1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * This code is based on code copyrighted by Freescale,
8*4882a593Smuzhiyun * Liam Girdwood, Javier Martin and probably others.
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun #include <linux/platform_device.h>
11*4882a593Smuzhiyun #include <linux/dmaengine.h>
12*4882a593Smuzhiyun #include <linux/types.h>
13*4882a593Smuzhiyun #include <linux/module.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <sound/core.h>
16*4882a593Smuzhiyun #include <sound/pcm.h>
17*4882a593Smuzhiyun #include <sound/soc.h>
18*4882a593Smuzhiyun #include <sound/dmaengine_pcm.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include "imx-pcm.h"
21*4882a593Smuzhiyun
filter(struct dma_chan * chan,void * param)22*4882a593Smuzhiyun static bool filter(struct dma_chan *chan, void *param)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun if (!imx_dma_is_general_purpose(chan))
25*4882a593Smuzhiyun return false;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun chan->private = param;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun return true;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
33*4882a593Smuzhiyun .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
34*4882a593Smuzhiyun .compat_filter_fn = filter,
35*4882a593Smuzhiyun };
36*4882a593Smuzhiyun
imx_pcm_dma_init(struct platform_device * pdev,size_t size)37*4882a593Smuzhiyun int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun struct snd_dmaengine_pcm_config *config;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun config = devm_kzalloc(&pdev->dev,
42*4882a593Smuzhiyun sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
43*4882a593Smuzhiyun if (!config)
44*4882a593Smuzhiyun return -ENOMEM;
45*4882a593Smuzhiyun *config = imx_dmaengine_pcm_config;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return devm_snd_dmaengine_pcm_register(&pdev->dev,
48*4882a593Smuzhiyun config,
49*4882a593Smuzhiyun SND_DMAENGINE_PCM_FLAG_COMPAT);
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun MODULE_LICENSE("GPL");
54