dmaengine.c
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/*
* dmaengine.c - Samsung dmaengine wrapper
*
* Author: Mark Brown <broonie@linaro.org>
* Copyright 2013 Linaro
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/amba/pl08x.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "dma.h"
#ifdef CONFIG_ARCH_S3C64XX
#define filter_fn pl08x_filter_id
#else
#define filter_fn NULL
#endif
static const struct snd_dmaengine_pcm_config samsung_dmaengine_pcm_config = {
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.compat_filter_fn = filter_fn,
};
void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
struct s3c_dma_params *playback,
struct s3c_dma_params *capture)
{
struct snd_dmaengine_dai_dma_data *playback_data = NULL;
struct snd_dmaengine_dai_dma_data *capture_data = NULL;
if (playback) {
playback_data = &playback->dma_data;
playback_data->filter_data = (void *)playback->channel;
playback_data->chan_name = playback->ch_name;
playback_data->addr = playback->dma_addr;
playback_data->addr_width = playback->dma_size;
}
if (capture) {
capture_data = &capture->dma_data;
capture_data->filter_data = (void *)capture->channel;
capture_data->chan_name = capture->ch_name;
capture_data->addr = capture->dma_addr;
capture_data->addr_width = capture->dma_size;
}
snd_soc_dai_init_dma_data(dai, playback_data, capture_data);
}
EXPORT_SYMBOL_GPL(samsung_asoc_init_dma_data);
int samsung_asoc_dma_platform_register(struct device *dev)
{
return snd_dmaengine_pcm_register(dev, &samsung_dmaengine_pcm_config,
SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME |
SND_DMAENGINE_PCM_FLAG_COMPAT);
}
EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
void samsung_asoc_dma_platform_unregister(struct device *dev)
{
return snd_dmaengine_pcm_unregister(dev);
}
EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_unregister);
MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
MODULE_LICENSE("GPL");