blob: 314814ddd2b0a406799058df39611c1dafd8935e [file] [log] [blame]
* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
* Copyright 2009 Sascha Hauer <>
* This code is based on code copyrighted by Freescale,
* Liam Girdwood, Javier Martin and probably others.
* 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.
#include <linux/platform_device.h>
#include <linux/dmaengine.h>
#include <linux/types.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
#include "imx-pcm.h"
static bool filter(struct dma_chan *chan, void *param)
if (!imx_dma_is_general_purpose(chan))
return false;
chan->private = param;
return true;
static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.compat_filter_fn = filter,
int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
struct snd_dmaengine_pcm_config *config;
config = devm_kzalloc(&pdev->dev,
sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
if (!config)
return -ENOMEM;
*config = imx_dmaengine_pcm_config;
return devm_snd_dmaengine_pcm_register(&pdev->dev,