1/*
2 * ALSA PCM interface for ST SPEAr Processors
3 *
4 * sound/soc/spear/spear_pcm.c
5 *
6 * Copyright (C) 2012 ST Microelectronics
7 * Rajeev Kumar<rajeevkumar.linux@gmail.com>
8 *
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
12 */
13
14#include <linux/module.h>
15#include <linux/dmaengine.h>
16#include <linux/platform_device.h>
17#include <sound/dmaengine_pcm.h>
18#include <sound/pcm.h>
19#include <sound/soc.h>
20#include <sound/spear_dma.h>
21#include "spear_pcm.h"
22
23static const struct snd_pcm_hardware spear_pcm_hardware = {
24	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
25		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
26		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
27	.buffer_bytes_max = 16 * 1024, /* max buffer size */
28	.period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
29	.period_bytes_max = 2 * 1024, /* maximum period size */
30	.periods_min = 1, /* min # periods */
31	.periods_max = 8, /* max # of periods */
32	.fifo_size = 0, /* fifo size in bytes */
33};
34
35static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
36	.pcm_hardware = &spear_pcm_hardware,
37	.prealloc_buffer_size = 16 * 1024,
38};
39
40int devm_spear_pcm_platform_register(struct device *dev,
41			struct snd_dmaengine_pcm_config *config,
42			bool (*filter)(struct dma_chan *chan, void *slave))
43{
44	*config = spear_dmaengine_pcm_config;
45	config->compat_filter_fn = filter;
46
47	return devm_snd_dmaengine_pcm_register(dev, config,
48		SND_DMAENGINE_PCM_FLAG_NO_DT |
49		SND_DMAENGINE_PCM_FLAG_COMPAT);
50}
51EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);
52
53MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
54MODULE_DESCRIPTION("SPEAr PCM DMA module");
55MODULE_LICENSE("GPL");
56