linux/sound/soc/dwc/dwc-pcm.c

/*
 * ALSA SoC Synopsys PIO PCM for I2S driver
 *
 * sound/soc/dwc/designware_pcm.c
 *
 * Copyright (C) 2016 Synopsys
 * Jose Abreu <[email protected]>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/io.h>
#include <linux/rcupdate.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "local.h"

#define BUFFER_BYTES_MAX …
#define PERIOD_BYTES_MIN …
#define PERIODS_MIN …

#define dw_pcm_tx_fn …

#define dw_pcm_rx_fn …

dw_pcm_tx_fn(16);
dw_pcm_tx_fn(32);
dw_pcm_rx_fn(16);
dw_pcm_rx_fn(32);

#undef dw_pcm_tx_fn
#undef dw_pcm_rx_fn

static const struct snd_pcm_hardware dw_pcm_hardware = …;

static void dw_pcm_transfer(struct dw_i2s_dev *dev, bool push)
{ … }

void dw_pcm_push_tx(struct dw_i2s_dev *dev)
{ … }

void dw_pcm_pop_rx(struct dw_i2s_dev *dev)
{ … }

static int dw_pcm_open(struct snd_soc_component *component,
		       struct snd_pcm_substream *substream)
{ … }

static int dw_pcm_close(struct snd_soc_component *component,
			struct snd_pcm_substream *substream)
{ … }

static int dw_pcm_hw_params(struct snd_soc_component *component,
			    struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *hw_params)
{ … }

static int dw_pcm_trigger(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream, int cmd)
{ … }

static snd_pcm_uframes_t dw_pcm_pointer(struct snd_soc_component *component,
					struct snd_pcm_substream *substream)
{ … }

static int dw_pcm_new(struct snd_soc_component *component,
		      struct snd_soc_pcm_runtime *rtd)
{ … }

static const struct snd_soc_component_driver dw_pcm_component = …;

int dw_pcm_register(struct platform_device *pdev)
{ … }