42a74e7747
The DMA channel names are specified through struct snd_dmaengine_pcm_config rather than using SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag when booting with devicetree in order to properly support deferred probing. Without this change the sound machine driver initialization can complete successfully with unavailable DMA resources. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
|
|
* 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 <linux/platform_data/dma-s3c24xx.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"
|
|
|
|
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 = playback->slave;
|
|
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 = capture->slave;
|
|
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, dma_filter_fn filter,
|
|
const char *tx, const char *rx)
|
|
{
|
|
unsigned int flags = SND_DMAENGINE_PCM_FLAG_COMPAT;
|
|
|
|
struct snd_dmaengine_pcm_config *pcm_conf;
|
|
|
|
pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL);
|
|
if (!pcm_conf)
|
|
return -ENOMEM;
|
|
|
|
pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
|
|
pcm_conf->compat_filter_fn = filter;
|
|
|
|
if (dev->of_node) {
|
|
pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
|
|
pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
|
|
} else {
|
|
flags |= SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME;
|
|
}
|
|
|
|
return devm_snd_dmaengine_pcm_register(dev, pcm_conf, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
|
|
|
|
MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
|
|
MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
|
|
MODULE_LICENSE("GPL");
|