summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/davinci/isif.c
blob: b99d5423e3a8dc16d115c244e6e391f870924c79 (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
/*
 * Copyright (C) 2008-2009 Texas Instruments Inc
 *
 * 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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Image Sensor Interface (ISIF) driver
 *
 * This driver is for configuring the ISIF IP available on DM365 or any other
 * TI SoCs. This is used for capturing yuv or bayer video or image data
 * from a decoder or sensor. This IP is similar to the CCDC IP on DM355
 * and DM6446, but with enhanced or additional ip blocks. The driver
 * configures the ISIF upon commands from the vpfe bridge driver through
 * ccdc_hw_device interface.
 *
 * TODO: 1) Raw bayer parameter settings and bayer capture
 *	 2) Add support for control ioctl
 */
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/videodev2.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/module.h>

#include <mach/mux.h>

#include <media/davinci/isif.h>
#include <media/davinci/vpss.h>

#include "isif_regs.h"
#include "ccdc_hw_device.h"

/* Defaults for module configuration parameters */
static struct isif_config_params_raw isif_config_defaults = {
	.linearize = {
		.en = 0,
		.corr_shft = ISIF_NO_SHIFT,
		.scale_fact = {1, 0},
	},
	.df_csc = {
		.df_or_csc = 0,
		.csc = {
			.en = 0,
		},
	},
	.dfc = {
		.en = 0,
	},
	.bclamp = {
		.en = 0,
	},
	.gain_offset = {
		.gain = {
			.r_ye = {1, 0},
			.gr_cy = {1, 0},
			.gb_g = {1, 0},
			.b_mg = {1, 0},
		},
	},
	.culling = {
		.hcpat_odd = 0xff,
		.hcpat_even = 0xff,
		.vcpat = 0xff,
	},
	.compress = {
		.alg = ISIF_ALAW,
	},
};

/* ISIF operation configuration */
static struct isif_oper_config {
	struct device *dev;
	enum vpfe_hw_if_type if_type;
	struct isif_ycbcr_config ycbcr;
	struct isif_params_raw bayer;
	enum isif_data_pack data_pack;
	/* Master clock */
	struct clk *mclk;
	/* ISIF base address */
	void __iomem *base_addr;
	/* ISIF Linear Table 0 */
	void __iomem *linear_tbl0_addr;
	/* ISIF Linear Table 1 */
	void __iomem *linear_tbl1_addr;
} isif_cfg = {
	.ycbcr = {
		.pix_fmt = CCDC_PIXFMT_YCBCR_8BIT,
		.frm_fmt = CCDC_FRMFMT_INTERLACED,
		.win = ISIF_WIN_NTSC,
		.fid_pol = VPFE_PINPOL_POSITIVE,
		.vd_pol = VPFE_PINPOL_POSITIVE,
		.hd_pol = VPFE_PINPOL_POSITIVE,
		.pix_order = CCDC_PIXORDER_CBYCRY,
		.buf_type = CCDC_BUFTYPE_FLD_INTERLEAVED,
	},
	.bayer = {
		.pix_fmt = CCDC_PIXFMT_RAW,
		.frm_fmt = CCDC_FRMFMT_PROGRESSIVE,
		.win = ISIF_WIN_VGA,
		.fid_pol = VPFE_PINPOL_POSITIVE,
		.vd_pol = VPFE_PINPOL_POSITIVE,
		.hd_pol = VPFE_PINPOL_POSITIVE,
		.gain = {
			.r_ye = {1, 0},
			.gr_cy = {1, 0},
			.gb_g = {1, 0},
			.b_mg = {1, 0},
		},
		.cfa_pat = ISIF_CFA_PAT_MOSAIC,
		.data_msb = ISIF_BIT_MSB_11,
		.config_params = {
			.data_shift = ISIF_NO_SHIFT,
			.col_pat_field0 = {
				.olop = ISIF_GREEN_BLUE,
				.olep = ISIF_BLUE,
				.elop = ISIF_RED,
				.elep = ISIF_GREEN_RED,
			},
			.col_pat_field1 = {
				.olop = ISIF_GREEN_BLUE,
				.olep = ISIF_BLUE,
				.elop = ISIF_RED,
				.elep = ISIF_GREEN_RED,
			},
			.test_pat_gen = 0,
		},
	},
	.data_pack = ISIF_DATA_PACK8,
};

/* Raw Bayer formats */
static const u32 isif_raw_bayer_pix_formats[] = {
	V4L2_PIX_FMT_SBGGR8, V4L2_PIX_FMT_SBGGR16};

/* Raw YUV formats */
static const u32 isif_raw_yuv_pix_formats[] = {
	V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_YUYV};

/* register access routines */
static inline u32 regr(u32 offset)
{
	return __raw_readl(isif_cfg.base_addr + offset);
}

static inline void regw(u32 val, u32 offset)
{
	__raw_writel(val, isif_cfg.base_addr + offset);
}

/* reg_modify() - read, modify and write register */
static inline u32 reg_modify(u32 mask, u32 val, u32 offset)
{
	u32 new_val = (regr(offset) & ~mask) | (val & mask);

	regw(new_val, offset);
	return new_val;
}

static inline void regw_lin_tbl(u32 val, u32 offset, int i)
{
	if (!i)
		__raw_writel(val, isif_cfg.linear_tbl0_addr + offset);
	else
		__raw_writel(val, isif_cfg.linear_tbl1_addr + offset);
}

static void isif_disable_all_modules(void)
{
	/* disable BC */
	regw(0, CLAMPCFG);
	/* disable vdfc */
	regw(0, DFCCTL);
	/* disable CSC */
	regw(0, CSCCTL);
	/* disable linearization */
	regw(0, LINCFG0);
	/* disable other modules here as they are supported */
}

static void isif_enable(int en)
{
	if (!en) {
		/* Before disable isif, disable all ISIF modules */
		isif_disable_all_modules();
		/*
		 * wait for next VD. Assume lowest scan rate is 12 Hz. So
		 * 100 msec delay is good enough
		 */
		msleep(100);
	}
	reg_modify(ISIF_SYNCEN_VDHDEN_MASK, en, SYNCEN);
}

static void isif_enable_output_to_sdram(int en)
{
	reg_modify(ISIF_SYNCEN_WEN_MASK, en << ISIF_SYNCEN_WEN_SHIFT, SYNCEN);
}

static void isif_config_culling(struct isif_cul *cul)
{
	u32 val;

	/* Horizontal pattern */
	val = (cul->hcpat_even << CULL_PAT_EVEN_LINE_SHIFT) | cul->hcpat_odd;
	regw(val, CULH);

	/* vertical pattern */
	regw(cul->vcpat, CULV);

	/* LPF */
	reg_modify(ISIF_LPF_MASK << ISIF_LPF_SHIFT,
		  cul->en_lpf << ISIF_LPF_SHIFT, MODESET);
}

static void isif_config_gain_offset(void)
{
	struct isif_gain_offsets_adj *gain_off_p =
		&isif_cfg.bayer.config_params.gain_offset;
	u32 val;

	val = (!!gain_off_p->gain_sdram_en << GAIN_SDRAM_EN_SHIFT) |
	      (!!gain_off_p->gain_ipipe_en << GAIN_IPIPE_EN_SHIFT) |
	      (!!gain_off_p->gain_h3a_en << GAIN_H3A_EN_SHIFT) |
	      (!!gain_off_p->offset_sdram_en << OFST_SDRAM_EN_SHIFT) |
	      (!!gain_off_p->offset_ipipe_en << OFST_IPIPE_EN_SHIFT) |
	      (!!gain_off_p->offset_h3a_en << OFST_H3A_EN_SHIFT);

	reg_modify(GAIN_OFFSET_EN_MASK, val, CGAMMAWD);

	val = (gain_off_p->gain.r_ye.integer << GAIN_INTEGER_SHIFT) |
	       gain_off_p->gain.r_ye.decimal;
	regw(val, CRGAIN);

	val = (gain_off_p->gain.gr_cy.integer << GAIN_INTEGER_SHIFT) |
	       gain_off_p->gain.gr_cy.decimal;
	regw(val, CGRGAIN);

	val = (gain_off_p->gain.gb_g.integer << GAIN_INTEGER_SHIFT) |
	       gain_off_p->gain.gb_g.decimal;
	regw(val, CGBGAIN);

	val = (gain_off_p->gain.b_mg.integer << GAIN_INTEGER_SHIFT) |
	       gain_off_p->gain.b_mg.decimal;
	regw(val, CBGAIN);

	regw(gain_off_p->offset, COFSTA);
}

static void isif_restore_defaults(void)
{
	enum vpss_ccdc_source_sel source = VPSS_CCDCIN;

	dev_dbg(isif_cfg.dev, "\nstarting isif_restore_defaults...");
	isif_cfg.bayer.config_params = isif_config_defaults;
	/* Enable clock to ISIF, IPIPEIF and BL */
	vpss_enable_clock(VPSS_CCDC_CLOCK, 1);
	vpss_enable_clock(VPSS_IPIPEIF_CLOCK, 1);
	vpss_enable_clock(VPSS_BL_CLOCK, 1);
	/* Set default offset and gain */
	isif_config_gain_offset();
	vpss_select_ccdc_source(source);
	dev_dbg(isif_cfg.dev, "\nEnd of isif_restore_defaults...");
}

static int isif_open(struct device *device)
{
	isif_restore_defaults();
	return 0;
}

/* This function will configure the window size to be capture in ISIF reg */
static void isif_setwin(struct v4l2_rect *image_win,
			enum ccdc_frmfmt frm_fmt, int ppc)
{
	int horz_start, horz_nr_pixels;
	int vert_start, vert_nr_lines;
	int mid_img = 0;

	dev_dbg(isif_cfg.dev, "\nStarting isif_setwin...");
	/*
	 * ppc - per pixel count. indicates how many pixels per cell
	 * output to SDRAM. example, for ycbcr, it is one y and one c, so 2.
	 * raw capture this is 1
	 */
	horz_start = image_win->left << (ppc - 1);
	horz_nr_pixels = ((image_win->width) << (ppc - 1)) - 1;

	/* Writing the horizontal info into the registers */
	regw(horz_start & START_PX_HOR_MASK, SPH);
	regw(horz_nr_pixels & NUM_PX_HOR_MASK, LNH);
	vert_start = image_win->top;

	if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
		vert_nr_lines = (image_win->height >> 1) - 1;
		vert_start >>= 1;
		/* To account for VD since line 0 doesn't have any data */
		vert_start += 1;
	} else {
		/* To account for VD since line 0 doesn't have any data */
		vert_start += 1;
		vert_nr_lines = image_win->height - 1;
		/* configure VDINT0 and VDINT1 */
		mid_img = vert_start + (image_win->height / 2);
		regw(mid_img, VDINT1);
	}

	regw(0, VDINT0);
	regw(vert_start & START_VER_ONE_MASK, SLV0);
	regw(vert_start & START_VER_TWO_MASK, SLV1);
	regw(vert_nr_lines & NUM_LINES_VER, LNV);
}

static void isif_config_bclamp(struct isif_black_clamp *bc)
{
	u32 val;

	/*
	 * DC Offset is always added to image data irrespective of bc enable
	 * status
	 */
	regw(bc->dc_offset, CLDCOFST);

	if (bc->en) {
		val = bc->bc_mode_color << ISIF_BC_MODE_COLOR_SHIFT;

		/* Enable BC and horizontal clamp caculation paramaters */
		val = val | 1 | (bc->horz.mode << ISIF_HORZ_BC_MODE_SHIFT);

		regw(val, CLAMPCFG);

		if (bc->horz.mode != ISIF_HORZ_BC_DISABLE) {
			/*
			 * Window count for calculation
			 * Base window selection
			 * pixel limit
			 * Horizontal size of window
			 * vertical size of the window
			 * Horizontal start position of the window
			 * Vertical start position of the window
			 */
			val = bc->horz.win_count_calc |
			      ((!!bc->horz.base_win_sel_calc) <<
				ISIF_HORZ_BC_WIN_SEL_SHIFT) |
			      ((!!bc->horz.clamp_pix_limit) <<
				ISIF_HORZ_BC_PIX_LIMIT_SHIFT) |
			      (bc->horz.win_h_sz_calc <<
				ISIF_HORZ_BC_WIN_H_SIZE_SHIFT) |
			      (bc->horz.win_v_sz_calc <<
				ISIF_HORZ_BC_WIN_V_SIZE_SHIFT);
			regw(val, CLHWIN0);

			regw(bc->horz.win_start_h_calc, CLHWIN1);
			regw(bc->horz.win_start_v_calc, CLHWIN2);
		}

		/* vertical clamp caculation paramaters */

		/* Reset clamp value sel for previous line */
		val |=
		(bc->vert.reset_val_sel << ISIF_VERT_BC_RST_VAL_SEL_SHIFT) |
		(bc->vert.line_ave_coef << ISIF_VERT_BC_LINE_AVE_COEF_SHIFT);
		regw(val, CLVWIN0);

		/* Optical Black horizontal start position */
		regw(bc->vert.ob_start_h, CLVWIN1);
		/* Optical Black vertical start position */
		regw(bc->vert.ob_start_v, CLVWIN2);
		/* Optical Black vertical size for calculation */
		regw(bc->vert.ob_v_sz_calc, CLVWIN3);
		/* Vertical start position for BC subtraction */
		regw(bc->vert_start_sub, CLSV);
	}
}

static void isif_config_linearization(struct isif_linearize *linearize)
{
	u32 val, i;

	if (!linearize->en) {
		regw(0, LINCFG0);
		return;
	}

	/* shift value for correction & enable linearization (set lsb) */
	val = (linearize->corr_shft << ISIF_LIN_CORRSFT_SHIFT) | 1;
	regw(val, LINCFG0);

	/* Scale factor */
	val = ((!!linearize->scale_fact.integer) <<
	       ISIF_LIN_SCALE_FACT_INTEG_SHIFT) |
	       linearize->scale_fact.decimal;
	regw(val, LINCFG1);

	for (i = 0; i < ISIF_LINEAR_TAB_SIZE; i++) {
		if (i % 2)
			regw_lin_tbl(linearize->table[i], ((i >> 1) << 2), 1);
		else
			regw_lin_tbl(linearize->table[i], ((i >> 1) << 2), 0);
	}
}

static int isif_config_dfc(struct isif_dfc *vdfc)
{
	/* initialize retries to loop for max ~ 250 usec */
	u32 val, count, retries = loops_per_jiffy / (4000/HZ);
	int i;

	if (!vdfc->en)
		return 0;

	/* Correction mode */
	val = (vdfc->corr_mode << ISIF_VDFC_CORR_MOD_SHIFT);

	/* Correct whole line or partial */
	if (vdfc->corr_whole_line)
		val |= 1 << ISIF_VDFC_CORR_WHOLE_LN_SHIFT;

	/* level shift value */
	val |= vdfc->def_level_shift << ISIF_VDFC_LEVEL_SHFT_SHIFT;

	regw(val, DFCCTL);

	/* Defect saturation level */
	regw(vdfc->def_sat_level, VDFSATLV);

	regw(vdfc->table[0].pos_vert, DFCMEM0);
	regw(vdfc->table[0].pos_horz, DFCMEM1);
	if (vdfc->corr_mode == ISIF_VDFC_NORMAL ||
	    vdfc->corr_mode == ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
		regw(vdfc->table[0].level_at_pos, DFCMEM2);
		regw(vdfc->table[0].level_up_pixels, DFCMEM3);
		regw(vdfc->table[0].level_low_pixels, DFCMEM4);
	}

	/* set DFCMARST and set DFCMWR */
	val = regr(DFCMEMCTL) | (1 << ISIF_DFCMEMCTL_DFCMARST_SHIFT) | 1;
	regw(val, DFCMEMCTL);

	count = retries;
	while (count && (regr(DFCMEMCTL) & 0x1))
		count--;

	if (!count) {
		dev_dbg(isif_cfg.dev, "defect table write timeout !!!\n");
		return -1;
	}

	for (i = 1; i < vdfc->num_vdefects; i++) {
		regw(vdfc->table[i].pos_vert, DFCMEM0);
		regw(vdfc->table[i].pos_horz, DFCMEM1);
		if (vdfc->corr_mode == ISIF_VDFC_NORMAL ||
		    vdfc->corr_mode == ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
			regw(vdfc->table[i].level_at_pos, DFCMEM2);
			regw(vdfc->table[i].level_up_pixels, DFCMEM3);
			regw(vdfc->table[i].level_low_pixels, DFCMEM4);
		}
		val = regr(DFCMEMCTL);
		/* clear DFCMARST and set DFCMWR */
		val &= ~BIT(ISIF_DFCMEMCTL_DFCMARST_SHIFT);
		val |= 1;
		regw(val, DFCMEMCTL);

		count = retries;
		while (count && (regr(DFCMEMCTL) & 0x1))
			count--;

		if (!count) {
			dev_err(isif_cfg.dev,
				"defect table write timeout !!!\n");
			return -1;
		}
	}
	if (vdfc->num_vdefects < ISIF_VDFC_TABLE_SIZE) {
		/* Extra cycle needed */
		regw(0, DFCMEM0);
		regw(0x1FFF, DFCMEM1);
		regw(1, DFCMEMCTL);
	}

	/* enable VDFC */
	reg_modify((1 << ISIF_VDFC_EN_SHIFT), (1 << ISIF_VDFC_EN_SHIFT),
		   DFCCTL);
	return 0;
}

static void isif_config_csc(struct isif_df_csc *df_csc)
{
	u32 val1 = 0, val2 = 0, i;

	if (!df_csc->csc.en) {
		regw(0, CSCCTL);
		return;
	}
	for (i = 0; i < ISIF_CSC_NUM_COEFF; i++) {
		if ((i % 2) == 0) {
			/* CSCM - LSB */
			val1 = (df_csc->csc.coeff[i].integer <<
				ISIF_CSC_COEF_INTEG_SHIFT) |
				df_csc->csc.coeff[i].decimal;
		} else {

			/* CSCM - MSB */
			val2 = (df_csc->csc.coeff[i].integer <<
				ISIF_CSC_COEF_INTEG_SHIFT) |
				df_csc->csc.coeff[i].decimal;
			val2 <<= ISIF_CSCM_MSB_SHIFT;
			val2 |= val1;
			regw(val2, (CSCM0 + ((i - 1) << 1)));
		}
	}

	/* program the active area */
	regw(df_csc->start_pix, FMTSPH);
	/*
	 * one extra pixel as required for CSC. Actually number of
	 * pixel - 1 should be configured in this register. So we
	 * need to subtract 1 before writing to FMTSPH, but we will
	 * not do this since csc requires one extra pixel
	 */
	regw(df_csc->num_pixels, FMTLNH);
	regw(df_csc->start_line, FMTSLV);
	/*
	 * one extra line as required for CSC. See reason documented for
	 * num_pixels
	 */
	regw(df_csc->num_lines, FMTLNV);

	/* Enable CSC */
	regw(1, CSCCTL);
}

static int isif_config_raw(void)
{
	struct isif_params_raw *params = &isif_cfg.bayer;
	struct isif_config_params_raw *module_params =
		&isif_cfg.bayer.config_params;
	struct vpss_pg_frame_size frame_size;
	struct vpss_sync_pol sync;
	u32 val;

	dev_dbg(isif_cfg.dev, "\nStarting isif_config_raw..\n");

	/*
	 * Configure CCDCFG register:-
	 * Set CCD Not to swap input since input is RAW data
	 * Set FID detection function to Latch at V-Sync
	 * Set WENLOG - isif valid area
	 * Set TRGSEL
	 * Set EXTRG
	 * Packed to 8 or 16 bits
	 */

	val = ISIF_YCINSWP_RAW | ISIF_CCDCFG_FIDMD_LATCH_VSYNC |
		ISIF_CCDCFG_WENLOG_AND | ISIF_CCDCFG_TRGSEL_WEN |
		ISIF_CCDCFG_EXTRG_DISABLE | isif_cfg.data_pack;

	dev_dbg(isif_cfg.dev, "Writing 0x%x to ...CCDCFG \n", val);
	regw(val, CCDCFG);

	/*
	 * Configure the vertical sync polarity(MODESET.VDPOL)
	 * Configure the horizontal sync polarity (MODESET.HDPOL)
	 * Configure frame id polarity (MODESET.FLDPOL)
	 * Configure data polarity
	 * Configure External WEN Selection
	 * Configure frame format(progressive or interlace)
	 * Configure pixel format (Input mode)
	 * Configure the data shift
	 */

	val = ISIF_VDHDOUT_INPUT | (params->vd_pol << ISIF_VD_POL_SHIFT) |
		(params->hd_pol << ISIF_HD_POL_SHIFT) |
		(params->fid_pol << ISIF_FID_POL_SHIFT) |
		(ISIF_DATAPOL_NORMAL << ISIF_DATAPOL_SHIFT) |
		(ISIF_EXWEN_DISABLE << ISIF_EXWEN_SHIFT) |
		(params->frm_fmt << ISIF_FRM_FMT_SHIFT) |
		(params->pix_fmt << ISIF_INPUT_SHIFT) |
		(params->config_params.data_shift << ISIF_DATASFT_SHIFT);

	regw(val, MODESET);
	dev_dbg(isif_cfg.dev, "Writing 0x%x to MODESET...\n", val);

	/*
	 * Configure GAMMAWD register
	 * CFA pattern setting
	 */
	val = params->cfa_pat << ISIF_GAMMAWD_CFA_SHIFT;

	/* Gamma msb */
	if (module_params->compress.alg == ISIF_ALAW)
		val |= ISIF_ALAW_ENABLE;

	val |= (params->data_msb << ISIF_ALAW_GAMA_WD_SHIFT);
	regw(val, CGAMMAWD);

	/* Configure DPCM compression settings */
	if (module_params->compress.alg == ISIF_DPCM) {
		val =  BIT(ISIF_DPCM_EN_SHIFT) |
		       (module_params->compress.pred <<
		       ISIF_DPCM_PREDICTOR_SHIFT);
	}

	regw(val, MISC);

	/* Configure Gain & Offset */
	isif_config_gain_offset();

	/* Configure Color pattern */
	val = (params->config_params.col_pat_field0.olop) |
	      (params->config_params.col_pat_field0.olep << 2) |
	      (params->config_params.col_pat_field0.elop << 4) |
	      (params->config_params.col_pat_field0.elep << 6) |
	      (params->config_params.col_pat_field1.olop << 8) |
	      (params->config_params.col_pat_field1.olep << 10) |
	      (params->config_params.col_pat_field1.elop << 12) |
	      (params->config_params.col_pat_field1.elep << 14);
	regw(val, CCOLP);
	dev_dbg(isif_cfg.dev, "Writing %x to CCOLP ...\n", val);

	/* Configure HSIZE register  */
	val = (!!params->horz_flip_en) << ISIF_HSIZE_FLIP_SHIFT;

	/* calculate line offset in 32 bytes based on pack value */
	if (isif_cfg.data_pack == ISIF_PACK_8BIT)
		val |= ((params->win.width + 31) >> 5);
	else if (isif_cfg.data_pack == ISIF_PACK_12BIT)
		val |= (((params->win.width +
		       (params->win.width >> 2)) + 31) >> 5);
	else
		val |= (((params->win.width * 2) + 31) >> 5);
	regw(val, HSIZE);

	/* Configure SDOFST register  */
	if (params->frm_fmt == CCDC_FRMFMT_INTERLACED) {
		if (params->image_invert_en) {
			/* For interlace inverse mode */
			regw(0x4B6D, SDOFST);
			dev_dbg(isif_cfg.dev, "Writing 0x4B6D to SDOFST...\n");
		} else {
			/* For interlace non inverse mode */
			regw(0x0B6D, SDOFST);
			dev_dbg(isif_cfg.dev, "Writing 0x0B6D to SDOFST...\n");
		}
	} else if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
		if (params->image_invert_en) {
			/* For progressive inverse mode */
			regw(0x4000, SDOFST);
			dev_dbg(isif_cfg.dev, "Writing 0x4000 to SDOFST...\n");
		} else {
			/* For progressive non inverse mode */
			regw(0x0000, SDOFST);
			dev_dbg(isif_cfg.dev, "Writing 0x0000 to SDOFST...\n");
		}
	}

	/* Configure video window */
	isif_setwin(&params->win, params->frm_fmt, 1);

	/* Configure Black Clamp */
	isif_config_bclamp(&module_params->bclamp);

	/* Configure Vertical Defection Pixel Correction */
	if (isif_config_dfc(&module_params->dfc) < 0)
		return -EFAULT;

	if (!module_params->df_csc.df_or_csc)
		/* Configure Color Space Conversion */
		isif_config_csc(&module_params->df_csc);

	isif_config_linearization(&module_params->linearize);

	/* Configure Culling */
	isif_config_culling(&module_params->culling);

	/* Configure horizontal and vertical offsets(DFC,LSC,Gain) */
	regw(module_params->horz_offset, DATAHOFST);
	regw(module_params->vert_offset, DATAVOFST);

	/* Setup test pattern if enabled */
	if (params->config_params.test_pat_gen) {
		/* Use the HD/VD pol settings from user */
		sync.ccdpg_hdpol = params->hd_pol;
		sync.ccdpg_vdpol = params->vd_pol;
		dm365_vpss_set_sync_pol(sync);
		frame_size.hlpfr = isif_cfg.bayer.win.width;
		frame_size.pplen = isif_cfg.bayer.win.height;
		dm365_vpss_set_pg_frame_size(frame_size);
		vpss_select_ccdc_source(VPSS_PGLPBK);
	}

	dev_dbg(isif_cfg.dev, "\nEnd of isif_config_ycbcr...\n");
	return 0;
}

static int isif_set_buftype(enum ccdc_buftype buf_type)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		isif_cfg.bayer.buf_type = buf_type;
	else
		isif_cfg.ycbcr.buf_type = buf_type;

	return 0;

}
static enum ccdc_buftype isif_get_buftype(void)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		return isif_cfg.bayer.buf_type;

	return isif_cfg.ycbcr.buf_type;
}

static int isif_enum_pix(u32 *pix, int i)
{
	int ret = -EINVAL;

	if (isif_cfg.if_type == VPFE_RAW_BAYER) {
		if (i < ARRAY_SIZE(isif_raw_bayer_pix_formats)) {
			*pix = isif_raw_bayer_pix_formats[i];
			ret = 0;
		}
	} else {
		if (i < ARRAY_SIZE(isif_raw_yuv_pix_formats)) {
			*pix = isif_raw_yuv_pix_formats[i];
			ret = 0;
		}
	}

	return ret;
}

static int isif_set_pixel_format(unsigned int pixfmt)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER) {
		if (pixfmt == V4L2_PIX_FMT_SBGGR8) {
			if ((isif_cfg.bayer.config_params.compress.alg !=
			     ISIF_ALAW) &&
			    (isif_cfg.bayer.config_params.compress.alg !=
			     ISIF_DPCM)) {
				dev_dbg(isif_cfg.dev,
					"Either configure A-Law or DPCM\n");
				return -EINVAL;
			}
			isif_cfg.data_pack = ISIF_PACK_8BIT;
		} else if (pixfmt == V4L2_PIX_FMT_SBGGR16) {
			isif_cfg.bayer.config_params.compress.alg =
					ISIF_NO_COMPRESSION;
			isif_cfg.data_pack = ISIF_PACK_16BIT;
		} else
			return -EINVAL;
		isif_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
	} else {
		if (pixfmt == V4L2_PIX_FMT_YUYV)
			isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_YCBYCR;
		else if (pixfmt == V4L2_PIX_FMT_UYVY)
			isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
		else
			return -EINVAL;
		isif_cfg.data_pack = ISIF_PACK_8BIT;
	}
	return 0;
}

static u32 isif_get_pixel_format(void)
{
	u32 pixfmt;

	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		if (isif_cfg.bayer.config_params.compress.alg == ISIF_ALAW ||
		    isif_cfg.bayer.config_params.compress.alg == ISIF_DPCM)
			pixfmt = V4L2_PIX_FMT_SBGGR8;
		else
			pixfmt = V4L2_PIX_FMT_SBGGR16;
	else {
		if (isif_cfg.ycbcr.pix_order == CCDC_PIXORDER_YCBYCR)
			pixfmt = V4L2_PIX_FMT_YUYV;
		else
			pixfmt = V4L2_PIX_FMT_UYVY;
	}
	return pixfmt;
}

static int isif_set_image_window(struct v4l2_rect *win)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER) {
		isif_cfg.bayer.win.top = win->top;
		isif_cfg.bayer.win.left = win->left;
		isif_cfg.bayer.win.width = win->width;
		isif_cfg.bayer.win.height = win->height;
	} else {
		isif_cfg.ycbcr.win.top = win->top;
		isif_cfg.ycbcr.win.left = win->left;
		isif_cfg.ycbcr.win.width = win->width;
		isif_cfg.ycbcr.win.height = win->height;
	}
	return 0;
}

static void isif_get_image_window(struct v4l2_rect *win)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		*win = isif_cfg.bayer.win;
	else
		*win = isif_cfg.ycbcr.win;
}

static unsigned int isif_get_line_length(void)
{
	unsigned int len;

	if (isif_cfg.if_type == VPFE_RAW_BAYER) {
		if (isif_cfg.data_pack == ISIF_PACK_8BIT)
			len = ((isif_cfg.bayer.win.width));
		else if (isif_cfg.data_pack == ISIF_PACK_12BIT)
			len = (((isif_cfg.bayer.win.width * 2) +
				 (isif_cfg.bayer.win.width >> 2)));
		else
			len = (((isif_cfg.bayer.win.width * 2)));
	} else
		len = (((isif_cfg.ycbcr.win.width * 2)));
	return ALIGN(len, 32);
}

static int isif_set_frame_format(enum ccdc_frmfmt frm_fmt)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		isif_cfg.bayer.frm_fmt = frm_fmt;
	else
		isif_cfg.ycbcr.frm_fmt = frm_fmt;
	return 0;
}
static enum ccdc_frmfmt isif_get_frame_format(void)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		return isif_cfg.bayer.frm_fmt;
	return isif_cfg.ycbcr.frm_fmt;
}

static int isif_getfid(void)
{
	return (regr(MODESET) >> 15) & 0x1;
}

/* misc operations */
static void isif_setfbaddr(unsigned long addr)
{
	regw((addr >> 21) & 0x07ff, CADU);
	regw((addr >> 5) & 0x0ffff, CADL);
}

static int isif_set_hw_if_params(struct vpfe_hw_if_param *params)
{
	isif_cfg.if_type = params->if_type;

	switch (params->if_type) {
	case VPFE_BT656:
	case VPFE_BT656_10BIT:
	case VPFE_YCBCR_SYNC_8:
		isif_cfg.ycbcr.pix_fmt = CCDC_PIXFMT_YCBCR_8BIT;
		isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
		break;
	case VPFE_BT1120:
	case VPFE_YCBCR_SYNC_16:
		isif_cfg.ycbcr.pix_fmt = CCDC_PIXFMT_YCBCR_16BIT;
		isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
		break;
	case VPFE_RAW_BAYER:
		isif_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
		break;
	default:
		dev_dbg(isif_cfg.dev, "Invalid interface type\n");
		return -EINVAL;
	}

	return 0;
}

/* This function will configure ISIF for YCbCr parameters. */
static int isif_config_ycbcr(void)
{
	struct isif_ycbcr_config *params = &isif_cfg.ycbcr;
	struct vpss_pg_frame_size frame_size;
	u32 modeset = 0, ccdcfg = 0;
	struct vpss_sync_pol sync;

	dev_dbg(isif_cfg.dev, "\nStarting isif_config_ycbcr...");

	/* configure pixel format or input mode */
	modeset = modeset | (params->pix_fmt << ISIF_INPUT_SHIFT) |
		  (params->frm_fmt << ISIF_FRM_FMT_SHIFT) |
		  (params->fid_pol << ISIF_FID_POL_SHIFT) |
		  (params->hd_pol << ISIF_HD_POL_SHIFT) |
		  (params->vd_pol << ISIF_VD_POL_SHIFT);

	/* pack the data to 8-bit ISIFCFG */
	switch (isif_cfg.if_type) {
	case VPFE_BT656:
		if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
			dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
			return -EINVAL;
		}
		modeset |= (VPFE_PINPOL_NEGATIVE << ISIF_VD_POL_SHIFT);
		regw(3, REC656IF);
		ccdcfg = ccdcfg | ISIF_DATA_PACK8 | ISIF_YCINSWP_YCBCR;
		break;
	case VPFE_BT656_10BIT:
		if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
			dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
			return -EINVAL;
		}
		/* setup BT.656, embedded sync  */
		regw(3, REC656IF);
		/* enable 10 bit mode in ccdcfg */
		ccdcfg = ccdcfg | ISIF_DATA_PACK8 | ISIF_YCINSWP_YCBCR |
			ISIF_BW656_ENABLE;
		break;
	case VPFE_BT1120:
		if (params->pix_fmt != CCDC_PIXFMT_YCBCR_16BIT) {
			dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
			return -EINVAL;
		}
		regw(3, REC656IF);
		break;

	case VPFE_YCBCR_SYNC_8:
		ccdcfg |= ISIF_DATA_PACK8;
		ccdcfg |= ISIF_YCINSWP_YCBCR;
		if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
			dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
			return -EINVAL;
		}
		break;
	case VPFE_YCBCR_SYNC_16:
		if (params->pix_fmt != CCDC_PIXFMT_YCBCR_16BIT) {
			dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
			return -EINVAL;
		}
		break;
	default:
		/* should never come here */
		dev_dbg(isif_cfg.dev, "Invalid interface type\n");
		return -EINVAL;
	}

	regw(modeset, MODESET);

	/* Set up pix order */
	ccdcfg |= params->pix_order << ISIF_PIX_ORDER_SHIFT;

	regw(ccdcfg, CCDCFG);

	/* configure video window */
	if ((isif_cfg.if_type == VPFE_BT1120) ||
	    (isif_cfg.if_type == VPFE_YCBCR_SYNC_16))
		isif_setwin(&params->win, params->frm_fmt, 1);
	else
		isif_setwin(&params->win, params->frm_fmt, 2);

	/*
	 * configure the horizontal line offset
	 * this is done by rounding up width to a multiple of 16 pixels
	 * and multiply by two to account for y:cb:cr 4:2:2 data
	 */
	regw(((((params->win.width * 2) + 31) & 0xffffffe0) >> 5), HSIZE);

	/* configure the memory line offset */
	if ((params->frm_fmt == CCDC_FRMFMT_INTERLACED) &&
	    (params->buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED))
		/* two fields are interleaved in memory */
		regw(0x00000249, SDOFST);

	/* Setup test pattern if enabled */
	if (isif_cfg.bayer.config_params.test_pat_gen) {
		sync.ccdpg_hdpol = params->hd_pol;
		sync.ccdpg_vdpol = params->vd_pol;
		dm365_vpss_set_sync_pol(sync);
		dm365_vpss_set_pg_frame_size(frame_size);
	}
	return 0;
}

static int isif_configure(void)
{
	if (isif_cfg.if_type == VPFE_RAW_BAYER)
		return isif_config_raw();
	return isif_config_ycbcr();
}

static int isif_close(struct device *device)
{
	/* copy defaults to module params */
	isif_cfg.bayer.config_params = isif_config_defaults;
	return 0;
}

static struct ccdc_hw_device isif_hw_dev = {
	.name = "ISIF",
	.owner = THIS_MODULE,
	.hw_ops = {
		.open = isif_open,
		.close = isif_close,
		.enable = isif_enable,
		.enable_out_to_sdram = isif_enable_output_to_sdram,
		.set_hw_if_params = isif_set_hw_if_params,
		.configure = isif_configure,
		.set_buftype = isif_set_buftype,
		.get_buftype = isif_get_buftype,
		.enum_pix = isif_enum_pix,
		.set_pixel_format = isif_set_pixel_format,
		.get_pixel_format = isif_get_pixel_format,
		.set_frame_format = isif_set_frame_format,
		.get_frame_format = isif_get_frame_format,
		.set_image_window = isif_set_image_window,
		.get_image_window = isif_get_image_window,
		.get_line_length = isif_get_line_length,
		.setfbaddr = isif_setfbaddr,
		.getfid = isif_getfid,
	},
};

static int __devinit isif_probe(struct platform_device *pdev)
{
	void (*setup_pinmux)(void);
	struct resource	*res;
	void *__iomem addr;
	int status = 0, i;

	/*
	 * first try to register with vpfe. If not correct platform, then we
	 * don't have to iomap
	 */
	status = vpfe_register_ccdc_device(&isif_hw_dev);
	if (status < 0)
		return status;

	/* Get and enable Master clock */
	isif_cfg.mclk = clk_get(&pdev->dev, "master");
	if (IS_ERR(isif_cfg.mclk)) {
		status = PTR_ERR(isif_cfg.mclk);
		goto fail_mclk;
	}
	if (clk_enable(isif_cfg.mclk)) {
		status = -ENODEV;
		goto fail_mclk;
	}

	/* Platform data holds setup_pinmux function ptr */
	if (NULL == pdev->dev.platform_data) {
		status = -ENODEV;
		goto fail_mclk;
	}
	setup_pinmux = pdev->dev.platform_data;
	/*
	 * setup Mux configuration for ccdc which may be different for
	 * different SoCs using this CCDC
	 */
	setup_pinmux();

	i = 0;
	/* Get the ISIF base address, linearization table0 and table1 addr. */
	while (i < 3) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
		if (!res) {
			status = -ENODEV;
			goto fail_nobase_res;
		}
		res = request_mem_region(res->start, resource_size(res),
					 res->name);
		if (!res) {
			status = -EBUSY;
			goto fail_nobase_res;
		}
		addr = ioremap_nocache(res->start, resource_size(res));
		if (!addr) {
			status = -ENOMEM;
			goto fail_base_iomap;
		}
		switch (i) {
		case 0:
			/* ISIF base address */
			isif_cfg.base_addr = addr;
			break;
		case 1:
			/* ISIF linear tbl0 address */
			isif_cfg.linear_tbl0_addr = addr;
			break;
		default:
			/* ISIF linear tbl0 address */
			isif_cfg.linear_tbl1_addr = addr;
			break;
		}
		i++;
	}
	isif_cfg.dev = &pdev->dev;

	printk(KERN_NOTICE "%s is registered with vpfe.\n",
		isif_hw_dev.name);
	return 0;
fail_base_iomap:
	release_mem_region(res->start, resource_size(res));
	i--;
fail_nobase_res:
	if (isif_cfg.base_addr)
		iounmap(isif_cfg.base_addr);
	if (isif_cfg.linear_tbl0_addr)
		iounmap(isif_cfg.linear_tbl0_addr);

	while (i >= 0) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
		release_mem_region(res->start, resource_size(res));
		i--;
	}
fail_mclk:
	clk_put(isif_cfg.mclk);
	vpfe_unregister_ccdc_device(&isif_hw_dev);
	return status;
}

static int isif_remove(struct platform_device *pdev)
{
	struct resource	*res;
	int i = 0;

	iounmap(isif_cfg.base_addr);
	iounmap(isif_cfg.linear_tbl0_addr);
	iounmap(isif_cfg.linear_tbl1_addr);
	while (i < 3) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
		if (res)
			release_mem_region(res->start, resource_size(res));
		i++;
	}
	vpfe_unregister_ccdc_device(&isif_hw_dev);
	return 0;
}

static struct platform_driver isif_driver = {
	.driver = {
		.name	= "isif",
		.owner = THIS_MODULE,
	},
	.remove = __devexit_p(isif_remove),
	.probe = isif_probe,
};

module_platform_driver(isif_driver);

MODULE_LICENSE("GPL");