summaryrefslogtreecommitdiff
path: root/drivers/input/touchscreen/atmel_mxt_ts.c
blob: 7a9197a19f679562678e423c33fe4fe90711fd9f (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
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
/*
 * Atmel maXTouch Touchscreen driver
 *
 * Copyright (C) 2010 Samsung Electronics Co.Ltd
 * Copyright (C) 2012 Google, Inc.
 *
 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
 *
 * 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.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/i2c/atmel_mxt_ts.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/slab.h>

/* Version */
#define MXT_VER_20		20
#define MXT_VER_21		21
#define MXT_VER_22		22

/* Firmware */
#define MXT_FW_NAME		"maxtouch.fw"

/* Registers */
#define MXT_INFO		0x00
#define MXT_FAMILY_ID		0x00
#define MXT_VARIANT_ID		0x01
#define MXT_VERSION		0x02
#define MXT_BUILD		0x03
#define MXT_MATRIX_X_SIZE	0x04
#define MXT_MATRIX_Y_SIZE	0x05
#define MXT_OBJECT_NUM		0x06
#define MXT_OBJECT_START	0x07

#define MXT_OBJECT_SIZE		6

/* Object types */
#define MXT_DEBUG_DIAGNOSTIC_T37	37
#define MXT_GEN_MESSAGE_T5		5
#define MXT_GEN_COMMAND_T6		6
#define MXT_GEN_POWER_T7		7
#define MXT_GEN_ACQUIRE_T8		8
#define MXT_GEN_DATASOURCE_T53		53
#define MXT_TOUCH_MULTI_T9		9
#define MXT_TOUCH_KEYARRAY_T15		15
#define MXT_TOUCH_PROXIMITY_T23		23
#define MXT_TOUCH_PROXKEY_T52		52
#define MXT_PROCI_GRIPFACE_T20		20
#define MXT_PROCG_NOISE_T22		22
#define MXT_PROCI_ONETOUCH_T24		24
#define MXT_PROCI_TWOTOUCH_T27		27
#define MXT_PROCI_GRIP_T40		40
#define MXT_PROCI_PALM_T41		41
#define MXT_PROCI_TOUCHSUPPRESSION_T42	42
#define MXT_PROCI_STYLUS_T47		47
#define MXT_PROCG_NOISESUPPRESSION_T48	48
#define MXT_SPT_COMMSCONFIG_T18		18
#define MXT_SPT_GPIOPWM_T19		19
#define MXT_SPT_SELFTEST_T25		25
#define MXT_SPT_CTECONFIG_T28		28
#define MXT_SPT_USERDATA_T38		38
#define MXT_SPT_DIGITIZER_T43		43
#define MXT_SPT_MESSAGECOUNT_T44	44
#define MXT_SPT_CTECONFIG_T46		46

/* MXT_GEN_COMMAND_T6 field */
#define MXT_COMMAND_RESET	0
#define MXT_COMMAND_BACKUPNV	1
#define MXT_COMMAND_CALIBRATE	2
#define MXT_COMMAND_REPORTALL	3
#define MXT_COMMAND_DIAGNOSTIC	5

/* Define for T6 status byte */
#define MXT_T6_STATUS_RESET	(1 << 7)

/* MXT_GEN_POWER_T7 field */
#define MXT_POWER_IDLEACQINT	0
#define MXT_POWER_ACTVACQINT	1
#define MXT_POWER_ACTV2IDLETO	2

/* MXT_GEN_ACQUIRE_T8 field */
#define MXT_ACQUIRE_CHRGTIME	0
#define MXT_ACQUIRE_TCHDRIFT	2
#define MXT_ACQUIRE_DRIFTST	3
#define MXT_ACQUIRE_TCHAUTOCAL	4
#define MXT_ACQUIRE_SYNC	5
#define MXT_ACQUIRE_ATCHCALST	6
#define MXT_ACQUIRE_ATCHCALSTHR	7

/* MXT_TOUCH_MULTI_T9 field */
#define MXT_TOUCH_CTRL		0
#define MXT_TOUCH_XORIGIN	1
#define MXT_TOUCH_YORIGIN	2
#define MXT_TOUCH_XSIZE		3
#define MXT_TOUCH_YSIZE		4
#define MXT_TOUCH_BLEN		6
#define MXT_TOUCH_TCHTHR	7
#define MXT_TOUCH_TCHDI		8
#define MXT_TOUCH_ORIENT	9
#define MXT_TOUCH_MOVHYSTI	11
#define MXT_TOUCH_MOVHYSTN	12
#define MXT_TOUCH_NUMTOUCH	14
#define MXT_TOUCH_MRGHYST	15
#define MXT_TOUCH_MRGTHR	16
#define MXT_TOUCH_AMPHYST	17
#define MXT_TOUCH_XRANGE_LSB	18
#define MXT_TOUCH_XRANGE_MSB	19
#define MXT_TOUCH_YRANGE_LSB	20
#define MXT_TOUCH_YRANGE_MSB	21
#define MXT_TOUCH_XLOCLIP	22
#define MXT_TOUCH_XHICLIP	23
#define MXT_TOUCH_YLOCLIP	24
#define MXT_TOUCH_YHICLIP	25
#define MXT_TOUCH_XEDGECTRL	26
#define MXT_TOUCH_XEDGEDIST	27
#define MXT_TOUCH_YEDGECTRL	28
#define MXT_TOUCH_YEDGEDIST	29
#define MXT_TOUCH_JUMPLIMIT	30

/* MXT_PROCI_GRIPFACE_T20 field */
#define MXT_GRIPFACE_CTRL	0
#define MXT_GRIPFACE_XLOGRIP	1
#define MXT_GRIPFACE_XHIGRIP	2
#define MXT_GRIPFACE_YLOGRIP	3
#define MXT_GRIPFACE_YHIGRIP	4
#define MXT_GRIPFACE_MAXTCHS	5
#define MXT_GRIPFACE_SZTHR1	7
#define MXT_GRIPFACE_SZTHR2	8
#define MXT_GRIPFACE_SHPTHR1	9
#define MXT_GRIPFACE_SHPTHR2	10
#define MXT_GRIPFACE_SUPEXTTO	11

/* MXT_PROCI_NOISE field */
#define MXT_NOISE_CTRL		0
#define MXT_NOISE_OUTFLEN	1
#define MXT_NOISE_GCAFUL_LSB	3
#define MXT_NOISE_GCAFUL_MSB	4
#define MXT_NOISE_GCAFLL_LSB	5
#define MXT_NOISE_GCAFLL_MSB	6
#define MXT_NOISE_ACTVGCAFVALID	7
#define MXT_NOISE_NOISETHR	8
#define MXT_NOISE_FREQHOPSCALE	10
#define MXT_NOISE_FREQ0		11
#define MXT_NOISE_FREQ1		12
#define MXT_NOISE_FREQ2		13
#define MXT_NOISE_FREQ3		14
#define MXT_NOISE_FREQ4		15
#define MXT_NOISE_IDLEGCAFVALID	16

/* MXT_SPT_COMMSCONFIG_T18 */
#define MXT_COMMS_CTRL		0
#define MXT_COMMS_CMD		1

/* MXT_SPT_CTECONFIG_T28 field */
#define MXT_CTE_CTRL		0
#define MXT_CTE_CMD		1
#define MXT_CTE_MODE		2
#define MXT_CTE_IDLEGCAFDEPTH	3
#define MXT_CTE_ACTVGCAFDEPTH	4
#define MXT_CTE_VOLTAGE		5

#define MXT_VOLTAGE_DEFAULT	2700000
#define MXT_VOLTAGE_STEP	10000

/* Define for MXT_GEN_COMMAND_T6 */
#define MXT_BOOT_VALUE		0xa5
#define MXT_RESET_VALUE		0x01
#define MXT_BACKUP_VALUE	0x55

/* Delay times */
#define MXT_BACKUP_TIME		50	/* msec */
#define MXT_RESET_TIME		200	/* msec */
#define MXT_RESET_TIMEOUT	3000	/* msec */
#define MXT_CRC_TIMEOUT		1000	/* msec */
#define MXT_FW_RESET_TIME	3000	/* msec */
#define MXT_FW_CHG_TIMEOUT	300	/* msec */

/* Command to unlock bootloader */
#define MXT_UNLOCK_CMD_MSB	0xaa
#define MXT_UNLOCK_CMD_LSB	0xdc

/* Bootloader mode status */
#define MXT_WAITING_BOOTLOAD_CMD	0xc0	/* valid 7 6 bit only */
#define MXT_WAITING_FRAME_DATA	0x80	/* valid 7 6 bit only */
#define MXT_FRAME_CRC_CHECK	0x02
#define MXT_FRAME_CRC_FAIL	0x03
#define MXT_FRAME_CRC_PASS	0x04
#define MXT_APP_CRC_FAIL	0x40	/* valid 7 8 bit only */
#define MXT_BOOT_STATUS_MASK	0x3f
#define MXT_BOOT_EXTENDED_ID	(1 << 5)
#define MXT_BOOT_ID_MASK	0x1f

/* Touch status */
#define MXT_UNGRIP		(1 << 0)
#define MXT_SUPPRESS		(1 << 1)
#define MXT_AMP			(1 << 2)
#define MXT_VECTOR		(1 << 3)
#define MXT_MOVE		(1 << 4)
#define MXT_RELEASE		(1 << 5)
#define MXT_PRESS		(1 << 6)
#define MXT_DETECT		(1 << 7)

/* Touch orient bits */
#define MXT_XY_SWITCH		(1 << 0)
#define MXT_X_INVERT		(1 << 1)
#define MXT_Y_INVERT		(1 << 2)

/* Touchscreen absolute values */
#define MXT_MAX_AREA		0xff

#define MXT_PIXELS_PER_MM	20

struct mxt_info {
	u8 family_id;
	u8 variant_id;
	u8 version;
	u8 build;
	u8 matrix_xsize;
	u8 matrix_ysize;
	u8 object_num;
};

struct mxt_object {
	u8 type;
	u16 start_address;
	u8 size_minus_one;
	u8 instances_minus_one;
	u8 num_report_ids;
} __packed;

struct mxt_message {
	u8 reportid;
	u8 message[7];
};

/* Each client has this additional data */
struct mxt_data {
	struct i2c_client *client;
	struct input_dev *input_dev;
	char phys[64];		/* device physical location */
	const struct mxt_platform_data *pdata;
	struct mxt_object *object_table;
	struct mxt_info info;
	unsigned int irq;
	unsigned int max_x;
	unsigned int max_y;
	bool in_bootloader;
	u32 config_crc;
	u8 bootloader_addr;

	/* Cached parameters from object table */
	u8 T6_reportid;
	u16 T6_address;
	u8 T9_reportid_min;
	u8 T9_reportid_max;
	u8 T19_reportid;

	/* for fw update in bootloader */
	struct completion bl_completion;

	/* for reset handling */
	struct completion reset_completion;

	/* for config update handling */
	struct completion crc_completion;
};

static size_t mxt_obj_size(const struct mxt_object *obj)
{
	return obj->size_minus_one + 1;
}

static size_t mxt_obj_instances(const struct mxt_object *obj)
{
	return obj->instances_minus_one + 1;
}

static bool mxt_object_readable(unsigned int type)
{
	switch (type) {
	case MXT_GEN_COMMAND_T6:
	case MXT_GEN_POWER_T7:
	case MXT_GEN_ACQUIRE_T8:
	case MXT_GEN_DATASOURCE_T53:
	case MXT_TOUCH_MULTI_T9:
	case MXT_TOUCH_KEYARRAY_T15:
	case MXT_TOUCH_PROXIMITY_T23:
	case MXT_TOUCH_PROXKEY_T52:
	case MXT_PROCI_GRIPFACE_T20:
	case MXT_PROCG_NOISE_T22:
	case MXT_PROCI_ONETOUCH_T24:
	case MXT_PROCI_TWOTOUCH_T27:
	case MXT_PROCI_GRIP_T40:
	case MXT_PROCI_PALM_T41:
	case MXT_PROCI_TOUCHSUPPRESSION_T42:
	case MXT_PROCI_STYLUS_T47:
	case MXT_PROCG_NOISESUPPRESSION_T48:
	case MXT_SPT_COMMSCONFIG_T18:
	case MXT_SPT_GPIOPWM_T19:
	case MXT_SPT_SELFTEST_T25:
	case MXT_SPT_CTECONFIG_T28:
	case MXT_SPT_USERDATA_T38:
	case MXT_SPT_DIGITIZER_T43:
	case MXT_SPT_CTECONFIG_T46:
		return true;
	default:
		return false;
	}
}

static bool mxt_object_writable(unsigned int type)
{
	switch (type) {
	case MXT_GEN_COMMAND_T6:
	case MXT_GEN_POWER_T7:
	case MXT_GEN_ACQUIRE_T8:
	case MXT_TOUCH_MULTI_T9:
	case MXT_TOUCH_KEYARRAY_T15:
	case MXT_TOUCH_PROXIMITY_T23:
	case MXT_TOUCH_PROXKEY_T52:
	case MXT_PROCI_GRIPFACE_T20:
	case MXT_PROCG_NOISE_T22:
	case MXT_PROCI_ONETOUCH_T24:
	case MXT_PROCI_TWOTOUCH_T27:
	case MXT_PROCI_GRIP_T40:
	case MXT_PROCI_PALM_T41:
	case MXT_PROCI_TOUCHSUPPRESSION_T42:
	case MXT_PROCI_STYLUS_T47:
	case MXT_PROCG_NOISESUPPRESSION_T48:
	case MXT_SPT_COMMSCONFIG_T18:
	case MXT_SPT_GPIOPWM_T19:
	case MXT_SPT_SELFTEST_T25:
	case MXT_SPT_CTECONFIG_T28:
	case MXT_SPT_DIGITIZER_T43:
	case MXT_SPT_CTECONFIG_T46:
		return true;
	default:
		return false;
	}
}

static void mxt_dump_message(struct device *dev,
			     struct mxt_message *message)
{
	dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
		message->reportid, 7, message->message);
}

static int mxt_wait_for_completion(struct mxt_data *data,
				   struct completion *comp,
				   unsigned int timeout_ms)
{
	struct device *dev = &data->client->dev;
	unsigned long timeout = msecs_to_jiffies(timeout_ms);
	long ret;

	ret = wait_for_completion_interruptible_timeout(comp, timeout);
	if (ret < 0) {
		return ret;
	} else if (ret == 0) {
		dev_err(dev, "Wait for completion timed out.\n");
		return -ETIMEDOUT;
	}
	return 0;
}

static int mxt_bootloader_read(struct mxt_data *data,
			       u8 *val, unsigned int count)
{
	int ret;
	struct i2c_msg msg;

	msg.addr = data->bootloader_addr;
	msg.flags = data->client->flags & I2C_M_TEN;
	msg.flags |= I2C_M_RD;
	msg.len = count;
	msg.buf = val;

	ret = i2c_transfer(data->client->adapter, &msg, 1);

	if (ret == 1) {
		ret = 0;
	} else {
		ret = ret < 0 ? ret : -EIO;
		dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
			__func__, ret);
	}

	return ret;
}

static int mxt_bootloader_write(struct mxt_data *data,
				const u8 * const val, unsigned int count)
{
	int ret;
	struct i2c_msg msg;

	msg.addr = data->bootloader_addr;
	msg.flags = data->client->flags & I2C_M_TEN;
	msg.len = count;
	msg.buf = (u8 *)val;

	ret = i2c_transfer(data->client->adapter, &msg, 1);
	if (ret == 1) {
		ret = 0;
	} else {
		ret = ret < 0 ? ret : -EIO;
		dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
			__func__, ret);
	}

	return ret;
}

static int mxt_lookup_bootloader_address(struct mxt_data *data)
{
	u8 appmode = data->client->addr;
	u8 bootloader;

	switch (appmode) {
	case 0x4a:
	case 0x4b:
	case 0x4c:
	case 0x4d:
	case 0x5a:
	case 0x5b:
		bootloader = appmode - 0x26;
		break;
	default:
		dev_err(&data->client->dev,
			"Appmode i2c address 0x%02x not found\n",
			appmode);
		return -EINVAL;
	}

	data->bootloader_addr = bootloader;
	return 0;
}

static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
{
	struct device *dev = &data->client->dev;
	u8 buf[3];

	if (val & MXT_BOOT_EXTENDED_ID) {
		if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
			dev_err(dev, "%s: i2c failure\n", __func__);
			return -EIO;
		}

		dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);

		return buf[0];
	} else {
		dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);

		return val;
	}
}

static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
{
	struct device *dev = &data->client->dev;
	u8 val;
	int ret;

recheck:
	if (state != MXT_WAITING_BOOTLOAD_CMD) {
		/*
		 * In application update mode, the interrupt
		 * line signals state transitions. We must wait for the
		 * CHG assertion before reading the status byte.
		 * Once the status byte has been read, the line is deasserted.
		 */
		ret = mxt_wait_for_completion(data, &data->bl_completion,
					      MXT_FW_CHG_TIMEOUT);
		if (ret) {
			/*
			 * TODO: handle -ERESTARTSYS better by terminating
			 * fw update process before returning to userspace
			 * by writing length 0x000 to device (iff we are in
			 * WAITING_FRAME_DATA state).
			 */
			dev_err(dev, "Update wait error %d\n", ret);
			return ret;
		}
	}

	ret = mxt_bootloader_read(data, &val, 1);
	if (ret)
		return ret;

	if (state == MXT_WAITING_BOOTLOAD_CMD)
		val = mxt_get_bootloader_version(data, val);

	switch (state) {
	case MXT_WAITING_BOOTLOAD_CMD:
	case MXT_WAITING_FRAME_DATA:
		val &= ~MXT_BOOT_STATUS_MASK;
		break;
	case MXT_FRAME_CRC_PASS:
		if (val == MXT_FRAME_CRC_CHECK) {
			goto recheck;
		} else if (val == MXT_FRAME_CRC_FAIL) {
			dev_err(dev, "Bootloader CRC fail\n");
			return -EINVAL;
		}
		break;
	default:
		return -EINVAL;
	}

	if (val != state) {
		dev_err(dev, "Invalid bootloader state %02X != %02X\n",
			val, state);
		return -EINVAL;
	}

	return 0;
}

static int mxt_unlock_bootloader(struct mxt_data *data)
{
	int ret;
	u8 buf[2];

	buf[0] = MXT_UNLOCK_CMD_LSB;
	buf[1] = MXT_UNLOCK_CMD_MSB;

	ret = mxt_bootloader_write(data, buf, 2);
	if (ret)
		return ret;

	return 0;
}

static int __mxt_read_reg(struct i2c_client *client,
			       u16 reg, u16 len, void *val)
{
	struct i2c_msg xfer[2];
	u8 buf[2];
	int ret;

	buf[0] = reg & 0xff;
	buf[1] = (reg >> 8) & 0xff;

	/* Write register */
	xfer[0].addr = client->addr;
	xfer[0].flags = 0;
	xfer[0].len = 2;
	xfer[0].buf = buf;

	/* Read data */
	xfer[1].addr = client->addr;
	xfer[1].flags = I2C_M_RD;
	xfer[1].len = len;
	xfer[1].buf = val;

	ret = i2c_transfer(client->adapter, xfer, 2);
	if (ret == 2) {
		ret = 0;
	} else {
		if (ret >= 0)
			ret = -EIO;
		dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
			__func__, ret);
	}

	return ret;
}

static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
{
	return __mxt_read_reg(client, reg, 1, val);
}

static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
			   const void *val)
{
	u8 *buf;
	size_t count;
	int ret;

	count = len + 2;
	buf = kmalloc(count, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = reg & 0xff;
	buf[1] = (reg >> 8) & 0xff;
	memcpy(&buf[2], val, len);

	ret = i2c_master_send(client, buf, count);
	if (ret == count) {
		ret = 0;
	} else {
		if (ret >= 0)
			ret = -EIO;
		dev_err(&client->dev, "%s: i2c send failed (%d)\n",
			__func__, ret);
	}

	kfree(buf);
	return ret;
}

static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
{
	return __mxt_write_reg(client, reg, 1, &val);
}

static struct mxt_object *
mxt_get_object(struct mxt_data *data, u8 type)
{
	struct mxt_object *object;
	int i;

	for (i = 0; i < data->info.object_num; i++) {
		object = data->object_table + i;
		if (object->type == type)
			return object;
	}

	dev_err(&data->client->dev, "Invalid object type T%u\n", type);
	return NULL;
}

static int mxt_read_message(struct mxt_data *data,
				 struct mxt_message *message)
{
	struct mxt_object *object;
	u16 reg;

	object = mxt_get_object(data, MXT_GEN_MESSAGE_T5);
	if (!object)
		return -EINVAL;

	reg = object->start_address;
	return __mxt_read_reg(data->client, reg,
			sizeof(struct mxt_message), message);
}

static int mxt_write_object(struct mxt_data *data,
				 u8 type, u8 offset, u8 val)
{
	struct mxt_object *object;
	u16 reg;

	object = mxt_get_object(data, type);
	if (!object || offset >= mxt_obj_size(object))
		return -EINVAL;

	reg = object->start_address;
	return mxt_write_reg(data->client, reg + offset, val);
}

static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
{
	struct input_dev *input = data->input_dev;
	const struct mxt_platform_data *pdata = data->pdata;
	bool button;
	int i;

	/* Active-low switch */
	for (i = 0; i < pdata->t19_num_keys; i++) {
		if (pdata->t19_keymap[i] == KEY_RESERVED)
			continue;
		button = !(message->message[0] & (1 << i));
		input_report_key(input, pdata->t19_keymap[i], button);
	}
}

static void mxt_input_touchevent(struct mxt_data *data,
				      struct mxt_message *message, int id)
{
	struct device *dev = &data->client->dev;
	u8 status = message->message[0];
	struct input_dev *input_dev = data->input_dev;
	int x;
	int y;
	int area;
	int pressure;

	x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
	y = (message->message[2] << 4) | ((message->message[3] & 0xf));
	if (data->max_x < 1024)
		x = x >> 2;
	if (data->max_y < 1024)
		y = y >> 2;

	area = message->message[4];
	pressure = message->message[5];

	dev_dbg(dev,
		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
		id,
		(status & MXT_DETECT) ? 'D' : '.',
		(status & MXT_PRESS) ? 'P' : '.',
		(status & MXT_RELEASE) ? 'R' : '.',
		(status & MXT_MOVE) ? 'M' : '.',
		(status & MXT_VECTOR) ? 'V' : '.',
		(status & MXT_AMP) ? 'A' : '.',
		(status & MXT_SUPPRESS) ? 'S' : '.',
		(status & MXT_UNGRIP) ? 'U' : '.',
		x, y, area, pressure);

	input_mt_slot(input_dev, id);
	input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
				   status & MXT_DETECT);

	if (status & MXT_DETECT) {
		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
		input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
	}
}

static u16 mxt_extract_T6_csum(const u8 *csum)
{
	return csum[0] | (csum[1] << 8) | (csum[2] << 16);
}

static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
{
	u8 id = msg->reportid;
	return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
}

static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
{
	struct mxt_message message;
	const u8 *payload = &message.message[0];
	struct device *dev = &data->client->dev;
	u8 reportid;
	bool update_input = false;
	u32 crc;

	do {
		if (mxt_read_message(data, &message)) {
			dev_err(dev, "Failed to read message\n");
			return IRQ_NONE;
		}

		reportid = message.reportid;

		if (reportid == data->T6_reportid) {
			u8 status = payload[0];

			crc = mxt_extract_T6_csum(&payload[1]);
			if (crc != data->config_crc) {
				data->config_crc = crc;
				complete(&data->crc_completion);
			}

			dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
				status, data->config_crc);

			if (status & MXT_T6_STATUS_RESET)
				complete(&data->reset_completion);
		} else if (mxt_is_T9_message(data, &message)) {
			int id = reportid - data->T9_reportid_min;
			mxt_input_touchevent(data, &message, id);
			update_input = true;
		} else if (message.reportid == data->T19_reportid) {
			mxt_input_button(data, &message);
			update_input = true;
		} else {
			mxt_dump_message(dev, &message);
		}
	} while (reportid != 0xff);

	if (update_input) {
		input_mt_report_pointer_emulation(data->input_dev, false);
		input_sync(data->input_dev);
	}

	return IRQ_HANDLED;
}

static irqreturn_t mxt_interrupt(int irq, void *dev_id)
{
	struct mxt_data *data = dev_id;

	if (data->in_bootloader) {
		/* bootloader state transition completion */
		complete(&data->bl_completion);
		return IRQ_HANDLED;
	}

	return mxt_process_messages_until_invalid(data);
}

static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
			  u8 value, bool wait)
{
	u16 reg;
	u8 command_register;
	int timeout_counter = 0;
	int ret;

	reg = data->T6_address + cmd_offset;

	ret = mxt_write_reg(data->client, reg, value);
	if (ret)
		return ret;

	if (!wait)
		return 0;

	do {
		msleep(20);
		ret = __mxt_read_reg(data->client, reg, 1, &command_register);
		if (ret)
			return ret;
	} while (command_register != 0 && timeout_counter++ <= 100);

	if (timeout_counter > 100) {
		dev_err(&data->client->dev, "Command failed!\n");
		return -EIO;
	}

	return 0;
}

static int mxt_soft_reset(struct mxt_data *data)
{
	struct device *dev = &data->client->dev;
	int ret = 0;

	dev_info(dev, "Resetting chip\n");

	reinit_completion(&data->reset_completion);

	ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
	if (ret)
		return ret;

	ret = mxt_wait_for_completion(data, &data->reset_completion,
				      MXT_RESET_TIMEOUT);
	if (ret)
		return ret;

	return 0;
}

static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
{
	/*
	 * On failure, CRC is set to 0 and config will always be
	 * downloaded.
	 */
	data->config_crc = 0;
	reinit_completion(&data->crc_completion);

	mxt_t6_command(data, cmd, value, true);

	/*
	 * Wait for crc message. On failure, CRC is set to 0 and config will
	 * always be downloaded.
	 */
	mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
}

static int mxt_check_reg_init(struct mxt_data *data)
{
	const struct mxt_platform_data *pdata = data->pdata;
	struct mxt_object *object;
	struct device *dev = &data->client->dev;
	int index = 0;
	int i, size;
	int ret;

	if (!pdata->config) {
		dev_dbg(dev, "No cfg data defined, skipping reg init\n");
		return 0;
	}

	mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);

	if (data->config_crc == pdata->config_crc) {
		dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc);
		return 0;
	}

	dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n",
		 data->config_crc, pdata->config_crc);

	for (i = 0; i < data->info.object_num; i++) {
		object = data->object_table + i;

		if (!mxt_object_writable(object->type))
			continue;

		size = mxt_obj_size(object) * mxt_obj_instances(object);
		if (index + size > pdata->config_length) {
			dev_err(dev, "Not enough config data!\n");
			return -EINVAL;
		}

		ret = __mxt_write_reg(data->client, object->start_address,
				size, &pdata->config[index]);
		if (ret)
			return ret;
		index += size;
	}

	mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);

	ret = mxt_soft_reset(data);
	if (ret)
		return ret;

	dev_info(dev, "Config successfully updated\n");

	return 0;
}

static int mxt_make_highchg(struct mxt_data *data)
{
	struct device *dev = &data->client->dev;
	struct mxt_message message;
	int count = 10;
	int error;

	/* Read dummy message to make high CHG pin */
	do {
		error = mxt_read_message(data, &message);
		if (error)
			return error;
	} while (message.reportid != 0xff && --count);

	if (!count) {
		dev_err(dev, "CHG pin isn't cleared\n");
		return -EBUSY;
	}

	return 0;
}

static int mxt_get_info(struct mxt_data *data)
{
	struct i2c_client *client = data->client;
	struct mxt_info *info = &data->info;
	int error;

	/* Read 7-byte info block starting at address 0 */
	error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
	if (error)
		return error;

	return 0;
}

static int mxt_get_object_table(struct mxt_data *data)
{
	struct i2c_client *client = data->client;
	size_t table_size;
	int error;
	int i;
	u8 reportid;

	table_size = data->info.object_num * sizeof(struct mxt_object);
	error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
			data->object_table);
	if (error)
		return error;

	/* Valid Report IDs start counting from 1 */
	reportid = 1;
	for (i = 0; i < data->info.object_num; i++) {
		struct mxt_object *object = data->object_table + i;
		u8 min_id, max_id;

		le16_to_cpus(&object->start_address);

		if (object->num_report_ids) {
			min_id = reportid;
			reportid += object->num_report_ids *
					mxt_obj_instances(object);
			max_id = reportid - 1;
		} else {
			min_id = 0;
			max_id = 0;
		}

		dev_dbg(&data->client->dev,
			"T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
			object->type, object->start_address,
			mxt_obj_size(object), mxt_obj_instances(object),
			min_id, max_id);

		switch (object->type) {
		case MXT_GEN_COMMAND_T6:
			data->T6_reportid = min_id;
			data->T6_address = object->start_address;
			break;
		case MXT_TOUCH_MULTI_T9:
			data->T9_reportid_min = min_id;
			data->T9_reportid_max = max_id;
			break;
		case MXT_SPT_GPIOPWM_T19:
			data->T19_reportid = min_id;
			break;
		}
	}

	return 0;
}

static void mxt_free_object_table(struct mxt_data *data)
{
	kfree(data->object_table);
	data->object_table = NULL;
	data->T6_reportid = 0;
	data->T9_reportid_min = 0;
	data->T9_reportid_max = 0;
	data->T19_reportid = 0;
}

static int mxt_initialize(struct mxt_data *data)
{
	struct i2c_client *client = data->client;
	struct mxt_info *info = &data->info;
	int error;
	u8 val;

	error = mxt_get_info(data);
	if (error)
		return error;

	data->object_table = kcalloc(info->object_num,
				     sizeof(struct mxt_object),
				     GFP_KERNEL);
	if (!data->object_table) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		return -ENOMEM;
	}

	/* Get object table information */
	error = mxt_get_object_table(data);
	if (error) {
		dev_err(&client->dev, "Error %d reading object table\n", error);
		goto err_free_object_table;
	}

	/* Check register init values */
	error = mxt_check_reg_init(data);
	if (error) {
		dev_err(&client->dev, "Error %d initializing configuration\n",
			error);
		goto err_free_object_table;
	}

	/* Update matrix size at info struct */
	error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
	if (error)
		goto err_free_object_table;
	info->matrix_xsize = val;

	error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
	if (error)
		goto err_free_object_table;
	info->matrix_ysize = val;

	dev_info(&client->dev,
			"Family: %u Variant: %u Firmware V%u.%u.%02X\n",
			info->family_id, info->variant_id, info->version >> 4,
			info->version & 0xf, info->build);

	dev_info(&client->dev,
			"Matrix X Size: %u Matrix Y Size: %u Objects: %u\n",
			info->matrix_xsize, info->matrix_ysize,
			info->object_num);

	return 0;

err_free_object_table:
	mxt_free_object_table(data);
	return error;
}

static void mxt_calc_resolution(struct mxt_data *data)
{
	unsigned int max_x = data->pdata->x_size - 1;
	unsigned int max_y = data->pdata->y_size - 1;

	if (data->pdata->orient & MXT_XY_SWITCH) {
		data->max_x = max_y;
		data->max_y = max_x;
	} else {
		data->max_x = max_x;
		data->max_y = max_y;
	}
}

/* Firmware Version is returned as Major.Minor.Build */
static ssize_t mxt_fw_version_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct mxt_data *data = dev_get_drvdata(dev);
	struct mxt_info *info = &data->info;
	return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
			 info->version >> 4, info->version & 0xf, info->build);
}

/* Hardware Version is returned as FamilyID.VariantID */
static ssize_t mxt_hw_version_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct mxt_data *data = dev_get_drvdata(dev);
	struct mxt_info *info = &data->info;
	return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
			 info->family_id, info->variant_id);
}

static ssize_t mxt_show_instance(char *buf, int count,
				 struct mxt_object *object, int instance,
				 const u8 *val)
{
	int i;

	if (mxt_obj_instances(object) > 1)
		count += scnprintf(buf + count, PAGE_SIZE - count,
				   "Instance %u\n", instance);

	for (i = 0; i < mxt_obj_size(object); i++)
		count += scnprintf(buf + count, PAGE_SIZE - count,
				"\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
	count += scnprintf(buf + count, PAGE_SIZE - count, "\n");

	return count;
}

static ssize_t mxt_object_show(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	struct mxt_data *data = dev_get_drvdata(dev);
	struct mxt_object *object;
	int count = 0;
	int i, j;
	int error;
	u8 *obuf;

	/* Pre-allocate buffer large enough to hold max sized object. */
	obuf = kmalloc(256, GFP_KERNEL);
	if (!obuf)
		return -ENOMEM;

	error = 0;
	for (i = 0; i < data->info.object_num; i++) {
		object = data->object_table + i;

		if (!mxt_object_readable(object->type))
			continue;

		count += scnprintf(buf + count, PAGE_SIZE - count,
				"T%u:\n", object->type);

		for (j = 0; j < mxt_obj_instances(object); j++) {
			u16 size = mxt_obj_size(object);
			u16 addr = object->start_address + j * size;

			error = __mxt_read_reg(data->client, addr, size, obuf);
			if (error)
				goto done;

			count = mxt_show_instance(buf, count, object, j, obuf);
		}
	}

done:
	kfree(obuf);
	return error ?: count;
}

static int mxt_check_firmware_format(struct device *dev,
				     const struct firmware *fw)
{
	unsigned int pos = 0;
	char c;

	while (pos < fw->size) {
		c = *(fw->data + pos);

		if (c < '0' || (c > '9' && c < 'A') || c > 'F')
			return 0;

		pos++;
	}

	/*
	 * To convert file try:
	 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
	 */
	dev_err(dev, "Aborting: firmware file must be in binary format\n");

	return -EINVAL;
}

static int mxt_load_fw(struct device *dev, const char *fn)
{
	struct mxt_data *data = dev_get_drvdata(dev);
	const struct firmware *fw = NULL;
	unsigned int frame_size;
	unsigned int pos = 0;
	unsigned int retry = 0;
	unsigned int frame = 0;
	int ret;

	ret = request_firmware(&fw, fn, dev);
	if (ret) {
		dev_err(dev, "Unable to open firmware %s\n", fn);
		return ret;
	}

	/* Check for incorrect enc file */
	ret = mxt_check_firmware_format(dev, fw);
	if (ret)
		goto release_firmware;

	ret = mxt_lookup_bootloader_address(data);
	if (ret)
		goto release_firmware;

	/* Change to the bootloader mode */
	data->in_bootloader = true;

	ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false);
	if (ret)
		goto release_firmware;

	msleep(MXT_RESET_TIME);

	reinit_completion(&data->bl_completion);

	ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
	if (ret)
		goto disable_irq;

	/* Unlock bootloader */
	mxt_unlock_bootloader(data);

	while (pos < fw->size) {
		ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
		if (ret)
			goto disable_irq;

		frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));

		/* Take account of CRC bytes */
		frame_size += 2;

		/* Write one frame to device */
		ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
		if (ret)
			goto disable_irq;

		ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
		if (ret) {
			retry++;

			/* Back off by 20ms per retry */
			msleep(retry * 20);

			if (retry > 20) {
				dev_err(dev, "Retry count exceeded\n");
				goto disable_irq;
			}
		} else {
			retry = 0;
			pos += frame_size;
			frame++;
		}

		if (frame % 50 == 0)
			dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
				frame, pos, fw->size);
	}

	/* Wait for flash. */
	ret = mxt_wait_for_completion(data, &data->bl_completion,
				      MXT_FW_RESET_TIME);
	if (ret)
		goto disable_irq;

	dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);

	/*
	 * Wait for device to reset. Some bootloader versions do not assert
	 * the CHG line after bootloading has finished, so ignore potential
	 * errors.
	 */
	mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);

	data->in_bootloader = false;

disable_irq:
	disable_irq(data->irq);
release_firmware:
	release_firmware(fw);
	return ret;
}

static ssize_t mxt_update_fw_store(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t count)
{
	struct mxt_data *data = dev_get_drvdata(dev);
	int error;

	error = mxt_load_fw(dev, MXT_FW_NAME);
	if (error) {
		dev_err(dev, "The firmware update failed(%d)\n", error);
		count = error;
	} else {
		dev_info(dev, "The firmware update succeeded\n");

		mxt_free_object_table(data);

		mxt_initialize(data);

		enable_irq(data->irq);

		error = mxt_make_highchg(data);
		if (error)
			return error;
	}

	return count;
}

static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);

static struct attribute *mxt_attrs[] = {
	&dev_attr_fw_version.attr,
	&dev_attr_hw_version.attr,
	&dev_attr_object.attr,
	&dev_attr_update_fw.attr,
	NULL
};

static const struct attribute_group mxt_attr_group = {
	.attrs = mxt_attrs,
};

static void mxt_start(struct mxt_data *data)
{
	/* Touch enable */
	mxt_write_object(data,
			MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83);
}

static void mxt_stop(struct mxt_data *data)
{
	/* Touch disable */
	mxt_write_object(data,
			MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0);
}

static int mxt_input_open(struct input_dev *dev)
{
	struct mxt_data *data = input_get_drvdata(dev);

	mxt_start(data);

	return 0;
}

static void mxt_input_close(struct input_dev *dev)
{
	struct mxt_data *data = input_get_drvdata(dev);

	mxt_stop(data);
}

static int mxt_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev);
	struct mxt_data *data;
	struct input_dev *input_dev;
	int error;
	unsigned int num_mt_slots;
	unsigned int mt_flags = 0;
	int i;

	if (!pdata)
		return -EINVAL;

	data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!data || !input_dev) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		error = -ENOMEM;
		goto err_free_mem;
	}

	input_dev->name = "Atmel maXTouch Touchscreen";
	snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
		 client->adapter->nr, client->addr);

	input_dev->phys = data->phys;

	input_dev->id.bustype = BUS_I2C;
	input_dev->dev.parent = &client->dev;
	input_dev->open = mxt_input_open;
	input_dev->close = mxt_input_close;

	data->client = client;
	data->input_dev = input_dev;
	data->pdata = pdata;
	data->irq = client->irq;

	init_completion(&data->bl_completion);
	init_completion(&data->reset_completion);
	init_completion(&data->crc_completion);

	mxt_calc_resolution(data);

	error = mxt_initialize(data);
	if (error)
		goto err_free_mem;

	__set_bit(EV_ABS, input_dev->evbit);
	__set_bit(EV_KEY, input_dev->evbit);
	__set_bit(BTN_TOUCH, input_dev->keybit);

	if (pdata->t19_num_keys) {
		__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);

		for (i = 0; i < pdata->t19_num_keys; i++)
			if (pdata->t19_keymap[i] != KEY_RESERVED)
				input_set_capability(input_dev, EV_KEY,
						     pdata->t19_keymap[i]);

		mt_flags |= INPUT_MT_POINTER;

		input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
		input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
		input_abs_set_res(input_dev, ABS_MT_POSITION_X,
				  MXT_PIXELS_PER_MM);
		input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
				  MXT_PIXELS_PER_MM);

		input_dev->name = "Atmel maXTouch Touchpad";
	}

	/* For single touch */
	input_set_abs_params(input_dev, ABS_X,
			     0, data->max_x, 0, 0);
	input_set_abs_params(input_dev, ABS_Y,
			     0, data->max_y, 0, 0);
	input_set_abs_params(input_dev, ABS_PRESSURE,
			     0, 255, 0, 0);

	/* For multi touch */
	num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
	error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
	if (error)
		goto err_free_object;
	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
			     0, MXT_MAX_AREA, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
			     0, data->max_x, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
			     0, data->max_y, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_PRESSURE,
			     0, 255, 0, 0);

	input_set_drvdata(input_dev, data);
	i2c_set_clientdata(client, data);

	error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
				     pdata->irqflags | IRQF_ONESHOT,
				     client->name, data);
	if (error) {
		dev_err(&client->dev, "Failed to register interrupt\n");
		goto err_free_object;
	}

	error = mxt_make_highchg(data);
	if (error)
		goto err_free_irq;

	error = input_register_device(input_dev);
	if (error) {
		dev_err(&client->dev, "Error %d registering input device\n",
			error);
		goto err_free_irq;
	}

	error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
	if (error) {
		dev_err(&client->dev, "Failure %d creating sysfs group\n",
			error);
		goto err_unregister_device;
	}

	return 0;

err_unregister_device:
	input_unregister_device(input_dev);
	input_dev = NULL;
err_free_irq:
	free_irq(client->irq, data);
err_free_object:
	kfree(data->object_table);
err_free_mem:
	input_free_device(input_dev);
	kfree(data);
	return error;
}

static int mxt_remove(struct i2c_client *client)
{
	struct mxt_data *data = i2c_get_clientdata(client);

	sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
	free_irq(data->irq, data);
	input_unregister_device(data->input_dev);
	kfree(data->object_table);
	kfree(data);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int mxt_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct mxt_data *data = i2c_get_clientdata(client);
	struct input_dev *input_dev = data->input_dev;

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
		mxt_stop(data);

	mutex_unlock(&input_dev->mutex);

	return 0;
}

static int mxt_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct mxt_data *data = i2c_get_clientdata(client);
	struct input_dev *input_dev = data->input_dev;

	mxt_soft_reset(data);

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
		mxt_start(data);

	mutex_unlock(&input_dev->mutex);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);

static const struct i2c_device_id mxt_id[] = {
	{ "qt602240_ts", 0 },
	{ "atmel_mxt_ts", 0 },
	{ "atmel_mxt_tp", 0 },
	{ "mXT224", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, mxt_id);

static struct i2c_driver mxt_driver = {
	.driver = {
		.name	= "atmel_mxt_ts",
		.owner	= THIS_MODULE,
		.pm	= &mxt_pm_ops,
	},
	.probe		= mxt_probe,
	.remove		= mxt_remove,
	.id_table	= mxt_id,
};

module_i2c_driver(mxt_driver);

/* Module information */
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
MODULE_LICENSE("GPL");