PARM_DESC(ignore_special_drivers, "Ignore any special drivers and handle all devices by generic driver");
55
56/*
57 * Register a new report for a device.
58 */
59
60struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
61{
62 struct hid_report_enum *report_enum = device->report_enum + type;
63 struct hid_report *report;
64
65 if (id >= HID_MAX_IDS)
66 return NULL;
67 if (report_enum->report_id_hash[id])
68 return report_enum->report_id_hash[id];
69
70 report = kzalloc(sizeof(struct hid_report), GFP_KERNEL);
71 if (!report)
72 return NULL;
73
74 if (id != 0)
75 report_enum->numbered = 1;
76
77 report->id = id;
78 report->type = type;
79 report->size = 0;
80 report->device = device;
81 report_enum->report_id_hash[id] = report;
82
83 list_add_tail(&report->list, &report_enum->report_list);
84
85 return report;
86}
87EXPORT_SYMBOL_GPL(hid_register_report);
88
89/*
90 * Register a new field for this report.
91 */
92
93static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
94{
95 struct hid_field *field;
96
97 if (report->maxfield == HID_MAX_FIELDS) {
98 hid_err(report->device, "too many fields in report\n");
99 return NULL;
100 }
101
102 field = kzalloc((sizeof(struct hid_field) +
103 usages * sizeof(struct hid_usage) +
104 values * sizeof(unsigned)), GFP_KERNEL);
105 if (!field)
106 return NULL;
107
108 field->index = report->maxfield++;
109 report->field[field->index] = field;
110 field->usage = (struct hid_usage *)(field + 1);
111 field->value = (s32 *)(field->usage + usages);
112 field->report = report;
113
114 return field;
115}
116
117/*
118 * Open a collection. The type/usage is pushed on the stack.
119 */
120
121static int open_collection(struct hid_parser *parser, unsigned type)
122{
123 struct hid_collection *collection;
124 unsigned usage;
125
126 usage = parser->local.usage[0];
127
128 if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
129 hid_err(parser->device, "collection stack overflow\n");
130 return -EINVAL;
131 }
132
133 if (parser->device->maxcollection == parser->device->collection_size) {
134 collection = kmalloc(sizeof(struct hid_collection) *
135 parser->device->collection_size * 2, GFP_KERNEL);
136 if (collection == NULL) {
137 hid_err(parser->device, "failed to reallocate collection array\n");
138 return -ENOMEM;
139 }
140 memcpy(collection, parser->device->collection,
141 sizeof(struct hid_collection) *
142 parser->device->collection_size);
143 memset(collection + parser->device->collection_size, 0,
144 sizeof(struct hid_collection) *
145 parser->device->collection_size);
146 kfree(parser->device->collection);
147 parser->device->collection = collection;
148 parser->device->collection_size *= 2;
149 }
150
151 parser->collection_stack[parser->collection_stack_ptr++] =
152 parser->device->maxcollection;
153
154 collection = parser->device->collection +
155 parser->device->maxcollection++;
156 collection->type = type;
157 collection->usage = usage;
158 collection->level = parser->collection_stack_ptr - 1;
159
160 if (type == HID_COLLECTION_APPLICATION)
161 parser->device->maxapplication++;
162
163 return 0;
164}
165
166/*
167 * Close a collection.
168 */
169
170static int close_collection(struct hid_parser *parser)
171{
172 if (!parser->collection_stack_ptr) {
173 hid_err(parser->device, "collection stack underflow\n");
174 return -EINVAL;
175 }
176 parser->collection_stack_ptr--;
177 return 0;
178}
179
180/*
181 * Climb up the stack, search for the specified collection type
182 * and return the usage.
183 */
184
185static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
186{
187 struct hid_collection *collection = parser->device->collection;
188 int n;
189
190 for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
191 unsigned index = parser->collection_stack[n];
192 if (collection[index].type == type)
193 return collection[index].usage;
194 }
195 return 0; /* we know nothing about this usage type */
196}
197
198/*
199 * Add a usage to the temporary parser table.
200 */
201
202static int hid_add_usage(struct hid_parser *parser, unsigned usage)
203{
204 if (parser->local.usage_index >= HID_MAX_USAGES) {
205 hid_err(parser->device, "usage index exceeded\n");
206 return -1;
207 }
208 parser->local.usage[parser->local.usage_index] = usage;
209 parser->local.collection_index[parser->local.usage_index] =
210 parser->collection_stack_ptr ?
211 parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
212 parser->local.usage_index++;
213 return 0;
214}
215
216/*
217 * Register a new field for this report.
218 */
219
220static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
221{
222 struct hid_report *report;
223 struct hid_field *field;
224 unsigned usages;
225 unsigned offset;
226 unsigned i;
227
228 report = hid_register_report(parser->device, report_type, parser->global.report_id);
229 if (!report) {
230 hid_err(parser->device, "hid_register_report failed\n");
231 return -1;
232 }
233
234 /* Handle both signed and unsigned cases properly */
235 if ((parser->global.logical_minimum < 0 &&
236 parser->global.logical_maximum <
237 parser->global.logical_minimum) ||
238 (parser->global.logical_minimum >= 0 &&
239 (__u32)parser->global.logical_maximum <
240 (__u32)parser->global.logical_minimum)) {
241 dbg_hid("logical range invalid 0x%x 0x%x\n",
242 parser->global.logical_minimum,
243 parser->global.logical_maximum);
244 return -1;
245 }
246
247 offset = report->size;
248 report->size += parser->global.report_size * parser->global.report_count;
249
250 if (!parser->local.usage_index) /* Ignore padding fields */
251 return 0;
252
253 usages = max_t(unsigned, parser->local.usage_index,
254 parser->global.report_count);
255
256 field = hid_register_field(report, usages, parser->global.report_count);
257 if (!field)
258 return 0;
259
260 field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
261 field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
262 field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
263
264 for (i = 0; i < usages; i++) {
265 unsigned j = i;
266 /* Duplicate the last usage we parsed if we have excess values */
267 if (i >= parser->local.usage_index)
268 j = parser->local.usage_index - 1;
269 field->usage[i].hid = parser->local.usage[j];
270 field->usage[i].collection_index =
271 parser->local.collection_index[j];
272 field->usage[i].usage_index = i;
273 }
274
275 field->maxusage = usages;
276 field->flags = flags;
277 field->report_offset = offset;
278 field->report_type = report_type;
279 field->report_size = parser->global.report_size;
280 field->report_count = parser->global.report_count;
281 field->logical_minimum = parser->global.logical_minimum;
282 field->logical_maximum = parser->global.logical_maximum;
283 field->physical_minimum = parser->global.physical_minimum;
284 field->physical_maximum = parser->global.physical_maximum;
285 field->unit_exponent = parser->global.unit_exponent;
286 field->unit = parser->global.unit;
287
288 return 0;
289}
290
291/*
292 * Read data value from item.
293 */
294
295static u32 item_udata(struct hid_item *item)
296{
297 switch (item->size) {
298 case 1: return item->data.u8;
299 case 2: return item->data.u16;
300 case 4: return item->data.u32;
301 }
302 return 0;
303}
304
305static s32 item_sdata(struct hid_item *item)
306{
307 switch (item->size) {
308 case 1: return item->data.s8;
309 case 2: return item->data.s16;
310 case 4: return item->data.s32;
311 }
312 return 0;
313}
314
315/*
316 * Process a global item.
317 */
318
319static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
320{
321 __s32 raw_value;
322 switch (item->tag) {
323 case HID_GLOBAL_ITEM_TAG_PUSH:
324
325 if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
326 hid_err(parser->device, "global environment stack overflow\n");
327 return -1;
328 }
329
330 memcpy(parser->global_stack + parser->global_stack_ptr++,
331 &parser->global, sizeof(struct hid_global));
332 return 0;
333
334 case HID_GLOBAL_ITEM_TAG_POP:
335
336 if (!parser->global_stack_ptr) {
337 hid_err(parser->device, "global environment stack underflow\n");
338 return -1;
339 }
340
341 memcpy(&parser->global, parser->global_stack +
342 --parser->global_stack_ptr, sizeof(struct hid_global));
343 return 0;
344
345 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
346 parser->global.usage_page = item_udata(item);
347 return 0;
348
349 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
350 parser->global.logical_minimum = item_sdata(item);
351 return 0;
352
353 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
354 if (parser->global.logical_minimum < 0)
355 parser->global.logical_maximum = item_sdata(item);
356 else
357 parser->global.logical_maximum = item_udata(item);
358 return 0;
359
360 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
361 parser->global.physical_minimum = item_sdata(item);
362 return 0;
363
364 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
365 if (parser->global.physical_minimum < 0)
366 parser->global.physical_maximum = item_sdata(item);
367 else
368 parser->global.physical_maximum = item_udata(item);
369 return 0;
370
371 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
372 /* Many devices provide unit exponent as a two's complement
373 * nibble due to the common misunderstanding of HID
374 * specification 1.11, 6.2.2.7 Global Items. Attempt to handle
375 * both this and the standard encoding. */
376 raw_value = item_sdata(item);
377 if (!(raw_value & 0xfffffff0))
378 parser->global.unit_exponent = hid_snto32(raw_value, 4);
379 else
380 parser->global.unit_exponent = raw_value;
381 return 0;
382
383 case HID_GLOBAL_ITEM_TAG_UNIT:
384 parser->global.unit = item_udata(item);
385 return 0;
386
387 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
388 parser->global.report_size = item_udata(item);
389 if (parser->global.report_size > 128) {
390 hid_err(parser->device, "invalid report_size %d\n",
391 parser->global.report_size);
392 return -1;
393 }
394 return 0;
395
396 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
397 parser->global.report_count = item_udata(item);
398 if (parser->global.report_count > HID_MAX_USAGES) {
399 hid_err(parser->device, "invalid report_count %d\n",
400 parser->global.report_count);
401 return -1;
402 }
403 return 0;
404
405 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
406 parser->global.report_id = item_udata(item);
407 if (parser->global.report_id == 0 ||
408 parser->global.report_id >= HID_MAX_IDS) {
409 hid_err(parser->device, "report_id %u is invalid\n",
410 parser->global.report_id);
411 return -1;
412 }
413 return 0;
414
415 default:
416 hid_err(parser->device, "unknown global tag 0x%x\n", item->tag);
417 return -1;
418 }
419}
420
421/*
422 * Process a local item.
423 */
424
425static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
426{
427 __u32 data;
428 unsigned n;
429 __u32 count;
430
431 data = item_udata(item);
432
433 switch (item->tag) {
434 case HID_LOCAL_ITEM_TAG_DELIMITER:
435
436 if (data) {
437 /*
438 * We treat items before the first delimiter
439 * as global to all usage sets (branch 0).
440 * In the moment we process only these global
441 * items and the first delimiter set.
442 */
443 if (parser->local.delimiter_depth != 0) {
444 hid_err(parser->device, "nested delimiters\n");
445 return -1;
446 }
447 parser->local.delimiter_depth++;
448 parser->local.delimiter_branch++;
449 } else {
450 if (parser->local.delimiter_depth < 1) {
451 hid_err(parser->device, "bogus close delimiter\n");
452 return -1;
453 }
454 parser->local.delimiter_depth--;
455 }
456 return 0;
457
458 case HID_LOCAL_ITEM_TAG_USAGE:
459
460 if (parser->local.delimiter_branch > 1) {
461 dbg_hid("alternative usage ignored\n");
462 return 0;
463 }
464
465 if (item->size <= 2)
466 data = (parser->global.usage_page << 16) + data;
467
468 return hid_add_usage(parser, data);
469
470 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
471
472 if (parser->local.delimiter_branch > 1) {
473 dbg_hid("alternative usage ignored\n");
474 return 0;
475 }
476
477 if (item->size <= 2)
478 data = (parser->global.usage_page << 16) + data;
479
480 parser->local.usage_minimum = data;
481 return 0;
482
483 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
484
485 if (parser->local.delimiter_branch > 1) {
486 dbg_hid("alternative usage ignored\n");
487 return 0;
488 }
489
490 if (item->size <= 2)
491 data = (parser->global.usage_page << 16) + data;
492
493 count = data - parser->local.usage_minimum;
494 if (count + parser->local.usage_index >= HID_MAX_USAGES) {
495 /*
496 * We do not warn if the name is not set, we are
497 * actually pre-scanning the device.
498 */
499 if (dev_name(&parser->device->dev))
500 hid_warn(parser->device,
501 "ignoring exceeding usage max\n");
502 data = HID_MAX_USAGES - parser->local.usage_index +
503 parser->local.usage_minimum - 1;
504 if (data <= 0) {
505 hid_err(parser->device,
506 "no more usage index available\n");
507 return -1;
508 }
509 }
510
511 for (n = parser->local.usage_minimum; n <= data; n++)
512 if (hid_add_usage(parser, n)) {
513 dbg_hid("hid_add_usage failed\n");
514 return -1;
515 }
516 return 0;
517
518 default:
519
520 dbg_hid("unknown local item tag 0x%x\n", item->tag);
521 return 0;
522 }
523 return 0;
524}
525
526/*
527 * Process a main item.
528 */
529
530static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
531{
532 __u32 data;
533 int ret;
534
535 data = item_udata(item);
536
537 switch (item->tag) {
538 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
539 ret = open_collection(parser, data & 0xff);
540 break;
541 case HID_MAIN_ITEM_TAG_END_COLLECTION:
542 ret = close_collection(parser);
543 break;
544 case HID_MAIN_ITEM_TAG_INPUT:
545 ret = hid_add_field(parser, HID_INPUT_REPORT, data);
546 break;
547 case HID_MAIN_ITEM_TAG_OUTPUT:
548 ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
549 break;
550 case HID_MAIN_ITEM_TAG_FEATURE:
551 ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
552 break;
553 default:
554 hid_warn(parser->device, "unknown main item tag 0x%x\n", item->tag);
555 ret = 0;
556 }
557
558 memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */
559
560 return ret;
561}
562
563/*
564 * Process a reserved item.
565 */
566
567static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
568{
569 dbg_hid("reserved item type, tag 0x%x\n", item->tag);
570 return 0;
571}
572
573/*
574 * Free a report and all registered fields. The field->usage and
575 * field->value table's are allocated behind the field, so we need
576 * only to free(field) itself.
577 */
578
579static void hid_free_report(struct hid_report *report)
580{
581 unsigned n;
582
583 for (n = 0; n < report->maxfield; n++)
584 kfree(report->field[n]);
585 kfree(report);
586}
587
588/*
589 * Close report. This function returns the device
590 * state to the point prior to hid_open_report().
591 */
592static void hid_close_report(struct hid_device *device)
593{
594 unsigned i, j;
595
596 for (i = 0; i < HID_REPORT_TYPES; i++) {
597 struct hid_report_enum *report_enum = device->report_enum + i;
598
599 for (j = 0; j < HID_MAX_IDS; j++) {
600 struct hid_report *report = report_enum->report_id_hash[j];
601 if (report)
602 hid_free_report(report);
603 }
604 memset(report_enum, 0, sizeof(*report_enum));
605 INIT_LIST_HEAD(&report_enum->report_list);
606 }
607
608 kfree(device->rdesc);
609 device->rdesc = NULL;
610 device->rsize = 0;
611
612 kfree(device->collection);
613 device->collection = NULL;
614 device->collection_size = 0;
615 device->maxcollection = 0;
616 device->maxapplication = 0;
617
618 device->status &= ~HID_STAT_PARSED;
619}
620
621/*
622 * Free a device structure, all reports, and all fields.
623 */
624
625static void hid_device_release(struct device *dev)
626{
627 struct hid_device *hid = to_hid_device(dev);
628
629 hid_close_report(hid);
630 kfree(hid->dev_rdesc);
631 kfree(hid);
632}
633
634/*
635 * Fetch a report description item from the data stream. We support long
636 * items, though they are not used yet.
637 */
638
639static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
640{
641 u8 b;
642
643 if ((end - start) <= 0)
644 return NULL;
645
646 b = *start++;
647
648 item->type = (b >> 2) & 3;
649 item->tag = (b >> 4) & 15;
650
651 if (item->tag == HID_ITEM_TAG_LONG) {
652
653 item->format = HID_ITEM_FORMAT_LONG;
654
655 if ((end - start) < 2)
656 return NULL;
657
658 item->size = *start++;
659 item->tag = *start++;
660
661 if ((end - start) < item->size)
662 return NULL;
663
664 item->data.longdata = start;
665 start += item->size;
666 return start;
667 }
668
669 item->format = HID_ITEM_FORMAT_SHORT;
670 item->size = b & 3;
671
672 switch (item->size) {
673 case 0:
674 return start;
675
676 case 1:
677 if ((end - start) < 1)
678 return NULL;
679 item->data.u8 = *start++;
680 return start;
681
682 case 2:
683 if ((end - start) < 2)
684 return NULL;
685 item->data.u16 = get_unaligned_le16(start);
686 start = (__u8 *)((__le16 *)start + 1);
687 return start;
688
689 case 3:
690 item->size++;
691 if ((end - start) < 4)
692 return NULL;
693 item->data.u32 = get_unaligned_le32(start);
694 start = (__u8 *)((__le32 *)start + 1);
695 return start;
696 }
697
698 return NULL;
699}
700
701static void hid_scan_input_usage(struct hid_parser *parser, u32 usage)
702{
703 struct hid_device *hid = parser->device;
704
705 if (usage == HID_DG_CONTACTID)
706 hid->group = HID_GROUP_MULTITOUCH;
707}
708
709static void hid_scan_feature_usage(struct hid_parser *parser, u32 usage)
710{
711 if (usage == 0xff0000c5 && parser->global.report_count == 256 &&
712 parser->global.report_size == 8)
713 parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8;
714}
715
716static void hid_scan_collection(struct hid_parser *parser, unsigned type)
717{
718 struct hid_device *hid = parser->device;
719 int i;
720
721 if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&
722 type == HID_COLLECTION_PHYSICAL)
723 hid->group = HID_GROUP_SENSOR_HUB;
724
725 if (hid->vendor == USB_VENDOR_ID_MICROSOFT &&
726 hid->product == USB_DEVICE_ID_MS_POWER_COVER &&
727 hid->group == HID_GROUP_MULTITOUCH)
728 hid->group = HID_GROUP_GENERIC;
729
730 if ((parser->global.usage_page << 16) == HID_UP_GENDESK)
731 for (i = 0; i < parser->local.usage_index; i++)
732 if (parser->local.usage[i] == HID_GD_POINTER)
733 parser->scan_flags |= HID_SCAN_FLAG_GD_POINTER;
734
735 if ((parser->global.usage_page << 16) >= HID_UP_MSVENDOR)
736 parser->scan_flags |= HID_SCAN_FLAG_VENDOR_SPECIFIC;
737}
738
739static int hid_scan_main(struct hid_parser *parser, struct hid_item *item)
740{
741 __u32 data;
742 int i;
743
744 data = item_udata(item);
745
746 switch (item->tag) {
747 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
748 hid_scan_collection(parser, data & 0xff);
749 break;
750 case HID_MAIN_ITEM_TAG_END_COLLECTION:
751 break;
752 case HID_MAIN_ITEM_TAG_INPUT:
753 /* ignore constant inputs, they will be ignored by hid-input */
754 if (data & HID_MAIN_ITEM_CONSTANT)
755 break;
756 for (i = 0; i < parser->local.usage_index; i++)
757 hid_scan_input_usage(parser, parser->local.usage[i]);
758 break;
759 case HID_MAIN_ITEM_TAG_OUTPUT:
760 break;
761 case HID_MAIN_ITEM_TAG_FEATURE:
762 for (i = 0; i < parser->local.usage_index; i++)
763 hid_scan_feature_usage(parser, parser->local.usage[i]);
764 break;
765 }
766
767 /* Reset the local parser environment */
768 memset(&parser->local, 0, sizeof(parser->local));
769
770 return 0;
771}
772
773/*
774 * Scan a report descriptor before the device is added to the bus.
775 * Sets device groups and other properties that determine what driver
776 * to load.
777 */
778static int hid_scan_report(struct hid_device *hid)
779{
780 struct hid_parser *parser;
781 struct hid_item item;
782 __u8 *start = hid->dev_rdesc;
783 __u8 *end = start + hid->dev_rsize;
784 static int (*dispatch_type[])(struct hid_parser *parser,
785 struct hid_item *item) = {
786 hid_scan_main,
787 hid_parser_global,
788 hid_parser_local,
789 hid_parser_reserved
790 };
791
792 parser = vzalloc(sizeof(struct hid_parser));
793 if (!parser)
794 return -ENOMEM;
795
796 parser->device = hid;
797 hid->group = HID_GROUP_GENERIC;
798
799 /*
800 * The parsing is simpler than the one in hid_open_report() as we should
801 * be robust against hid errors. Those errors will be raised by
802 * hid_open_report() anyway.
803 */
804 while ((start = fetch_item(start, end, &item)) != NULL)
805 dispatch_type[item.type](parser, &item);
806
807 /*
808 * Handle special flags set during scanning.
809 */
810 if ((parser->scan_flags & HID_SCAN_FLAG_MT_WIN_8) &&
811 (hid->group == HID_GROUP_MULTITOUCH))
812 hid->group = HID_GROUP_MULTITOUCH_WIN_8;
813
814 /*
815 * Vendor specific handlings
816 */
817 switch (hid->vendor) {
818 case USB_VENDOR_ID_WACOM:
819 hid->group = HID_GROUP_WACOM;
820 break;
821 case USB_VENDOR_ID_SYNAPTICS:
822 if (hid->group == HID_GROUP_GENERIC)
823 if ((parser->scan_flags & HID_SCAN_FLAG_VENDOR_SPECIFIC)
824 && (parser->scan_flags & HID_SCAN_FLAG_GD_POINTER))
825 /*
826 * hid-rmi should take care of them,
827 * not hid-generic
828 */
829 hid->group = HID_GROUP_RMI;
830 break;
831 }
832
833 vfree(parser);
834 return 0;
835}
836
837/**
838 * hid_parse_report - parse device report
839 *
840 * @device: hid device
841 * @start: report start
842 * @size: report size
843 *
844 * Allocate the device report as read by the bus driver. This function should
845 * only be called from parse() in ll drivers.
846 */
847int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size)
848{
849 hid->dev_rdesc = kmemdup(start, size, GFP_KERNEL);
850 if (!hid->dev_rdesc)
851 return -ENOMEM;
852 hid->dev_rsize = size;
853 return 0;
854}
855EXPORT_SYMBOL_GPL(hid_parse_report);
856
857static const char * const hid_report_names[] = {
858 "HID_INPUT_REPORT",
859 "HID_OUTPUT_REPORT",
860 "HID_FEATURE_REPORT",
861};
862/**
863 * hid_validate_values - validate existing device report's value indexes
864 *
865 * @device: hid device
866 * @type: which report type to examine
867 * @id: which report ID to examine (0 for first)
868 * @field_index: which report field to examine
869 * @report_counts: expected number of values
870 *
871 * Validate the number of values in a given field of a given report, after
872 * parsing.
873 */
874struct hid_report *hid_validate_values(struct hid_device *hid,
875 unsigned int type, unsigned int id,
876 unsigned int field_index,
877 unsigned int report_counts)
878{
879 struct hid_report *report;
880
881 if (type > HID_FEATURE_REPORT) {
882 hid_err(hid, "invalid HID report type %u\n", type);
883 return NULL;
884 }
885
886 if (id >= HID_MAX_IDS) {
887 hid_err(hid, "invalid HID report id %u\n", id);
888 return NULL;
889 }
890
891 /*
892 * Explicitly not using hid_get_report() here since it depends on
893 * ->numbered being checked, which may not always be the case when
894 * drivers go to access report values.
895 */
896 if (id == 0) {
897 /*
898 * Validating on id 0 means we should examine the first
899 * report in the list.
900 */
901 report = list_entry(
902 hid->report_enum[type].report_list.next,
903 struct hid_report, list);
904 } else {
905 report = hid->report_enum[type].report_id_hash[id];
906 }
907 if (!report) {
908 hid_err(hid, "missing %s %u\n", hid_report_names[type], id);
909 return NULL;
910 }
911 if (report->maxfield <= field_index) {
912 hid_err(hid, "not enough fields in %s %u\n",
913 hid_report_names[type], id);
914 return NULL;
915 }
916 if (report->field[field_index]->report_count < report_counts) {
917 hid_err(hid, "not enough values in %s %u field %u\n",
918 hid_report_names[type], id, field_index);
919 return NULL;
920 }
921 return report;
922}
923EXPORT_SYMBOL_GPL(hid_validate_values);
924
925/**
926 * hid_open_report - open a driver-specific device report
927 *
928 * @device: hid device
929 *
930 * Parse a report description into a hid_device structure. Reports are
931 * enumerated, fields are attached to these reports.
932 * 0 returned on success, otherwise nonzero error value.
933 *
934 * This function (or the equivalent hid_parse() macro) should only be
935 * called from probe() in drivers, before starting the device.
936 */
937int hid_open_report(struct hid_device *device)
938{
939 struct hid_parser *parser;
940 struct hid_item item;
941 unsigned int size;
942 __u8 *start;
943 __u8 *buf;
944 __u8 *end;
945 int ret;
946 static int (*dispatch_type[])(struct hid_parser *parser,
947 struct hid_item *item) = {
948 hid_parser_main,
949 hid_parser_global,
950 hid_parser_local,
951 hid_parser_reserved
952 };
953
954 if (WARN_ON(device->status & HID_STAT_PARSED))
955 return -EBUSY;
956
957 start = device->dev_rdesc;
958 if (WARN_ON(!start))
959 return -ENODEV;
960 size = device->dev_rsize;
961
962 buf = kmemdup(start, size, GFP_KERNEL);
963 if (buf == NULL)
964 return -ENOMEM;
965
966 if (device->driver->report_fixup)
967 start = device->driver->report_fixup(device, buf, &size);
968 else
969 start = buf;
970
971 start = kmemdup(start, size, GFP_KERNEL);
972 kfree(buf);
973 if (start == NULL)
974 return -ENOMEM;
975
976 device->rdesc = start;
977 device->rsize = size;
978
979 parser = vzalloc(sizeof(struct hid_parser));
980 if (!parser) {
981 ret = -ENOMEM;
982 goto err;
983 }
984
985 parser->device = device;
986
987 end = start + size;
988
989 device->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
990 sizeof(struct hid_collection), GFP_KERNEL);
991 if (!device->collection) {
992 ret = -ENOMEM;
993 goto err;
994 }
995 device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
996
997 ret = -EINVAL;
998 while ((start = fetch_item(start, end, &item)) != NULL) {
999
1000 if (item.format != HID_ITEM_FORMAT_SHORT) {
1001 hid_err(device, "unexpected long global item\n");
1002 goto err;
1003 }
1004
1005 if (dispatch_type[item.type](parser, &item)) {
1006 hid_err(device, "item %u %u %u %u parsing failed\n",
1007 item.format, (unsigned)item.size,
1008 (unsigned)item.type, (unsigned)item.tag);
1009 goto err;
1010 }
1011
1012 if (start == end) {
1013 if (parser->collection_stack_ptr) {
1014 hid_err(device, "unbalanced collection at end of report description\n");
1015 goto err;
1016 }
1017 if (parser->local.delimiter_depth) {
1018 hid_err(device, "unbalanced delimiter at end of report description\n");
1019 goto err;
1020 }
1021 vfree(parser);
1022 device->status |= HID_STAT_PARSED;
1023 return 0;
1024 }
1025 }
1026
1027 hid_err(device, "item fetching failed at offset %d\n", (int)(end - start));
1028err:
1029 vfree(parser);
1030 hid_close_report(device);
1031 return ret;
1032}
1033EXPORT_SYMBOL_GPL(hid_open_report);
1034
1035/*
1036 * Convert a signed n-bit integer to signed 32-bit integer. Common
1037 * cases are done through the compiler, the screwed things has to be
1038 * done by hand.
1039 */
1040
1041static s32 snto32(__u32 value, unsigned n)
1042{
1043 switch (n) {
1044 case 8: return ((__s8)value);
1045 case 16: return ((__s16)value);
1046 case 32: return ((__s32)value);
1047 }
1048 return value & (1 << (n - 1)) ? value | (~0U << n) : value;
1049}
1050
1051s32 hid_snto32(__u32 value, unsigned n)
1052{
1053 return snto32(value, n);
1054}
1055EXPORT_SYMBOL_GPL(hid_snto32);
1056
1057/*
1058 * Convert a signed 32-bit integer to a signed n-bit integer.
1059 */
1060
1061static u32 s32ton(__s32 value, unsigned n)
1062{
1063 s32 a = value >> (n - 1);
1064 if (a && a != -1)
1065 return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
1066 return value & ((1 << n) - 1);
1067}
1068
1069/*
1070 * Extract/implement a data field from/to a little endian report (bit array).
1071 *
1072 * Code sort-of follows HID spec:
1073 * http://www.usb.org/developers/hidpage/HID1_11.pdf
1074 *
1075 * While the USB HID spec allows unlimited length bit fields in "report
1076 * descriptors", most devices never use more than 16 bits.
1077 * One model of UPS is claimed to report "LINEV" as a 32-bit field.
1078 * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
1079 */
1080
1081static u32 __extract(u8 *report, unsigned offset, int n)
1082{
1083 unsigned int idx = offset / 8;
1084 unsigned int bit_nr = 0;
1085 unsigned int bit_shift = offset % 8;
1086 int bits_to_copy = 8 - bit_shift;
1087 u32 value = 0;
1088 u32 mask = n < 32 ? (1U << n) - 1 : ~0U;
1089
1090 while (n > 0) {
1091 value |= ((u32)report[idx] >> bit_shift) << bit_nr;
1092 n -= bits_to_copy;
1093 bit_nr += bits_to_copy;
1094 bits_to_copy = 8;
1095 bit_shift = 0;
1096 idx++;
1097 }
1098
1099 return value & mask;
1100}
1101
1102u32 hid_field_extract(const struct hid_device *hid, u8 *report,
1103 unsigned offset, unsigned n)
1104{
1105 if (n > 32) {
1106 hid_warn(hid, "hid_field_extract() called with n (%d) > 32! (%s)\n",
1107 n, current->comm);
1108 n = 32;
1109 }
1110
1111 return __extract(report, offset, n);
1112}
1113EXPORT_SYMBOL_GPL(hid_field_extract);
1114
1115/*
1116 * "implement" : set bits in a little endian bit stream.
1117 * Same concepts as "extract" (see comments above).
1118 * The data mangled in the bit stream remains in little endian
1119 * order the whole time. It make more sense to talk about
1120 * endianness of register values by considering a register
1121 * a "cached" copy of the little endian bit stream.
1122 */
1123
1124static void __implement(u8 *report, unsigned offset, int n, u32 value)
1125{
1126 unsigned int idx = offset / 8;
1127 unsigned int bit_shift = offset % 8;
1128 int bits_to_set = 8 - bit_shift;
1129
1130 while (n - bits_to_set >= 0) {
1131 report[idx] &= ~(0xff << bit_shift);
1132 report[idx] |= value << bit_shift;
1133 value >>= bits_to_set;
1134 n -= bits_to_set;
1135 bits_to_set = 8;
1136 bit_shift = 0;
1137 idx++;
1138 }
1139
1140 /* last nibble */
1141 if (n) {
1142 u8 bit_mask = ((1U << n) - 1);
1143 report[idx] &= ~(bit_mask << bit_shift);
1144 report[idx] |= value << bit_shift;
1145 }
1146}
1147
1148static void implement(const struct hid_device *hid, u8 *report,
1149 unsigned offset, unsigned n, u32 value)
1150{
1151 if (unlikely(n > 32)) {
1152 hid_warn(hid, "%s() called with n (%d) > 32! (%s)\n",
1153 __func__, n, current->comm);
1154 n = 32;
1155 } else if (n < 32) {
1156 u32 m = (1U << n) - 1;
1157
1158 if (unlikely(value > m)) {
1159 hid_warn(hid,
1160 "%s() called with too large value %d (n: %d)! (%s)\n",
1161 __func__, value, n, current->comm);
1162 WARN_ON(1);
1163 value &= m;
1164 }
1165 }
1166
1167 __implement(report, offset, n, value);
1168}
1169
1170/*
1171 * Search an array for a value.
1172 */
1173
1174static int search(__s32 *array, __s32 value, unsigned n)
1175{
1176 while (n--) {
1177 if (*array++ == value)
1178 return 0;
1179 }
1180 return -1;
1181}
1182
1183/**
1184 * hid_match_report - check if driver's raw_event should be called
1185 *
1186 * @hid: hid device
1187 * @report_type: type to match against
1188 *
1189 * compare hid->driver->report_table->report_type to report->type
1190 */
1191static int hid_match_report(struct hid_device *hid, struct hid_report *report)
1192{
1193 const struct hid_report_id *id = hid->driver->report_table;
1194
1195 if (!id) /* NULL means all */
1196 return 1;
1197
1198 for (; id->report_type != HID_TERMINATOR; id++)
1199 if (id->report_type == HID_ANY_ID ||
1200 id->report_type == report->type)
1201 return 1;
1202 return 0;
1203}
1204
1205/**
1206 * hid_match_usage - check if driver's event should be called
1207 *
1208 * @hid: hid device
1209 * @usage: usage to match against
1210 *
1211 * compare hid->driver->usage_table->usage_{type,code} to
1212 * usage->usage_{type,code}
1213 */
1214static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
1215{
1216 const struct hid_usage_id *id = hid->driver->usage_table;
1217
1218 if (!id) /* NULL means all */
1219 return 1;
1220
1221 for (; id->usage_type != HID_ANY_ID - 1; id++)
1222 if ((id->usage_hid == HID_ANY_ID ||
1223 id->usage_hid == usage->hid) &&
1224 (id->usage_type == HID_ANY_ID ||
1225 id->usage_type == usage->type) &&
1226 (id->usage_code == HID_ANY_ID ||
1227 id->usage_code == usage->code))
1228 return 1;
1229 return 0;
1230}
1231
1232static void hid_process_event(struct hid_device *hid, struct hid_field *field,
1233 struct hid_usage *usage, __s32 value, int interrupt)
1234{
1235 struct hid_driver *hdrv = hid->driver;
1236 int ret;
1237
1238 if (!list_empty(&hid->debug_list))
1239 hid_dump_input(hid, usage, value);
1240
1241 if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
1242 ret = hdrv->event(hid, field, usage, value);
1243 if (ret != 0) {
1244 if (ret < 0)
1245 hid_err(hid, "%s's event failed with %d\n",
1246 hdrv->name, ret);
1247 return;
1248 }
1249 }
1250
1251 if (hid->claimed & HID_CLAIMED_INPUT)
1252 hidinput_hid_event(hid, field, usage, value);
1253 if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
1254 hid->hiddev_hid_event(hid, field, usage, value);
1255}
1256
1257/*
1258 * Analyse a received field, and fetch the data from it. The field
1259 * content is stored for next report processing (we do differential
1260 * reporting to the layer).
1261 */
1262
1263static void hid_input_field(struct hid_device *hid, struct hid_field *field,
1264 __u8 *data, int interrupt)
1265{
1266 unsigned n;
1267 unsigned count = field->report_count;
1268 unsigned offset = field->report_offset;
1269 unsigned size = field->report_size;
1270 __s32 min = field->logical_minimum;
1271 __s32 max = field->logical_maximum;
1272 __s32 *value;
1273
1274 value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC);
1275 if (!value)
1276 return;
1277
1278 for (n = 0; n < count; n++) {
1279
1280 value[n] = min < 0 ?
1281 snto32(hid_field_extract(hid, data, offset + n * size,
1282 size), size) :
1283 hid_field_extract(hid, data, offset + n * size, size);
1284
1285 /* Ignore report if ErrorRollOver */
1286 if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
1287 value[n] >= min && value[n] <= max &&
1288 value[n] - min < field->maxusage &&
1289 field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
1290 goto exit;
1291 }
1292
1293 for (n = 0; n < count; n++) {
1294
1295 if (HID_MAIN_ITEM_VARIABLE & field->flags) {
1296 hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
1297 continue;
1298 }
1299
1300 if (field->value[n] >= min && field->value[n] <= max
1301 && field->value[n] - min < field->maxusage
1302 && field->usage[field->value[n] - min].hid
1303 && search(value, field->value[n], count))
1304 hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
1305
1306 if (value[n] >= min && value[n] <= max
1307 && value[n] - min < field->maxusage
1308 && field->usage[value[n] - min].hid
1309 && search(field->value, value[n], count))
1310 hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
1311 }
1312
1313 memcpy(field->value, value, count * sizeof(__s32));
1314exit:
1315 kfree(value);
1316}
1317
1318/*
1319 * Output the field into the report.
1320 */
1321
1322static void hid_output_field(const struct hid_device *hid,
1323 struct hid_field *field, __u8 *data)
1324{
1325 unsigned count = field->report_count;
1326 unsigned offset = field->report_offset;
1327 unsigned size = field->report_size;
1328 unsigned n;
1329
1330 for (n = 0; n < count; n++) {
1331 if (field->logical_minimum < 0) /* signed values */
1332 implement(hid, data, offset + n * size, size,
1333 s32ton(field->value[n], size));
1334 else /* unsigned values */
1335 implement(hid, data, offset + n * size, size,
1336 field->value[n]);
1337 }
1338}
1339
1340/*
1341 * Create a report. 'data' has to be allocated using
1342 * hid_alloc_report_buf() so that it has proper size.
1343 */
1344
1345void hid_output_report(struct hid_report *report, __u8 *data)
1346{
1347 unsigned n;
1348
1349 if (report->id > 0)
1350 *data++ = report->id;
1351
1352 memset(data, 0, ((report->size - 1) >> 3) + 1);
1353 for (n = 0; n < report->maxfield; n++)
1354 hid_output_field(report->device, report->field[n], data);
1355}
1356EXPORT_SYMBOL_GPL(hid_output_report);
1357
1358/*
1359 * Allocator for buffer that is going to be passed to hid_output_report()
1360 */
1361u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags)
1362{
1363 /*
1364 * 7 extra bytes are necessary to achieve proper functionality
1365 * of implement() working on 8 byte chunks
1366 */
1367
1368 u32 len = hid_report_len(report) + 7;
1369
1370 return kmalloc(len, flags);
1371}
1372EXPORT_SYMBOL_GPL(hid_alloc_report_buf);
1373
1374/*
1375 * Set a field value. The report this field belongs to has to be
1376 * created and transferred to the device, to set this value in the
1377 * device.
1378 */
1379
1380int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
1381{
1382 unsigned size;
1383
1384 if (!field)
1385 return -1;
1386
1387 size = field->report_size;
1388
1389 hid_dump_input(field->report->device, field->usage + offset, value);
1390
1391 if (offset >= field->report_count) {
1392 hid_err(field->report->device, "offset (%d) exceeds report_count (%d)\n",
1393 offset, field->report_count);
1394 return -1;
1395 }
1396 if (field->logical_minimum < 0) {
1397 if (value != snto32(s32ton(value, size), size)) {
1398 hid_err(field->report->device, "value %d is out of range\n", value);
1399 return -1;
1400 }
1401 }
1402 field->value[offset] = value;
1403 return 0;
1404}
1405EXPORT_SYMBOL_GPL(hid_set_field);
1406
1407static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1408 const u8 *data)
1409{
1410 struct hid_report *report;
1411 unsigned int n = 0; /* Normally report number is 0 */
1412
1413 /* Device uses numbered reports, data[0] is report number */
1414 if (report_enum->numbered)
1415 n = *data;
1416
1417 report = report_enum->report_id_hash[n];
1418 if (report == NULL)
1419 dbg_hid("undefined report_id %u received\n", n);
1420
1421 return report;
1422}
1423
1424/*
1425 * Implement a generic .request() callback, using .raw_request()
1426 * DO NOT USE in hid drivers directly, but through hid_hw_request instead.
1427 */
1428void __hid_request(struct hid_device *hid, struct hid_report *report,
1429 int reqtype)
1430{
1431 char *buf;
1432 int ret;
1433 u32 len;
1434
1435 buf = hid_alloc_report_buf(report, GFP_KERNEL);
1436 if (!buf)
1437 return;
1438
1439 len = hid_report_len(report);
1440
1441 if (reqtype == HID_REQ_SET_REPORT)
1442 hid_output_report(report, buf);
1443
1444 ret = hid->ll_driver->raw_request(hid, report->id, buf, len,
1445 report->type, reqtype);
1446 if (ret < 0) {
1447 dbg_hid("unable to complete request: %d\n", ret);
1448 goto out;
1449 }
1450
1451 if (reqtype == HID_REQ_GET_REPORT)
1452 hid_input_report(hid, report->type, buf, ret, 0);
1453
1454out:
1455 kfree(buf);
1456}
1457EXPORT_SYMBOL_GPL(__hid_request);
1458
1459int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
1460 int interrupt)
1461{
1462 struct hid_report_enum *report_enum = hid->report_enum + type;
1463 struct hid_report *report;
1464 struct hid_driver *hdrv;
1465 unsigned int a;
1466 u32 rsize, csize = size;
1467 u8 *cdata = data;
1468 int ret = 0;
1469
1470 report = hid_get_report(report_enum, data);
1471 if (!report)
1472 goto out;
1473
1474 if (report_enum->numbered) {
1475 cdata++;
1476 csize--;
1477 }
1478
1479 rsize = ((report->size - 1) >> 3) + 1;
1480
1481 if (rsize > HID_MAX_BUFFER_SIZE)
1482 rsize = HID_MAX_BUFFER_SIZE;
1483
1484 if (csize < rsize) {
1485 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1486 csize, rsize);
1487 memset(cdata + csize, 0, rsize - csize);
1488 }
1489
1490 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1491 hid->hiddev_report_event(hid, report);
1492 if (hid->claimed & HID_CLAIMED_HIDRAW) {
1493 ret = hidraw_report_event(hid, data, size);
1494 if (ret)
1495 goto out;
1496 }
1497
1498 if (hid->claimed != HID_CLAIMED_HIDRAW && report->maxfield) {
1499 for (a = 0; a < report->maxfield; a++)
1500 hid_input_field(hid, report->field[a], cdata, interrupt);
1501 hdrv = hid->driver;
1502 if (hdrv && hdrv->report)
1503 hdrv->report(hid, report);
1504 }
1505
1506 if (hid->claimed & HID_CLAIMED_INPUT)
1507 hidinput_report_event(hid, report);
1508out:
1509 return ret;
1510}
1511EXPORT_SYMBOL_GPL(hid_report_raw_event);
1512
1513/**
1514 * hid_input_report - report data from lower layer (usb, bt...)
1515 *
1516 * @hid: hid device
1517 * @type: HID report type (HID_*_REPORT)
1518 * @data: report contents
1519 * @size: size of data parameter
1520 * @interrupt: distinguish between interrupt and control transfers
1521 *
1522 * This is data entry for lower layers.
1523 */
1524int hid_input_report(struct hid_device *hid, int type, u8 *data, u32 size, int interrupt)
1525{
1526 struct hid_report_enum *report_enum;
1527 struct hid_driver *hdrv;
1528 struct hid_report *report;
1529 int ret = 0;
1530
1531 if (!hid)
1532 return -ENODEV;
1533
1534 if (down_trylock(&hid->driver_input_lock))
1535 return -EBUSY;
1536
1537 if (!hid->driver) {
1538 ret = -ENODEV;
1539 goto unlock;
1540 }
1541 report_enum = hid->report_enum + type;
1542 hdrv = hid->driver;
1543
1544 if (!size) {
1545 dbg_hid("empty report\n");
1546 ret = -1;
1547 goto unlock;
1548 }
1549
1550 /* Avoid unnecessary overhead if debugfs is disabled */
1551 if (!list_empty(&hid->debug_list))
1552 hid_dump_report(hid, type, data, size);
1553
1554 report = hid_get_report(report_enum, data);
1555
1556 if (!report) {
1557 ret = -1;
1558 goto unlock;
1559 }
1560
1561 if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1562 ret = hdrv->raw_event(hid, report, data, size);
1563 if (ret < 0)
1564 goto unlock;
1565 }
1566
1567 ret = hid_report_raw_event(hid, type, data, size, interrupt);
1568
1569unlock:
1570 up(&hid->driver_input_lock);
1571 return ret;
1572}
1573EXPORT_SYMBOL_GPL(hid_input_report);
1574
1575bool hid_match_one_id(const struct hid_device *hdev,
1576 const struct hid_device_id *id)
1577{
1578 return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
1579 (id->group == HID_GROUP_ANY || id->group == hdev->group) &&
1580 (id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1581 (id->product == HID_ANY_ID || id->product == hdev->product);
1582}
1583
1584const struct hid_device_id *hid_match_id(const struct hid_device *hdev,
1585 const struct hid_device_id *id)
1586{
1587 for (; id->bus; id++)
1588 if (hid_match_one_id(hdev, id))
1589 return id;
1590
1591 return NULL;
1592}
1593
1594static const struct hid_device_id hid_hiddev_list[] = {
1595 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1596 { HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1597 { }
1598};
1599
1600static bool hid_hiddev(struct hid_device *hdev)
1601{
1602 return !!hid_match_id(hdev, hid_hiddev_list);
1603}
1604
1605
1606static ssize_t
1607read_report_descriptor(struct file *filp, struct kobject *kobj,
1608 struct bin_attribute *attr,
1609 char *buf, loff_t off, size_t count)
1610{
1611 struct device *dev = kobj_to_dev(kobj);
1612 struct hid_device *hdev = to_hid_device(dev);
1613
1614 if (off >= hdev->rsize)
1615 return 0;
1616
1617 if (off + count > hdev->rsize)
1618 count = hdev->rsize - off;
1619
1620 memcpy(buf, hdev->rdesc + off, count);
1621
1622 return count;
1623}
1624
1625static ssize_t
1626show_country(struct device *dev, struct device_attribute *attr,
1627 char *buf)
1628{
1629 struct hid_device *hdev = to_hid_device(dev);
1630
1631 return sprintf(buf, "%02x\n", hdev->country & 0xff);
1632}
1633
1634static struct bin_attribute dev_bin_attr_report_desc = {
1635 .attr = { .name = "report_descriptor", .mode = 0444 },
1636 .read = read_report_descriptor,
1637 .size = HID_MAX_DESCRIPTOR_SIZE,
1638};
1639
1640static const struct device_attribute dev_attr_country = {
1641 .attr = { .name = "country", .mode = 0444 },
1642 .show = show_country,
1643};
1644
1645int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1646{
1647 static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1648 "Joystick", "Gamepad", "Keyboard", "Keypad",
1649 "Multi-Axis Controller"
1650 };
1651 const char *type, *bus;
1652 char buf[64] = "";
1653 unsigned int i;
1654 int len;
1655 int ret;
1656
1657 if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
1658 connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
1659 if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
1660 connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
1661 if (hdev->bus != BUS_USB)
1662 connect_mask &= ~HID_CONNECT_HIDDEV;
1663 if (hid_hiddev(hdev))
1664 connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1665
1666 if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1667 connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1668 hdev->claimed |= HID_CLAIMED_INPUT;
1669
1670 if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1671 !hdev->hiddev_connect(hdev,
1672 connect_mask & HID_CONNECT_HIDDEV_FORCE))
1673 hdev->claimed |= HID_CLAIMED_HIDDEV;
1674 if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1675 hdev->claimed |= HID_CLAIMED_HIDRAW;
1676
1677 if (connect_mask & HID_CONNECT_DRIVER)
1678 hdev->claimed |= HID_CLAIMED_DRIVER;
1679
1680 /* Drivers with the ->raw_event callback set are not required to connect
1681 * to any other listener. */
1682 if (!hdev->claimed && !hdev->driver->raw_event) {
1683 hid_err(hdev, "device has no listeners, quitting\n");
1684 return -ENODEV;
1685 }
1686
1687 if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1688 (connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1689 hdev->ff_init(hdev);
1690
1691 len = 0;
1692 if (hdev->claimed & HID_CLAIMED_INPUT)
1693 len += sprintf(buf + len, "input");
1694 if (hdev->claimed & HID_CLAIMED_HIDDEV)
1695 len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1696 ((struct hiddev *)hdev->hiddev)->minor);
1697 if (hdev->claimed & HID_CLAIMED_HIDRAW)
1698 len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1699 ((struct hidraw *)hdev->hidraw)->minor);
1700
1701 type = "Device";
1702 for (i = 0; i < hdev->maxcollection; i++) {
1703 struct hid_collection *col = &hdev->collection[i];
1704 if (col->type == HID_COLLECTION_APPLICATION &&
1705 (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1706 (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1707 type = types[col->usage & 0xffff];
1708 break;
1709 }
1710 }
1711
1712 switch (hdev->bus) {
1713 case BUS_USB:
1714 bus = "USB";
1715 break;
1716 case BUS_BLUETOOTH:
1717 bus = "BLUETOOTH";
1718 break;
1719 case BUS_I2C:
1720 bus = "I2C";
1721 break;
1722 default:
1723 bus = "<UNKNOWN>";
1724 }
1725
1726 ret = device_create_file(&hdev->dev, &dev_attr_country);
1727 if (ret)
1728 hid_warn(hdev,
1729 "can't create sysfs country code attribute err: %d\n", ret);
1730
1731 hid_info(hdev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1732 buf, bus, hdev->version >> 8, hdev->version & 0xff,
1733 type, hdev->name, hdev->phys);
1734
1735 return 0;
1736}
1737EXPORT_SYMBOL_GPL(hid_connect);
1738
1739void hid_disconnect(struct hid_device *hdev)
1740{
1741 device_remove_file(&hdev->dev, &dev_attr_country);
1742 if (hdev->claimed & HID_CLAIMED_INPUT)
1743 hidinput_disconnect(hdev);
1744 if (hdev->claimed & HID_CLAIMED_HIDDEV)
1745 hdev->hiddev_disconnect(hdev);
1746 if (hdev->claimed & HID_CLAIMED_HIDRAW)
1747 hidraw_disconnect(hdev);
1748 hdev->claimed = 0;
1749}
1750EXPORT_SYMBOL_GPL(hid_disconnect);
1751
1752/**
1753 * hid_hw_start - start underlying HW
1754 * @hdev: hid device
1755 * @connect_mask: which outputs to connect, see HID_CONNECT_*
1756 *
1757 * Call this in probe function *after* hid_parse. This will setup HW
1758 * buffers and start the device (if not defeirred to device open).
1759 * hid_hw_stop must be called if this was successful.
1760 */
1761int hid_hw_start(struct hid_device *hdev, unsigned int connect_mask)
1762{
1763 int error;
1764
1765 error = hdev->ll_driver->start(hdev);
1766 if (error)
1767 return error;
1768
1769 if (connect_mask) {
1770 error = hid_connect(hdev, connect_mask);
1771 if (error) {
1772 hdev->ll_driver->stop(hdev);
1773 return error;
1774 }
1775 }
1776
1777 return 0;
1778}
1779EXPORT_SYMBOL_GPL(hid_hw_start);
1780
1781/**
1782 * hid_hw_stop - stop underlying HW
1783 * @hdev: hid device
1784 *
1785 * This is usually called from remove function or from probe when something
1786 * failed and hid_hw_start was called already.
1787 */
1788void hid_hw_stop(struct hid_device *hdev)
1789{
1790 hid_disconnect(hdev);
1791 hdev->ll_driver->stop(hdev);
1792}
1793EXPORT_SYMBOL_GPL(hid_hw_stop);
1794
1795/**
1796 * hid_hw_open - signal underlying HW to start delivering events
1797 * @hdev: hid device
1798 *
1799 * Tell underlying HW to start delivering events from the device.
1800 * This function should be called sometime after successful call
1801 * to hid_hiw_start().
1802 */
1803int hid_hw_open(struct hid_device *hdev)
1804{
1805 int ret;
1806
1807 ret = mutex_lock_killable(&hdev->ll_open_lock);
1808 if (ret)
1809 return ret;
1810
1811 if (!hdev->ll_open_count++) {
1812 ret = hdev->ll_driver->open(hdev);
1813 if (ret)
1814 hdev->ll_open_count--;
1815 }
1816
1817 mutex_unlock(&hdev->ll_open_lock);
1818 return ret;
1819}
1820EXPORT_SYMBOL_GPL(hid_hw_open);
1821
1822/**
1823 * hid_hw_close - signal underlaying HW to stop delivering events
1824 *
1825 * @hdev: hid device
1826 *
1827 * This function indicates that we are not interested in the events
1828 * from this device anymore. Delivery of events may or may not stop,
1829 * depending on the number of users still outstanding.
1830 */
1831void hid_hw_close(struct hid_device *hdev)
1832{
1833 mutex_lock(&hdev->ll_open_lock);
1834 if (!--hdev->ll_open_count)
1835 hdev->ll_driver->close(hdev);
1836 mutex_unlock(&hdev->ll_open_lock);
1837}
1838EXPORT_SYMBOL_GPL(hid_hw_close);
1839
1840struct hid_dynid {
1841 struct list_head list;
1842 struct hid_device_id id;
1843};
1844
1845/**
1846 * store_new_id - add a new HID device ID to this driver and re-probe devices
1847 * @driver: target device driver
1848 * @buf: buffer for scanning device ID data
1849 * @count: input size
1850 *
1851 * Adds a new dynamic hid device ID to this driver,
1852 * and causes the driver to probe for all devices again.
1853 */
1854static ssize_t new_id_store(struct device_driver *drv, const char *buf,
1855 size_t count)
1856{
1857 struct hid_driver *hdrv = to_hid_driver(drv);
1858 struct hid_dynid *dynid;
1859 __u32 bus, vendor, product;
1860 unsigned long driver_data = 0;
1861 int ret;
1862
1863 ret = sscanf(buf, "%x %x %x %lx",
1864 &bus, &vendor, &product, &driver_data);
1865 if (ret < 3)
1866 return -EINVAL;
1867
1868 dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1869 if (!dynid)
1870 return -ENOMEM;
1871
1872 dynid->id.bus = bus;
1873 dynid->id.group = HID_GROUP_ANY;
1874 dynid->id.vendor = vendor;
1875 dynid->id.product = product;
1876 dynid->id.driver_data = driver_data;
1877
1878 spin_lock(&hdrv->dyn_lock);
1879 list_add_tail(&dynid->list, &hdrv->dyn_list);
1880 spin_unlock(&hdrv->dyn_lock);
1881
1882 ret = driver_attach(&hdrv->driver);
1883
1884 return ret ? : count;
1885}
1886static DRIVER_ATTR_WO(new_id);
1887
1888static struct attribute *hid_drv_attrs[] = {
1889 &driver_attr_new_id.attr,
1890 NULL,
1891};
1892ATTRIBUTE_GROUPS(hid_drv);
1893
1894static void hid_free_dynids(struct hid_driver *hdrv)
1895{
1896 struct hid_dynid *dynid, *n;
1897
1898 spin_lock(&hdrv->dyn_lock);
1899 list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1900 list_del(&dynid->list);
1901 kfree(dynid);
1902 }
1903 spin_unlock(&hdrv->dyn_lock);
1904}
1905
1906const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1907 struct hid_driver *hdrv)
1908{
1909 struct hid_dynid *dynid;
1910
1911 spin_lock(&hdrv->dyn_lock);
1912 list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1913 if (hid_match_one_id(hdev, &dynid->id)) {
1914 spin_unlock(&hdrv->dyn_lock);
1915 return &dynid->id;
1916 }
1917 }
1918 spin_unlock(&hdrv->dyn_lock);
1919
1920 return hid_match_id(hdev, hdrv->id_table);
1921}
1922EXPORT_SYMBOL_GPL(hid_match_device);
1923
1924static int hid_bus_match(struct device *dev, struct device_driver *drv)
1925{
1926 struct hid_driver *hdrv = to_hid_driver(drv);
1927 struct hid_device *hdev = to_hid_device(dev);
1928
1929 return hid_match_device(hdev, hdrv) != NULL;
1930}
1931
1932static int hid_device_probe(struct device *dev)
1933{
1934 struct hid_driver *hdrv = to_hid_driver(dev->driver);
1935 struct hid_device *hdev = to_hid_device(dev);
1936 const struct hid_device_id *id;
1937 int ret = 0;
1938
1939 if (down_interruptible(&hdev->driver_input_lock)) {
1940 ret = -EINTR;
1941 goto end;
1942 }
1943 hdev->io_started = false;
1944
1945 if (!hdev->driver) {
1946 id = hid_match_device(hdev, hdrv);
1947 if (id == NULL) {
1948 ret = -ENODEV;
1949 goto unlock;
1950 }
1951
1952 if (hdrv->match) {
1953 if (!hdrv->match(hdev, hid_ignore_special_drivers)) {
1954 ret = -ENODEV;
1955 goto unlock;
1956 }
1957 } else {
1958 /*
1959 * hid-generic implements .match(), so if
1960 * hid_ignore_special_drivers is set, we can safely
1961 * return.
1962 */
1963 if (hid_ignore_special_drivers) {
1964 ret = -ENODEV;
1965 goto unlock;
1966 }
1967 }
1968
1969 /* reset the quirks that has been previously set */
1970 hdev->quirks = hid_lookup_quirk(hdev);
1971 hdev->driver = hdrv;
1972 if (hdrv->probe) {
1973 ret = hdrv->probe(hdev, id);
1974 } else { /* default probe */
1975 ret = hid_open_report(hdev);
1976 if (!ret)
1977 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1978 }
1979 if (ret) {
1980 hid_close_report(hdev);
1981 hdev->driver = NULL;
1982 }
1983 }
1984unlock:
1985 if (!hdev->io_started)
1986 up(&hdev->driver_input_lock);
1987end:
1988 return ret;
1989}
1990
1991static int hid_device_remove(struct device *dev)
1992{
1993 struct hid_device *hdev = to_hid_device(dev);
1994 struct hid_driver *hdrv;
1995 int ret = 0;
1996
1997 if (down_interruptible(&hdev->driver_input_lock)) {
1998 ret = -EINTR;
1999 goto end;
2000 }
2001 hdev->io_started = false;
2002
2003 hdrv = hdev->driver;
2004 if (hdrv) {
2005 if (hdrv->remove)
2006 hdrv->remove(hdev);
2007 else /* default remove */
2008 hid_hw_stop(hdev);
2009 hid_close_report(hdev);
2010 hdev->driver = NULL;
2011 }
2012
2013 if (!hdev->io_started)
2014 up(&hdev->driver_input_lock);
2015end:
2016 return ret;
2017}
2018
2019static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
2020 char *buf)
2021{
2022 struct hid_device *hdev = container_of(dev, struct hid_device, dev);
2023
2024 return scnprintf(buf, PAGE_SIZE, "hid:b%04Xg%04Xv%08Xp%08X\n",
2025 hdev->bus, hdev->group, hdev->vendor, hdev->product);
2026}
2027static DEVICE_ATTR_RO(modalias);
2028
2029static struct attribute *hid_dev_attrs[] = {
2030 &dev_attr_modalias.attr,
2031 NULL,
2032};
2033static struct bin_attribute *hid_dev_bin_attrs[] = {
2034 &dev_bin_attr_report_desc,
2035 NULL
2036};
2037static const struct attribute_group hid_dev_group = {
2038 .attrs = hid_dev_attrs,
2039 .bin_attrs = hid_dev_bin_attrs,
2040};
2041__ATTRIBUTE_GROUPS(hid_dev);
2042
2043static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
2044{
2045 struct hid_device *hdev = to_hid_device(dev);
2046
2047 if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
2048 hdev->bus, hdev->vendor, hdev->product))
2049 return -ENOMEM;
2050
2051 if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
2052 return -ENOMEM;
2053
2054 if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
2055 return -ENOMEM;
2056
2057 if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
2058 return -ENOMEM;
2059
2060 if (add_uevent_var(env, "MODALIAS=hid:b%04Xg%04Xv%08Xp%08X",
2061 hdev->bus, hdev->group, hdev->vendor, hdev->product))
2062 return -ENOMEM;
2063
2064 return 0;
2065}
2066
2067struct bus_type hid_bus_type = {
2068 .name = "hid",
2069 .dev_groups = hid_dev_groups,
2070 .drv_groups = hid_drv_groups,
2071 .match = hid_bus_match,
2072 .probe = hid_device_probe,
2073 .remove = hid_device_remove,
2074 .uevent = hid_uevent,
2075};
2076EXPORT_SYMBOL(hid_bus_type);
2077
2078int hid_add_device(struct hid_device *hdev)
2079{
2080 static atomic_t id = ATOMIC_INIT(0);
2081 int ret;
2082
2083 if (WARN_ON(hdev->status & HID_STAT_ADDED))
2084 return -EBUSY;
2085
2086 hdev->quirks = hid_lookup_quirk(hdev);
2087
2088 /* we need to kill them here, otherwise they will stay allocated to
2089 * wait for coming driver */
2090 if (hid_ignore(hdev))
2091 return -ENODEV;
2092
2093 /*
2094 * Check for the mandatory transport channel.
2095 */
2096 if (!hdev->ll_driver->raw_request) {
2097 hid_err(hdev, "transport driver missing .raw_request()\n");
2098 return -EINVAL;
2099 }
2100
2101 /*
2102 * Read the device report descriptor once and use as template
2103 * for the driver-specific modifications.
2104 */
2105 ret = hdev->ll_driver->parse(hdev);
2106 if (ret)
2107 return ret;
2108 if (!hdev->dev_rdesc)
2109 return -ENODEV;
2110
2111 /*
2112 * Scan generic devices for group information
2113 */
2114 if (hid_ignore_special_drivers) {
2115 hdev->group = HID_GROUP_GENERIC;
2116 } else if (!hdev->group &&
2117 !(hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)) {
2118 ret = hid_scan_report(hdev);
2119 if (ret)
2120 hid_warn(hdev, "bad device descriptor (%d)\n", ret);
2121 }
2122
2123 /* XXX hack, any other cleaner solution after the driver core
2124 * is converted to allow more than 20 bytes as the device name? */
2125 dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
2126 hdev->vendor, hdev->product, atomic_inc_return(&id));
2127
2128 hid_debug_register(hdev, dev_name(&hdev->dev));
2129 ret = device_add(&hdev->dev);
2130 if (!ret)
2131 hdev->status |= HID_STAT_ADDED;
2132 else
2133 hid_debug_unregister(hdev);
2134
2135 return ret;
2136}
2137EXPORT_SYMBOL_GPL(hid_add_device);
2138
2139/**
2140 * hid_allocate_device - allocate new hid device descriptor
2141 *
2142 * Allocate and initialize hid device, so that hid_destroy_device might be
2143 * used to free it.
2144 *
2145 * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
2146 * error value.
2147 */
2148struct hid_device *hid_allocate_device(void)
2149{
2150 struct hid_device *hdev;
2151 int ret = -ENOMEM;
2152
2153 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2154 if (hdev == NULL)
2155 return ERR_PTR(ret);
2156
2157 device_initialize(&hdev->dev);
2158 hdev->dev.release = hid_device_release;
2159 hdev->dev.bus = &hid_bus_type;
2160 device_enable_async_suspend(&hdev->dev);
2161
2162 hid_close_report(hdev);
2163
2164 init_waitqueue_head(&hdev->debug_wait);
2165 INIT_LIST_HEAD(&hdev->debug_list);
2166 spin_lock_init(&hdev->debug_list_lock);
2167 sema_init(&hdev->driver_input_lock, 1);
2168 mutex_init(&hdev->ll_open_lock);
2169
2170 return hdev;
2171}
2172EXPORT_SYMBOL_GPL(hid_allocate_device);
2173
2174static void hid_remove_device(struct hid_device *hdev)
2175{
2176 if (hdev->status & HID_STAT_ADDED) {
2177 device_del(&hdev->dev);
2178 hid_debug_unregister(hdev);
2179 hdev->status &= ~HID_STAT_ADDED;
2180 }
2181 kfree(hdev->dev_rdesc);
2182 hdev->dev_rdesc = NULL;
2183 hdev->dev_rsize = 0;
2184}
2185
2186/**
2187 * hid_destroy_device - free previously allocated device
2188 *
2189 * @hdev: hid device
2190 *
2191 * If you allocate hid_device through hid_allocate_device, you should ever
2192 * free by this function.
2193 */
2194void hid_destroy_device(struct hid_device *hdev)
2195{
2196 hid_remove_device(hdev);
2197 put_device(&hdev->dev);
2198}
2199EXPORT_SYMBOL_GPL(hid_destroy_device);
2200
2201
2202static int __hid_bus_reprobe_drivers(struct device *dev, void *data)
2203{
2204 struct hid_driver *hdrv = data;
2205 struct hid_device *hdev = to_hid_device(dev);
2206
2207 if (hdev->driver == hdrv &&
2208 !hdrv->match(hdev, hid_ignore_special_drivers))
2209 return device_reprobe(dev);
2210
2211 return 0;
2212}
2213
2214static int __hid_bus_driver_added(struct device_driver *drv, void *data)
2215{
2216 struct hid_driver *hdrv = to_hid_driver(drv);
2217
2218 if (hdrv->match) {
2219 bus_for_each_dev(&hid_bus_type, NULL, hdrv,
2220 __hid_bus_reprobe_drivers);
2221 }
2222
2223 return 0;
2224}
2225
2226static int __bus_removed_driver(struct device_driver *drv, void *data)
2227{
2228 return bus_rescan_devices(&hid_bus_type);
2229}
2230
2231int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
2232 const char *mod_name)
2233{
2234 int ret;
2235
2236 hdrv->driver.name = hdrv->name;
2237 hdrv->driver.bus = &hid_bus_type;
2238 hdrv->driver.owner = owner;
2239 hdrv->driver.mod_name = mod_name;
2240
2241 INIT_LIST_HEAD(&hdrv->dyn_list);
2242 spin_lock_init(&hdrv->dyn_lock);
2243
2244 ret = driver_register(&hdrv->driver);
2245
2246 if (ret == 0)
2247 bus_for_each_drv(&hid_bus_type, NULL, NULL,
2248 __hid_bus_driver_added);
2249
2250 return ret;
2251}
2252EXPORT_SYMBOL_GPL(__hid_register_driver);
2253
2254void hid_unregister_driver(struct hid_driver *hdrv)
2255{
2256 driver_unregister(&hdrv->driver);
2257 hid_free_dynids(hdrv);
2258
2259 bus_for_each_drv(&hid_bus_type, NULL, hdrv, __bus_removed_driver);
2260}
2261EXPORT_SYMBOL_GPL(hid_unregister_driver);
2262
2263int hid_check_keys_pressed(struct hid_device *hid)
2264{
2265 struct hid_input *hidinput;
2266 int i;
2267
2268 if (!(hid->claimed & HID_CLAIMED_INPUT))
2269 return 0;
2270
2271 list_for_each_entry(hidinput, &hid->inputs, list) {
2272 for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
2273 if (hidinput->input->key[i])
2274 return 1;
2275 }
2276
2277 return 0;
2278}
2279
2280EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
2281
2282static int __init hid_init(void)
2283{
2284 int ret;
2285
2286 if (hid_debug)
2287 pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
2288 "debugfs is now used for inspecting the device (report descriptor, reports)\n");
2289
2290 ret = bus_register(&hid_bus_type);
2291 if (ret) {
2292 pr_err("can't register hid bus\n");
2293 goto err;
2294 }
2295
2296 ret = hidraw_init();
2297 if (ret)
2298 goto err_bus;
2299
2300 hid_debug_init();
2301
2302 return 0;
2303err_bus:
2304 bus_unregister(&hid_bus_type);
2305err:
2306 return ret;
2307}
2308
2309static void __exit hid_exit(void)
2310{
2311 hid_debug_exit();
2312 hidraw_exit();
2313 bus_unregister(&hid_bus_type);
2314 hid_quirks_exit(HID_BUS_ANY);
2315}
2316
2317module_init(hid_init);
2318module_exit(hid_exit);
2319
2320MODULE_AUTHOR("Andreas Gal");
2321MODULE_AUTHOR("Vojtech Pavlik");
2322MODULE_AUTHOR("Jiri Kosina");
2323MODULE_LICENSE("GPL");