summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx18/cx18-streams.c
blob: 987a9308d938523dab6914ddc647bd3ee4364b3b (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
/*
 *  cx18 init/start/stop/exit stream functions
 *
 *  Derived from ivtv-streams.c
 *
 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
 *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
 *
 *  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
 */

#include "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-fileops.h"
#include "cx18-mailbox.h"
#include "cx18-i2c.h"
#include "cx18-queue.h"
#include "cx18-ioctl.h"
#include "cx18-streams.h"
#include "cx18-cards.h"
#include "cx18-scb.h"
#include "cx18-dvb.h"

#define CX18_DSP0_INTERRUPT_MASK     	0xd0004C

static struct v4l2_file_operations cx18_v4l2_enc_fops = {
	.owner = THIS_MODULE,
	.read = cx18_v4l2_read,
	.open = cx18_v4l2_open,
	/* FIXME change to video_ioctl2 if serialization lock can be removed */
	.ioctl = cx18_v4l2_ioctl,
	.release = cx18_v4l2_close,
	.poll = cx18_v4l2_enc_poll,
};

/* offset from 0 to register ts v4l2 minors on */
#define CX18_V4L2_ENC_TS_OFFSET   16
/* offset from 0 to register pcm v4l2 minors on */
#define CX18_V4L2_ENC_PCM_OFFSET  24
/* offset from 0 to register yuv v4l2 minors on */
#define CX18_V4L2_ENC_YUV_OFFSET  32

static struct {
	const char *name;
	int vfl_type;
	int num_offset;
	int dma;
	enum v4l2_buf_type buf_type;
} cx18_stream_info[] = {
	{	/* CX18_ENC_STREAM_TYPE_MPG */
		"encoder MPEG",
		VFL_TYPE_GRABBER, 0,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	},
	{	/* CX18_ENC_STREAM_TYPE_TS */
		"TS",
		VFL_TYPE_GRABBER, -1,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	},
	{	/* CX18_ENC_STREAM_TYPE_YUV */
		"encoder YUV",
		VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	},
	{	/* CX18_ENC_STREAM_TYPE_VBI */
		"encoder VBI",
		VFL_TYPE_VBI, 0,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
	},
	{	/* CX18_ENC_STREAM_TYPE_PCM */
		"encoder PCM audio",
		VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
	},
	{	/* CX18_ENC_STREAM_TYPE_IDX */
		"encoder IDX",
		VFL_TYPE_GRABBER, -1,
		PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
	},
	{	/* CX18_ENC_STREAM_TYPE_RAD */
		"encoder radio",
		VFL_TYPE_RADIO, 0,
		PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
	},
};

static void cx18_stream_init(struct cx18 *cx, int type)
{
	struct cx18_stream *s = &cx->streams[type];
	struct video_device *video_dev = s->video_dev;

	/* we need to keep video_dev, so restore it afterwards */
	memset(s, 0, sizeof(*s));
	s->video_dev = video_dev;

	/* initialize cx18_stream fields */
	s->cx = cx;
	s->type = type;
	s->name = cx18_stream_info[type].name;
	s->handle = CX18_INVALID_TASK_HANDLE;

	s->dma = cx18_stream_info[type].dma;
	s->buffers = cx->stream_buffers[type];
	s->buf_size = cx->stream_buf_size[type];
	INIT_LIST_HEAD(&s->buf_pool);
	s->bufs_per_mdl = 1;
	s->mdl_size = s->buf_size * s->bufs_per_mdl;

	init_waitqueue_head(&s->waitq);
	s->id = -1;
	spin_lock_init(&s->q_free.lock);
	cx18_queue_init(&s->q_free);
	spin_lock_init(&s->q_busy.lock);
	cx18_queue_init(&s->q_busy);
	spin_lock_init(&s->q_full.lock);
	cx18_queue_init(&s->q_full);
	spin_lock_init(&s->q_idle.lock);
	cx18_queue_init(&s->q_idle);

	INIT_WORK(&s->out_work_order, cx18_out_work_handler);
}

static int cx18_prep_dev(struct cx18 *cx, int type)
{
	struct cx18_stream *s = &cx->streams[type];
	u32 cap = cx->v4l2_cap;
	int num_offset = cx18_stream_info[type].num_offset;
	int num = cx->instance + cx18_first_minor + num_offset;

	/* These four fields are always initialized. If video_dev == NULL, then
	   this stream is not in use. In that case no other fields but these
	   four can be used. */
	s->video_dev = NULL;
	s->cx = cx;
	s->type = type;
	s->name = cx18_stream_info[type].name;

	/* Check whether the radio is supported */
	if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
		return 0;

	/* Check whether VBI is supported */
	if (type == CX18_ENC_STREAM_TYPE_VBI &&
	    !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
		return 0;

	/* User explicitly selected 0 buffers for these streams, so don't
	   create them. */
	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
	    cx->stream_buffers[type] == 0) {
		CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
		return 0;
	}

	cx18_stream_init(cx, type);

	if (num_offset == -1)
		return 0;

	/* allocate and initialize the v4l2 video device structure */
	s->video_dev = video_device_alloc();
	if (s->video_dev == NULL) {
		CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
				s->name);
		return -ENOMEM;
	}

	snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
		 cx->v4l2_dev.name, s->name);

	s->video_dev->num = num;
	s->video_dev->v4l2_dev = &cx->v4l2_dev;
	s->video_dev->fops = &cx18_v4l2_enc_fops;
	s->video_dev->release = video_device_release;
	s->video_dev->tvnorms = V4L2_STD_ALL;
	cx18_set_funcs(s->video_dev);
	return 0;
}

/* Initialize v4l2 variables and register v4l2 devices */
int cx18_streams_setup(struct cx18 *cx)
{
	int type, ret;

	/* Setup V4L2 Devices */
	for (type = 0; type < CX18_MAX_STREAMS; type++) {
		/* Prepare device */
		ret = cx18_prep_dev(cx, type);
		if (ret < 0)
			break;

		/* Allocate Stream */
		ret = cx18_stream_alloc(&cx->streams[type]);
		if (ret < 0)
			break;
	}
	if (type == CX18_MAX_STREAMS)
		return 0;

	/* One or more streams could not be initialized. Clean 'em all up. */
	cx18_streams_cleanup(cx, 0);
	return ret;
}

static int cx18_reg_dev(struct cx18 *cx, int type)
{
	struct cx18_stream *s = &cx->streams[type];
	int vfl_type = cx18_stream_info[type].vfl_type;
	const char *name;
	int num, ret;

	/* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
	 * We need a VFL_TYPE_TS defined.
	 */
	if (strcmp("TS", s->name) == 0) {
		/* just return if no DVB is supported */
		if ((cx->card->hw_all & CX18_HW_DVB) == 0)
			return 0;
		ret = cx18_dvb_register(s);
		if (ret < 0) {
			CX18_ERR("DVB failed to register\n");
			return ret;
		}
	}

	if (s->video_dev == NULL)
		return 0;

	num = s->video_dev->num;
	/* card number + user defined offset + device offset */
	if (type != CX18_ENC_STREAM_TYPE_MPG) {
		struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];

		if (s_mpg->video_dev)
			num = s_mpg->video_dev->num
			    + cx18_stream_info[type].num_offset;
	}
	video_set_drvdata(s->video_dev, s);

	/* Register device. First try the desired minor, then any free one. */
	ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
	if (ret < 0) {
		CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
			s->name, num);
		video_device_release(s->video_dev);
		s->video_dev = NULL;
		return ret;
	}

	name = video_device_node_name(s->video_dev);

	switch (vfl_type) {
	case VFL_TYPE_GRABBER:
		CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
			  name, s->name, cx->stream_buffers[type],
			  cx->stream_buf_size[type] / 1024,
			  (cx->stream_buf_size[type] * 100 / 1024) % 100);
		break;

	case VFL_TYPE_RADIO:
		CX18_INFO("Registered device %s for %s\n", name, s->name);
		break;

	case VFL_TYPE_VBI:
		if (cx->stream_buffers[type])
			CX18_INFO("Registered device %s for %s "
				  "(%d x %d bytes)\n",
				  name, s->name, cx->stream_buffers[type],
				  cx->stream_buf_size[type]);
		else
			CX18_INFO("Registered device %s for %s\n",
				name, s->name);
		break;
	}

	return 0;
}

/* Register v4l2 devices */
int cx18_streams_register(struct cx18 *cx)
{
	int type;
	int err;
	int ret = 0;

	/* Register V4L2 devices */
	for (type = 0; type < CX18_MAX_STREAMS; type++) {
		err = cx18_reg_dev(cx, type);
		if (err && ret == 0)
			ret = err;
	}

	if (ret == 0)
		return 0;

	/* One or more streams could not be initialized. Clean 'em all up. */
	cx18_streams_cleanup(cx, 1);
	return ret;
}

/* Unregister v4l2 devices */
void cx18_streams_cleanup(struct cx18 *cx, int unregister)
{
	struct video_device *vdev;
	int type;

	/* Teardown all streams */
	for (type = 0; type < CX18_MAX_STREAMS; type++) {
		if (cx->streams[type].dvb.enabled) {
			cx18_dvb_unregister(&cx->streams[type]);
			cx->streams[type].dvb.enabled = false;
		}

		vdev = cx->streams[type].video_dev;

		cx->streams[type].video_dev = NULL;
		if (vdev == NULL)
			continue;

		cx18_stream_free(&cx->streams[type]);

		/* Unregister or release device */
		if (unregister)
			video_unregister_device(vdev);
		else
			video_device_release(vdev);
	}
}

static void cx18_vbi_setup(struct cx18_stream *s)
{
	struct cx18 *cx = s->cx;
	int raw = cx18_raw_vbi(cx);
	u32 data[CX2341X_MBOX_MAX_DATA];
	int lines;

	if (cx->is_60hz) {
		cx->vbi.count = 12;
		cx->vbi.start[0] = 10;
		cx->vbi.start[1] = 273;
	} else {        /* PAL/SECAM */
		cx->vbi.count = 18;
		cx->vbi.start[0] = 6;
		cx->vbi.start[1] = 318;
	}

	/* setup VBI registers */
	v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);

	/*
	 * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
	 * VBI when the first analog capture channel starts, as once it starts
	 * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
	 * (i.e. for the VBI capture channels).  We also send it for each
	 * analog capture channel anyway just to make sure we get the proper
	 * behavior
	 */
	if (raw) {
		lines = cx->vbi.count * 2;
	} else {
		/*
		 * For 525/60 systems, according to the VIP 2 & BT.656 std:
		 * The EAV RP code's Field bit toggles on line 4, a few lines
		 * after the Vertcal Blank bit has already toggled.
		 * Tell the encoder to capture 21-4+1=18 lines per field,
		 * since we want lines 10 through 21.
		 *
		 * For 625/50 systems, according to the VIP 2 & BT.656 std:
		 * The EAV RP code's Field bit toggles on line 1, a few lines
		 * after the Vertcal Blank bit has already toggled.
		 * (We've actually set the digitizer so that the Field bit
		 * toggles on line 2.) Tell the encoder to capture 23-2+1=22
		 * lines per field, since we want lines 6 through 23.
		 */
		lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
	}

	data[0] = s->handle;
	/* Lines per field */
	data[1] = (lines / 2) | ((lines / 2) << 16);
	/* bytes per line */
	data[2] = (raw ? vbi_active_samples
		       : (cx->is_60hz ? vbi_hblank_samples_60Hz
				      : vbi_hblank_samples_50Hz));
	/* Every X number of frames a VBI interrupt arrives
	   (frames as in 25 or 30 fps) */
	data[3] = 1;
	/*
	 * Set the SAV/EAV RP codes to look for as start/stop points
	 * when in VIP-1.1 mode
	 */
	if (raw) {
		/*
		 * Start codes for beginning of "active" line in vertical blank
		 * 0x20 (               VerticalBlank                )
		 * 0x60 (     EvenField VerticalBlank                )
		 */
		data[4] = 0x20602060;
		/*
		 * End codes for end of "active" raw lines and regular lines
		 * 0x30 (               VerticalBlank HorizontalBlank)
		 * 0x70 (     EvenField VerticalBlank HorizontalBlank)
		 * 0x90 (Task                         HorizontalBlank)
		 * 0xd0 (Task EvenField               HorizontalBlank)
		 */
		data[5] = 0x307090d0;
	} else {
		/*
		 * End codes for active video, we want data in the hblank region
		 * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
		 * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
		 *
		 * Since the V bit is only allowed to toggle in the EAV RP code,
		 * just before the first active region line, these two
		 * are problematic:
		 * 0x90 (Task                         HorizontalBlank)
		 * 0xd0 (Task EvenField               HorizontalBlank)
		 *
		 * We have set the digitzer such that we don't have to worry
		 * about these problem codes.
		 */
		data[4] = 0xB0F0B0F0;
		/*
		 * Start codes for beginning of active line in vertical blank
		 * 0xa0 (Task           VerticalBlank                )
		 * 0xe0 (Task EvenField VerticalBlank                )
		 */
		data[5] = 0xA0E0A0E0;
	}

	CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
			data[0], data[1], data[2], data[3], data[4], data[5]);

	cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
}

static
struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
					   struct cx18_mdl *mdl)
{
	struct cx18 *cx = s->cx;
	struct cx18_queue *q;

	/* Don't give it to the firmware, if we're not running a capture */
	if (s->handle == CX18_INVALID_TASK_HANDLE ||
	    test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
	    !test_bit(CX18_F_S_STREAMING, &s->s_flags))
		return cx18_enqueue(s, mdl, &s->q_free);

	q = cx18_enqueue(s, mdl, &s->q_busy);
	if (q != &s->q_busy)
		return q; /* The firmware has the max MDLs it can handle */

	cx18_mdl_sync_for_device(s, mdl);
	cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
		  (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
		  s->bufs_per_mdl, mdl->id, s->mdl_size);
	return q;
}

static
void _cx18_stream_load_fw_queue(struct cx18_stream *s)
{
	struct cx18_queue *q;
	struct cx18_mdl *mdl;

	if (atomic_read(&s->q_free.depth) == 0 ||
	    atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
		return;

	/* Move from q_free to q_busy notifying the firmware, until the limit */
	do {
		mdl = cx18_dequeue(s, &s->q_free);
		if (mdl == NULL)
			break;
		q = _cx18_stream_put_mdl_fw(s, mdl);
	} while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
		 && q == &s->q_busy);
}

void cx18_out_work_handler(struct work_struct *work)
{
	struct cx18_stream *s =
			 container_of(work, struct cx18_stream, out_work_order);

	_cx18_stream_load_fw_queue(s);
}

static void cx18_stream_configure_mdls(struct cx18_stream *s)
{
	cx18_unload_queues(s);

	switch (s->type) {
	case CX18_ENC_STREAM_TYPE_YUV:
		/*
		 * Height should be a multiple of 32 lines.
		 * Set the MDL size to the exact size needed for one frame.
		 * Use enough buffers per MDL to cover the MDL size
		 */
		s->mdl_size = 720 * s->cx->params.height * 3 / 2;
		s->bufs_per_mdl = s->mdl_size / s->buf_size;
		if (s->mdl_size % s->buf_size)
			s->bufs_per_mdl++;
		break;
	case CX18_ENC_STREAM_TYPE_VBI:
		s->bufs_per_mdl = 1;
		if  (cx18_raw_vbi(s->cx)) {
			s->mdl_size = (s->cx->is_60hz ? 12 : 18)
						       * 2 * vbi_active_samples;
		} else {
			/*
			 * See comment in cx18_vbi_setup() below about the
			 * extra lines we capture in sliced VBI mode due to
			 * the lines on which EAV RP codes toggle.
			*/
			s->mdl_size = s->cx->is_60hz
				   ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
				   : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
		}
		break;
	default:
		s->bufs_per_mdl = 1;
		s->mdl_size = s->buf_size * s->bufs_per_mdl;
		break;
	}

	cx18_load_queues(s);
}

int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
{
	u32 data[MAX_MB_ARGUMENTS];
	struct cx18 *cx = s->cx;
	int captype = 0;
	struct cx18_api_func_private priv;

	if (s->video_dev == NULL && s->dvb.enabled == 0)
		return -EINVAL;

	CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);

	switch (s->type) {
	case CX18_ENC_STREAM_TYPE_MPG:
		captype = CAPTURE_CHANNEL_TYPE_MPEG;
		cx->mpg_data_received = cx->vbi_data_inserted = 0;
		cx->dualwatch_jiffies = jiffies;
		cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
		cx->search_pack_header = 0;
		break;

	case CX18_ENC_STREAM_TYPE_TS:
		captype = CAPTURE_CHANNEL_TYPE_TS;
		break;
	case CX18_ENC_STREAM_TYPE_YUV:
		captype = CAPTURE_CHANNEL_TYPE_YUV;
		break;
	case CX18_ENC_STREAM_TYPE_PCM:
		captype = CAPTURE_CHANNEL_TYPE_PCM;
		break;
	case CX18_ENC_STREAM_TYPE_VBI:
#ifdef CX18_ENCODER_PARSES_SLICED
		captype = cx18_raw_vbi(cx) ?
		     CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
#else
		/*
		 * Currently we set things up so that Sliced VBI from the
		 * digitizer is handled as Raw VBI by the encoder
		 */
		captype = CAPTURE_CHANNEL_TYPE_VBI;
#endif
		cx->vbi.frame = 0;
		cx->vbi.inserted_frame = 0;
		memset(cx->vbi.sliced_mpeg_size,
			0, sizeof(cx->vbi.sliced_mpeg_size));
		break;
	default:
		return -EINVAL;
	}

	/* Clear Streamoff flags in case left from last capture */
	clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);

	cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
	s->handle = data[0];
	cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);

	/*
	 * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
	 * set up all the parameters, as it is not obvious which parameters the
	 * firmware shares across capture channel types and which it does not.
	 *
	 * Some of the cx18_vapi() calls below apply to only certain capture
	 * channel types.  We're hoping there's no harm in calling most of them
	 * anyway, as long as the values are all consistent.  Setting some
	 * shared parameters will have no effect once an analog capture channel
	 * has started streaming.
	 */
	if (captype != CAPTURE_CHANNEL_TYPE_TS) {
		cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);

		/*
		 * Audio related reset according to
		 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
		 */
		if (atomic_read(&cx->ana_capturing) == 0)
			cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
				  s->handle, 12);

		/*
		 * Number of lines for Field 1 & Field 2 according to
		 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
		 * Field 1 is 312 for 625 line systems in BT.656
		 * Field 2 is 313 for 625 line systems in BT.656
		 */
		cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
			  s->handle, 312, 313);

		if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
			cx18_vbi_setup(s);

		/*
		 * assign program index info.
		 * Mask 7: select I/P/B, Num_req: 400 max
		 * FIXME - currently we have this hardcoded as disabled
		 */
		cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);

		/* Call out to the common CX2341x API setup for user controls */
		priv.cx = cx;
		priv.s = s;
		cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);

		/*
		 * When starting a capture and we're set for radio,
		 * ensure the video is muted, despite the user control.
		 */
		if (!cx->params.video_mute &&
		    test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
			cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
				  (cx->params.video_mute_yuv << 8) | 1);
	}

	if (atomic_read(&cx->tot_capturing) == 0) {
		clear_bit(CX18_F_I_EOS, &cx->i_flags);
		cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
	}

	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
		(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
		(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);

	/* Init all the cpu_mdls for this stream */
	cx18_stream_configure_mdls(s);
	_cx18_stream_load_fw_queue(s);

	/* begin_capture */
	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
		CX18_DEBUG_WARN("Error starting capture!\n");
		/* Ensure we're really not capturing before releasing MDLs */
		set_bit(CX18_F_S_STOPPING, &s->s_flags);
		if (s->type == CX18_ENC_STREAM_TYPE_MPG)
			cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
		else
			cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
		clear_bit(CX18_F_S_STREAMING, &s->s_flags);
		/* FIXME - CX18_F_S_STREAMOFF as well? */
		cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
		cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
		s->handle = CX18_INVALID_TASK_HANDLE;
		clear_bit(CX18_F_S_STOPPING, &s->s_flags);
		if (atomic_read(&cx->tot_capturing) == 0) {
			set_bit(CX18_F_I_EOS, &cx->i_flags);
			cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
		}
		return -EINVAL;
	}

	/* you're live! sit back and await interrupts :) */
	if (captype != CAPTURE_CHANNEL_TYPE_TS)
		atomic_inc(&cx->ana_capturing);
	atomic_inc(&cx->tot_capturing);
	return 0;
}

void cx18_stop_all_captures(struct cx18 *cx)
{
	int i;

	for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
		struct cx18_stream *s = &cx->streams[i];

		if (s->video_dev == NULL && s->dvb.enabled == 0)
			continue;
		if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
			cx18_stop_v4l2_encode_stream(s, 0);
	}
}

int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
{
	struct cx18 *cx = s->cx;
	unsigned long then;

	if (s->video_dev == NULL && s->dvb.enabled == 0)
		return -EINVAL;

	/* This function assumes that you are allowed to stop the capture
	   and that we are actually capturing */

	CX18_DEBUG_INFO("Stop Capture\n");

	if (atomic_read(&cx->tot_capturing) == 0)
		return 0;

	set_bit(CX18_F_S_STOPPING, &s->s_flags);
	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
		cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
	else
		cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);

	then = jiffies;

	if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
		CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
	}

	if (s->type != CX18_ENC_STREAM_TYPE_TS)
		atomic_dec(&cx->ana_capturing);
	atomic_dec(&cx->tot_capturing);

	/* Clear capture and no-read bits */
	clear_bit(CX18_F_S_STREAMING, &s->s_flags);

	/* Tell the CX23418 it can't use our buffers anymore */
	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);

	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
	s->handle = CX18_INVALID_TASK_HANDLE;
	clear_bit(CX18_F_S_STOPPING, &s->s_flags);

	if (atomic_read(&cx->tot_capturing) > 0)
		return 0;

	cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
	wake_up(&s->waitq);

	return 0;
}

u32 cx18_find_handle(struct cx18 *cx)
{
	int i;

	/* find first available handle to be used for global settings */
	for (i = 0; i < CX18_MAX_STREAMS; i++) {
		struct cx18_stream *s = &cx->streams[i];

		if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
			return s->handle;
	}
	return CX18_INVALID_TASK_HANDLE;
}

struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
{
	int i;
	struct cx18_stream *s;

	if (handle == CX18_INVALID_TASK_HANDLE)
		return NULL;

	for (i = 0; i < CX18_MAX_STREAMS; i++) {
		s = &cx->streams[i];
		if (s->handle != handle)
			continue;
		if (s->video_dev || s->dvb.enabled)
			return s;
	}
	return NULL;
}
OpenPOWER on IntegriCloud