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
23 static 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
36 static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
37 .pcm_hardware = &ep93xx_pcm_hardware,
38 .prealloc_buffer_size = 131072,
39 };
40
devm_ep93xx_pcm_platform_register(struct device * dev)41 int devm_ep93xx_pcm_platform_register(struct device *dev)
42 {
43 return devm_snd_dmaengine_pcm_register(dev,
44 &ep93xx_dmaengine_pcm_config, 0);
45 }
46 EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
47
48 MODULE_AUTHOR("Ryan Mallon");
49 MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
50 MODULE_LICENSE("GPL");
51