linux/sound/soc/samsung/dma.h

/*
 *  dma.h --
 *
 *  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.
 *
 *  ALSA PCM interface for the Samsung SoC
 */

#ifndef _S3C_AUDIO_H
#define _S3C_AUDIO_H

#include <sound/dmaengine_pcm.h>
#include <linux/dmaengine.h>

struct s3c_dma_params {
	void *slave;				/* Channel ID */
	dma_addr_t dma_addr;
	int dma_size;			/* Size of the DMA transfer */
	char *ch_name;
	struct snd_dmaengine_dai_dma_data dma_data;
};

void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
				struct s3c_dma_params *playback,
				struct s3c_dma_params *capture);
/*
 * @tx, @rx arguments can be NULL if the DMA channel names are "tx", "rx",
 * otherwise actual DMA channel names must be passed to this function.
 */
int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
				       const char *tx, const char *rx);
#endif