WebSVN - shark - Blame - Rev 1057 - /shark/trunk/drivers/usb/input/hid-core.c

Rev	Author	Line No.	Line
846	giacomo	1	/*
		2	* USB HID support for Linux
		3	*
		4	* Copyright (c) 1999 Andreas Gal
		5	* Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@suse.cz>
		6	*/
		7
		8	/*
		9	* This program is free software; you can redistribute it and/or modify it
		10	* under the terms of the GNU General Public License as published by the Free
		11	* Software Foundation; either version 2 of the License, or (at your option)
		12	* any later version.
		13	*/
		14
		15	#include <linuxcomp.h>
		16
		17	#include <linux/module.h>
		18	#include <linux/slab.h>
		19	#include <linux/init.h>
		20	#include <linux/kernel.h>
		21	#include <linux/sched.h>
		22	#include <linux/list.h>
		23	#include <linux/mm.h>
		24	#include <linux/smp_lock.h>
		25	#include <linux/spinlock.h>
		26	#include <asm/unaligned.h>
		27	#include <asm/byteorder.h>
		28	#include <linux/input.h>
		29
		30	#undef DEBUG
		31	#undef DEBUG_DATA
		32
		33	#include <linux/usb.h>
		34
		35	#include "hid.h"
		36	#include <linux/hiddev.h>
		37
		38	/*
		39	* Version Information
		40	*/
		41
		42	#define DRIVER_VERSION "v2.0"
		43	#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik"
		44	#define DRIVER_DESC "USB HID core driver"
		45	#define DRIVER_LICENSE "GPL"
		46
		47	static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
		48	"Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
		49
		50	/*
		51	* Register a new report for a device.
		52	*/
		53
		54	static struct hid_report hid_register_report(struct hid_device device, unsigned type, unsigned id)
		55	{
		56	struct hid_report_enum *report_enum = device->report_enum + type;
		57	struct hid_report *report;
		58
		59	if (report_enum->report_id_hash[id])
		60	return report_enum->report_id_hash[id];
		61
		62	if (!(report = kmalloc(sizeof(struct hid_report), GFP_KERNEL)))
		63	return NULL;
		64	memset(report, 0, sizeof(struct hid_report));
		65
		66	if (id != 0)
		67	report_enum->numbered = 1;
		68
		69	report->id = id;
		70	report->type = type;
		71	report->size = 0;
		72	report->device = device;
		73	report_enum->report_id_hash[id] = report;
		74
		75	list_add_tail(&report->list, &report_enum->report_list);
		76
		77	return report;
		78	}
		79
		80	/*
		81	* Register a new field for this report.
		82	*/
		83
		84	static struct hid_field hid_register_field(struct hid_report report, unsigned usages, unsigned values)
		85	{
		86	struct hid_field *field;
		87
		88	if (report->maxfield == HID_MAX_FIELDS) {
		89	dbg("too many fields in report");
		90	return NULL;
		91	}
		92
		93	if (!(field = kmalloc(sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
		94	+ values * sizeof(unsigned), GFP_KERNEL))) return NULL;
		95
		96	memset(field, 0, sizeof(struct hid_field) + usages * sizeof(struct hid_usage)
		97	+ values * sizeof(unsigned));
		98
		99	report->field[report->maxfield++] = field;
		100	field->usage = (struct hid_usage *)(field + 1);
		101	field->value = (unsigned *)(field->usage + usages);
		102	field->report = report;
		103
		104	return field;
		105	}
		106
		107	/*
		108	* Open a collection. The type/usage is pushed on the stack.
		109	*/
		110
		111	static int open_collection(struct hid_parser *parser, unsigned type)
		112	{
		113	struct hid_collection *collection;
		114	unsigned usage;
		115
		116	usage = parser->local.usage[0];
		117
		118	if (parser->collection_stack_ptr == HID_COLLECTION_STACK_SIZE) {
		119	dbg("collection stack overflow");
		120	return -1;
		121	}
		122
		123	if (parser->device->maxcollection == parser->device->collection_size) {
		124	collection = kmalloc(sizeof(struct hid_collection) *
		125	parser->device->collection_size * 2,
		126	GFP_KERNEL);
		127	if (collection == NULL) {
		128	dbg("failed to reallocate collection array");
		129	return -1;
		130	}
		131	memcpy(collection, parser->device->collection,
		132	sizeof(struct hid_collection) *
		133	parser->device->collection_size);
		134	memset(collection + parser->device->collection_size, 0,
		135	sizeof(struct hid_collection) *
		136	parser->device->collection_size);
		137	kfree(parser->device->collection);
		138	parser->device->collection = collection;
		139	parser->device->collection_size *= 2;
		140	}
		141
		142	parser->collection_stack[parser->collection_stack_ptr++] =
		143	parser->device->maxcollection;
		144
		145	collection = parser->device->collection +
		146	parser->device->maxcollection++;
		147	collection->type = type;
		148	collection->usage = usage;
		149	collection->level = parser->collection_stack_ptr - 1;
		150
		151	if (type == HID_COLLECTION_APPLICATION)
		152	parser->device->maxapplication++;
		153
		154	return 0;
		155	}
		156
		157	/*
		158	* Close a collection.
		159	*/
		160
		161	static int close_collection(struct hid_parser *parser)
		162	{
		163	if (!parser->collection_stack_ptr) {
		164	dbg("collection stack underflow");
		165	return -1;
		166	}
		167	parser->collection_stack_ptr--;
		168	return 0;
		169	}
		170
		171	/*
		172	* Climb up the stack, search for the specified collection type
		173	* and return the usage.
		174	*/
		175
		176	static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
		177	{
		178	int n;
		179	for (n = parser->collection_stack_ptr - 1; n >= 0; n--)
		180	if (parser->device->collection[parser->collection_stack[n]].type == type)
		181	return parser->device->collection[parser->collection_stack[n]].usage;
		182	return 0; /* we know nothing about this usage type */
		183	}
		184
		185	/*
		186	* Add a usage to the temporary parser table.
		187	*/
		188
		189	static int hid_add_usage(struct hid_parser *parser, unsigned usage)
		190	{
		191	if (parser->local.usage_index >= HID_MAX_USAGES) {
		192	dbg("usage index exceeded");
		193	return -1;
		194	}
		195	parser->local.usage[parser->local.usage_index] = usage;
		196	parser->local.collection_index[parser->local.usage_index] =
		197	parser->collection_stack_ptr ?
		198	parser->collection_stack[parser->collection_stack_ptr - 1] : 0;
		199	parser->local.usage_index++;
		200	return 0;
		201	}
		202
		203	/*
		204	* Register a new field for this report.
		205	*/
		206
		207	static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)
		208	{
		209	struct hid_report *report;
		210	struct hid_field *field;
		211	int usages;
		212	unsigned offset;
		213	int i;
		214
		215	if (!(report = hid_register_report(parser->device, report_type, parser->global.report_id))) {
		216	dbg("hid_register_report failed");
		217	return -1;
		218	}
		219
		220	if (parser->global.logical_maximum < parser->global.logical_minimum) {
		221	dbg("logical range invalid %d %d", parser->global.logical_minimum, parser->global.logical_maximum);
		222	return -1;
		223	}
		224	usages = parser->local.usage_index;
		225
		226	offset = report->size;
		227	report->size += parser->global.report_size * parser->global.report_count;
		228
		229	if (usages == 0)
		230	return 0; /* ignore padding fields */
		231
		232	if ((field = hid_register_field(report, usages, parser->global.report_count)) == NULL)
		233	return 0;
		234
		235	field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
		236	field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
		237	field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
		238
		239	for (i = 0; i < usages; i++) {
		240	field->usage[i].hid = parser->local.usage[i];
		241	field->usage[i].collection_index =
		242	parser->local.collection_index[i];
		243	}
		244
		245	field->maxusage = usages;
		246	field->flags = flags;
		247	field->report_offset = offset;
		248	field->report_type = report_type;
		249	field->report_size = parser->global.report_size;
		250	field->report_count = parser->global.report_count;
		251	field->logical_minimum = parser->global.logical_minimum;
		252	field->logical_maximum = parser->global.logical_maximum;
		253	field->physical_minimum = parser->global.physical_minimum;
		254	field->physical_maximum = parser->global.physical_maximum;
		255	field->unit_exponent = parser->global.unit_exponent;
		256	field->unit = parser->global.unit;
		257
		258	return 0;
		259	}
		260
		261	/*
		262	* Read data value from item.
		263	*/
		264
		265	static __inline__ __u32 item_udata(struct hid_item *item)
		266	{
		267	switch (item->size) {
		268	case 1: return item->data.u8;
		269	case 2: return item->data.u16;
		270	case 4: return item->data.u32;
		271	}
		272	return 0;
		273	}
		274
		275	static __inline__ __s32 item_sdata(struct hid_item *item)
		276	{
		277	switch (item->size) {
		278	case 1: return item->data.s8;
		279	case 2: return item->data.s16;
		280	case 4: return item->data.s32;
		281	}
		282	return 0;
		283	}
		284
		285	/*
		286	* Process a global item.
		287	*/
		288
		289	static int hid_parser_global(struct hid_parser parser, struct hid_item item)
		290	{
		291	switch (item->tag) {
		292
		293	case HID_GLOBAL_ITEM_TAG_PUSH:
		294
		295	if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {
		296	dbg("global enviroment stack overflow");
		297	return -1;
		298	}
		299
		300	memcpy(parser->global_stack + parser->global_stack_ptr++,
		301	&parser->global, sizeof(struct hid_global));
		302	return 0;
		303
		304	case HID_GLOBAL_ITEM_TAG_POP:
		305
		306	if (!parser->global_stack_ptr) {
		307	dbg("global enviroment stack underflow");
		308	return -1;
		309	}
		310
		311	memcpy(&parser->global, parser->global_stack + --parser->global_stack_ptr,
		312	sizeof(struct hid_global));
		313	return 0;
		314
		315	case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
		316	parser->global.usage_page = item_udata(item);
		317	return 0;
		318
		319	case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
		320	parser->global.logical_minimum = item_sdata(item);
		321	return 0;
		322
		323	case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
		324	if (parser->global.logical_minimum < 0)
		325	parser->global.logical_maximum = item_sdata(item);
		326	else
		327	parser->global.logical_maximum = item_udata(item);
		328	return 0;
		329
		330	case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
		331	parser->global.physical_minimum = item_sdata(item);
		332	return 0;
		333
		334	case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
		335	if (parser->global.physical_minimum < 0)
		336	parser->global.physical_maximum = item_sdata(item);
		337	else
		338	parser->global.physical_maximum = item_udata(item);
		339	return 0;
		340
		341	case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
		342	parser->global.unit_exponent = item_sdata(item);
		343	return 0;
		344
		345	case HID_GLOBAL_ITEM_TAG_UNIT:
		346	parser->global.unit = item_udata(item);
		347	return 0;
		348
		349	case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
		350	if ((parser->global.report_size = item_udata(item)) > 32) {
		351	dbg("invalid report_size %d", parser->global.report_size);
		352	return -1;
		353	}
		354	return 0;
		355
		356	case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
		357	if ((parser->global.report_count = item_udata(item)) > HID_MAX_USAGES) {
		358	dbg("invalid report_count %d", parser->global.report_count);
		359	return -1;
		360	}
		361	return 0;
		362
		363	case HID_GLOBAL_ITEM_TAG_REPORT_ID:
		364	if ((parser->global.report_id = item_udata(item)) == 0) {
		365	dbg("report_id 0 is invalid");
		366	return -1;
		367	}
		368	return 0;
		369
		370	default:
		371	dbg("unknown global tag 0x%x", item->tag);
		372	return -1;
		373	}
		374	}
		375
		376	/*
		377	* Process a local item.
		378	*/
		379
		380	static int hid_parser_local(struct hid_parser parser, struct hid_item item)
		381	{
		382	__u32 data;
		383	unsigned n;
		384
		385	if (item->size == 0) {
		386	dbg("item data expected for local item");
		387	return -1;
		388	}
		389
		390	data = item_udata(item);
		391
		392	switch (item->tag) {
		393
		394	case HID_LOCAL_ITEM_TAG_DELIMITER:
		395
		396	if (data) {
		397	/*
		398	* We treat items before the first delimiter
		399	* as global to all usage sets (branch 0).
		400	* In the moment we process only these global
		401	* items and the first delimiter set.
		402	*/
		403	if (parser->local.delimiter_depth != 0) {
		404	dbg("nested delimiters");
		405	return -1;
		406	}
		407	parser->local.delimiter_depth++;
		408	parser->local.delimiter_branch++;
		409	} else {
		410	if (parser->local.delimiter_depth < 1) {
		411	dbg("bogus close delimiter");
		412	return -1;
		413	}
		414	parser->local.delimiter_depth--;
		415	}
		416	return 1;
		417
		418	case HID_LOCAL_ITEM_TAG_USAGE:
		419
		420	if (parser->local.delimiter_branch > 1) {
		421	dbg("alternative usage ignored");
		422	return 0;
		423	}
		424
		425	if (item->size <= 2)
		426	data = (parser->global.usage_page << 16) + data;
		427
		428	return hid_add_usage(parser, data);
		429
		430	case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
		431
		432	if (parser->local.delimiter_branch > 1) {
		433	dbg("alternative usage ignored");
		434	return 0;
		435	}
		436
		437	if (item->size <= 2)
		438	data = (parser->global.usage_page << 16) + data;
		439
		440	parser->local.usage_minimum = data;
		441	return 0;
		442
		443	case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
		444
		445	if (parser->local.delimiter_branch > 1) {
		446	dbg("alternative usage ignored");
		447	return 0;
		448	}
		449
		450	if (item->size <= 2)
		451	data = (parser->global.usage_page << 16) + data;
		452
		453	for (n = parser->local.usage_minimum; n <= data; n++)
		454	if (hid_add_usage(parser, n)) {
		455	dbg("hid_add_usage failed\n");
		456	return -1;
		457	}
		458	return 0;
		459
		460	default:
		461
		462	dbg("unknown local item tag 0x%x", item->tag);
		463	return 0;
		464	}
		465	return 0;
		466	}
		467
		468	/*
		469	* Process a main item.
		470	*/
		471
		472	static int hid_parser_main(struct hid_parser parser, struct hid_item item)
		473	{
		474	__u32 data;
		475	int ret;
		476
		477	data = item_udata(item);
		478
		479	switch (item->tag) {
		480	case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
		481	ret = open_collection(parser, data & 0xff);
		482	break;
		483	case HID_MAIN_ITEM_TAG_END_COLLECTION:
		484	ret = close_collection(parser);
		485	break;
		486	case HID_MAIN_ITEM_TAG_INPUT:
		487	ret = hid_add_field(parser, HID_INPUT_REPORT, data);
		488	break;
		489	case HID_MAIN_ITEM_TAG_OUTPUT:
		490	ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);
		491	break;
		492	case HID_MAIN_ITEM_TAG_FEATURE:
		493	ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
		494	break;
		495	default:
		496	dbg("unknown main item tag 0x%x", item->tag);
		497	ret = 0;
		498	}
		499
		500	memset(&parser->local, 0, sizeof(parser->local)); /* Reset the local parser environment */
		501
		502	return ret;
		503	}
		504
		505	/*
		506	* Process a reserved item.
		507	*/
		508
		509	static int hid_parser_reserved(struct hid_parser parser, struct hid_item item)
		510	{
		511	dbg("reserved item type, tag 0x%x", item->tag);
		512	return 0;
		513	}
		514
		515	/*
		516	* Free a report and all registered fields. The field->usage and
		517	* field->value table's are allocated behind the field, so we need
		518	* only to free(field) itself.
		519	*/
		520
		521	static void hid_free_report(struct hid_report *report)
		522	{
		523	unsigned n;
		524
		525	for (n = 0; n < report->maxfield; n++)
		526	kfree(report->field[n]);
		527	kfree(report);
		528	}
		529
		530	/*
		531	* Free a device structure, all reports, and all fields.
		532	*/
		533
		534	static void hid_free_device(struct hid_device *device)
		535	{
		536	unsigned i,j;
		537
		538	hid_ff_exit(device);
		539
		540	for (i = 0; i < HID_REPORT_TYPES; i++) {
		541	struct hid_report_enum *report_enum = device->report_enum + i;
		542
		543	for (j = 0; j < 256; j++) {
		544	struct hid_report *report = report_enum->report_id_hash[j];
		545	if (report)
		546	hid_free_report(report);
		547	}
		548	}
		549
		550	if (device->rdesc)
		551	kfree(device->rdesc);
		552	kfree(device);
		553	}
		554
		555	/*
		556	* Fetch a report description item from the data stream. We support long
		557	* items, though they are not used yet.
		558	*/
		559
		560	static u8 fetch_item(__u8 start, __u8 end, struct hid_item item)
		561	{
		562	u8 b;
		563
		564	if ((end - start) <= 0)
		565	return NULL;
		566
		567	b = *start++;
		568
		569	item->type = (b >> 2) & 3;
		570	item->tag = (b >> 4) & 15;
		571
		572	if (item->tag == HID_ITEM_TAG_LONG) {
		573
		574	item->format = HID_ITEM_FORMAT_LONG;
		575
		576	if ((end - start) < 2)
		577	return NULL;
		578
		579	item->size = *start++;
		580	item->tag = *start++;
		581
		582	if ((end - start) < item->size)
		583	return NULL;
		584
		585	item->data.longdata = start;
		586	start += item->size;
		587	return start;
		588	}
		589
		590	item->format = HID_ITEM_FORMAT_SHORT;
		591	item->size = b & 3;
		592
		593	switch (item->size) {
		594
		595	case 0:
		596	return start;
		597
		598	case 1:
		599	if ((end - start) < 1)
		600	return NULL;
		601	item->data.u8 = *start++;
		602	return start;
		603
		604	case 2:
		605	if ((end - start) < 2)
		606	return NULL;
1056	tullio	607
		608	// changed for gcc4 compatibility
		609	//item->data.u16 = le16_to_cpu(get_unaligned(((__u16*)start)++));
		610	item->data.u16 = le16_to_cpu(get_unaligned(((__u16*)start)));
		611	start += sizeof(u16);
846	giacomo	612	return start;
		613
		614	case 3:
		615	item->size++;
		616	if ((end - start) < 4)
		617	return NULL;
1056	tullio	618
		619	// changed for gcc4 compatibility
		620	//item->data.u32 = le32_to_cpu(get_unaligned(((__u32*)start)++));
		621	item->data.u32 = le32_to_cpu(get_unaligned(((__u32*)start)));
		622	start += sizeof(u32);
846	giacomo	623	return start;
		624	}
		625
		626	return NULL;
		627	}
		628
		629	/*
		630	* Parse a report description into a hid_device structure. Reports are
		631	* enumerated, fields are attached to these reports.
		632	*/
		633
		634	static struct hid_device hid_parse_report(__u8 start, unsigned size)
		635	{
		636	struct hid_device *device;
		637	struct hid_parser *parser;
		638	struct hid_item item;
		639	__u8 *end;
		640	unsigned i;
		641	static int (dispatch_type[])(struct hid_parser parser,
		642	struct hid_item *item) = {
		643	hid_parser_main,
		644	hid_parser_global,
		645	hid_parser_local,
		646	hid_parser_reserved
		647	};
		648
		649	if (!(device = kmalloc(sizeof(struct hid_device), GFP_KERNEL)))
		650	return NULL;
		651	memset(device, 0, sizeof(struct hid_device));
		652
		653	if (!(device->collection =kmalloc(sizeof(struct hid_collection) *
		654	HID_DEFAULT_NUM_COLLECTIONS, GFP_KERNEL))) {
		655	kfree(device);
		656	return NULL;
		657	}
		658	memset(device->collection, 0, sizeof(struct hid_collection) *
		659	HID_DEFAULT_NUM_COLLECTIONS);
		660	device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
		661
		662	for (i = 0; i < HID_REPORT_TYPES; i++)
		663	INIT_LIST_HEAD(&device->report_enum[i].report_list);
		664
		665	if (!(device->rdesc = (__u8 *)kmalloc(size, GFP_KERNEL))) {
		666	kfree(device->collection);
		667	kfree(device);
		668	return NULL;
		669	}
		670	memcpy(device->rdesc, start, size);
		671	device->rsize = size;
		672
		673	if (!(parser = kmalloc(sizeof(struct hid_parser), GFP_KERNEL))) {
		674	kfree(device->rdesc);
		675	kfree(device->collection);
		676	kfree(device);
		677	return NULL;
		678	}
		679	memset(parser, 0, sizeof(struct hid_parser));
		680	parser->device = device;
		681
		682	end = start + size;
		683	while ((start = fetch_item(start, end, &item)) != 0) {
		684
		685	if (item.format != HID_ITEM_FORMAT_SHORT) {
		686	dbg("unexpected long global item");
		687	kfree(device->collection);
		688	hid_free_device(device);
		689	kfree(parser);
		690	return NULL;
		691	}
		692
		693	if (dispatch_type[item.type](parser, &item)) {
		694	dbg("item %u %u %u %u parsing failed\n",
		695	item.format, (unsigned)item.size, (unsigned)item.type, (unsigned)item.tag);
		696	kfree(device->collection);
		697	hid_free_device(device);
		698	kfree(parser);
		699	return NULL;
		700	}
		701
		702	if (start == end) {
		703	if (parser->collection_stack_ptr) {
		704	dbg("unbalanced collection at end of report description");
		705	kfree(device->collection);
		706	hid_free_device(device);
		707	kfree(parser);
		708	return NULL;
		709	}
		710	if (parser->local.delimiter_depth) {
		711	dbg("unbalanced delimiter at end of report description");
		712	kfree(device->collection);
		713	hid_free_device(device);
		714	kfree(parser);
		715	return NULL;
		716	}
		717	kfree(parser);
		718	return device;
		719	}
		720	}
		721
		722	dbg("item fetching failed at offset %d\n", (int)(end - start));
		723	kfree(device->collection);
		724	hid_free_device(device);
		725	kfree(parser);
		726	return NULL;
		727	}
		728
		729	/*
		730	* Convert a signed n-bit integer to signed 32-bit integer. Common
		731	* cases are done through the compiler, the screwed things has to be
		732	* done by hand.
		733	*/
		734
		735	static __inline__ __s32 snto32(__u32 value, unsigned n)
		736	{
		737	switch (n) {
		738	case 8: return ((__s8)value);
		739	case 16: return ((__s16)value);
		740	case 32: return ((__s32)value);
		741	}
		742	return value & (1 << (n - 1)) ? value \| (-1 << n) : value;
		743	}
		744
		745	/*
		746	* Convert a signed 32-bit integer to a signed n-bit integer.
		747	*/
		748
		749	static __inline__ __u32 s32ton(__s32 value, unsigned n)
		750	{
		751	__s32 a = value >> (n - 1);
		752	if (a && a != -1)
		753	return value < 0 ? 1 << (n - 1) : (1 << (n - 1)) - 1;
		754	return value & ((1 << n) - 1);
		755	}
		756
		757	/*
		758	* Extract/implement a data field from/to a report.
		759	*/
		760
		761	static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n)
		762	{
		763	report += (offset >> 5) << 2; offset &= 31;
		764	return (le64_to_cpu(get_unaligned((__u64*)report)) >> offset) & ((1 << n) - 1);
		765	}
		766
		767	static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value)
		768	{
		769	report += (offset >> 5) << 2; offset &= 31;
		770	put_unaligned((get_unaligned((__u64*)report)
		771	& cpu_to_le64(~((((__u64) 1 << n) - 1) << offset)))
		772	\| cpu_to_le64((__u64)value << offset), (__u64*)report);
		773	}
		774
		775	/*
		776	* Search an array for a value.
		777	*/
		778
		779	static __inline__ int search(__s32 *array, __s32 value, unsigned n)
		780	{
		781	while (n--) {
		782	if (*array++ == value)
		783	return 0;
		784	}
		785	return -1;
		786	}
		787
		788	static void hid_process_event(struct hid_device hid, struct hid_field field, struct hid_usage usage, __s32 value, struct pt_regs regs)
		789	{
		790	hid_dump_input(usage, value);
		791	if (hid->claimed & HID_CLAIMED_INPUT)
		792	hidinput_hid_event(hid, field, usage, value, regs);
		793	if (hid->claimed & HID_CLAIMED_HIDDEV)
		794	hiddev_hid_event(hid, field, usage, value, regs);
		795	}
		796
		797	/*
		798	* Analyse a received field, and fetch the data from it. The field
		799	* content is stored for next report processing (we do differential
		800	* reporting to the layer).
		801	*/
		802
		803	static void hid_input_field(struct hid_device hid, struct hid_field field, __u8 data, struct pt_regs regs)
		804	{
		805	unsigned n;
		806	unsigned count = field->report_count;
		807	unsigned offset = field->report_offset;
		808	unsigned size = field->report_size;
		809	__s32 min = field->logical_minimum;
		810	__s32 max = field->logical_maximum;
		811	__s32 value[count]; /* WARNING: gcc specific */
		812
		813	for (n = 0; n < count; n++) {
		814
		815	value[n] = min < 0 ? snto32(extract(data, offset + n * size, size), size) :
		816	extract(data, offset + n * size, size);
		817
		818	if (!(field->flags & HID_MAIN_ITEM_VARIABLE) /* Ignore report if ErrorRollOver */
		819	&& value[n] >= min && value[n] <= max
		820	&& field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1)
		821	return;
		822	}
		823
		824	for (n = 0; n < count; n++) {
		825
		826	if (HID_MAIN_ITEM_VARIABLE & field->flags) {
		827
		828	if (field->flags & HID_MAIN_ITEM_RELATIVE) {
		829	if (!value[n])
		830	continue;
		831	} else {
		832	if (value[n] == field->value[n])
		833	continue;
		834	}
		835	hid_process_event(hid, field, &field->usage[n], value[n], regs);
		836	continue;
		837	}
		838
		839	if (field->value[n] >= min && field->value[n] <= max
		840	&& field->usage[field->value[n] - min].hid
		841	&& search(value, field->value[n], count))
		842	hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, regs);
		843
		844	if (value[n] >= min && value[n] <= max
		845	&& field->usage[value[n] - min].hid
		846	&& search(field->value, value[n], count))
		847	hid_process_event(hid, field, &field->usage[value[n] - min], 1, regs);
		848	}
		849
		850	memcpy(field->value, value, count * sizeof(__s32));
		851	}
		852
		853	static int hid_input_report(int type, struct urb urb, struct pt_regs regs)
		854	{
		855	struct hid_device *hid = urb->context;
		856	struct hid_report_enum *report_enum = hid->report_enum + type;
		857	u8 *data = urb->transfer_buffer;
		858	int len = urb->actual_length;
		859	struct hid_report *report;
		860	int n, size;
		861
		862	if (!len) {
		863	dbg("empty report");
		864	return -1;
		865	}
		866
		867	#ifdef DEBUG_DATA
		868	printk(KERN_DEBUG __FILE__ ": report (size %u) (%snumbered)\n", len, report_enum->numbered ? "" : "un");
		869	#endif
		870
		871	n = 0; /* Normally report number is 0 */
		872	if (report_enum->numbered) { /* Device uses numbered reports, data[0] is report number */
		873	n = *data++;
		874	len--;
		875	}
		876
		877	#ifdef DEBUG_DATA
		878	{
		879	int i;
		880	printk(KERN_DEBUG __FILE__ ": report %d (size %u) = ", n, len);
		881	for (i = 0; i < len; i++)
		882	printk(" %02x", data[i]);
		883	printk("\n");
		884	}
		885	#endif
		886
		887	if (!(report = report_enum->report_id_hash[n])) {
		888	dbg("undefined report_id %d received", n);
		889	return -1;
		890	}
		891
		892	size = ((report->size - 1) >> 3) + 1;
		893
		894	if (len < size) {
		895	dbg("report %d is too short, (%d < %d)", report->id, len, size);
		896	return -1;
		897	}
		898
		899	if (hid->claimed & HID_CLAIMED_HIDDEV)
		900	hiddev_report_event(hid, report);
		901
		902	for (n = 0; n < report->maxfield; n++)
		903	hid_input_field(hid, report->field[n], data, regs);
		904
		905	if (hid->claimed & HID_CLAIMED_INPUT)
		906	hidinput_report_event(hid, report);
		907
		908	return 0;
		909	}
		910
		911	/*
		912	* Input interrupt completion handler.
		913	*/
		914
		915	static void hid_irq_in(struct urb urb, struct pt_regs regs)
		916	{
		917	struct hid_device *hid = urb->context;
		918	int status;
		919
		920	switch (urb->status) {
		921	case 0: /* success */
		922	hid_input_report(HID_INPUT_REPORT, urb, regs);
		923	break;
		924	case -ECONNRESET: /* unlink */
		925	case -ENOENT:
		926	case -ESHUTDOWN:
		927	return;
		928	default: /* error */
		929	dbg("nonzero status in input irq %d", urb->status);
		930	}
		931
		932	status = usb_submit_urb (urb, SLAB_ATOMIC);
		933	if (status)
		934	err ("can't resubmit intr, %s-%s/input%d, status %d",
		935	hid->dev->bus->bus_name, hid->dev->devpath,
		936	hid->ifnum, status);
		937	}
		938
		939	/*
		940	* Output the field into the report.
		941	*/
		942
		943	static void hid_output_field(struct hid_field field, __u8 data)
		944	{
		945	unsigned count = field->report_count;
		946	unsigned offset = field->report_offset;
		947	unsigned size = field->report_size;
		948	unsigned n;
		949
		950	for (n = 0; n < count; n++) {
		951	if (field->logical_minimum < 0) /* signed values */
		952	implement(data, offset + n * size, size, s32ton(field->value[n], size));
		953	else /* unsigned values */
		954	implement(data, offset + n * size, size, field->value[n]);
		955	}
		956	}
		957
		958	/*
		959	* Create a report.
		960	*/
		961
		962	void hid_output_report(struct hid_report report, __u8 data)
		963	{
		964	unsigned n;
		965
		966	if (report->id > 0)
		967	*data++ = report->id;
		968
		969	for (n = 0; n < report->maxfield; n++)
		970	hid_output_field(report->field[n], data);
		971	}
		972
		973	/*
		974	* Set a field value. The report this field belongs to has to be
		975	* created and transferred to the device, to set this value in the
		976	* device.
		977	*/
		978
		979	int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
		980	{
		981	unsigned size = field->report_size;
		982
		983	hid_dump_input(field->usage + offset, value);
		984
		985	if (offset >= field->report_count) {
		986	dbg("offset (%d) exceeds report_count (%d)", offset, field->report_count);
		987	hid_dump_field(field, 8);
		988	return -1;
		989	}
		990	if (field->logical_minimum < 0) {
		991	if (value != snto32(s32ton(value, size), size)) {
		992	dbg("value %d is out of range", value);
		993	return -1;
		994	}
		995	}
		996	field->value[offset] = value;
		997	return 0;
		998	}
		999
		1000	int hid_find_field(struct hid_device hid, unsigned int type, unsigned int code, struct hid_field *field)
		1001	{
		1002	struct hid_report_enum *report_enum = hid->report_enum + HID_OUTPUT_REPORT;
		1003	struct list_head *list = report_enum->report_list.next;
		1004	int i, j;
		1005
		1006	while (list != &report_enum->report_list) {
		1007	struct hid_report report = (struct hid_report ) list;
		1008	list = list->next;
		1009	for (i = 0; i < report->maxfield; i++) {
		1010	*field = report->field[i];
		1011	for (j = 0; j < (*field)->maxusage; j++)
		1012	if ((field)->usage[j].type == type && (field)->usage[j].code == code)
		1013	return j;
		1014	}
		1015	}
		1016	return -1;
		1017	}
		1018
		1019	/*
		1020	* Find a report with a specified HID usage.
		1021	*/
		1022
		1023	int hid_find_report_by_usage(struct hid_device hid, __u32 wanted_usage, struct hid_report *report, int type)
		1024	{
		1025	struct hid_report_enum *report_enum = hid->report_enum + type;
		1026	struct list_head *list = report_enum->report_list.next;
		1027	int i, j;
		1028
		1029	while (list != &report_enum->report_list) {
		1030	report = (struct hid_report ) list;
		1031	list = list->next;
		1032	for (i = 0; i < (*report)->maxfield; i++) {
		1033	struct hid_field field = (report)->field[i];
		1034	for (j = 0; j < field->maxusage; j++)
		1035	if (field->logical == wanted_usage)
		1036	return j;
		1037	}
		1038	}
		1039	return -1;
		1040	}
		1041
		1042	int hid_find_field_in_report(struct hid_report report, __u32 wanted_usage, struct hid_field *field)
		1043	{
		1044	int i, j;
		1045
		1046	for (i = 0; i < report->maxfield; i++) {
		1047	*field = report->field[i];
		1048	for (j = 0; j < (*field)->maxusage; j++)
		1049	if ((*field)->usage[j].hid == wanted_usage)
		1050	return j;
		1051	}
		1052
		1053	return -1;
		1054	}
		1055
		1056	static int hid_submit_out(struct hid_device *hid)
		1057	{
		1058	struct hid_report *report;
		1059
		1060	report = hid->out[hid->outtail];
		1061
		1062	hid_output_report(report, hid->outbuf);
		1063	hid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
		1064	hid->urbout->dev = hid->dev;
		1065
		1066	dbg("submitting out urb");
		1067
		1068	if (usb_submit_urb(hid->urbout, GFP_ATOMIC)) {
		1069	err("usb_submit_urb(out) failed");
		1070	return -1;
		1071	}
		1072
		1073	return 0;
		1074	}
		1075
		1076	static int hid_submit_ctrl(struct hid_device *hid)
		1077	{
		1078	struct hid_report *report;
		1079	unsigned char dir;
		1080
		1081	report = hid->ctrl[hid->ctrltail].report;
		1082	dir = hid->ctrl[hid->ctrltail].dir;
		1083
		1084	if (dir == USB_DIR_OUT)
		1085	hid_output_report(report, hid->ctrlbuf);
		1086
		1087	hid->urbctrl->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
		1088	hid->urbctrl->pipe = (dir == USB_DIR_OUT) ? usb_sndctrlpipe(hid->dev, 0) : usb_rcvctrlpipe(hid->dev, 0);
		1089	hid->urbctrl->dev = hid->dev;
		1090
		1091	hid->cr->bRequestType = USB_TYPE_CLASS \| USB_RECIP_INTERFACE \| dir;
		1092	hid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
		1093	hid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) \| report->id);
		1094	hid->cr->wIndex = cpu_to_le16(hid->ifnum);
		1095	hid->cr->wLength = cpu_to_le16(hid->urbctrl->transfer_buffer_length);
		1096
		1097	dbg("submitting ctrl urb");
		1098
		1099	if (usb_submit_urb(hid->urbctrl, GFP_ATOMIC)) {
		1100	err("usb_submit_urb(ctrl) failed");
		1101	return -1;
		1102	}
		1103
		1104	return 0;
		1105	}
		1106
		1107	/*
		1108	* Output interrupt completion handler.
		1109	*/
		1110
		1111	static void hid_irq_out(struct urb urb, struct pt_regs regs)
		1112	{
		1113	struct hid_device *hid = urb->context;
		1114	unsigned long flags;
		1115
		1116	if (urb->status)
		1117	warn("output irq status %d received", urb->status);
		1118
		1119	spin_lock_irqsave(&hid->outlock, flags);
		1120
		1121	hid->outtail = (hid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
		1122
		1123	if (hid->outhead != hid->outtail) {
		1124	hid_submit_out(hid);
		1125	spin_unlock_irqrestore(&hid->outlock, flags);
		1126	return;
		1127	}
		1128
		1129	clear_bit(HID_OUT_RUNNING, &hid->iofl);
		1130
		1131	spin_unlock_irqrestore(&hid->outlock, flags);
		1132
		1133	wake_up(&hid->wait);
		1134	}
		1135
		1136	/*
		1137	* Control pipe completion handler.
		1138	*/
		1139
		1140	static void hid_ctrl(struct urb urb, struct pt_regs regs)
		1141	{
		1142	struct hid_device *hid = urb->context;
		1143	unsigned long flags;
		1144
		1145	if (urb->status)
		1146	warn("ctrl urb status %d received", urb->status);
		1147
		1148	spin_lock_irqsave(&hid->ctrllock, flags);
		1149
		1150	if (hid->ctrl[hid->ctrltail].dir == USB_DIR_IN)
		1151	hid_input_report(hid->ctrl[hid->ctrltail].report->type, urb, regs);
		1152
		1153	hid->ctrltail = (hid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
		1154
		1155	if (hid->ctrlhead != hid->ctrltail) {
		1156	hid_submit_ctrl(hid);
		1157	spin_unlock_irqrestore(&hid->ctrllock, flags);
		1158	return;
		1159	}
		1160
		1161	clear_bit(HID_CTRL_RUNNING, &hid->iofl);
		1162
		1163	spin_unlock_irqrestore(&hid->ctrllock, flags);
		1164
		1165	wake_up(&hid->wait);
		1166	}
		1167
		1168	void hid_submit_report(struct hid_device hid, struct hid_report report, unsigned char dir)
		1169	{
		1170	int head;
		1171	unsigned long flags;
		1172
		1173	if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
		1174	return;
		1175
		1176	if (hid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
		1177
		1178	spin_lock_irqsave(&hid->outlock, flags);
		1179
		1180	if ((head = (hid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == hid->outtail) {
		1181	spin_unlock_irqrestore(&hid->outlock, flags);
		1182	warn("output queue full");
		1183	return;
		1184	}
		1185
		1186	hid->out[hid->outhead] = report;
		1187	hid->outhead = head;
		1188
		1189	if (!test_and_set_bit(HID_OUT_RUNNING, &hid->iofl))
		1190	hid_submit_out(hid);
		1191
		1192	spin_unlock_irqrestore(&hid->outlock, flags);
		1193	return;
		1194	}
		1195
		1196	spin_lock_irqsave(&hid->ctrllock, flags);
		1197
		1198	if ((head = (hid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == hid->ctrltail) {
		1199	spin_unlock_irqrestore(&hid->ctrllock, flags);
		1200	warn("control queue full");
		1201	return;
		1202	}
		1203
		1204	hid->ctrl[hid->ctrlhead].report = report;
		1205	hid->ctrl[hid->ctrlhead].dir = dir;
		1206	hid->ctrlhead = head;
		1207
		1208	if (!test_and_set_bit(HID_CTRL_RUNNING, &hid->iofl))
		1209	hid_submit_ctrl(hid);
		1210
		1211	spin_unlock_irqrestore(&hid->ctrllock, flags);
		1212	}
		1213
		1214	int hid_wait_io(struct hid_device *hid)
		1215	{
		1216	DECLARE_WAITQUEUE(wait, current);
		1217	int timeout = 1*HZ;
		1218
		1219	set_current_state(TASK_UNINTERRUPTIBLE);
		1220	add_wait_queue(&hid->wait, &wait);
		1221
		1222	while (timeout && (test_bit(HID_CTRL_RUNNING, &hid->iofl) \|\|
		1223	test_bit(HID_OUT_RUNNING, &hid->iofl)))
		1224	timeout = schedule_timeout(timeout);
		1225
		1226	set_current_state(TASK_RUNNING);
		1227	remove_wait_queue(&hid->wait, &wait);
		1228
		1229	/* if (!timeout) {
		1230	dbg("timeout waiting for ctrl or out queue to clear");
		1231	return -1;
		1232	} */
		1233	return 0;
		1234	}
		1235
		1236	static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
		1237	unsigned char type, void *buf, int size)
		1238	{
		1239	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
		1240	USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE \| USB_DIR_IN,
		1241	(type << 8), ifnum, buf, size, HZ * USB_CTRL_GET_TIMEOUT);
		1242	}
		1243
		1244	int hid_open(struct hid_device *hid)
		1245	{
		1246	if (hid->open++)
		1247	return 0;
		1248
		1249	hid->urbin->dev = hid->dev;
		1250
		1251	if (usb_submit_urb(hid->urbin, GFP_KERNEL))
		1252	return -EIO;
		1253
		1254	return 0;
		1255	}
		1256
		1257	void hid_close(struct hid_device *hid)
		1258	{
		1259	if (!--hid->open)
		1260	usb_unlink_urb(hid->urbin);
		1261	}
		1262
		1263	/*
		1264	* Initialize all reports
		1265	*/
		1266
		1267	void hid_init_reports(struct hid_device *hid)
		1268	{
		1269	struct hid_report_enum *report_enum;
		1270	struct hid_report *report;
		1271	struct list_head *list;
		1272	int len;
		1273	int err, ret;
		1274
		1275	report_enum = hid->report_enum + HID_INPUT_REPORT;
		1276	list = report_enum->report_list.next;
		1277	while (list != &report_enum->report_list) {
		1278	report = (struct hid_report *) list;
		1279	hid_submit_report(hid, report, USB_DIR_IN);
		1280	list = list->next;
		1281	}
		1282
		1283	report_enum = hid->report_enum + HID_FEATURE_REPORT;
		1284	list = report_enum->report_list.next;
		1285	while (list != &report_enum->report_list) {
		1286	report = (struct hid_report *) list;
		1287	hid_submit_report(hid, report, USB_DIR_IN);
		1288	list = list->next;
		1289	}
		1290
		1291	err = 0;
		1292	while ((ret = hid_wait_io(hid))) {
		1293	err \|= ret;
		1294	if (test_bit(HID_CTRL_RUNNING, &hid->iofl))
		1295	usb_unlink_urb(hid->urbctrl);
		1296	if (test_bit(HID_OUT_RUNNING, &hid->iofl))
		1297	usb_unlink_urb(hid->urbout);
		1298	}
		1299
		1300	if (err)
		1301	warn("timeout initializing reports\n");
		1302
		1303	report_enum = hid->report_enum + HID_INPUT_REPORT;
		1304	list = report_enum->report_list.next;
		1305	while (list != &report_enum->report_list) {
		1306	report = (struct hid_report *) list;
		1307	len = ((report->size - 1) >> 3) + 1 + report_enum->numbered;
		1308	if (len > hid->urbin->transfer_buffer_length)
		1309	hid->urbin->transfer_buffer_length = len < HID_BUFFER_SIZE ? len : HID_BUFFER_SIZE;
		1310	usb_control_msg(hid->dev, usb_sndctrlpipe(hid->dev, 0),
		1311	0x0a, USB_TYPE_CLASS \| USB_RECIP_INTERFACE, report->id,
		1312	hid->ifnum, NULL, 0, HZ * USB_CTRL_SET_TIMEOUT);
		1313	list = list->next;
		1314	}
		1315	}
		1316
		1317	#define USB_VENDOR_ID_WACOM 0x056a
		1318	#define USB_DEVICE_ID_WACOM_PENPARTNER 0x0000
		1319	#define USB_DEVICE_ID_WACOM_GRAPHIRE 0x0010
		1320	#define USB_DEVICE_ID_WACOM_INTUOS 0x0020
		1321	#define USB_DEVICE_ID_WACOM_PL 0x0030
		1322	#define USB_DEVICE_ID_WACOM_INTUOS2 0x0040
		1323
		1324	#define USB_VENDOR_ID_KBGEAR 0x084e
		1325	#define USB_DEVICE_ID_KBGEAR_JAMSTUDIO 0x1001
		1326
		1327
		1328	#define USB_VENDOR_ID_AIPTEK 0x08ca
		1329	#define USB_DEVICE_ID_AIPTEK_6000 0x0020
		1330
		1331	#define USB_VENDOR_ID_GRIFFIN 0x077d
		1332	#define USB_DEVICE_ID_POWERMATE 0x0410
		1333	#define USB_DEVICE_ID_SOUNDKNOB 0x04AA
		1334
		1335	#define USB_VENDOR_ID_ATEN 0x0557
		1336	#define USB_DEVICE_ID_ATEN_UC100KM 0x2004
		1337	#define USB_DEVICE_ID_ATEN_CS124U 0x2202
		1338	#define USB_DEVICE_ID_ATEN_2PORTKVM 0x2204
		1339	#define USB_DEVICE_ID_ATEN_4PORTKVM 0x2205
		1340	#define USB_DEVICE_ID_ATEN_4PORTKVMC 0x2208
		1341
		1342	#define USB_VENDOR_ID_TOPMAX 0x0663
		1343	#define USB_DEVICE_ID_TOPMAX_COBRAPAD 0x0103
		1344
		1345	#define USB_VENDOR_ID_HAPP 0x078b
		1346	#define USB_DEVICE_ID_UGCI_DRIVING 0x0010
		1347	#define USB_DEVICE_ID_UGCI_FLYING 0x0020
		1348	#define USB_DEVICE_ID_UGCI_FIGHTING 0x0030
		1349
		1350	#define USB_VENDOR_ID_MGE 0x0463
		1351	#define USB_DEVICE_ID_MGE_UPS 0xffff
		1352	#define USB_DEVICE_ID_MGE_UPS1 0x0001
		1353
		1354	#define USB_VENDOR_ID_ONTRAK 0x0a07
		1355	#define USB_DEVICE_ID_ONTRAK_ADU100 0x0064
		1356
		1357	#define USB_VENDOR_ID_TANGTOP 0x0d3d
		1358	#define USB_DEVICE_ID_TANGTOP_USBPS2 0x0001
		1359
		1360	#define USB_VENDOR_ID_ESSENTIAL_REALITY 0x0d7f
		1361	#define USB_DEVICE_ID_ESSENTIAL_REALITY_P5 0x0100
		1362
		1363	#define USB_VENDOR_ID_A4TECH 0x09DA
		1364	#define USB_DEVICE_ID_A4TECH_WCP32PU 0x0006
		1365
		1366	struct hid_blacklist {
		1367	__u16 idVendor;
		1368	__u16 idProduct;
		1369	unsigned quirks;
		1370	} hid_blacklist[] = {
		1371	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PENPARTNER, HID_QUIRK_IGNORE },
		1372	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE, HID_QUIRK_IGNORE },
		1373	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 1, HID_QUIRK_IGNORE },
		1374	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE + 2, HID_QUIRK_IGNORE },
		1375	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS, HID_QUIRK_IGNORE },
		1376	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 1, HID_QUIRK_IGNORE },
		1377	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 2, HID_QUIRK_IGNORE },
		1378	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 3, HID_QUIRK_IGNORE },
		1379	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS + 4, HID_QUIRK_IGNORE },
		1380	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL, HID_QUIRK_IGNORE },
		1381	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 1, HID_QUIRK_IGNORE },
		1382	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 2, HID_QUIRK_IGNORE },
		1383	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 3, HID_QUIRK_IGNORE },
		1384	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 4, HID_QUIRK_IGNORE },
		1385	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_PL + 5, HID_QUIRK_IGNORE },
		1386	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2, HID_QUIRK_IGNORE },
		1387	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 1, HID_QUIRK_IGNORE },
		1388	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 2, HID_QUIRK_IGNORE },
		1389	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 3, HID_QUIRK_IGNORE },
		1390	{ USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS2 + 4, HID_QUIRK_IGNORE },
		1391	{ USB_VENDOR_ID_KBGEAR, USB_DEVICE_ID_KBGEAR_JAMSTUDIO, HID_QUIRK_IGNORE },
		1392	{ USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_6000, HID_QUIRK_IGNORE },
		1393	{ USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_POWERMATE, HID_QUIRK_IGNORE },
		1394	{ USB_VENDOR_ID_GRIFFIN, USB_DEVICE_ID_SOUNDKNOB, HID_QUIRK_IGNORE },
		1395	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM, HID_QUIRK_NOGET },
		1396	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS124U, HID_QUIRK_NOGET },
		1397	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET },
		1398	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET },
		1399	{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
		1400	{ USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS, HID_QUIRK_HIDDEV },
		1401	{ USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1, HID_QUIRK_HIDDEV },
		1402	{ USB_VENDOR_ID_TOPMAX, USB_DEVICE_ID_TOPMAX_COBRAPAD, HID_QUIRK_BADPAD },
		1403	{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_DRIVING, HID_QUIRK_BADPAD\|HID_QUIRK_MULTI_INPUT },
		1404	{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FLYING, HID_QUIRK_BADPAD\|HID_QUIRK_MULTI_INPUT },
		1405	{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FIGHTING, HID_QUIRK_BADPAD\|HID_QUIRK_MULTI_INPUT },
		1406	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100, HID_QUIRK_IGNORE },
		1407	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100, HID_QUIRK_IGNORE },
		1408	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200, HID_QUIRK_IGNORE },
		1409	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300, HID_QUIRK_IGNORE },
		1410	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400, HID_QUIRK_IGNORE },
		1411	{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 500, HID_QUIRK_IGNORE },
		1412	{ USB_VENDOR_ID_TANGTOP, USB_DEVICE_ID_TANGTOP_USBPS2, HID_QUIRK_NOGET },
		1413	{ USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5, HID_QUIRK_IGNORE },
		1414	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK },
		1415	{ 0, 0 }
		1416	};
		1417
		1418	static int hid_alloc_buffers(struct usb_device dev, struct hid_device hid)
		1419	{
		1420	if (!(hid->inbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->inbuf_dma)))
		1421	return -1;
		1422	if (!(hid->outbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->outbuf_dma)))
		1423	return -1;
		1424	if (!(hid->cr = usb_buffer_alloc(dev, sizeof(*(hid->cr)), SLAB_ATOMIC, &hid->cr_dma)))
		1425	return -1;
		1426	if (!(hid->ctrlbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->ctrlbuf_dma)))
		1427	return -1;
		1428
		1429	return 0;
		1430	}
		1431
		1432	static void hid_free_buffers(struct usb_device dev, struct hid_device hid)
		1433	{
		1434	if (hid->inbuf)
		1435	usb_buffer_free(dev, HID_BUFFER_SIZE, hid->inbuf, hid->inbuf_dma);
		1436	if (hid->outbuf)
		1437	usb_buffer_free(dev, HID_BUFFER_SIZE, hid->outbuf, hid->outbuf_dma);
		1438	if (hid->cr)
		1439	usb_buffer_free(dev, sizeof(*(hid->cr)), hid->cr, hid->cr_dma);
		1440	if (hid->ctrlbuf)
		1441	usb_buffer_free(dev, HID_BUFFER_SIZE, hid->ctrlbuf, hid->ctrlbuf_dma);
		1442	}
		1443
		1444	static struct hid_device usb_hid_configure(struct usb_interface intf)
		1445	{
		1446	struct usb_host_interface *interface = intf->altsetting + intf->act_altsetting;
		1447	struct usb_device *dev = interface_to_usbdev (intf);
		1448	struct hid_descriptor *hdesc;
		1449	struct hid_device *hid;
		1450	unsigned quirks = 0, rsize = 0;
		1451	char buf, rdesc;
		1452	int n;
		1453
		1454	for (n = 0; hid_blacklist[n].idVendor; n++)
		1455	if ((hid_blacklist[n].idVendor == dev->descriptor.idVendor) &&
		1456	(hid_blacklist[n].idProduct == dev->descriptor.idProduct))
		1457	quirks = hid_blacklist[n].quirks;
		1458
		1459	if (quirks & HID_QUIRK_IGNORE)
		1460	return NULL;
		1461
		1462	if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && ((!interface->desc.bNumEndpoints) \|\|
		1463	usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
		1464	dbg("class descriptor not present\n");
		1465	return NULL;
		1466	}
		1467
		1468	for (n = 0; n < hdesc->bNumDescriptors; n++)
		1469	if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
		1470	rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
		1471
		1472	if (!rsize \|\| rsize > HID_MAX_DESCRIPTOR_SIZE) {
		1473	dbg("weird size of report descriptor (%u)", rsize);
		1474	return NULL;
		1475	}
		1476
		1477	if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
		1478	dbg("couldn't allocate rdesc memory");
		1479	return NULL;
		1480	}
		1481
		1482	if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
		1483	dbg("reading report descriptor failed");
		1484	kfree(rdesc);
		1485	return NULL;
		1486	}
		1487
		1488	#ifdef DEBUG_DATA
		1489	printk(KERN_DEBUG __FILE__ ": report descriptor (size %u, read %d) = ", rsize, n);
		1490	for (n = 0; n < rsize; n++)
		1491	printk(" %02x", (unsigned char) rdesc[n]);
		1492	printk("\n");
		1493	#endif
		1494
		1495	if (!(hid = hid_parse_report(rdesc, rsize))) {
		1496	dbg("parsing report descriptor failed");
		1497	kfree(rdesc);
		1498	return NULL;
		1499	}
		1500
		1501	kfree(rdesc);
		1502	hid->quirks = quirks;
		1503
		1504	if (hid_alloc_buffers(dev, hid)) {
		1505	hid_free_buffers(dev, hid);
		1506	goto fail;
		1507	}
		1508
		1509	for (n = 0; n < interface->desc.bNumEndpoints; n++) {
		1510
		1511	struct usb_endpoint_descriptor *endpoint;
		1512	int pipe;
		1513
		1514	endpoint = &interface->endpoint[n].desc;
		1515	if ((endpoint->bmAttributes & 3) != 3) /* Not an interrupt endpoint */
		1516	continue;
		1517
		1518	if (endpoint->bEndpointAddress & USB_DIR_IN) {
		1519	if (hid->urbin)
		1520	continue;
		1521	if (!(hid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
		1522	goto fail;
		1523	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
		1524	usb_fill_int_urb(hid->urbin, dev, pipe, hid->inbuf, 0,
		1525	hid_irq_in, hid, endpoint->bInterval);
		1526	hid->urbin->transfer_dma = hid->inbuf_dma;
		1527	hid->urbin->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
		1528	} else {
		1529	if (hid->urbout)
		1530	continue;
		1531	if (!(hid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
		1532	goto fail;
		1533	pipe = usb_sndbulkpipe(dev, endpoint->bEndpointAddress);
		1534	usb_fill_bulk_urb(hid->urbout, dev, pipe, hid->outbuf, 0,
		1535	hid_irq_out, hid);
		1536	hid->urbout->transfer_dma = hid->outbuf_dma;
		1537	hid->urbout->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
		1538	}
		1539	}
		1540
		1541	if (!hid->urbin) {
		1542	err("couldn't find an input interrupt endpoint");
		1543	goto fail;
		1544	}
		1545
		1546	init_waitqueue_head(&hid->wait);
		1547
		1548	hid->outlock = SPIN_LOCK_UNLOCKED;
		1549	hid->ctrllock = SPIN_LOCK_UNLOCKED;
		1550
		1551	hid->version = le16_to_cpu(hdesc->bcdHID);
		1552	hid->country = hdesc->bCountryCode;
		1553	hid->dev = dev;
		1554	hid->ifnum = interface->desc.bInterfaceNumber;
		1555
		1556	hid->name[0] = 0;
		1557
		1558	if (!(buf = kmalloc(64, GFP_KERNEL)))
		1559	goto fail;
		1560
		1561	if (usb_string(dev, dev->descriptor.iManufacturer, buf, 64) > 0) {
		1562	strcat(hid->name, buf);
		1563	if (usb_string(dev, dev->descriptor.iProduct, buf, 64) > 0)
		1564	snprintf26(hid->name, 64, "%s %s", hid->name, buf);
		1565	} else if (usb_string(dev, dev->descriptor.iProduct, buf, 128) > 0) {
		1566	snprintf26(hid->name, 128, "%s", buf);
		1567	} else
		1568	snprintf26(hid->name, 128, "%04x:%04x", dev->descriptor.idVendor, dev->descriptor.idProduct);
		1569
		1570	usb_make_path(dev, buf, 64);
		1571	snprintf26(hid->phys, 64, "%s/input%d", buf,
		1572	intf->altsetting[0].desc.bInterfaceNumber);
		1573
		1574	if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
		1575	hid->uniq[0] = 0;
		1576
		1577	kfree(buf);
		1578
		1579	hid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
		1580	if (!hid->urbctrl)
		1581	goto fail;
		1582	usb_fill_control_urb(hid->urbctrl, dev, 0, (void *) hid->cr,
		1583	hid->ctrlbuf, 1, hid_ctrl, hid);
		1584	hid->urbctrl->setup_dma = hid->cr_dma;
		1585	hid->urbctrl->transfer_dma = hid->ctrlbuf_dma;
		1586	hid->urbctrl->transfer_flags \|= (URB_NO_TRANSFER_DMA_MAP
		1587	\| URB_NO_SETUP_DMA_MAP);
		1588
		1589	return hid;
		1590
		1591	fail:
		1592
		1593	if (hid->urbin)
		1594	usb_free_urb(hid->urbin);
		1595	if (hid->urbout)
		1596	usb_free_urb(hid->urbout);
		1597	if (hid->urbctrl)
		1598	usb_free_urb(hid->urbctrl);
		1599	hid_free_buffers(dev, hid);
		1600	hid_free_device(hid);
		1601
		1602	return NULL;
		1603	}
		1604
		1605	static void hid_disconnect(struct usb_interface *intf)
		1606	{
		1607	struct hid_device *hid = usb_get_intfdata (intf);
		1608
		1609	if (!hid)
		1610	return;
		1611
		1612	usb_set_intfdata(intf, NULL);
		1613	usb_unlink_urb(hid->urbin);
		1614	usb_unlink_urb(hid->urbout);
		1615	usb_unlink_urb(hid->urbctrl);
		1616
		1617	if (hid->claimed & HID_CLAIMED_INPUT)
		1618	hidinput_disconnect(hid);
		1619	if (hid->claimed & HID_CLAIMED_HIDDEV)
		1620	hiddev_disconnect(hid);
		1621
		1622	usb_free_urb(hid->urbin);
		1623	usb_free_urb(hid->urbctrl);
		1624	if (hid->urbout)
		1625	usb_free_urb(hid->urbout);
		1626
		1627	hid_free_buffers(hid->dev, hid);
		1628	hid_free_device(hid);
		1629	}
		1630
		1631	static int hid_probe (struct usb_interface intf, const struct usb_device_id id)
		1632	{
		1633	struct hid_device *hid;
		1634	char path[64];
		1635	int i;
		1636	char *c;
		1637
		1638	dbg("HID probe called for ifnum %d",
		1639	intf->altsetting->desc.bInterfaceNumber);
		1640
		1641	if (!(hid = usb_hid_configure(intf)))
		1642	return -EIO;
		1643
		1644	hid_init_reports(hid);
		1645	hid_dump_device(hid);
		1646
		1647	if (!hidinput_connect(hid))
		1648	hid->claimed \|= HID_CLAIMED_INPUT;
		1649	if (!hiddev_connect(hid))
		1650	hid->claimed \|= HID_CLAIMED_HIDDEV;
		1651
		1652	usb_set_intfdata(intf, hid);
		1653
		1654	if (!hid->claimed) {
		1655	printk ("HID device not claimed by input or hiddev\n");
		1656	hid_disconnect(intf);
		1657	return -EIO;
		1658	}
		1659
		1660	printk(KERN_INFO);
		1661
		1662	if (hid->claimed & HID_CLAIMED_INPUT)
		1663	printk("input");
		1664	if (hid->claimed == (HID_CLAIMED_INPUT \| HID_CLAIMED_HIDDEV))
		1665	printk(",");
		1666	if (hid->claimed & HID_CLAIMED_HIDDEV)
		1667	printk("hiddev%d", hid->minor);
		1668
		1669	c = "Device";
		1670	for (i = 0; i < hid->maxcollection; i++) {
		1671	if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
		1672	(hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
		1673	(hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
		1674	c = hid_types[hid->collection[i].usage & 0xffff];
		1675	break;
		1676	}
		1677	}
		1678
		1679	usb_make_path(interface_to_usbdev(intf), path, 63);
		1680
		1681	printk(": USB HID v%x.%02x %s [%s] on %s\n",
		1682	hid->version >> 8, hid->version & 0xff, c, hid->name, path);
		1683
		1684	return 0;
		1685	}
		1686
		1687	static struct usb_device_id hid_usb_ids [] = {
		1688	{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
		1689	.bInterfaceClass = USB_INTERFACE_CLASS_HID },
		1690	{ } /* Terminating entry */
		1691	};
		1692
		1693	MODULE_DEVICE_TABLE (usb, hid_usb_ids);
		1694
		1695	static struct usb_driver hid_driver = {
		1696	.owner = THIS_MODULE,
		1697	.name = "hid",
		1698	.probe = hid_probe,
		1699	.disconnect = hid_disconnect,
		1700	.id_table = hid_usb_ids,
		1701	};
		1702
		1703	/static/ int __init hid_init(void)
		1704	{
		1705	int retval;
		1706	retval = hiddev_init();
		1707	if (retval)
		1708	goto hiddev_init_fail;
		1709	retval = usb_register(&hid_driver);
		1710	if (retval)
		1711	goto usb_register_fail;
		1712	info(DRIVER_VERSION ":" DRIVER_DESC);
		1713
		1714	return 0;
		1715	usb_register_fail:
		1716	hiddev_exit();
		1717	hiddev_init_fail:
		1718	return retval;
		1719	}
		1720
		1721	/static/ void __exit hid_exit(void)
		1722	{
		1723	hiddev_exit();
		1724	usb_deregister(&hid_driver);
		1725	}
		1726
		1727	module_init(hid_init);
		1728	module_exit(hid_exit);
		1729
		1730	MODULE_AUTHOR(DRIVER_AUTHOR);
		1731	MODULE_DESCRIPTION(DRIVER_DESC);
		1732	MODULE_LICENSE(DRIVER_LICENSE);

Subversion Repositories shark

(root)/shark/trunk/drivers/usb/input/hid-core.c - Rev 1057