aaci_dma.c

ARM9基于WINDOWSCE的BSP源代码

		{	// remove header
			int toremove = bufferedplayingblock - leftplayingblock;
			if( RemovePlayBuffer( toremove ) == 0 )
				bufferedplayingblock = leftplayingblock;
			InterruptDone( PlayDmaIntID );
		}
		else if( leftplayingblock > bufferedplayingblock )
			RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT( "AACI : Thread : error, more left %d %d\r\n") , bufferedplayingblock , leftplayingblock )); 				
	}
	RETAILMSG( (DebugMsgMask&DebugMsg_Important ), (TEXT( "AACI : DMA : leave Thread\r\n" ) ));
	return error;
}

int ReleaseAll()
{
	int error = 0;
	DMAPlayCmd = DMA_PLAY_EXIT;
	if( DmaThread )
	{
		if( DmaPlayEvent )
			SetEvent( DmaPlayEvent );
		if( WaitForSingleObject( DmaThread , 1000 ) != WAIT_OBJECT_0 )
			TerminateThread( DmaThread , -1 );
		CloseHandle( DmaThread );
	}
	DMARecordCmd = DMA_RECORD_EXIT;
	if( DmaRecordThread )
	{
		if( DmaRecordEvent )
			SetEvent( DmaRecordEvent );
		if( WaitForSingleObject( DmaRecordThread , 1000 ) != WAIT_OBJECT_0 )
			TerminateThread( DmaRecordThread , -1 );
		CloseHandle( DmaRecordThread );
	}
	if( ReleasePlayDMA() != 0 )
		error = 1;
	return error;
}

int InitAll()
{
	int error = 0;
	if( AllocPlayDMA() != 0 )
		error = 1;
	else if( InitPlayDMA() != 0 )
		error = 2;
	if( !error )
	{
		if( AllocRecordDMA() != 0 ) 			
			error =  3;
		else if( InitRecordDMA() != 0 ) 
			error = 4;
	}
	if( !error )
	{
		DmaThread  = CreateThread( NULL, 0, AudioDMAThread, NULL, 0, NULL);
		if( !DmaThread  )
			error = 5;
		else
			SetThreadPriority( DmaThread , THREAD_PRIORITY_ABOVE_NORMAL );
	}
	if( !error )
	{
		DmaRecordThread  = CreateThread( NULL, 0, AudioRecordThread , NULL, 0, NULL);
		if( !DmaRecordThread )
			error = 6;
		else
			SetThreadPriority( DmaRecordThread , THREAD_PRIORITY_ABOVE_NORMAL );		
	}
	if( error )
		RETAILMSG( (DebugMsgMask&DebugMsg_Normal), (TEXT("InitAll : %d\r\n") , error));
	
	return error;
}

static unsigned char* PlayBuffer = 0;
static unsigned int PlayBuffer_phy;

static const int TotalPlayBufferSize = 0x1000 * 10;

static int PlayBufferBlockSize = 0;

void StoreRecordBuffer()
{
	SetEvent( DmaRecordEvent );	
}

void StorePlayBuffer( char*buf , int size)
{	
	int notify = 0;
	if( DMAPlayCmd != DMA_PLAY_START )
		return ;
	if( TotalPlayBufferCnt == 0 )
	{
		RETAILMSG( (DebugMsgMask&DebugMsg_Trace) , (TEXT("AACI : DMA : first store\r\n")));
		PlayBufferBlockSize = size;
		TotalPlayBufferCnt = TotalPlayBufferSize / size ;		
	}
	
	memcpy( PlayBuffer + PlayBufferBlockSize*PlayBufferStoreIndex , buf , size );
	
	if( PlayBufferStoreIndex == PlayBufferPlayIndex )
		notify = 1;
	PlayBufferStoreIndex = (PlayBufferStoreIndex+1) % TotalPlayBufferCnt;	
	if( notify )
		SetEvent( DmaPlayEvent );
}
void GetPlayBuffer( unsigned int *buf )
{
	*buf = PlayBuffer_phy + PlayBufferPlayIndex*PlayBufferBlockSize;
	PlayBufferPlayIndex = ( PlayBufferPlayIndex+1 ) % TotalPlayBufferCnt;
}

int StartPlayDMA( unsigned int bufphy, int size ,  int* actualbuffered )
{	
	int error = 0;
	DWORD FIFOAddr = 0x20037090 , dwRet;
	START_DMA_PARAMS    StartDMAParams;
	
	StartDMAParams.ucChannelNumber = (unsigned char)PlayDMAChannelNumber;	
	StartDMAParams.pdwSourceBuffer = &bufphy;
	StartDMAParams.pdwDestBuffer = &FIFOAddr;
	StartDMAParams.dwTransferSize = size;	
	
	if ( !KernelIoControl(	HAL_IOCTL_AACI_DMA , &StartDMAParams, sizeof(StartDMAParams),
								actualbuffered, sizeof(int), &dwRet))
	{
		error = 1;
		RETAILMSG( (DebugMsgMask&DebugMsg_Important ), (TEXT("aaci : Start dma error\r\n" )));
	}
	return error;
}

int ReleasePlayDMA(void)
{
	int error = 0;
	DWORD dwRet;
	if( PlayDMAChannelNumber >= 0 && PlayDMAChannelNumber <= 7 )
	{
		FREE_DMA_PARAMS FreeDMAParams;
		FREE_DMA_RESULT FreeDMAResult;
		FreeDMAParams.ucChannelNumber = PlayDMAChannelNumber;
		if (!KernelIoControl(IOCTL_HAL_FREE_DMA_CHANNEL,
			&FreeDMAParams, sizeof(FreeDMAParams),
			&FreeDMAResult, sizeof(FreeDMAResult), &dwRet))
		{
			error = 1;
		}
	}
	if( DmaPlayEvent )
		CloseHandle( DmaPlayEvent );
	if( PlayDmaIntID )
		InterruptDisable( PlayDmaIntID );
	if( PlayBuffer )
		FreePhysMem(PlayBuffer);
	
	PlayBuffer = 0;
	return error;
}

int InitPlayDMA()
{		
	int error = 0;
	unsigned long dwRet = 0;
	
	INITIALIZE_DMA_PARAMS InitializeDMAParams;
	INITIALIZE_DMA_RESULT InitializeDMAResult;
	InitializeDMAParams.ucChannelNumber = PlayDMAChannelNumber;
	InitializeDMAParams.ucSourceWidth = TRANSFER_WIDTH_WORD; 
	InitializeDMAParams.ucDestWidth = TRANSFER_WIDTH_WORD; 
	InitializeDMAParams.ucSourceBurstSize = BURST_SIZE_64; 
	InitializeDMAParams.ucDestBurstSize = BURST_SIZE_64;
	InitializeDMAParams.fIncrementSource = TRUE;	//source - auto increment
	InitializeDMAParams.fIncrementDest = FALSE;		//dest - constant
	InitializeDMAParams.ucFlowControl = FLOW_MEM_PER_DMAC;
	
	if (!KernelIoControl(IOCTL_HAL_INITIALIZE_DMA_CHANNEL,
		&InitializeDMAParams, sizeof(InitializeDMAParams),
		&InitializeDMAResult, sizeof(InitializeDMAResult), &dwRet))
	{
		error = 1;
	}
	
	return error;
}

int AllocPlayDMA(void)
{
	int error = 0;
	unsigned long dwRet = 0;
	
	PlayBuffer = AllocPhysMem( TotalPlayBufferSize, PAGE_READWRITE, 0, 0, &PlayBuffer_phy );
    if( !PlayBuffer )
		error = 1;
	if( !error )
	{
		ALLOCATE_DMA_PARAMS AllocateDMAParams;
		ALLOCATE_DMA_RESULT AllocateDMAResult;
		AllocateDMAParams.ucSourceDevice = 0;
		AllocateDMAParams.ucDestDevice = 14;
		AllocateDMAParams.ucPreferedPriority = 0xff;    // no preference
		if (!KernelIoControl(IOCTL_HAL_ALLOCATE_DMA_CHANNEL,
			&AllocateDMAParams, sizeof(AllocateDMAParams),
			&AllocateDMAResult, sizeof(AllocateDMAResult), &dwRet))
		{
			error = 2;			
		}
		PlayDMAChannelNumber = AllocateDMAResult.ucChannelNumber;
		PlayDmaIntID = AllocateDMAResult.dwInterruptID;
	}		
	if( !error )
	{
		DmaPlayEvent = CreateEvent( NULL, 0 , 0 , NULL );		
		if( DmaPlayEvent )
		{
			if (!InterruptInitialize( PlayDmaIntID , DmaPlayEvent , NULL, 0))
				error = 4;
		}
		else
			error = 5;
	}
	if( error )
		RETAILMSG( (DebugMsgMask&DebugMsg_Important ), (TEXT( "AACI : AllocPlayDMA : %d\r\n" ) , error ));
	return error;
}


int ReleaseRecordDMA(void)
{
	int error = 0;
	DWORD dwRet;
	if( RecordDMAChannelNumber >= 0 && RecordDMAChannelNumber <= 7 )
	{
		FREE_DMA_PARAMS FreeDMAParams;
		FREE_DMA_RESULT FreeDMAResult;
		FreeDMAParams.ucChannelNumber = RecordDMAChannelNumber;
		if (!KernelIoControl(IOCTL_HAL_FREE_DMA_CHANNEL,
			&FreeDMAParams, sizeof(FreeDMAParams),
			&FreeDMAResult, sizeof(FreeDMAResult), &dwRet))
		{
			error = 1;
		}
	}
	if( DmaRecordEvent )
		CloseHandle( DmaRecordEvent );
	if( RecordDmaIntID )
		InterruptDisable( RecordDmaIntID );
	return error;
}

int StartRecordDMA( LPSTR buffer , DWORD size , int* actualbuffered)
{	
	int error = 0;
	static DWORD pages[0x1000];
	DWORD FIFOAddr = 0x20037090 , dwRet;
	START_DMA_PARAMS    StartDMAParams;
	
	LockPages( buffer , size , pages , LOCKFLAG_READ|LOCKFLAG_WRITE );
//	LockPages( PlayBuffer , PAGE_SIZE*10 , pages , LOCKFLAG_READ|LOCKFLAG_WRITE );
	
	pages[0] = (pages[0]&(~0xfff)) | ((DWORD)buffer&0xfff);

	StartDMAParams.ucChannelNumber = (unsigned char)RecordDMAChannelNumber;	
	StartDMAParams.pdwSourceBuffer = &FIFOAddr;
	StartDMAParams.pdwDestBuffer = pages;
	StartDMAParams.dwTransferSize = size;	
	
	if ( !KernelIoControl(	HAL_IOCTL_AACI_DMA , &StartDMAParams, sizeof(StartDMAParams),
								actualbuffered, sizeof(int), &dwRet))
	{
		error = 1;
		RETAILMSG( (DebugMsgMask&DebugMsg_Important ), (TEXT("aaci : Start dma error\r\n" )));
	}
	return error;
}

int InitRecordDMA()
{		
	int error = 0;
	unsigned long dwRet = 0;
	
	INITIALIZE_DMA_PARAMS InitializeDMAParams;
	INITIALIZE_DMA_RESULT InitializeDMAResult;
	InitializeDMAParams.ucChannelNumber = RecordDMAChannelNumber;
	InitializeDMAParams.ucSourceWidth = TRANSFER_WIDTH_WORD; 
	InitializeDMAParams.ucDestWidth = TRANSFER_WIDTH_WORD; 
	InitializeDMAParams.ucSourceBurstSize = BURST_SIZE_64; 
	InitializeDMAParams.ucDestBurstSize = BURST_SIZE_64;
	InitializeDMAParams.fIncrementSource = FALSE;
	InitializeDMAParams.fIncrementDest = TRUE;	
	InitializeDMAParams.ucFlowControl = FLOW_PER_MEM_DMAC;
	
	if (!KernelIoControl(IOCTL_HAL_INITIALIZE_DMA_CHANNEL,
		&InitializeDMAParams, sizeof(InitializeDMAParams),
		&InitializeDMAResult, sizeof(InitializeDMAResult), &dwRet))
	{
		error = 1;
	}
	
	return error;
}

int AllocRecordDMA(void)
{
	int error = 0;
	unsigned long dwRet = 0;
	
	if( !error )
	{
		ALLOCATE_DMA_PARAMS AllocateDMAParams;
		ALLOCATE_DMA_RESULT AllocateDMAResult;
		AllocateDMAParams.ucSourceDevice = 13;
		AllocateDMAParams.ucDestDevice = 0;
		AllocateDMAParams.ucPreferedPriority = 0xff;    // no preference
		if (!KernelIoControl(IOCTL_HAL_ALLOCATE_DMA_CHANNEL,
			&AllocateDMAParams, sizeof(AllocateDMAParams),
			&AllocateDMAResult, sizeof(AllocateDMAResult), &dwRet))
		{
			error = 2;			
		}
		RecordDMAChannelNumber = AllocateDMAResult.ucChannelNumber;
		RecordDmaIntID = AllocateDMAResult.dwInterruptID;
	}		
	if( !error )
	{
		DmaRecordEvent = CreateEvent( NULL, 0 , 0 , NULL );		
		if( DmaRecordEvent )
		{
			if (!InterruptInitialize( RecordDmaIntID , DmaRecordEvent , NULL, 0))
				error = 4;
		}
		else
			error = 5;
	}
	if( error )
		RETAILMSG( (DebugMsgMask&DebugMsg_Important ), (TEXT( "AACI : AllocPlayDMA : %d\r\n" ) , error ));
	return error;
}