📄 hwctxt.cpp
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DWORD Bits = dwDCSR & (DMA_DONEA|DMA_DONEB|DMA_BIU);
switch (Bits)
{
case 0:
case DMA_BIU:
// No done bits set- must not be my interrupt
return 0;
case DMA_DONEA|DMA_DONEB|DMA_BIU:
// Load B, then A
BytesTransferred = TransferInputBuffer(IN_BUFFER_B);
// fall through
case DMA_DONEA: // This should never happen!
case DMA_DONEA|DMA_BIU:
// Load A
BytesTransferred += TransferInputBuffer(IN_BUFFER_A);
break;
case DMA_DONEA|DMA_DONEB:
// Load A, then B
BytesTransferred = TransferInputBuffer(IN_BUFFER_A);
#if 0 //DMA_FLAG
BytesTransferred += TransferInputBuffer(IN_BUFFER_B);
break;
#endif
// fall through
case DMA_DONEB|DMA_BIU: // This should never happen!
case DMA_DONEB:
// Load B
BytesTransferred += TransferInputBuffer(IN_BUFFER_B);
break;
}
// If it was our interrupt, but we weren't able to transfer any bytes
// (e.g. no empty buffers ready to be filled)
// Then stop the input DMA
if (BytesTransferred==0)
{
StopInputDMA();
}
return BytesTransferred;
}
void HardwareContext::InterruptThread()
{
ULONG InputTransferred, OutputTransferred;
BOOL dmaInterruptSource = 0;
// Fast way to access embedded pointers in wave headers in other processes.
SetProcPermissions((DWORD)-1);
while(TRUE)
{
WaitForSingleObject(m_hAudioInterrupt, INFINITE);
AC97MSG(1,(TEXT("0x%x\n"),s2440INT->rINTMSK));
AC97MSG(1,(TEXT("start\n")));
dmaInterruptSource = 0;
//----- 1. Grab the lock -----
Lock();
__try
{
AC97MSG(1,(TEXT("try\n")));
//----- 3. Determine the interrupt source (input DMA operation or output DMA operation?) -----
//----- NOTE: Often, platforms use two separate DMA channels for input/output operations but
// have the OAL return SYSINTR_AUDIO as the interrupt source. If this is the case,
// then the interrupt source (input or output DMA channel) must be determined in
// this step.
// charlie, determine the interrupt source
// s2440INT->rSRCPND
if( s2440INT->rINTMSK & BIT_DMA1 ){
dmaInterruptSource |= DMA_CH_OUT; // Output DMA is supported...
}
if( s2440INT->rINTMSK & BIT_DMA2 ){
dmaInterruptSource |= DMA_CH_MIC; // Input DMA is supported...
}
// For determine the interrupt source
//----- 2. Acknowledge the DMA interrupt -----
InterruptDone(m_IntrAudio);
if ( m_Dx != D0 ) continue;
//----- 4. Handle any interrupts on the input source -----
// NOTE: The InterruptDone() call below automatically clears the interrupt.
// if((m_InputDMARunning) && (dmaInterruptSource == DMA_CH_MIC))
if((dmaInterruptSource == DMA_CH_MIC))
{
//----- Determine which buffer just completed the DMA transfer -----
if(m_InputDMAStatus & DMA_BIU)
{
m_InputDMAStatus &= ~DMA_STRTB; // Buffer B just completed...
m_InputDMAStatus |= DMA_DONEB;
m_InputDMAStatus &= ~DMA_BIU; // Buffer A is in use
#if DMA_FLAG
SELECT_AUDIO_DMA_INPUT_BUFFER_B();
#else
SELECT_AUDIO_DMA_INPUT_BUFFER_A();
#endif
AC97MSG(1,(TEXT("1\n")));
}else
{
m_InputDMAStatus &= ~DMA_STRTA; // Buffer A just completed...
m_InputDMAStatus |= DMA_DONEA;
m_InputDMAStatus |= DMA_BIU; // Buffer B is in use
#if DMA_FLAG
SELECT_AUDIO_DMA_INPUT_BUFFER_A();
#else
SELECT_AUDIO_DMA_INPUT_BUFFER_B();
#endif
AC97MSG(1,(TEXT("2\n")));
}
#if !DMA_FLAG
//----- 5. Schedule the next DMA transfer -----
AUDIO_IN_DMA_ENABLE();
#endif
//----- 6. Retrieve the next chunk of recorded data from the non-playing buffer -----
InputTransferred = TransferInputBuffers(m_InputDMAStatus);
}
//----- 7. Handle any interrupts on the output source -----
// NOTE: The InterruptDone() call below automatically clears the interrupt.
// if((m_OutputDMARunning) && (dmaInterruptSource == DMA_CH_OUT))
// if((dmaInterruptSource == DMA_CH_OUT))
else
{
//----- Determine which buffer just completed the DMA transfer -----
if(m_OutputDMAStatus & DMA_BIU)
{
//RETAILMSG(DMA_CHK,(_T("BB\r\n")));
m_OutputDMAStatus &= ~DMA_STRTB; // Buffer A just completed...
m_OutputDMAStatus |= DMA_DONEB;
m_OutputDMAStatus &= ~DMA_BIU; // Buffer B is in use
delay_count = 0;
while((v_pDMAregs->rDSTAT1&0xfffff)==0){
RETAILMSG(1,(_T("3")));
#if WAIT_DMA_END
Sleep(1);
#else
if( delay_count++ > DELAY_COUNT ) break;
#endif
}
#if DMA_FLAG
SELECT_AUDIO_DMA_OUTPUT_BUFFER_B(); // charlie. B => A
#else
SELECT_AUDIO_DMA_OUTPUT_BUFFER_A(); // charlie. B => A
#endif
}else
{
//RETAILMSG(DMA_CHK,(_T("AA\r\n")));
m_OutputDMAStatus &= ~DMA_STRTA; // Buffer B just completed...
m_OutputDMAStatus |= DMA_DONEA;
m_OutputDMAStatus |= DMA_BIU; // Buffer A is in use
delay_count = 0;
while((v_pDMAregs->rDSTAT1&0xfffff)==0)
{
RETAILMSG(1,(_T("4")));
#if WAIT_DMA_END
Sleep(1);
#else
if( delay_count++ > DELAY_COUNT ) break;
#endif
}
#if DMA_FLAG
SELECT_AUDIO_DMA_OUTPUT_BUFFER_A(); // charlie. B => A
#else
SELECT_AUDIO_DMA_OUTPUT_BUFFER_B(); // charlie. B => A
#endif
}
#if !DMA_FLAG
//----- 8. Schedule the next DMA transfer -----
AUDIO_OUT_DMA_ENABLE();
#endif
//----- 9. Fill the non-playing buffer with the next chunk of audio data to play -----
OutputTransferred = TransferOutputBuffers(m_OutputDMAStatus);
}
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
DEBUGMSG(ZONE_ERROR, (TEXT("WAVDEV2.DLL:InterruptThread() - EXCEPTION: %d"), GetExceptionCode()));
}
//----- 10. Give up the lock -----
Unlock();
}
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Function: AudioMute()
Description: Mutes/unmutes the specified audio channel.
Notes: If both audio channels are MUTED, then the chip
is powered down to conserve battery life.
Alternatively, if either audio channel is unMUTED,
the chip is powered up.
Returns: Boolean indicating success
-------------------------------------------------------------------*/
BOOL HardwareContext::AudioMute(DWORD channel, BOOL bMute)
{
static DWORD dwActiveChannel = 0;
USHORT volume;
//
// Turn off/on mute bit in volume control register.
//
if( (channel & DMA_CH_OUT ) && !m_OutputDMARunning ) // 030711
{
if(bMute)
{
volume = ReadCodecRegister(AC97_HEADPHONE_VOL);
WriteCodecRegister(AC97_HEADPHONE_VOL, volume | 0x8000);
}
else
{
volume = ReadCodecRegister(AC97_HEADPHONE_VOL);
WriteCodecRegister(AC97_HEADPHONE_VOL, volume & ~0x8000);
}
}
if( (channel & DMA_CH_MIC ) && !m_InputDMARunning )
{
if(bMute)
{
volume = ReadCodecRegister(AC97_MIC_VOL);
WriteCodecRegister(AC97_MIC_VOL, volume | 0x8000);
}
else
{
volume = ReadCodecRegister(AC97_MIC_VOL);
WriteCodecRegister(AC97_MIC_VOL, volume & ~0x8000);
}
}
return TRUE;
}
void CallInterruptThread(HardwareContext *pHWContext)
{
pHWContext->InterruptThread();
}
DWORD
HardwareContext::Open(
void
)
{
DWORD mmErr = MMSYSERR_NOERROR;
// Don't allow play when not on, if there is a power constraint upon us.
if ( D0 != m_Dx )
{
// Tell the Power Manager we need to power up.
// If there is a power constraint then fail.
DWORD dwErr = DevicePowerNotify(_T("WAV1:"), D0, POWER_NAME);
if ( ERROR_SUCCESS != dwErr ) {
RETAILMSG(1, (TEXT("AC97::Open:DevicePowerNotify ERROR: %u\r\n"), dwErr ));
mmErr = MMSYSERR_ERROR;
}
}
return mmErr;
}
DWORD
HardwareContext::Close(
void
)
{
DWORD mmErr = MMSYSERR_NOERROR;
/*
DWORD dwErr;
// we are done so inform Power Manager to power us down, 030711
// dwErr = DevicePowerNotify(_T("WAV1:"), (_CEDEVICE_POWER_STATE)D4, POWER_NAME);
if ( ERROR_SUCCESS != dwErr ) {
RETAILMSG(1, (TEXT("AC97::Close:DevicePowerNofify ERROR: %u\r\n"), dwErr ));
mmErr = MMSYSERR_ERROR;
}
*/
return mmErr;
}
BOOL
HardwareContext::IOControl(
DWORD dwOpenData,
DWORD dwCode,
PBYTE pBufIn,
DWORD dwLenIn,
PBYTE pBufOut,
DWORD dwLenOut,
PDWORD pdwActualOut)
{
DWORD dwErr = ERROR_SUCCESS;
BOOL bRc = TRUE;
UNREFERENCED_PARAMETER(dwOpenData);
switch (dwCode) {
//
// Power Management
//
case IOCTL_POWER_CAPABILITIES:
{
PPOWER_CAPABILITIES ppc;
RETAILMSG(1,(_T("IOCTL_POWER_CAPABILITIES++\r\n")));
if ( !pdwActualOut || !pBufOut || (dwLenOut < sizeof(POWER_CAPABILITIES)) ) {
bRc = FALSE;
dwErr = ERROR_INVALID_PARAMETER;
break;
}
ppc = (PPOWER_CAPABILITIES)pBufOut;
memset(ppc, 0, sizeof(POWER_CAPABILITIES));
// support D0, D4
ppc->DeviceDx = 0x11;
// no wake
// no inrush
// Report our nominal power consumption in uAmps rather than mWatts.
ppc->Flags = POWER_CAP_PREFIX_MICRO | POWER_CAP_UNIT_AMPS;
// REVIEW: Do we enable all these for normal playback?
// D0: SPI + I2S + CODEC (Playback) + Headphone=
// 0.5 mA + 0.5 mA + (23 mW, into BUGBUG ohms ) + (30 mW, into 32 ohms)
// 500 uA + 500 uA + 23000 uA + 32000 uA
ppc->Power[D0] = 56000;
*pdwActualOut = sizeof(POWER_CAPABILITIES);
RETAILMSG(1,(_T("IOCTL_POWER_CAPABILITIES--\r\n")));
} break;
case IOCTL_POWER_SET:
bRc = TRUE;
break;
/*
{
CEDEVICE_POWER_STATE NewDx;
RETAILMSG(1,(_T("IOCTL_POWER_SET++\r\n")));
if ( !pdwActualOut || !pBufOut || (dwLenOut < sizeof(CEDEVICE_POWER_STATE)) ) {
bRc = FALSE;
dwErr = ERROR_INVALID_PARAMETER;
break;
}
NewDx = *(PCEDEVICE_POWER_STATE)pBufOut;
if ( VALID_DX(NewDx) ) {
// grab the CS since the normal Xxx_PowerXxx can not.
Lock();
switch ( NewDx ) {
case D0:
if (m_Dx != D0) {
PowerUp();
m_Dx = D0;
}
break;
default:
if (m_Dx != (_CEDEVICE_POWER_STATE)D4) {
PowerDown();
m_Dx = (_CEDEVICE_POWER_STATE)D4;
}
break;
}
// return our state
*(PCEDEVICE_POWER_STATE)pBufOut = m_Dx;
RETAILMSG(1, (TEXT("AC97AUDIO: IOCTL_POWER_SET: D%u => D%u \r\n"), NewDx, m_Dx));
Unlock();
*pdwActualOut = sizeof(CEDEVICE_POWER_STATE);
} else {
bRc = FALSE;
dwErr = ERROR_INVALID_PARAMETER;
}
RETAILMSG(1,(_T("IOCTL_POWER_SET--\r\n")));
} break;
*/
case IOCTL_POWER_GET:
RETAILMSG(1,(_T("IOCTL_POWER_GET++\r\n")));
if ( !pdwActualOut || !pBufOut || (dwLenOut < sizeof(CEDEVICE_POWER_STATE)) ) {
bRc = FALSE;
dwErr = ERROR_INVALID_PARAMETER;
break;
}
*(PCEDEVICE_POWER_STATE)pBufOut = m_Dx;
RETAILMSG(1, (TEXT("AC97AUDIO: IOCTL_POWER_GET: D%u \r\n"), m_Dx));
*pdwActualOut = sizeof(CEDEVICE_POWER_STATE);
RETAILMSG(1,(_T("IOCTL_POWER_GET++\r\n")));
break;
default:
bRc = FALSE;
dwErr = ERROR_INVALID_FUNCTION;
DEBUGMSG (ZONE_FUNCTION, (TEXT(" Unsupported ioctl 0x%X\r\n"), dwCode));
break;
}
if ( !bRc ) {
SetLastError(dwErr);
}
return(bRc);
}
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