xref: /openbmc/linux/drivers/hid/hid-core.c (revision 7b6d864b)
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 #define DRIVER_LICENSE "GPL"
47 
48 int hid_debug = 0;
49 module_param_named(debug, hid_debug, int, 0600);
50 MODULE_PARM_DESC(debug, "toggle HID debugging messages");
51 EXPORT_SYMBOL_GPL(hid_debug);
52 
53 static int hid_ignore_special_drivers = 0;
54 module_param_named(ignore_special_drivers, hid_ignore_special_drivers, int, 0600);
55 MODULE_PARM_DESC(debug, "Ignore any special drivers and handle all devices by generic driver");
56 
57 /*
58  * Register a new report for a device.
59  */
60 
61 struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
62 {
63 	struct hid_report_enum *report_enum = device->report_enum + type;
64 	struct hid_report *report;
65 
66 	if (report_enum->report_id_hash[id])
67 		return report_enum->report_id_hash[id];
68 
69 	report = kzalloc(sizeof(struct hid_report), GFP_KERNEL);
70 	if (!report)
71 		return NULL;
72 
73 	if (id != 0)
74 		report_enum->numbered = 1;
75 
76 	report->id = id;
77 	report->type = type;
78 	report->size = 0;
79 	report->device = device;
80 	report_enum->report_id_hash[id] = report;
81 
82 	list_add_tail(&report->list, &report_enum->report_list);
83 
84 	return report;
85 }
86 EXPORT_SYMBOL_GPL(hid_register_report);
87 
88 /*
89  * Register a new field for this report.
90  */
91 
92 static struct hid_field *hid_register_field(struct hid_report *report, unsigned usages, unsigned values)
93 {
94 	struct hid_field *field;
95 	int i;
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 	for (i = 0; i < usages; i++)
115 		field->usage[i].usage_index = i;
116 
117 	return field;
118 }
119 
120 /*
121  * Open a collection. The type/usage is pushed on the stack.
122  */
123 
124 static int open_collection(struct hid_parser *parser, unsigned type)
125 {
126 	struct hid_collection *collection;
127 	unsigned usage;
128 
129 	usage = parser->local.usage[0];
130 
131 	if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
132 		hid_err(parser->device, "collection stack overflow\n");
133 		return -EINVAL;
134 	}
135 
136 	if (parser->device->maxcollection == parser->device->collection_size) {
137 		collection = kmalloc(sizeof(struct hid_collection) *
138 				parser->device->collection_size * 2, GFP_KERNEL);
139 		if (collection == NULL) {
140 			hid_err(parser->device, "failed to reallocate collection array\n");
141 			return -ENOMEM;
142 		}
143 		memcpy(collection, parser->device->collection,
144 			sizeof(struct hid_collection) *
145 			parser->device->collection_size);
146 		memset(collection + parser->device->collection_size, 0,
147 			sizeof(struct hid_collection) *
148 			parser->device->collection_size);
149 		kfree(parser->device->collection);
150 		parser->device->collection = collection;
151 		parser->device->collection_size *= 2;
152 	}
153 
154 	parser->collection_stack[parser->collection_stack_ptr++] =
155 		parser->device->maxcollection;
156 
157 	collection = parser->device->collection +
158 		parser->device->maxcollection++;
159 	collection->type = type;
160 	collection->usage = usage;
161 	collection->level = parser->collection_stack_ptr - 1;
162 
163 	if (type == HID_COLLECTION_APPLICATION)
164 		parser->device->maxapplication++;
165 
166 	return 0;
167 }
168 
169 /*
170  * Close a collection.
171  */
172 
173 static int close_collection(struct hid_parser *parser)
174 {
175 	if (!parser->collection_stack_ptr) {
176 		hid_err(parser->device, "collection stack underflow\n");
177 		return -EINVAL;
178 	}
179 	parser->collection_stack_ptr--;
180 	return 0;
181 }
182 
183 /*
184  * Climb up the stack, search for the specified collection type
185  * and return the usage.
186  */
187 
188 static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
189 {
190 	struct hid_collection *collection = parser->device->collection;
191 	int n;
192 
193 	for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
194 		unsigned index = parser->collection_stack[n];
195 		if (collection[index].type == type)
196 			return collection[index].usage;
197 	}
198 	return 0; /* we know nothing about this usage type */
199 }
200 
201 /*
202  * Add a usage to the temporary parser table.
203  */
204 
205 static int hid_add_usage(struct hid_parser *parser, unsigned usage)
206 {
207 	if (parser->local.usage_index >= HID_MAX_USAGES) {
208 		hid_err(parser->device, "usage index exceeded\n");
209 		return -1;
210 	}
211 	parser->local.usage[parser->local.usage_index] = usage;
212 	parser->local.collection_index[parser->local.usage_index] =
213 		parser->collection_stack_ptr ?
214 		parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
215 	parser->local.usage_index++;
216 	return 0;
217 }
218 
219 /*
220  * Register a new field for this report.
221  */
222 
223 static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
224 {
225 	struct hid_report *report;
226 	struct hid_field *field;
227 	int usages;
228 	unsigned offset;
229 	int i;
230 
231 	report = hid_register_report(parser->device, report_type, parser->global.report_id);
232 	if (!report) {
233 		hid_err(parser->device, "hid_register_report failed\n");
234 		return -1;
235 	}
236 
237 	/* Handle both signed and unsigned cases properly */
238 	if ((parser->global.logical_minimum < 0 &&
239 		parser->global.logical_maximum <
240 		parser->global.logical_minimum) ||
241 		(parser->global.logical_minimum >= 0 &&
242 		(__u32)parser->global.logical_maximum <
243 		(__u32)parser->global.logical_minimum)) {
244 		dbg_hid("logical range invalid 0x%x 0x%x\n",
245 			parser->global.logical_minimum,
246 			parser->global.logical_maximum);
247 		return -1;
248 	}
249 
250 	offset = report->size;
251 	report->size += parser->global.report_size * parser->global.report_count;
252 
253 	if (!parser->local.usage_index) /* Ignore padding fields */
254 		return 0;
255 
256 	usages = max_t(int, parser->local.usage_index, parser->global.report_count);
257 
258 	field = hid_register_field(report, usages, parser->global.report_count);
259 	if (!field)
260 		return 0;
261 
262 	field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
263 	field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
264 	field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
265 
266 	for (i = 0; i < usages; i++) {
267 		int j = i;
268 		/* Duplicate the last usage we parsed if we have excess values */
269 		if (i >= parser->local.usage_index)
270 			j = parser->local.usage_index - 1;
271 		field->usage[i].hid = parser->local.usage[j];
272 		field->usage[i].collection_index =
273 			parser->local.collection_index[j];
274 	}
275 
276 	field->maxusage = usages;
277 	field->flags = flags;
278 	field->report_offset = offset;
279 	field->report_type = report_type;
280 	field->report_size = parser->global.report_size;
281 	field->report_count = parser->global.report_count;
282 	field->logical_minimum = parser->global.logical_minimum;
283 	field->logical_maximum = parser->global.logical_maximum;
284 	field->physical_minimum = parser->global.physical_minimum;
285 	field->physical_maximum = parser->global.physical_maximum;
286 	field->unit_exponent = parser->global.unit_exponent;
287 	field->unit = parser->global.unit;
288 
289 	return 0;
290 }
291 
292 /*
293  * Read data value from item.
294  */
295 
296 static u32 item_udata(struct hid_item *item)
297 {
298 	switch (item->size) {
299 	case 1: return item->data.u8;
300 	case 2: return item->data.u16;
301 	case 4: return item->data.u32;
302 	}
303 	return 0;
304 }
305 
306 static s32 item_sdata(struct hid_item *item)
307 {
308 	switch (item->size) {
309 	case 1: return item->data.s8;
310 	case 2: return item->data.s16;
311 	case 4: return item->data.s32;
312 	}
313 	return 0;
314 }
315 
316 /*
317  * Process a global item.
318  */
319 
320 static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)
321 {
322 	__u32 raw_value;
323 	switch (item->tag) {
324 	case HID_GLOBAL_ITEM_TAG_PUSH:
325 
326 		if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
327 			hid_err(parser->device, "global environment stack overflow\n");
328 			return -1;
329 		}
330 
331 		memcpy(parser->global_stack + parser->global_stack_ptr++,
332 			&parser->global, sizeof(struct hid_global));
333 		return 0;
334 
335 	case HID_GLOBAL_ITEM_TAG_POP:
336 
337 		if (!parser->global_stack_ptr) {
338 			hid_err(parser->device, "global environment stack underflow\n");
339 			return -1;
340 		}
341 
342 		memcpy(&parser->global, parser->global_stack +
343 			--parser->global_stack_ptr, sizeof(struct hid_global));
344 		return 0;
345 
346 	case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
347 		parser->global.usage_page = item_udata(item);
348 		return 0;
349 
350 	case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
351 		parser->global.logical_minimum = item_sdata(item);
352 		return 0;
353 
354 	case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
355 		if (parser->global.logical_minimum < 0)
356 			parser->global.logical_maximum = item_sdata(item);
357 		else
358 			parser->global.logical_maximum = item_udata(item);
359 		return 0;
360 
361 	case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
362 		parser->global.physical_minimum = item_sdata(item);
363 		return 0;
364 
365 	case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
366 		if (parser->global.physical_minimum < 0)
367 			parser->global.physical_maximum = item_sdata(item);
368 		else
369 			parser->global.physical_maximum = item_udata(item);
370 		return 0;
371 
372 	case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
373 		/* Units exponent negative numbers are given through a
374 		 * two's complement.
375 		 * See "6.2.2.7 Global Items" for more information. */
376 		raw_value = item_udata(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 			hid_err(parser->device, "report_id 0 is invalid\n");
409 			return -1;
410 		}
411 		return 0;
412 
413 	default:
414 		hid_err(parser->device, "unknown global tag 0x%x\n", item->tag);
415 		return -1;
416 	}
417 }
418 
419 /*
420  * Process a local item.
421  */
422 
423 static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)
424 {
425 	__u32 data;
426 	unsigned n;
427 
428 	data = item_udata(item);
429 
430 	switch (item->tag) {
431 	case HID_LOCAL_ITEM_TAG_DELIMITER:
432 
433 		if (data) {
434 			/*
435 			 * We treat items before the first delimiter
436 			 * as global to all usage sets (branch 0).
437 			 * In the moment we process only these global
438 			 * items and the first delimiter set.
439 			 */
440 			if (parser->local.delimiter_depth != 0) {
441 				hid_err(parser->device, "nested delimiters\n");
442 				return -1;
443 			}
444 			parser->local.delimiter_depth++;
445 			parser->local.delimiter_branch++;
446 		} else {
447 			if (parser->local.delimiter_depth < 1) {
448 				hid_err(parser->device, "bogus close delimiter\n");
449 				return -1;
450 			}
451 			parser->local.delimiter_depth--;
452 		}
453 		return 1;
454 
455 	case HID_LOCAL_ITEM_TAG_USAGE:
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 		return hid_add_usage(parser, data);
466 
467 	case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
468 
469 		if (parser->local.delimiter_branch > 1) {
470 			dbg_hid("alternative usage ignored\n");
471 			return 0;
472 		}
473 
474 		if (item->size <= 2)
475 			data = (parser->global.usage_page << 16) + data;
476 
477 		parser->local.usage_minimum = data;
478 		return 0;
479 
480 	case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
481 
482 		if (parser->local.delimiter_branch > 1) {
483 			dbg_hid("alternative usage ignored\n");
484 			return 0;
485 		}
486 
487 		if (item->size <= 2)
488 			data = (parser->global.usage_page << 16) + data;
489 
490 		for (n = parser->local.usage_minimum; n <= data; n++)
491 			if (hid_add_usage(parser, n)) {
492 				dbg_hid("hid_add_usage failed\n");
493 				return -1;
494 			}
495 		return 0;
496 
497 	default:
498 
499 		dbg_hid("unknown local item tag 0x%x\n", item->tag);
500 		return 0;
501 	}
502 	return 0;
503 }
504 
505 /*
506  * Process a main item.
507  */
508 
509 static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
510 {
511 	__u32 data;
512 	int ret;
513 
514 	data = item_udata(item);
515 
516 	switch (item->tag) {
517 	case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
518 		ret = open_collection(parser, data & 0xff);
519 		break;
520 	case HID_MAIN_ITEM_TAG_END_COLLECTION:
521 		ret = close_collection(parser);
522 		break;
523 	case HID_MAIN_ITEM_TAG_INPUT:
524 		ret = hid_add_field(parser, HID_INPUT_REPORT, data);
525 		break;
526 	case HID_MAIN_ITEM_TAG_OUTPUT:
527 		ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
528 		break;
529 	case HID_MAIN_ITEM_TAG_FEATURE:
530 		ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
531 		break;
532 	default:
533 		hid_err(parser->device, "unknown main item tag 0x%x\n", item->tag);
534 		ret = 0;
535 	}
536 
537 	memset(&parser->local, 0, sizeof(parser->local));	/* Reset the local parser environment */
538 
539 	return ret;
540 }
541 
542 /*
543  * Process a reserved item.
544  */
545 
546 static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)
547 {
548 	dbg_hid("reserved item type, tag 0x%x\n", item->tag);
549 	return 0;
550 }
551 
552 /*
553  * Free a report and all registered fields. The field->usage and
554  * field->value table's are allocated behind the field, so we need
555  * only to free(field) itself.
556  */
557 
558 static void hid_free_report(struct hid_report *report)
559 {
560 	unsigned n;
561 
562 	for (n = 0; n < report->maxfield; n++)
563 		kfree(report->field[n]);
564 	kfree(report);
565 }
566 
567 /*
568  * Close report. This function returns the device
569  * state to the point prior to hid_open_report().
570  */
571 static void hid_close_report(struct hid_device *device)
572 {
573 	unsigned i, j;
574 
575 	for (i = 0; i < HID_REPORT_TYPES; i++) {
576 		struct hid_report_enum *report_enum = device->report_enum + i;
577 
578 		for (j = 0; j < 256; j++) {
579 			struct hid_report *report = report_enum->report_id_hash[j];
580 			if (report)
581 				hid_free_report(report);
582 		}
583 		memset(report_enum, 0, sizeof(*report_enum));
584 		INIT_LIST_HEAD(&report_enum->report_list);
585 	}
586 
587 	kfree(device->rdesc);
588 	device->rdesc = NULL;
589 	device->rsize = 0;
590 
591 	kfree(device->collection);
592 	device->collection = NULL;
593 	device->collection_size = 0;
594 	device->maxcollection = 0;
595 	device->maxapplication = 0;
596 
597 	device->status &= ~HID_STAT_PARSED;
598 }
599 
600 /*
601  * Free a device structure, all reports, and all fields.
602  */
603 
604 static void hid_device_release(struct device *dev)
605 {
606 	struct hid_device *hid = container_of(dev, struct hid_device, dev);
607 
608 	hid_close_report(hid);
609 	kfree(hid->dev_rdesc);
610 	kfree(hid);
611 }
612 
613 /*
614  * Fetch a report description item from the data stream. We support long
615  * items, though they are not used yet.
616  */
617 
618 static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
619 {
620 	u8 b;
621 
622 	if ((end - start) <= 0)
623 		return NULL;
624 
625 	b = *start++;
626 
627 	item->type = (b >> 2) & 3;
628 	item->tag  = (b >> 4) & 15;
629 
630 	if (item->tag == HID_ITEM_TAG_LONG) {
631 
632 		item->format = HID_ITEM_FORMAT_LONG;
633 
634 		if ((end - start) < 2)
635 			return NULL;
636 
637 		item->size = *start++;
638 		item->tag  = *start++;
639 
640 		if ((end - start) < item->size)
641 			return NULL;
642 
643 		item->data.longdata = start;
644 		start += item->size;
645 		return start;
646 	}
647 
648 	item->format = HID_ITEM_FORMAT_SHORT;
649 	item->size = b & 3;
650 
651 	switch (item->size) {
652 	case 0:
653 		return start;
654 
655 	case 1:
656 		if ((end - start) < 1)
657 			return NULL;
658 		item->data.u8 = *start++;
659 		return start;
660 
661 	case 2:
662 		if ((end - start) < 2)
663 			return NULL;
664 		item->data.u16 = get_unaligned_le16(start);
665 		start = (__u8 *)((__le16 *)start + 1);
666 		return start;
667 
668 	case 3:
669 		item->size++;
670 		if ((end - start) < 4)
671 			return NULL;
672 		item->data.u32 = get_unaligned_le32(start);
673 		start = (__u8 *)((__le32 *)start + 1);
674 		return start;
675 	}
676 
677 	return NULL;
678 }
679 
680 static void hid_scan_usage(struct hid_device *hid, u32 usage)
681 {
682 	if (usage == HID_DG_CONTACTID)
683 		hid->group = HID_GROUP_MULTITOUCH;
684 }
685 
686 /*
687  * Scan a report descriptor before the device is added to the bus.
688  * Sets device groups and other properties that determine what driver
689  * to load.
690  */
691 static int hid_scan_report(struct hid_device *hid)
692 {
693 	unsigned int page = 0, delim = 0;
694 	__u8 *start = hid->dev_rdesc;
695 	__u8 *end = start + hid->dev_rsize;
696 	unsigned int u, u_min = 0, u_max = 0;
697 	struct hid_item item;
698 
699 	hid->group = HID_GROUP_GENERIC;
700 	while ((start = fetch_item(start, end, &item)) != NULL) {
701 		if (item.format != HID_ITEM_FORMAT_SHORT)
702 			return -EINVAL;
703 		if (item.type == HID_ITEM_TYPE_GLOBAL) {
704 			if (item.tag == HID_GLOBAL_ITEM_TAG_USAGE_PAGE)
705 				page = item_udata(&item) << 16;
706 		} else if (item.type == HID_ITEM_TYPE_LOCAL) {
707 			if (delim > 1)
708 				break;
709 			u = item_udata(&item);
710 			if (item.size <= 2)
711 				u += page;
712 			switch (item.tag) {
713 			case HID_LOCAL_ITEM_TAG_DELIMITER:
714 				delim += !!u;
715 				break;
716 			case HID_LOCAL_ITEM_TAG_USAGE:
717 				hid_scan_usage(hid, u);
718 				break;
719 			case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
720 				u_min = u;
721 				break;
722 			case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
723 				u_max = u;
724 				for (u = u_min; u <= u_max; u++)
725 					hid_scan_usage(hid, u);
726 				break;
727 			}
728 		} else if (page == HID_UP_SENSOR &&
729 			item.type == HID_ITEM_TYPE_MAIN &&
730 			item.tag == HID_MAIN_ITEM_TAG_BEGIN_COLLECTION &&
731 			(item_udata(&item) & 0xff) == HID_COLLECTION_PHYSICAL)
732 			hid->group = HID_GROUP_SENSOR_HUB;
733 	}
734 
735 	return 0;
736 }
737 
738 /**
739  * hid_parse_report - parse device report
740  *
741  * @device: hid device
742  * @start: report start
743  * @size: report size
744  *
745  * Allocate the device report as read by the bus driver. This function should
746  * only be called from parse() in ll drivers.
747  */
748 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size)
749 {
750 	hid->dev_rdesc = kmemdup(start, size, GFP_KERNEL);
751 	if (!hid->dev_rdesc)
752 		return -ENOMEM;
753 	hid->dev_rsize = size;
754 	return 0;
755 }
756 EXPORT_SYMBOL_GPL(hid_parse_report);
757 
758 /**
759  * hid_open_report - open a driver-specific device report
760  *
761  * @device: hid device
762  *
763  * Parse a report description into a hid_device structure. Reports are
764  * enumerated, fields are attached to these reports.
765  * 0 returned on success, otherwise nonzero error value.
766  *
767  * This function (or the equivalent hid_parse() macro) should only be
768  * called from probe() in drivers, before starting the device.
769  */
770 int hid_open_report(struct hid_device *device)
771 {
772 	struct hid_parser *parser;
773 	struct hid_item item;
774 	unsigned int size;
775 	__u8 *start;
776 	__u8 *buf;
777 	__u8 *end;
778 	int ret;
779 	static int (*dispatch_type[])(struct hid_parser *parser,
780 				      struct hid_item *item) = {
781 		hid_parser_main,
782 		hid_parser_global,
783 		hid_parser_local,
784 		hid_parser_reserved
785 	};
786 
787 	if (WARN_ON(device->status & HID_STAT_PARSED))
788 		return -EBUSY;
789 
790 	start = device->dev_rdesc;
791 	if (WARN_ON(!start))
792 		return -ENODEV;
793 	size = device->dev_rsize;
794 
795 	buf = kmemdup(start, size, GFP_KERNEL);
796 	if (buf == NULL)
797 		return -ENOMEM;
798 
799 	if (device->driver->report_fixup)
800 		start = device->driver->report_fixup(device, buf, &size);
801 	else
802 		start = buf;
803 
804 	start = kmemdup(start, size, GFP_KERNEL);
805 	kfree(buf);
806 	if (start == NULL)
807 		return -ENOMEM;
808 
809 	device->rdesc = start;
810 	device->rsize = size;
811 
812 	parser = vzalloc(sizeof(struct hid_parser));
813 	if (!parser) {
814 		ret = -ENOMEM;
815 		goto err;
816 	}
817 
818 	parser->device = device;
819 
820 	end = start + size;
821 
822 	device->collection = kcalloc(HID_DEFAULT_NUM_COLLECTIONS,
823 				     sizeof(struct hid_collection), GFP_KERNEL);
824 	if (!device->collection) {
825 		ret = -ENOMEM;
826 		goto err;
827 	}
828 	device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
829 
830 	ret = -EINVAL;
831 	while ((start = fetch_item(start, end, &item)) != NULL) {
832 
833 		if (item.format != HID_ITEM_FORMAT_SHORT) {
834 			hid_err(device, "unexpected long global item\n");
835 			goto err;
836 		}
837 
838 		if (dispatch_type[item.type](parser, &item)) {
839 			hid_err(device, "item %u %u %u %u parsing failed\n",
840 				item.format, (unsigned)item.size,
841 				(unsigned)item.type, (unsigned)item.tag);
842 			goto err;
843 		}
844 
845 		if (start == end) {
846 			if (parser->collection_stack_ptr) {
847 				hid_err(device, "unbalanced collection at end of report description\n");
848 				goto err;
849 			}
850 			if (parser->local.delimiter_depth) {
851 				hid_err(device, "unbalanced delimiter at end of report description\n");
852 				goto err;
853 			}
854 			vfree(parser);
855 			device->status |= HID_STAT_PARSED;
856 			return 0;
857 		}
858 	}
859 
860 	hid_err(device, "item fetching failed at offset %d\n", (int)(end - start));
861 err:
862 	vfree(parser);
863 	hid_close_report(device);
864 	return ret;
865 }
866 EXPORT_SYMBOL_GPL(hid_open_report);
867 
868 /*
869  * Convert a signed n-bit integer to signed 32-bit integer. Common
870  * cases are done through the compiler, the screwed things has to be
871  * done by hand.
872  */
873 
874 static s32 snto32(__u32 value, unsigned n)
875 {
876 	switch (n) {
877 	case 8:  return ((__s8)value);
878 	case 16: return ((__s16)value);
879 	case 32: return ((__s32)value);
880 	}
881 	return value & (1 << (n - 1)) ? value | (-1 << n) : value;
882 }
883 
884 s32 hid_snto32(__u32 value, unsigned n)
885 {
886 	return snto32(value, n);
887 }
888 EXPORT_SYMBOL_GPL(hid_snto32);
889 
890 /*
891  * Convert a signed 32-bit integer to a signed n-bit integer.
892  */
893 
894 static u32 s32ton(__s32 value, unsigned n)
895 {
896 	s32 a = value >> (n - 1);
897 	if (a && a != -1)
898 		return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
899 	return value & ((1 << n) - 1);
900 }
901 
902 /*
903  * Extract/implement a data field from/to a little endian report (bit array).
904  *
905  * Code sort-of follows HID spec:
906  *     http://www.usb.org/developers/devclass_docs/HID1_11.pdf
907  *
908  * While the USB HID spec allows unlimited length bit fields in "report
909  * descriptors", most devices never use more than 16 bits.
910  * One model of UPS is claimed to report "LINEV" as a 32-bit field.
911  * Search linux-kernel and linux-usb-devel archives for "hid-core extract".
912  */
913 
914 static __u32 extract(const struct hid_device *hid, __u8 *report,
915 		     unsigned offset, unsigned n)
916 {
917 	u64 x;
918 
919 	if (n > 32)
920 		hid_warn(hid, "extract() called with n (%d) > 32! (%s)\n",
921 			 n, current->comm);
922 
923 	report += offset >> 3;  /* adjust byte index */
924 	offset &= 7;            /* now only need bit offset into one byte */
925 	x = get_unaligned_le64(report);
926 	x = (x >> offset) & ((1ULL << n) - 1);  /* extract bit field */
927 	return (u32) x;
928 }
929 
930 /*
931  * "implement" : set bits in a little endian bit stream.
932  * Same concepts as "extract" (see comments above).
933  * The data mangled in the bit stream remains in little endian
934  * order the whole time. It make more sense to talk about
935  * endianness of register values by considering a register
936  * a "cached" copy of the little endiad bit stream.
937  */
938 static void implement(const struct hid_device *hid, __u8 *report,
939 		      unsigned offset, unsigned n, __u32 value)
940 {
941 	u64 x;
942 	u64 m = (1ULL << n) - 1;
943 
944 	if (n > 32)
945 		hid_warn(hid, "%s() called with n (%d) > 32! (%s)\n",
946 			 __func__, n, current->comm);
947 
948 	if (value > m)
949 		hid_warn(hid, "%s() called with too large value %d! (%s)\n",
950 			 __func__, value, current->comm);
951 	WARN_ON(value > m);
952 	value &= m;
953 
954 	report += offset >> 3;
955 	offset &= 7;
956 
957 	x = get_unaligned_le64(report);
958 	x &= ~(m << offset);
959 	x |= ((u64)value) << offset;
960 	put_unaligned_le64(x, report);
961 }
962 
963 /*
964  * Search an array for a value.
965  */
966 
967 static int search(__s32 *array, __s32 value, unsigned n)
968 {
969 	while (n--) {
970 		if (*array++ == value)
971 			return 0;
972 	}
973 	return -1;
974 }
975 
976 /**
977  * hid_match_report - check if driver's raw_event should be called
978  *
979  * @hid: hid device
980  * @report_type: type to match against
981  *
982  * compare hid->driver->report_table->report_type to report->type
983  */
984 static int hid_match_report(struct hid_device *hid, struct hid_report *report)
985 {
986 	const struct hid_report_id *id = hid->driver->report_table;
987 
988 	if (!id) /* NULL means all */
989 		return 1;
990 
991 	for (; id->report_type != HID_TERMINATOR; id++)
992 		if (id->report_type == HID_ANY_ID ||
993 				id->report_type == report->type)
994 			return 1;
995 	return 0;
996 }
997 
998 /**
999  * hid_match_usage - check if driver's event should be called
1000  *
1001  * @hid: hid device
1002  * @usage: usage to match against
1003  *
1004  * compare hid->driver->usage_table->usage_{type,code} to
1005  * usage->usage_{type,code}
1006  */
1007 static int hid_match_usage(struct hid_device *hid, struct hid_usage *usage)
1008 {
1009 	const struct hid_usage_id *id = hid->driver->usage_table;
1010 
1011 	if (!id) /* NULL means all */
1012 		return 1;
1013 
1014 	for (; id->usage_type != HID_ANY_ID - 1; id++)
1015 		if ((id->usage_hid == HID_ANY_ID ||
1016 				id->usage_hid == usage->hid) &&
1017 				(id->usage_type == HID_ANY_ID ||
1018 				id->usage_type == usage->type) &&
1019 				(id->usage_code == HID_ANY_ID ||
1020 				 id->usage_code == usage->code))
1021 			return 1;
1022 	return 0;
1023 }
1024 
1025 static void hid_process_event(struct hid_device *hid, struct hid_field *field,
1026 		struct hid_usage *usage, __s32 value, int interrupt)
1027 {
1028 	struct hid_driver *hdrv = hid->driver;
1029 	int ret;
1030 
1031 	if (!list_empty(&hid->debug_list))
1032 		hid_dump_input(hid, usage, value);
1033 
1034 	if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
1035 		ret = hdrv->event(hid, field, usage, value);
1036 		if (ret != 0) {
1037 			if (ret < 0)
1038 				hid_err(hid, "%s's event failed with %d\n",
1039 						hdrv->name, ret);
1040 			return;
1041 		}
1042 	}
1043 
1044 	if (hid->claimed & HID_CLAIMED_INPUT)
1045 		hidinput_hid_event(hid, field, usage, value);
1046 	if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
1047 		hid->hiddev_hid_event(hid, field, usage, value);
1048 }
1049 
1050 /*
1051  * Analyse a received field, and fetch the data from it. The field
1052  * content is stored for next report processing (we do differential
1053  * reporting to the layer).
1054  */
1055 
1056 static void hid_input_field(struct hid_device *hid, struct hid_field *field,
1057 			    __u8 *data, int interrupt)
1058 {
1059 	unsigned n;
1060 	unsigned count = field->report_count;
1061 	unsigned offset = field->report_offset;
1062 	unsigned size = field->report_size;
1063 	__s32 min = field->logical_minimum;
1064 	__s32 max = field->logical_maximum;
1065 	__s32 *value;
1066 
1067 	value = kmalloc(sizeof(__s32) * count, GFP_ATOMIC);
1068 	if (!value)
1069 		return;
1070 
1071 	for (n = 0; n < count; n++) {
1072 
1073 		value[n] = min < 0 ?
1074 			snto32(extract(hid, data, offset + n * size, size),
1075 			       size) :
1076 			extract(hid, data, offset + n * size, size);
1077 
1078 		/* Ignore report if ErrorRollOver */
1079 		if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&
1080 		    value[n] >= min && value[n] <= max &&
1081 		    field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
1082 			goto exit;
1083 	}
1084 
1085 	for (n = 0; n < count; n++) {
1086 
1087 		if (HID_MAIN_ITEM_VARIABLE & field->flags) {
1088 			hid_process_event(hid, field, &field->usage[n], value[n], interrupt);
1089 			continue;
1090 		}
1091 
1092 		if (field->value[n] >= min && field->value[n] <= max
1093 			&& field->usage[field->value[n] - min].hid
1094 			&& search(value, field->value[n], count))
1095 				hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt);
1096 
1097 		if (value[n] >= min && value[n] <= max
1098 			&& field->usage[value[n] - min].hid
1099 			&& search(field->value, value[n], count))
1100 				hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt);
1101 	}
1102 
1103 	memcpy(field->value, value, count * sizeof(__s32));
1104 exit:
1105 	kfree(value);
1106 }
1107 
1108 /*
1109  * Output the field into the report.
1110  */
1111 
1112 static void hid_output_field(const struct hid_device *hid,
1113 			     struct hid_field *field, __u8 *data)
1114 {
1115 	unsigned count = field->report_count;
1116 	unsigned offset = field->report_offset;
1117 	unsigned size = field->report_size;
1118 	unsigned n;
1119 
1120 	for (n = 0; n < count; n++) {
1121 		if (field->logical_minimum < 0)	/* signed values */
1122 			implement(hid, data, offset + n * size, size,
1123 				  s32ton(field->value[n], size));
1124 		else				/* unsigned values */
1125 			implement(hid, data, offset + n * size, size,
1126 				  field->value[n]);
1127 	}
1128 }
1129 
1130 /*
1131  * Create a report.
1132  */
1133 
1134 void hid_output_report(struct hid_report *report, __u8 *data)
1135 {
1136 	unsigned n;
1137 
1138 	if (report->id > 0)
1139 		*data++ = report->id;
1140 
1141 	memset(data, 0, ((report->size - 1) >> 3) + 1);
1142 	for (n = 0; n < report->maxfield; n++)
1143 		hid_output_field(report->device, report->field[n], data);
1144 }
1145 EXPORT_SYMBOL_GPL(hid_output_report);
1146 
1147 /*
1148  * Set a field value. The report this field belongs to has to be
1149  * created and transferred to the device, to set this value in the
1150  * device.
1151  */
1152 
1153 int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
1154 {
1155 	unsigned size = field->report_size;
1156 
1157 	hid_dump_input(field->report->device, field->usage + offset, value);
1158 
1159 	if (offset >= field->report_count) {
1160 		hid_err(field->report->device, "offset (%d) exceeds report_count (%d)\n",
1161 				offset, field->report_count);
1162 		return -1;
1163 	}
1164 	if (field->logical_minimum < 0) {
1165 		if (value != snto32(s32ton(value, size), size)) {
1166 			hid_err(field->report->device, "value %d is out of range\n", value);
1167 			return -1;
1168 		}
1169 	}
1170 	field->value[offset] = value;
1171 	return 0;
1172 }
1173 EXPORT_SYMBOL_GPL(hid_set_field);
1174 
1175 static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
1176 		const u8 *data)
1177 {
1178 	struct hid_report *report;
1179 	unsigned int n = 0;	/* Normally report number is 0 */
1180 
1181 	/* Device uses numbered reports, data[0] is report number */
1182 	if (report_enum->numbered)
1183 		n = *data;
1184 
1185 	report = report_enum->report_id_hash[n];
1186 	if (report == NULL)
1187 		dbg_hid("undefined report_id %u received\n", n);
1188 
1189 	return report;
1190 }
1191 
1192 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
1193 		int interrupt)
1194 {
1195 	struct hid_report_enum *report_enum = hid->report_enum + type;
1196 	struct hid_report *report;
1197 	struct hid_driver *hdrv;
1198 	unsigned int a;
1199 	int rsize, csize = size;
1200 	u8 *cdata = data;
1201 	int ret = 0;
1202 
1203 	report = hid_get_report(report_enum, data);
1204 	if (!report)
1205 		goto out;
1206 
1207 	if (report_enum->numbered) {
1208 		cdata++;
1209 		csize--;
1210 	}
1211 
1212 	rsize = ((report->size - 1) >> 3) + 1;
1213 
1214 	if (rsize > HID_MAX_BUFFER_SIZE)
1215 		rsize = HID_MAX_BUFFER_SIZE;
1216 
1217 	if (csize < rsize) {
1218 		dbg_hid("report %d is too short, (%d < %d)\n", report->id,
1219 				csize, rsize);
1220 		memset(cdata + csize, 0, rsize - csize);
1221 	}
1222 
1223 	if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
1224 		hid->hiddev_report_event(hid, report);
1225 	if (hid->claimed & HID_CLAIMED_HIDRAW) {
1226 		ret = hidraw_report_event(hid, data, size);
1227 		if (ret)
1228 			goto out;
1229 	}
1230 
1231 	if (hid->claimed != HID_CLAIMED_HIDRAW) {
1232 		for (a = 0; a < report->maxfield; a++)
1233 			hid_input_field(hid, report->field[a], cdata, interrupt);
1234 		hdrv = hid->driver;
1235 		if (hdrv && hdrv->report)
1236 			hdrv->report(hid, report);
1237 	}
1238 
1239 	if (hid->claimed & HID_CLAIMED_INPUT)
1240 		hidinput_report_event(hid, report);
1241 out:
1242 	return ret;
1243 }
1244 EXPORT_SYMBOL_GPL(hid_report_raw_event);
1245 
1246 /**
1247  * hid_input_report - report data from lower layer (usb, bt...)
1248  *
1249  * @hid: hid device
1250  * @type: HID report type (HID_*_REPORT)
1251  * @data: report contents
1252  * @size: size of data parameter
1253  * @interrupt: distinguish between interrupt and control transfers
1254  *
1255  * This is data entry for lower layers.
1256  */
1257 int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
1258 {
1259 	struct hid_report_enum *report_enum;
1260 	struct hid_driver *hdrv;
1261 	struct hid_report *report;
1262 	int ret = 0;
1263 
1264 	if (!hid)
1265 		return -ENODEV;
1266 
1267 	if (down_trylock(&hid->driver_input_lock))
1268 		return -EBUSY;
1269 
1270 	if (!hid->driver) {
1271 		ret = -ENODEV;
1272 		goto unlock;
1273 	}
1274 	report_enum = hid->report_enum + type;
1275 	hdrv = hid->driver;
1276 
1277 	if (!size) {
1278 		dbg_hid("empty report\n");
1279 		ret = -1;
1280 		goto unlock;
1281 	}
1282 
1283 	/* Avoid unnecessary overhead if debugfs is disabled */
1284 	if (!list_empty(&hid->debug_list))
1285 		hid_dump_report(hid, type, data, size);
1286 
1287 	report = hid_get_report(report_enum, data);
1288 
1289 	if (!report) {
1290 		ret = -1;
1291 		goto unlock;
1292 	}
1293 
1294 	if (hdrv && hdrv->raw_event && hid_match_report(hid, report)) {
1295 		ret = hdrv->raw_event(hid, report, data, size);
1296 		if (ret < 0) {
1297 			ret = ret < 0 ? ret : 0;
1298 			goto unlock;
1299 		}
1300 	}
1301 
1302 	ret = hid_report_raw_event(hid, type, data, size, interrupt);
1303 
1304 unlock:
1305 	up(&hid->driver_input_lock);
1306 	return ret;
1307 }
1308 EXPORT_SYMBOL_GPL(hid_input_report);
1309 
1310 static bool hid_match_one_id(struct hid_device *hdev,
1311 		const struct hid_device_id *id)
1312 {
1313 	return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
1314 		(id->group == HID_GROUP_ANY || id->group == hdev->group) &&
1315 		(id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
1316 		(id->product == HID_ANY_ID || id->product == hdev->product);
1317 }
1318 
1319 const struct hid_device_id *hid_match_id(struct hid_device *hdev,
1320 		const struct hid_device_id *id)
1321 {
1322 	for (; id->bus; id++)
1323 		if (hid_match_one_id(hdev, id))
1324 			return id;
1325 
1326 	return NULL;
1327 }
1328 
1329 static const struct hid_device_id hid_hiddev_list[] = {
1330 	{ HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS) },
1331 	{ HID_USB_DEVICE(USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1) },
1332 	{ }
1333 };
1334 
1335 static bool hid_hiddev(struct hid_device *hdev)
1336 {
1337 	return !!hid_match_id(hdev, hid_hiddev_list);
1338 }
1339 
1340 
1341 static ssize_t
1342 read_report_descriptor(struct file *filp, struct kobject *kobj,
1343 		struct bin_attribute *attr,
1344 		char *buf, loff_t off, size_t count)
1345 {
1346 	struct device *dev = container_of(kobj, struct device, kobj);
1347 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1348 
1349 	if (off >= hdev->rsize)
1350 		return 0;
1351 
1352 	if (off + count > hdev->rsize)
1353 		count = hdev->rsize - off;
1354 
1355 	memcpy(buf, hdev->rdesc + off, count);
1356 
1357 	return count;
1358 }
1359 
1360 static struct bin_attribute dev_bin_attr_report_desc = {
1361 	.attr = { .name = "report_descriptor", .mode = 0444 },
1362 	.read = read_report_descriptor,
1363 	.size = HID_MAX_DESCRIPTOR_SIZE,
1364 };
1365 
1366 int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
1367 {
1368 	static const char *types[] = { "Device", "Pointer", "Mouse", "Device",
1369 		"Joystick", "Gamepad", "Keyboard", "Keypad",
1370 		"Multi-Axis Controller"
1371 	};
1372 	const char *type, *bus;
1373 	char buf[64];
1374 	unsigned int i;
1375 	int len;
1376 	int ret;
1377 
1378 	if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
1379 		connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
1380 	if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
1381 		connect_mask |= HID_CONNECT_HIDINPUT_FORCE;
1382 	if (hdev->bus != BUS_USB)
1383 		connect_mask &= ~HID_CONNECT_HIDDEV;
1384 	if (hid_hiddev(hdev))
1385 		connect_mask |= HID_CONNECT_HIDDEV_FORCE;
1386 
1387 	if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,
1388 				connect_mask & HID_CONNECT_HIDINPUT_FORCE))
1389 		hdev->claimed |= HID_CLAIMED_INPUT;
1390 
1391 	if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
1392 			!hdev->hiddev_connect(hdev,
1393 				connect_mask & HID_CONNECT_HIDDEV_FORCE))
1394 		hdev->claimed |= HID_CLAIMED_HIDDEV;
1395 	if ((connect_mask & HID_CONNECT_HIDRAW) && !hidraw_connect(hdev))
1396 		hdev->claimed |= HID_CLAIMED_HIDRAW;
1397 
1398 	/* Drivers with the ->raw_event callback set are not required to connect
1399 	 * to any other listener. */
1400 	if (!hdev->claimed && !hdev->driver->raw_event) {
1401 		hid_err(hdev, "device has no listeners, quitting\n");
1402 		return -ENODEV;
1403 	}
1404 
1405 	if ((hdev->claimed & HID_CLAIMED_INPUT) &&
1406 			(connect_mask & HID_CONNECT_FF) && hdev->ff_init)
1407 		hdev->ff_init(hdev);
1408 
1409 	len = 0;
1410 	if (hdev->claimed & HID_CLAIMED_INPUT)
1411 		len += sprintf(buf + len, "input");
1412 	if (hdev->claimed & HID_CLAIMED_HIDDEV)
1413 		len += sprintf(buf + len, "%shiddev%d", len ? "," : "",
1414 				hdev->minor);
1415 	if (hdev->claimed & HID_CLAIMED_HIDRAW)
1416 		len += sprintf(buf + len, "%shidraw%d", len ? "," : "",
1417 				((struct hidraw *)hdev->hidraw)->minor);
1418 
1419 	type = "Device";
1420 	for (i = 0; i < hdev->maxcollection; i++) {
1421 		struct hid_collection *col = &hdev->collection[i];
1422 		if (col->type == HID_COLLECTION_APPLICATION &&
1423 		   (col->usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
1424 		   (col->usage & 0xffff) < ARRAY_SIZE(types)) {
1425 			type = types[col->usage & 0xffff];
1426 			break;
1427 		}
1428 	}
1429 
1430 	switch (hdev->bus) {
1431 	case BUS_USB:
1432 		bus = "USB";
1433 		break;
1434 	case BUS_BLUETOOTH:
1435 		bus = "BLUETOOTH";
1436 		break;
1437 	default:
1438 		bus = "<UNKNOWN>";
1439 	}
1440 
1441 	ret = device_create_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1442 	if (ret)
1443 		hid_warn(hdev,
1444 			 "can't create sysfs report descriptor attribute err: %d\n", ret);
1445 
1446 	hid_info(hdev, "%s: %s HID v%x.%02x %s [%s] on %s\n",
1447 		 buf, bus, hdev->version >> 8, hdev->version & 0xff,
1448 		 type, hdev->name, hdev->phys);
1449 
1450 	return 0;
1451 }
1452 EXPORT_SYMBOL_GPL(hid_connect);
1453 
1454 void hid_disconnect(struct hid_device *hdev)
1455 {
1456 	device_remove_bin_file(&hdev->dev, &dev_bin_attr_report_desc);
1457 	if (hdev->claimed & HID_CLAIMED_INPUT)
1458 		hidinput_disconnect(hdev);
1459 	if (hdev->claimed & HID_CLAIMED_HIDDEV)
1460 		hdev->hiddev_disconnect(hdev);
1461 	if (hdev->claimed & HID_CLAIMED_HIDRAW)
1462 		hidraw_disconnect(hdev);
1463 }
1464 EXPORT_SYMBOL_GPL(hid_disconnect);
1465 
1466 /*
1467  * A list of devices for which there is a specialized driver on HID bus.
1468  *
1469  * Please note that for multitouch devices (driven by hid-multitouch driver),
1470  * there is a proper autodetection and autoloading in place (based on presence
1471  * of HID_DG_CONTACTID), so those devices don't need to be added to this list,
1472  * as we are doing the right thing in hid_scan_usage().
1473  *
1474  * Autodetection for (USB) HID sensor hubs exists too. If a collection of type
1475  * physical is found inside a usage page of type sensor, hid-sensor-hub will be
1476  * used as a driver. See hid_scan_report().
1477  */
1478 static const struct hid_device_id hid_have_special_driver[] = {
1479 	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
1480 	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
1481 	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
1482 	{ HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
1483 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
1484 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE) },
1485 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD) },
1486 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
1487 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
1488 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
1489 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
1490 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
1491 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
1492 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
1493 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
1494 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
1495 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
1496 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
1497 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ANSI) },
1498 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_ISO) },
1499 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_MINI_JIS) },
1500 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ANSI) },
1501 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_ISO) },
1502 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_JIS) },
1503 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
1504 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
1505 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
1506 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL) },
1507 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL2) },
1508 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL3) },
1509 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
1510 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL5) },
1511 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI) },
1512 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ISO) },
1513 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_JIS) },
1514 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
1515 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
1516 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
1517 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
1518 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
1519 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
1520 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
1521 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
1522 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
1523 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
1524 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
1525 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
1526 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
1527 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
1528 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
1529 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
1530 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
1531 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
1532 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI) },
1533 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO) },
1534 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS) },
1535 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ANSI) },
1536 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ISO) },
1537 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_JIS) },
1538 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI) },
1539 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ISO) },
1540 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_JIS) },
1541 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI) },
1542 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO) },
1543 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS) },
1544 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI) },
1545 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ISO) },
1546 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_JIS) },
1547 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI) },
1548 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO) },
1549 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS) },
1550 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI) },
1551 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ISO) },
1552 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_JIS) },
1553 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI) },
1554 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO) },
1555 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_JIS) },
1556 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI) },
1557 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO) },
1558 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
1559 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
1560 	{ HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) },
1561 	{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
1562 	{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
1563 	{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
1564 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
1565 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
1566 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
1567 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
1568 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
1569 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
1570 	{ HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
1571 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
1572 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
1573 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
1574 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4) },
1575 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
1576 	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
1577 	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011) },
1578 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
1579 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0009) },
1580 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0030) },
1581 	{ HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
1582 	{ HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
1583 	{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
1584 	{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
1585 	{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
1586 	{ HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
1587 	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
1588 	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
1589 	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
1590 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
1591 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD) },
1592 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
1593 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
1594 	{ HID_USB_DEVICE(USB_VENDOR_ID_HUION, USB_DEVICE_ID_HUION_580) },
1595 	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD) },
1596 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
1597 	{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
1598 	{ HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
1599 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_GENIUS_GILA_GAMING_MOUSE) },
1600 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
1601 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_I405X) },
1602 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_MOUSEPEN_I608X) },
1603 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X) },
1604 	{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
1605 	{ HID_USB_DEVICE(USB_VENDOR_ID_LCPOWER, USB_DEVICE_ID_LCPOWER_LC1000 ) },
1606 #if IS_ENABLED(CONFIG_HID_LENOVO_TPKBD)
1607 	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
1608 #endif
1609 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
1610 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
1611 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
1612 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RECEIVER) },
1613 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_HARMONY_PS3) },
1614 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_DESKTOP) },
1615 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_EDGE) },
1616 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_DINOVO_MINI) },
1617 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_ELITE_KBD) },
1618 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_CORDLESS_DESKTOP_LX500) },
1619 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_EXTREME_3D) },
1620 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WHEEL) },
1621 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD_CORD) },
1622 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD) },
1623 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2_2) },
1624 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_F3D) },
1625 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WINGMAN_FFG ) },
1626 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FORCE3D_PRO) },
1627 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_FLIGHT_SYSTEM_G940) },
1628 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL) },
1629 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2) },
1630 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DFP_WHEEL) },
1631 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DFGT_WHEEL) },
1632 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G25_WHEEL) },
1633 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G27_WHEEL) },
1634 #if IS_ENABLED(CONFIG_HID_LOGITECH_DJ)
1635 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER) },
1636 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2) },
1637 #endif
1638 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_WII_WHEEL) },
1639 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
1640 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
1641 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
1642 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
1643 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
1644 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_COMFORT_MOUSE_4500) },
1645 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV) },
1646 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K) },
1647 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K_JP) },
1648 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_LK6K) },
1649 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
1650 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_DIGITAL_MEDIA_3K) },
1651 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
1652 	{ HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
1653 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
1654 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1) },
1655 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2) },
1656 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3) },
1657 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4) },
1658 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5) },
1659 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6) },
1660 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7) },
1661 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8) },
1662 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9) },
1663 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10) },
1664 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11) },
1665 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12) },
1666 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13) },
1667 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14) },
1668 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15) },
1669 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16) },
1670 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17) },
1671 	{ HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
1672 	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
1673 	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
1674 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
1675 	{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
1676 #if IS_ENABLED(CONFIG_HID_ROCCAT)
1677 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
1678 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
1679 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
1680 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPLUS) },
1681 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE) },
1682 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KOVAPLUS) },
1683 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) },
1684 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRED) },
1685 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_PYRA_WIRELESS) },
1686 	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) },
1687 #endif
1688 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_PS1000) },
1689 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
1690 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
1691 	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
1692 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_BUZZ_CONTROLLER) },
1693 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_WIRELESS_BUZZ_CONTROLLER) },
1694 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_BDREMOTE) },
1695 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1696 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_NAVIGATION_CONTROLLER) },
1697 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
1698 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
1699 	{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGP_MOUSE) },
1700 	{ HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
1701 	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
1702 	{ HID_USB_DEVICE(USB_VENDOR_ID_THINGM, USB_DEVICE_ID_BLINK1) },
1703 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
1704 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
1705 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323) },
1706 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324) },
1707 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },
1708 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653) },
1709 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },
1710 	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a) },
1711 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_TIVO, USB_DEVICE_ID_TIVO_SLIDE_BT) },
1712 	{ HID_USB_DEVICE(USB_VENDOR_ID_TIVO, USB_DEVICE_ID_TIVO_SLIDE) },
1713 	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
1714 	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, USB_DEVICE_ID_TOPSEED2_RF_COMBO) },
1715 	{ HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
1716 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
1717 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
1718 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
1719 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
1720 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
1721 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) },
1722 	{ HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) },
1723 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
1724 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SUPER_JOY_BOX_3) },
1725 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD) },
1726 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_3_PRO) },
1727 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_DUAL_BOX_PRO) },
1728 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_5_PRO) },
1729 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
1730 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
1731 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
1732 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
1733 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_Q_PAD) },
1734 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_PID_0038) },
1735 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
1736 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
1737 	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET) },
1738 	{ HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE) },
1739 	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
1740 	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
1741 	{ HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
1742 
1743 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
1744 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1745 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
1746 	{ }
1747 };
1748 
1749 struct hid_dynid {
1750 	struct list_head list;
1751 	struct hid_device_id id;
1752 };
1753 
1754 /**
1755  * store_new_id - add a new HID device ID to this driver and re-probe devices
1756  * @driver: target device driver
1757  * @buf: buffer for scanning device ID data
1758  * @count: input size
1759  *
1760  * Adds a new dynamic hid device ID to this driver,
1761  * and causes the driver to probe for all devices again.
1762  */
1763 static ssize_t store_new_id(struct device_driver *drv, const char *buf,
1764 		size_t count)
1765 {
1766 	struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1767 	struct hid_dynid *dynid;
1768 	__u32 bus, vendor, product;
1769 	unsigned long driver_data = 0;
1770 	int ret;
1771 
1772 	ret = sscanf(buf, "%x %x %x %lx",
1773 			&bus, &vendor, &product, &driver_data);
1774 	if (ret < 3)
1775 		return -EINVAL;
1776 
1777 	dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
1778 	if (!dynid)
1779 		return -ENOMEM;
1780 
1781 	dynid->id.bus = bus;
1782 	dynid->id.group = HID_GROUP_ANY;
1783 	dynid->id.vendor = vendor;
1784 	dynid->id.product = product;
1785 	dynid->id.driver_data = driver_data;
1786 
1787 	spin_lock(&hdrv->dyn_lock);
1788 	list_add_tail(&dynid->list, &hdrv->dyn_list);
1789 	spin_unlock(&hdrv->dyn_lock);
1790 
1791 	ret = driver_attach(&hdrv->driver);
1792 
1793 	return ret ? : count;
1794 }
1795 static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
1796 
1797 static void hid_free_dynids(struct hid_driver *hdrv)
1798 {
1799 	struct hid_dynid *dynid, *n;
1800 
1801 	spin_lock(&hdrv->dyn_lock);
1802 	list_for_each_entry_safe(dynid, n, &hdrv->dyn_list, list) {
1803 		list_del(&dynid->list);
1804 		kfree(dynid);
1805 	}
1806 	spin_unlock(&hdrv->dyn_lock);
1807 }
1808 
1809 static const struct hid_device_id *hid_match_device(struct hid_device *hdev,
1810 		struct hid_driver *hdrv)
1811 {
1812 	struct hid_dynid *dynid;
1813 
1814 	spin_lock(&hdrv->dyn_lock);
1815 	list_for_each_entry(dynid, &hdrv->dyn_list, list) {
1816 		if (hid_match_one_id(hdev, &dynid->id)) {
1817 			spin_unlock(&hdrv->dyn_lock);
1818 			return &dynid->id;
1819 		}
1820 	}
1821 	spin_unlock(&hdrv->dyn_lock);
1822 
1823 	return hid_match_id(hdev, hdrv->id_table);
1824 }
1825 
1826 static int hid_bus_match(struct device *dev, struct device_driver *drv)
1827 {
1828 	struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
1829 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1830 
1831 	return hid_match_device(hdev, hdrv) != NULL;
1832 }
1833 
1834 static int hid_device_probe(struct device *dev)
1835 {
1836 	struct hid_driver *hdrv = container_of(dev->driver,
1837 			struct hid_driver, driver);
1838 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1839 	const struct hid_device_id *id;
1840 	int ret = 0;
1841 
1842 	if (down_interruptible(&hdev->driver_lock))
1843 		return -EINTR;
1844 	if (down_interruptible(&hdev->driver_input_lock)) {
1845 		ret = -EINTR;
1846 		goto unlock_driver_lock;
1847 	}
1848 	hdev->io_started = false;
1849 
1850 	if (!hdev->driver) {
1851 		id = hid_match_device(hdev, hdrv);
1852 		if (id == NULL) {
1853 			ret = -ENODEV;
1854 			goto unlock;
1855 		}
1856 
1857 		hdev->driver = hdrv;
1858 		if (hdrv->probe) {
1859 			ret = hdrv->probe(hdev, id);
1860 		} else { /* default probe */
1861 			ret = hid_open_report(hdev);
1862 			if (!ret)
1863 				ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1864 		}
1865 		if (ret) {
1866 			hid_close_report(hdev);
1867 			hdev->driver = NULL;
1868 		}
1869 	}
1870 unlock:
1871 	if (!hdev->io_started)
1872 		up(&hdev->driver_input_lock);
1873 unlock_driver_lock:
1874 	up(&hdev->driver_lock);
1875 	return ret;
1876 }
1877 
1878 static int hid_device_remove(struct device *dev)
1879 {
1880 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1881 	struct hid_driver *hdrv;
1882 	int ret = 0;
1883 
1884 	if (down_interruptible(&hdev->driver_lock))
1885 		return -EINTR;
1886 	if (down_interruptible(&hdev->driver_input_lock)) {
1887 		ret = -EINTR;
1888 		goto unlock_driver_lock;
1889 	}
1890 	hdev->io_started = false;
1891 
1892 	hdrv = hdev->driver;
1893 	if (hdrv) {
1894 		if (hdrv->remove)
1895 			hdrv->remove(hdev);
1896 		else /* default remove */
1897 			hid_hw_stop(hdev);
1898 		hid_close_report(hdev);
1899 		hdev->driver = NULL;
1900 	}
1901 
1902 	if (!hdev->io_started)
1903 		up(&hdev->driver_input_lock);
1904 unlock_driver_lock:
1905 	up(&hdev->driver_lock);
1906 	return ret;
1907 }
1908 
1909 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
1910 			     char *buf)
1911 {
1912 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1913 	int len;
1914 
1915 	len = snprintf(buf, PAGE_SIZE, "hid:b%04Xg%04Xv%08Xp%08X\n",
1916 		       hdev->bus, hdev->group, hdev->vendor, hdev->product);
1917 
1918 	return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
1919 }
1920 
1921 static struct device_attribute hid_dev_attrs[] = {
1922 	__ATTR_RO(modalias),
1923 	__ATTR_NULL,
1924 };
1925 
1926 static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
1927 {
1928 	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1929 
1930 	if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
1931 			hdev->bus, hdev->vendor, hdev->product))
1932 		return -ENOMEM;
1933 
1934 	if (add_uevent_var(env, "HID_NAME=%s", hdev->name))
1935 		return -ENOMEM;
1936 
1937 	if (add_uevent_var(env, "HID_PHYS=%s", hdev->phys))
1938 		return -ENOMEM;
1939 
1940 	if (add_uevent_var(env, "HID_UNIQ=%s", hdev->uniq))
1941 		return -ENOMEM;
1942 
1943 	if (add_uevent_var(env, "MODALIAS=hid:b%04Xg%04Xv%08Xp%08X",
1944 			   hdev->bus, hdev->group, hdev->vendor, hdev->product))
1945 		return -ENOMEM;
1946 
1947 	return 0;
1948 }
1949 
1950 static struct bus_type hid_bus_type = {
1951 	.name		= "hid",
1952 	.dev_attrs	= hid_dev_attrs,
1953 	.match		= hid_bus_match,
1954 	.probe		= hid_device_probe,
1955 	.remove		= hid_device_remove,
1956 	.uevent		= hid_uevent,
1957 };
1958 
1959 /* a list of devices that shouldn't be handled by HID core at all */
1960 static const struct hid_device_id hid_ignore_list[] = {
1961 	{ HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_FLAIR) },
1962 	{ HID_USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_ACECAD_302) },
1963 	{ HID_USB_DEVICE(USB_VENDOR_ID_ADS_TECH, USB_DEVICE_ID_ADS_TECH_RADIO_SI470X) },
1964 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_01) },
1965 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_10) },
1966 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_20) },
1967 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_21) },
1968 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_22) },
1969 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_23) },
1970 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
1971 	{ HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
1972 	{ HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
1973 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
1974 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
1975 	{ HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
1976 	{ HID_USB_DEVICE(USB_VENDOR_ID_AXENTIA, USB_DEVICE_ID_AXENTIA_FM_RADIO) },
1977 	{ HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
1978 	{ HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },
1979 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_RADIO_SI470X) },
1980 	{ HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM109) },
1981 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_HIDCOM) },
1982 	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_ULTRAMOUSE) },
1983 	{ HID_USB_DEVICE(USB_VENDOR_ID_DEALEXTREAME, USB_DEVICE_ID_DEALEXTREAME_RADIO_SI4701) },
1984 	{ HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) },
1985 	{ HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
1986 	{ HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
1987 	{ HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x000a) },
1988 	{ HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
1989 	{ HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
1990 	{ HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
1991 	{ HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) },
1992 	{ HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
1993 	{ HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0004) },
1994 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_4_PHIDGETSERVO_30) },
1995 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_1_PHIDGETSERVO_30) },
1996 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_0_4_IF_KIT) },
1997 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_16_16_IF_KIT) },
1998 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_8_8_8_IF_KIT) },
1999 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_7_IF_KIT) },
2000 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_0_8_8_IF_KIT) },
2001 	{ HID_USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_PHIDGET_MOTORCONTROL) },
2002 	{ HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_SUPER_Q2) },
2003 	{ HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_GOGOPEN) },
2004 	{ HID_USB_DEVICE(USB_VENDOR_ID_GOTOP, USB_DEVICE_ID_PENPOWER) },
2005 	{ HID_USB_DEVICE(USB_VENDOR_ID_GRETAGMACBETH, USB_DEVICE_ID_GRETAGMACBETH_HUEY) },
2006 	{ HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE) },
2007 	{ HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB) },
2008 	{ HID_USB_DEVICE(USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_RADIOSHARK) },
2009 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_90) },
2010 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_100) },
2011 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_101) },
2012 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_103) },
2013 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_104) },
2014 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_105) },
2015 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_106) },
2016 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_107) },
2017 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_108) },
2018 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_200) },
2019 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_201) },
2020 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_202) },
2021 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_203) },
2022 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_204) },
2023 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_205) },
2024 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_206) },
2025 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_207) },
2026 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_300) },
2027 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_301) },
2028 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_302) },
2029 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_303) },
2030 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_304) },
2031 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_305) },
2032 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_306) },
2033 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_307) },
2034 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_308) },
2035 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_309) },
2036 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_400) },
2037 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_401) },
2038 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_402) },
2039 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_403) },
2040 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_404) },
2041 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_405) },
2042 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_500) },
2043 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_501) },
2044 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_502) },
2045 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_503) },
2046 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_504) },
2047 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1000) },
2048 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1001) },
2049 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1002) },
2050 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1003) },
2051 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1004) },
2052 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1005) },
2053 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1006) },
2054 	{ HID_USB_DEVICE(USB_VENDOR_ID_GTCO, USB_DEVICE_ID_GTCO_1007) },
2055 	{ HID_USB_DEVICE(USB_VENDOR_ID_IMATION, USB_DEVICE_ID_DISC_STAKKA) },
2056 	{ HID_USB_DEVICE(USB_VENDOR_ID_JABRA, USB_DEVICE_ID_JABRA_SPEAK_410) },
2057 	{ HID_USB_DEVICE(USB_VENDOR_ID_JABRA, USB_DEVICE_ID_JABRA_SPEAK_510) },
2058 	{ HID_USB_DEVICE(USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO) },
2059 	{ HID_USB_DEVICE(USB_VENDOR_ID_KWORLD, USB_DEVICE_ID_KWORLD_RADIO_FM700) },
2060 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_GPEN_560) },
2061 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_KYE, 0x0058) },
2062 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY) },
2063 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_CASSY2) },
2064 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY) },
2065 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POCKETCASSY2) },
2066 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY) },
2067 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOBILECASSY2) },
2068 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYVOLTAGE) },
2069 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYCURRENT) },
2070 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTIME) },
2071 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYTEMPERATURE) },
2072 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MICROCASSYPH) },
2073 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_JWM) },
2074 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_DMMP) },
2075 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIP) },
2076 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIC) },
2077 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_UMIB) },
2078 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY) },
2079 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_XRAY2) },
2080 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_VIDEOCOM) },
2081 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOTOR) },
2082 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_COM3LAB) },
2083 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_TELEPORT) },
2084 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_NETWORKANALYSER) },
2085 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_POWERCONTROL) },
2086 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MACHINETEST) },
2087 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER) },
2088 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MOSTANALYSER2) },
2089 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_ABSESP) },
2090 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_AUTODATABUS) },
2091 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_MCT) },
2092 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HYBRID) },
2093 	{ HID_USB_DEVICE(USB_VENDOR_ID_LD, USB_DEVICE_ID_LD_HEATCONTROL) },
2094 	{ HID_USB_DEVICE(USB_VENDOR_ID_MADCATZ, USB_DEVICE_ID_MADCATZ_BEATPAD) },
2095 	{ HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1024LS) },
2096 	{ HID_USB_DEVICE(USB_VENDOR_ID_MCC, USB_DEVICE_ID_MCC_PMD1208LS) },
2097 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT1) },
2098 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICKIT2) },
2099 	{ HID_USB_DEVICE(USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR, USB_DEVICE_ID_N_S_HARMONY) },
2100 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100) },
2101 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20) },
2102 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30) },
2103 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100) },
2104 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108) },
2105 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118) },
2106 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200) },
2107 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300) },
2108 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400) },
2109 	{ HID_USB_DEVICE(USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500) },
2110 	{ HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0001) },
2111 	{ HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0002) },
2112 	{ HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0003) },
2113 	{ HID_USB_DEVICE(USB_VENDOR_ID_PANJIT, 0x0004) },
2114 	{ HID_USB_DEVICE(USB_VENDOR_ID_PHILIPS, USB_DEVICE_ID_PHILIPS_IEEE802154_DONGLE) },
2115 	{ HID_USB_DEVICE(USB_VENDOR_ID_POWERCOM, USB_DEVICE_ID_POWERCOM_UPS) },
2116 #if defined(CONFIG_MOUSE_SYNAPTICS_USB) || defined(CONFIG_MOUSE_SYNAPTICS_USB_MODULE)
2117 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP) },
2118 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_INT_TP) },
2119 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_CPAD) },
2120 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_STICK) },
2121 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_WP) },
2122 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_COMP_TP) },
2123 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_WTP) },
2124 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DPAD) },
2125 #endif
2126 	{ HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LABPRO) },
2127 	{ HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_GOTEMP) },
2128 	{ HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_SKIP) },
2129 	{ HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_CYCLOPS) },
2130 	{ HID_USB_DEVICE(USB_VENDOR_ID_VERNIER, USB_DEVICE_ID_VERNIER_LCSPEC) },
2131 	{ HID_USB_DEVICE(USB_VENDOR_ID_WACOM, HID_ANY_ID) },
2132 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_4_PHIDGETSERVO_20) },
2133 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_1_PHIDGETSERVO_20) },
2134 	{ HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_8_8_4_IF_KIT) },
2135 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
2136 	{ }
2137 };
2138 
2139 /**
2140  * hid_mouse_ignore_list - mouse devices which should not be handled by the hid layer
2141  *
2142  * There are composite devices for which we want to ignore only a certain
2143  * interface. This is a list of devices for which only the mouse interface will
2144  * be ignored. This allows a dedicated driver to take care of the interface.
2145  */
2146 static const struct hid_device_id hid_mouse_ignore_list[] = {
2147 	/* appletouch driver */
2148 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
2149 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ISO) },
2150 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ANSI) },
2151 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_ISO) },
2152 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER_JIS) },
2153 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ANSI) },
2154 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_ISO) },
2155 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER3_JIS) },
2156 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ANSI) },
2157 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_ISO) },
2158 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_JIS) },
2159 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ANSI) },
2160 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_ISO) },
2161 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER4_HF_JIS) },
2162 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ANSI) },
2163 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_ISO) },
2164 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING_JIS) },
2165 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI) },
2166 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_ISO) },
2167 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING2_JIS) },
2168 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI) },
2169 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_ISO) },
2170 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING3_JIS) },
2171 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI) },
2172 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_ISO) },
2173 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4_JIS) },
2174 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI) },
2175 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO) },
2176 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS) },
2177 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI) },
2178 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_ISO) },
2179 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5_JIS) },
2180 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI) },
2181 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO) },
2182 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS) },
2183 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI) },
2184 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_ISO) },
2185 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6_JIS) },
2186 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI) },
2187 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO) },
2188 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS) },
2189 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI) },
2190 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_ISO) },
2191 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7_JIS) },
2192 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI) },
2193 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO) },
2194 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS) },
2195 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI) },
2196 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_ISO) },
2197 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_WELLSPRING8_JIS) },
2198 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
2199 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
2200 	{ }
2201 };
2202 
2203 bool hid_ignore(struct hid_device *hdev)
2204 {
2205 	if (hdev->quirks & HID_QUIRK_NO_IGNORE)
2206 		return false;
2207 	if (hdev->quirks & HID_QUIRK_IGNORE)
2208 		return true;
2209 
2210 	switch (hdev->vendor) {
2211 	case USB_VENDOR_ID_CODEMERCS:
2212 		/* ignore all Code Mercenaries IOWarrior devices */
2213 		if (hdev->product >= USB_DEVICE_ID_CODEMERCS_IOW_FIRST &&
2214 				hdev->product <= USB_DEVICE_ID_CODEMERCS_IOW_LAST)
2215 			return true;
2216 		break;
2217 	case USB_VENDOR_ID_LOGITECH:
2218 		if (hdev->product >= USB_DEVICE_ID_LOGITECH_HARMONY_FIRST &&
2219 				hdev->product <= USB_DEVICE_ID_LOGITECH_HARMONY_LAST)
2220 			return true;
2221 		/*
2222 		 * The Keene FM transmitter USB device has the same USB ID as
2223 		 * the Logitech AudioHub Speaker, but it should ignore the hid.
2224 		 * Check if the name is that of the Keene device.
2225 		 * For reference: the name of the AudioHub is
2226 		 * "HOLTEK  AudioHub Speaker".
2227 		 */
2228 		if (hdev->product == USB_DEVICE_ID_LOGITECH_AUDIOHUB &&
2229 			!strcmp(hdev->name, "HOLTEK  B-LINK USB Audio  "))
2230 				return true;
2231 		break;
2232 	case USB_VENDOR_ID_SOUNDGRAPH:
2233 		if (hdev->product >= USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST &&
2234 		    hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
2235 			return true;
2236 		break;
2237 	case USB_VENDOR_ID_HANWANG:
2238 		if (hdev->product >= USB_DEVICE_ID_HANWANG_TABLET_FIRST &&
2239 		    hdev->product <= USB_DEVICE_ID_HANWANG_TABLET_LAST)
2240 			return true;
2241 		break;
2242 	case USB_VENDOR_ID_JESS:
2243 		if (hdev->product == USB_DEVICE_ID_JESS_YUREX &&
2244 				hdev->type == HID_TYPE_USBNONE)
2245 			return true;
2246 		break;
2247 	case USB_VENDOR_ID_DWAV:
2248 		/* These are handled by usbtouchscreen. hdev->type is probably
2249 		 * HID_TYPE_USBNONE, but we say !HID_TYPE_USBMOUSE to match
2250 		 * usbtouchscreen. */
2251 		if ((hdev->product == USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER ||
2252 		     hdev->product == USB_DEVICE_ID_DWAV_TOUCHCONTROLLER) &&
2253 		    hdev->type != HID_TYPE_USBMOUSE)
2254 			return true;
2255 		break;
2256 	case USB_VENDOR_ID_VELLEMAN:
2257 		/* These are not HID devices.  They are handled by comedi. */
2258 		if ((hdev->product >= USB_DEVICE_ID_VELLEMAN_K8055_FIRST &&
2259 		     hdev->product <= USB_DEVICE_ID_VELLEMAN_K8055_LAST) ||
2260 		    (hdev->product >= USB_DEVICE_ID_VELLEMAN_K8061_FIRST &&
2261 		     hdev->product <= USB_DEVICE_ID_VELLEMAN_K8061_LAST))
2262 			return true;
2263 		break;
2264 	case USB_VENDOR_ID_ATMEL_V_USB:
2265 		/* Masterkit MA901 usb radio based on Atmel tiny85 chip and
2266 		 * it has the same USB ID as many Atmel V-USB devices. This
2267 		 * usb radio is handled by radio-ma901.c driver so we want
2268 		 * ignore the hid. Check the name, bus, product and ignore
2269 		 * if we have MA901 usb radio.
2270 		 */
2271 		if (hdev->product == USB_DEVICE_ID_ATMEL_V_USB &&
2272 			hdev->bus == BUS_USB &&
2273 			strncmp(hdev->name, "www.masterkit.ru MA901", 22) == 0)
2274 			return true;
2275 		break;
2276 	}
2277 
2278 	if (hdev->type == HID_TYPE_USBMOUSE &&
2279 			hid_match_id(hdev, hid_mouse_ignore_list))
2280 		return true;
2281 
2282 	return !!hid_match_id(hdev, hid_ignore_list);
2283 }
2284 EXPORT_SYMBOL_GPL(hid_ignore);
2285 
2286 int hid_add_device(struct hid_device *hdev)
2287 {
2288 	static atomic_t id = ATOMIC_INIT(0);
2289 	int ret;
2290 
2291 	if (WARN_ON(hdev->status & HID_STAT_ADDED))
2292 		return -EBUSY;
2293 
2294 	/* we need to kill them here, otherwise they will stay allocated to
2295 	 * wait for coming driver */
2296 	if (hid_ignore(hdev))
2297 		return -ENODEV;
2298 
2299 	/*
2300 	 * Read the device report descriptor once and use as template
2301 	 * for the driver-specific modifications.
2302 	 */
2303 	ret = hdev->ll_driver->parse(hdev);
2304 	if (ret)
2305 		return ret;
2306 	if (!hdev->dev_rdesc)
2307 		return -ENODEV;
2308 
2309 	/*
2310 	 * Scan generic devices for group information
2311 	 */
2312 	if (hid_ignore_special_drivers ||
2313 	    !hid_match_id(hdev, hid_have_special_driver)) {
2314 		ret = hid_scan_report(hdev);
2315 		if (ret)
2316 			hid_warn(hdev, "bad device descriptor (%d)\n", ret);
2317 	}
2318 
2319 	/* XXX hack, any other cleaner solution after the driver core
2320 	 * is converted to allow more than 20 bytes as the device name? */
2321 	dev_set_name(&hdev->dev, "%04X:%04X:%04X.%04X", hdev->bus,
2322 		     hdev->vendor, hdev->product, atomic_inc_return(&id));
2323 
2324 	hid_debug_register(hdev, dev_name(&hdev->dev));
2325 	ret = device_add(&hdev->dev);
2326 	if (!ret)
2327 		hdev->status |= HID_STAT_ADDED;
2328 	else
2329 		hid_debug_unregister(hdev);
2330 
2331 	return ret;
2332 }
2333 EXPORT_SYMBOL_GPL(hid_add_device);
2334 
2335 /**
2336  * hid_allocate_device - allocate new hid device descriptor
2337  *
2338  * Allocate and initialize hid device, so that hid_destroy_device might be
2339  * used to free it.
2340  *
2341  * New hid_device pointer is returned on success, otherwise ERR_PTR encoded
2342  * error value.
2343  */
2344 struct hid_device *hid_allocate_device(void)
2345 {
2346 	struct hid_device *hdev;
2347 	int ret = -ENOMEM;
2348 
2349 	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2350 	if (hdev == NULL)
2351 		return ERR_PTR(ret);
2352 
2353 	device_initialize(&hdev->dev);
2354 	hdev->dev.release = hid_device_release;
2355 	hdev->dev.bus = &hid_bus_type;
2356 
2357 	hid_close_report(hdev);
2358 
2359 	init_waitqueue_head(&hdev->debug_wait);
2360 	INIT_LIST_HEAD(&hdev->debug_list);
2361 	spin_lock_init(&hdev->debug_list_lock);
2362 	sema_init(&hdev->driver_lock, 1);
2363 	sema_init(&hdev->driver_input_lock, 1);
2364 
2365 	return hdev;
2366 }
2367 EXPORT_SYMBOL_GPL(hid_allocate_device);
2368 
2369 static void hid_remove_device(struct hid_device *hdev)
2370 {
2371 	if (hdev->status & HID_STAT_ADDED) {
2372 		device_del(&hdev->dev);
2373 		hid_debug_unregister(hdev);
2374 		hdev->status &= ~HID_STAT_ADDED;
2375 	}
2376 	kfree(hdev->dev_rdesc);
2377 	hdev->dev_rdesc = NULL;
2378 	hdev->dev_rsize = 0;
2379 }
2380 
2381 /**
2382  * hid_destroy_device - free previously allocated device
2383  *
2384  * @hdev: hid device
2385  *
2386  * If you allocate hid_device through hid_allocate_device, you should ever
2387  * free by this function.
2388  */
2389 void hid_destroy_device(struct hid_device *hdev)
2390 {
2391 	hid_remove_device(hdev);
2392 	put_device(&hdev->dev);
2393 }
2394 EXPORT_SYMBOL_GPL(hid_destroy_device);
2395 
2396 int __hid_register_driver(struct hid_driver *hdrv, struct module *owner,
2397 		const char *mod_name)
2398 {
2399 	int ret;
2400 
2401 	hdrv->driver.name = hdrv->name;
2402 	hdrv->driver.bus = &hid_bus_type;
2403 	hdrv->driver.owner = owner;
2404 	hdrv->driver.mod_name = mod_name;
2405 
2406 	INIT_LIST_HEAD(&hdrv->dyn_list);
2407 	spin_lock_init(&hdrv->dyn_lock);
2408 
2409 	ret = driver_register(&hdrv->driver);
2410 	if (ret)
2411 		return ret;
2412 
2413 	ret = driver_create_file(&hdrv->driver, &driver_attr_new_id);
2414 	if (ret)
2415 		driver_unregister(&hdrv->driver);
2416 
2417 	return ret;
2418 }
2419 EXPORT_SYMBOL_GPL(__hid_register_driver);
2420 
2421 void hid_unregister_driver(struct hid_driver *hdrv)
2422 {
2423 	driver_remove_file(&hdrv->driver, &driver_attr_new_id);
2424 	driver_unregister(&hdrv->driver);
2425 	hid_free_dynids(hdrv);
2426 }
2427 EXPORT_SYMBOL_GPL(hid_unregister_driver);
2428 
2429 int hid_check_keys_pressed(struct hid_device *hid)
2430 {
2431 	struct hid_input *hidinput;
2432 	int i;
2433 
2434 	if (!(hid->claimed & HID_CLAIMED_INPUT))
2435 		return 0;
2436 
2437 	list_for_each_entry(hidinput, &hid->inputs, list) {
2438 		for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
2439 			if (hidinput->input->key[i])
2440 				return 1;
2441 	}
2442 
2443 	return 0;
2444 }
2445 
2446 EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
2447 
2448 static int __init hid_init(void)
2449 {
2450 	int ret;
2451 
2452 	if (hid_debug)
2453 		pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
2454 			"debugfs is now used for inspecting the device (report descriptor, reports)\n");
2455 
2456 	ret = bus_register(&hid_bus_type);
2457 	if (ret) {
2458 		pr_err("can't register hid bus\n");
2459 		goto err;
2460 	}
2461 
2462 	ret = hidraw_init();
2463 	if (ret)
2464 		goto err_bus;
2465 
2466 	hid_debug_init();
2467 
2468 	return 0;
2469 err_bus:
2470 	bus_unregister(&hid_bus_type);
2471 err:
2472 	return ret;
2473 }
2474 
2475 static void __exit hid_exit(void)
2476 {
2477 	hid_debug_exit();
2478 	hidraw_exit();
2479 	bus_unregister(&hid_bus_type);
2480 }
2481 
2482 module_init(hid_init);
2483 module_exit(hid_exit);
2484 
2485 MODULE_AUTHOR("Andreas Gal");
2486 MODULE_AUTHOR("Vojtech Pavlik");
2487 MODULE_AUTHOR("Jiri Kosina");
2488 MODULE_LICENSE(DRIVER_LICENSE);
2489 
2490