marvell/linux/sound/soc/pxa/pxa-pcm.c

/*
 * Copyright (C) 2013 Marvell International Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/module.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
#include <linux/dma/pxa-dma.h>

static const struct snd_pcm_hardware pxa_pcm_hardware = {
	.info			= SNDRV_PCM_INFO_MMAP |
				  SNDRV_PCM_INFO_MMAP_VALID |
				  SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_PAUSE |
				  SNDRV_PCM_INFO_RESUME,
	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S24_LE |
				  SNDRV_PCM_FMTBIT_S32_LE,
	.period_bytes_min	= 32,
	.period_bytes_max	= 8192 - 32,
	.periods_min		= 1,
	.periods_max		= 256, //PAGE_SIZE/sizeof(pxa_dma_desc),
	.buffer_bytes_max	= 128 * 1024,
	.fifo_size		= 32,
};

static const struct snd_dmaengine_pcm_config pxa_dmaengine_pcm_config = {
	.pcm_hardware = &pxa_pcm_hardware,
	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
	.prealloc_buffer_size = 128 * 1024,
};

int pxa_pcm_platform_register(struct device *dev)
{
	return snd_dmaengine_pcm_register(dev, &pxa_dmaengine_pcm_config, 0);
}
EXPORT_SYMBOL_GPL(pxa_pcm_platform_register);

void pxa_pcm_platform_unregister(struct device *dev)
{
	snd_dmaengine_pcm_unregister(dev);
}
EXPORT_SYMBOL_GPL(pxa_pcm_platform_unregister);

MODULE_LICENSE("GPL");