1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * ALSA PCM interface for ST SPEAr Processors
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * sound/soc/spear/spear_pcm.c
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2012 ST Microelectronics
7*4882a593Smuzhiyun * Rajeev Kumar<rajeevkumar.linux@gmail.com>
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * This file is licensed under the terms of the GNU General Public
10*4882a593Smuzhiyun * License version 2. This program is licensed "as is" without any
11*4882a593Smuzhiyun * warranty of any kind, whether express or implied.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/dmaengine.h>
16*4882a593Smuzhiyun #include <linux/platform_device.h>
17*4882a593Smuzhiyun #include <sound/dmaengine_pcm.h>
18*4882a593Smuzhiyun #include <sound/pcm.h>
19*4882a593Smuzhiyun #include <sound/soc.h>
20*4882a593Smuzhiyun #include <sound/spear_dma.h>
21*4882a593Smuzhiyun #include "spear_pcm.h"
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static const struct snd_pcm_hardware spear_pcm_hardware = {
24*4882a593Smuzhiyun .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
25*4882a593Smuzhiyun SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
26*4882a593Smuzhiyun SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
27*4882a593Smuzhiyun .buffer_bytes_max = 16 * 1024, /* max buffer size */
28*4882a593Smuzhiyun .period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
29*4882a593Smuzhiyun .period_bytes_max = 2 * 1024, /* maximum period size */
30*4882a593Smuzhiyun .periods_min = 1, /* min # periods */
31*4882a593Smuzhiyun .periods_max = 8, /* max # of periods */
32*4882a593Smuzhiyun .fifo_size = 0, /* fifo size in bytes */
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
36*4882a593Smuzhiyun .pcm_hardware = &spear_pcm_hardware,
37*4882a593Smuzhiyun .prealloc_buffer_size = 16 * 1024,
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
devm_spear_pcm_platform_register(struct device * dev,struct snd_dmaengine_pcm_config * config,bool (* filter)(struct dma_chan * chan,void * slave))40*4882a593Smuzhiyun int devm_spear_pcm_platform_register(struct device *dev,
41*4882a593Smuzhiyun struct snd_dmaengine_pcm_config *config,
42*4882a593Smuzhiyun bool (*filter)(struct dma_chan *chan, void *slave))
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun *config = spear_dmaengine_pcm_config;
45*4882a593Smuzhiyun config->compat_filter_fn = filter;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return devm_snd_dmaengine_pcm_register(dev, config,
48*4882a593Smuzhiyun SND_DMAENGINE_PCM_FLAG_NO_DT |
49*4882a593Smuzhiyun SND_DMAENGINE_PCM_FLAG_COMPAT);
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
54*4882a593Smuzhiyun MODULE_DESCRIPTION("SPEAr PCM DMA module");
55*4882a593Smuzhiyun MODULE_LICENSE("GPL");
56