--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/baseport/syborg/soundsc/virtio_io.h	Thu Mar 04 00:55:21 2010 +0000
@@ -0,0 +1,83 @@
+/*
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Accenture Ltd
+*
+* Contributors:
+*
+* Description: This file is a part of sound driver for Syborg adaptation.
+*
+*/
+
+#ifndef VIRTIO_IO_H
+#define VIRTIO_IO_H
+
+#include "virtio.h"
+#include <e32def.h>
+
+namespace VirtIo
+{
+
+class DIo : public DBase, public MIo
+	{
+public:
+	DIo( TAny* aIoBase ): iIoBase( reinterpret_cast<TUint32*>( aIoBase ) )
+		{ }
+	
+	virtual void GetDeviceIds( TUint32 &aPeripheralId, TUint32 &aDeviceId );
+	
+	virtual void SetQueueBase( TUint aQId, TAny* iDescRegion );
+	
+	virtual TAny* GetQueueBase( TUint aQId);
+	
+	virtual TUint GetQueueCount( TUint aQId )
+		{
+		write(EIoQueueSelect, aQId);
+		return read(EIoQueueSize);
+		}
+	
+	virtual void PostQueue( TUint aQId )
+		{ write(EIoQueueNotify, aQId); SYBORG_VIRTIO_DEBUG("PostQueue Q%d", aQId ); }
+		
+	virtual TBool EnableInterrupt( TBool aEnable )
+		{ return swap(EIoInterruptEnable, aEnable?1:0); }
+
+	virtual void SetStatus( TUint status )
+		{ write(EIoStatus, status ); }
+		
+	virtual void ClearInteruptStatus()
+		{ write( EIoInterruptStatus, 1 ); }
+
+	virtual TBool InteruptStatus()
+		{ return read( EIoInterruptStatus ); }
+		
+	
+	void Reset()
+		{ SetStatus( EStatusReset ); };
+	
+	
+private:	
+	void write(TUint idx, TUint32 value )
+		{ iIoBase[idx] = value; }
+		
+	TUint32 read(TUint idx)
+		{ return iIoBase[idx]; }
+		
+	TUint32 swap(TUint idx, TUint32 value )
+		{ 
+		TUint32 t = iIoBase[idx]; 
+		iIoBase[idx] = value; 
+		return t;
+		}
+	
+	volatile TUint32* iIoBase;
+
+	};
+
+} // namespace VirtIo
+
+#endif