linux/sound/soc/sprd/sprd-pcm-dma.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2019 Spreadtrum Communications Inc.

#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/dma/sprd-dma.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "sprd-pcm-dma.h"

#define SPRD_PCM_DMA_LINKLIST_SIZE …
#define SPRD_PCM_DMA_BRUST_LEN …

struct sprd_pcm_dma_data { … };

struct sprd_pcm_dma_private { … };

static const struct snd_pcm_hardware sprd_pcm_hardware = …;

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

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

static void sprd_pcm_dma_complete(void *data)
{ … }

static void sprd_pcm_release_dma_channel(struct snd_pcm_substream *substream)
{ … }

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

static int sprd_pcm_hw_params(struct snd_soc_component *component,
			      struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params)
{ … }

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

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

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

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

static const struct snd_soc_component_driver sprd_soc_component = …;

static int sprd_soc_platform_probe(struct platform_device *pdev)
{ … }

static const struct of_device_id sprd_pcm_of_match[] = …;
MODULE_DEVICE_TABLE(of, sprd_pcm_of_match);

static struct platform_driver sprd_pcm_driver = …;

module_platform_driver(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS(…) …;