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/*
* ALSA SoC SPDIF Audio Layer for MXS
*
* Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
*
* Based on stmp3xxx_spdif_dai.c
* Vladimir Barinov <vbarinov@embeddedalley.com>
* Copyright 2008 SigmaTel, Inc
* Copyright 2008 Embedded Alley Solutions, Inc
*
* 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/init.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <mach/dma.h>
#include <mach/hardware.h>
#include "../codecs/mxc_spdif.h"
#define MXC_SPDIF_TXFIFO_WML 0x8
#define MXC_SPDIF_RXFIFO_WML 0x8
struct imx_pcm_dma_params dma_params_tx;
struct imx_pcm_dma_params dma_params_rx;
static int imx_spdif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
/* Tx/Rx config */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_soc_dai_set_dma_data(cpu_dai, substream, &dma_params_tx);
else
snd_soc_dai_set_dma_data(cpu_dai, substream, &dma_params_rx);
return 0;
}
struct snd_soc_dai_ops imx_spdif_dai_ops = {
.hw_params = imx_spdif_hw_params,
};
struct snd_soc_dai_driver imx_spdif_dai = {
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = MXC_SPDIF_RATES_PLAYBACK,
.formats = MXC_SPDIF_FORMATS_PLAYBACK,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = MXC_SPDIF_RATES_CAPTURE,
.formats = MXC_SPDIF_FORMATS_CAPTURE,
},
.ops = &imx_spdif_dai_ops,
};
static int imx_spdif_dai_probe(struct platform_device *pdev)
{
struct resource *res;
int ret = 0;
dma_params_tx.burstsize = MXC_SPDIF_TXFIFO_WML;
dma_params_rx.burstsize = MXC_SPDIF_RXFIFO_WML;
dma_params_tx.peripheral_type = IMX_DMATYPE_SPDIF;
dma_params_rx.peripheral_type = IMX_DMATYPE_SPDIF;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
if (res)
dma_params_tx.dma = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
if (res)
dma_params_rx.dma = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx_reg");
if (res)
dma_params_tx.dma_addr = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx_reg");
if (res)
dma_params_rx.dma_addr = res->start;
ret = snd_soc_register_dai(&pdev->dev, &imx_spdif_dai);
if (ret) {
dev_err(&pdev->dev, "register DAI failed\n");
goto failed_register;
}
return 0;
failed_register:
return ret;
}
static int __devexit imx_spdif_dai_remove(struct platform_device *pdev)
{
snd_soc_unregister_dai(&pdev->dev);
return 0;
}
static struct platform_driver imx_ssi_driver = {
.probe = imx_spdif_dai_probe,
.remove = __devexit_p(imx_spdif_dai_remove),
.driver = {
.name = "imx-spdif-dai",
.owner = THIS_MODULE,
},
};
static int __init imx_spdif_dai_init(void)
{
return platform_driver_register(&imx_ssi_driver);
}
static void __exit imx_spdif_dai_exit(void)
{
platform_driver_unregister(&imx_ssi_driver);
}
module_init(imx_spdif_dai_init);
module_exit(imx_spdif_dai_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("IMX SPDIF DAI");
MODULE_LICENSE("GPL");
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