56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*
|
|
* ALSA PCM interface for ST SPEAr Processors
|
|
*
|
|
* sound/soc/spear/spear_pcm.c
|
|
*
|
|
* Copyright (C) 2012 ST Microelectronics
|
|
* Rajeev Kumar<rajeevkumar.linux@gmail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/platform_device.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/spear_dma.h>
|
|
#include "spear_pcm.h"
|
|
|
|
static const struct snd_pcm_hardware spear_pcm_hardware = {
|
|
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
|
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
|
|
.buffer_bytes_max = 16 * 1024, /* max buffer size */
|
|
.period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
|
|
.period_bytes_max = 2 * 1024, /* maximum period size */
|
|
.periods_min = 1, /* min # periods */
|
|
.periods_max = 8, /* max # of periods */
|
|
.fifo_size = 0, /* fifo size in bytes */
|
|
};
|
|
|
|
static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
|
|
.pcm_hardware = &spear_pcm_hardware,
|
|
.prealloc_buffer_size = 16 * 1024,
|
|
};
|
|
|
|
int devm_spear_pcm_platform_register(struct device *dev,
|
|
struct snd_dmaengine_pcm_config *config,
|
|
bool (*filter)(struct dma_chan *chan, void *slave))
|
|
{
|
|
*config = spear_dmaengine_pcm_config;
|
|
config->compat_filter_fn = filter;
|
|
|
|
return devm_snd_dmaengine_pcm_register(dev, config,
|
|
SND_DMAENGINE_PCM_FLAG_NO_DT |
|
|
SND_DMAENGINE_PCM_FLAG_COMPAT);
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);
|
|
|
|
MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
|
|
MODULE_DESCRIPTION("SPEAr PCM DMA module");
|
|
MODULE_LICENSE("GPL");
|