ep93xx-pcm.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
 4 *
 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 6 * Copyright (C) 2006 Applied Data Systems
 7 *
 8 * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
 9 *   Copyright (c) 2008 Ryan Mallon
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/platform_device.h>
15#include <linux/dmaengine.h>
16
17#include <sound/pcm.h>
18#include <sound/soc.h>
19#include <sound/dmaengine_pcm.h>
20
21#include "ep93xx-pcm.h"
22
23static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
24	.info			= (SNDRV_PCM_INFO_MMAP		|
25				   SNDRV_PCM_INFO_MMAP_VALID	|
26				   SNDRV_PCM_INFO_INTERLEAVED	|
27				   SNDRV_PCM_INFO_BLOCK_TRANSFER),
28	.buffer_bytes_max	= 131072,
29	.period_bytes_min	= 32,
30	.period_bytes_max	= 32768,
31	.periods_min		= 1,
32	.periods_max		= 32,
33	.fifo_size		= 32,
34};
35
36static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
37	.pcm_hardware = &ep93xx_pcm_hardware,
38	.prealloc_buffer_size = 131072,
39};
40
41int devm_ep93xx_pcm_platform_register(struct device *dev)
42{
43	return devm_snd_dmaengine_pcm_register(dev,
44		&ep93xx_dmaengine_pcm_config, 0);
45}
46EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
47
48MODULE_AUTHOR("Ryan Mallon");
49MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
50MODULE_LICENSE("GPL");