xref: /linux/drivers/media/pci/ivtv/ivtv-streams.c (revision 0526b56cbc3c489642bd6a5fe4b718dea7ef0ee8)
1 /*
2     init/start/stop/exit stream functions
3     Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
4     Copyright (C) 2004  Chris Kennedy <c@groovy.org>
5     Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
6 
7     This program is free software; you can redistribute it and/or modify
8     it under the terms of the GNU General Public License as published by
9     the Free Software Foundation; either version 2 of the License, or
10     (at your option) any later version.
11 
12     This program is distributed in the hope that it will be useful,
13     but WITHOUT ANY WARRANTY; without even the implied warranty of
14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15     GNU General Public License for more details.
16 
17     You should have received a copy of the GNU General Public License
18     along with this program; if not, write to the Free Software
19     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  */
21 
22 /* License: GPL
23  * Author: Kevin Thayer <nufan_wfk at yahoo dot com>
24  *
25  * This file will hold API related functions, both internal (firmware api)
26  * and external (v4l2, etc)
27  *
28  * -----
29  * MPG600/MPG160 support by  T.Adachi <tadachi@tadachi-net.com>
30  *                      and Takeru KOMORIYA<komoriya@paken.org>
31  *
32  * AVerMedia M179 GPIO info by Chris Pinkham <cpinkham@bc2va.org>
33  *                using information provided by Jiun-Kuei Jung @ AVerMedia.
34  */
35 
36 #include "ivtv-driver.h"
37 #include "ivtv-fileops.h"
38 #include "ivtv-queue.h"
39 #include "ivtv-mailbox.h"
40 #include "ivtv-ioctl.h"
41 #include "ivtv-irq.h"
42 #include "ivtv-yuv.h"
43 #include "ivtv-cards.h"
44 #include "ivtv-streams.h"
45 #include "ivtv-firmware.h"
46 #include <media/v4l2-event.h>
47 
48 static const struct v4l2_file_operations ivtv_v4l2_enc_fops = {
49 	.owner = THIS_MODULE,
50 	.read = ivtv_v4l2_read,
51 	.write = ivtv_v4l2_write,
52 	.open = ivtv_v4l2_open,
53 	.unlocked_ioctl = video_ioctl2,
54 #ifdef CONFIG_COMPAT
55 	.compat_ioctl32 = video_ioctl2, /* for ivtv_default() */
56 #endif
57 	.release = ivtv_v4l2_close,
58 	.poll = ivtv_v4l2_enc_poll,
59 };
60 
61 static const struct v4l2_file_operations ivtv_v4l2_dec_fops = {
62 	.owner = THIS_MODULE,
63 	.read = ivtv_v4l2_read,
64 	.write = ivtv_v4l2_write,
65 	.open = ivtv_v4l2_open,
66 	.unlocked_ioctl = video_ioctl2,
67 #ifdef CONFIG_COMPAT
68 	.compat_ioctl32 = video_ioctl2, /* for ivtv_default() */
69 #endif
70 	.release = ivtv_v4l2_close,
71 	.poll = ivtv_v4l2_dec_poll,
72 };
73 
74 static const struct v4l2_file_operations ivtv_v4l2_radio_fops = {
75 	.owner = THIS_MODULE,
76 	.open = ivtv_v4l2_open,
77 	.unlocked_ioctl = video_ioctl2,
78 #ifdef CONFIG_COMPAT
79 	.compat_ioctl32 = video_ioctl2, /* for ivtv_default() */
80 #endif
81 	.release = ivtv_v4l2_close,
82 	.poll = ivtv_v4l2_enc_poll,
83 };
84 
85 #define IVTV_V4L2_DEC_MPG_OFFSET  16	/* offset from 0 to register decoder mpg v4l2 minors on */
86 #define IVTV_V4L2_ENC_PCM_OFFSET  24	/* offset from 0 to register pcm v4l2 minors on */
87 #define IVTV_V4L2_ENC_YUV_OFFSET  32	/* offset from 0 to register yuv v4l2 minors on */
88 #define IVTV_V4L2_DEC_YUV_OFFSET  48	/* offset from 0 to register decoder yuv v4l2 minors on */
89 #define IVTV_V4L2_DEC_VBI_OFFSET   8	/* offset from 0 to register decoder vbi input v4l2 minors on */
90 #define IVTV_V4L2_DEC_VOUT_OFFSET 16	/* offset from 0 to register vbi output v4l2 minors on */
91 
92 static struct {
93 	const char *name;
94 	int vfl_type;
95 	int num_offset;
96 	int dma, pio;
97 	u32 v4l2_caps;
98 	const struct v4l2_file_operations *fops;
99 } ivtv_stream_info[] = {
100 	{	/* IVTV_ENC_STREAM_TYPE_MPG */
101 		"encoder MPG",
102 		VFL_TYPE_VIDEO, 0,
103 		DMA_FROM_DEVICE, 0,
104 		V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER |
105 			V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
106 		&ivtv_v4l2_enc_fops
107 	},
108 	{	/* IVTV_ENC_STREAM_TYPE_YUV */
109 		"encoder YUV",
110 		VFL_TYPE_VIDEO, IVTV_V4L2_ENC_YUV_OFFSET,
111 		DMA_FROM_DEVICE, 0,
112 		V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER |
113 			V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
114 		&ivtv_v4l2_enc_fops
115 	},
116 	{	/* IVTV_ENC_STREAM_TYPE_VBI */
117 		"encoder VBI",
118 		VFL_TYPE_VBI, 0,
119 		DMA_FROM_DEVICE, 0,
120 		V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE | V4L2_CAP_TUNER |
121 			V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
122 		&ivtv_v4l2_enc_fops
123 	},
124 	{	/* IVTV_ENC_STREAM_TYPE_PCM */
125 		"encoder PCM",
126 		VFL_TYPE_VIDEO, IVTV_V4L2_ENC_PCM_OFFSET,
127 		DMA_FROM_DEVICE, 0,
128 		V4L2_CAP_TUNER | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
129 		&ivtv_v4l2_enc_fops
130 	},
131 	{	/* IVTV_ENC_STREAM_TYPE_RAD */
132 		"encoder radio",
133 		VFL_TYPE_RADIO, 0,
134 		DMA_NONE, 1,
135 		V4L2_CAP_RADIO | V4L2_CAP_TUNER,
136 		&ivtv_v4l2_radio_fops
137 	},
138 	{	/* IVTV_DEC_STREAM_TYPE_MPG */
139 		"decoder MPG",
140 		VFL_TYPE_VIDEO, IVTV_V4L2_DEC_MPG_OFFSET,
141 		DMA_TO_DEVICE, 0,
142 		V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
143 		&ivtv_v4l2_dec_fops
144 	},
145 	{	/* IVTV_DEC_STREAM_TYPE_VBI */
146 		"decoder VBI",
147 		VFL_TYPE_VBI, IVTV_V4L2_DEC_VBI_OFFSET,
148 		DMA_NONE, 1,
149 		V4L2_CAP_SLICED_VBI_CAPTURE | V4L2_CAP_READWRITE,
150 		&ivtv_v4l2_enc_fops
151 	},
152 	{	/* IVTV_DEC_STREAM_TYPE_VOUT */
153 		"decoder VOUT",
154 		VFL_TYPE_VBI, IVTV_V4L2_DEC_VOUT_OFFSET,
155 		DMA_NONE, 1,
156 		V4L2_CAP_SLICED_VBI_OUTPUT | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
157 		&ivtv_v4l2_dec_fops
158 	},
159 	{	/* IVTV_DEC_STREAM_TYPE_YUV */
160 		"decoder YUV",
161 		VFL_TYPE_VIDEO, IVTV_V4L2_DEC_YUV_OFFSET,
162 		DMA_TO_DEVICE, 0,
163 		V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
164 		&ivtv_v4l2_dec_fops
165 	}
166 };
167 
168 static void ivtv_stream_init(struct ivtv *itv, int type)
169 {
170 	struct ivtv_stream *s = &itv->streams[type];
171 
172 	/* we need to keep vdev, so restore it afterwards */
173 	memset(s, 0, sizeof(*s));
174 
175 	/* initialize ivtv_stream fields */
176 	s->itv = itv;
177 	s->type = type;
178 	s->name = ivtv_stream_info[type].name;
179 	s->vdev.device_caps = ivtv_stream_info[type].v4l2_caps;
180 
181 	if (ivtv_stream_info[type].pio)
182 		s->dma = DMA_NONE;
183 	else
184 		s->dma = ivtv_stream_info[type].dma;
185 	s->buf_size = itv->stream_buf_size[type];
186 	if (s->buf_size)
187 		s->buffers = (itv->options.kilobytes[type] * 1024 + s->buf_size - 1) / s->buf_size;
188 	spin_lock_init(&s->qlock);
189 	init_waitqueue_head(&s->waitq);
190 	s->sg_handle = IVTV_DMA_UNMAPPED;
191 	ivtv_queue_init(&s->q_free);
192 	ivtv_queue_init(&s->q_full);
193 	ivtv_queue_init(&s->q_dma);
194 	ivtv_queue_init(&s->q_predma);
195 	ivtv_queue_init(&s->q_io);
196 }
197 
198 static int ivtv_prep_dev(struct ivtv *itv, int type)
199 {
200 	struct ivtv_stream *s = &itv->streams[type];
201 	int num_offset = ivtv_stream_info[type].num_offset;
202 	int num = itv->instance + ivtv_first_minor + num_offset;
203 
204 	/* These four fields are always initialized. If vdev.v4l2_dev == NULL, then
205 	   this stream is not in use. In that case no other fields but these
206 	   four can be used. */
207 	s->vdev.v4l2_dev = NULL;
208 	s->itv = itv;
209 	s->type = type;
210 	s->name = ivtv_stream_info[type].name;
211 
212 	/* Check whether the radio is supported */
213 	if (type == IVTV_ENC_STREAM_TYPE_RAD && !(itv->v4l2_cap & V4L2_CAP_RADIO))
214 		return 0;
215 	if (type >= IVTV_DEC_STREAM_TYPE_MPG && !(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
216 		return 0;
217 
218 	/* User explicitly selected 0 buffers for these streams, so don't
219 	   create them. */
220 	if (ivtv_stream_info[type].dma != DMA_NONE &&
221 	    itv->options.kilobytes[type] == 0) {
222 		IVTV_INFO("Disabled %s device\n", ivtv_stream_info[type].name);
223 		return 0;
224 	}
225 
226 	ivtv_stream_init(itv, type);
227 
228 	snprintf(s->vdev.name, sizeof(s->vdev.name), "%s %s",
229 			itv->v4l2_dev.name, s->name);
230 
231 	s->vdev.num = num;
232 	s->vdev.v4l2_dev = &itv->v4l2_dev;
233 	if (ivtv_stream_info[type].v4l2_caps &
234 			(V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_SLICED_VBI_OUTPUT))
235 		s->vdev.vfl_dir = VFL_DIR_TX;
236 	s->vdev.fops = ivtv_stream_info[type].fops;
237 	s->vdev.ctrl_handler = itv->v4l2_dev.ctrl_handler;
238 	s->vdev.release = video_device_release_empty;
239 	s->vdev.tvnorms = V4L2_STD_ALL;
240 	s->vdev.lock = &itv->serialize_lock;
241 	if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
242 		v4l2_disable_ioctl(&s->vdev, VIDIOC_S_AUDIO);
243 		v4l2_disable_ioctl(&s->vdev, VIDIOC_G_AUDIO);
244 		v4l2_disable_ioctl(&s->vdev, VIDIOC_ENUMAUDIO);
245 		v4l2_disable_ioctl(&s->vdev, VIDIOC_ENUMINPUT);
246 		v4l2_disable_ioctl(&s->vdev, VIDIOC_S_INPUT);
247 		v4l2_disable_ioctl(&s->vdev, VIDIOC_G_INPUT);
248 		v4l2_disable_ioctl(&s->vdev, VIDIOC_S_FREQUENCY);
249 		v4l2_disable_ioctl(&s->vdev, VIDIOC_G_FREQUENCY);
250 		v4l2_disable_ioctl(&s->vdev, VIDIOC_S_TUNER);
251 		v4l2_disable_ioctl(&s->vdev, VIDIOC_G_TUNER);
252 		v4l2_disable_ioctl(&s->vdev, VIDIOC_S_STD);
253 	}
254 	ivtv_set_funcs(&s->vdev);
255 	return 0;
256 }
257 
258 /* Initialize v4l2 variables and prepare v4l2 devices */
259 int ivtv_streams_setup(struct ivtv *itv)
260 {
261 	int type;
262 
263 	/* Setup V4L2 Devices */
264 	for (type = 0; type < IVTV_MAX_STREAMS; type++) {
265 		/* Prepare device */
266 		if (ivtv_prep_dev(itv, type))
267 			break;
268 
269 		if (itv->streams[type].vdev.v4l2_dev == NULL)
270 			continue;
271 
272 		/* Allocate Stream */
273 		if (ivtv_stream_alloc(&itv->streams[type]))
274 			break;
275 	}
276 	if (type == IVTV_MAX_STREAMS)
277 		return 0;
278 
279 	/* One or more streams could not be initialized. Clean 'em all up. */
280 	ivtv_streams_cleanup(itv);
281 	return -ENOMEM;
282 }
283 
284 static int ivtv_reg_dev(struct ivtv *itv, int type)
285 {
286 	struct ivtv_stream *s = &itv->streams[type];
287 	int vfl_type = ivtv_stream_info[type].vfl_type;
288 	const char *name;
289 	int num;
290 
291 	if (s->vdev.v4l2_dev == NULL)
292 		return 0;
293 
294 	num = s->vdev.num;
295 	/* card number + user defined offset + device offset */
296 	if (type != IVTV_ENC_STREAM_TYPE_MPG) {
297 		struct ivtv_stream *s_mpg = &itv->streams[IVTV_ENC_STREAM_TYPE_MPG];
298 
299 		if (s_mpg->vdev.v4l2_dev)
300 			num = s_mpg->vdev.num + ivtv_stream_info[type].num_offset;
301 	}
302 	if (itv->osd_video_pbase && (type == IVTV_DEC_STREAM_TYPE_YUV ||
303 				     type == IVTV_DEC_STREAM_TYPE_MPG)) {
304 		s->vdev.device_caps |= V4L2_CAP_VIDEO_OUTPUT_OVERLAY;
305 		itv->v4l2_cap |= V4L2_CAP_VIDEO_OUTPUT_OVERLAY;
306 	}
307 	video_set_drvdata(&s->vdev, s);
308 
309 	/* Register device. First try the desired minor, then any free one. */
310 	if (video_register_device_no_warn(&s->vdev, vfl_type, num)) {
311 		IVTV_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
312 				s->name, num);
313 		return -ENOMEM;
314 	}
315 	name = video_device_node_name(&s->vdev);
316 
317 	switch (vfl_type) {
318 	case VFL_TYPE_VIDEO:
319 		IVTV_INFO("Registered device %s for %s (%d kB)\n",
320 			name, s->name, itv->options.kilobytes[type]);
321 		break;
322 	case VFL_TYPE_RADIO:
323 		IVTV_INFO("Registered device %s for %s\n",
324 			name, s->name);
325 		break;
326 	case VFL_TYPE_VBI:
327 		if (itv->options.kilobytes[type])
328 			IVTV_INFO("Registered device %s for %s (%d kB)\n",
329 				name, s->name, itv->options.kilobytes[type]);
330 		else
331 			IVTV_INFO("Registered device %s for %s\n",
332 				name, s->name);
333 		break;
334 	}
335 	return 0;
336 }
337 
338 /* Register v4l2 devices */
339 int ivtv_streams_register(struct ivtv *itv)
340 {
341 	int type;
342 	int err = 0;
343 
344 	/* Register V4L2 devices */
345 	for (type = 0; type < IVTV_MAX_STREAMS; type++)
346 		err |= ivtv_reg_dev(itv, type);
347 
348 	if (err == 0)
349 		return 0;
350 
351 	/* One or more streams could not be initialized. Clean 'em all up. */
352 	ivtv_streams_cleanup(itv);
353 	return -ENOMEM;
354 }
355 
356 /* Unregister v4l2 devices */
357 void ivtv_streams_cleanup(struct ivtv *itv)
358 {
359 	int type;
360 
361 	/* Teardown all streams */
362 	for (type = 0; type < IVTV_MAX_STREAMS; type++) {
363 		struct video_device *vdev = &itv->streams[type].vdev;
364 
365 		if (vdev->v4l2_dev == NULL)
366 			continue;
367 
368 		video_unregister_device(vdev);
369 		ivtv_stream_free(&itv->streams[type]);
370 		itv->streams[type].vdev.v4l2_dev = NULL;
371 	}
372 }
373 
374 static void ivtv_vbi_setup(struct ivtv *itv)
375 {
376 	int raw = ivtv_raw_vbi(itv);
377 	u32 data[CX2341X_MBOX_MAX_DATA];
378 	int lines;
379 	int i;
380 
381 	/* Reset VBI */
382 	ivtv_vapi(itv, CX2341X_ENC_SET_VBI_LINE, 5, 0xffff , 0, 0, 0, 0);
383 
384 	/* setup VBI registers */
385 	if (raw)
386 		v4l2_subdev_call(itv->sd_video, vbi, s_raw_fmt, &itv->vbi.in.fmt.vbi);
387 	else
388 		v4l2_subdev_call(itv->sd_video, vbi, s_sliced_fmt, &itv->vbi.in.fmt.sliced);
389 
390 	/* determine number of lines and total number of VBI bytes.
391 	   A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
392 	   The '- 1' byte is probably an unused U or V byte. Or something...
393 	   A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
394 	   header, 42 data bytes + checksum (to be confirmed) */
395 	if (raw) {
396 		lines = itv->vbi.count * 2;
397 	} else {
398 		lines = itv->is_60hz ? 24 : 38;
399 		if (itv->is_60hz && (itv->hw_flags & IVTV_HW_CX25840))
400 			lines += 2;
401 	}
402 
403 	itv->vbi.enc_size = lines * (raw ? itv->vbi.raw_size : itv->vbi.sliced_size);
404 
405 	/* Note: sliced vs raw flag doesn't seem to have any effect
406 	   TODO: check mode (0x02) value with older ivtv versions. */
407 	data[0] = raw | 0x02 | (0xbd << 8);
408 
409 	/* Every X number of frames a VBI interrupt arrives (frames as in 25 or 30 fps) */
410 	data[1] = 1;
411 	/* The VBI frames are stored in a ringbuffer with this size (with a VBI frame as unit) */
412 	data[2] = raw ? 4 : 4 * (itv->vbi.raw_size / itv->vbi.enc_size);
413 	/* The start/stop codes determine which VBI lines end up in the raw VBI data area.
414 	   The codes are from table 24 in the saa7115 datasheet. Each raw/sliced/video line
415 	   is framed with codes FF0000XX where XX is the SAV/EAV (Start/End of Active Video)
416 	   code. These values for raw VBI are obtained from a driver disassembly. The sliced
417 	   start/stop codes was deduced from this, but they do not appear in the driver.
418 	   Other code pairs that I found are: 0x250E6249/0x13545454 and 0x25256262/0x38137F54.
419 	   However, I have no idea what these values are for. */
420 	if (itv->hw_flags & IVTV_HW_CX25840) {
421 		/* Setup VBI for the cx25840 digitizer */
422 		if (raw) {
423 			data[3] = 0x20602060;
424 			data[4] = 0x30703070;
425 		} else {
426 			data[3] = 0xB0F0B0F0;
427 			data[4] = 0xA0E0A0E0;
428 		}
429 		/* Lines per frame */
430 		data[5] = lines;
431 		/* bytes per line */
432 		data[6] = (raw ? itv->vbi.raw_size : itv->vbi.sliced_size);
433 	} else {
434 		/* Setup VBI for the saa7115 digitizer */
435 		if (raw) {
436 			data[3] = 0x25256262;
437 			data[4] = 0x387F7F7F;
438 		} else {
439 			data[3] = 0xABABECEC;
440 			data[4] = 0xB6F1F1F1;
441 		}
442 		/* Lines per frame */
443 		data[5] = lines;
444 		/* bytes per line */
445 		data[6] = itv->vbi.enc_size / lines;
446 	}
447 
448 	IVTV_DEBUG_INFO(
449 		"Setup VBI API header 0x%08x pkts %d buffs %d ln %d sz %d\n",
450 			data[0], data[1], data[2], data[5], data[6]);
451 
452 	ivtv_api(itv, CX2341X_ENC_SET_VBI_CONFIG, 7, data);
453 
454 	/* returns the VBI encoder memory area. */
455 	itv->vbi.enc_start = data[2];
456 	itv->vbi.fpi = data[0];
457 	if (!itv->vbi.fpi)
458 		itv->vbi.fpi = 1;
459 
460 	IVTV_DEBUG_INFO("Setup VBI start 0x%08x frames %d fpi %d\n",
461 		itv->vbi.enc_start, data[1], itv->vbi.fpi);
462 
463 	/* select VBI lines.
464 	   Note that the sliced argument seems to have no effect. */
465 	for (i = 2; i <= 24; i++) {
466 		int valid;
467 
468 		if (itv->is_60hz) {
469 			valid = i >= 10 && i < 22;
470 		} else {
471 			valid = i >= 6 && i < 24;
472 		}
473 		ivtv_vapi(itv, CX2341X_ENC_SET_VBI_LINE, 5, i - 1,
474 				valid, 0 , 0, 0);
475 		ivtv_vapi(itv, CX2341X_ENC_SET_VBI_LINE, 5, (i - 1) | 0x80000000,
476 				valid, 0, 0, 0);
477 	}
478 
479 	/* Remaining VBI questions:
480 	   - Is it possible to select particular VBI lines only for inclusion in the MPEG
481 	   stream? Currently you can only get the first X lines.
482 	   - Is mixed raw and sliced VBI possible?
483 	   - What's the meaning of the raw/sliced flag?
484 	   - What's the meaning of params 2, 3 & 4 of the Select VBI command? */
485 }
486 
487 int ivtv_start_v4l2_encode_stream(struct ivtv_stream *s)
488 {
489 	u32 data[CX2341X_MBOX_MAX_DATA];
490 	struct ivtv *itv = s->itv;
491 	int captype = 0, subtype = 0;
492 	int enable_passthrough = 0;
493 
494 	if (s->vdev.v4l2_dev == NULL)
495 		return -EINVAL;
496 
497 	IVTV_DEBUG_INFO("Start encoder stream %s\n", s->name);
498 
499 	switch (s->type) {
500 	case IVTV_ENC_STREAM_TYPE_MPG:
501 		captype = 0;
502 		subtype = 3;
503 
504 		/* Stop Passthrough */
505 		if (itv->output_mode == OUT_PASSTHROUGH) {
506 			ivtv_passthrough_mode(itv, 0);
507 			enable_passthrough = 1;
508 		}
509 		itv->mpg_data_received = itv->vbi_data_inserted = 0;
510 		itv->dualwatch_jiffies = jiffies;
511 		itv->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode);
512 		itv->search_pack_header = 0;
513 		break;
514 
515 	case IVTV_ENC_STREAM_TYPE_YUV:
516 		if (itv->output_mode == OUT_PASSTHROUGH) {
517 			captype = 2;
518 			subtype = 11;	/* video+audio+decoder */
519 			break;
520 		}
521 		captype = 1;
522 		subtype = 1;
523 		break;
524 	case IVTV_ENC_STREAM_TYPE_PCM:
525 		captype = 1;
526 		subtype = 2;
527 		break;
528 	case IVTV_ENC_STREAM_TYPE_VBI:
529 		captype = 1;
530 		subtype = 4;
531 
532 		itv->vbi.frame = 0;
533 		itv->vbi.inserted_frame = 0;
534 		memset(itv->vbi.sliced_mpeg_size,
535 			0, sizeof(itv->vbi.sliced_mpeg_size));
536 		break;
537 	default:
538 		return -EINVAL;
539 	}
540 	s->subtype = subtype;
541 	s->buffers_stolen = 0;
542 
543 	/* Clear Streamoff flags in case left from last capture */
544 	clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
545 
546 	if (atomic_read(&itv->capturing) == 0) {
547 		int digitizer;
548 
549 		/* Always use frame based mode. Experiments have demonstrated that byte
550 		   stream based mode results in dropped frames and corruption. Not often,
551 		   but occasionally. Many thanks go to Leonard Orb who spent a lot of
552 		   effort and time trying to trace the cause of the drop outs. */
553 		/* 1 frame per DMA */
554 		/*ivtv_vapi(itv, CX2341X_ENC_SET_DMA_BLOCK_SIZE, 2, 128, 0); */
555 		ivtv_vapi(itv, CX2341X_ENC_SET_DMA_BLOCK_SIZE, 2, 1, 1);
556 
557 		/* Stuff from Windows, we don't know what it is */
558 		ivtv_vapi(itv, CX2341X_ENC_SET_VERT_CROP_LINE, 1, 0);
559 		/* According to the docs, this should be correct. However, this is
560 		   untested. I don't dare enable this without having tested it.
561 		   Only very few old cards actually have this hardware combination.
562 		ivtv_vapi(itv, CX2341X_ENC_SET_VERT_CROP_LINE, 1,
563 			((itv->hw_flags & IVTV_HW_SAA7114) && itv->is_60hz) ? 10001 : 0);
564 		*/
565 		ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 3, !itv->has_cx23415);
566 		ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 8, 0);
567 		ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 4, 1);
568 		ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
569 
570 		/* assign placeholder */
571 		ivtv_vapi(itv, CX2341X_ENC_SET_PLACEHOLDER, 12,
572 			0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
573 
574 		if (itv->card->hw_all & (IVTV_HW_SAA7115 | IVTV_HW_SAA717X))
575 		    digitizer = 0xF1;
576 		else if (itv->card->hw_all & IVTV_HW_SAA7114)
577 		    digitizer = 0xEF;
578 		else /* cx25840 */
579 		    digitizer = 0x140;
580 
581 		ivtv_vapi(itv, CX2341X_ENC_SET_NUM_VSYNC_LINES, 2, digitizer, digitizer);
582 
583 		/* Setup VBI */
584 		if (itv->v4l2_cap & V4L2_CAP_VBI_CAPTURE) {
585 			ivtv_vbi_setup(itv);
586 		}
587 
588 		/* assign program index info. Mask 7: select I/P/B, Num_req: 400 max */
589 		ivtv_vapi_result(itv, data, CX2341X_ENC_SET_PGM_INDEX_INFO, 2, 7, 400);
590 		itv->pgm_info_offset = data[0];
591 		itv->pgm_info_num = data[1];
592 		itv->pgm_info_write_idx = 0;
593 		itv->pgm_info_read_idx = 0;
594 
595 		IVTV_DEBUG_INFO("PGM Index at 0x%08x with %d elements\n",
596 				itv->pgm_info_offset, itv->pgm_info_num);
597 
598 		/* Setup API for Stream */
599 		cx2341x_handler_setup(&itv->cxhdl);
600 
601 		/* mute if capturing radio */
602 		if (test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags))
603 			ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1,
604 				1 | (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8));
605 	}
606 
607 	/* Vsync Setup */
608 	if (itv->has_cx23415 && !test_and_set_bit(IVTV_F_I_DIG_RST, &itv->i_flags)) {
609 		/* event notification (on) */
610 		ivtv_vapi(itv, CX2341X_ENC_SET_EVENT_NOTIFICATION, 4, 0, 1, IVTV_IRQ_ENC_VIM_RST, -1);
611 		ivtv_clear_irq_mask(itv, IVTV_IRQ_ENC_VIM_RST);
612 	}
613 
614 	if (atomic_read(&itv->capturing) == 0) {
615 		/* Clear all Pending Interrupts */
616 		ivtv_set_irq_mask(itv, IVTV_IRQ_MASK_CAPTURE);
617 
618 		clear_bit(IVTV_F_I_EOS, &itv->i_flags);
619 
620 		cx2341x_handler_set_busy(&itv->cxhdl, 1);
621 
622 		/* Initialize Digitizer for Capture */
623 		/* Avoid tinny audio problem - ensure audio clocks are going */
624 		v4l2_subdev_call(itv->sd_audio, audio, s_stream, 1);
625 		/* Avoid unpredictable PCI bus hang - disable video clocks */
626 		v4l2_subdev_call(itv->sd_video, video, s_stream, 0);
627 		ivtv_msleep_timeout(300, 0);
628 		ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
629 		v4l2_subdev_call(itv->sd_video, video, s_stream, 1);
630 	}
631 
632 	/* begin_capture */
633 	if (ivtv_vapi(itv, CX2341X_ENC_START_CAPTURE, 2, captype, subtype))
634 	{
635 		IVTV_DEBUG_WARN( "Error starting capture!\n");
636 		return -EINVAL;
637 	}
638 
639 	/* Start Passthrough */
640 	if (enable_passthrough) {
641 		ivtv_passthrough_mode(itv, 1);
642 	}
643 
644 	if (s->type == IVTV_ENC_STREAM_TYPE_VBI)
645 		ivtv_clear_irq_mask(itv, IVTV_IRQ_ENC_VBI_CAP);
646 	else
647 		ivtv_clear_irq_mask(itv, IVTV_IRQ_MASK_CAPTURE);
648 
649 	/* you're live! sit back and await interrupts :) */
650 	atomic_inc(&itv->capturing);
651 	return 0;
652 }
653 EXPORT_SYMBOL(ivtv_start_v4l2_encode_stream);
654 
655 static int ivtv_setup_v4l2_decode_stream(struct ivtv_stream *s)
656 {
657 	u32 data[CX2341X_MBOX_MAX_DATA];
658 	struct ivtv *itv = s->itv;
659 	int datatype;
660 	u16 width;
661 	u16 height;
662 
663 	if (s->vdev.v4l2_dev == NULL)
664 		return -EINVAL;
665 
666 	IVTV_DEBUG_INFO("Setting some initial decoder settings\n");
667 
668 	width = itv->cxhdl.width;
669 	height = itv->cxhdl.height;
670 
671 	/* set audio mode to left/stereo  for dual/stereo mode. */
672 	ivtv_vapi(itv, CX2341X_DEC_SET_AUDIO_MODE, 2, itv->audio_bilingual_mode, itv->audio_stereo_mode);
673 
674 	/* set number of internal decoder buffers */
675 	ivtv_vapi(itv, CX2341X_DEC_SET_DISPLAY_BUFFERS, 1, 0);
676 
677 	/* prebuffering */
678 	ivtv_vapi(itv, CX2341X_DEC_SET_PREBUFFERING, 1, 1);
679 
680 	/* extract from user packets */
681 	ivtv_vapi_result(itv, data, CX2341X_DEC_EXTRACT_VBI, 1, 1);
682 	itv->vbi.dec_start = data[0];
683 
684 	IVTV_DEBUG_INFO("Decoder VBI RE-Insert start 0x%08x size 0x%08x\n",
685 		itv->vbi.dec_start, data[1]);
686 
687 	/* set decoder source settings */
688 	/* Data type: 0 = mpeg from host,
689 	   1 = yuv from encoder,
690 	   2 = yuv_from_host */
691 	switch (s->type) {
692 	case IVTV_DEC_STREAM_TYPE_YUV:
693 		if (itv->output_mode == OUT_PASSTHROUGH) {
694 			datatype = 1;
695 		} else {
696 			/* Fake size to avoid switching video standard */
697 			datatype = 2;
698 			width = 720;
699 			height = itv->is_out_50hz ? 576 : 480;
700 		}
701 		IVTV_DEBUG_INFO("Setup DEC YUV Stream data[0] = %d\n", datatype);
702 		break;
703 	case IVTV_DEC_STREAM_TYPE_MPG:
704 	default:
705 		datatype = 0;
706 		break;
707 	}
708 	if (ivtv_vapi(itv, CX2341X_DEC_SET_DECODER_SOURCE, 4, datatype,
709 			width, height, itv->cxhdl.audio_properties)) {
710 		IVTV_DEBUG_WARN("Couldn't initialize decoder source\n");
711 	}
712 
713 	/* Decoder sometimes dies here, so wait a moment */
714 	ivtv_msleep_timeout(10, 0);
715 
716 	/* Known failure point for firmware, so check */
717 	return ivtv_firmware_check(itv, "ivtv_setup_v4l2_decode_stream");
718 }
719 
720 int ivtv_start_v4l2_decode_stream(struct ivtv_stream *s, int gop_offset)
721 {
722 	struct ivtv *itv = s->itv;
723 	int rc;
724 
725 	if (s->vdev.v4l2_dev == NULL)
726 		return -EINVAL;
727 
728 	if (test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags))
729 		return 0;	/* already started */
730 
731 	IVTV_DEBUG_INFO("Starting decode stream %s (gop_offset %d)\n", s->name, gop_offset);
732 
733 	rc = ivtv_setup_v4l2_decode_stream(s);
734 	if (rc < 0) {
735 		clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
736 		return rc;
737 	}
738 
739 	/* set dma size to 65536 bytes */
740 	ivtv_vapi(itv, CX2341X_DEC_SET_DMA_BLOCK_SIZE, 1, 65536);
741 
742 	/* Clear Streamoff */
743 	clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
744 
745 	/* Zero out decoder counters */
746 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[0]);
747 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[1]);
748 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[2]);
749 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[3]);
750 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[0]);
751 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[1]);
752 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[2]);
753 	writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[3]);
754 
755 	/* turn on notification of dual/stereo mode change */
756 	ivtv_vapi(itv, CX2341X_DEC_SET_EVENT_NOTIFICATION, 4, 0, 1, IVTV_IRQ_DEC_AUD_MODE_CHG, -1);
757 
758 	/* start playback */
759 	ivtv_vapi(itv, CX2341X_DEC_START_PLAYBACK, 2, gop_offset, 0);
760 
761 	/* Let things settle before we actually start */
762 	ivtv_msleep_timeout(10, 0);
763 
764 	/* Clear the following Interrupt mask bits for decoding */
765 	ivtv_clear_irq_mask(itv, IVTV_IRQ_MASK_DECODE);
766 	IVTV_DEBUG_IRQ("IRQ Mask is now: 0x%08x\n", itv->irqmask);
767 
768 	/* you're live! sit back and await interrupts :) */
769 	atomic_inc(&itv->decoding);
770 	return 0;
771 }
772 
773 void ivtv_stop_all_captures(struct ivtv *itv)
774 {
775 	int i;
776 
777 	for (i = IVTV_MAX_STREAMS - 1; i >= 0; i--) {
778 		struct ivtv_stream *s = &itv->streams[i];
779 
780 		if (s->vdev.v4l2_dev == NULL)
781 			continue;
782 		if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
783 			ivtv_stop_v4l2_encode_stream(s, 0);
784 		}
785 	}
786 }
787 
788 int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end)
789 {
790 	struct ivtv *itv = s->itv;
791 	DECLARE_WAITQUEUE(wait, current);
792 	int cap_type;
793 	int stopmode;
794 
795 	if (s->vdev.v4l2_dev == NULL)
796 		return -EINVAL;
797 
798 	/* This function assumes that you are allowed to stop the capture
799 	   and that we are actually capturing */
800 
801 	IVTV_DEBUG_INFO("Stop Capture\n");
802 
803 	if (s->type == IVTV_DEC_STREAM_TYPE_VOUT)
804 		return 0;
805 	if (atomic_read(&itv->capturing) == 0)
806 		return 0;
807 
808 	switch (s->type) {
809 	case IVTV_ENC_STREAM_TYPE_YUV:
810 		cap_type = 1;
811 		break;
812 	case IVTV_ENC_STREAM_TYPE_PCM:
813 		cap_type = 1;
814 		break;
815 	case IVTV_ENC_STREAM_TYPE_VBI:
816 		cap_type = 1;
817 		break;
818 	case IVTV_ENC_STREAM_TYPE_MPG:
819 	default:
820 		cap_type = 0;
821 		break;
822 	}
823 
824 	/* Stop Capture Mode */
825 	if (s->type == IVTV_ENC_STREAM_TYPE_MPG && gop_end) {
826 		stopmode = 0;
827 	} else {
828 		stopmode = 1;
829 	}
830 
831 	/* end_capture */
832 	/* when: 0 =  end of GOP  1 = NOW!, type: 0 = mpeg, subtype: 3 = video+audio */
833 	ivtv_vapi(itv, CX2341X_ENC_STOP_CAPTURE, 3, stopmode, cap_type, s->subtype);
834 
835 	if (!test_bit(IVTV_F_S_PASSTHROUGH, &s->s_flags)) {
836 		if (s->type == IVTV_ENC_STREAM_TYPE_MPG && gop_end) {
837 			/* only run these if we're shutting down the last cap */
838 			unsigned long duration;
839 			unsigned long then = jiffies;
840 
841 			add_wait_queue(&itv->eos_waitq, &wait);
842 
843 			set_current_state(TASK_INTERRUPTIBLE);
844 
845 			/* wait 2s for EOS interrupt */
846 			while (!test_bit(IVTV_F_I_EOS, &itv->i_flags) &&
847 				time_before(jiffies,
848 					    then + msecs_to_jiffies(2000))) {
849 				schedule_timeout(msecs_to_jiffies(10));
850 			}
851 
852 			/* To convert jiffies to ms, we must multiply by 1000
853 			 * and divide by HZ.  To avoid runtime division, we
854 			 * convert this to multiplication by 1000/HZ.
855 			 * Since integer division truncates, we get the best
856 			 * accuracy if we do a rounding calculation of the constant.
857 			 * Think of the case where HZ is 1024.
858 			 */
859 			duration = ((1000 + HZ / 2) / HZ) * (jiffies - then);
860 
861 			if (!test_bit(IVTV_F_I_EOS, &itv->i_flags)) {
862 				IVTV_DEBUG_WARN("%s: EOS interrupt not received! stopping anyway.\n", s->name);
863 				IVTV_DEBUG_WARN("%s: waited %lu ms.\n", s->name, duration);
864 			} else {
865 				IVTV_DEBUG_INFO("%s: EOS took %lu ms to occur.\n", s->name, duration);
866 			}
867 			set_current_state(TASK_RUNNING);
868 			remove_wait_queue(&itv->eos_waitq, &wait);
869 			set_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
870 		}
871 
872 		/* Handle any pending interrupts */
873 		ivtv_msleep_timeout(100, 0);
874 	}
875 
876 	atomic_dec(&itv->capturing);
877 
878 	/* Clear capture and no-read bits */
879 	clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
880 
881 	if (s->type == IVTV_ENC_STREAM_TYPE_VBI)
882 		ivtv_set_irq_mask(itv, IVTV_IRQ_ENC_VBI_CAP);
883 
884 	if (atomic_read(&itv->capturing) > 0) {
885 		return 0;
886 	}
887 
888 	cx2341x_handler_set_busy(&itv->cxhdl, 0);
889 
890 	/* Set the following Interrupt mask bits for capture */
891 	ivtv_set_irq_mask(itv, IVTV_IRQ_MASK_CAPTURE);
892 	del_timer(&itv->dma_timer);
893 
894 	/* event notification (off) */
895 	if (test_and_clear_bit(IVTV_F_I_DIG_RST, &itv->i_flags)) {
896 		/* type: 0 = refresh */
897 		/* on/off: 0 = off, intr: 0x10000000, mbox_id: -1: none */
898 		ivtv_vapi(itv, CX2341X_ENC_SET_EVENT_NOTIFICATION, 4, 0, 0, IVTV_IRQ_ENC_VIM_RST, -1);
899 		ivtv_set_irq_mask(itv, IVTV_IRQ_ENC_VIM_RST);
900 	}
901 
902 	/* Raw-passthrough is implied on start. Make sure it's stopped so
903 	   the encoder will re-initialize when next started */
904 	ivtv_vapi(itv, CX2341X_ENC_STOP_CAPTURE, 3, 1, 2, 7);
905 
906 	wake_up(&s->waitq);
907 
908 	return 0;
909 }
910 EXPORT_SYMBOL(ivtv_stop_v4l2_encode_stream);
911 
912 int ivtv_stop_v4l2_decode_stream(struct ivtv_stream *s, int flags, u64 pts)
913 {
914 	static const struct v4l2_event ev = {
915 		.type = V4L2_EVENT_EOS,
916 	};
917 	struct ivtv *itv = s->itv;
918 
919 	if (s->vdev.v4l2_dev == NULL)
920 		return -EINVAL;
921 
922 	if (s->type != IVTV_DEC_STREAM_TYPE_YUV && s->type != IVTV_DEC_STREAM_TYPE_MPG)
923 		return -EINVAL;
924 
925 	if (!test_bit(IVTV_F_S_STREAMING, &s->s_flags))
926 		return 0;
927 
928 	IVTV_DEBUG_INFO("Stop Decode at %llu, flags: %x\n", (unsigned long long)pts, flags);
929 
930 	/* Stop Decoder */
931 	if (!(flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) || pts) {
932 		u32 tmp = 0;
933 
934 		/* Wait until the decoder is no longer running */
935 		if (pts) {
936 			ivtv_vapi(itv, CX2341X_DEC_STOP_PLAYBACK, 3,
937 				0, (u32)(pts & 0xffffffff), (u32)(pts >> 32));
938 		}
939 		while (1) {
940 			u32 data[CX2341X_MBOX_MAX_DATA];
941 			ivtv_vapi_result(itv, data, CX2341X_DEC_GET_XFER_INFO, 0);
942 			if (s->q_full.buffers + s->q_dma.buffers == 0) {
943 				if (tmp == data[3])
944 					break;
945 				tmp = data[3];
946 			}
947 			if (ivtv_msleep_timeout(100, 1))
948 				break;
949 		}
950 	}
951 	ivtv_vapi(itv, CX2341X_DEC_STOP_PLAYBACK, 3, flags & V4L2_DEC_CMD_STOP_TO_BLACK, 0, 0);
952 
953 	/* turn off notification of dual/stereo mode change */
954 	ivtv_vapi(itv, CX2341X_DEC_SET_EVENT_NOTIFICATION, 4, 0, 0, IVTV_IRQ_DEC_AUD_MODE_CHG, -1);
955 
956 	ivtv_set_irq_mask(itv, IVTV_IRQ_MASK_DECODE);
957 	del_timer(&itv->dma_timer);
958 
959 	clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
960 	clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
961 	ivtv_flush_queues(s);
962 
963 	/* decoder needs time to settle */
964 	ivtv_msleep_timeout(40, 0);
965 
966 	/* decrement decoding */
967 	atomic_dec(&itv->decoding);
968 
969 	set_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags);
970 	wake_up(&itv->event_waitq);
971 	v4l2_event_queue(&s->vdev, &ev);
972 
973 	/* wake up wait queues */
974 	wake_up(&s->waitq);
975 
976 	return 0;
977 }
978 
979 int ivtv_passthrough_mode(struct ivtv *itv, int enable)
980 {
981 	struct ivtv_stream *yuv_stream = &itv->streams[IVTV_ENC_STREAM_TYPE_YUV];
982 	struct ivtv_stream *dec_stream = &itv->streams[IVTV_DEC_STREAM_TYPE_YUV];
983 
984 	if (yuv_stream->vdev.v4l2_dev == NULL || dec_stream->vdev.v4l2_dev == NULL)
985 		return -EINVAL;
986 
987 	IVTV_DEBUG_INFO("ivtv ioctl: Select passthrough mode\n");
988 
989 	/* Prevent others from starting/stopping streams while we
990 	   initiate/terminate passthrough mode */
991 	if (enable) {
992 		if (itv->output_mode == OUT_PASSTHROUGH) {
993 			return 0;
994 		}
995 		if (ivtv_set_output_mode(itv, OUT_PASSTHROUGH) != OUT_PASSTHROUGH)
996 			return -EBUSY;
997 
998 		/* Fully initialize stream, and then unflag init */
999 		set_bit(IVTV_F_S_PASSTHROUGH, &dec_stream->s_flags);
1000 		set_bit(IVTV_F_S_STREAMING, &dec_stream->s_flags);
1001 
1002 		/* Setup YUV Decoder */
1003 		ivtv_setup_v4l2_decode_stream(dec_stream);
1004 
1005 		/* Start Decoder */
1006 		ivtv_vapi(itv, CX2341X_DEC_START_PLAYBACK, 2, 0, 1);
1007 		atomic_inc(&itv->decoding);
1008 
1009 		/* Setup capture if not already done */
1010 		if (atomic_read(&itv->capturing) == 0) {
1011 			cx2341x_handler_setup(&itv->cxhdl);
1012 			cx2341x_handler_set_busy(&itv->cxhdl, 1);
1013 		}
1014 
1015 		/* Start Passthrough Mode */
1016 		ivtv_vapi(itv, CX2341X_ENC_START_CAPTURE, 2, 2, 11);
1017 		atomic_inc(&itv->capturing);
1018 		return 0;
1019 	}
1020 
1021 	if (itv->output_mode != OUT_PASSTHROUGH)
1022 		return 0;
1023 
1024 	/* Stop Passthrough Mode */
1025 	ivtv_vapi(itv, CX2341X_ENC_STOP_CAPTURE, 3, 1, 2, 11);
1026 	ivtv_vapi(itv, CX2341X_DEC_STOP_PLAYBACK, 3, 1, 0, 0);
1027 
1028 	atomic_dec(&itv->capturing);
1029 	atomic_dec(&itv->decoding);
1030 	clear_bit(IVTV_F_S_PASSTHROUGH, &dec_stream->s_flags);
1031 	clear_bit(IVTV_F_S_STREAMING, &dec_stream->s_flags);
1032 	itv->output_mode = OUT_NONE;
1033 	if (atomic_read(&itv->capturing) == 0)
1034 		cx2341x_handler_set_busy(&itv->cxhdl, 0);
1035 
1036 	return 0;
1037 }
1038