linux/sound/soc/uniphier/aio-dma.c

// SPDX-License-Identifier: GPL-2.0
//
// Socionext UniPhier AIO DMA driver.
//
// Copyright (c) 2016-2018 Socionext Inc.

#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include "aio.h"

static const struct snd_pcm_hardware uniphier_aiodma_hw = …;

static void aiodma_pcm_irq(struct uniphier_aio_sub *sub)
{ … }

static void aiodma_compr_irq(struct uniphier_aio_sub *sub)
{ … }

static irqreturn_t aiodma_irq(int irq, void *p)
{ … }

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

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

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

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

static int uniphier_aiodma_mmap(struct snd_soc_component *component,
				struct snd_pcm_substream *substream,
				struct vm_area_struct *vma)
{ … }

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

static const struct snd_soc_component_driver uniphier_soc_platform = …;

static const struct regmap_config aiodma_regmap_config = …;

/**
 * uniphier_aiodma_soc_register_platform - register the AIO DMA
 * @pdev: the platform device
 *
 * Register and setup the DMA of AIO to transfer the sound data to device.
 * This function need to call once at driver startup and need NOT to call
 * unregister function.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int uniphier_aiodma_soc_register_platform(struct platform_device *pdev)
{ … }
EXPORT_SYMBOL_GPL(…);