1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
4  *
5  * Based on sound/soc/imx/imx-pcm-dma-mx2.c
6  */
7 
8 #include <linux/device.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 
12 #include <sound/core.h>
13 #include <sound/pcm.h>
14 #include <sound/soc.h>
15 #include <sound/dmaengine_pcm.h>
16 
17 #include "mxs-pcm.h"
18 
19 static const struct snd_pcm_hardware snd_mxs_hardware = {
20 	.info			= SNDRV_PCM_INFO_MMAP |
21 				  SNDRV_PCM_INFO_MMAP_VALID |
22 				  SNDRV_PCM_INFO_PAUSE |
23 				  SNDRV_PCM_INFO_RESUME |
24 				  SNDRV_PCM_INFO_INTERLEAVED |
25 				  SNDRV_PCM_INFO_HALF_DUPLEX,
26 	.period_bytes_min	= 32,
27 	.period_bytes_max	= 8192,
28 	.periods_min		= 1,
29 	.periods_max		= 52,
30 	.buffer_bytes_max	= 64 * 1024,
31 	.fifo_size		= 32,
32 };
33 
34 static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {
35 	.pcm_hardware = &snd_mxs_hardware,
36 	.prealloc_buffer_size = 64 * 1024,
37 };
38 
mxs_pcm_platform_register(struct device * dev)39 int mxs_pcm_platform_register(struct device *dev)
40 {
41 	return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,
42 		SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);
43 }
44 EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);
45 
46 MODULE_LICENSE("GPL");
47