linux/drivers/media/pci/cobalt/cobalt-alsa-pcm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  ALSA PCM device for the
 *  ALSA interface to cobalt PCM capture streams
 *
 *  Copyright 2014-2015 Cisco Systems, Inc. and/or its affiliates.
 *  All rights reserved.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>

#include <media/v4l2-device.h>

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

#include "cobalt-driver.h"
#include "cobalt-alsa.h"
#include "cobalt-alsa-pcm.h"

static unsigned int pcm_debug;
module_param(pcm_debug, int, 0644);
MODULE_PARM_DESC(…) …;

#define dprintk(fmt, arg...) …

static const struct snd_pcm_hardware snd_cobalt_hdmi_capture = …;

static const struct snd_pcm_hardware snd_cobalt_playback = …;

static void sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
{ … }

static void cobalt_alsa_announce_pcm_data(struct snd_cobalt_card *cobsc,
					u8 *pcm_data,
					size_t skip,
					size_t samples)
{ … }

static int alsa_fnc(struct vb2_buffer *vb, void *priv)
{ … }

static int snd_cobalt_pcm_capture_open(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_capture_close(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_prepare(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{ … }

static
snd_pcm_uframes_t snd_cobalt_pcm_pointer(struct snd_pcm_substream *substream)
{ … }

static void pb_sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
{ … }

static void cobalt_alsa_pb_pcm_data(struct snd_cobalt_card *cobsc,
					u8 *pcm_data,
					size_t skip,
					size_t samples)
{ … }

static int alsa_pb_fnc(struct vb2_buffer *vb, void *priv)
{ … }

static int snd_cobalt_pcm_playback_open(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_playback_close(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_pb_prepare(struct snd_pcm_substream *substream)
{ … }

static int snd_cobalt_pcm_pb_trigger(struct snd_pcm_substream *substream,
				     int cmd)
{ … }

static
snd_pcm_uframes_t snd_cobalt_pcm_pb_pointer(struct snd_pcm_substream *substream)
{ … }

static const struct snd_pcm_ops snd_cobalt_pcm_capture_ops = …;

static const struct snd_pcm_ops snd_cobalt_pcm_playback_ops = …;

int snd_cobalt_pcm_create(struct snd_cobalt_card *cobsc)
{ … }