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/*
* Copyright (C) ST-Ericsson SA 2012
*
* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
* Roger Nilsson <roger.xr.nilsson@stericsson.com>
* for ST-Ericsson.
*
* License terms:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <asm/page.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/slab.h>
#include <linux/platform_data/dma-ste-dma40.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
#include "ux500_msp_i2s.h"
#include "ux500_pcm.h"
#define UX500_PLATFORM_PERIODS_BYTES_MIN 128
#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
#define UX500_PLATFORM_PERIODS_MIN 2
#define UX500_PLATFORM_PERIODS_MAX 48
#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
static const struct snd_pcm_hardware ux500_pcm_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_PAUSE,
.buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
.period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
.period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
.periods_min = UX500_PLATFORM_PERIODS_MIN,
.periods_max = UX500_PLATFORM_PERIODS_MAX,
};
static const struct snd_dmaengine_pcm_config ux500_dmaengine_of_pcm_config = {
.pcm_hardware = &ux500_pcm_hw,
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.prealloc_buffer_size = UX500_PLATFORM_BUFFER_BYTES_MAX,
};
int ux500_pcm_register_platform(struct platform_device *pdev)
{
const struct snd_dmaengine_pcm_config *pcm_config;
int ret;
pcm_config = &ux500_dmaengine_of_pcm_config;
ret = snd_dmaengine_pcm_register(&pdev->dev, pcm_config,
SND_DMAENGINE_PCM_FLAG_COMPAT);
if (ret < 0) {
dev_err(&pdev->dev,
"%s: ERROR: Failed to register platform '%s' (%d)!\n",
__func__, pdev->name, ret);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
int ux500_pcm_unregister_platform(struct platform_device *pdev)
{
snd_dmaengine_pcm_unregister(&pdev->dev);
return 0;
}
EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);
MODULE_AUTHOR("Ola Lilja");
MODULE_AUTHOR("Roger Nilsson");
MODULE_DESCRIPTION("ASoC UX500 driver");
MODULE_LICENSE("GPL v2");
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