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53 lines
1.2 KiB
53 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer |
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* |
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* Copyright 2009 Sascha Hauer <[email protected]> |
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* |
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* This code is based on code copyrighted by Freescale, |
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* Liam Girdwood, Javier Martin and probably others. |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/dmaengine.h> |
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#include <linux/types.h> |
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#include <linux/module.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/soc.h> |
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#include <sound/dmaengine_pcm.h> |
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#include "imx-pcm.h" |
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static bool filter(struct dma_chan *chan, void *param) |
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{ |
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if (!imx_dma_is_general_purpose(chan)) |
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return false; |
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chan->private = param; |
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return true; |
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} |
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static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = { |
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.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, |
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.compat_filter_fn = filter, |
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}; |
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int imx_pcm_dma_init(struct platform_device *pdev) |
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{ |
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struct snd_dmaengine_pcm_config *config; |
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config = devm_kzalloc(&pdev->dev, |
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sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL); |
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if (!config) |
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return -ENOMEM; |
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*config = imx_dmaengine_pcm_config; |
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return devm_snd_dmaengine_pcm_register(&pdev->dev, |
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config, |
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SND_DMAENGINE_PCM_FLAG_COMPAT); |
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} |
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EXPORT_SYMBOL_GPL(imx_pcm_dma_init); |
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MODULE_LICENSE("GPL");
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