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/*
* osk5912 . c - - SoC audio for OSK 5912
*
* Copyright ( C ) 2008 Mistral Solutions
*
* Contact : Arun KS < arunks @ mistralsolutions . 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>
# include <sound/core.h>
# include <sound/pcm.h>
# include <sound/soc.h>
# include <sound/soc-dapm.h>
# include <asm/mach-types.h>
# include <mach/hardware.h>
# include <linux/gpio.h>
# include <mach/mcbsp.h>
# include "omap-mcbsp.h"
# include "omap-pcm.h"
# include "../codecs/tlv320aic23.h"
# define CODEC_CLOCK 12000000
static struct clk * tlv320aic23_mclk ;
static int osk_startup ( struct snd_pcm_substream * substream )
{
return clk_enable ( tlv320aic23_mclk ) ;
}
static void osk_shutdown ( struct snd_pcm_substream * substream )
{
clk_disable ( tlv320aic23_mclk ) ;
}
static int osk_hw_params ( struct snd_pcm_substream * substream ,
struct snd_pcm_hw_params * params )
{
struct snd_soc_pcm_runtime * rtd = substream - > private_data ;
struct snd_soc_dai * codec_dai = rtd - > dai - > codec_dai ;
struct snd_soc_dai * cpu_dai = rtd - > dai - > cpu_dai ;
int err ;
/* Set codec DAI configuration */
err = snd_soc_dai_set_fmt ( codec_dai ,
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SND_SOC_DAIFMT_DSP_B |
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SND_SOC_DAIFMT_NB_IF |
SND_SOC_DAIFMT_CBM_CFM ) ;
if ( err < 0 ) {
printk ( KERN_ERR " can't set codec DAI configuration \n " ) ;
return err ;
}
/* Set cpu DAI configuration */
err = snd_soc_dai_set_fmt ( cpu_dai ,
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SND_SOC_DAIFMT_DSP_B |
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SND_SOC_DAIFMT_NB_IF |
SND_SOC_DAIFMT_CBM_CFM ) ;
if ( err < 0 ) {
printk ( KERN_ERR " can't set cpu DAI configuration \n " ) ;
return err ;
}
/* Set the codec system clock for DAC and ADC */
err =
snd_soc_dai_set_sysclk ( codec_dai , 0 , CODEC_CLOCK , SND_SOC_CLOCK_IN ) ;
if ( err < 0 ) {
printk ( KERN_ERR " can't set codec system clock \n " ) ;
return err ;
}
return err ;
}
static struct snd_soc_ops osk_ops = {
. startup = osk_startup ,
. hw_params = osk_hw_params ,
. shutdown = osk_shutdown ,
} ;
static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets [ ] = {
SND_SOC_DAPM_HP ( " Headphone Jack " , NULL ) ,
SND_SOC_DAPM_LINE ( " Line In " , NULL ) ,
SND_SOC_DAPM_MIC ( " Mic Jack " , NULL ) ,
} ;
static const struct snd_soc_dapm_route audio_map [ ] = {
{ " Headphone Jack " , NULL , " LHPOUT " } ,
{ " Headphone Jack " , NULL , " RHPOUT " } ,
{ " LLINEIN " , NULL , " Line In " } ,
{ " RLINEIN " , NULL , " Line In " } ,
{ " MICIN " , NULL , " Mic Jack " } ,
} ;
static int osk_tlv320aic23_init ( struct snd_soc_codec * codec )
{
/* Add osk5912 specific widgets */
snd_soc_dapm_new_controls ( codec , tlv320aic23_dapm_widgets ,
ARRAY_SIZE ( tlv320aic23_dapm_widgets ) ) ;
/* Set up osk5912 specific audio path audio_map */
snd_soc_dapm_add_routes ( codec , audio_map , ARRAY_SIZE ( audio_map ) ) ;
snd_soc_dapm_enable_pin ( codec , " Headphone Jack " ) ;
snd_soc_dapm_enable_pin ( codec , " Line In " ) ;
snd_soc_dapm_enable_pin ( codec , " Mic Jack " ) ;
snd_soc_dapm_sync ( codec ) ;
return 0 ;
}
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link osk_dai = {
. name = " TLV320AIC23 " ,
. stream_name = " AIC23 " ,
. cpu_dai = & omap_mcbsp_dai [ 0 ] ,
. codec_dai = & tlv320aic23_dai ,
. init = osk_tlv320aic23_init ,
. ops = & osk_ops ,
} ;
/* Audio machine driver */
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static struct snd_soc_card snd_soc_card_osk = {
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. name = " OSK5912 " ,
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. platform = & omap_soc_platform ,
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. dai_link = & osk_dai ,
. num_links = 1 ,
} ;
/* Audio subsystem */
static struct snd_soc_device osk_snd_devdata = {
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. card = & snd_soc_card_osk ,
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. codec_dev = & soc_codec_dev_tlv320aic23 ,
} ;
static struct platform_device * osk_snd_device ;
static int __init osk_soc_init ( void )
{
int err ;
u32 curRate ;
struct device * dev ;
if ( ! ( machine_is_omap_osk ( ) ) )
return - ENODEV ;
osk_snd_device = platform_device_alloc ( " soc-audio " , - 1 ) ;
if ( ! osk_snd_device )
return - ENOMEM ;
platform_set_drvdata ( osk_snd_device , & osk_snd_devdata ) ;
osk_snd_devdata . dev = & osk_snd_device - > dev ;
* ( unsigned int * ) osk_dai . cpu_dai - > private_data = 0 ; /* McBSP1 */
err = platform_device_add ( osk_snd_device ) ;
if ( err )
goto err1 ;
dev = & osk_snd_device - > dev ;
tlv320aic23_mclk = clk_get ( dev , " mclk " ) ;
if ( IS_ERR ( tlv320aic23_mclk ) ) {
printk ( KERN_ERR " Could not get mclk clock \n " ) ;
return - ENODEV ;
}
if ( clk_get_usecount ( tlv320aic23_mclk ) > 0 ) {
/* MCLK is already in use */
printk ( KERN_WARNING
" MCLK in use at %d Hz. We change it to %d Hz \n " ,
( uint ) clk_get_rate ( tlv320aic23_mclk ) , CODEC_CLOCK ) ;
}
/*
* Configure 12 MHz output on MCLK .
*/
curRate = ( uint ) clk_get_rate ( tlv320aic23_mclk ) ;
if ( curRate ! = CODEC_CLOCK ) {
if ( clk_set_rate ( tlv320aic23_mclk , CODEC_CLOCK ) ) {
printk ( KERN_ERR " Cannot set MCLK for AIC23 CODEC \n " ) ;
err = - ECANCELED ;
goto err1 ;
}
}
printk ( KERN_INFO " MCLK = %d [%d], usecount = %d \n " ,
( uint ) clk_get_rate ( tlv320aic23_mclk ) , CODEC_CLOCK ,
clk_get_usecount ( tlv320aic23_mclk ) ) ;
return 0 ;
err1 :
clk_put ( tlv320aic23_mclk ) ;
platform_device_del ( osk_snd_device ) ;
platform_device_put ( osk_snd_device ) ;
return err ;
}
static void __exit osk_soc_exit ( void )
{
platform_device_unregister ( osk_snd_device ) ;
}
module_init ( osk_soc_init ) ;
module_exit ( osk_soc_exit ) ;
MODULE_AUTHOR ( " Arun KS <arunks@mistralsolutions.com> " ) ;
MODULE_DESCRIPTION ( " ALSA SoC OSK 5912 " ) ;
MODULE_LICENSE ( " GPL " ) ;