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