aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/i2c/tvp514x.c
blob: d5e10215a28f46197d480aa51156cab605d7ef21 (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
/*
 * drivers/media/i2c/tvp514x.c
 *
 * TI TVP5146/47 decoder driver
 *
 * Copyright (C) 2008 Texas Instruments Inc
 * Author: Vaibhav Hiremath <hvaibhav@ti.com>
 *
 * Contributors:
 *     Sivaraj R <sivaraj@ti.com>
 *     Brijesh R Jadav <brijesh.j@ti.com>
 *     Hardik Shah <hardik.shah@ti.com>
 *     Manjunath Hadli <mrh@ti.com>
 *     Karicheri Muralidharan <m-karicheri2@ti.com>
 *
 * This package is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/module.h>

#include <media/v4l2-device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.h>
#include <media/tvp514x.h>

#include "tvp514x_regs.h"

/* Module Name */
#define TVP514X_MODULE_NAME		"tvp514x"

/* Private macros for TVP */
#define I2C_RETRY_COUNT                 (5)
#define LOCK_RETRY_COUNT                (5)
#define LOCK_RETRY_DELAY                (200)

/* Debug functions */
static bool debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");

MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TVP514X linux decoder driver");
MODULE_LICENSE("GPL");

/* enum tvp514x_std - enum for supported standards */
enum tvp514x_std {
	STD_NTSC_MJ = 0,
	STD_PAL_BDGHIN,
	STD_INVALID
};

/**
 * struct tvp514x_std_info - Structure to store standard informations
 * @width: Line width in pixels
 * @height:Number of active lines
 * @video_std: Value to write in REG_VIDEO_STD register
 * @standard: v4l2 standard structure information
 */
struct tvp514x_std_info {
	unsigned long width;
	unsigned long height;
	u8 video_std;
	struct v4l2_standard standard;
};

static struct tvp514x_reg tvp514x_reg_list_default[0x40];

static int tvp514x_s_stream(struct v4l2_subdev *sd, int enable);
/**
 * struct tvp514x_decoder - TVP5146/47 decoder object
 * @sd: Subdevice Slave handle
 * @tvp514x_regs: copy of hw's regs with preset values.
 * @pdata: Board specific
 * @ver: Chip version
 * @streaming: TVP5146/47 decoder streaming - enabled or disabled.
 * @current_std: Current standard
 * @num_stds: Number of standards
 * @std_list: Standards list
 * @input: Input routing at chip level
 * @output: Output routing at chip level
 */
struct tvp514x_decoder {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
	struct tvp514x_reg tvp514x_regs[ARRAY_SIZE(tvp514x_reg_list_default)];
	const struct tvp514x_platform_data *pdata;

	int ver;
	int streaming;

	enum tvp514x_std current_std;
	int num_stds;
	const struct tvp514x_std_info *std_list;
	/* Input and Output Routing parameters */
	u32 input;
	u32 output;
};

/* TVP514x default register values */
static struct tvp514x_reg tvp514x_reg_list_default[] = {
	/* Composite selected */
	{TOK_WRITE, REG_INPUT_SEL, 0x05},
	{TOK_WRITE, REG_AFE_GAIN_CTRL, 0x0F},
	/* Auto mode */
	{TOK_WRITE, REG_VIDEO_STD, 0x00},
	{TOK_WRITE, REG_OPERATION_MODE, 0x00},
	{TOK_SKIP, REG_AUTOSWITCH_MASK, 0x3F},
	{TOK_WRITE, REG_COLOR_KILLER, 0x10},
	{TOK_WRITE, REG_LUMA_CONTROL1, 0x00},
	{TOK_WRITE, REG_LUMA_CONTROL2, 0x00},
	{TOK_WRITE, REG_LUMA_CONTROL3, 0x02},
	{TOK_WRITE, REG_BRIGHTNESS, 0x80},
	{TOK_WRITE, REG_CONTRAST, 0x80},
	{TOK_WRITE, REG_SATURATION, 0x80},
	{TOK_WRITE, REG_HUE, 0x00},
	{TOK_WRITE, REG_CHROMA_CONTROL1, 0x00},
	{TOK_WRITE, REG_CHROMA_CONTROL2, 0x0E},
	/* Reserved */
	{TOK_SKIP, 0x0F, 0x00},
	{TOK_WRITE, REG_COMP_PR_SATURATION, 0x80},
	{TOK_WRITE, REG_COMP_Y_CONTRAST, 0x80},
	{TOK_WRITE, REG_COMP_PB_SATURATION, 0x80},
	/* Reserved */
	{TOK_SKIP, 0x13, 0x00},
	{TOK_WRITE, REG_COMP_Y_BRIGHTNESS, 0x80},
	/* Reserved */
	{TOK_SKIP, 0x15, 0x00},
	/* NTSC timing */
	{TOK_SKIP, REG_AVID_START_PIXEL_LSB, 0x55},
	{TOK_SKIP, REG_AVID_START_PIXEL_MSB, 0x00},
	{TOK_SKIP, REG_AVID_STOP_PIXEL_LSB, 0x25},
	{TOK_SKIP, REG_AVID_STOP_PIXEL_MSB, 0x03},
	/* NTSC timing */
	{TOK_SKIP, REG_HSYNC_START_PIXEL_LSB, 0x00},
	{TOK_SKIP, REG_HSYNC_START_PIXEL_MSB, 0x00},
	{TOK_SKIP, REG_HSYNC_STOP_PIXEL_LSB, 0x40},
	{TOK_SKIP, REG_HSYNC_STOP_PIXEL_MSB, 0x00},
	/* NTSC timing */
	{TOK_SKIP, REG_VSYNC_START_LINE_LSB, 0x04},
	{TOK_SKIP, REG_VSYNC_START_LINE_MSB, 0x00},
	{TOK_SKIP, REG_VSYNC_STOP_LINE_LSB, 0x07},
	{TOK_SKIP, REG_VSYNC_STOP_LINE_MSB, 0x00},
	/* NTSC timing */
	{TOK_SKIP, REG_VBLK_START_LINE_LSB, 0x01},
	{TOK_SKIP, REG_VBLK_START_LINE_MSB, 0x00},
	{TOK_SKIP, REG_VBLK_STOP_LINE_LSB, 0x15},
	{TOK_SKIP, REG_VBLK_STOP_LINE_MSB, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x26, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x27, 0x00},
	{TOK_SKIP, REG_FAST_SWTICH_CONTROL, 0xCC},
	/* Reserved */
	{TOK_SKIP, 0x29, 0x00},
	{TOK_SKIP, REG_FAST_SWTICH_SCART_DELAY, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x2B, 0x00},
	{TOK_SKIP, REG_SCART_DELAY, 0x00},
	{TOK_SKIP, REG_CTI_DELAY, 0x00},
	{TOK_SKIP, REG_CTI_CONTROL, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x2F, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x30, 0x00},
	/* Reserved */
	{TOK_SKIP, 0x31, 0x00},
	/* HS, VS active high */
	{TOK_WRITE, REG_SYNC_CONTROL, 0x00},
	/* 10-bit BT.656 */
	{TOK_WRITE, REG_OUTPUT_FORMATTER1, 0x00},
	/* Enable clk & data */
	{TOK_WRITE, REG_OUTPUT_FORMATTER2, 0x11},
	/* Enable AVID & FLD */
	{TOK_WRITE, REG_OUTPUT_FORMATTER3, 0xEE},
	/* Enable VS & HS */
	{TOK_WRITE, REG_OUTPUT_FORMATTER4, 0xAF},
	{TOK_WRITE, REG_OUTPUT_FORMATTER5, 0xFF},
	{TOK_WRITE, REG_OUTPUT_FORMATTER6, 0xFF},
	/* Clear status */
	{TOK_WRITE, REG_CLEAR_LOST_LOCK, 0x01},
	{TOK_TERM, 0, 0},
};

/**
 * Supported standards -
 *
 * Currently supports two standards only, need to add support for rest of the
 * modes, like SECAM, etc...
 */
static const struct tvp514x_std_info tvp514x_std_list[] = {
	/* Standard: STD_NTSC_MJ */
	[STD_NTSC_MJ] = {
	 .width = NTSC_NUM_ACTIVE_PIXELS,
	 .height = NTSC_NUM_ACTIVE_LINES,
	 .video_std = VIDEO_STD_NTSC_MJ_BIT,
	 .standard = {
		      .index = 0,
		      .id = V4L2_STD_NTSC,
		      .name = "NTSC",
		      .frameperiod = {1001, 30000},
		      .framelines = 525
		     },
	/* Standard: STD_PAL_BDGHIN */
	},
	[STD_PAL_BDGHIN] = {
	 .width = PAL_NUM_ACTIVE_PIXELS,
	 .height = PAL_NUM_ACTIVE_LINES,
	 .video_std = VIDEO_STD_PAL_BDGHIN_BIT,
	 .standard = {
		      .index = 1,
		      .id = V4L2_STD_PAL,
		      .name = "PAL",
		      .frameperiod = {1, 25},
		      .framelines = 625
		     },
	},
	/* Standard: need to add for additional standard */
};


static inline struct tvp514x_decoder *to_decoder(struct v4l2_subdev *sd)
{
	return container_of(sd, struct tvp514x_decoder, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct tvp514x_decoder, hdl)->sd;
}


/**
 * tvp514x_read_reg() - Read a value from a register in an TVP5146/47.
 * @sd: ptr to v4l2_subdev struct
 * @reg: TVP5146/47 register address
 *
 * Returns value read if successful, or non-zero (-1) otherwise.
 */
static int tvp514x_read_reg(struct v4l2_subdev *sd, u8 reg)
{
	int err, retry = 0;
	struct i2c_client *client = v4l2_get_subdevdata(sd);

read_again:

	err = i2c_smbus_read_byte_data(client, reg);
	if (err < 0) {
		if (retry <= I2C_RETRY_COUNT) {
			v4l2_warn(sd, "Read: retry ... %d\n", retry);
			retry++;
			msleep_interruptible(10);
			goto read_again;
		}
	}

	return err;
}

/**
 * dump_reg() - dump the register content of TVP5146/47.
 * @sd: ptr to v4l2_subdev struct
 * @reg: TVP5146/47 register address
 */
static void dump_reg(struct v4l2_subdev *sd, u8 reg)
{
	u32 val;

	val = tvp514x_read_reg(sd, reg);
	v4l2_info(sd, "Reg(0x%.2X): 0x%.2X\n", reg, val);
}

/**
 * tvp514x_write_reg() - Write a value to a register in TVP5146/47
 * @sd: ptr to v4l2_subdev struct
 * @reg: TVP5146/47 register address
 * @val: value to be written to the register
 *
 * Write a value to a register in an TVP5146/47 decoder device.
 * Returns zero if successful, or non-zero otherwise.
 */
static int tvp514x_write_reg(struct v4l2_subdev *sd, u8 reg, u8 val)
{
	int err, retry = 0;
	struct i2c_client *client = v4l2_get_subdevdata(sd);

write_again:

	err = i2c_smbus_write_byte_data(client, reg, val);
	if (err) {
		if (retry <= I2C_RETRY_COUNT) {
			v4l2_warn(sd, "Write: retry ... %d\n", retry);
			retry++;
			msleep_interruptible(10);
			goto write_again;
		}
	}

	return err;
}

/**
 * tvp514x_write_regs() : Initializes a list of TVP5146/47 registers
 * @sd: ptr to v4l2_subdev struct
 * @reglist: list of TVP5146/47 registers and values
 *
 * Initializes a list of TVP5146/47 registers:-
 *		if token is TOK_TERM, then entire write operation terminates
 *		if token is TOK_DELAY, then a delay of 'val' msec is introduced
 *		if token is TOK_SKIP, then the register write is skipped
 *		if token is TOK_WRITE, then the register write is performed
 * Returns zero if successful, or non-zero otherwise.
 */
static int tvp514x_write_regs(struct v4l2_subdev *sd,
			      const struct tvp514x_reg reglist[])
{
	int err;
	const struct tvp514x_reg *next = reglist;

	for (; next->token != TOK_TERM; next++) {
		if (next->token == TOK_DELAY) {
			msleep(next->val);
			continue;
		}

		if (next->token == TOK_SKIP)
			continue;

		err = tvp514x_write_reg(sd, next->reg, (u8) next->val);
		if (err) {
			v4l2_err(sd, "Write failed. Err[%d]\n", err);
			return err;
		}
	}
	return 0;
}

/**
 * tvp514x_query_current_std() : Query the current standard detected by TVP5146/47
 * @sd: ptr to v4l2_subdev struct
 *
 * Returns the current standard detected by TVP5146/47, STD_INVALID if there is no
 * standard detected.
 */
static enum tvp514x_std tvp514x_query_current_std(struct v4l2_subdev *sd)
{
	u8 std, std_status;

	std = tvp514x_read_reg(sd, REG_VIDEO_STD);
	if ((std & VIDEO_STD_MASK) == VIDEO_STD_AUTO_SWITCH_BIT)
		/* use the standard status register */
		std_status = tvp514x_read_reg(sd, REG_VIDEO_STD_STATUS);
	else
		/* use the standard register itself */
		std_status = std;

	switch (std_status & VIDEO_STD_MASK) {
	case VIDEO_STD_NTSC_MJ_BIT:
		return STD_NTSC_MJ;

	case VIDEO_STD_PAL_BDGHIN_BIT:
		return STD_PAL_BDGHIN;

	default:
		return STD_INVALID;
	}

	return STD_INVALID;
}

/* TVP5146/47 register dump function */
static void tvp514x_reg_dump(struct v4l2_subdev *sd)
{
	dump_reg(sd, REG_INPUT_SEL);
	dump_reg(sd, REG_AFE_GAIN_CTRL);
	dump_reg(sd, REG_VIDEO_STD);
	dump_reg(sd, REG_OPERATION_MODE);
	dump_reg(sd, REG_COLOR_KILLER);
	dump_reg(sd, REG_LUMA_CONTROL1);
	dump_reg(sd, REG_LUMA_CONTROL2);
	dump_reg(sd, REG_LUMA_CONTROL3);
	dump_reg(sd, REG_BRIGHTNESS);
	dump_reg(sd, REG_CONTRAST);
	dump_reg(sd, REG_SATURATION);
	dump_reg(sd, REG_HUE);
	dump_reg(sd, REG_CHROMA_CONTROL1);
	dump_reg(sd, REG_CHROMA_CONTROL2);
	dump_reg(sd, REG_COMP_PR_SATURATION);
	dump_reg(sd, REG_COMP_Y_CONTRAST);
	dump_reg(sd, REG_COMP_PB_SATURATION);
	dump_reg(sd, REG_COMP_Y_BRIGHTNESS);
	dump_reg(sd, REG_AVID_START_PIXEL_LSB);
	dump_reg(sd, REG_AVID_START_PIXEL_MSB);
	dump_reg(sd, REG_AVID_STOP_PIXEL_LSB);
	dump_reg(sd, REG_AVID_STOP_PIXEL_MSB);
	dump_reg(sd, REG_HSYNC_START_PIXEL_LSB);
	dump_reg(sd, REG_HSYNC_START_PIXEL_MSB);
	dump_reg(sd, REG_HSYNC_STOP_PIXEL_LSB);
	dump_reg(sd, REG_HSYNC_STOP_PIXEL_MSB);
	dump_reg(sd, REG_VSYNC_START_LINE_LSB);
	dump_reg(sd, REG_VSYNC_START_LINE_MSB);
	dump_reg(sd, REG_VSYNC_STOP_LINE_LSB);
	dump_reg(sd, REG_VSYNC_STOP_LINE_MSB);
	dump_reg(sd, REG_VBLK_START_LINE_LSB);
	dump_reg(sd, REG_VBLK_START_LINE_MSB);
	dump_reg(sd, REG_VBLK_STOP_LINE_LSB);
	dump_reg(sd, REG_VBLK_STOP_LINE_MSB);
	dump_reg(sd, REG_SYNC_CONTROL);
	dump_reg(sd, REG_OUTPUT_FORMATTER1);
	dump_reg(sd, REG_OUTPUT_FORMATTER2);
	dump_reg(sd, REG_OUTPUT_FORMATTER3);
	dump_reg(sd, REG_OUTPUT_FORMATTER4);
	dump_reg(sd, REG_OUTPUT_FORMATTER5);
	dump_reg(sd, REG_OUTPUT_FORMATTER6);
	dump_reg(sd, REG_CLEAR_LOST_LOCK);
}

/**
 * tvp514x_configure() - Configure the TVP5146/47 registers
 * @sd: ptr to v4l2_subdev struct
 * @decoder: ptr to tvp514x_decoder structure
 *
 * Returns zero if successful, or non-zero otherwise.
 */
static int tvp514x_configure(struct v4l2_subdev *sd,
		struct tvp514x_decoder *decoder)
{
	int err;

	/* common register initialization */
	err =
	    tvp514x_write_regs(sd, decoder->tvp514x_regs);
	if (err)
		return err;

	if (debug)
		tvp514x_reg_dump(sd);

	return 0;
}

/**
 * tvp514x_detect() - Detect if an tvp514x is present, and if so which revision.
 * @sd: pointer to standard V4L2 sub-device structure
 * @decoder: pointer to tvp514x_decoder structure
 *
 * A device is considered to be detected if the chip ID (LSB and MSB)
 * registers match the expected values.
 * Any value of the rom version register is accepted.
 * Returns ENODEV error number if no device is detected, or zero
 * if a device is detected.
 */
static int tvp514x_detect(struct v4l2_subdev *sd,
		struct tvp514x_decoder *decoder)
{
	u8 chip_id_msb, chip_id_lsb, rom_ver;
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	chip_id_msb = tvp514x_read_reg(sd, REG_CHIP_ID_MSB);
	chip_id_lsb = tvp514x_read_reg(sd, REG_CHIP_ID_LSB);
	rom_ver = tvp514x_read_reg(sd, REG_ROM_VERSION);

	v4l2_dbg(1, debug, sd,
		 "chip id detected msb:0x%x lsb:0x%x rom version:0x%x\n",
		 chip_id_msb, chip_id_lsb, rom_ver);
	if ((chip_id_msb != TVP514X_CHIP_ID_MSB)
		|| ((chip_id_lsb != TVP5146_CHIP_ID_LSB)
		&& (chip_id_lsb != TVP5147_CHIP_ID_LSB))) {
		/* We didn't read the values we expected, so this must not be
		 * an TVP5146/47.
		 */
		v4l2_err(sd, "chip id mismatch msb:0x%x lsb:0x%x\n",
				chip_id_msb, chip_id_lsb);
		return -ENODEV;
	}

	decoder->ver = rom_ver;

	v4l2_info(sd, "%s (Version - 0x%.2x) found at 0x%x (%s)\n",
			client->name, decoder->ver,
			client->addr << 1, client->adapter->name);
	return 0;
}

/**
 * tvp514x_querystd() - V4L2 decoder interface handler for querystd
 * @sd: pointer to standard V4L2 sub-device structure
 * @std_id: standard V4L2 std_id ioctl enum
 *
 * Returns the current standard detected by TVP5146/47. If no active input is
 * detected then *std_id is set to 0 and the function returns 0.
 */
static int tvp514x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std_id)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	enum tvp514x_std current_std;
	enum tvp514x_input input_sel;
	u8 sync_lock_status, lock_mask;

	if (std_id == NULL)
		return -EINVAL;

	*std_id = V4L2_STD_UNKNOWN;

	/* To query the standard the TVP514x must power on the ADCs. */
	if (!decoder->streaming) {
		tvp514x_s_stream(sd, 1);
		msleep(LOCK_RETRY_DELAY);
	}

	/* query the current standard */
	current_std = tvp514x_query_current_std(sd);
	if (current_std == STD_INVALID)
		return 0;

	input_sel = decoder->input;

	switch (input_sel) {
	case INPUT_CVBS_VI1A:
	case INPUT_CVBS_VI1B:
	case INPUT_CVBS_VI1C:
	case INPUT_CVBS_VI2A:
	case INPUT_CVBS_VI2B:
	case INPUT_CVBS_VI2C:
	case INPUT_CVBS_VI3A:
	case INPUT_CVBS_VI3B:
	case INPUT_CVBS_VI3C:
	case INPUT_CVBS_VI4A:
		lock_mask = STATUS_CLR_SUBCAR_LOCK_BIT |
			STATUS_HORZ_SYNC_LOCK_BIT |
			STATUS_VIRT_SYNC_LOCK_BIT;
		break;

	case INPUT_SVIDEO_VI2A_VI1A:
	case INPUT_SVIDEO_VI2B_VI1B:
	case INPUT_SVIDEO_VI2C_VI1C:
	case INPUT_SVIDEO_VI2A_VI3A:
	case INPUT_SVIDEO_VI2B_VI3B:
	case INPUT_SVIDEO_VI2C_VI3C:
	case INPUT_SVIDEO_VI4A_VI1A:
	case INPUT_SVIDEO_VI4A_VI1B:
	case INPUT_SVIDEO_VI4A_VI1C:
	case INPUT_SVIDEO_VI4A_VI3A:
	case INPUT_SVIDEO_VI4A_VI3B:
	case INPUT_SVIDEO_VI4A_VI3C:
		lock_mask = STATUS_HORZ_SYNC_LOCK_BIT |
			STATUS_VIRT_SYNC_LOCK_BIT;
		break;
		/*Need to add other interfaces*/
	default:
		return -EINVAL;
	}
	/* check whether signal is locked */
	sync_lock_status = tvp514x_read_reg(sd, REG_STATUS1);
	if (lock_mask != (sync_lock_status & lock_mask))
		return 0;	/* No input detected */

	*std_id = decoder->std_list[current_std].standard.id;

	v4l2_dbg(1, debug, sd, "Current STD: %s\n",
			decoder->std_list[current_std].standard.name);
	return 0;
}

/**
 * tvp514x_s_std() - V4L2 decoder interface handler for s_std
 * @sd: pointer to standard V4L2 sub-device structure
 * @std_id: standard V4L2 v4l2_std_id ioctl enum
 *
 * If std_id is supported, sets the requested standard. Otherwise, returns
 * -EINVAL
 */
static int tvp514x_s_std(struct v4l2_subdev *sd, v4l2_std_id std_id)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	int err, i;

	for (i = 0; i < decoder->num_stds; i++)
		if (std_id & decoder->std_list[i].standard.id)
			break;

	if ((i == decoder->num_stds) || (i == STD_INVALID))
		return -EINVAL;

	err = tvp514x_write_reg(sd, REG_VIDEO_STD,
				decoder->std_list[i].video_std);
	if (err)
		return err;

	decoder->current_std = i;
	decoder->tvp514x_regs[REG_VIDEO_STD].val =
		decoder->std_list[i].video_std;

	v4l2_dbg(1, debug, sd, "Standard set to: %s\n",
			decoder->std_list[i].standard.name);
	return 0;
}

/**
 * tvp514x_s_routing() - V4L2 decoder interface handler for s_routing
 * @sd: pointer to standard V4L2 sub-device structure
 * @input: input selector for routing the signal
 * @output: output selector for routing the signal
 * @config: config value. Not used
 *
 * If index is valid, selects the requested input. Otherwise, returns -EINVAL if
 * the input is not supported or there is no active signal present in the
 * selected input.
 */
static int tvp514x_s_routing(struct v4l2_subdev *sd,
				u32 input, u32 output, u32 config)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	int err;
	enum tvp514x_input input_sel;
	enum tvp514x_output output_sel;

	if ((input >= INPUT_INVALID) ||
			(output >= OUTPUT_INVALID))
		/* Index out of bound */
		return -EINVAL;

	input_sel = input;
	output_sel = output;

	err = tvp514x_write_reg(sd, REG_INPUT_SEL, input_sel);
	if (err)
		return err;

	output_sel |= tvp514x_read_reg(sd,
			REG_OUTPUT_FORMATTER1) & 0x7;
	err = tvp514x_write_reg(sd, REG_OUTPUT_FORMATTER1,
			output_sel);
	if (err)
		return err;

	decoder->tvp514x_regs[REG_INPUT_SEL].val = input_sel;
	decoder->tvp514x_regs[REG_OUTPUT_FORMATTER1].val = output_sel;
	decoder->input = input;
	decoder->output = output;

	v4l2_dbg(1, debug, sd, "Input set to: %d\n", input_sel);

	return 0;
}

/**
 * tvp514x_s_ctrl() - V4L2 decoder interface handler for s_ctrl
 * @ctrl: pointer to v4l2_ctrl structure
 *
 * If the requested control is supported, sets the control's current
 * value in HW. Otherwise, returns -EINVAL if the control is not supported.
 */
static int tvp514x_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct tvp514x_decoder *decoder = to_decoder(sd);
	int err = -EINVAL, value;

	value = ctrl->val;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		err = tvp514x_write_reg(sd, REG_BRIGHTNESS, value);
		if (!err)
			decoder->tvp514x_regs[REG_BRIGHTNESS].val = value;
		break;
	case V4L2_CID_CONTRAST:
		err = tvp514x_write_reg(sd, REG_CONTRAST, value);
		if (!err)
			decoder->tvp514x_regs[REG_CONTRAST].val = value;
		break;
	case V4L2_CID_SATURATION:
		err = tvp514x_write_reg(sd, REG_SATURATION, value);
		if (!err)
			decoder->tvp514x_regs[REG_SATURATION].val = value;
		break;
	case V4L2_CID_HUE:
		if (value == 180)
			value = 0x7F;
		else if (value == -180)
			value = 0x80;
		err = tvp514x_write_reg(sd, REG_HUE, value);
		if (!err)
			decoder->tvp514x_regs[REG_HUE].val = value;
		break;
	case V4L2_CID_AUTOGAIN:
		err = tvp514x_write_reg(sd, REG_AFE_GAIN_CTRL, value ? 0x0f : 0x0c);
		if (!err)
			decoder->tvp514x_regs[REG_AFE_GAIN_CTRL].val = value;
		break;
	}

	v4l2_dbg(1, debug, sd, "Set Control: ID - %d - %d\n",
			ctrl->id, ctrl->val);
	return err;
}

/**
 * tvp514x_enum_mbus_fmt() - V4L2 decoder interface handler for enum_mbus_fmt
 * @sd: pointer to standard V4L2 sub-device structure
 * @index: index of pixelcode to retrieve
 * @code: receives the pixelcode
 *
 * Enumerates supported mediabus formats
 */
static int
tvp514x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
					enum v4l2_mbus_pixelcode *code)
{
	if (index)
		return -EINVAL;

	*code = V4L2_MBUS_FMT_YUYV10_2X10;
	return 0;
}

/**
 * tvp514x_mbus_fmt_cap() - V4L2 decoder interface handler for try/s/g_mbus_fmt
 * @sd: pointer to standard V4L2 sub-device structure
 * @f: pointer to the mediabus format structure
 *
 * Negotiates the image capture size and mediabus format.
 */
static int
tvp514x_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	enum tvp514x_std current_std;

	if (f == NULL)
		return -EINVAL;

	/* Calculate height and width based on current standard */
	current_std = decoder->current_std;

	f->code = V4L2_MBUS_FMT_YUYV10_2X10;
	f->width = decoder->std_list[current_std].width;
	f->height = decoder->std_list[current_std].height;
	f->field = V4L2_FIELD_INTERLACED;
	f->colorspace = V4L2_COLORSPACE_SMPTE170M;

	v4l2_dbg(1, debug, sd, "MBUS_FMT: Width - %d, Height - %d\n",
			f->width, f->height);
	return 0;
}

/**
 * tvp514x_g_parm() - V4L2 decoder interface handler for g_parm
 * @sd: pointer to standard V4L2 sub-device structure
 * @a: pointer to standard V4L2 VIDIOC_G_PARM ioctl structure
 *
 * Returns the decoder's video CAPTURE parameters.
 */
static int
tvp514x_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	struct v4l2_captureparm *cparm;
	enum tvp514x_std current_std;

	if (a == NULL)
		return -EINVAL;

	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		/* only capture is supported */
		return -EINVAL;

	/* get the current standard */
	current_std = decoder->current_std;

	cparm = &a->parm.capture;
	cparm->capability = V4L2_CAP_TIMEPERFRAME;
	cparm->timeperframe =
		decoder->std_list[current_std].standard.frameperiod;

	return 0;
}

/**
 * tvp514x_s_parm() - V4L2 decoder interface handler for s_parm
 * @sd: pointer to standard V4L2 sub-device structure
 * @a: pointer to standard V4L2 VIDIOC_S_PARM ioctl structure
 *
 * Configures the decoder to use the input parameters, if possible. If
 * not possible, returns the appropriate error code.
 */
static int
tvp514x_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
	struct tvp514x_decoder *decoder = to_decoder(sd);
	struct v4l2_fract *timeperframe;
	enum tvp514x_std current_std;

	if (a == NULL)
		return -EINVAL;

	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		/* only capture is supported */
		return -EINVAL;

	timeperframe = &a->parm.capture.timeperframe;

	/* get the current standard */
	current_std = decoder->current_std;

	*timeperframe =
	    decoder->std_list[current_std].standard.frameperiod;

	return 0;
}

/**
 * tvp514x_s_stream() - V4L2 decoder i/f handler for s_stream
 * @sd: pointer to standard V4L2 sub-device structure
 * @enable: streaming enable or disable
 *
 * Sets streaming to enable or disable, if possible.
 */
static int tvp514x_s_stream(struct v4l2_subdev *sd, int enable)
{
	int err = 0;
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct tvp514x_decoder *decoder = to_decoder(sd);

	if (decoder->streaming == enable)
		return 0;

	switch (enable) {
	case 0:
	{
		/* Power Down Sequence */
		err = tvp514x_write_reg(sd, REG_OPERATION_MODE, 0x01);
		if (err) {
			v4l2_err(sd, "Unable to turn off decoder\n");
			return err;
		}
		decoder->streaming = enable;
		break;
	}
	case 1:
	{
		struct tvp514x_reg *int_seq = (struct tvp514x_reg *)
				client->driver->id_table->driver_data;

		/* Power Up Sequence */
		err = tvp514x_write_regs(sd, int_seq);
		if (err) {
			v4l2_err(sd, "Unable to turn on decoder\n");
			return err;
		}
		/* Detect if not already detected */
		err = tvp514x_detect(sd, decoder);
		if (err) {
			v4l2_err(sd, "Unable to detect decoder\n");
			return err;
		}
		err = tvp514x_configure(sd, decoder);
		if (err) {
			v4l2_err(sd, "Unable to configure decoder\n");
			return err;
		}
		decoder->streaming = enable;
		break;
	}
	default:
		err = -ENODEV;
		break;
	}

	return err;
}

static const struct v4l2_ctrl_ops tvp514x_ctrl_ops = {
	.s_ctrl = tvp514x_s_ctrl,
};

static const struct v4l2_subdev_core_ops tvp514x_core_ops = {
	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	.g_ctrl = v4l2_subdev_g_ctrl,
	.s_ctrl = v4l2_subdev_s_ctrl,
	.queryctrl = v4l2_subdev_queryctrl,
	.querymenu = v4l2_subdev_querymenu,
	.s_std = tvp514x_s_std,
};

static const struct v4l2_subdev_video_ops tvp514x_video_ops = {
	.s_routing = tvp514x_s_routing,
	.querystd = tvp514x_querystd,
	.enum_mbus_fmt = tvp514x_enum_mbus_fmt,
	.g_mbus_fmt = tvp514x_mbus_fmt,
	.try_mbus_fmt = tvp514x_mbus_fmt,
	.s_mbus_fmt = tvp514x_mbus_fmt,
	.g_parm = tvp514x_g_parm,
	.s_parm = tvp514x_s_parm,
	.s_stream = tvp514x_s_stream,
};

static const struct v4l2_subdev_ops tvp514x_ops = {
	.core = &tvp514x_core_ops,
	.video = &tvp514x_video_ops,
};

static struct tvp514x_decoder tvp514x_dev = {
	.streaming = 0,
	.current_std = STD_NTSC_MJ,
	.std_list = tvp514x_std_list,
	.num_stds = ARRAY_SIZE(tvp514x_std_list),

};

/**
 * tvp514x_probe() - decoder driver i2c probe handler
 * @client: i2c driver client device structure
 * @id: i2c driver id table
 *
 * Register decoder as an i2c client device and V4L2
 * device.
 */
static int
tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	struct tvp514x_decoder *decoder;
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	if (!client->dev.platform_data) {
		v4l2_err(client, "No platform data!!\n");
		return -ENODEV;
	}

	decoder = kzalloc(sizeof(*decoder), GFP_KERNEL);
	if (!decoder)
		return -ENOMEM;

	/* Initialize the tvp514x_decoder with default configuration */
	*decoder = tvp514x_dev;
	/* Copy default register configuration */
	memcpy(decoder->tvp514x_regs, tvp514x_reg_list_default,
			sizeof(tvp514x_reg_list_default));

	/* Copy board specific information here */
	decoder->pdata = client->dev.platform_data;

	/**
	 * Fetch platform specific data, and configure the
	 * tvp514x_reg_list[] accordingly. Since this is one
	 * time configuration, no need to preserve.
	 */
	decoder->tvp514x_regs[REG_OUTPUT_FORMATTER2].val |=
		(decoder->pdata->clk_polarity << 1);
	decoder->tvp514x_regs[REG_SYNC_CONTROL].val |=
		((decoder->pdata->hs_polarity << 2) |
		 (decoder->pdata->vs_polarity << 3));
	/* Set default standard to auto */
	decoder->tvp514x_regs[REG_VIDEO_STD].val =
		VIDEO_STD_AUTO_SWITCH_BIT;

	/* Register with V4L2 layer as slave device */
	sd = &decoder->sd;
	v4l2_i2c_subdev_init(sd, client, &tvp514x_ops);

	v4l2_ctrl_handler_init(&decoder->hdl, 5);
	v4l2_ctrl_new_std(&decoder->hdl, &tvp514x_ctrl_ops,
		V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
	v4l2_ctrl_new_std(&decoder->hdl, &tvp514x_ctrl_ops,
		V4L2_CID_CONTRAST, 0, 255, 1, 128);
	v4l2_ctrl_new_std(&decoder->hdl, &tvp514x_ctrl_ops,
		V4L2_CID_SATURATION, 0, 255, 1, 128);
	v4l2_ctrl_new_std(&decoder->hdl, &tvp514x_ctrl_ops,
		V4L2_CID_HUE, -180, 180, 180, 0);
	v4l2_ctrl_new_std(&decoder->hdl, &tvp514x_ctrl_ops,
		V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
	sd->ctrl_handler = &decoder->hdl;
	if (decoder->hdl.error) {
		int err = decoder->hdl.error;

		v4l2_ctrl_handler_free(&decoder->hdl);
		kfree(decoder);
		return err;
	}
	v4l2_ctrl_handler_setup(&decoder->hdl);

	v4l2_info(sd, "%s decoder driver registered !!\n", sd->name);

	return 0;

}

/**
 * tvp514x_remove() - decoder driver i2c remove handler
 * @client: i2c driver client device structure
 *
 * Unregister decoder as an i2c client device and V4L2
 * device. Complement of tvp514x_probe().
 */
static int tvp514x_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct tvp514x_decoder *decoder = to_decoder(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&decoder->hdl);
	kfree(decoder);
	return 0;
}
/* TVP5146 Init/Power on Sequence */
static const struct tvp514x_reg tvp5146_init_reg_seq[] = {
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x02},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0x80},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x01},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x60},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0xB0},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x01},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x00},
	{TOK_WRITE, REG_OPERATION_MODE, 0x01},
	{TOK_WRITE, REG_OPERATION_MODE, 0x00},
	{TOK_TERM, 0, 0},
};

/* TVP5147 Init/Power on Sequence */
static const struct tvp514x_reg tvp5147_init_reg_seq[] =	{
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x02},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0x80},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x01},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x60},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0xB0},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x01},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x16},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0xA0},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x16},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS1, 0x60},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS2, 0x00},
	{TOK_WRITE, REG_VBUS_ADDRESS_ACCESS3, 0xB0},
	{TOK_WRITE, REG_VBUS_DATA_ACCESS_NO_VBUS_ADDR_INCR, 0x00},
	{TOK_WRITE, REG_OPERATION_MODE, 0x01},
	{TOK_WRITE, REG_OPERATION_MODE, 0x00},
	{TOK_TERM, 0, 0},
};

/* TVP5146M2/TVP5147M1 Init/Power on Sequence */
static const struct tvp514x_reg tvp514xm_init_reg_seq[] = {
	{TOK_WRITE, REG_OPERATION_MODE, 0x01},
	{TOK_WRITE, REG_OPERATION_MODE, 0x00},
	{TOK_TERM, 0, 0},
};

/**
 * I2C Device Table -
 *
 * name - Name of the actual device/chip.
 * driver_data - Driver data
 */
static const struct i2c_device_id tvp514x_id[] = {
	{"tvp5146", (unsigned long)tvp5146_init_reg_seq},
	{"tvp5146m2", (unsigned long)tvp514xm_init_reg_seq},
	{"tvp5147", (unsigned long)tvp5147_init_reg_seq},
	{"tvp5147m1", (unsigned long)tvp514xm_init_reg_seq},
	{},
};

MODULE_DEVICE_TABLE(i2c, tvp514x_id);

static struct i2c_driver tvp514x_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name = TVP514X_MODULE_NAME,
	},
	.probe = tvp514x_probe,
	.remove = tvp514x_remove,
	.id_table = tvp514x_id,
};

module_i2c_driver(tvp514x_driver);