124 static int open_collection(struct hid_parser *parser, unsigned type)  in open_collection()  argument
129 	usage = parser->local.usage[0];  in open_collection()
131 	if (parser->collection_stack_ptr == parser->collection_stack_size) {  in open_collection()
133 		unsigned int new_size = parser->collection_stack_size +  in open_collection()
136 		collection_stack = krealloc(parser->collection_stack,  in open_collection()
142 		parser->collection_stack = collection_stack;  in open_collection()
143 		parser->collection_stack_size = new_size;  in open_collection()
146 	if (parser->device->maxcollection == parser->device->collection_size) {  in open_collection()
149 					    parser->device->collection_size,  in open_collection()
153 			hid_err(parser->device, "failed to reallocate collection array\n");  in open_collection()
156 		memcpy(collection, parser->device->collection,  in open_collection()
158 			parser->device->collection_size);  in open_collection()
159 		memset(collection + parser->device->collection_size, 0,  in open_collection()
161 			parser->device->collection_size);  in open_collection()
162 		kfree(parser->device->collection);  in open_collection()
163 		parser->device->collection = collection;  in open_collection()
164 		parser->device->collection_size *= 2;  in open_collection()
167 	parser->collection_stack[parser->collection_stack_ptr++] =  in open_collection()
168 		parser->device->maxcollection;  in open_collection()
170 	collection = parser->device->collection +  in open_collection()
171 		parser->device->maxcollection++;  in open_collection()
174 	collection->level = parser->collection_stack_ptr - 1;  in open_collection()
177 		parser->device->maxapplication++;  in open_collection()
186 static int close_collection(struct hid_parser *parser)  in close_collection()  argument
188 	if (!parser->collection_stack_ptr) {  in close_collection()
189 		hid_err(parser->device, "collection stack underflow\n");  in close_collection()
192 	parser->collection_stack_ptr--;  in close_collection()
201 static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)  in hid_lookup_collection()  argument
203 	struct hid_collection *collection = parser->device->collection;  in hid_lookup_collection()
206 	for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {  in hid_lookup_collection()
207 		unsigned index = parser->collection_stack[n];  in hid_lookup_collection()
218 static int hid_add_usage(struct hid_parser *parser, unsigned usage)  in hid_add_usage()  argument
220 	if (parser->local.usage_index >= HID_MAX_USAGES) {  in hid_add_usage()
221 		hid_err(parser->device, "usage index exceeded\n");  in hid_add_usage()
224 	parser->local.usage[parser->local.usage_index] = usage;  in hid_add_usage()
225 	parser->local.collection_index[parser->local.usage_index] =  in hid_add_usage()
226 		parser->collection_stack_ptr ?  in hid_add_usage()
227 		parser->collection_stack[parser->collection_stack_ptr - 1] : 0;  in hid_add_usage()
228 	parser->local.usage_index++;  in hid_add_usage()
236 static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsigned flags)  in hid_add_field()  argument
245 	application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);  in hid_add_field()
247 	report = hid_register_report(parser->device, report_type,  in hid_add_field()
248 				     parser->global.report_id, application);  in hid_add_field()
250 		hid_err(parser->device, "hid_register_report failed\n");  in hid_add_field()
255 	if ((parser->global.logical_minimum < 0 &&  in hid_add_field()
256 		parser->global.logical_maximum <  in hid_add_field()
257 		parser->global.logical_minimum) ||  in hid_add_field()
258 		(parser->global.logical_minimum >= 0 &&  in hid_add_field()
259 		(__u32)parser->global.logical_maximum <  in hid_add_field()
260 		(__u32)parser->global.logical_minimum)) {  in hid_add_field()
262 			parser->global.logical_minimum,  in hid_add_field()
263 			parser->global.logical_maximum);  in hid_add_field()
268 	report->size += parser->global.report_size * parser->global.report_count;  in hid_add_field()
270 	if (!parser->local.usage_index) /* Ignore padding fields */  in hid_add_field()
273 	usages = max_t(unsigned, parser->local.usage_index,  in hid_add_field()
274 				 parser->global.report_count);  in hid_add_field()
276 	field = hid_register_field(report, usages, parser->global.report_count);  in hid_add_field()
280 	field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);  in hid_add_field()
281 	field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);  in hid_add_field()
287 		if (i >= parser->local.usage_index)  in hid_add_field()
288 			j = parser->local.usage_index - 1;  in hid_add_field()
289 		field->usage[i].hid = parser->local.usage[j];  in hid_add_field()
291 			parser->local.collection_index[j];  in hid_add_field()
299 	field->report_size = parser->global.report_size;  in hid_add_field()
300 	field->report_count = parser->global.report_count;  in hid_add_field()
301 	field->logical_minimum = parser->global.logical_minimum;  in hid_add_field()
302 	field->logical_maximum = parser->global.logical_maximum;  in hid_add_field()
303 	field->physical_minimum = parser->global.physical_minimum;  in hid_add_field()
304 	field->physical_maximum = parser->global.physical_maximum;  in hid_add_field()
305 	field->unit_exponent = parser->global.unit_exponent;  in hid_add_field()
306 	field->unit = parser->global.unit;  in hid_add_field()
339 static int hid_parser_global(struct hid_parser *parser, struct hid_item *item)  in hid_parser_global()  argument
345 		if (parser->global_stack_ptr == HID_GLOBAL_STACK_SIZE) {  in hid_parser_global()
346 			hid_err(parser->device, "global environment stack overflow\n");  in hid_parser_global()
350 		memcpy(parser->global_stack + parser->global_stack_ptr++,  in hid_parser_global()
351 			&parser->global, sizeof(struct hid_global));  in hid_parser_global()
356 		if (!parser->global_stack_ptr) {  in hid_parser_global()
357 			hid_err(parser->device, "global environment stack underflow\n");  in hid_parser_global()
361 		memcpy(&parser->global, parser->global_stack +  in hid_parser_global()
362 			--parser->global_stack_ptr, sizeof(struct hid_global));  in hid_parser_global()
366 		parser->global.usage_page = item_udata(item);  in hid_parser_global()
370 		parser->global.logical_minimum = item_sdata(item);  in hid_parser_global()
374 		if (parser->global.logical_minimum < 0)  in hid_parser_global()
375 			parser->global.logical_maximum = item_sdata(item);  in hid_parser_global()
377 			parser->global.logical_maximum = item_udata(item);  in hid_parser_global()
381 		parser->global.physical_minimum = item_sdata(item);  in hid_parser_global()
385 		if (parser->global.physical_minimum < 0)  in hid_parser_global()
386 			parser->global.physical_maximum = item_sdata(item);  in hid_parser_global()
388 			parser->global.physical_maximum = item_udata(item);  in hid_parser_global()
398 			parser->global.unit_exponent = hid_snto32(raw_value, 4);  in hid_parser_global()
400 			parser->global.unit_exponent = raw_value;  in hid_parser_global()
404 		parser->global.unit = item_udata(item);  in hid_parser_global()
408 		parser->global.report_size = item_udata(item);  in hid_parser_global()
409 		if (parser->global.report_size > 128) {  in hid_parser_global()
410 			hid_err(parser->device, "invalid report_size %d\n",  in hid_parser_global()
411 					parser->global.report_size);  in hid_parser_global()
417 		parser->global.report_count = item_udata(item);  in hid_parser_global()
418 		if (parser->global.report_count > HID_MAX_USAGES) {  in hid_parser_global()
419 			hid_err(parser->device, "invalid report_count %d\n",  in hid_parser_global()
420 					parser->global.report_count);  in hid_parser_global()
426 		parser->global.report_id = item_udata(item);  in hid_parser_global()
427 		if (parser->global.report_id == 0 ||  in hid_parser_global()
428 		    parser->global.report_id >= HID_MAX_IDS) {  in hid_parser_global()
429 			hid_err(parser->device, "report_id %u is invalid\n",  in hid_parser_global()
430 				parser->global.report_id);  in hid_parser_global()
436 		hid_err(parser->device, "unknown global tag 0x%x\n", item->tag);  in hid_parser_global()
445 static int hid_parser_local(struct hid_parser *parser, struct hid_item *item)  in hid_parser_local()  argument
463 			if (parser->local.delimiter_depth != 0) {  in hid_parser_local()
464 				hid_err(parser->device, "nested delimiters\n");  in hid_parser_local()
467 			parser->local.delimiter_depth++;  in hid_parser_local()
468 			parser->local.delimiter_branch++;  in hid_parser_local()
470 			if (parser->local.delimiter_depth < 1) {  in hid_parser_local()
471 				hid_err(parser->device, "bogus close delimiter\n");  in hid_parser_local()
474 			parser->local.delimiter_depth--;  in hid_parser_local()
480 		if (parser->local.delimiter_branch > 1) {  in hid_parser_local()
486 			data = (parser->global.usage_page << 16) + data;  in hid_parser_local()
488 		return hid_add_usage(parser, data);  in hid_parser_local()
492 		if (parser->local.delimiter_branch > 1) {  in hid_parser_local()
498 			data = (parser->global.usage_page << 16) + data;  in hid_parser_local()
500 		parser->local.usage_minimum = data;  in hid_parser_local()
505 		if (parser->local.delimiter_branch > 1) {  in hid_parser_local()
511 			data = (parser->global.usage_page << 16) + data;  in hid_parser_local()
513 		count = data - parser->local.usage_minimum;  in hid_parser_local()
514 		if (count + parser->local.usage_index >= HID_MAX_USAGES) {  in hid_parser_local()
519 			if (dev_name(&parser->device->dev))  in hid_parser_local()
520 				hid_warn(parser->device,  in hid_parser_local()
522 			data = HID_MAX_USAGES - parser->local.usage_index +  in hid_parser_local()
523 				parser->local.usage_minimum - 1;  in hid_parser_local()
525 				hid_err(parser->device,  in hid_parser_local()
531 		for (n = parser->local.usage_minimum; n <= data; n++)  in hid_parser_local()
532 			if (hid_add_usage(parser, n)) {  in hid_parser_local()
550 static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)  in hid_parser_main()  argument
559 		ret = open_collection(parser, data & 0xff);  in hid_parser_main()
562 		ret = close_collection(parser);  in hid_parser_main()
565 		ret = hid_add_field(parser, HID_INPUT_REPORT, data);  in hid_parser_main()
568 		ret = hid_add_field(parser, HID_OUTPUT_REPORT, data);  in hid_parser_main()
571 		ret = hid_add_field(parser, HID_FEATURE_REPORT, data);  in hid_parser_main()
574 		hid_warn(parser->device, "unknown main item tag 0x%x\n", item->tag);  in hid_parser_main()
578 	memset(&parser->local, 0, sizeof(parser->local));	/* Reset the local parser environment */  in hid_parser_main()
587 static int hid_parser_reserved(struct hid_parser *parser, struct hid_item *item)  in hid_parser_reserved()  argument
721 static void hid_scan_input_usage(struct hid_parser *parser, u32 usage)  in hid_scan_input_usage()  argument
723 	struct hid_device *hid = parser->device;  in hid_scan_input_usage()
729 static void hid_scan_feature_usage(struct hid_parser *parser, u32 usage)  in hid_scan_feature_usage()  argument
731 	if (usage == 0xff0000c5 && parser->global.report_count == 256 &&  in hid_scan_feature_usage()
732 	    parser->global.report_size == 8)  in hid_scan_feature_usage()
733 		parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8;  in hid_scan_feature_usage()
736 static void hid_scan_collection(struct hid_parser *parser, unsigned type)  in hid_scan_collection()  argument
738 	struct hid_device *hid = parser->device;  in hid_scan_collection()
741 	if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&  in hid_scan_collection()
750 	if ((parser->global.usage_page << 16) == HID_UP_GENDESK)  in hid_scan_collection()
751 		for (i = 0; i < parser->local.usage_index; i++)  in hid_scan_collection()
752 			if (parser->local.usage[i] == HID_GD_POINTER)  in hid_scan_collection()
753 				parser->scan_flags |= HID_SCAN_FLAG_GD_POINTER;  in hid_scan_collection()
755 	if ((parser->global.usage_page << 16) >= HID_UP_MSVENDOR)  in hid_scan_collection()
756 		parser->scan_flags |= HID_SCAN_FLAG_VENDOR_SPECIFIC;  in hid_scan_collection()
759 static int hid_scan_main(struct hid_parser *parser, struct hid_item *item)  in hid_scan_main()  argument
768 		hid_scan_collection(parser, data & 0xff);  in hid_scan_main()
776 		for (i = 0; i < parser->local.usage_index; i++)  in hid_scan_main()
777 			hid_scan_input_usage(parser, parser->local.usage[i]);  in hid_scan_main()
782 		for (i = 0; i < parser->local.usage_index; i++)  in hid_scan_main()
783 			hid_scan_feature_usage(parser, parser->local.usage[i]);  in hid_scan_main()
788 	memset(&parser->local, 0, sizeof(parser->local));  in hid_scan_main()
800 	struct hid_parser *parser;  in hid_scan_report()  local
804 	static int (*dispatch_type[])(struct hid_parser *parser,  in hid_scan_report()
812 	parser = vzalloc(sizeof(struct hid_parser));  in hid_scan_report()
813 	if (!parser)  in hid_scan_report()
816 	parser->device = hid;  in hid_scan_report()
825 		dispatch_type[item.type](parser, &item);  in hid_scan_report()
830 	if ((parser->scan_flags & HID_SCAN_FLAG_MT_WIN_8) &&  in hid_scan_report()
843 			if ((parser->scan_flags & HID_SCAN_FLAG_VENDOR_SPECIFIC)  in hid_scan_report()
844 			    && (parser->scan_flags & HID_SCAN_FLAG_GD_POINTER))  in hid_scan_report()
853 	kfree(parser->collection_stack);  in hid_scan_report()
854 	vfree(parser);  in hid_scan_report()
960 	struct hid_parser *parser;  in hid_open_report()  local
967 	static int (*dispatch_type[])(struct hid_parser *parser,  in hid_open_report()
1000 	parser = vzalloc(sizeof(struct hid_parser));  in hid_open_report()
1001 	if (!parser) {  in hid_open_report()
1006 	parser->device = device;  in hid_open_report()
1026 		if (dispatch_type[item.type](parser, &item)) {  in hid_open_report()
1034 			if (parser->collection_stack_ptr) {  in hid_open_report()
1038 			if (parser->local.delimiter_depth) {  in hid_open_report()
1042 			kfree(parser->collection_stack);  in hid_open_report()
1043 			vfree(parser);  in hid_open_report()
1051 	kfree(parser->collection_stack);  in hid_open_report()
1053 	vfree(parser);  in hid_open_report()