aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/fsl-viu.c
blob: 3a6a0dcdc3e426390fa2b9ff2ab9edbcc9c47b0d (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
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
/*
 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 *  Freescale VIU video driver
 *
 *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
 *	     Porting to 2.6.35 by DENX Software Engineering,
 *	     Anatolij Gustschin <agust@denx.de>
 *
 * 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/clk.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf-dma-contig.h>

#define DRV_NAME		"fsl_viu"
#define VIU_VERSION		"0.5.1"

#define BUFFER_TIMEOUT		msecs_to_jiffies(500)  /* 0.5 seconds */

#define	VIU_VID_MEM_LIMIT	4	/* Video memory limit, in Mb */

/* I2C address of video decoder chip is 0x4A */
#define VIU_VIDEO_DECODER_ADDR	0x25

/* supported controls */
static struct v4l2_queryctrl viu_qctrl[] = {
	{
		.id            = V4L2_CID_BRIGHTNESS,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Brightness",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 127,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_CONTRAST,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Contrast",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 0x1,
		.default_value = 0x10,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_SATURATION,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Saturation",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 0x1,
		.default_value = 127,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_HUE,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Hue",
		.minimum       = -128,
		.maximum       = 127,
		.step          = 0x1,
		.default_value = 0,
		.flags         = 0,
	}
};

static int qctl_regs[ARRAY_SIZE(viu_qctrl)];

static int info_level;

#define dprintk(level, fmt, arg...)					\
	do {								\
		if (level <= info_level)				\
			printk(KERN_DEBUG "viu: " fmt , ## arg);	\
	} while (0)

/*
 * Basic structures
 */
struct viu_fmt {
	char  name[32];
	u32   fourcc;		/* v4l2 format id */
	u32   pixelformat;
	int   depth;
};

static struct viu_fmt formats[] = {
	{
		.name		= "RGB-16 (5/B-6/G-5/R)",
		.fourcc		= V4L2_PIX_FMT_RGB565,
		.pixelformat	= V4L2_PIX_FMT_RGB565,
		.depth		= 16,
	}, {
		.name		= "RGB-32 (A-R-G-B)",
		.fourcc		= V4L2_PIX_FMT_RGB32,
		.pixelformat	= V4L2_PIX_FMT_RGB32,
		.depth		= 32,
	}
};

struct viu_dev;
struct viu_buf;

/* buffer for one video frame */
struct viu_buf {
	/* common v4l buffer stuff -- must be first */
	struct videobuf_buffer vb;
	struct viu_fmt *fmt;
};

struct viu_dmaqueue {
	struct viu_dev		*dev;
	struct list_head	active;
	struct list_head	queued;
	struct timer_list	timeout;
};

struct viu_status {
	u32 field_irq;
	u32 vsync_irq;
	u32 hsync_irq;
	u32 vstart_irq;
	u32 dma_end_irq;
	u32 error_irq;
};

struct viu_reg {
	u32 status_cfg;
	u32 luminance;
	u32 chroma_r;
	u32 chroma_g;
	u32 chroma_b;
	u32 field_base_addr;
	u32 dma_inc;
	u32 picture_count;
	u32 req_alarm;
	u32 alpha;
} __attribute__ ((packed));

struct viu_dev {
	struct v4l2_device	v4l2_dev;
	struct mutex		lock;
	spinlock_t		slock;
	int			users;

	struct device		*dev;
	/* various device info */
	struct video_device	*vdev;
	struct viu_dmaqueue	vidq;
	enum v4l2_field		capfield;
	int			field;
	int			first;
	int			dma_done;

	/* Hardware register area */
	struct viu_reg		*vr;

	/* Interrupt vector */
	int			irq;
	struct viu_status	irqs;

	/* video overlay */
	struct v4l2_framebuffer	ovbuf;
	struct viu_fmt		*ovfmt;
	unsigned int		ovenable;
	enum v4l2_field		ovfield;

	/* crop */
	struct v4l2_rect	crop_current;

	/* clock pointer */
	struct clk		*clk;

	/* decoder */
	struct v4l2_subdev	*decoder;

	v4l2_std_id		std;
};

struct viu_fh {
	struct viu_dev		*dev;

	/* video capture */
	struct videobuf_queue	vb_vidq;
	spinlock_t		vbq_lock; /* spinlock for the videobuf queue */

	/* video overlay */
	struct v4l2_window	win;
	struct v4l2_clip	clips[1];

	/* video capture */
	struct viu_fmt		*fmt;
	int			width, height, sizeimage;
	enum v4l2_buf_type	type;
};

static struct viu_reg reg_val;

/*
 * Macro definitions of VIU registers
 */

/* STATUS_CONFIG register */
enum status_config {
	SOFT_RST		= 1 << 0,

	ERR_MASK		= 0x0f << 4,	/* Error code mask */
	ERR_NO			= 0x00,		/* No error */
	ERR_DMA_V		= 0x01 << 4,	/* DMA in vertical active */
	ERR_DMA_VB		= 0x02 << 4,	/* DMA in vertical blanking */
	ERR_LINE_TOO_LONG	= 0x04 << 4,	/* Line too long */
	ERR_TOO_MANG_LINES	= 0x05 << 4,	/* Too many lines in field */
	ERR_LINE_TOO_SHORT	= 0x06 << 4,	/* Line too short */
	ERR_NOT_ENOUGH_LINE	= 0x07 << 4,	/* Not enough lines in field */
	ERR_FIFO_OVERFLOW	= 0x08 << 4,	/* FIFO overflow */
	ERR_FIFO_UNDERFLOW	= 0x09 << 4,	/* FIFO underflow */
	ERR_1bit_ECC		= 0x0a << 4,	/* One bit ECC error */
	ERR_MORE_ECC		= 0x0b << 4,	/* Two/more bits ECC error */

	INT_FIELD_EN		= 0x01 << 8,	/* Enable field interrupt */
	INT_VSYNC_EN		= 0x01 << 9,	/* Enable vsync interrupt */
	INT_HSYNC_EN		= 0x01 << 10,	/* Enable hsync interrupt */
	INT_VSTART_EN		= 0x01 << 11,	/* Enable vstart interrupt */
	INT_DMA_END_EN		= 0x01 << 12,	/* Enable DMA end interrupt */
	INT_ERROR_EN		= 0x01 << 13,	/* Enable error interrupt */
	INT_ECC_EN		= 0x01 << 14,	/* Enable ECC interrupt */

	INT_FIELD_STATUS	= 0x01 << 16,	/* field interrupt status */
	INT_VSYNC_STATUS	= 0x01 << 17,	/* vsync interrupt status */
	INT_HSYNC_STATUS	= 0x01 << 18,	/* hsync interrupt status */
	INT_VSTART_STATUS	= 0x01 << 19,	/* vstart interrupt status */
	INT_DMA_END_STATUS	= 0x01 << 20,	/* DMA end interrupt status */
	INT_ERROR_STATUS	= 0x01 << 21,	/* error interrupt status */

	DMA_ACT			= 0x01 << 27,	/* Enable DMA transfer */
	FIELD_NO		= 0x01 << 28,	/* Field number */
	DITHER_ON		= 0x01 << 29,	/* Dithering is on */
	ROUND_ON		= 0x01 << 30,	/* Round is on */
	MODE_32BIT		= 0x01 << 31,	/* Data in RGBa888,
						 * 0 in RGB565
						 */
};

#define norm_maxw()	720
#define norm_maxh()	576

#define INT_ALL_STATUS	(INT_FIELD_STATUS | INT_VSYNC_STATUS | \
			 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
			 INT_DMA_END_STATUS | INT_ERROR_STATUS)

#define NUM_FORMATS	ARRAY_SIZE(formats)

static irqreturn_t viu_intr(int irq, void *dev_id);

struct viu_fmt *format_by_fourcc(int fourcc)
{
	int i;

	for (i = 0; i < NUM_FORMATS; i++) {
		if (formats[i].pixelformat == fourcc)
			return formats + i;
	}

	dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
	return NULL;
}

void viu_start_dma(struct viu_dev *dev)
{
	struct viu_reg *vr = dev->vr;

	dev->field = 0;

	/* Enable DMA operation */
	out_be32(&vr->status_cfg, SOFT_RST);
	out_be32(&vr->status_cfg, INT_FIELD_EN);
}

void viu_stop_dma(struct viu_dev *dev)
{
	struct viu_reg *vr = dev->vr;
	int cnt = 100;
	u32 status_cfg;

	out_be32(&vr->status_cfg, 0);

	/* Clear pending interrupts */
	status_cfg = in_be32(&vr->status_cfg);
	if (status_cfg & 0x3f0000)
		out_be32(&vr->status_cfg, status_cfg & 0x3f0000);

	if (status_cfg & DMA_ACT) {
		do {
			status_cfg = in_be32(&vr->status_cfg);
			if (status_cfg & INT_DMA_END_STATUS)
				break;
		} while (cnt--);

		if (cnt < 0) {
			/* timed out, issue soft reset */
			out_be32(&vr->status_cfg, SOFT_RST);
			out_be32(&vr->status_cfg, 0);
		} else {
			/* clear DMA_END and other pending irqs */
			out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
		}
	}

	dev->field = 0;
}

static int restart_video_queue(struct viu_dmaqueue *vidq)
{
	struct viu_buf *buf, *prev;

	dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
	if (!list_empty(&vidq->active)) {
		buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
		dprintk(2, "restart_queue [%p/%d]: restart dma\n",
			buf, buf->vb.i);

		viu_stop_dma(vidq->dev);

		/* cancel all outstanding capture requests */
		list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
			list_del(&buf->vb.queue);
			buf->vb.state = VIDEOBUF_ERROR;
			wake_up(&buf->vb.done);
		}
		mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
		return 0;
	}

	prev = NULL;
	for (;;) {
		if (list_empty(&vidq->queued))
			return 0;
		buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
		if (prev == NULL) {
			list_move_tail(&buf->vb.queue, &vidq->active);

			dprintk(1, "Restarting video dma\n");
			viu_stop_dma(vidq->dev);
			viu_start_dma(vidq->dev);

			buf->vb.state = VIDEOBUF_ACTIVE;
			mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
			dprintk(2, "[%p/%d] restart_queue - first active\n",
				buf, buf->vb.i);

		} else if (prev->vb.width  == buf->vb.width  &&
			   prev->vb.height == buf->vb.height &&
			   prev->fmt       == buf->fmt) {
			list_move_tail(&buf->vb.queue, &vidq->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			dprintk(2, "[%p/%d] restart_queue - move to active\n",
				buf, buf->vb.i);
		} else {
			return 0;
		}
		prev = buf;
	}
}

static void viu_vid_timeout(unsigned long data)
{
	struct viu_dev *dev = (struct viu_dev *)data;
	struct viu_buf *buf;
	struct viu_dmaqueue *vidq = &dev->vidq;

	while (!list_empty(&vidq->active)) {
		buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
		list_del(&buf->vb.queue);
		buf->vb.state = VIDEOBUF_ERROR;
		wake_up(&buf->vb.done);
		dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
	}

	restart_video_queue(vidq);
}

/*
 * Videobuf operations
 */
static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
			unsigned int *size)
{
	struct viu_fh *fh = vq->priv_data;

	*size = fh->width * fh->height * fh->fmt->depth >> 3;
	if (*count == 0)
		*count = 32;

	while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
		(*count)--;

	dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
	return 0;
}

static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
{
	struct videobuf_buffer *vb = &buf->vb;
	void *vaddr = NULL;

	BUG_ON(in_interrupt());

	videobuf_waiton(vq, &buf->vb, 0, 0);

	if (vq->int_ops && vq->int_ops->vaddr)
		vaddr = vq->int_ops->vaddr(vb);

	if (vaddr)
		videobuf_dma_contig_free(vq, &buf->vb);

	buf->vb.state = VIDEOBUF_NEEDS_INIT;
}

inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
{
	struct viu_reg *vr = dev->vr;
	int bpp;

	/* setup the DMA base address */
	reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);

	dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
		buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);

	/* interlace is on by default, set horizontal DMA increment */
	reg_val.status_cfg = 0;
	bpp = buf->fmt->depth >> 3;
	switch (bpp) {
	case 2:
		reg_val.status_cfg &= ~MODE_32BIT;
		reg_val.dma_inc = buf->vb.width * 2;
		break;
	case 4:
		reg_val.status_cfg |= MODE_32BIT;
		reg_val.dma_inc = buf->vb.width * 4;
		break;
	default:
		dprintk(0, "doesn't support color depth(%d)\n",
			bpp * 8);
		return -EINVAL;
	}

	/* setup picture_count register */
	reg_val.picture_count = (buf->vb.height / 2) << 16 |
				buf->vb.width;

	reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;

	buf->vb.state = VIDEOBUF_ACTIVE;
	dev->capfield = buf->vb.field;

	/* reset dma increment if needed */
	if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
		reg_val.dma_inc = 0;

	out_be32(&vr->dma_inc, reg_val.dma_inc);
	out_be32(&vr->picture_count, reg_val.picture_count);
	out_be32(&vr->field_base_addr, reg_val.field_base_addr);
	mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
	return 0;
}

static int buffer_prepare(struct videobuf_queue *vq,
			  struct videobuf_buffer *vb,
			  enum v4l2_field field)
{
	struct viu_fh  *fh  = vq->priv_data;
	struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
	int rc;

	BUG_ON(fh->fmt == NULL);

	if (fh->width  < 48 || fh->width  > norm_maxw() ||
	    fh->height < 32 || fh->height > norm_maxh())
		return -EINVAL;
	buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
	if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
		return -EINVAL;

	if (buf->fmt       != fh->fmt	 ||
	    buf->vb.width  != fh->width  ||
	    buf->vb.height != fh->height ||
	    buf->vb.field  != field) {
		buf->fmt       = fh->fmt;
		buf->vb.width  = fh->width;
		buf->vb.height = fh->height;
		buf->vb.field  = field;
	}

	if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
		rc = videobuf_iolock(vq, &buf->vb, NULL);
		if (rc != 0)
			goto fail;

		buf->vb.width  = fh->width;
		buf->vb.height = fh->height;
		buf->vb.field  = field;
		buf->fmt       = fh->fmt;
	}

	buf->vb.state = VIDEOBUF_PREPARED;
	return 0;

fail:
	free_buffer(vq, buf);
	return rc;
}

static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
	struct viu_fh        *fh      = vq->priv_data;
	struct viu_dev       *dev     = fh->dev;
	struct viu_dmaqueue  *vidq    = &dev->vidq;
	struct viu_buf       *prev;

	if (!list_empty(&vidq->queued)) {
		dprintk(1, "adding vb queue=0x%08lx\n",
				(unsigned long)&buf->vb.queue);
		dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
				vidq, &vidq->queued);
		dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
			dev, &vidq->queued, vidq->queued.next,
			vidq->queued.prev);
		list_add_tail(&buf->vb.queue, &vidq->queued);
		buf->vb.state = VIDEOBUF_QUEUED;
		dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
			buf, buf->vb.i);
	} else if (list_empty(&vidq->active)) {
		dprintk(1, "adding vb active=0x%08lx\n",
				(unsigned long)&buf->vb.queue);
		list_add_tail(&buf->vb.queue, &vidq->active);
		buf->vb.state = VIDEOBUF_ACTIVE;
		mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(2, "[%p/%d] buffer_queue - first active\n",
			buf, buf->vb.i);

		buffer_activate(dev, buf);
	} else {
		dprintk(1, "adding vb queue2=0x%08lx\n",
				(unsigned long)&buf->vb.queue);
		prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
		if (prev->vb.width  == buf->vb.width  &&
		    prev->vb.height == buf->vb.height &&
		    prev->fmt       == buf->fmt) {
			list_add_tail(&buf->vb.queue, &vidq->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			dprintk(2, "[%p/%d] buffer_queue - append to active\n",
				buf, buf->vb.i);
		} else {
			list_add_tail(&buf->vb.queue, &vidq->queued);
			buf->vb.state = VIDEOBUF_QUEUED;
			dprintk(2, "[%p/%d] buffer_queue - first queued\n",
				buf, buf->vb.i);
		}
	}
}

static void buffer_release(struct videobuf_queue *vq,
				struct videobuf_buffer *vb)
{
	struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
	struct viu_fh  *fh   = vq->priv_data;
	struct viu_dev *dev  = (struct viu_dev *)fh->dev;

	viu_stop_dma(dev);
	free_buffer(vq, buf);
}

static struct videobuf_queue_ops viu_video_qops = {
	.buf_setup      = buffer_setup,
	.buf_prepare    = buffer_prepare,
	.buf_queue      = buffer_queue,
	.buf_release    = buffer_release,
};

/*
 * IOCTL vidioc handling
 */
static int vidioc_querycap(struct file *file, void *priv,
			   struct v4l2_capability *cap)
{
	strcpy(cap->driver, "viu");
	strcpy(cap->card, "viu");
	cap->capabilities =	V4L2_CAP_VIDEO_CAPTURE |
				V4L2_CAP_STREAMING     |
				V4L2_CAP_VIDEO_OVERLAY |
				V4L2_CAP_READWRITE;
	return 0;
}

static int vidioc_enum_fmt(struct file *file, void  *priv,
					struct v4l2_fmtdesc *f)
{
	int index = f->index;

	if (f->index > NUM_FORMATS)
		return -EINVAL;

	strlcpy(f->description, formats[index].name, sizeof(f->description));
	f->pixelformat = formats[index].fourcc;
	return 0;
}

static int vidioc_g_fmt_cap(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct viu_fh *fh = priv;

	f->fmt.pix.width        = fh->width;
	f->fmt.pix.height       = fh->height;
	f->fmt.pix.field        = fh->vb_vidq.field;
	f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
	f->fmt.pix.bytesperline =
			(f->fmt.pix.width * fh->fmt->depth) >> 3;
	f->fmt.pix.sizeimage	= fh->sizeimage;
	return 0;
}

static int vidioc_try_fmt_cap(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct viu_fmt *fmt;
	enum v4l2_field field;
	unsigned int maxw, maxh;

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
	if (!fmt) {
		dprintk(1, "Fourcc format (0x%08x) invalid.",
			f->fmt.pix.pixelformat);
		return -EINVAL;
	}

	field = f->fmt.pix.field;

	if (field == V4L2_FIELD_ANY) {
		field = V4L2_FIELD_INTERLACED;
	} else if (field != V4L2_FIELD_INTERLACED) {
		dprintk(1, "Field type invalid.\n");
		return -EINVAL;
	}

	maxw  = norm_maxw();
	maxh  = norm_maxh();

	f->fmt.pix.field = field;
	if (f->fmt.pix.height < 32)
		f->fmt.pix.height = 32;
	if (f->fmt.pix.height > maxh)
		f->fmt.pix.height = maxh;
	if (f->fmt.pix.width < 48)
		f->fmt.pix.width = 48;
	if (f->fmt.pix.width > maxw)
		f->fmt.pix.width = maxw;
	f->fmt.pix.width &= ~0x03;
	f->fmt.pix.bytesperline =
		(f->fmt.pix.width * fmt->depth) >> 3;

	return 0;
}

static int vidioc_s_fmt_cap(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct viu_fh *fh = priv;
	int ret;

	ret = vidioc_try_fmt_cap(file, fh, f);
	if (ret < 0)
		return ret;

	fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
	fh->width         = f->fmt.pix.width;
	fh->height        = f->fmt.pix.height;
	fh->sizeimage     = f->fmt.pix.sizeimage;
	fh->vb_vidq.field = f->fmt.pix.field;
	fh->type          = f->type;
	dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
	return 0;
}

static int vidioc_g_fmt_overlay(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct viu_fh *fh = priv;

	f->fmt.win = fh->win;
	return 0;
}

static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
{
	enum v4l2_field field;
	int maxw, maxh;

	if (dev->ovbuf.base == NULL)
		return -EINVAL;
	if (dev->ovfmt == NULL)
		return -EINVAL;
	if (win->w.width < 48 || win->w.height < 32)
		return -EINVAL;

	field = win->field;
	maxw  = dev->crop_current.width;
	maxh  = dev->crop_current.height;

	if (field == V4L2_FIELD_ANY) {
		field = (win->w.height > maxh/2)
			? V4L2_FIELD_INTERLACED
			: V4L2_FIELD_TOP;
	}
	switch (field) {
	case V4L2_FIELD_TOP:
	case V4L2_FIELD_BOTTOM:
		maxh = maxh / 2;
		break;
	case V4L2_FIELD_INTERLACED:
		break;
	default:
		return -EINVAL;
	}

	win->field = field;
	if (win->w.width > maxw)
		win->w.width = maxw;
	if (win->w.height > maxh)
		win->w.height = maxh;
	return 0;
}

inline void viu_activate_overlay(struct viu_reg *viu_reg)
{
	struct viu_reg *vr = viu_reg;

	out_be32(&vr->field_base_addr, reg_val.field_base_addr);
	out_be32(&vr->dma_inc, reg_val.dma_inc);
	out_be32(&vr->picture_count, reg_val.picture_count);
}

static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
{
	int bpp;

	dprintk(1, "%s %dx%d %s\n", __func__,
		fh->win.w.width, fh->win.w.height, dev->ovfmt->name);

	reg_val.status_cfg = 0;

	/* setup window */
	reg_val.picture_count = (fh->win.w.height / 2) << 16 |
				fh->win.w.width;

	/* setup color depth and dma increment */
	bpp = dev->ovfmt->depth / 8;
	switch (bpp) {
	case 2:
		reg_val.status_cfg &= ~MODE_32BIT;
		reg_val.dma_inc = fh->win.w.width * 2;
		break;
	case 4:
		reg_val.status_cfg |= MODE_32BIT;
		reg_val.dma_inc = fh->win.w.width * 4;
		break;
	default:
		dprintk(0, "device doesn't support color depth(%d)\n",
			bpp * 8);
		return -EINVAL;
	}

	dev->ovfield = fh->win.field;
	if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
		reg_val.dma_inc = 0;

	reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;

	/* setup the base address of the overlay buffer */
	reg_val.field_base_addr = (u32)dev->ovbuf.base;

	return 0;
}

static int vidioc_s_fmt_overlay(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct viu_fh  *fh  = priv;
	struct viu_dev *dev = (struct viu_dev *)fh->dev;
	unsigned long  flags;
	int err;

	err = verify_preview(dev, &f->fmt.win);
	if (err)
		return err;

	fh->win = f->fmt.win;

	spin_lock_irqsave(&dev->slock, flags);
	viu_setup_preview(dev, fh);
	spin_unlock_irqrestore(&dev->slock, flags);
	return 0;
}

static int vidioc_try_fmt_overlay(struct file *file, void *priv,
					struct v4l2_format *f)
{
	return 0;
}

static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
{
	struct viu_fh  *fh  = priv;
	struct viu_dev *dev = (struct viu_dev *)fh->dev;
	unsigned long  flags;

	if (on) {
		spin_lock_irqsave(&dev->slock, flags);
		viu_activate_overlay(dev->vr);
		dev->ovenable = 1;

		/* start dma */
		viu_start_dma(dev);
		spin_unlock_irqrestore(&dev->slock, flags);
	} else {
		viu_stop_dma(dev);
		dev->ovenable = 0;
	}

	return 0;
}

int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
{
	struct viu_fh  *fh = priv;
	struct viu_dev *dev = fh->dev;
	struct v4l2_framebuffer *fb = arg;

	*fb = dev->ovbuf;
	fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
	return 0;
}

int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
{
	struct viu_fh  *fh = priv;
	struct viu_dev *dev = fh->dev;
	const struct v4l2_framebuffer *fb = arg;
	struct viu_fmt *fmt;

	if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
		return -EPERM;

	/* check args */
	fmt = format_by_fourcc(fb->fmt.pixelformat);
	if (fmt == NULL)
		return -EINVAL;

	/* ok, accept it */
	dev->ovbuf = *fb;
	dev->ovfmt = fmt;
	if (dev->ovbuf.fmt.bytesperline == 0) {
		dev->ovbuf.fmt.bytesperline =
			dev->ovbuf.fmt.width * fmt->depth / 8;
	}
	return 0;
}

static int vidioc_reqbufs(struct file *file, void *priv,
				struct v4l2_requestbuffers *p)
{
	struct viu_fh *fh = priv;

	return videobuf_reqbufs(&fh->vb_vidq, p);
}

static int vidioc_querybuf(struct file *file, void *priv,
					struct v4l2_buffer *p)
{
	struct viu_fh *fh = priv;

	return videobuf_querybuf(&fh->vb_vidq, p);
}

static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct viu_fh *fh = priv;

	return videobuf_qbuf(&fh->vb_vidq, p);
}

static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct viu_fh *fh = priv;

	return videobuf_dqbuf(&fh->vb_vidq, p,
				file->f_flags & O_NONBLOCK);
}

static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct viu_fh *fh = priv;
	struct viu_dev *dev = fh->dev;

	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (fh->type != i)
		return -EINVAL;

	if (dev->ovenable)
		dev->ovenable = 0;

	viu_start_dma(fh->dev);

	return videobuf_streamon(&fh->vb_vidq);
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct viu_fh  *fh = priv;

	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (fh->type != i)
		return -EINVAL;

	viu_stop_dma(fh->dev);

	return videobuf_streamoff(&fh->vb_vidq);
}

#define decoder_call(viu, o, f, args...) \
	v4l2_subdev_call(viu->decoder, o, f, ##args)

static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
	struct viu_fh *fh = priv;

	decoder_call(fh->dev, video, querystd, std_id);
	return 0;
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
	struct viu_fh *fh = priv;

	fh->dev->std = id;
	decoder_call(fh->dev, core, s_std, id);
	return 0;
}

static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
	struct viu_fh *fh = priv;

	*std_id = fh->dev->std;
	return 0;
}

/* only one input in this driver */
static int vidioc_enum_input(struct file *file, void *priv,
					struct v4l2_input *inp)
{
	struct viu_fh *fh = priv;

	if (inp->index != 0)
		return -EINVAL;

	inp->type = V4L2_INPUT_TYPE_CAMERA;
	inp->std = fh->dev->vdev->tvnorms;
	strcpy(inp->name, "Camera");
	return 0;
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	*i = 0;
	return 0;
}

static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	struct viu_fh *fh = priv;

	if (i > 1)
		return -EINVAL;

	decoder_call(fh->dev, video, s_routing, i, 0, 0);
	return 0;
}

/* Controls */
static int vidioc_queryctrl(struct file *file, void *priv,
				struct v4l2_queryctrl *qc)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
		if (qc->id && qc->id == viu_qctrl[i].id) {
			memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
			return 0;
		}
	}
	return -EINVAL;
}

static int vidioc_g_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctrl)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
		if (ctrl->id == viu_qctrl[i].id) {
			ctrl->value = qctl_regs[i];
			return 0;
		}
	}
	return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctrl)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
		if (ctrl->id == viu_qctrl[i].id) {
			if (ctrl->value < viu_qctrl[i].minimum
				|| ctrl->value > viu_qctrl[i].maximum)
					return -ERANGE;
			qctl_regs[i] = ctrl->value;
			return 0;
		}
	}
	return -EINVAL;
}

inline void viu_activate_next_buf(struct viu_dev *dev,
				struct viu_dmaqueue *viuq)
{
	struct viu_dmaqueue *vidq = viuq;
	struct viu_buf *buf;

	/* launch another DMA operation for an active/queued buffer */
	if (!list_empty(&vidq->active)) {
		buf = list_entry(vidq->active.next, struct viu_buf,
					vb.queue);
		dprintk(1, "start another queued buffer: 0x%p\n", buf);
		buffer_activate(dev, buf);
	} else if (!list_empty(&vidq->queued)) {
		buf = list_entry(vidq->queued.next, struct viu_buf,
					vb.queue);
		list_del(&buf->vb.queue);

		dprintk(1, "start another queued buffer: 0x%p\n", buf);
		list_add_tail(&buf->vb.queue, &vidq->active);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buffer_activate(dev, buf);
	}
}

inline void viu_default_settings(struct viu_reg *viu_reg)
{
	struct viu_reg *vr = viu_reg;

	out_be32(&vr->luminance, 0x9512A254);
	out_be32(&vr->chroma_r, 0x03310000);
	out_be32(&vr->chroma_g, 0x06600F38);
	out_be32(&vr->chroma_b, 0x00000409);
	out_be32(&vr->alpha, 0x000000ff);
	out_be32(&vr->req_alarm, 0x00000090);
	dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
		in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
}

static void viu_overlay_intr(struct viu_dev *dev, u32 status)
{
	struct viu_reg *vr = dev->vr;

	if (status & INT_DMA_END_STATUS)
		dev->dma_done = 1;

	if (status & INT_FIELD_STATUS) {
		if (dev->dma_done) {
			u32 addr = reg_val.field_base_addr;

			dev->dma_done = 0;
			if (status & FIELD_NO)
				addr += reg_val.dma_inc;

			out_be32(&vr->field_base_addr, addr);
			out_be32(&vr->dma_inc, reg_val.dma_inc);
			out_be32(&vr->status_cfg,
				 (status & 0xffc0ffff) |
				 (status & INT_ALL_STATUS) |
				 reg_val.status_cfg);
		} else if (status & INT_VSYNC_STATUS) {
			out_be32(&vr->status_cfg,
				 (status & 0xffc0ffff) |
				 (status & INT_ALL_STATUS) |
				 reg_val.status_cfg);
		}
	}
}

static void viu_capture_intr(struct viu_dev *dev, u32 status)
{
	struct viu_dmaqueue *vidq = &dev->vidq;
	struct viu_reg *vr = dev->vr;
	struct viu_buf *buf;
	int field_num;
	int need_two;
	int dma_done = 0;

	field_num = status & FIELD_NO;
	need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);

	if (status & INT_DMA_END_STATUS) {
		dma_done = 1;
		if (((field_num == 0) && (dev->field == 0)) ||
		    (field_num && (dev->field == 1)))
			dev->field++;
	}

	if (status & INT_FIELD_STATUS) {
		dprintk(1, "irq: field %d, done %d\n",
			!!field_num, dma_done);
		if (unlikely(dev->first)) {
			if (field_num == 0) {
				dev->first = 0;
				dprintk(1, "activate first buf\n");
				viu_activate_next_buf(dev, vidq);
			} else
				dprintk(1, "wait field 0\n");
			return;
		}

		/* setup buffer address for next dma operation */
		if (!list_empty(&vidq->active)) {
			u32 addr = reg_val.field_base_addr;

			if (field_num && need_two) {
				addr += reg_val.dma_inc;
				dprintk(1, "field 1, 0x%lx, dev field %d\n",
					(unsigned long)addr, dev->field);
			}
			out_be32(&vr->field_base_addr, addr);
			out_be32(&vr->dma_inc, reg_val.dma_inc);
			out_be32(&vr->status_cfg,
				 (status & 0xffc0ffff) |
				 (status & INT_ALL_STATUS) |
				 reg_val.status_cfg);
			return;
		}
	}

	if (dma_done && field_num && (dev->field == 2)) {
		dev->field = 0;
		buf = list_entry(vidq->active.next,
				 struct viu_buf, vb.queue);
		dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
			buf, buf->vb.i,
			(unsigned long)videobuf_to_dma_contig(&buf->vb),
			(unsigned long)in_be32(&vr->field_base_addr));

		if (waitqueue_active(&buf->vb.done)) {
			list_del(&buf->vb.queue);
			v4l2_get_timestamp(&buf->vb.ts);
			buf->vb.state = VIDEOBUF_DONE;
			buf->vb.field_count++;
			wake_up(&buf->vb.done);
		}
		/* activate next dma buffer */
		viu_activate_next_buf(dev, vidq);
	}
}

static irqreturn_t viu_intr(int irq, void *dev_id)
{
	struct viu_dev *dev  = (struct viu_dev *)dev_id;
	struct viu_reg *vr = dev->vr;
	u32 status;
	u32 error;

	status = in_be32(&vr->status_cfg);

	if (status & INT_ERROR_STATUS) {
		dev->irqs.error_irq++;
		error = status & ERR_MASK;
		if (error)
			dprintk(1, "Err: error(%d), times:%d!\n",
				error >> 4, dev->irqs.error_irq);
		/* Clear interrupt error bit and error flags */
		out_be32(&vr->status_cfg,
			 (status & 0xffc0ffff) | INT_ERROR_STATUS);
	}

	if (status & INT_DMA_END_STATUS) {
		dev->irqs.dma_end_irq++;
		dev->dma_done = 1;
		dprintk(2, "VIU DMA end interrupt times: %d\n",
					dev->irqs.dma_end_irq);
	}

	if (status & INT_HSYNC_STATUS)
		dev->irqs.hsync_irq++;

	if (status & INT_FIELD_STATUS) {
		dev->irqs.field_irq++;
		dprintk(2, "VIU field interrupt times: %d\n",
					dev->irqs.field_irq);
	}

	if (status & INT_VSTART_STATUS)
		dev->irqs.vstart_irq++;

	if (status & INT_VSYNC_STATUS) {
		dev->irqs.vsync_irq++;
		dprintk(2, "VIU vsync interrupt times: %d\n",
			dev->irqs.vsync_irq);
	}

	/* clear all pending irqs */
	status = in_be32(&vr->status_cfg);
	out_be32(&vr->status_cfg,
		 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));

	if (dev->ovenable) {
		viu_overlay_intr(dev, status);
		return IRQ_HANDLED;
	}

	/* Capture mode */
	viu_capture_intr(dev, status);
	return IRQ_HANDLED;
}

/*
 * File operations for the device
 */
static int viu_open(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct viu_dev *dev = video_get_drvdata(vdev);
	struct viu_fh *fh;
	struct viu_reg *vr;
	int minor = vdev->minor;
	u32 status_cfg;
	int i;

	dprintk(1, "viu: open (minor=%d)\n", minor);

	dev->users++;
	if (dev->users > 1) {
		dev->users--;
		return -EBUSY;
	}

	vr = dev->vr;

	dprintk(1, "open minor=%d type=%s users=%d\n", minor,
		v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);

	if (mutex_lock_interruptible(&dev->lock)) {
		dev->users--;
		return -ERESTARTSYS;
	}

	/* allocate and initialize per filehandle data */
	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
	if (!fh) {
		dev->users--;
		mutex_unlock(&dev->lock);
		return -ENOMEM;
	}

	file->private_data = fh;
	fh->dev = dev;

	fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
	fh->width    = norm_maxw();
	fh->height   = norm_maxh();
	dev->crop_current.width  = fh->width;
	dev->crop_current.height = fh->height;

	/* Put all controls at a sane state */
	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
		qctl_regs[i] = viu_qctrl[i].default_value;

	dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
		(unsigned long)fh, (unsigned long)dev,
		(unsigned long)&dev->vidq);
	dprintk(1, "Open: list_empty queued=%d\n",
		list_empty(&dev->vidq.queued));
	dprintk(1, "Open: list_empty active=%d\n",
		list_empty(&dev->vidq.active));

	viu_default_settings(vr);

	status_cfg = in_be32(&vr->status_cfg);
	out_be32(&vr->status_cfg,
		 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
				INT_FIELD_EN | INT_VSTART_EN |
				INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));

	status_cfg = in_be32(&vr->status_cfg);
	out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);

	spin_lock_init(&fh->vbq_lock);
	videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
				       dev->dev, &fh->vbq_lock,
				       fh->type, V4L2_FIELD_INTERLACED,
				       sizeof(struct viu_buf), fh,
				       &fh->dev->lock);
	mutex_unlock(&dev->lock);
	return 0;
}

static ssize_t viu_read(struct file *file, char __user *data, size_t count,
			loff_t *ppos)
{
	struct viu_fh *fh = file->private_data;
	struct viu_dev *dev = fh->dev;
	int ret = 0;

	dprintk(2, "%s\n", __func__);
	if (dev->ovenable)
		dev->ovenable = 0;

	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
		if (mutex_lock_interruptible(&dev->lock))
			return -ERESTARTSYS;
		viu_start_dma(dev);
		ret = videobuf_read_stream(&fh->vb_vidq, data, count,
				ppos, 0, file->f_flags & O_NONBLOCK);
		mutex_unlock(&dev->lock);
		return ret;
	}
	return 0;
}

static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
{
	struct viu_fh *fh = file->private_data;
	struct videobuf_queue *q = &fh->vb_vidq;
	struct viu_dev *dev = fh->dev;
	unsigned int res;

	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
		return POLLERR;

	mutex_lock(&dev->lock);
	res = videobuf_poll_stream(file, q, wait);
	mutex_unlock(&dev->lock);
	return res;
}

static int viu_release(struct file *file)
{
	struct viu_fh *fh = file->private_data;
	struct viu_dev *dev = fh->dev;
	int minor = video_devdata(file)->minor;

	mutex_lock(&dev->lock);
	viu_stop_dma(dev);
	videobuf_stop(&fh->vb_vidq);
	videobuf_mmap_free(&fh->vb_vidq);
	mutex_unlock(&dev->lock);

	kfree(fh);

	dev->users--;
	dprintk(1, "close (minor=%d, users=%d)\n",
		minor, dev->users);
	return 0;
}

void viu_reset(struct viu_reg *reg)
{
	out_be32(&reg->status_cfg, 0);
	out_be32(&reg->luminance, 0x9512a254);
	out_be32(&reg->chroma_r, 0x03310000);
	out_be32(&reg->chroma_g, 0x06600f38);
	out_be32(&reg->chroma_b, 0x00000409);
	out_be32(&reg->field_base_addr, 0);
	out_be32(&reg->dma_inc, 0);
	out_be32(&reg->picture_count, 0x01e002d0);
	out_be32(&reg->req_alarm, 0x00000090);
	out_be32(&reg->alpha, 0x000000ff);
}

static int viu_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct viu_fh *fh = file->private_data;
	struct viu_dev *dev = fh->dev;
	int ret;

	dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);

	if (mutex_lock_interruptible(&dev->lock))
		return -ERESTARTSYS;
	ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
	mutex_unlock(&dev->lock);

	dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
		(unsigned long)vma->vm_start,
		(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
		ret);

	return ret;
}

static struct v4l2_file_operations viu_fops = {
	.owner		= THIS_MODULE,
	.open		= viu_open,
	.release	= viu_release,
	.read		= viu_read,
	.poll		= viu_poll,
	.unlocked_ioctl	= video_ioctl2, /* V4L2 ioctl handler */
	.mmap		= viu_mmap,
};

static const struct v4l2_ioctl_ops viu_ioctl_ops = {
	.vidioc_querycap	= vidioc_querycap,
	.vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
	.vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
	.vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
	.vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
	.vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
	.vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
	.vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
	.vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
	.vidioc_overlay	      = vidioc_overlay,
	.vidioc_g_fbuf	      = vidioc_g_fbuf,
	.vidioc_s_fbuf	      = vidioc_s_fbuf,
	.vidioc_reqbufs       = vidioc_reqbufs,
	.vidioc_querybuf      = vidioc_querybuf,
	.vidioc_qbuf          = vidioc_qbuf,
	.vidioc_dqbuf         = vidioc_dqbuf,
	.vidioc_g_std         = vidioc_g_std,
	.vidioc_s_std         = vidioc_s_std,
	.vidioc_querystd      = vidioc_querystd,
	.vidioc_enum_input    = vidioc_enum_input,
	.vidioc_g_input       = vidioc_g_input,
	.vidioc_s_input       = vidioc_s_input,
	.vidioc_queryctrl     = vidioc_queryctrl,
	.vidioc_g_ctrl        = vidioc_g_ctrl,
	.vidioc_s_ctrl        = vidioc_s_ctrl,
	.vidioc_streamon      = vidioc_streamon,
	.vidioc_streamoff     = vidioc_streamoff,
};

static struct video_device viu_template = {
	.name		= "FSL viu",
	.fops		= &viu_fops,
	.minor		= -1,
	.ioctl_ops	= &viu_ioctl_ops,
	.release	= video_device_release,

	.tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
	.current_norm   = V4L2_STD_NTSC_M,
};

static int viu_of_probe(struct platform_device *op)
{
	struct viu_dev *viu_dev;
	struct video_device *vdev;
	struct resource r;
	struct viu_reg __iomem *viu_regs;
	struct i2c_adapter *ad;
	int ret, viu_irq;

	ret = of_address_to_resource(op->dev.of_node, 0, &r);
	if (ret) {
		dev_err(&op->dev, "Can't parse device node resource\n");
		return -ENODEV;
	}

	viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
	if (viu_irq == NO_IRQ) {
		dev_err(&op->dev, "Error while mapping the irq\n");
		return -EINVAL;
	}

	/* request mem region */
	if (!devm_request_mem_region(&op->dev, r.start,
				     sizeof(struct viu_reg), DRV_NAME)) {
		dev_err(&op->dev, "Error while requesting mem region\n");
		ret = -EBUSY;
		goto err;
	}

	/* remap registers */
	viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
	if (!viu_regs) {
		dev_err(&op->dev, "Can't map register set\n");
		ret = -ENOMEM;
		goto err;
	}

	/* Prepare our private structure */
	viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
	if (!viu_dev) {
		dev_err(&op->dev, "Can't allocate private structure\n");
		ret = -ENOMEM;
		goto err;
	}

	viu_dev->vr = viu_regs;
	viu_dev->irq = viu_irq;
	viu_dev->dev = &op->dev;

	/* init video dma queues */
	INIT_LIST_HEAD(&viu_dev->vidq.active);
	INIT_LIST_HEAD(&viu_dev->vidq.queued);

	snprintf(viu_dev->v4l2_dev.name,
		 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
	ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
	if (ret < 0) {
		dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
		goto err;
	}

	ad = i2c_get_adapter(0);
	viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
			"saa7113", VIU_VIDEO_DECODER_ADDR, NULL);

	viu_dev->vidq.timeout.function = viu_vid_timeout;
	viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
	init_timer(&viu_dev->vidq.timeout);
	viu_dev->first = 1;

	/* Allocate memory for video device */
	vdev = video_device_alloc();
	if (vdev == NULL) {
		ret = -ENOMEM;
		goto err_vdev;
	}

	memcpy(vdev, &viu_template, sizeof(viu_template));

	vdev->v4l2_dev = &viu_dev->v4l2_dev;

	viu_dev->vdev = vdev;

	/* initialize locks */
	mutex_init(&viu_dev->lock);
	viu_dev->vdev->lock = &viu_dev->lock;
	spin_lock_init(&viu_dev->slock);

	video_set_drvdata(viu_dev->vdev, viu_dev);

	mutex_lock(&viu_dev->lock);

	ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
	if (ret < 0) {
		video_device_release(viu_dev->vdev);
		goto err_vdev;
	}

	/* enable VIU clock */
	viu_dev->clk = clk_get(&op->dev, "viu_clk");
	if (IS_ERR(viu_dev->clk)) {
		dev_err(&op->dev, "failed to find the clock module!\n");
		ret = -ENODEV;
		goto err_clk;
	} else {
		clk_enable(viu_dev->clk);
	}

	/* reset VIU module */
	viu_reset(viu_dev->vr);

	/* install interrupt handler */
	if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
		dev_err(&op->dev, "Request VIU IRQ failed.\n");
		ret = -ENODEV;
		goto err_irq;
	}

	mutex_unlock(&viu_dev->lock);

	dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
	return ret;

err_irq:
	clk_disable(viu_dev->clk);
	clk_put(viu_dev->clk);
err_clk:
	video_unregister_device(viu_dev->vdev);
err_vdev:
	mutex_unlock(&viu_dev->lock);
	i2c_put_adapter(ad);
	v4l2_device_unregister(&viu_dev->v4l2_dev);
err:
	irq_dispose_mapping(viu_irq);
	return ret;
}

static int viu_of_remove(struct platform_device *op)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
	struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
					      struct v4l2_subdev, list);
	struct i2c_client *client = v4l2_get_subdevdata(sdev);

	free_irq(dev->irq, (void *)dev);
	irq_dispose_mapping(dev->irq);

	clk_disable(dev->clk);
	clk_put(dev->clk);

	video_unregister_device(dev->vdev);
	i2c_put_adapter(client->adapter);
	v4l2_device_unregister(&dev->v4l2_dev);
	return 0;
}

#ifdef CONFIG_PM
static int viu_suspend(struct platform_device *op, pm_message_t state)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);

	clk_disable(dev->clk);
	return 0;
}

static int viu_resume(struct platform_device *op)
{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);

	clk_enable(dev->clk);
	return 0;
}
#endif

/*
 * Initialization and module stuff
 */
static struct of_device_id mpc512x_viu_of_match[] = {
	{
		.compatible = "fsl,mpc5121-viu",
	},
	{},
};
MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);

static struct platform_driver viu_of_platform_driver = {
	.probe = viu_of_probe,
	.remove = viu_of_remove,
#ifdef CONFIG_PM
	.suspend = viu_suspend,
	.resume = viu_resume,
#endif
	.driver = {
		.name = DRV_NAME,
		.owner = THIS_MODULE,
		.of_match_table = mpc512x_viu_of_match,
	},
};

module_platform_driver(viu_of_platform_driver);

MODULE_DESCRIPTION("Freescale Video-In(VIU)");
MODULE_AUTHOR("Hongjun Chen");
MODULE_LICENSE("GPL");
MODULE_VERSION(VIU_VERSION);

Privacy Policy