[mirror_ubuntu-hirsute-kernel.git] / drivers / media / pci / ivtv / ivtv-alsa-pcm.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  ALSA PCM device for the
 *  ALSA interface to ivtv PCM capture streams
 *
 *  Copyright (C) 2009,2012  Andy Walls <awalls@md.metrocast.net>
 *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
 *
 *  Portions of this work were sponsored by ONELAN Limited for the cx18 driver
 */

#include "ivtv-driver.h"
#include "ivtv-queue.h"
#include "ivtv-streams.h"
#include "ivtv-fileops.h"
#include "ivtv-alsa.h"
#include "ivtv-alsa-pcm.h"

#include <linux/vmalloc.h>

#include <sound/core.h>
#include <sound/pcm.h>


static unsigned int pcm_debug;
module_param(pcm_debug, int, 0644);
MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm");

#define dprintk(fmt, arg...) \
	do { \
		if (pcm_debug) \
			pr_info("ivtv-alsa-pcm %s: " fmt, __func__, ##arg); \
	} while (0)

static const struct snd_pcm_hardware snd_ivtv_hw_capture = {
	.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_MMAP           |
		SNDRV_PCM_INFO_INTERLEAVED    |
		SNDRV_PCM_INFO_MMAP_VALID,

	.formats = SNDRV_PCM_FMTBIT_S16_LE,

	.rates = SNDRV_PCM_RATE_48000,

	.rate_min = 48000,
	.rate_max = 48000,
	.channels_min = 2,
	.channels_max = 2,
	.buffer_bytes_max = 62720 * 8,	/* just about the value in usbaudio.c */
	.period_bytes_min = 64,		/* 12544/2, */
	.period_bytes_max = 12544,
	.periods_min = 2,
	.periods_max = 98,		/* 12544, */
};

static void ivtv_alsa_announce_pcm_data(struct snd_ivtv_card *itvsc,
					u8 *pcm_data,
					size_t num_bytes)
{
	struct snd_pcm_substream *substream;
	struct snd_pcm_runtime *runtime;
	unsigned int oldptr;
	unsigned int stride;
	int period_elapsed = 0;
	int length;

	dprintk("ivtv alsa announce ptr=%p data=%p num_bytes=%zu\n", itvsc,
		pcm_data, num_bytes);

	substream = itvsc->capture_pcm_substream;
	if (substream == NULL) {
		dprintk("substream was NULL\n");
		return;
	}

	runtime = substream->runtime;
	if (runtime == NULL) {
		dprintk("runtime was NULL\n");
		return;
	}

	stride = runtime->frame_bits >> 3;
	if (stride == 0) {
		dprintk("stride is zero\n");
		return;
	}

	length = num_bytes / stride;
	if (length == 0) {
		dprintk("%s: length was zero\n", __func__);
		return;
	}

	if (runtime->dma_area == NULL) {
		dprintk("dma area was NULL - ignoring\n");
		return;
	}

	oldptr = itvsc->hwptr_done_capture;
	if (oldptr + length >= runtime->buffer_size) {
		unsigned int cnt =
			runtime->buffer_size - oldptr;
		memcpy(runtime->dma_area + oldptr * stride, pcm_data,
		       cnt * stride);
		memcpy(runtime->dma_area, pcm_data + cnt * stride,
		       length * stride - cnt * stride);
	} else {
		memcpy(runtime->dma_area + oldptr * stride, pcm_data,
		       length * stride);
	}
	snd_pcm_stream_lock(substream);

	itvsc->hwptr_done_capture += length;
	if (itvsc->hwptr_done_capture >=
	    runtime->buffer_size)
		itvsc->hwptr_done_capture -=
			runtime->buffer_size;

	itvsc->capture_transfer_done += length;
	if (itvsc->capture_transfer_done >=
	    runtime->period_size) {
		itvsc->capture_transfer_done -=
			runtime->period_size;
		period_elapsed = 1;
	}

	snd_pcm_stream_unlock(substream);

	if (period_elapsed)
		snd_pcm_period_elapsed(substream);
}

static int snd_ivtv_pcm_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
	struct ivtv *itv = to_ivtv(v4l2_dev);
	struct ivtv_stream *s;
	struct ivtv_open_id item;
	int ret;

	/* Instruct the CX2341[56] to start sending packets */
	snd_ivtv_lock(itvsc);

	if (ivtv_init_on_first_open(itv)) {
		snd_ivtv_unlock(itvsc);
		return -ENXIO;
	}

	s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];

	v4l2_fh_init(&item.fh, &s->vdev);
	item.itv = itv;
	item.type = s->type;

	/* See if the stream is available */
	if (ivtv_claim_stream(&item, item.type)) {
		/* No, it's already in use */
		v4l2_fh_exit(&item.fh);
		snd_ivtv_unlock(itvsc);
		return -EBUSY;
	}

	if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) ||
	    test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
		/* We're already streaming.  No additional action required */
		snd_ivtv_unlock(itvsc);
		return 0;
	}


	runtime->hw = snd_ivtv_hw_capture;
	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	itvsc->capture_pcm_substream = substream;
	runtime->private_data = itv;

	itv->pcm_announce_callback = ivtv_alsa_announce_pcm_data;

	/* Not currently streaming, so start it up */
	set_bit(IVTV_F_S_STREAMING, &s->s_flags);
	ret = ivtv_start_v4l2_encode_stream(s);
	snd_ivtv_unlock(itvsc);

	return ret;
}

static int snd_ivtv_pcm_capture_close(struct snd_pcm_substream *substream)
{
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
	struct ivtv *itv = to_ivtv(v4l2_dev);
	struct ivtv_stream *s;

	/* Instruct the ivtv to stop sending packets */
	snd_ivtv_lock(itvsc);
	s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
	ivtv_stop_v4l2_encode_stream(s, 0);
	clear_bit(IVTV_F_S_STREAMING, &s->s_flags);

	ivtv_release_stream(s);

	itv->pcm_announce_callback = NULL;
	snd_ivtv_unlock(itvsc);

	return 0;
}

static int snd_ivtv_pcm_ioctl(struct snd_pcm_substream *substream,
		     unsigned int cmd, void *arg)
{
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	int ret;

	snd_ivtv_lock(itvsc);
	ret = snd_pcm_lib_ioctl(substream, cmd, arg);
	snd_ivtv_unlock(itvsc);
	return ret;
}


static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
					size_t size)
{
	struct snd_pcm_runtime *runtime = subs->runtime;

	dprintk("Allocating vbuffer\n");
	if (runtime->dma_area) {
		if (runtime->dma_bytes > size)
			return 0;

		vfree(runtime->dma_area);
	}
	runtime->dma_area = vmalloc(size);
	if (!runtime->dma_area)
		return -ENOMEM;

	runtime->dma_bytes = size;

	return 0;
}

static int snd_ivtv_pcm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *params)
{
	dprintk("%s called\n", __func__);

	return snd_pcm_alloc_vmalloc_buffer(substream,
					   params_buffer_bytes(params));
}

static int snd_ivtv_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	unsigned long flags;
	unsigned char *dma_area = NULL;

	spin_lock_irqsave(&itvsc->slock, flags);
	if (substream->runtime->dma_area) {
		dprintk("freeing pcm capture region\n");
		dma_area = substream->runtime->dma_area;
		substream->runtime->dma_area = NULL;
	}
	spin_unlock_irqrestore(&itvsc->slock, flags);
	vfree(dma_area);

	return 0;
}

static int snd_ivtv_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);

	itvsc->hwptr_done_capture = 0;
	itvsc->capture_transfer_done = 0;

	return 0;
}

static int snd_ivtv_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	return 0;
}

static
snd_pcm_uframes_t snd_ivtv_pcm_pointer(struct snd_pcm_substream *substream)
{
	unsigned long flags;
	snd_pcm_uframes_t hwptr_done;
	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);

	spin_lock_irqsave(&itvsc->slock, flags);
	hwptr_done = itvsc->hwptr_done_capture;
	spin_unlock_irqrestore(&itvsc->slock, flags);

	return hwptr_done;
}

static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
					     unsigned long offset)
{
	void *pageptr = subs->runtime->dma_area + offset;

	return vmalloc_to_page(pageptr);
}

static const struct snd_pcm_ops snd_ivtv_pcm_capture_ops = {
	.open		= snd_ivtv_pcm_capture_open,
	.close		= snd_ivtv_pcm_capture_close,
	.ioctl		= snd_ivtv_pcm_ioctl,
	.hw_params	= snd_ivtv_pcm_hw_params,
	.hw_free	= snd_ivtv_pcm_hw_free,
	.prepare	= snd_ivtv_pcm_prepare,
	.trigger	= snd_ivtv_pcm_trigger,
	.pointer	= snd_ivtv_pcm_pointer,
	.page		= snd_pcm_get_vmalloc_page,
};

int snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc)
{
	struct snd_pcm *sp;
	struct snd_card *sc = itvsc->sc;
	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
	struct ivtv *itv = to_ivtv(v4l2_dev);
	int ret;

	ret = snd_pcm_new(sc, "CX2341[56] PCM",
			  0, /* PCM device 0, the only one for this card */
			  0, /* 0 playback substreams */
			  1, /* 1 capture substream */
			  &sp);
	if (ret) {
		IVTV_ALSA_ERR("%s: snd_ivtv_pcm_create() failed with err %d\n",
			      __func__, ret);
		goto err_exit;
	}

	spin_lock_init(&itvsc->slock);

	snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE,
			&snd_ivtv_pcm_capture_ops);
	sp->info_flags = 0;
	sp->private_data = itvsc;
	strscpy(sp->name, itv->card_name, sizeof(sp->name));

	return 0;

err_exit:
	return ret;
}
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
269c11fb AW	2	/*
	3	* ALSA PCM device for the
	4	* ALSA interface to ivtv PCM capture streams
	5	*
	6	* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
	7	* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
	8	*
	9	* Portions of this work were sponsored by ONELAN Limited for the cx18 driver
269c11fb AW	10	*/
269c11fb AW	11
269c11fb AW	12	#include "ivtv-driver.h"
	13	#include "ivtv-queue.h"
	14	#include "ivtv-streams.h"
	15	#include "ivtv-fileops.h"
	16	#include "ivtv-alsa.h"
2aebbf67	17	#include "ivtv-alsa-pcm.h"
269c11fb	18
bbdba43f MCC	19	#include <linux/vmalloc.h>
	20
	21	#include <sound/core.h>
	22	#include <sound/pcm.h>
	23
	24
269c11fb AW	25	static unsigned int pcm_debug;
	26	module_param(pcm_debug, int, 0644);
	27	MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm");
	28
	29	#define dprintk(fmt, arg...) \
	30	do { \
	31	if (pcm_debug) \
	32	pr_info("ivtv-alsa-pcm %s: " fmt, __func__, ##arg); \
	33	} while (0)
	34
47f14314	35	static const struct snd_pcm_hardware snd_ivtv_hw_capture = {
269c11fb AW	36	.info = SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	37	SNDRV_PCM_INFO_MMAP \|
	38	SNDRV_PCM_INFO_INTERLEAVED \|
	39	SNDRV_PCM_INFO_MMAP_VALID,
	40
	41	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	42
	43	.rates = SNDRV_PCM_RATE_48000,
	44
	45	.rate_min = 48000,
	46	.rate_max = 48000,
	47	.channels_min = 2,
	48	.channels_max = 2,
	49	.buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
	50	.period_bytes_min = 64, /* 12544/2, */
	51	.period_bytes_max = 12544,
	52	.periods_min = 2,
	53	.periods_max = 98, /* 12544, */
	54	};
	55
2aebbf67 MCC	56	static void ivtv_alsa_announce_pcm_data(struct snd_ivtv_card *itvsc,
	57	u8 *pcm_data,
	58	size_t num_bytes)
269c11fb AW	59	{
	60	struct snd_pcm_substream *substream;
	61	struct snd_pcm_runtime *runtime;
	62	unsigned int oldptr;
	63	unsigned int stride;
	64	int period_elapsed = 0;
	65	int length;
	66
339f06c5	67	dprintk("ivtv alsa announce ptr=%p data=%p num_bytes=%zu\n", itvsc,
269c11fb AW	68	pcm_data, num_bytes);
	69
	70	substream = itvsc->capture_pcm_substream;
	71	if (substream == NULL) {
	72	dprintk("substream was NULL\n");
	73	return;
	74	}
	75
	76	runtime = substream->runtime;
	77	if (runtime == NULL) {
	78	dprintk("runtime was NULL\n");
	79	return;
	80	}
	81
	82	stride = runtime->frame_bits >> 3;
	83	if (stride == 0) {
	84	dprintk("stride is zero\n");
	85	return;
	86	}
	87
	88	length = num_bytes / stride;
	89	if (length == 0) {
	90	dprintk("%s: length was zero\n", __func__);
	91	return;
	92	}
	93
	94	if (runtime->dma_area == NULL) {
	95	dprintk("dma area was NULL - ignoring\n");
	96	return;
	97	}
	98
	99	oldptr = itvsc->hwptr_done_capture;
	100	if (oldptr + length >= runtime->buffer_size) {
	101	unsigned int cnt =
	102	runtime->buffer_size - oldptr;
	103	memcpy(runtime->dma_area + oldptr * stride, pcm_data,
	104	cnt * stride);
	105	memcpy(runtime->dma_area, pcm_data + cnt * stride,
	106	length * stride - cnt * stride);
	107	} else {
	108	memcpy(runtime->dma_area + oldptr * stride, pcm_data,
	109	length * stride);
	110	}
	111	snd_pcm_stream_lock(substream);
	112
	113	itvsc->hwptr_done_capture += length;
	114	if (itvsc->hwptr_done_capture >=
	115	runtime->buffer_size)
	116	itvsc->hwptr_done_capture -=
	117	runtime->buffer_size;
	118
	119	itvsc->capture_transfer_done += length;
	120	if (itvsc->capture_transfer_done >=
	121	runtime->period_size) {
	122	itvsc->capture_transfer_done -=
	123	runtime->period_size;
	124	period_elapsed = 1;
	125	}
	126
	127	snd_pcm_stream_unlock(substream);
	128
	129	if (period_elapsed)
	130	snd_pcm_period_elapsed(substream);
	131	}
132
133	static int snd_ivtv_pcm_capture_open(struct snd_pcm_substream *substream)
134	{
135	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
136	struct snd_pcm_runtime *runtime = substream->runtime;
137	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
138	struct ivtv *itv = to_ivtv(v4l2_dev);
139	struct ivtv_stream *s;
140	struct ivtv_open_id item;
141	int ret;
142
143	/* Instruct the CX2341[56] to start sending packets */
144	snd_ivtv_lock(itvsc);
deb29e90 TI	145
	146	if (ivtv_init_on_first_open(itv)) {
	147	snd_ivtv_unlock(itvsc);
	148	return -ENXIO;
	149	}
	150
269c11fb AW	151	s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
269c11fb AW	152
635d62f0	153	v4l2_fh_init(&item.fh, &s->vdev);
269c11fb AW	154	item.itv = itv;
	155	item.type = s->type;
	156
	157	/* See if the stream is available */
	158	if (ivtv_claim_stream(&item, item.type)) {
	159	/* No, it's already in use */
c5b81fe3	160	v4l2_fh_exit(&item.fh);
269c11fb AW	161	snd_ivtv_unlock(itvsc);
	162	return -EBUSY;
	163	}
	164
	165	if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) \|\|
	166	test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
	167	/* We're already streaming. No additional action required */
	168	snd_ivtv_unlock(itvsc);
	169	return 0;
	170	}
	171
	172
	173	runtime->hw = snd_ivtv_hw_capture;
	174	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	175	itvsc->capture_pcm_substream = substream;
	176	runtime->private_data = itv;
	177
	178	itv->pcm_announce_callback = ivtv_alsa_announce_pcm_data;
	179
	180	/* Not currently streaming, so start it up */
	181	set_bit(IVTV_F_S_STREAMING, &s->s_flags);
	182	ret = ivtv_start_v4l2_encode_stream(s);
	183	snd_ivtv_unlock(itvsc);
	184
	185	return ret;
	186	}
	187
	188	static int snd_ivtv_pcm_capture_close(struct snd_pcm_substream *substream)
	189	{
	190	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	191	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
	192	struct ivtv *itv = to_ivtv(v4l2_dev);
	193	struct ivtv_stream *s;
	194
	195	/* Instruct the ivtv to stop sending packets */
	196	snd_ivtv_lock(itvsc);
	197	s = &itv->streams[IVTV_ENC_STREAM_TYPE_PCM];
	198	ivtv_stop_v4l2_encode_stream(s, 0);
	199	clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
	200
	201	ivtv_release_stream(s);
	202
	203	itv->pcm_announce_callback = NULL;
	204	snd_ivtv_unlock(itvsc);
	205
	206	return 0;
	207	}
	208
	209	static int snd_ivtv_pcm_ioctl(struct snd_pcm_substream *substream,
	210	unsigned int cmd, void *arg)
	211	{
	212	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	213	int ret;
	214
	215	snd_ivtv_lock(itvsc);
	216	ret = snd_pcm_lib_ioctl(substream, cmd, arg);
	217	snd_ivtv_unlock(itvsc);
	218	return ret;
	219	}
	220
	221
	222	static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
	223	size_t size)
	224	{
225	struct snd_pcm_runtime *runtime = subs->runtime;
226
227	dprintk("Allocating vbuffer\n");
228	if (runtime->dma_area) {
229	if (runtime->dma_bytes > size)
230	return 0;
231
232	vfree(runtime->dma_area);
233	}
234	runtime->dma_area = vmalloc(size);
235	if (!runtime->dma_area)
236	return -ENOMEM;
237
238	runtime->dma_bytes = size;
239
240	return 0;
241	}
242
243	static int snd_ivtv_pcm_hw_params(struct snd_pcm_substream *substream,
244	struct snd_pcm_hw_params *params)
245	{
246	dprintk("%s called\n", __func__);
247
248	return snd_pcm_alloc_vmalloc_buffer(substream,
249	params_buffer_bytes(params));
250	}
251
252	static int snd_ivtv_pcm_hw_free(struct snd_pcm_substream *substream)
253	{
254	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
255	unsigned long flags;
d989dc20	256	unsigned char *dma_area = NULL;
269c11fb AW	257
	258	spin_lock_irqsave(&itvsc->slock, flags);
	259	if (substream->runtime->dma_area) {
	260	dprintk("freeing pcm capture region\n");
d989dc20	261	dma_area = substream->runtime->dma_area;
269c11fb AW	262	substream->runtime->dma_area = NULL;
	263	}
	264	spin_unlock_irqrestore(&itvsc->slock, flags);
d989dc20	265	vfree(dma_area);
269c11fb AW	266
	267	return 0;
	268	}
	269
	270	static int snd_ivtv_pcm_prepare(struct snd_pcm_substream *substream)
	271	{
	272	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	273
	274	itvsc->hwptr_done_capture = 0;
	275	itvsc->capture_transfer_done = 0;
	276
	277	return 0;
	278	}
	279
	280	static int snd_ivtv_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	281	{
	282	return 0;
	283	}
	284
	285	static
	286	snd_pcm_uframes_t snd_ivtv_pcm_pointer(struct snd_pcm_substream *substream)
	287	{
	288	unsigned long flags;
	289	snd_pcm_uframes_t hwptr_done;
	290	struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream);
	291
	292	spin_lock_irqsave(&itvsc->slock, flags);
	293	hwptr_done = itvsc->hwptr_done_capture;
	294	spin_unlock_irqrestore(&itvsc->slock, flags);
	295
	296	return hwptr_done;
	297	}
	298
	299	static struct page snd_pcm_get_vmalloc_page(struct snd_pcm_substream subs,
	300	unsigned long offset)
	301	{
	302	void *pageptr = subs->runtime->dma_area + offset;
	303
	304	return vmalloc_to_page(pageptr);
	305	}
	306
5c8d8c01	307	static const struct snd_pcm_ops snd_ivtv_pcm_capture_ops = {
269c11fb AW	308	.open = snd_ivtv_pcm_capture_open,
	309	.close = snd_ivtv_pcm_capture_close,
	310	.ioctl = snd_ivtv_pcm_ioctl,
	311	.hw_params = snd_ivtv_pcm_hw_params,
	312	.hw_free = snd_ivtv_pcm_hw_free,
	313	.prepare = snd_ivtv_pcm_prepare,
	314	.trigger = snd_ivtv_pcm_trigger,
	315	.pointer = snd_ivtv_pcm_pointer,
	316	.page = snd_pcm_get_vmalloc_page,
	317	};
	318
	319	int snd_ivtv_pcm_create(struct snd_ivtv_card *itvsc)
	320	{
	321	struct snd_pcm *sp;
	322	struct snd_card *sc = itvsc->sc;
	323	struct v4l2_device *v4l2_dev = itvsc->v4l2_dev;
	324	struct ivtv *itv = to_ivtv(v4l2_dev);
	325	int ret;
	326
	327	ret = snd_pcm_new(sc, "CX2341[56] PCM",
	328	0, /* PCM device 0, the only one for this card */
	329	0, /* 0 playback substreams */
	330	1, /* 1 capture substream */
	331	&sp);
	332	if (ret) {
	333	IVTV_ALSA_ERR("%s: snd_ivtv_pcm_create() failed with err %d\n",
	334	__func__, ret);
	335	goto err_exit;
	336	}
	337
	338	spin_lock_init(&itvsc->slock);
	339
	340	snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE,
	341	&snd_ivtv_pcm_capture_ops);
	342	sp->info_flags = 0;
	343	sp->private_data = itvsc;
c0decac1	344	strscpy(sp->name, itv->card_name, sizeof(sp->name));
269c11fb AW	345
	346	return 0;
	347
	348	err_exit:
	349	return ret;
	350	}