audio.c

powerpc下audio.rar驱动,支持tornado2.2

/****************************************************************************
    Shanghai Pallas Digital Tech. Ltd,  (C) 2002 , All rights are reserved

    File : audioctrl.c

    控制音频输出

****************************************************************************/

#include <vxworks.h>
#include "base.h"

#if ( HARDWARE_VERSION == 2 )
#include "ads852.h"
#include "m852reg.h"
#include "m852mask.h"
#else
#include "ads8260.h"
#include "m8260reg.h"
#include "m8260mask.h"
#endif


#include "audioctrl.h"


/*audio control patter defined here*/
#if ( HARDWARE_VERSION == 2 )
U32  audio_ctrl_pattern[] = {
                             0x00 ,  0x04 ,  0x05 ,  0x01 ,  0x01 ,  
                             0x01 ,  0x01 ,  0x01 ,  0x01 ,  0x01 ,
			     0x01 ,  0x01 ,  0x01 ,  0x01 ,  0x01 ,
                             0x01 ,  0x06 ,
                            };  
U8 audio_status ;
#elif ( HARDWARE_VERSION == 8 )
U32  audio_ctrl_pattern[] = {
                             0x00 ,  0x01 ,  0x02 ,  0x03 ,  
                             0x04 ,  0x05 ,  0x06 ,  0x07 , 
                             0x07 ,  0x08 ,  0x08 ,  0x08 ,
                             0x08 ,  0x08 ,  0x08 ,  0x08 ,
                             0x08 ,                                    //for playback
                            };
#elif ( HARDWARE_VERSION == 16 )
U32  audio_ctrl_pattern[] = {
                             0x00 ,  0x01 ,  0x02 ,  0x03 ,  0x04 ,  
                             0x05 ,  0x06 ,  0x07 ,  0x08 ,  0x09 ,
                             0x0a ,  0x0b ,  0x0c ,  0x0d ,  0x0e ,
                             0x0f ,  0x10 ,
                            };    
#endif
//   Function : init_audio_ctrl
//Description : 
void  init_audio_ctrl   ( void     ) 
{
#if ( HARDWARE_VERSION == 2 )
    
 	audio_status=1;
 	*EPLD_AUDIO_CTRL_REG=audio_status;
 
#else
    U32 base = vxImmrGet();
    
    *M8260_PCODR(base) &= ~( AUIDO_ENABLE_PIN | AUDIO_CTRL_PIN ) ;
    *M8260_PCPAR(base) &= ~( AUIDO_ENABLE_PIN | AUDIO_CTRL_PIN ) ;
    *M8260_PCDIR(base) |=    AUIDO_ENABLE_PIN | AUDIO_CTRL_PIN   ;        
#endif
}

//   Function : init_audio_ctrl
//Description : 1 , enable ; 0 , disable
void  enable_audio_output( int flag ) 
{
    U32 base = vxImmrGet();
    
#if ( HARDWARE_VERSION == 2 )
    if( flag )
	audio_status &=  ~AUDIO_ENABLE_MASK ;
    else
        audio_status |=  AUDIO_ENABLE_MASK ;
    *EPLD_AUDIO_CTRL_REG=audio_status;
#else
    if( flag )
        *M8260_PCDAT(base) &= ~AUIDO_ENABLE_PIN ;
    else
        *M8260_PCDAT(base) |=  AUIDO_ENABLE_PIN ;
#endif
}

//   Function : init_audio_ctrl
//Description : 0 ... 8 ,  channel ;  9 , PLAYBACK
void  set_audio_output  ( int ch   ) 
{
    U32 base = vxImmrGet();    
    
#if ( HARDWARE_VERSION == 2 )
                
    /*clear first*/
    audio_status &= AUDIO_ENABLE_MASK ;
    if( ch == 1 )
        audio_status &= 0xfd ;
    audio_status |= (U8) audio_ctrl_pattern[ch] << 1 ;
    *EPLD_AUDIO_CTRL_REG= audio_status;
#else
    if( ch > 16 || ch < 0 )
        return ;
          
    /*clear first*/
    *M8260_PCDAT(base) &= ~AUDIO_CTRL_PIN ;
    *M8260_PCDAT(base) |= ( audio_ctrl_pattern[ ch ] << 14 );
#endif
}