/*

* 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