aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/cx25821/cx25821-video.c
blob: d3aa166740cde8ad5e0f2a3b27892b5e23c09b17 (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
/*
 *  Driver for the Conexant CX25821 PCIe bridge
 *
 *  Copyright (C) 2009 Conexant Systems Inc.
 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
 *  Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
 *  Parts adapted/taken from Eduardo Moscoso Rubino
 *  Copyright (C) 2009 Eduardo Moscoso Rubino <moscoso@TopoLogica.com>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "cx25821-video.h"

MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
MODULE_LICENSE("GPL");

static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };

module_param_array(video_nr, int, NULL, 0444);

MODULE_PARM_DESC(video_nr, "video device numbers");

static unsigned int video_debug = VIDEO_DEBUG;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

static unsigned int irq_debug;
module_param(irq_debug, int, 0644);
MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");

static unsigned int vid_limit = 16;
module_param(vid_limit, int, 0644);
MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");

#define FORMAT_FLAGS_PACKED       0x01

static const struct cx25821_fmt formats[] = {
	{
		.name = "4:1:1, packed, Y41P",
		.fourcc = V4L2_PIX_FMT_Y41P,
		.depth = 12,
		.flags = FORMAT_FLAGS_PACKED,
	}, {
		.name = "4:2:2, packed, YUYV",
		.fourcc = V4L2_PIX_FMT_YUYV,
		.depth = 16,
		.flags = FORMAT_FLAGS_PACKED,
	},
};

static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(formats); i++)
		if (formats[i].fourcc == fourcc)
			return formats + i;
	return NULL;
}

void cx25821_video_wakeup(struct cx25821_dev *dev, struct cx25821_dmaqueue *q,
			  u32 count)
{
	struct cx25821_buffer *buf;
	int bc;

	for (bc = 0;; bc++) {
		if (list_empty(&q->active)) {
			dprintk(1, "bc=%d (=0: active empty)\n", bc);
			break;
		}

		buf = list_entry(q->active.next, struct cx25821_buffer,
				vb.queue);

		/* count comes from the hw and it is 16bit wide --
		 * this trick handles wrap-arounds correctly for
		 * up to 32767 buffers in flight... */
		if ((s16) (count - buf->count) < 0)
			break;

		v4l2_get_timestamp(&buf->vb.ts);
		buf->vb.state = VIDEOBUF_DONE;
		list_del(&buf->vb.queue);
		wake_up(&buf->vb.done);
	}

	if (list_empty(&q->active))
		del_timer(&q->timeout);
	else
		mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
	if (bc != 1)
		pr_err("%s: %d buffers handled (should be 1)\n", __func__, bc);
}

static int cx25821_set_tvnorm(struct cx25821_dev *dev, v4l2_std_id norm)
{
	dprintk(1, "%s(norm = 0x%08x) name: [%s]\n",
		__func__, (unsigned int)norm, v4l2_norm_to_name(norm));

	dev->tvnorm = norm;

	/* Tell the internal A/V decoder */
	cx25821_call_all(dev, core, s_std, norm);

	return 0;
}

static int cx25821_video_mux(struct cx25821_dev *dev, unsigned int input)
{
	struct v4l2_routing route;
	memset(&route, 0, sizeof(route));

	dprintk(1, "%s(): video_mux: %d [vmux=%d, gpio=0x%x,0x%x,0x%x,0x%x]\n",
		__func__, input, INPUT(input)->vmux, INPUT(input)->gpio0,
		INPUT(input)->gpio1, INPUT(input)->gpio2, INPUT(input)->gpio3);
	dev->input = input;

	route.input = INPUT(input)->vmux;

	/* Tell the internal A/V decoder */
	cx25821_call_all(dev, video, s_routing, INPUT(input)->vmux, 0, 0);

	return 0;
}

int cx25821_start_video_dma(struct cx25821_dev *dev,
			    struct cx25821_dmaqueue *q,
			    struct cx25821_buffer *buf,
			    const struct sram_channel *channel)
{
	int tmp = 0;

	/* setup fifo + format */
	cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);

	/* reset counter */
	cx_write(channel->gpcnt_ctl, 3);
	q->count = 1;

	/* enable irq */
	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
	cx_set(channel->int_msk, 0x11);

	/* start dma */
	cx_write(channel->dma_ctl, 0x11);	/* FIFO and RISC enable */

	/* make sure upstream setting if any is reversed */
	tmp = cx_read(VID_CH_MODE_SEL);
	cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);

	return 0;
}

static int cx25821_restart_video_queue(struct cx25821_dev *dev,
				       struct cx25821_dmaqueue *q,
				       const struct sram_channel *channel)
{
	struct cx25821_buffer *buf, *prev;
	struct list_head *item;

	if (!list_empty(&q->active)) {
		buf = list_entry(q->active.next, struct cx25821_buffer,
				vb.queue);

		cx25821_start_video_dma(dev, q, buf, channel);

		list_for_each(item, &q->active) {
			buf = list_entry(item, struct cx25821_buffer, vb.queue);
			buf->count = q->count++;
		}

		mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
		return 0;
	}

	prev = NULL;
	for (;;) {
		if (list_empty(&q->queued))
			return 0;

		buf = list_entry(q->queued.next, struct cx25821_buffer,
				vb.queue);

		if (NULL == prev) {
			list_move_tail(&buf->vb.queue, &q->active);
			cx25821_start_video_dma(dev, q, buf, channel);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count = q->count++;
			mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
		} else if (prev->vb.width == buf->vb.width &&
			   prev->vb.height == buf->vb.height &&
			   prev->fmt == buf->fmt) {
			list_move_tail(&buf->vb.queue, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
			prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63 - 32 */
		} else {
			return 0;
		}
		prev = buf;
	}
}

static void cx25821_vid_timeout(unsigned long data)
{
	struct cx25821_data *timeout_data = (struct cx25821_data *)data;
	struct cx25821_dev *dev = timeout_data->dev;
	const struct sram_channel *channel = timeout_data->channel;
	struct cx25821_dmaqueue *q = &dev->channels[channel->i].dma_vidq;
	struct cx25821_buffer *buf;
	unsigned long flags;

	/* cx25821_sram_channel_dump(dev, channel); */
	cx_clear(channel->dma_ctl, 0x11);

	spin_lock_irqsave(&dev->slock, flags);
	while (!list_empty(&q->active)) {
		buf = list_entry(q->active.next, struct cx25821_buffer,
				vb.queue);
		list_del(&buf->vb.queue);

		buf->vb.state = VIDEOBUF_ERROR;
		wake_up(&buf->vb.done);
	}

	cx25821_restart_video_queue(dev, q, channel);
	spin_unlock_irqrestore(&dev->slock, flags);
}

int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
{
	u32 count = 0;
	int handled = 0;
	u32 mask;
	const struct sram_channel *channel = dev->channels[chan_num].sram_channels;

	mask = cx_read(channel->int_msk);
	if (0 == (status & mask))
		return handled;

	cx_write(channel->int_stat, status);

	/* risc op code error */
	if (status & (1 << 16)) {
		pr_warn("%s, %s: video risc op code error\n",
			dev->name, channel->name);
		cx_clear(channel->dma_ctl, 0x11);
		cx25821_sram_channel_dump(dev, channel);
	}

	/* risc1 y */
	if (status & FLD_VID_DST_RISC1) {
		spin_lock(&dev->slock);
		count = cx_read(channel->gpcnt);
		cx25821_video_wakeup(dev, &dev->channels[channel->i].dma_vidq,
				count);
		spin_unlock(&dev->slock);
		handled++;
	}

	/* risc2 y */
	if (status & 0x10) {
		dprintk(2, "stopper video\n");
		spin_lock(&dev->slock);
		cx25821_restart_video_queue(dev,
				&dev->channels[channel->i].dma_vidq, channel);
		spin_unlock(&dev->slock);
		handled++;
	}
	return handled;
}

static int cx25821_buffer_setup(struct videobuf_queue *q, unsigned int *count,
		 unsigned int *size)
{
	struct cx25821_channel *chan = q->priv_data;

	*size = chan->fmt->depth * chan->width * chan->height >> 3;

	if (0 == *count)
		*count = 32;

	if (*size * *count > vid_limit * 1024 * 1024)
		*count = (vid_limit * 1024 * 1024) / *size;

	return 0;
}

static int cx25821_buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
		   enum v4l2_field field)
{
	struct cx25821_channel *chan = q->priv_data;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_buffer *buf =
		container_of(vb, struct cx25821_buffer, vb);
	int rc, init_buffer = 0;
	u32 line0_offset;
	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
	int bpl_local = LINE_SIZE_D1;

	BUG_ON(NULL == chan->fmt);
	if (chan->width < 48 || chan->width > 720 ||
	    chan->height < 32 || chan->height > 576)
		return -EINVAL;

	buf->vb.size = (chan->width * chan->height * chan->fmt->depth) >> 3;

	if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
		return -EINVAL;

	if (buf->fmt != chan->fmt ||
	    buf->vb.width != chan->width ||
	    buf->vb.height != chan->height || buf->vb.field != field) {
		buf->fmt = chan->fmt;
		buf->vb.width = chan->width;
		buf->vb.height = chan->height;
		buf->vb.field = field;
		init_buffer = 1;
	}

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		init_buffer = 1;
		rc = videobuf_iolock(q, &buf->vb, NULL);
		if (0 != rc) {
			printk(KERN_DEBUG pr_fmt("videobuf_iolock failed!\n"));
			goto fail;
		}
	}

	dprintk(1, "init_buffer=%d\n", init_buffer);

	if (init_buffer) {
		if (chan->pixel_formats == PIXEL_FRMT_411)
			buf->bpl = (buf->fmt->depth * buf->vb.width) >> 3;
		else
			buf->bpl = (buf->fmt->depth >> 3) * (buf->vb.width);

		if (chan->pixel_formats == PIXEL_FRMT_411) {
			bpl_local = buf->bpl;
		} else {
			bpl_local = buf->bpl;   /* Default */

			if (chan->use_cif_resolution) {
				if (dev->tvnorm & V4L2_STD_625_50)
					bpl_local = 352 << 1;
				else
					bpl_local = chan->cif_width << 1;
			}
		}

		switch (buf->vb.field) {
		case V4L2_FIELD_TOP:
			cx25821_risc_buffer(dev->pci, &buf->risc,
					    dma->sglist, 0, UNSET,
					    buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_BOTTOM:
			cx25821_risc_buffer(dev->pci, &buf->risc,
					    dma->sglist, UNSET, 0,
					    buf->bpl, 0, buf->vb.height);
			break;
		case V4L2_FIELD_INTERLACED:
			/* All other formats are top field first */
			line0_offset = 0;
			dprintk(1, "top field first\n");

			cx25821_risc_buffer(dev->pci, &buf->risc,
					    dma->sglist, line0_offset,
					    bpl_local, bpl_local, bpl_local,
					    buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_TB:
			cx25821_risc_buffer(dev->pci, &buf->risc,
					    dma->sglist,
					    0, buf->bpl * (buf->vb.height >> 1),
					    buf->bpl, 0, buf->vb.height >> 1);
			break;
		case V4L2_FIELD_SEQ_BT:
			cx25821_risc_buffer(dev->pci, &buf->risc,
					    dma->sglist,
					    buf->bpl * (buf->vb.height >> 1), 0,
					    buf->bpl, 0, buf->vb.height >> 1);
			break;
		default:
			BUG();
		}
	}

	dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
		buf, buf->vb.i, chan->width, chan->height, chan->fmt->depth,
		chan->fmt->name, (unsigned long)buf->risc.dma);

	buf->vb.state = VIDEOBUF_PREPARED;

	return 0;

fail:
	cx25821_free_buffer(q, buf);
	return rc;
}

static void cx25821_buffer_release(struct videobuf_queue *q,
			    struct videobuf_buffer *vb)
{
	struct cx25821_buffer *buf =
		container_of(vb, struct cx25821_buffer, vb);

	cx25821_free_buffer(q, buf);
}

static int cx25821_video_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct cx25821_channel *chan = video_drvdata(file);

	return videobuf_mmap_mapper(&chan->vidq, vma);
}


static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct cx25821_buffer *buf =
		container_of(vb, struct cx25821_buffer, vb);
	struct cx25821_buffer *prev;
	struct cx25821_channel *chan = vq->priv_data;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;

	/* add jump to stopper */
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
	buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */

	dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);

	if (!list_empty(&q->queued)) {
		list_add_tail(&buf->vb.queue, &q->queued);
		buf->vb.state = VIDEOBUF_QUEUED;
		dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf,
				buf->vb.i);

	} else if (list_empty(&q->active)) {
		list_add_tail(&buf->vb.queue, &q->active);
		cx25821_start_video_dma(dev, q, buf, chan->sram_channels);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buf->count = q->count++;
		mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
		dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
				buf, buf->vb.i, buf->count, q->count);
	} else {
		prev = list_entry(q->active.prev, struct cx25821_buffer,
				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, &q->active);
			buf->vb.state = VIDEOBUF_ACTIVE;
			buf->count = q->count++;
			prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);

			/* 64 bit bits 63-32 */
			prev->risc.jmp[2] = cpu_to_le32(0);
			dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
					buf, buf->vb.i, buf->count);

		} else {
			list_add_tail(&buf->vb.queue, &q->queued);
			buf->vb.state = VIDEOBUF_QUEUED;
			dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
					buf->vb.i);
		}
	}

	if (list_empty(&q->active))
		dprintk(2, "active queue empty!\n");
}

static struct videobuf_queue_ops cx25821_video_qops = {
	.buf_setup = cx25821_buffer_setup,
	.buf_prepare = cx25821_buffer_prepare,
	.buf_queue = buffer_queue,
	.buf_release = cx25821_buffer_release,
};

static ssize_t video_read(struct file *file, char __user * data, size_t count,
			 loff_t *ppos)
{
	struct v4l2_fh *fh = file->private_data;
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	int err = 0;

	if (mutex_lock_interruptible(&dev->lock))
		return -ERESTARTSYS;
	if (chan->streaming_fh && chan->streaming_fh != fh) {
		err = -EBUSY;
		goto unlock;
	}
	chan->streaming_fh = fh;

	err = videobuf_read_one(&chan->vidq, data, count, ppos,
				file->f_flags & O_NONBLOCK);
unlock:
	mutex_unlock(&dev->lock);
	return err;
}

static unsigned int video_poll(struct file *file,
			      struct poll_table_struct *wait)
{
	struct cx25821_channel *chan = video_drvdata(file);
	unsigned long req_events = poll_requested_events(wait);
	unsigned int res = v4l2_ctrl_poll(file, wait);

	if (req_events & (POLLIN | POLLRDNORM))
		res |= videobuf_poll_stream(file, &chan->vidq, wait);
	return res;

	/* This doesn't belong in poll(). This can be done
	 * much better with vb2. We keep this code here as a
	 * reminder.
	if ((res & POLLIN) && buf->vb.state == VIDEOBUF_DONE) {
		struct cx25821_dev *dev = chan->dev;

		if (dev && chan->use_cif_resolution) {
			u8 cam_id = *((char *)buf->vb.baddr + 3);
			memcpy((char *)buf->vb.baddr,
					(char *)buf->vb.baddr + (chan->width * 2),
					(chan->width * 2));
			*((char *)buf->vb.baddr + 3) = cam_id;
		}
	}
	 */
}

static int video_release(struct file *file)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct v4l2_fh *fh = file->private_data;
	struct cx25821_dev *dev = chan->dev;
	const struct sram_channel *sram_ch =
		dev->channels[0].sram_channels;

	mutex_lock(&dev->lock);
	/* stop the risc engine and fifo */
	cx_write(sram_ch->dma_ctl, 0); /* FIFO and RISC disable */

	/* stop video capture */
	if (chan->streaming_fh == fh) {
		videobuf_queue_cancel(&chan->vidq);
		chan->streaming_fh = NULL;
	}

	if (chan->vidq.read_buf) {
		cx25821_buffer_release(&chan->vidq, chan->vidq.read_buf);
		kfree(chan->vidq.read_buf);
	}

	videobuf_mmap_free(&chan->vidq);
	mutex_unlock(&dev->lock);

	return v4l2_fh_release(file);
}

/* VIDEO IOCTLS */
static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
				 struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);

	f->fmt.pix.width = chan->width;
	f->fmt.pix.height = chan->height;
	f->fmt.pix.field = chan->vidq.field;
	f->fmt.pix.pixelformat = chan->fmt->fourcc;
	f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
	f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
	f->fmt.pix.priv = 0;

	return 0;
}

static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
				   struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const struct cx25821_fmt *fmt;
	enum v4l2_field field = f->fmt.pix.field;
	unsigned int maxw, maxh;
	unsigned w;

	fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	if (NULL == fmt)
		return -EINVAL;
	maxw = 720;
	maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;

	w = f->fmt.pix.width;
	if (field != V4L2_FIELD_BOTTOM)
		field = V4L2_FIELD_TOP;
	if (w < 352) {
		w = 176;
		f->fmt.pix.height = maxh / 4;
	} else if (w < 720) {
		w = 352;
		f->fmt.pix.height = maxh / 2;
	} else {
		w = 720;
		f->fmt.pix.height = maxh;
		field = V4L2_FIELD_INTERLACED;
	}
	f->fmt.pix.field = field;
	f->fmt.pix.width = w;
	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
	f->fmt.pix.priv = 0;

	return 0;
}
static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct cx25821_channel *chan = video_drvdata(file);

	if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;

	if (chan->streaming_fh && chan->streaming_fh != priv)
		return -EBUSY;
	chan->streaming_fh = priv;

	return videobuf_streamon(&chan->vidq);
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct cx25821_channel *chan = video_drvdata(file);

	if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;

	if (chan->streaming_fh && chan->streaming_fh != priv)
		return -EBUSY;
	if (chan->streaming_fh == NULL)
		return 0;

	chan->streaming_fh = NULL;
	return videobuf_streamoff(&chan->vidq);
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	struct v4l2_mbus_framefmt mbus_fmt;
	int err;
	int pix_format = PIXEL_FRMT_422;

	err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);

	if (0 != err)
		return err;

	chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	chan->vidq.field = f->fmt.pix.field;
	chan->width = f->fmt.pix.width;
	chan->height = f->fmt.pix.height;

	if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
		pix_format = PIXEL_FRMT_411;
	else
		pix_format = PIXEL_FRMT_422;

	cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);

	/* check if cif resolution */
	if (chan->width == 320 || chan->width == 352)
		chan->use_cif_resolution = 1;
	else
		chan->use_cif_resolution = 0;

	chan->cif_width = chan->width;
	medusa_set_resolution(dev, chan->width, SRAM_CH00);

	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
	cx25821_call_all(dev, video, s_mbus_fmt, &mbus_fmt);

	return 0;
}

static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	int ret_val = 0;
	struct cx25821_channel *chan = video_drvdata(file);

	ret_val = videobuf_dqbuf(&chan->vidq, p, file->f_flags & O_NONBLOCK);
	p->sequence = chan->dma_vidq.count;

	return ret_val;
}

static int vidioc_log_status(struct file *file, void *priv)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const struct sram_channel *sram_ch = chan->sram_channels;
	u32 tmp = 0;

	cx25821_call_all(dev, core, log_status);
	tmp = cx_read(sram_ch->dma_ctl);
	pr_info("Video input 0 is %s\n",
		(tmp & 0x11) ? "streaming" : "stopped");
	return 0;
}


static int cx25821_vidioc_querycap(struct file *file, void *priv,
			    struct v4l2_capability *cap)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const u32 cap_input = V4L2_CAP_VIDEO_CAPTURE |
			V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
	const u32 cap_output = V4L2_CAP_VIDEO_OUTPUT;

	strcpy(cap->driver, "cx25821");
	strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
	sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
	if (chan->id >= VID_CHANNEL_NUM)
		cap->device_caps = cap_output;
	else
		cap->device_caps = cap_input;
	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
			    struct v4l2_fmtdesc *f)
{
	if (unlikely(f->index >= ARRAY_SIZE(formats)))
		return -EINVAL;

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

	return 0;
}

static int cx25821_vidioc_reqbufs(struct file *file, void *priv,
			   struct v4l2_requestbuffers *p)
{
	struct cx25821_channel *chan = video_drvdata(file);

	return videobuf_reqbufs(&chan->vidq, p);
}

static int cx25821_vidioc_querybuf(struct file *file, void *priv,
			    struct v4l2_buffer *p)
{
	struct cx25821_channel *chan = video_drvdata(file);

	return videobuf_querybuf(&chan->vidq, p);
}

static int cx25821_vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct cx25821_channel *chan = video_drvdata(file);

	return videobuf_qbuf(&chan->vidq, p);
}

static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
{
	struct cx25821_channel *chan = video_drvdata(file);

	*tvnorms = chan->dev->tvnorm;
	return 0;
}

int cx25821_vidioc_s_std(struct file *file, void *priv, v4l2_std_id tvnorms)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	if (dev->tvnorm == tvnorms)
		return 0;

	cx25821_set_tvnorm(dev, tvnorms);
	chan->width = 720;
	chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;

	medusa_set_videostandard(dev);

	return 0;
}

static int cx25821_vidioc_enum_input(struct file *file, void *priv,
			      struct v4l2_input *i)
{
	static const char * const iname[] = {
		[CX25821_VMUX_COMPOSITE] = "Composite",
		[CX25821_VMUX_SVIDEO] = "S-Video",
		[CX25821_VMUX_DEBUG] = "for debug only",
	};
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	unsigned int n;

	n = i->index;
	if (n >= CX25821_NR_INPUT)
		return -EINVAL;

	if (0 == INPUT(n)->type)
		return -EINVAL;

	i->type = V4L2_INPUT_TYPE_CAMERA;
	strcpy(i->name, iname[INPUT(n)->type]);

	i->std = CX25821_NORMS;
	return 0;
}

static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	*i = dev->input;
	return 0;
}

static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	if (i >= CX25821_NR_INPUT || INPUT(i)->type == 0)
		return -EINVAL;

	cx25821_video_mux(dev, i);
	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
int cx25821_vidioc_g_register(struct file *file, void *fh,
		      struct v4l2_dbg_register *reg)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	if (!v4l2_chip_match_host(&reg->match))
		return -EINVAL;

	cx25821_call_all(dev, core, g_register, reg);

	return 0;
}

int cx25821_vidioc_s_register(struct file *file, void *fh,
		      const struct v4l2_dbg_register *reg)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	if (!v4l2_chip_match_host(&reg->match))
		return -EINVAL;

	cx25821_call_all(dev, core, s_register, reg);

	return 0;
}

#endif

static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct cx25821_channel *chan =
		container_of(ctrl->handler, struct cx25821_channel, hdl);
	struct cx25821_dev *dev = chan->dev;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		medusa_set_brightness(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_HUE:
		medusa_set_hue(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_CONTRAST:
		medusa_set_contrast(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_SATURATION:
		medusa_set_saturation(dev, ctrl->val, chan->id);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static long video_ioctl_upstream9(struct file *file, unsigned int cmd,
				 unsigned long arg)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	int command = 0;
	struct upstream_user_struct *data_from_user;

	data_from_user = (struct upstream_user_struct *)arg;

	if (!data_from_user) {
		pr_err("%s(): Upstream data is INVALID. Returning\n", __func__);
		return 0;
	}

	command = data_from_user->command;

	if (command != UPSTREAM_START_VIDEO && command != UPSTREAM_STOP_VIDEO)
		return 0;

	dev->input_filename = data_from_user->input_filename;
	dev->input_audiofilename = data_from_user->input_filename;
	dev->vid_stdname = data_from_user->vid_stdname;
	dev->pixel_format = data_from_user->pixel_format;
	dev->channel_select = data_from_user->channel_select;
	dev->command = data_from_user->command;

	switch (command) {
	case UPSTREAM_START_VIDEO:
		cx25821_start_upstream_video_ch1(dev, data_from_user);
		break;

	case UPSTREAM_STOP_VIDEO:
		cx25821_stop_upstream_video_ch1(dev);
		break;
	}

	return 0;
}

static long video_ioctl_upstream10(struct file *file, unsigned int cmd,
				  unsigned long arg)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	int command = 0;
	struct upstream_user_struct *data_from_user;

	data_from_user = (struct upstream_user_struct *)arg;

	if (!data_from_user) {
		pr_err("%s(): Upstream data is INVALID. Returning\n", __func__);
		return 0;
	}

	command = data_from_user->command;

	if (command != UPSTREAM_START_VIDEO && command != UPSTREAM_STOP_VIDEO)
		return 0;

	dev->input_filename_ch2 = data_from_user->input_filename;
	dev->input_audiofilename = data_from_user->input_filename;
	dev->vid_stdname_ch2 = data_from_user->vid_stdname;
	dev->pixel_format_ch2 = data_from_user->pixel_format;
	dev->channel_select_ch2 = data_from_user->channel_select;
	dev->command_ch2 = data_from_user->command;

	switch (command) {
	case UPSTREAM_START_VIDEO:
		cx25821_start_upstream_video_ch2(dev, data_from_user);
		break;

	case UPSTREAM_STOP_VIDEO:
		cx25821_stop_upstream_video_ch2(dev);
		break;
	}

	return 0;
}

static long video_ioctl_upstream11(struct file *file, unsigned int cmd,
				  unsigned long arg)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	int command = 0;
	struct upstream_user_struct *data_from_user;

	data_from_user = (struct upstream_user_struct *)arg;

	if (!data_from_user) {
		pr_err("%s(): Upstream data is INVALID. Returning\n", __func__);
		return 0;
	}

	command = data_from_user->command;

	if (command != UPSTREAM_START_AUDIO && command != UPSTREAM_STOP_AUDIO)
		return 0;

	dev->input_filename = data_from_user->input_filename;
	dev->input_audiofilename = data_from_user->input_filename;
	dev->vid_stdname = data_from_user->vid_stdname;
	dev->pixel_format = data_from_user->pixel_format;
	dev->channel_select = data_from_user->channel_select;
	dev->command = data_from_user->command;

	switch (command) {
	case UPSTREAM_START_AUDIO:
		cx25821_start_upstream_audio(dev, data_from_user);
		break;

	case UPSTREAM_STOP_AUDIO:
		cx25821_stop_upstream_audio(dev);
		break;
	}

	return 0;
}

static long cx25821_video_ioctl(struct file *file,
				unsigned int cmd, unsigned long arg)
{
	struct cx25821_channel *chan = video_drvdata(file);

	/* check to see if it's the video upstream */
	if (chan->id == SRAM_CH09)
		return video_ioctl_upstream9(file, cmd, arg);
	if (chan->id == SRAM_CH10)
		return video_ioctl_upstream10(file, cmd, arg);
	if (chan->id == SRAM_CH11)
		return video_ioctl_upstream11(file, cmd, arg);

	return video_ioctl2(file, cmd, arg);
}

static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
	.s_ctrl = cx25821_s_ctrl,
};

static const struct v4l2_file_operations video_fops = {
	.owner = THIS_MODULE,
	.open = v4l2_fh_open,
	.release = video_release,
	.read = video_read,
	.poll = video_poll,
	.mmap = cx25821_video_mmap,
	.unlocked_ioctl = cx25821_video_ioctl,
};

static const struct v4l2_ioctl_ops video_ioctl_ops = {
	.vidioc_querycap = cx25821_vidioc_querycap,
	.vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
	.vidioc_reqbufs = cx25821_vidioc_reqbufs,
	.vidioc_querybuf = cx25821_vidioc_querybuf,
	.vidioc_qbuf = cx25821_vidioc_qbuf,
	.vidioc_dqbuf = vidioc_dqbuf,
	.vidioc_g_std = cx25821_vidioc_g_std,
	.vidioc_s_std = cx25821_vidioc_s_std,
	.vidioc_enum_input = cx25821_vidioc_enum_input,
	.vidioc_g_input = cx25821_vidioc_g_input,
	.vidioc_s_input = cx25821_vidioc_s_input,
	.vidioc_streamon = vidioc_streamon,
	.vidioc_streamoff = vidioc_streamoff,
	.vidioc_log_status = vidioc_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.vidioc_g_register = cx25821_vidioc_g_register,
	.vidioc_s_register = cx25821_vidioc_s_register,
#endif
};

static const struct video_device cx25821_video_device = {
	.name = "cx25821-video",
	.fops = &video_fops,
	.release = video_device_release_empty,
	.minor = -1,
	.ioctl_ops = &video_ioctl_ops,
	.tvnorms = CX25821_NORMS,
};

void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
{
	cx_clear(PCI_INT_MSK, 1);

	if (video_is_registered(&dev->channels[chan_num].vdev)) {
		video_unregister_device(&dev->channels[chan_num].vdev);
		v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);

		btcx_riscmem_free(dev->pci,
				&dev->channels[chan_num].dma_vidq.stopper);
	}
}

int cx25821_video_register(struct cx25821_dev *dev)
{
	int err;
	int i;

	/* initial device configuration */
	dev->tvnorm = V4L2_STD_NTSC_M,
	cx25821_set_tvnorm(dev, dev->tvnorm);

	spin_lock_init(&dev->slock);

	for (i = 0; i < VID_CHANNEL_NUM; ++i) {
		struct cx25821_channel *chan = &dev->channels[i];
		struct video_device *vdev = &chan->vdev;
		struct v4l2_ctrl_handler *hdl = &chan->hdl;

		if (i == SRAM_CH08) /* audio channel */
			continue;

		v4l2_ctrl_handler_init(hdl, 4);
		v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
			V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
		v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
			V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
		v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
			V4L2_CID_SATURATION, 0, 10000, 1, 5000);
		v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
			V4L2_CID_HUE, 0, 10000, 1, 5000);
		if (hdl->error) {
			err = hdl->error;
			goto fail_unreg;
		}
		err = v4l2_ctrl_handler_setup(hdl);
		if (err)
			goto fail_unreg;

		cx25821_risc_stopper(dev->pci, &chan->dma_vidq.stopper,
			chan->sram_channels->dma_ctl, 0x11, 0);

		chan->sram_channels = &cx25821_sram_channels[i];
		chan->width = 720;
		if (dev->tvnorm & V4L2_STD_625_50)
			chan->height = 576;
		else
			chan->height = 480;

		if (chan->pixel_formats == PIXEL_FRMT_411)
			chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
		else
			chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);

		cx_write(chan->sram_channels->int_stat, 0xffffffff);

		INIT_LIST_HEAD(&chan->dma_vidq.active);
		INIT_LIST_HEAD(&chan->dma_vidq.queued);

		chan->timeout_data.dev = dev;
		chan->timeout_data.channel = &cx25821_sram_channels[i];
		chan->dma_vidq.timeout.function = cx25821_vid_timeout;
		chan->dma_vidq.timeout.data = (unsigned long)&chan->timeout_data;
		init_timer(&chan->dma_vidq.timeout);

		videobuf_queue_sg_init(&chan->vidq, &cx25821_video_qops, &dev->pci->dev,
			&dev->slock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
			V4L2_FIELD_INTERLACED, sizeof(struct cx25821_buffer),
			chan, &dev->lock);

		/* register v4l devices */
		*vdev = cx25821_video_device;
		vdev->v4l2_dev = &dev->v4l2_dev;
		vdev->ctrl_handler = hdl;
		vdev->lock = &dev->lock;
		set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
		snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
		video_set_drvdata(vdev, chan);

		err = video_register_device(vdev, VFL_TYPE_GRABBER,
					    video_nr[dev->nr]);

		if (err < 0)
			goto fail_unreg;
	}

	/* set PCI interrupt */
	cx_set(PCI_INT_MSK, 0xff);

	return 0;

fail_unreg:
	while (i >= 0)
		cx25821_video_unregister(dev, i--);
	return err;
}

Privacy Policy