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/*
* dma-wrapper.c -- I2S DMA Platform Wrapper Driver
*
* * Copyright (c) 2010 Samsung Electronics Co. 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.
*/
#include <sound/soc.h>
#include "dma.h"
#include "idma.h"
#ifdef CONFIG_SND_SOC_SAMSUNG_USE_DMA_WRAPPER
static struct snd_soc_platform_driver *asoc_get_platform(struct snd_pcm *pcm)
{
struct snd_soc_pcm_runtime *rtd = pcm->private_data;
const char *cpu_dai_name = rtd->cpu_dai->name;
if (!strcmp(cpu_dai_name, "samsung-i2s.4"))
return &samsung_asoc_idma_platform;
else
return &samsung_asoc_platform;
}
static int asoc_platform_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->hw_params)
return platform->ops->hw_params(substream, params);
else
return 0;
}
static int asoc_platform_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->hw_free)
return platform->ops->hw_free(substream);
else
return 0;
}
static int asoc_platform_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->prepare)
return platform->ops->prepare(substream);
else
return 0;
}
static int asoc_platform_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->trigger)
return platform->ops->trigger(substream, cmd);
else
return 0;
}
static snd_pcm_uframes_t
asoc_platform_pointer(struct snd_pcm_substream *substream)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->pointer)
return platform->ops->pointer(substream);
else
return 0;
}
static int asoc_platform_open(struct snd_pcm_substream *substream)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->open)
return platform->ops->open(substream);
else
return 0;
}
static int asoc_platform_close(struct snd_pcm_substream *substream)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->close)
return platform->ops->close(substream);
else
return 0;
}
static int asoc_platform_ioctl(struct snd_pcm_substream *substream,
unsigned int cmd, void *arg)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->ioctl)
return platform->ops->ioctl(substream, cmd, arg);
else
return 0;
}
static int asoc_platform_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
struct snd_soc_platform_driver *platform =
asoc_get_platform(substream->pcm);
if (platform->ops->mmap)
return platform->ops->mmap(substream, vma);
else
return 0;
}
static struct snd_pcm_ops asoc_platform_ops = {
.open = asoc_platform_open,
.close = asoc_platform_close,
.ioctl = asoc_platform_ioctl,
.hw_params = asoc_platform_hw_params,
.hw_free = asoc_platform_hw_free,
.prepare = asoc_platform_prepare,
.trigger = asoc_platform_trigger,
.pointer = asoc_platform_pointer,
.mmap = asoc_platform_mmap,
};
static void asoc_platform_free_dma_buffers(struct snd_pcm *pcm)
{
struct snd_soc_platform_driver *platform = asoc_get_platform(pcm);
if (platform->pcm_free)
platform->pcm_free(pcm);
}
static int asoc_platform_new(struct snd_card *card,
struct snd_soc_dai *dai, struct snd_pcm *pcm)
{
struct snd_soc_platform_driver *platform = asoc_get_platform(pcm);
if (platform->pcm_new)
platform->pcm_new(card, dai, pcm);
return 0;
}
static struct snd_soc_platform_driver asoc_dma_platform = {
.ops = &asoc_platform_ops,
.pcm_new = asoc_platform_new,
.pcm_free = asoc_platform_free_dma_buffers,
};
static int __devinit samsung_asoc_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_platform(&pdev->dev, &asoc_dma_platform);
}
static int __devexit samsung_asoc_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static struct platform_driver asoc_platform_driver = {
.driver = {
.name = "samsung-audio",
.owner = THIS_MODULE,
},
.probe = samsung_asoc_platform_probe,
.remove = __devexit_p(samsung_asoc_platform_remove),
};
static int __init samsung_asoc_init(void)
{
return platform_driver_register(&asoc_platform_driver);
}
module_init(samsung_asoc_init);
static void __exit samsung_asoc_exit(void)
{
platform_driver_unregister(&asoc_platform_driver);
}
module_exit(samsung_asoc_exit);
#endif
MODULE_DESCRIPTION("Samsung ASoC DMA wrapper");
MODULE_LICENSE("GPL");
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