[mirror_ubuntu-artful-kernel.git] / drivers / media / video / cx18 / cx18-alsa-pcm.c

/*
 *  ALSA PCM device for the
 *  ALSA interface to cx18 PCM capture streams
 *
 *  Copyright (C) 2009  Andy Walls <awalls@radix.net>
 *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
 *
 *  Portions of this work were sponsored by ONELAN Limited.
 *
 *  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 <linux/init.h>
#include <linux/kernel.h>

#include <media/v4l2-device.h>

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

#include "cx18-driver.h"
#include "cx18-queue.h"
#include "cx18-streams.h"
#include "cx18-fileops.h"
#include "cx18-alsa.h"

extern int cx18_alsa_debug;

#define dprintk(fmt, arg...) do {					\
	    if (cx18_alsa_debug)					\
		printk(KERN_INFO "cx18-alsa %s: " fmt,			\
				  __func__, ##arg); 			\
	} while (0)

/* Forward Declaration */
void cx18_alsa_announce_pcm_data(struct snd_cx18_card *cxsc, u8 *pcm_data,
				 size_t num_bytes);

static struct snd_pcm_hardware snd_cx18_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_CONTINUOUS | SNDRV_PCM_RATE_KNOT,

	.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 int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
	struct cx18 *cx = to_cx18(v4l2_dev);
	struct cx18_stream *s;
	struct cx18_open_id *item;
	int ret;

	/* Instruct the cx18 to start sending packets */
	s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];

	/* Allocate memory */
	item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
	if (NULL == item) {
		return -ENOMEM;
	}
	item->cx = cx;
	item->type = s->type;
	item->open_id = cx->open_id++;

	/* See if the stream is available */
	if (cx18_claim_stream(item, item->type)) {
		/* No, it's already in use */
		kfree(item);
		return -EBUSY;
	}

	if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) ||
	    test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) {
		/* We're already streaming.  No additional action required */
		return 0;
	}


	runtime->hw = snd_cx18_hw_capture;
	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	cxsc->capture_pcm_substream = substream;
	runtime->private_data = cx;

	cx->pcm_announce_callback = cx18_alsa_announce_pcm_data;

	/* Not currently streaming, so start it up */
	set_bit(CX18_F_S_STREAMING, &s->s_flags);
	ret = cx18_start_v4l2_encode_stream(s);

	return 0;
}

static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream)
{
	unsigned long flags;
	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
	struct cx18 *cx = to_cx18(v4l2_dev);
	struct cx18_stream *s;
	int ret;

	/* Instruct the cx18 to stop sending packets */
	s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
	ret = cx18_stop_v4l2_encode_stream(s, 0);
	clear_bit(CX18_F_S_STREAMING, &s->s_flags);

	cx18_release_stream(s);

	cx->pcm_announce_callback = NULL;

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

	return 0;
}

static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream,
		     unsigned int cmd, void *arg)
{
	return snd_pcm_lib_ioctl(substream, cmd, arg);
}


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_cx18_pcm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *params)
{
	int ret;

	dprintk("%s called\n", __func__);

	ret = snd_pcm_alloc_vmalloc_buffer(substream,
					   params_buffer_bytes(params));
	return 0;
}

static int snd_cx18_pcm_hw_free(struct snd_pcm_substream *substream)
{
	return 0;
}

static int snd_cx18_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);

	cxsc->hwptr_done_capture = 0;
	cxsc->capture_transfer_done = 0;

	return 0;
}

static int snd_cx18_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	return 0;
}

static
snd_pcm_uframes_t snd_cx18_pcm_pointer(struct snd_pcm_substream *substream)
{
	unsigned long flags;
	snd_pcm_uframes_t hwptr_done;
	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);

	spin_lock_irqsave(&cxsc->slock, flags);
	hwptr_done = cxsc->hwptr_done_capture;
	spin_unlock_irqrestore(&cxsc->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 struct snd_pcm_ops snd_cx18_pcm_capture_ops = {
	.open		= snd_cx18_pcm_capture_open,
	.close		= snd_cx18_pcm_capture_close,
	.ioctl		= snd_cx18_pcm_ioctl,
	.hw_params	= snd_cx18_pcm_hw_params,
	.hw_free	= snd_cx18_pcm_hw_free,
	.prepare	= snd_cx18_pcm_prepare,
	.trigger	= snd_cx18_pcm_trigger,
	.pointer	= snd_cx18_pcm_pointer,
	.page		= snd_pcm_get_vmalloc_page,
};

void cx18_alsa_announce_pcm_data(struct snd_cx18_card *cxsc, 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("cx18 alsa announce ptr=%p data=%p num_bytes=%d\n", cxsc,
		pcm_data, num_bytes);

	substream = cxsc->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 = cxsc->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);

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

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

	snd_pcm_stream_unlock(substream);

	if (period_elapsed)
		snd_pcm_period_elapsed(substream);
}

int snd_cx18_pcm_create(struct snd_cx18_card *cxsc)
{
	struct snd_pcm *sp;
	struct snd_card *sc = cxsc->sc;
	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
	struct cx18 *cx = to_cx18(v4l2_dev);
	int ret;

	ret = snd_pcm_new(sc, "CX23418 PCM",
			  0, /* PCM device 0, the only one for this card */
			  0, /* 0 playback substreams */
			  1, /* 1 capture substream */
			  &sp);
	if (ret) {
		CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n",
			      __func__, ret);
		goto err_exit;
	}

	spin_lock_init(&cxsc->slock);

	snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE, &snd_cx18_pcm_capture_ops);
	sp->info_flags = 0;
	sp->private_data = cxsc;
	strlcpy(sp->name, cx->card_name, sizeof(sp->name));

	return 0;

err_exit:
	return ret;
}
Commit	Line	Data
f9b071c7 AW	1	/*
	2	* ALSA PCM device for the
	3	* ALSA interface to cx18 PCM capture streams
	4	*
	5	* Copyright (C) 2009 Andy Walls <awalls@radix.net>
9972de90 DH	6	* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
	7	*
	8	* Portions of this work were sponsored by ONELAN Limited.
f9b071c7 AW	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	23	* 02111-1307 USA
	24	*/
	25
	26	#include <linux/init.h>
	27	#include <linux/kernel.h>
	28
	29	#include <media/v4l2-device.h>
	30
	31	#include <sound/core.h>
	32	#include <sound/pcm.h>
	33
	34	#include "cx18-driver.h"
9972de90 DH	35	#include "cx18-queue.h"
	36	#include "cx18-streams.h"
	37	#include "cx18-fileops.h"
f9b071c7 AW	38	#include "cx18-alsa.h"
f9b071c7 AW	39
9972de90 DH	40	extern int cx18_alsa_debug;
	41
	42	#define dprintk(fmt, arg...) do { \
	43	if (cx18_alsa_debug) \
	44	printk(KERN_INFO "cx18-alsa %s: " fmt, \
	45	__func__, ##arg); \
	46	} while (0)
	47
	48	/* Forward Declaration */
	49	void cx18_alsa_announce_pcm_data(struct snd_cx18_card cxsc, u8 pcm_data,
	50	size_t num_bytes);
	51
	52	static struct snd_pcm_hardware snd_cx18_hw_capture = {
	53	.info = SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	54	SNDRV_PCM_INFO_MMAP \|
	55	SNDRV_PCM_INFO_INTERLEAVED \|
	56	SNDRV_PCM_INFO_MMAP_VALID,
	57
	58	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	59
	60	.rates = SNDRV_PCM_RATE_CONTINUOUS \| SNDRV_PCM_RATE_KNOT,
	61
	62	.rate_min = 48000,
	63	.rate_max = 48000,
	64	.channels_min = 2,
	65	.channels_max = 2,
	66	.buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
	67	.period_bytes_min = 64, /* 12544/2, */
	68	.period_bytes_max = 12544,
	69	.periods_min = 2,
	70	.periods_max = 98, /* 12544, */
	71	};
	72
f9b071c7 AW	73	static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream)
	74	{
	75	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	76	struct snd_pcm_runtime *runtime = substream->runtime;
	77	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
f9b071c7	78	struct cx18 *cx = to_cx18(v4l2_dev);
9972de90 DH	79	struct cx18_stream *s;
	80	struct cx18_open_id *item;
	81	int ret;
	82
	83	/* Instruct the cx18 to start sending packets */
	84	s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
	85
	86	/* Allocate memory */
	87	item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
	88	if (NULL == item) {
9972de90 DH	89	return -ENOMEM;
	90	}
	91	item->cx = cx;
	92	item->type = s->type;
	93	item->open_id = cx->open_id++;
	94
	95	/* See if the stream is available */
	96	if (cx18_claim_stream(item, item->type)) {
	97	/* No, it's already in use */
1a8e0e33	98	kfree(item);
9972de90 DH	99	return -EBUSY;
	100	}
	101
	102	if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) \|\|
	103	test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) {
	104	/* We're already streaming. No additional action required */
	105	return 0;
	106	}
	107
	108
	109	runtime->hw = snd_cx18_hw_capture;
	110	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	111	cxsc->capture_pcm_substream = substream;
	112	runtime->private_data = cx;
	113
	114	cx->pcm_announce_callback = cx18_alsa_announce_pcm_data;
	115
	116	/* Not currently streaming, so start it up */
	117	set_bit(CX18_F_S_STREAMING, &s->s_flags);
	118	ret = cx18_start_v4l2_encode_stream(s);
	119
f9b071c7 AW	120	return 0;
	121	}
	122
	123	static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream)
	124	{
9972de90 DH	125	unsigned long flags;
	126	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	127	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
	128	struct cx18 *cx = to_cx18(v4l2_dev);
	129	struct cx18_stream *s;
	130	int ret;
	131
	132	/* Instruct the cx18 to stop sending packets */
	133	s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
	134	ret = cx18_stop_v4l2_encode_stream(s, 0);
	135	clear_bit(CX18_F_S_STREAMING, &s->s_flags);
	136
	137	cx18_release_stream(s);
	138
	139	cx->pcm_announce_callback = NULL;
	140
	141	spin_lock_irqsave(&cxsc->slock, flags);
	142	if (substream->runtime->dma_area) {
	143	dprintk("freeing pcm capture region\n");
	144	vfree(substream->runtime->dma_area);
	145	substream->runtime->dma_area = NULL;
	146	}
	147	spin_unlock_irqrestore(&cxsc->slock, flags);
	148
f9b071c7 AW	149	return 0;
	150	}
	151
	152	static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream,
	153	unsigned int cmd, void *arg)
	154	{
	155	return snd_pcm_lib_ioctl(substream, cmd, arg);
	156	}
	157
9972de90 DH	158
	159	static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
	160	size_t size)
	161	{
	162	struct snd_pcm_runtime *runtime = subs->runtime;
	163
	164	dprintk("Allocating vbuffer\n");
	165	if (runtime->dma_area) {
	166	if (runtime->dma_bytes > size)
	167	return 0;
	168
	169	vfree(runtime->dma_area);
	170	}
	171	runtime->dma_area = vmalloc(size);
	172	if (!runtime->dma_area)
	173	return -ENOMEM;
	174
	175	runtime->dma_bytes = size;
	176
	177	return 0;
	178	}
	179
f9b071c7 AW	180	static int snd_cx18_pcm_hw_params(struct snd_pcm_substream *substream,
	181	struct snd_pcm_hw_params *params)
	182	{
9972de90 DH	183	int ret;
	184
	185	dprintk("%s called\n", __func__);
	186
	187	ret = snd_pcm_alloc_vmalloc_buffer(substream,
	188	params_buffer_bytes(params));
f9b071c7 AW	189	return 0;
	190	}
	191
	192	static int snd_cx18_pcm_hw_free(struct snd_pcm_substream *substream)
	193	{
	194	return 0;
	195	}
	196
	197	static int snd_cx18_pcm_prepare(struct snd_pcm_substream *substream)
	198	{
9972de90 DH	199	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	200
	201	cxsc->hwptr_done_capture = 0;
	202	cxsc->capture_transfer_done = 0;
	203
f9b071c7 AW	204	return 0;
	205	}
	206
	207	static int snd_cx18_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	208	{
	209	return 0;
	210	}
	211
	212	static
	213	snd_pcm_uframes_t snd_cx18_pcm_pointer(struct snd_pcm_substream *substream)
	214	{
9972de90 DH	215	unsigned long flags;
	216	snd_pcm_uframes_t hwptr_done;
	217	struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream);
	218
	219	spin_lock_irqsave(&cxsc->slock, flags);
	220	hwptr_done = cxsc->hwptr_done_capture;
	221	spin_unlock_irqrestore(&cxsc->slock, flags);
	222
	223	return hwptr_done;
	224	}
	225
	226
	227	static struct page snd_pcm_get_vmalloc_page(struct snd_pcm_substream subs,
	228	unsigned long offset)
	229	{
	230	void *pageptr = subs->runtime->dma_area + offset;
	231
	232	return vmalloc_to_page(pageptr);
f9b071c7 AW	233	}
	234
	235	static struct snd_pcm_ops snd_cx18_pcm_capture_ops = {
	236	.open = snd_cx18_pcm_capture_open,
	237	.close = snd_cx18_pcm_capture_close,
	238	.ioctl = snd_cx18_pcm_ioctl,
	239	.hw_params = snd_cx18_pcm_hw_params,
	240	.hw_free = snd_cx18_pcm_hw_free,
	241	.prepare = snd_cx18_pcm_prepare,
	242	.trigger = snd_cx18_pcm_trigger,
	243	.pointer = snd_cx18_pcm_pointer,
9972de90	244	.page = snd_pcm_get_vmalloc_page,
f9b071c7 AW	245	};
f9b071c7 AW	246
9972de90 DH	247	void cx18_alsa_announce_pcm_data(struct snd_cx18_card cxsc, u8 pcm_data,
	248	size_t num_bytes)
	249	{
	250	struct snd_pcm_substream *substream;
	251	struct snd_pcm_runtime *runtime;
	252	unsigned int oldptr;
	253	unsigned int stride;
	254	int period_elapsed = 0;
	255	int length;
	256
	257	dprintk("cx18 alsa announce ptr=%p data=%p num_bytes=%d\n", cxsc,
	258	pcm_data, num_bytes);
	259
	260	substream = cxsc->capture_pcm_substream;
	261	if (substream == NULL) {
	262	dprintk("substream was NULL\n");
	263	return;
	264	}
	265
	266	runtime = substream->runtime;
	267	if (runtime == NULL) {
	268	dprintk("runtime was NULL\n");
	269	return;
	270	}
	271
	272	stride = runtime->frame_bits >> 3;
	273	if (stride == 0) {
	274	dprintk("stride is zero\n");
	275	return;
	276	}
	277
	278	length = num_bytes / stride;
	279	if (length == 0) {
	280	dprintk("%s: length was zero\n", __func__);
	281	return;
	282	}
	283
	284	if (runtime->dma_area == NULL) {
	285	dprintk("dma area was NULL - ignoring\n");
	286	return;
	287	}
	288
	289	oldptr = cxsc->hwptr_done_capture;
	290	if (oldptr + length >= runtime->buffer_size) {
	291	unsigned int cnt =
	292	runtime->buffer_size - oldptr;
	293	memcpy(runtime->dma_area + oldptr * stride, pcm_data,
	294	cnt * stride);
	295	memcpy(runtime->dma_area, pcm_data + cnt * stride,
	296	length * stride - cnt * stride);
	297	} else {
	298	memcpy(runtime->dma_area + oldptr * stride, pcm_data,
	299	length * stride);
	300	}
	301	snd_pcm_stream_lock(substream);
	302
	303	cxsc->hwptr_done_capture += length;
	304	if (cxsc->hwptr_done_capture >=
	305	runtime->buffer_size)
	306	cxsc->hwptr_done_capture -=
	307	runtime->buffer_size;
	308
	309	cxsc->capture_transfer_done += length;
	310	if (cxsc->capture_transfer_done >=
311	runtime->period_size) {
312	cxsc->capture_transfer_done -=
313	runtime->period_size;
314	period_elapsed = 1;
315	}
316
317	snd_pcm_stream_unlock(substream);
318
319	if (period_elapsed)
320	snd_pcm_period_elapsed(substream);
321	}
322
323	int snd_cx18_pcm_create(struct snd_cx18_card *cxsc)
f9b071c7 AW	324	{
	325	struct snd_pcm *sp;
	326	struct snd_card *sc = cxsc->sc;
	327	struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
	328	struct cx18 *cx = to_cx18(v4l2_dev);
	329	int ret;
	330
	331	ret = snd_pcm_new(sc, "CX23418 PCM",
	332	0, /* PCM device 0, the only one for this card */
	333	0, /* 0 playback substreams */
	334	1, /* 1 capture substream */
	335	&sp);
	336	if (ret) {
	337	CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n",
	338	__func__, ret);
	339	goto err_exit;
	340	}
9972de90 DH	341
	342	spin_lock_init(&cxsc->slock);
	343
	344	snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE, &snd_cx18_pcm_capture_ops);
	345	sp->info_flags = 0;
	346	sp->private_data = cxsc;
5eb9978f	347	strlcpy(sp->name, cx->card_name, sizeof(sp->name));
9972de90	348
f9b071c7 AW	349	return 0;
	350
	351	err_exit:
	352	return ret;
	353	}