aboutsummaryrefslogtreecommitdiff
path: root/drivers/hid/hid-multitouch.c
blob: ac28f08c38660b0051500242f8562b587007cf90 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
/*
 *  HID driver for multitouch panels
 *
 *  Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
 *  Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
 *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
 *  Copyright (c) 2012-2013 Red Hat, Inc
 *
 *  This code is partly based on hid-egalax.c:
 *
 *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
 *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
 *  Copyright (c) 2010 Canonical, Ltd.
 *
 *  This code is partly based on hid-3m-pct.c:
 *
 *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
 *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
 *  Copyright (c) 2010      Canonical, Ltd.
 *
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 */

/*
 * This driver is regularly tested thanks to the tool hid-test[1].
 * This tool relies on hid-replay[2] and a database of hid devices[3].
 * Please run these regression tests before patching this module so that
 * your patch won't break existing known devices.
 *
 * [1] https://github.com/bentiss/hid-test
 * [2] https://github.com/bentiss/hid-replay
 * [3] https://github.com/bentiss/hid-devices
 */

#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/input/mt.h>
#include <linux/string.h>


MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
MODULE_DESCRIPTION("HID multitouch panels");
MODULE_LICENSE("GPL");

#include "hid-ids.h"

/* quirks to control the device */
#define MT_QUIRK_NOT_SEEN_MEANS_UP	(1 << 0)
#define MT_QUIRK_SLOT_IS_CONTACTID	(1 << 1)
#define MT_QUIRK_CYPRESS		(1 << 2)
#define MT_QUIRK_SLOT_IS_CONTACTNUMBER	(1 << 3)
#define MT_QUIRK_ALWAYS_VALID		(1 << 4)
#define MT_QUIRK_VALID_IS_INRANGE	(1 << 5)
#define MT_QUIRK_VALID_IS_CONFIDENCE	(1 << 6)
#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE	(1 << 8)
#define MT_QUIRK_NO_AREA		(1 << 9)
#define MT_QUIRK_IGNORE_DUPLICATES	(1 << 10)
#define MT_QUIRK_HOVERING		(1 << 11)
#define MT_QUIRK_CONTACT_CNT_ACCURATE	(1 << 12)

struct mt_slot {
	__s32 x, y, cx, cy, p, w, h;
	__s32 contactid;	/* the device ContactID assigned to this slot */
	bool touch_state;	/* is the touch valid? */
	bool inrange_state;	/* is the finger in proximity of the sensor? */
};

struct mt_class {
	__s32 name;	/* MT_CLS */
	__s32 quirks;
	__s32 sn_move;	/* Signal/noise ratio for move events */
	__s32 sn_width;	/* Signal/noise ratio for width events */
	__s32 sn_height;	/* Signal/noise ratio for height events */
	__s32 sn_pressure;	/* Signal/noise ratio for pressure events */
	__u8 maxcontacts;
	bool is_indirect;	/* true for touchpads */
};

struct mt_fields {
	unsigned usages[HID_MAX_FIELDS];
	unsigned int length;
};

struct mt_device {
	struct mt_slot curdata;	/* placeholder of incoming data */
	struct mt_class mtclass;	/* our mt device class */
	struct mt_fields *fields;	/* temporary placeholder for storing the
					   multitouch fields */
	int cc_index;	/* contact count field index in the report */
	int cc_value_index;	/* contact count value index in the field */
	unsigned last_slot_field;	/* the last field of a slot */
	unsigned mt_report_id;	/* the report ID of the multitouch device */
	unsigned pen_report_id;	/* the report ID of the pen device */
	__s8 inputmode;		/* InputMode HID feature, -1 if non-existent */
	__s8 inputmode_index;	/* InputMode HID feature index in the report */
	__s8 maxcontact_report_id;	/* Maximum Contact Number HID feature,
				   -1 if non-existent */
	__u8 num_received;	/* how many contacts we received */
	__u8 num_expected;	/* expected last contact index */
	__u8 maxcontacts;
	__u8 touches_by_report;	/* how many touches are present in one report:
				* 1 means we should use a serial protocol
				* > 1 means hybrid (multitouch) protocol */
	bool serial_maybe;	/* need to check for serial protocol */
	bool curvalid;		/* is the current contact valid? */
	unsigned mt_flags;	/* flags to pass to input-mt */
};

static void mt_post_parse_default_settings(struct mt_device *td);
static void mt_post_parse(struct mt_device *td);

/* classes of device behavior */
#define MT_CLS_DEFAULT				0x0001

#define MT_CLS_SERIAL				0x0002
#define MT_CLS_CONFIDENCE			0x0003
#define MT_CLS_CONFIDENCE_CONTACT_ID		0x0004
#define MT_CLS_CONFIDENCE_MINUS_ONE		0x0005
#define MT_CLS_DUAL_INRANGE_CONTACTID		0x0006
#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER	0x0007
#define MT_CLS_DUAL_NSMU_CONTACTID		0x0008
#define MT_CLS_INRANGE_CONTACTNUMBER		0x0009
#define MT_CLS_NSMU				0x000a
#define MT_CLS_DUAL_CONTACT_NUMBER		0x0010
#define MT_CLS_DUAL_CONTACT_ID			0x0011
#define MT_CLS_WIN_8				0x0012

/* vendor specific classes */
#define MT_CLS_3M				0x0101
#define MT_CLS_CYPRESS				0x0102
#define MT_CLS_EGALAX				0x0103
#define MT_CLS_EGALAX_SERIAL			0x0104
#define MT_CLS_TOPSEED				0x0105
#define MT_CLS_PANASONIC			0x0106
#define MT_CLS_FLATFROG				0x0107
#define MT_CLS_GENERALTOUCH_TWOFINGERS		0x0108
#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS	0x0109

#define MT_DEFAULT_MAXCONTACT	10
#define MT_MAX_MAXCONTACT	250

#define MT_USB_DEVICE(v, p)	HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
#define MT_BT_DEVICE(v, p)	HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)

/*
 * these device-dependent functions determine what slot corresponds
 * to a valid contact that was just read.
 */

static int cypress_compute_slot(struct mt_device *td)
{
	if (td->curdata.contactid != 0 || td->num_received == 0)
		return td->curdata.contactid;
	else
		return -1;
}

static struct mt_class mt_classes[] = {
	{ .name = MT_CLS_DEFAULT,
		.quirks = MT_QUIRK_ALWAYS_VALID |
			MT_QUIRK_CONTACT_CNT_ACCURATE },
	{ .name = MT_CLS_NSMU,
		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
	{ .name = MT_CLS_SERIAL,
		.quirks = MT_QUIRK_ALWAYS_VALID},
	{ .name = MT_CLS_CONFIDENCE,
		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
	{ .name = MT_CLS_CONFIDENCE_CONTACT_ID,
		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
			MT_QUIRK_SLOT_IS_CONTACTID },
	{ .name = MT_CLS_CONFIDENCE_MINUS_ONE,
		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
			MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
	{ .name = MT_CLS_DUAL_INRANGE_CONTACTID,
		.quirks = MT_QUIRK_VALID_IS_INRANGE |
			MT_QUIRK_SLOT_IS_CONTACTID,
		.maxcontacts = 2 },
	{ .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
		.quirks = MT_QUIRK_VALID_IS_INRANGE |
			MT_QUIRK_SLOT_IS_CONTACTNUMBER,
		.maxcontacts = 2 },
	{ .name = MT_CLS_DUAL_NSMU_CONTACTID,
		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
			MT_QUIRK_SLOT_IS_CONTACTID,
		.maxcontacts = 2 },
	{ .name = MT_CLS_INRANGE_CONTACTNUMBER,
		.quirks = MT_QUIRK_VALID_IS_INRANGE |
			MT_QUIRK_SLOT_IS_CONTACTNUMBER },
	{ .name = MT_CLS_DUAL_CONTACT_NUMBER,
		.quirks = MT_QUIRK_ALWAYS_VALID |
			MT_QUIRK_CONTACT_CNT_ACCURATE |
			MT_QUIRK_SLOT_IS_CONTACTNUMBER,
		.maxcontacts = 2 },
	{ .name = MT_CLS_DUAL_CONTACT_ID,
		.quirks = MT_QUIRK_ALWAYS_VALID |
			MT_QUIRK_CONTACT_CNT_ACCURATE |
			MT_QUIRK_SLOT_IS_CONTACTID,
		.maxcontacts = 2 },
	{ .name = MT_CLS_WIN_8,
		.quirks = MT_QUIRK_ALWAYS_VALID |
			MT_QUIRK_IGNORE_DUPLICATES |
			MT_QUIRK_HOVERING |
			MT_QUIRK_CONTACT_CNT_ACCURATE },

	/*
	 * vendor specific classes
	 */
	{ .name = MT_CLS_3M,
		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
			MT_QUIRK_SLOT_IS_CONTACTID,
		.sn_move = 2048,
		.sn_width = 128,
		.sn_height = 128,
		.maxcontacts = 60,
	},
	{ .name = MT_CLS_CYPRESS,
		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
			MT_QUIRK_CYPRESS,
		.maxcontacts = 10 },
	{ .name = MT_CLS_EGALAX,
		.quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
			MT_QUIRK_VALID_IS_INRANGE,
		.sn_move = 4096,
		.sn_pressure = 32,
	},
	{ .name = MT_CLS_EGALAX_SERIAL,
		.quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
			MT_QUIRK_ALWAYS_VALID,
		.sn_move = 4096,
		.sn_pressure = 32,
	},
	{ .name = MT_CLS_TOPSEED,
		.quirks = MT_QUIRK_ALWAYS_VALID,
		.is_indirect = true,
		.maxcontacts = 2,
	},
	{ .name = MT_CLS_PANASONIC,
		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
		.maxcontacts = 4 },
	{ .name	= MT_CLS_GENERALTOUCH_TWOFINGERS,
		.quirks	= MT_QUIRK_NOT_SEEN_MEANS_UP |
			MT_QUIRK_VALID_IS_INRANGE |
			MT_QUIRK_SLOT_IS_CONTACTNUMBER,
		.maxcontacts = 2
	},
	{ .name	= MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
		.quirks	= MT_QUIRK_NOT_SEEN_MEANS_UP |
			MT_QUIRK_SLOT_IS_CONTACTNUMBER
	},

	{ .name = MT_CLS_FLATFROG,
		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
			MT_QUIRK_NO_AREA,
		.sn_move = 2048,
		.maxcontacts = 40,
	},
	{ }
};

static ssize_t mt_show_quirks(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct mt_device *td = hid_get_drvdata(hdev);

	return sprintf(buf, "%u\n", td->mtclass.quirks);
}

static ssize_t mt_set_quirks(struct device *dev,
			  struct device_attribute *attr,
			  const char *buf, size_t count)
{
	struct hid_device *hdev = container_of(dev, struct hid_device, dev);
	struct mt_device *td = hid_get_drvdata(hdev);

	unsigned long val;

	if (kstrtoul(buf, 0, &val))
		return -EINVAL;

	td->mtclass.quirks = val;

	if (td->cc_index < 0)
		td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;

	return count;
}

static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);

static struct attribute *sysfs_attrs[] = {
	&dev_attr_quirks.attr,
	NULL
};

static struct attribute_group mt_attribute_group = {
	.attrs = sysfs_attrs
};

static void mt_feature_mapping(struct hid_device *hdev,
		struct hid_field *field, struct hid_usage *usage)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	int i;

	switch (usage->hid) {
	case HID_DG_INPUTMODE:
		td->inputmode = field->report->id;
		td->inputmode_index = 0; /* has to be updated below */

		for (i=0; i < field->maxusage; i++) {
			if (field->usage[i].hid == usage->hid) {
				td->inputmode_index = i;
				break;
			}
		}

		break;
	case HID_DG_CONTACTMAX:
		td->maxcontact_report_id = field->report->id;
		td->maxcontacts = field->value[0];
		if (!td->maxcontacts &&
		    field->logical_maximum <= MT_MAX_MAXCONTACT)
			td->maxcontacts = field->logical_maximum;
		if (td->mtclass.maxcontacts)
			/* check if the maxcontacts is given by the class */
			td->maxcontacts = td->mtclass.maxcontacts;

		break;
	}
}

static void set_abs(struct input_dev *input, unsigned int code,
		struct hid_field *field, int snratio)
{
	int fmin = field->logical_minimum;
	int fmax = field->logical_maximum;
	int fuzz = snratio ? (fmax - fmin) / snratio : 0;
	input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
	input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
}

static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
		struct hid_input *hi)
{
	struct mt_fields *f = td->fields;

	if (f->length >= HID_MAX_FIELDS)
		return;

	f->usages[f->length++] = usage->hid;
}

static int mt_pen_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	struct mt_device *td = hid_get_drvdata(hdev);

	td->pen_report_id = field->report->id;

	return 0;
}

static int mt_pen_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	return 0;
}

static int mt_pen_event(struct hid_device *hid, struct hid_field *field,
				struct hid_usage *usage, __s32 value)
{
	/* let hid-input handle it */
	return 0;
}

static void mt_pen_report(struct hid_device *hid, struct hid_report *report)
{
	struct hid_field *field = report->field[0];

	input_sync(field->hidinput->input);
}

static void mt_pen_input_configured(struct hid_device *hdev,
					struct hid_input *hi)
{
	/* force BTN_STYLUS to allow tablet matching in udev */
	__set_bit(BTN_STYLUS, hi->input->keybit);
}

static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	struct mt_class *cls = &td->mtclass;
	int code;
	struct hid_usage *prev_usage = NULL;

	if (field->application == HID_DG_TOUCHSCREEN)
		td->mt_flags |= INPUT_MT_DIRECT;

	/*
	 * Model touchscreens providing buttons as touchpads.
	 */
	if (field->application == HID_DG_TOUCHPAD ||
	    (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
		td->mt_flags |= INPUT_MT_POINTER;

	if (usage->usage_index)
		prev_usage = &field->usage[usage->usage_index - 1];

	switch (usage->hid & HID_USAGE_PAGE) {

	case HID_UP_GENDESK:
		switch (usage->hid) {
		case HID_GD_X:
			if (prev_usage && (prev_usage->hid == usage->hid)) {
				hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOOL_X);
				set_abs(hi->input, ABS_MT_TOOL_X, field,
					cls->sn_move);
			} else {
				hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_POSITION_X);
				set_abs(hi->input, ABS_MT_POSITION_X, field,
					cls->sn_move);
			}

			mt_store_field(usage, td, hi);
			return 1;
		case HID_GD_Y:
			if (prev_usage && (prev_usage->hid == usage->hid)) {
				hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOOL_Y);
				set_abs(hi->input, ABS_MT_TOOL_Y, field,
					cls->sn_move);
			} else {
				hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_POSITION_Y);
				set_abs(hi->input, ABS_MT_POSITION_Y, field,
					cls->sn_move);
			}

			mt_store_field(usage, td, hi);
			return 1;
		}
		return 0;

	case HID_UP_DIGITIZER:
		switch (usage->hid) {
		case HID_DG_INRANGE:
			if (cls->quirks & MT_QUIRK_HOVERING) {
				hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_DISTANCE);
				input_set_abs_params(hi->input,
					ABS_MT_DISTANCE, 0, 1, 0, 0);
			}
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_CONFIDENCE:
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_TIPSWITCH:
			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_CONTACTID:
			mt_store_field(usage, td, hi);
			td->touches_by_report++;
			td->mt_report_id = field->report->id;
			return 1;
		case HID_DG_WIDTH:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOUCH_MAJOR);
			if (!(cls->quirks & MT_QUIRK_NO_AREA))
				set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
					cls->sn_width);
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_HEIGHT:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_TOUCH_MINOR);
			if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
				set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
					cls->sn_height);
				input_set_abs_params(hi->input,
					ABS_MT_ORIENTATION, 0, 1, 0, 0);
			}
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_TIPPRESSURE:
			hid_map_usage(hi, usage, bit, max,
					EV_ABS, ABS_MT_PRESSURE);
			set_abs(hi->input, ABS_MT_PRESSURE, field,
				cls->sn_pressure);
			mt_store_field(usage, td, hi);
			return 1;
		case HID_DG_CONTACTCOUNT:
			td->cc_index = field->index;
			td->cc_value_index = usage->usage_index;
			return 1;
		case HID_DG_CONTACTMAX:
			/* we don't set td->last_slot_field as contactcount and
			 * contact max are global to the report */
			return -1;
		case HID_DG_TOUCH:
			/* Legacy devices use TIPSWITCH and not TOUCH.
			 * Let's just ignore this field. */
			return -1;
		}
		/* let hid-input decide for the others */
		return 0;

	case HID_UP_BUTTON:
		code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
		hid_map_usage(hi, usage, bit, max, EV_KEY, code);
		input_set_capability(hi->input, EV_KEY, code);
		return 1;

	case 0xff000000:
		/* we do not want to map these: no input-oriented meaning */
		return -1;
	}

	return 0;
}

static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	if (usage->type == EV_KEY || usage->type == EV_ABS)
		set_bit(usage->type, hi->input->evbit);

	return -1;
}

static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
{
	__s32 quirks = td->mtclass.quirks;

	if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
		return td->curdata.contactid;

	if (quirks & MT_QUIRK_CYPRESS)
		return cypress_compute_slot(td);

	if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
		return td->num_received;

	if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
		return td->curdata.contactid - 1;

	return input_mt_get_slot_by_key(input, td->curdata.contactid);
}

/*
 * this function is called when a whole contact has been processed,
 * so that it can assign it to a slot and store the data there
 */
static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
{
	if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
	    td->num_received >= td->num_expected)
		return;

	if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
		int slotnum = mt_compute_slot(td, input);
		struct mt_slot *s = &td->curdata;
		struct input_mt *mt = input->mt;

		if (slotnum < 0 || slotnum >= td->maxcontacts)
			return;

		if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
			struct input_mt_slot *slot = &mt->slots[slotnum];
			if (input_mt_is_active(slot) &&
			    input_mt_is_used(mt, slot))
				return;
		}

		input_mt_slot(input, slotnum);
		input_mt_report_slot_state(input, MT_TOOL_FINGER,
			s->touch_state || s->inrange_state);
		if (s->touch_state || s->inrange_state) {
			/* this finger is in proximity of the sensor */
			int wide = (s->w > s->h);
			/* divided by two to match visual scale of touch */
			int major = max(s->w, s->h) >> 1;
			int minor = min(s->w, s->h) >> 1;

			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
			input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
			input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
			input_event(input, EV_ABS, ABS_MT_DISTANCE,
				!s->touch_state);
			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
		}
	}

	td->num_received++;
}

/*
 * this function is called when a whole packet has been received and processed,
 * so that it can decide what to send to the input layer.
 */
static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
{
	input_mt_sync_frame(input);
	input_sync(input);
	td->num_received = 0;
}

static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
				struct hid_usage *usage, __s32 value)
{
	/* we will handle the hidinput part later, now remains hiddev */
	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
		hid->hiddev_hid_event(hid, field, usage, value);

	return 1;
}

static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
				struct hid_usage *usage, __s32 value)
{
	struct mt_device *td = hid_get_drvdata(hid);
	__s32 quirks = td->mtclass.quirks;
	struct input_dev *input = field->hidinput->input;

	if (hid->claimed & HID_CLAIMED_INPUT) {
		switch (usage->hid) {
		case HID_DG_INRANGE:
			if (quirks & MT_QUIRK_VALID_IS_INRANGE)
				td->curvalid = value;
			if (quirks & MT_QUIRK_HOVERING)
				td->curdata.inrange_state = value;
			break;
		case HID_DG_TIPSWITCH:
			if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
				td->curvalid = value;
			td->curdata.touch_state = value;
			break;
		case HID_DG_CONFIDENCE:
			if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
				td->curvalid = value;
			break;
		case HID_DG_CONTACTID:
			td->curdata.contactid = value;
			break;
		case HID_DG_TIPPRESSURE:
			td->curdata.p = value;
			break;
		case HID_GD_X:
			if (usage->code == ABS_MT_TOOL_X)
				td->curdata.cx = value;
			else
				td->curdata.x = value;
			break;
		case HID_GD_Y:
			if (usage->code == ABS_MT_TOOL_Y)
				td->curdata.cy = value;
			else
				td->curdata.y = value;
			break;
		case HID_DG_WIDTH:
			td->curdata.w = value;
			break;
		case HID_DG_HEIGHT:
			td->curdata.h = value;
			break;
		case HID_DG_CONTACTCOUNT:
			break;
		case HID_DG_TOUCH:
			/* do nothing */
			break;

		default:
			if (usage->type)
				input_event(input, usage->type, usage->code,
						value);
			return;
		}

		if (usage->usage_index + 1 == field->report_count) {
			/* we only take into account the last report. */
			if (usage->hid == td->last_slot_field)
				mt_complete_slot(td, field->hidinput->input);
		}

	}
}

static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
{
	struct mt_device *td = hid_get_drvdata(hid);
	struct hid_field *field;
	unsigned count;
	int r, n;

	/*
	 * Includes multi-packet support where subsequent
	 * packets are sent with zero contactcount.
	 */
	if (td->cc_index >= 0) {
		struct hid_field *field = report->field[td->cc_index];
		int value = field->value[td->cc_value_index];
		if (value)
			td->num_expected = value;
	}

	for (r = 0; r < report->maxfield; r++) {
		field = report->field[r];
		count = field->report_count;

		if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
			continue;

		for (n = 0; n < count; n++)
			mt_process_mt_event(hid, field, &field->usage[n],
					field->value[n]);
	}

	if (td->num_received >= td->num_expected)
		mt_sync_frame(td, report->field[0]->hidinput->input);
}

static void mt_touch_input_configured(struct hid_device *hdev,
					struct hid_input *hi)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	struct mt_class *cls = &td->mtclass;
	struct input_dev *input = hi->input;

	if (!td->maxcontacts)
		td->maxcontacts = MT_DEFAULT_MAXCONTACT;

	mt_post_parse(td);
	if (td->serial_maybe)
		mt_post_parse_default_settings(td);

	if (cls->is_indirect)
		td->mt_flags |= INPUT_MT_POINTER;

	if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
		td->mt_flags |= INPUT_MT_DROP_UNUSED;

	input_mt_init_slots(input, td->maxcontacts, td->mt_flags);

	td->mt_flags = 0;
}

static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	/* Only map fields from TouchScreen or TouchPad collections.
	* We need to ignore fields that belong to other collections
	* such as Mouse that might have the same GenericDesktop usages. */
	if (field->application != HID_DG_TOUCHSCREEN &&
	    field->application != HID_DG_PEN &&
	    field->application != HID_DG_TOUCHPAD)
		return -1;

	if (field->physical == HID_DG_STYLUS)
		return mt_pen_input_mapping(hdev, hi, field, usage, bit, max);

	return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
}

static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	if (field->physical == HID_DG_STYLUS)
		return mt_pen_input_mapped(hdev, hi, field, usage, bit, max);

	return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
}

static int mt_event(struct hid_device *hid, struct hid_field *field,
				struct hid_usage *usage, __s32 value)
{
	struct mt_device *td = hid_get_drvdata(hid);

	if (field->report->id == td->mt_report_id)
		return mt_touch_event(hid, field, usage, value);

	if (field->report->id == td->pen_report_id)
		return mt_pen_event(hid, field, usage, value);

	/* ignore other reports */
	return 1;
}

static void mt_report(struct hid_device *hid, struct hid_report *report)
{
	struct mt_device *td = hid_get_drvdata(hid);

	if (!(hid->claimed & HID_CLAIMED_INPUT))
		return;

	if (report->id == td->mt_report_id)
		mt_touch_report(hid, report);

	if (report->id == td->pen_report_id)
		mt_pen_report(hid, report);
}

static void mt_set_input_mode(struct hid_device *hdev)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	struct hid_report *r;
	struct hid_report_enum *re;

	if (td->inputmode < 0)
		return;

	re = &(hdev->report_enum[HID_FEATURE_REPORT]);
	r = re->report_id_hash[td->inputmode];
	if (r) {
		r->field[0]->value[td->inputmode_index] = 0x02;
		hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
	}
}

static void mt_set_maxcontacts(struct hid_device *hdev)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	struct hid_report *r;
	struct hid_report_enum *re;
	int fieldmax, max;

	if (td->maxcontact_report_id < 0)
		return;

	if (!td->mtclass.maxcontacts)
		return;

	re = &hdev->report_enum[HID_FEATURE_REPORT];
	r = re->report_id_hash[td->maxcontact_report_id];
	if (r) {
		max = td->mtclass.maxcontacts;
		fieldmax = r->field[0]->logical_maximum;
		max = min(fieldmax, max);
		if (r->field[0]->value[0] != max) {
			r->field[0]->value[0] = max;
			hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
		}
	}
}

static void mt_post_parse_default_settings(struct mt_device *td)
{
	__s32 quirks = td->mtclass.quirks;

	/* unknown serial device needs special quirks */
	if (td->touches_by_report == 1) {
		quirks |= MT_QUIRK_ALWAYS_VALID;
		quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
		quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
		quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
		quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
	}

	td->mtclass.quirks = quirks;
}

static void mt_post_parse(struct mt_device *td)
{
	struct mt_fields *f = td->fields;
	struct mt_class *cls = &td->mtclass;

	if (td->touches_by_report > 0) {
		int field_count_per_touch = f->length / td->touches_by_report;
		td->last_slot_field = f->usages[field_count_per_touch - 1];
	}

	if (td->cc_index < 0)
		cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
}

static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
	struct mt_device *td = hid_get_drvdata(hdev);
	char *name;
	const char *suffix = NULL;

	if (hi->report->id == td->mt_report_id)
		mt_touch_input_configured(hdev, hi);

	if (hi->report->field[0]->physical == HID_DG_STYLUS) {
		suffix = "Pen";
		mt_pen_input_configured(hdev, hi);
	}

	if (suffix) {
		name = devm_kzalloc(&hi->input->dev,
				    strlen(hdev->name) + strlen(suffix) + 2,
				    GFP_KERNEL);
		if (name) {
			sprintf(name, "%s %s", hdev->name, suffix);
			hi->input->name = name;
		}
	}
}

static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret, i;
	struct mt_device *td;
	struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */

	for (i = 0; mt_classes[i].name ; i++) {
		if (id->driver_data == mt_classes[i].name) {
			mtclass = &(mt_classes[i]);
			break;
		}
	}

	/* This allows the driver to correctly support devices
	 * that emit events over several HID messages.
	 */
	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;

	/*
	 * This allows the driver to handle different input sensors
	 * that emits events through different reports on the same HID
	 * device.
	 */
	hdev->quirks |= HID_QUIRK_MULTI_INPUT;
	hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;

	/*
	 * Handle special quirks for Windows 8 certified devices.
	 */
	if (id->group == HID_GROUP_MULTITOUCH_WIN_8)
		/*
		 * Some multitouch screens do not like to be polled for input
		 * reports. Fortunately, the Win8 spec says that all touches
		 * should be sent during each report, making the initialization
		 * of input reports unnecessary.
		 */
		hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS;

	td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
	if (!td) {
		dev_err(&hdev->dev, "cannot allocate multitouch data\n");
		return -ENOMEM;
	}
	td->mtclass = *mtclass;
	td->inputmode = -1;
	td->maxcontact_report_id = -1;
	td->cc_index = -1;
	td->mt_report_id = -1;
	td->pen_report_id = -1;
	hid_set_drvdata(hdev, td);

	td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
				  GFP_KERNEL);
	if (!td->fields) {
		dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
		return -ENOMEM;
	}

	if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
		td->serial_maybe = true;

	ret = hid_parse(hdev);
	if (ret != 0)
		return ret;

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret)
		return ret;

	ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);

	mt_set_maxcontacts(hdev);
	mt_set_input_mode(hdev);

	/* release .fields memory as it is not used anymore */
	devm_kfree(&hdev->dev, td->fields);
	td->fields = NULL;

	return 0;
}

#ifdef CONFIG_PM
static int mt_reset_resume(struct hid_device *hdev)
{
	mt_set_maxcontacts(hdev);
	mt_set_input_mode(hdev);
	return 0;
}

static int mt_resume(struct hid_device *hdev)
{
	/* Some Elan legacy devices require SET_IDLE to be set on resume.
	 * It should be safe to send it to other devices too.
	 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */

	hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);

	return 0;
}
#endif

static void mt_remove(struct hid_device *hdev)
{
	sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
	hid_hw_stop(hdev);
}

static const struct hid_device_id mt_devices[] = {

	/* 3M panels */
	{ .driver_data = MT_CLS_3M,
		MT_USB_DEVICE(USB_VENDOR_ID_3M,
			USB_DEVICE_ID_3M1968) },
	{ .driver_data = MT_CLS_3M,
		MT_USB_DEVICE(USB_VENDOR_ID_3M,
			USB_DEVICE_ID_3M2256) },
	{ .driver_data = MT_CLS_3M,
		MT_USB_DEVICE(USB_VENDOR_ID_3M,
			USB_DEVICE_ID_3M3266) },

	/* ActionStar panels */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
			USB_DEVICE_ID_ACTIONSTAR_1011) },

	/* Atmel panels */
	{ .driver_data = MT_CLS_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
			USB_DEVICE_ID_ATMEL_MULTITOUCH) },
	{ .driver_data = MT_CLS_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
			USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },

	/* Baanto multitouch devices */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
			USB_DEVICE_ID_BAANTO_MT_190W2) },
	/* Cando panels */
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
	{ .driver_data = MT_CLS_DUAL_CONTACT_NUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },

	/* Chunghwa Telecom touch panels */
	{  .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
			USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },

	/* CVTouch panels */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
			USB_DEVICE_ID_CVTOUCH_SCREEN) },

	/* Cypress panel */
	{ .driver_data = MT_CLS_CYPRESS,
		HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
			USB_DEVICE_ID_CYPRESS_TRUETOUCH) },

	/* Data Modul easyMaxTouch */
	{ .driver_data = MT_CLS_DEFAULT,
		MT_USB_DEVICE(USB_VENDOR_ID_DATA_MODUL,
			USB_VENDOR_ID_DATA_MODUL_EASYMAXTOUCH) },

	/* eGalax devices (resistive) */
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },

	/* eGalax devices (capacitive) */
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
	{ .driver_data = MT_CLS_EGALAX,
		HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
	{ .driver_data = MT_CLS_EGALAX,
		HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
	{ .driver_data = MT_CLS_EGALAX,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
	{ .driver_data = MT_CLS_EGALAX_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },

	/* Elo TouchSystems IntelliTouch Plus panel */
	{ .driver_data = MT_CLS_DUAL_CONTACT_ID,
		MT_USB_DEVICE(USB_VENDOR_ID_ELO,
			USB_DEVICE_ID_ELO_TS2515) },

	/* Flatfrog Panels */
	{ .driver_data = MT_CLS_FLATFROG,
		MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
			USB_DEVICE_ID_MULTITOUCH_3200) },

	/* GeneralTouch panel */
	{ .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
		MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
			USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
	{ .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
		MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
			USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },

	/* Gametel game controller */
	{ .driver_data = MT_CLS_NSMU,
		MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
			USB_DEVICE_ID_GAMETEL_MT_MODE) },

	/* GoodTouch panels */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
			USB_DEVICE_ID_GOODTOUCH_000f) },

	/* Hanvon panels */
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
		MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
			USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },

	/* Ideacom panel */
	{ .driver_data = MT_CLS_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
			USB_DEVICE_ID_IDEACOM_IDC6650) },
	{ .driver_data = MT_CLS_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
			USB_DEVICE_ID_IDEACOM_IDC6651) },

	/* Ilitek dual touch panel */
	{  .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
			USB_DEVICE_ID_ILITEK_MULTITOUCH) },

	/* IRTOUCH panels */
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
		MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
			USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },

	/* LG Display panels */
	{ .driver_data = MT_CLS_DEFAULT,
		MT_USB_DEVICE(USB_VENDOR_ID_LG,
			USB_DEVICE_ID_LG_MULTITOUCH) },

	/* Lumio panels */
	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
		MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
			USB_DEVICE_ID_CRYSTALTOUCH) },
	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
		MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
			USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },

	/* MosArt panels */
	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
		MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
			USB_DEVICE_ID_ASUS_T91MT)},
	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
		MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
			USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
		MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
			USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },

	/* Nexio panels */
	{ .driver_data = MT_CLS_DEFAULT,
		MT_USB_DEVICE(USB_VENDOR_ID_NEXIO,
			USB_DEVICE_ID_NEXIO_MULTITOUCH_420)},

	/* Panasonic panels */
	{ .driver_data = MT_CLS_PANASONIC,
		MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
			USB_DEVICE_ID_PANABOARD_UBT780) },
	{ .driver_data = MT_CLS_PANASONIC,
		MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
			USB_DEVICE_ID_PANABOARD_UBT880) },

	/* Novatek Panel */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
			USB_DEVICE_ID_NOVATEK_PCT) },

	/* PenMount panels */
	{ .driver_data = MT_CLS_CONFIDENCE,
		MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
			USB_DEVICE_ID_PENMOUNT_PCI) },

	/* PixArt optical touch screen */
	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
		MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },

	/* PixCir-based panels */
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
		MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
			USB_DEVICE_ID_HANVON_MULTITOUCH) },
	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
		MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },

	/* Quanta-based panels */
	{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
		MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
			USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
	{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
		MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
			USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
	{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
		MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
			USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },

	/* Stantum panels */
	{ .driver_data = MT_CLS_CONFIDENCE,
		MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
			USB_DEVICE_ID_MTP)},
	{ .driver_data = MT_CLS_CONFIDENCE,
		MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
			USB_DEVICE_ID_MTP_STM)},
	{ .driver_data = MT_CLS_DEFAULT,
		MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
			USB_DEVICE_ID_MTP_SITRONIX)},

	/* TopSeed panels */
	{ .driver_data = MT_CLS_TOPSEED,
		MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
			USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },

	/* Touch International panels */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
			USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },

	/* Unitec panels */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
			USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
			USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
	/* XAT */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XAT,
			USB_DEVICE_ID_XAT_CSR) },

	/* Xiroku */
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_SPX) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_MPX) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_CSR) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_SPX1) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_MPX1) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_CSR1) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_SPX2) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_MPX2) },
	{ .driver_data = MT_CLS_NSMU,
		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
			USB_DEVICE_ID_XIROKU_CSR2) },

	/* Zytronic panels */
	{ .driver_data = MT_CLS_SERIAL,
		MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
			USB_DEVICE_ID_ZYTRONIC_ZXY100) },

	/* Generic MT device */
	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },

	/* Generic Win 8 certified MT device */
	{  .driver_data = MT_CLS_WIN_8,
		HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
			HID_ANY_ID, HID_ANY_ID) },
	{ }
};
MODULE_DEVICE_TABLE(hid, mt_devices);

static const struct hid_usage_id mt_grabbed_usages[] = {
	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
};

static struct hid_driver mt_driver = {
	.name = "hid-multitouch",
	.id_table = mt_devices,
	.probe = mt_probe,
	.remove = mt_remove,
	.input_mapping = mt_input_mapping,
	.input_mapped = mt_input_mapped,
	.input_configured = mt_input_configured,
	.feature_mapping = mt_feature_mapping,
	.usage_table = mt_grabbed_usages,
	.event = mt_event,
	.report = mt_report,
#ifdef CONFIG_PM
	.reset_resume = mt_reset_resume,
	.resume = mt_resume,
#endif
};
module_hid_driver(mt_driver);