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/*
* tegra_tdm_pcm.c - Tegra TDM PCM driver
*
* Author: Nitin Pai <npai@nvidia.com>
* Copyright (C) 2010 - NVIDIA, Inc.
*
* Based on code copyright/by:
*
* Copyright (c) 2009-2010, NVIDIA Corporation.
* Scott Peterson <speterson@nvidia.com>
* Stephen Warren <swarren@nvidia.com>
* Vijay Mali <vmali@nvidia.com>
*
* Copyright (C) 2010 Google, Inc.
* Iliyan Malchev <malchev@google.com>
*
* 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.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "tegra_pcm.h"
#define DRV_NAME "tegra-tdm-pcm-audio"
static const struct snd_pcm_hardware tegra_tdm_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_INTERLEAVED,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.channels_min = 8,
.channels_max = 16,
.period_bytes_min = 16 * 1024,
.period_bytes_max = 16 * 1024,
.periods_min = 4,
.periods_max = 4,
.buffer_bytes_max = 16 * 4 * 1024,
.fifo_size = 4,
};
static int tegra_tdm_pcm_open(struct snd_pcm_substream *substream)
{
return tegra_pcm_allocate(substream,
TEGRA_DMA_MODE_CONTINUOUS_DOUBLE,
&tegra_tdm_pcm_hardware);
}
static int tegra_tdm_pcm_close(struct snd_pcm_substream *substream)
{
return tegra_pcm_close(substream);
}
static int tegra_tdm_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
return tegra_pcm_hw_params(substream, params);
}
static int tegra_tdm_pcm_hw_free(struct snd_pcm_substream *substream)
{
return tegra_pcm_hw_free(substream);
}
static int tegra_tdm_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
return tegra_pcm_trigger(substream, cmd);
}
static int tegra_tdm_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
return tegra_pcm_mmap(substream, vma);
}
static struct snd_pcm_ops tegra_tdm_pcm_ops = {
.open = tegra_tdm_pcm_open,
.close = tegra_tdm_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = tegra_tdm_pcm_hw_params,
.hw_free = tegra_tdm_pcm_hw_free,
.trigger = tegra_tdm_pcm_trigger,
.pointer = tegra_pcm_pointer,
.mmap = tegra_tdm_pcm_mmap,
};
static int tegra_tdm_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
return tegra_pcm_dma_allocate(rtd ,
tegra_tdm_pcm_hardware.buffer_bytes_max);
}
static void tegra_tdm_pcm_free(struct snd_pcm *pcm)
{
return tegra_pcm_free(pcm);
}
struct snd_soc_platform_driver tegra_tdm_pcm_platform = {
.ops = &tegra_tdm_pcm_ops,
.pcm_new = tegra_tdm_pcm_new,
.pcm_free = tegra_tdm_pcm_free,
};
static int __devinit tegra_tdm_pcm_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_platform(&pdev->dev, &tegra_tdm_pcm_platform);
}
static int __devexit tegra_tdm_pcm_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_platform(&pdev->dev);
return 0;
}
static struct platform_driver tegra_tdm_pcm_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = tegra_tdm_pcm_platform_probe,
.remove = __devexit_p(tegra_tdm_pcm_platform_remove),
};
static int __init snd_tegra_tdm_pcm_init(void)
{
return platform_driver_register(&tegra_tdm_pcm_driver);
}
module_init(snd_tegra_tdm_pcm_init);
static void __exit snd_tegra_tdm_pcm_exit(void)
{
platform_driver_unregister(&tegra_tdm_pcm_driver);
}
module_exit(snd_tegra_tdm_pcm_exit);
MODULE_AUTHOR("Nitin Pai <npai@nvidia.com>");
MODULE_DESCRIPTION("Tegra PCM ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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