// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// 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:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32\drivers\pbus\pbusmedia.cpp

// 

//

#include <drivers/pbusmedia.h>

void mediaCallBack(TAny* aPtr, TInt aReason, TAny* a1, TAny* a2)

	{

	DPBusPrimaryMedia* pM=(DPBusPrimaryMedia*)aPtr;

	__KTRACE_OPT(KLOCDRV,Kern::Printf("mediaCallBack media %d, reason %d, a1=0x%x, a2=0x%x",pM->iMediaId,aReason,a1,a2));

	switch (aReason)

		{

		case TPBusCallBack::EPBusStateChange:

			pM->PBusStateChange((TInt)a1,(TInt)a2);

			break;

		}

	}

/**

  Constructor for DPBusPrimaryMedia. Initializes the iSocket with aSocket.

  @param aSocket	Pointer to DPBusSocket object

  @see DPBusPrimaryMedia::iSocket

  */

DPBusPrimaryMedia::DPBusPrimaryMedia(DPBusSocket* aSocket)

	:	iSocket(aSocket)

	{

	}

/**

  This function install a media call back for a removable media device.

  @param aDevice	Local media ID.

  @param aMediaId	Media Id (unique for a media subsystem)

  @param aLastMediaId	This indicates number of used media ids+ number of DMedia objects to be associated with the media driver

  @return KErrNone if successful,

          otherwise one of the other system wide error codes.

  @see DPrimaryMediaBase::Create()

  */

TInt DPBusPrimaryMedia::Create(TMediaDevice aDevice, TInt aMediaId, TInt aLastMediaId)

	{

	// Permanently install a media call back if for a removable media device

	TInt r=KErrArgument;

	iPBusState=EPBusCardAbsent;

	if (__IS_REMOVABLE(aDevice))

		{

		iBusCallBack.iFunction=mediaCallBack;

		iBusCallBack.iPtr=this;

		iBusCallBack.SetSocket(iSocket->iSocketNumber);

		iDfcQ=&iSocket->iDfcQ;

		r=DPrimaryMediaBase::Create(aDevice,aMediaId,aLastMediaId);

		if (r==KErrNone)

			{

			iBusCallBack.Add();

			iPBusState=iSocket->State();

			iMsgQ.Receive();

			}

		}

	return r;

	}

/**

  Checks the PBUS state.

  @return KErrNone if successful,

          KErrNotReady if card is absent.

  @see TPBusState

  */

TInt DPBusPrimaryMedia::QuickCheckStatus()

	{

	TInt r=KErrNone;

	if (iSocket && iSocket->State()==EPBusCardAbsent)

		r=KErrNotReady;

	__KTRACE_OPT(KLOCDRV,Kern::Printf("DPBusPrimaryMedia::QuickCheckStatus media %d returns %d",iMediaId,r));

	return r;

	}

/**

  This function is called by the local media device driver to force a remount of the media device.

  @param  aFlags	Corresponds to force media change.

  @return KErrNone if successful, 

		  otherwise one of the other system wide error codes. 

  @see TForceMediaChangeFlags

  */

TInt DPBusPrimaryMedia::ForceMediaChange(TInt aFlags)

	{

	if ((aFlags != KMediaRemountForceMediaChange) || (iPBusState == EPBusCardAbsent))

		{

		TInt pbusState = iPBusState;

		// This should ensure NotifyMediaChange() is called for ALL primary media attached to this socket

		iSocket->ChangeState(EPBusCardAbsent, KErrNotReady);

		// If a request was cancelled it's possible that the socket controller has been left in an 

		// unusable state which might cause the next request to fail, so power down the socket to be safe

		iSocket->ResetSocket(EFalse);

		iSocket->ChangeState(pbusState == EPBusCardAbsent ? EPBusCardAbsent : EPBusOff, KErrNotReady);

		return KErrCompletion;

		}

	iSocket->ForceMediaChange();

	return KErrNone;

	}

/**

  Called by clients to power up the PBUS.

  @return KErrNone if successful,

  		  otherwise one of the other system wide error codes.

  @see  DPBusSocket::PowerUp()

  */

TInt DPBusPrimaryMedia::InitiatePowerUp()

	{

	}

/**

  Flags the media driver as entering a critical part of its processing.

  @return KErrNone if successful,

  		  otherwise one of the other system wide error codes.

  @see DPBusSocket::InCritical()

  */

TInt DPBusPrimaryMedia::DoInCritical()

	{

	}

/**

  Flags the media driver as leaving a critical part of its processing.

  @return KErrNone if successful, 

  		  otherwise one of the other system wide error codes.

  @see DPBusSocket::EndInCritical()

  */

void DPBusPrimaryMedia::DoEndInCritical()

	{

	iSocket->EndInCritical();

	}

/**

  Sets the incremental value of current consumption to aCurrent.

  @param aCurrent Delta Current in Milliamps.

  @see DPBusSocket::DeltaCurrentConsumption()

  */

void DPBusPrimaryMedia::DeltaCurrentConsumption(TInt aCurrent)

	{

	iSocket->DeltaCurrentConsumption(aCurrent);

	}

/**

  Gets the default drive capability/attributes.

  @param aCaps	A reference to a client-supplied TLocalDriveCapsV2 class to be filled by this function.

  @see TLocalDriveCapsV2

  @see TMediaType

  */

void DPBusPrimaryMedia::DefaultDriveCaps(TLocalDriveCapsV2& aCaps)

	{

	// aCaps is zeroed beforehand

	aCaps.iType = EMediaNotPresent;

	aCaps.iDriveAtt = KDriveAttLocal|KDriveAttRemovable;

	}

/**

  Checks whether it is a removable media device or not.

  @param aSocketNum	This will be updated with socket number

  @return ETrue if Removable Device, EFalse if the device is Non-Removable.

  */

TBool DPBusPrimaryMedia::IsRemovableDevice(TInt& aSocketNum)

	{

	aSocketNum=iSocket->iSocketNumber;

	return(ETrue);

	}

void DPBusPrimaryMedia::PBusStateChange(TInt aState, TInt anError)

	{

	// receive power down and media change notifications

	__KTRACE_OPT(KLOCDRV,Kern::Printf("DPBusPrimaryMedia(%d)::PBusStateChange state %d, err %d",iMediaId,aState,anError));

	if (aState!=iPBusState)

		{

		TInt oldState = iPBusState;

		iPBusState=aState;

		switch (aState)

			{

			case EPBusCardAbsent:

				NotifyMediaChange();

				break;

			case EPBusOff:

				switch (anError)

					{

					case KErrNone:

						// machine power down

						NotifyPowerDown();

						break;

					case KErrTimedOut:					

						// machine power down

						NotifyPowerDown();

						if(oldState == EPBusCardAbsent)

							{

							// powering down after power up with no card present.

							// ...to prevent the bus powering up again, maintain

							//    the card state as absent.  A media change will

							//    update the status to allow the bus to power up.

							iPBusState = EPBusCardAbsent;

							}

						break;

					case KErrNotReady:

						// card detected following door close

						NotifyMediaPresent();

						break;

					case KErrAbort:

						NotifyEmergencyPowerDown();

						break;

					default:

						if (iState==EPoweringUp1 || iState==EPoweringUp2)

							PowerUpComplete(anError);

						break;

					}

			case EPBusPoweringUp:

				// no action required

				break;

			case EPBusOn:

				// bus is now powered up

				if (iState==EPoweringUp1 || iState==EPoweringUp2)

					PowerUpComplete(anError);

				break;

			case EPBusPsuFault:

				NotifyPsuFault(anError);

				break;

			case EPBusPowerUpPending:

				// no action required

				break;

			default:

				break;

			}

		}

	}