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/*
* overo . c - - SoC audio for Gumstix Overo
*
* Author : Steve Sakoman < steve @ sakoman . 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/clk.h>
# include <linux/platform_device.h>
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# include <linux/module.h>
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# include <sound/core.h>
# include <sound/pcm.h>
# include <sound/soc.h>
# include <asm/mach-types.h>
# include <mach/hardware.h>
# include <mach/gpio.h>
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# include <plat/mcbsp.h>
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# include "omap-mcbsp.h"
# include "omap-pcm.h"
static int overo_hw_params ( struct snd_pcm_substream * substream ,
struct snd_pcm_hw_params * params )
{
struct snd_soc_pcm_runtime * rtd = substream - > private_data ;
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struct snd_soc_dai * codec_dai = rtd - > codec_dai ;
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int ret ;
/* Set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk ( codec_dai , 0 , 26000000 ,
SND_SOC_CLOCK_IN ) ;
if ( ret < 0 ) {
printk ( KERN_ERR " can't set codec system clock \n " ) ;
return ret ;
}
return 0 ;
}
static struct snd_soc_ops overo_ops = {
. hw_params = overo_hw_params ,
} ;
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link overo_dai = {
. name = " TWL4030 " ,
. stream_name = " TWL4030 " ,
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. cpu_dai_name = " omap-mcbsp-dai.1 " ,
. codec_dai_name = " twl4030-hifi " ,
. platform_name = " omap-pcm-audio " ,
. codec_name = " twl4030-codec " ,
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. dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM ,
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. ops = & overo_ops ,
} ;
/* Audio machine driver */
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static struct snd_soc_card snd_soc_card_overo = {
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. name = " overo " ,
. dai_link = & overo_dai ,
. num_links = 1 ,
} ;
static struct platform_device * overo_snd_device ;
static int __init overo_soc_init ( void )
{
int ret ;
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if ( ! ( machine_is_overo ( ) | | machine_is_cm_t35 ( ) ) ) {
pr_debug ( " Incomatible machine! \n " ) ;
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return - ENODEV ;
}
printk ( KERN_INFO " overo SoC init \n " ) ;
overo_snd_device = platform_device_alloc ( " soc-audio " , - 1 ) ;
if ( ! overo_snd_device ) {
printk ( KERN_ERR " Platform device allocation failed \n " ) ;
return - ENOMEM ;
}
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platform_set_drvdata ( overo_snd_device , & snd_soc_card_overo ) ;
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ret = platform_device_add ( overo_snd_device ) ;
if ( ret )
goto err1 ;
return 0 ;
err1 :
printk ( KERN_ERR " Unable to add platform device \n " ) ;
platform_device_put ( overo_snd_device ) ;
return ret ;
}
module_init ( overo_soc_init ) ;
static void __exit overo_soc_exit ( void )
{
platform_device_unregister ( overo_snd_device ) ;
}
module_exit ( overo_soc_exit ) ;
MODULE_AUTHOR ( " Steve Sakoman <steve@sakoman.com> " ) ;
MODULE_DESCRIPTION ( " ALSA SoC overo " ) ;
MODULE_LICENSE ( " GPL " ) ;