AppleBurgundyAudio.cpp   [plain text]


/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
 *
 * Hardware independent (relatively) code for the Burgundy Controller
 *
 * HISTORY
 *
 *
 */

#include "AudioHardwareCommon.h"
#include "AudioHardwareConstants.h"
#include "AudioHardwareUtilities.h"
#include "AudioHardwareDetect.h"
#include "AudioHardwareOutput.h"
#include "AudioHardwareInput.h"
#include "AudioHardwareMux.h"
#include "AudioHardwarePower.h"

#include "AppleBurgundyAudio.h"
#include "burgundy_hw.h"

#include "AppleDBDMAAudioDMAEngine.h"

/*
 * Prototyes for the "very private methods" at the end of this
 * file. They provide access to the burgundy registers:
 */
static void Burgundy_writeSoundControlReg( volatile UInt8*, int);
static int  Burgundy_readCodecSenseLines( volatile UInt8*);
static int  Burgundy_readCodecReg( volatile UInt8*, int);
static void Burgundy_writeCodecReg( volatile UInt8*, int, int);

/* =============================================================
 * VERY Private Methods used to access to the burgundy registers
 * ============================================================= */

static void
Burgundy_writeCodecReg( volatile UInt8 *ioBaseBurgundy, int regInfo, int value )
{
  u_int32_t		regBits;
  u_int32_t		regValue;
  u_int32_t		i;
  volatile u_int32_t	CodecControlReg;

  struct _reg
  {
      UInt8	unused0;
      UInt8  size;
      UInt8  addr;
      UInt8  offset;
  } *reg = (struct _reg *)&regInfo;


  regBits =   (kCodecCtlReg_Write | kCodecCtlReg_Reset)
            | ((u_int32_t) reg->addr                    * kCodecCtlReg_Addr_Bit)
            | ((u_int32_t)(reg->size + reg->offset - 1) * kCodecCtlReg_LastByte_Bit);

  for ( i=0; i < reg->size; i++ )
  {
      regValue = regBits | ((u_int32_t)(reg->offset + i) * kCodecCtlReg_CurrentByte_Bit) | (value & 0xFF);
      OSWriteLittleInt32(ioBaseBurgundy, kCodecCtlReg, regValue );
      eieio();


      DEBUG2_IOLOG( "PPCSound(burgundy): CodecWrite = %08x\n\r", regValue );

      value >>= 8;

      regBits &= ~kCodecCtlReg_Reset;

      do
      {
          CodecControlReg =  OSReadLittleInt32( ioBaseBurgundy, kCodecCtlReg  );
          eieio();
      }
      while ( CodecControlReg & kCodecCtlReg_Busy );
  }
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//  This function is used to read any Burgundy CODEC register.  The routine also
//  updates member variables to indicate the current state of the configuration
//  pins.  To update the configuration pin status, issue this function with any 
//  target register and then access the configuration pin status.  Burgundy pipelining 
//  is NOT functional so it is necessary to operate two parallel state machines 
//  to handle the codec control and status transactions when reading a Burgundy 
//  codec register.  NOTE:  The transaction level mechanism used under MacOS 9
//  to retry the register access if the current register access is preempted by
//  another register access from interrupt level has not been ported to this
//  member function.  Any register access that is preempted by another register
//  access will result in erroneous data.  A blocking mechanism should be implemented
//  here to prevent this situation.  Then this note should be removed...


static int Burgundy_readCodecReg( volatile UInt8 *ioBaseBurgundy, int regInfo )
{
   u_int32_t		regBits;
  u_int32_t		regValue = 0;
  u_int32_t		i,j;
  int			value;
  u_int32_t		byteCounter;
  u_int32_t		currentCounter;
  volatile u_int32_t	CodecControlReg;
  volatile u_int32_t	CodecStatusReg;


  struct _reg
  {
      UInt8	unused0;
      UInt8  size;
      UInt8  addr;
      UInt8  offset;
  } *reg = (struct _reg *)&regInfo;

  value   = 0;

  regBits =   (kCodecCtlReg_Reset)
            | ((u_int32_t) reg->addr                    * kCodecCtlReg_Addr_Bit)
            | ((u_int32_t)(reg->size + reg->offset - 1) * kCodecCtlReg_LastByte_Bit);

  CodecStatusReg =  OSReadLittleInt32( ioBaseBurgundy, kCodecStatusReg  );
  eieio();
  byteCounter = ((CodecStatusReg & kCodecStatusReg_ByteCounter_Mask) / kCodecStatusReg_ByteCounter_Bit + 1) & 0x03;

  for ( i=0; i < reg->size; i++ )
  {
      regValue = regBits | ((u_int32_t)(reg->offset + i) * kCodecCtlReg_CurrentByte_Bit);
      OSWriteLittleInt32(ioBaseBurgundy, kCodecCtlReg, regValue );
      eieio();
      regBits &= ~kCodecCtlReg_Reset;

      do
      {
          CodecControlReg =  OSReadLittleInt32( ioBaseBurgundy, kCodecCtlReg  );
          eieio();
      }
      while ( CodecControlReg & kCodecCtlReg_Busy );

      j=0;
      do
      {
          CodecStatusReg =  OSReadLittleInt32( ioBaseBurgundy, kCodecStatusReg  );
          eieio();
          currentCounter = ((CodecStatusReg & kCodecStatusReg_ByteCounter_Mask) / kCodecStatusReg_ByteCounter_Bit) & 0x03;
      }
      while ( (byteCounter != currentCounter) && (j++ < 1000));

      byteCounter++;

      IODelay(10);
      CodecStatusReg =  OSReadLittleInt32( ioBaseBurgundy, kCodecStatusReg  );

      value |= ((CodecStatusReg & kCodecStatusReg_Data_Mask) / kCodecStatusReg_Data_Bit) << 8*i;
  }


    // DEBUG2_IOLOG( "PPCSound(burgundy): CodecRead = %08x %08x\n\r", regValue, value );

  return value;
}

static int Burgundy_readCodecSenseLines( volatile UInt8 *ioBaseBurgundy )
{
    return ((OSReadLittleInt32( ioBaseBurgundy, kCodecStatusReg  ) / kCodecStatusReg_Sense_Bit) & kCodecStatusReg_Sense_Mask);
}


static void Burgundy_writeSoundControlReg( volatile UInt8 *ioBaseBurgundy, int value )
{

  DEBUG2_IOLOG( "PPCSound(burgundy): SoundControlReg = %08x\n", value);
  OSWriteLittleInt32( ioBaseBurgundy, kSoundCtlReg, value );
  eieio();
}



#define super AppleOnboardAudio

OSDefineMetaClassAndStructors( AppleBurgundyAudio, AppleOnboardAudio )


/* ==============
 * Public Methods
 * ============== */
//#define DEBUGMODE 
bool AppleBurgundyAudio::init(OSDictionary * properties)
{
    DEBUG_IOLOG("+ AppleBurgundyAudio::init\n");
    if (!super::init(properties)) 
        return false;

    mVolLeft = 0;
    mVolRight = 0;
    mIsMute = false;
    mLogicalInput = 0;
    mVolumeMuteIsActive = false;
    mMuxMix = 0;
    
    DEBUG_IOLOG("- AppleBurgundyAudio::init\n");
    return true;    
}

void AppleBurgundyAudio::free() {
    DEBUG_IOLOG("+ AppleBurgundyAudio::free\n");
    super::free();
    DEBUG_IOLOG("- AppleBurgundyAudio::free\n");
}

IOService* AppleBurgundyAudio::probe(IOService* provider, SInt32* score) {

    IORegistryEntry *sound = 0;
    IORegistryEntry *perch = 0;
    IOService *result = 0;
    

    // We CAN fail the type check:
    super::probe(provider, score);
    *score = kIODefaultProbeScore;
        //we may be on a Beige G3
    perch = IORegistryEntry::fromPath("/perch", gIODTPlane);
    
    if(perch) {
        //there is a perch we are on a beige G3
        OSData *s = NULL;

        s = OSDynamicCast(OSData, perch->getProperty("compatible"));

        if (s) {
            if(s->isEqualTo("burgundy", sizeof("burgundy")-1) || 
                (s->isEqualTo("DVD-Video and Audio/Video", sizeof("DVD-Video and Audio/Video")-1)) ||
                (s->isEqualTo("bordeaux", sizeof("bordeaux")-1))) {
             
                    *score = *score+2;
                    result = this;
                    goto BAIL;
            }    
                
        }
    }
    
        //we are on a new world : the registry is assumed to be fixed
    sound = provider->childFromPath("sound", gIODTPlane);
         
    if(sound) {
        OSData *tmpData;
        
        tmpData = OSDynamicCast(OSData, sound->getProperty(kModelPropName));
        if(tmpData) {
            if(tmpData->isEqualTo(kBurgundyModelName, sizeof(kBurgundyModelName) -1) ) {
                *score = *score+1;
                result = this;
                goto BAIL;
            } 
        }  
    } 

BAIL:
    DEBUG_IOLOG("- AppleBurgundyAudio::probe\n");
    return (result);
}

bool AppleBurgundyAudio::initHardware(IOService* provider)
{
    // Gets the base for the burgundy registers:
    AbsoluteTime		timerInterval;
    bool myreturn = true;

    DEBUG_IOLOG("+ AppleBurgundyAudio::initHardware\n");
    
    super::initHardware(provider);

    gCanPollSatus = true;
    checkStatus(true);    
    flushAudioControls();
        
    nanoseconds_to_absolutetime(NSEC_PER_SEC, &timerInterval);
    addTimerEvent(this, &AppleBurgundyAudio::timerCallback, timerInterval);
    
    duringInitialization = false;
    
    DEBUG_IOLOG("- AppleBurgundyAudio::initHardware\n");
    return myreturn;
}

void AppleBurgundyAudio::setDeviceDetectionActive(){
    gCanPollSatus = true;
}
    
void AppleBurgundyAudio::setDeviceDetectionInActive(){
    gCanPollSatus = false;
}


void AppleBurgundyAudio::timerCallback(OSObject *target, IOAudioDevice *device)
{
    AppleBurgundyAudio *burgundy;

    burgundy = OSDynamicCast(AppleBurgundyAudio, target);
    if (burgundy) 
        burgundy->checkStatus(false);
}




// --------------------------------------------------------------------------
// Method: checkStatusRegister
//
// Purpose:
//        if the argument is true mutes the internal speaker, otherwise
//        it "unmutes" it.
void AppleBurgundyAudio::checkStatus(bool force)
{
    UInt32 tempInSense, i;
    AudioHardwareDetect *theDetect;
    UInt32 mextdev;
    
    if(false == gCanPollSatus)
        return;
    mextdev = 0;
    
    tempInSense = sndHWGetInSenseBits();
    
    if( (curInsense != tempInSense) || force) {
        curInsense = tempInSense;
        AudioDetects = super::getDetectArray();
        if(AudioDetects) {
            for(i = 0; i < AudioDetects->getCount(); i++) {
                theDetect = OSDynamicCast(AudioHardwareDetect, AudioDetects->getObject(i));
                if (theDetect) mextdev |= theDetect->refreshDevices(curInsense);
            }
            super::setCurrentDevices(mextdev);
        }
    }
}


#pragma mark -- sndHW METHODS --

        //sndHWXXXXX functions
void AppleBurgundyAudio::sndHWInitialize(IOService *provider){
    IOMemoryMap *map;
    UInt32 idx, tmpReg;
        
    DEBUG_IOLOG("+ AppleBurgundyAudio::sndHWInitialize\n");
    map = provider->mapDeviceMemoryWithIndex(AppleDBDMAAudioDMAEngine::kDBDMADeviceIndex);
    ioBaseBurgundy = (UInt8 *)map->getVirtualAddress();
    
    if(!ioBaseBurgundy) IOLog("We have no mermory map !!!\n");
    curInsense = 0xFFFF;
        
		//update local variables for the settling time 
    for( idx = kBurgundyPhysOutputPort13-kBurgundyPhysOutputPort13; idx <= kBurgundyPhysOutputPort17-kBurgundyPhysOutputPort13; idx++ ){
		localSettlingTime[idx] = 0;  //this is an array of 5 stuff
    }	
		
		//set the IO part sub frame 0
    soundControlRegister = ( kSoundCtlReg_InSubFrame0      | \
                             kSoundCtlReg_OutSubFrame0     | \
                             kSoundCtlReg_Rate_44100        );
    Burgundy_writeSoundControlReg(ioBaseBurgundy, soundControlRegister);

    	
    	//Verify we are on a Burgundy hardware by getting the type
    	
    	
    	//Enable the programmable output
    //tmpReg = kOutputCtl0Reg_OutCtl0_High | kOutputCtl0Reg_OutCtl1_High;
    tmpReg = kOutputCtl0Reg_OutCtl1_High;
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputCtl0Reg,tmpReg);
	
   // tmpReg = kOutputCtl2Reg_OutCtl2_High | kOutputCtl2Reg_OutCtl3_High| kOutputCtl2Reg_OutCtl4_High;
  //  Burgundy_writeCodecReg( ioBaseBurgundy, kOutputCtl2Reg,tmpReg);
	
		//Muxes configuration : Mux 0 has port 1, Mux 1 has port 3, Mux 2 has port 5
    tmpReg =kBurgundyAMux_0SelPort_1;
    Burgundy_writeCodecReg( ioBaseBurgundy, kMux01Reg , tmpReg);
            
            //select input 6 for test on Yosemite
    tmpReg  = kBurgundyAMux_2SelPort_5;
    Burgundy_writeCodecReg( ioBaseBurgundy, kMux2Reg , kMux2Reg_Mux2L_SelectPort6L|kMux2Reg_Mux2R_SelectPort6R);
	
    	// configure the mixers : mixer0 has nothing, 
    	// mixer 1 has the input builtin signal, 
		// mixer2 connect digital stream A        
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX0Reg, 0);
    mMuxMix = kBurgundyW_2_n;
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg,kBurgundyW_2_n); //this for input selection
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, kBurgundyW_A_n);
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX3Reg, 0);
 
    	//apply the default gain 0xDF to mixer normalization
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ0LReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ0RReg, kMXEQ_Default_Gain );    
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ1LReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ1RReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ2LReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ2RReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ3LReg, kMXEQ_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kMXEQ3RReg, kMXEQ_Default_Gain );

    	// configure the ouput stream selection 
        // OS_O listens to mixer 2, OS_1 listens to Mixer 2 ==> this goes to output
        // OS_E listen to mixer 1 this is the input
    Burgundy_writeCodecReg( ioBaseBurgundy, kOSReg, kBurgundyOS_0_MXO_2| kBurgundyOS_1_MXO_2 | kBurgundyOS_E_MXO_1);
        
        //set the amplification OS/AP
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0LReg , 0xFF);  
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0RReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1RReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1LReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP2LReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP2RReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP3LReg , 0xFF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAP3RReg , 0xFF);

            //Mute everything
            
    Burgundy_writeCodecReg(ioBaseBurgundy, kOutputMuteReg, 0x00);
    
        //prepare the output amplification
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort14Reg, 0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort15Reg, 0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort16Reg, 0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort17Reg, 0);
    
        //set up the gains :
    	//Unity to gain and Pain 0 
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0LReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0LReg,0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0RReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0RReg,0);
    
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1LReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1LReg,0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1RReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1RReg,0);
    
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2LReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2LReg,0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2RReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2RReg,0);
    
	// Set up modem to unity
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS3LReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS3RReg,0xDF);

	// Set up PCMCIA to unity
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS4LReg,0xDF);
    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS4RReg,0xDF);

    	//Default gain for all digital input
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASALReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASARReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASBLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASBRReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASCLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASCRReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASDLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASDRReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASELReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASERReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASFLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASFRReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASGLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASGRReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASHLReg, kGAS_Default_Gain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kGASHRReg, kGAS_Default_Gain );
    
    	
		//set analog gain on input to 0
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA0Reg, 0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA1Reg, 0); 
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA2Reg, 0);
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA3Reg, 0); 

		//enable digital output driver OS_E on subframe 0 
    Burgundy_writeCodecReg( ioBaseBurgundy, kSDInReg, 0 );             
    Burgundy_writeCodecReg( ioBaseBurgundy, kSDInReg2, kBurgundyOS_EOutputEnable );
	
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWInitialize\n");
}
    
    
UInt32 	AppleBurgundyAudio::sndHWGetInSenseBits(){
    UInt32 status, inSense;
    
    inSense = 0;
        //we need to add the parrallel input part
    status = Burgundy_readCodecSenseLines(ioBaseBurgundy) & kBurgundyInSenseMask;

    if(status & kBurgundyInSense0) 
        inSense |= kBurgundyInSense3;
    if(status & kBurgundyInSense1)
        inSense |= kBurgundyInSense2;
    if(status & kBurgundyInSense2)
        inSense |= kBurgundyInSense1;
    if(status & kBurgundyInSense3) 
        inSense |= kBurgundyInSense0;

    return(inSense);
}


UInt32 	AppleBurgundyAudio::sndHWGetRegister(UInt32 regNum){
    return(CodecControlRegister[regNum]);
}

IOReturn  AppleBurgundyAudio::sndHWSetRegister(UInt32 regNum, UInt32 value){
    UInt32 result = 0;
    return(result);

}

UInt32	AppleBurgundyAudio::sndHWGetConnectedDevices(void){
    return(super::getCurrentDevices());
}

/************************** Manipulation of input and outputs ***********************/
/********(These functions are enough to implement the simple UI policy)**************/


UInt32	AppleBurgundyAudio::sndHWGetActiveOutputExclusive(void){
    UInt32 result = 0;
    return(result);
}

IOReturn   AppleBurgundyAudio::sndHWSetActiveOutputExclusive(UInt32 outputPort ){
    IOReturn result= kIOReturnSuccess;
    UInt32	physicalPort, tempOutputReg;
    UInt32 	logicalOutputPort;
    
    logicalOutputPort = outputPort;
    
    if( logicalOutputPort > kSndHWOutput5)
        return(kIOReturnError);
	
    physicalPort = GetPhysicalOutputPort(logicalOutputPort);	

    tempOutputReg = kBurgundyMuteAll;
    
    switch(physicalPort) {
        case kBurgundyPhysOutputPortNone:
            DEBUG_IOLOG(" ++ Writing Port None\n");
            break;
        case kBurgundyPhysOutputPort13:
            DEBUG_IOLOG(" ++ Writing Port 13\n");
            tempOutputReg |= ( kBurgundyMuteOffState<< kBurgundyPort13MonoMute);
            break;
        case kBurgundyPhysOutputPort14:
            DEBUG_IOLOG(" ++ Writing Port 14\n");
            tempOutputReg |= (( kBurgundyMuteOffState<< kBurgundyPort14LMute) | ( kBurgundyMuteOffState<< kBurgundyPort14RMute));
            break;
        case kBurgundyPhysOutputPort15:
            DEBUG_IOLOG(" ++ Writing Port 15\n");
            tempOutputReg |= (( kBurgundyMuteOffState<< kBurgundyPort15LMute) | ( kBurgundyMuteOffState<< kBurgundyPort15RMute));
            break;
        case kBurgundyPhysOutputPort16:
            DEBUG_IOLOG(" ++ Writing Port 16\n");
            tempOutputReg|= (( kBurgundyMuteOffState<< kBurgundyPort16LMute) | ( kBurgundyMuteOffState<< kBurgundyPort16RMute));
            break;
        case kBurgundyPhysOutputPort17:
            DEBUG_IOLOG(" ++ Writing Port 17\n");
            tempOutputReg |= ( kBurgundyMuteOffState << kBurgundyPort17MonoMute);
            break;        
    } 
    
    Burgundy_writeCodecReg(ioBaseBurgundy, kOutputMuteReg, tempOutputReg);
    return(result);
}

UInt32 	AppleBurgundyAudio::sndHWGetActiveInputExclusive(void){
    UInt32 result = mLogicalInput;
    return(result);
}

IOReturn   AppleBurgundyAudio::sndHWSetActiveInputExclusive(UInt32 input ){
    UInt32 physicalInput , curPhysicalInput, tmpReg;
    UInt8  muxToBe, curMux;
    
    DEBUG2_IOLOG(" + AppleBurgundyAudio::sndHWSetActiveInputExclusive : %lu\n", input);
    IOReturn result= kIOReturnSuccess;
    
	tmpReg = 0;
    if(mLogicalInput != input) {
        physicalInput = GetPhysicalInputPort(input );
        curPhysicalInput = GetPhysicalInputPort( mLogicalInput );
        curMux = GetInputMux(curPhysicalInput);
        muxToBe = GetInputMux(physicalInput);
          
                //first we disconnect the first input from the mixer 1;
                // - get the mux of the input
                // - putting the input analog gain to 0
                // - putting the digital gain to 0dB
                // - disconnecting the input from the mixer one
        if( 0!= curPhysicalInput) {
            switch( curMux ) {
                case kBurgundyMux0:		
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA0Reg, 0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg, 0);
                    break;
                case kBurgundyMux1:
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA1Reg, 0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg,0);
                    break;						//	fall through
                case kBurgundyMux2:
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2RReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA2Reg, 0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg, 0);
                    break;                                            //	fall through
                default:
                    break;
            }
        }
    
            // select the mux 
            // reactivate the digital gain : 
            // put the input to mixer 1
        if( physicalInput != kBurgundyPhysInputPortNone ) {
            switch( muxToBe ) {
                case kBurgundyMux0:		
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0LReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS0RReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS0RReg,0);
                    //select the mux
                    switch(physicalInput) {
                        case kBurgundyPhysInputPort1:
                            tmpReg =kBurgundyAMux_0SelPort_1;
                            break;
                        case kBurgundyPhysInputPort2:
                            tmpReg =kBurgundyAMux_0SelPort_2;
                            break;
                        case kBurgundyPhysInputPort3:
                            tmpReg =kBurgundyAMux_0SelPort_3;
                            break;
                    }
                    
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMux01Reg , tmpReg);
                        //connect the mux tp the mixer
                    mMuxMix = kBurgundyW_0_n;
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg,mMuxMix);
                    break;
                case kBurgundyMux1:
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1LReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS1RReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS1RReg,0);
                    switch(physicalInput) {
                        case kBurgundyPhysInputPort4:
                            tmpReg = kBurgundyAMux_1SelPort_4;
                            break;
                        case kBurgundyPhysInputPort5:
                            tmpReg = kBurgundyAMux_1SelPort_5;
                            break;
                    }
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMux01Reg , tmpReg);
                    mMuxMix = kBurgundyW_1_n;
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg,mMuxMix);
                    break;						
                case kBurgundyMux2:
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2LReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2LReg,0);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kGAS2RReg,0xDF);
                    Burgundy_writeCodecReg( ioBaseBurgundy, kPAS2RReg,0);
                    switch(physicalInput) {
                        case kBurgundyPhysInputPort6:
                            tmpReg = kBurgundyAMux_2SelPort_6;
                            break;
                        case kBurgundyPhysInputPort7:
                            tmpReg = kBurgundyAMux_2SelPort_7;
                            break;
                    }
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMux2Reg , tmpReg);
                    mMuxMix = kBurgundyW_2_n;
                    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg,mMuxMix);
                    break;                                            
                default:
                    break;
            }
        }                                						
        mLogicalInput = input;  // keep track of our new current active input for this system 
    }
    DEBUG_IOLOG(" - AppleBurgundyAudio::sndHWSetActiveInputExclusive");

    return(result);
}

UInt32 	AppleBurgundyAudio::sndHWGetProgOutput(){
    UInt32 result = 0, outputConfigPins;

	outputConfigPins = 0;		// just to quiet the warning in the compiler
  //  outputConfigPins = Burgundy_readCodecReg( ioBaseBurgundy, kOutputCtl0Reg);
    result |= ( outputConfigPins & kBurgundyOut_Ctrl_0State ) ? kSndHWProgOutput0 : 0;
    result |= ( outputConfigPins & kBurgundyOut_Ctrl_1State ) ? kSndHWProgOutput1 : 0;
	
   // outputConfigPins = Burgundy_readCodecReg( ioBaseBurgundy, kOutputCtl2Reg);
    result |= ( outputConfigPins & kBurgundyOut_Ctrl_2State ) ? kSndHWProgOutput2 : 0;
    result |= ( outputConfigPins & kBurgundyOut_Ctrl_3State ) ? kSndHWProgOutput3 : 0;
    result |= ( outputConfigPins & kBurgundyOut_Ctrl_4State ) ? kSndHWProgOutput4 : 0;	
    
    return(result);
}

IOReturn   AppleBurgundyAudio::sndHWSetProgOutput(UInt32 outputBits){
    IOReturn result= kIOReturnSuccess;
    UInt32 outputConfigPins;
    
    outputConfigPins = 0;
    if( outputBits & ( kSndHWProgOutput0 ) )
            outputConfigPins |= kBurgundyOut_Ctrl_0State;
    if( outputBits & ( kSndHWProgOutput1 ) )
            outputConfigPins |= kBurgundyOut_Ctrl_1State;
//    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputCtl0Reg, outputConfigPins);
	
    outputConfigPins = 0;
    if( outputBits & ( kSndHWProgOutput2 ) )
        outputConfigPins |= kBurgundyOut_Ctrl_2State;
    if( outputBits & ( kSndHWProgOutput3 ) )
        outputConfigPins |= kBurgundyOut_Ctrl_3State;
    if( outputBits & ( kSndHWProgOutput4 ) )
        outputConfigPins |= kBurgundyOut_Ctrl_4State;
  //  Burgundy_writeCodecReg( ioBaseBurgundy, kOutputCtl2Reg,outputConfigPins);
    
    return(result);
}
    
            // control function
bool AppleBurgundyAudio::sndHWGetSystemMute(void){
     return (mIsMute);
}

IOReturn  AppleBurgundyAudio::sndHWSetSystemMute(bool mutestate){
    IOReturn result= kIOReturnSuccess;
    if(mutestate != mIsMute) {
        mIsMute = mutestate;
        
        if(mutestate) {
                //we are muting. We do it by disconnecting the output from the mixer
                //we let only the OS_E stream for the sound input. Ther may be other
                //possibilities
            Burgundy_writeCodecReg( ioBaseBurgundy, kOSReg, kBurgundyOS_E_MXO_1);
        } else {
                //we reconnect everything
            Burgundy_writeCodecReg( ioBaseBurgundy, kOSReg, kBurgundyOS_0_MXO_2| kBurgundyOS_1_MXO_2 | kBurgundyOS_E_MXO_1);
        } 
    }
    return(result);
}

bool AppleBurgundyAudio::sndHWSetSystemVolume(UInt32 leftVolume, UInt32 rightVolume){
    UInt8 leftAttn, rightAttn;
    UInt8 comAttn;
    UInt32 tLeftVolume, tRightVolume;
    
    
        //mVolLeft and leftVolume between 0 and 16
    if( leftVolume != mVolLeft) 
        mVolLeft = leftVolume; 
    tLeftVolume = mVolLeft;
    if(0 == tLeftVolume) tLeftVolume = 1; //leftVolume between 1 and 16
    tLeftVolume -=1; 		    //leftVolume between 0 and 15	
    leftAttn = 15 - (UInt8) tLeftVolume; //leftAttn between 15 and 0	
    
    if( rightVolume != mVolRight) 
        mVolRight = rightVolume;
    tRightVolume = mVolRight;
    if(0 == tRightVolume) tRightVolume = 1;
    tRightVolume -=1; 
    rightAttn = 15 - (UInt8) tRightVolume; //leftAttn between 15 and 0	    
            
    if( (mVolLeft == 0) && (mVolRight == 0)) {
        mVolumeMuteIsActive = true; 
        Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0LReg , 0x00);  
        Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0RReg , 0x00);
        Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1RReg , 0x00);
        Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1LReg , 0x00);
    } else {
        //we should o it better to mute one channel only to have a good balance
        if( mVolumeMuteIsActive) {  // we do it only if we come back from noting
            mVolumeMuteIsActive = false; 
            Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0LReg , 0xFF);  
            Burgundy_writeCodecReg( ioBaseBurgundy, kGAP0RReg , 0xFF);
            Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1RReg , 0xFF);
            Burgundy_writeCodecReg( ioBaseBurgundy, kGAP1LReg , 0xFF);
        }
    }

    comAttn = rightAttn << 4 | leftAttn;
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort13Reg, comAttn & 0x0F);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort14Reg, comAttn);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort15Reg, comAttn);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort16Reg, comAttn);
    Burgundy_writeCodecReg( ioBaseBurgundy, kOutputLvlPort17Reg, comAttn & 0x0F);

    bool result = true;
    return(result);
}

IOReturn AppleBurgundyAudio::sndHWSetSystemVolume(UInt32 value){
    IOReturn result= kIOReturnSuccess;
    sndHWSetSystemVolume(value, value);
    return(result);
}

IOReturn AppleBurgundyAudio::sndHWSetSystemInputGain(UInt32 leftGain, UInt32 rightGain){
    IOReturn myReturn = kIOReturnSuccess; 
    UInt32 totGain;
    UInt8 galeft, garight;
    
    DEBUG3_IOLOG("+ AppleBurgundyAudio::sndHWSetSystemInputGain (%ld, %ld)\n", leftGain, rightGain);
    
    totGain = 0;
    galeft = (UInt8) leftGain;
    garight = (UInt8) rightGain;
    
    totGain |= galeft;
    totGain |=  (garight <<4);
        
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA0Reg,   totGain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA1Reg,   totGain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA2Reg,   totGain );
    Burgundy_writeCodecReg( ioBaseBurgundy, kVGA3Reg,   leftGain );
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWSetSystemInputGain\n");
    return(myReturn);
}


IOReturn AppleBurgundyAudio::sndHWSetPlayThrough(bool playthroughstate){
	IOReturn result= kIOReturnSuccess;
    DEBUG_IOLOG("+ AppleBurgundyAudio::sndHWSetPlayThrough\n");
    
    if(playthroughstate) 
        Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, mMuxMix | kBurgundyW_A_n);
    else 
        Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, kBurgundyW_A_n);
         
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWSetPlayThrough\n");
    return(result);
}
    
            //Power Management
IOReturn AppleBurgundyAudio::sndHWSetPowerState(IOAudioDevicePowerState theState){
    IOReturn result= kIOReturnSuccess;
    DEBUG_IOLOG("+ AppleBurgundyAudio::sndHWSetPowerState\n");
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWSetPowerState\n");
    return(result);
}

            //Identification
UInt32 	AppleBurgundyAudio::sndHWGetType( void ){
    UInt32 result;
    DEBUG_IOLOG("+ AppleBurgundyAudio::sndHWGetType\n");
    result = 0;
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWGetType\n");
    return(result);
}

UInt32	AppleBurgundyAudio::sndHWGetManufacturer( void ){
    UInt32 result, info;
    DEBUG_IOLOG("+ AppleBurgundyAudio::sndHWGetManufacturer\n");

    info = sndHWGetRegister(kBurgundyIDReg);
	
    switch (info & kBurgundySiliconVendor){
        case kBurgundyManfCrystal:
            result = kSndHWManfCrystal;
            break;
        case kBurgundyManfTI:
            result = kSndHWManfTI;
            break;
        default:
            result = kSndHWManfUnknown;
            break;
    }
    DEBUG_IOLOG("- AppleBurgundyAudio::sndHWGetManufacturer\n");
    return(result);
}

#pragma mark -- BURGUNDY SPECIFIC --
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	This routine will disconnect an input sample stream (i.e. MUX) from
//	ALL mixers.  Argument "mixer" is a bit mapped enable of the mixer
//	sources to be disconnected from an input stream as follows:
//
//		kBurgundyW_0_n		mux_0	ports 1, 2 & 3		built-in 
//		kBurgundyW_1_n		mux_1	ports 4 & 5			built-in 
//		kBurgundyW_2_n		mux_2	ports 6 & 7			built-in 
//		kBurgundyW_3_n		mux_3	port 8				telephony modem record
//		kBurgundyW_4_n		mux_4	port 9				pcmcia
//		kBurgundyW_A_n				subframe 0			built-in digital play
//		kBurgundyW_B_n				subframe 1			telephony digital play
void AppleBurgundyAudio::DisconnectMixer(UInt32 mixer) {
    UInt32	temp;

    temp = Burgundy_readCodecReg( ioBaseBurgundy, kMX0Reg);
    temp &= ~mixer;
    temp |= kBurgundyW_A_n;	
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX0Reg, temp); //playthrough path always gets digital stream
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, temp); //ext. speaker/line out is a mirror image of play path
			
    temp = Burgundy_readCodecReg( ioBaseBurgundy, kMX1Reg); //disconnect input from recording input stream
    temp &= ~mixer;
    Burgundy_writeCodecReg( ioBaseBurgundy, kMX1Reg, temp);
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
UInt32	AppleBurgundyAudio::GetPhysicalInputPort( UInt32 logicalPort )
 {
	UInt32			physicalPort;
	
	physicalPort = kBurgundyPhysInputPortIllegal;

        switch( logicalPort ){
            case kSndHWInputNone:	physicalPort = kBurgundyPhysInputPortNone;	break;
            case kSndHWInput1:		physicalPort = kBurgundyPhysInputPort1;		break;
            case kSndHWInput2:		physicalPort = kBurgundyPhysInputPort2;		break;
            case kSndHWInput3:		physicalPort = kBurgundyPhysInputPort3;		break;
            case kSndHWInput4:		physicalPort = kBurgundyPhysInputPort4;		break;
            case kSndHWInput5:		physicalPort = kBurgundyPhysInputPort5;		break;
            case kSndHWInput6:		physicalPort = kBurgundyPhysInputPort6;		break;
            case kSndHWInput7:		physicalPort = kBurgundyPhysInputPort7;		break;
            case kSndHWInput8:		physicalPort = kBurgundyPhysInputPort8;		break;
            case kSndHWInput9:		physicalPort = kBurgundyPhysInputPort9;		break;
        }
	
	return physicalPort;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
UInt32	AppleBurgundyAudio::GetPhysicalOutputPort(UInt32 logicalPort )
{
	UInt32			physicalPort;
	
	physicalPort = kBurgundyPhysOutputPortIllegal;
        
        switch( logicalPort ) {
            case kSndHWOutputNone:	physicalPort = kBurgundyPhysOutputPortNone;	break;
            case kSndHWOutput1:		physicalPort = kBurgundyPhysOutputPort14;	break;
            case kSndHWOutput2:		physicalPort = kBurgundyPhysOutputPort15;	break;
            case kSndHWOutput3:		physicalPort = kBurgundyPhysOutputPort16;	break;
            case kSndHWOutput4:		physicalPort = kBurgundyPhysOutputPort17;	break;
            case kSndHWOutput5:		physicalPort = kBurgundyPhysOutputPort13;	break;
        }
	
	return physicalPort;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Returns the port configuration so that maximum gain can be determined.
//	
//	DIGITAL ONLY:		                        9
//	ANALOG & DIGITAL:			1 2 3 4       8
//	PREAMP, ANALOG & DIGITAL:	        5 6 7
UInt32 	AppleBurgundyAudio::GetInputPortType(UInt32 inputPhysicalPort){

    UInt32 result;
	
    switch( inputPhysicalPort ) {
        case kBurgundyPhysInputPort1:		//	fallthrough
        case kBurgundyPhysInputPort2:		//	fallthrough
        case kBurgundyPhysInputPort3:		//	fallthrough
        case kBurgundyPhysInputPort4:		//	fallthrough
        case kBurgundyPhysInputPort8:
            result = kBurgundyPortType_AD;
            break;
        case kBurgundyPhysInputPort5:		//	fallthrough
        case kBurgundyPhysInputPort6:		//	fallthrough
        case kBurgundyPhysInputPort7:
            result = kBurgundyPortType_AAD;
            break;
        case kBurgundyPhysInputPort9:
            result = kBurgundyPortType_D;
            break;
        case kBurgundyPhysInputPortNone:	//	fallthrough
        default:
            result = kBurgundyPortType_NONE;
            break;
    }
	
    return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Several of the analog inputs are available as in input selection to
//	more than one mux.  This routine determines which mux is the primary
//	destination for a specific input source.  For inputs that have more
//	than one possible destination, the primary source is the lower orderd
//	destination multiplexer.
UInt8	AppleBurgundyAudio::GetInputMux(UInt32 physicalInput){
    UInt8 theMux;
	
    if( physicalInput > kSndHWInput9) {
        theMux = kBurgundyMuxNone;
        goto Exit;
    }
	
    switch( physicalInput ){
        case kBurgundyPhysInputPort1:	//	fall through (port 1, 2 & 3 share the same mux)
        case kBurgundyPhysInputPort2:	//	fall through (port 1, 2 & 3 share the same mux)
        case kBurgundyPhysInputPort3:
            theMux = kBurgundyMux0;		
            break;
        case kBurgundyPhysInputPort4:	//	fall through (port 4 & 5 share the same mux)
        case kBurgundyPhysInputPort5:
            theMux = kBurgundyMux1;	
            break;
        case kBurgundyPhysInputPort6:	//	fall through (port 6 & 7 share the same mux)
        case kBurgundyPhysInputPort7:
            theMux = kBurgundyMux2;	
            break;
        case kBurgundyPhysInputPort8:
            theMux = kBurgundyMux3;	
            break;
        case kBurgundyPhysInputPort9:
            theMux = kBurgundyMux4;	
            break;
        case kBurgundyPhysInputPortNone:
            theMux = kBurgundyMuxNone;	
            break;
    }
Exit:
    return theMux;
}

void	AppleBurgundyAudio::ReleaseMux(UInt8 mux){
    	//__SndHWSetPan( system, kMinSoftwareGain, kMinSoftwareGain );
    UInt32 temp;

	temp = 0;
    switch( mux ){
        case kBurgundyMux0:
            temp = kBurgundyW_0_n;	
            break;			//	prepare to disconnect the mux 0 from mixer 'n' connection
        case kBurgundyMux1:
            temp = kBurgundyW_1_n;	
            break;			//	prepare to disconnect the mux 1 from mixer 'n' connection
        case kBurgundyMux2:
            temp = kBurgundyW_2_n;	
            break;			//	prepare to disconnect the mux 2 from mixer 'n' connection
        case kBurgundyMux4:
            temp = kBurgundyW_4_n;	
            break;			//	prepare to disconnect the mux 4 from mixer 'n' connection
        }
        
            //	disconnect the mux to mixer connection
    DisconnectMixer( temp );										//
//	gGlobals->muxReservation[mux] = kSndHWInputNone;

}

void	AppleBurgundyAudio::ReserveMux(UInt8 mux, UInt32 physicalInput){

}

IOReturn AppleBurgundyAudio::setModemSound(bool state) {
    IOReturn myReturn = kIOReturnSuccess;

	IOLog ("+ AppleBurgundyAudio::setModemSound(%d)\n", state);
	// make sure that the imic is not enabled when playthrough is turned on -- there will be no FEEDBACK!!!

	if(TRUE == state) {
		gIsModemSoundActive = true;
		Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, kBurgundyW_3_n | kBurgundyW_A_n );
	} else {
		Burgundy_writeCodecReg( ioBaseBurgundy, kMX2Reg, kBurgundyW_A_n);
		super::setModemSound(state);
	}

	IOLog ("- AppleBurgundyAudio::setModemSound(%d)\n", state);
    return(myReturn);
}