sl@0: // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\drivers\iic_transaction.cpp
sl@0: // IIC Transaction API Implementation
sl@0: //
sl@0: 
sl@0: #include <drivers/iic_transaction.h>
sl@0: #include <drivers/iic_channel.h>
sl@0: 
sl@0: EXPORT_C void TIicBusSlaveCallback::DfcFunc(TAny* aPtr)
sl@0:     {
sl@0:     TIicBusSlaveCallback* pCb = (TIicBusSlaveCallback*) aPtr;
sl@0: 	// pCb can be NULL if a client corrupt it after the dfc has been queued
sl@0:     __ASSERT_DEBUG(pCb != NULL, Kern::Fault(KIicPanic,__LINE__));
sl@0: 	DIicBusChannelSlave* chan = pCb->iChannel;
sl@0: 	__ASSERT_DEBUG(chan != NULL, Kern::Fault(KIicPanic,__LINE__));
sl@0: 
sl@0: 	chan->ProcessData(pCb->iTrigger, pCb); // Call PSL to fill in iReturn, iRxWords and/or iTxWords
sl@0: 	//
sl@0: 	// Only invoke the client's callback (and update the state machine) if asynchronous channel capture has
sl@0: 	// completed, or if one of the requested triggers has occurred or if a bus error has been witnessed
sl@0: 	TInt8 callbackTrig = 0;
sl@0: 	TInt callbackRet = 0;
sl@0: 	TInt nextSteps = chan->UpdateReqTrig(callbackTrig, callbackRet);
sl@0: 	if(nextSteps & DIicBusChannelSlave::EStopTimer)
sl@0: 		{
sl@0: 		chan->StopTimer();
sl@0: 		}
sl@0: 	if(nextSteps & DIicBusChannelSlave::EInvokeCb)
sl@0: 		{
sl@0: 		(pCb->iCallback)(pCb->iChannelId, callbackRet, (TInt)callbackTrig, pCb->iRxWords, pCb->iTxWords, pCb->iParam);
sl@0: 		// Callback now processed, so re-initialise callback object members
sl@0: 		pCb->iTrigger = 0;
sl@0: 		pCb->iReturn = KErrNone;
sl@0: 		pCb->iRxWords = 0;
sl@0: 		pCb->iTxWords = 0;
sl@0: 		}
sl@0: 	if(nextSteps & DIicBusChannelSlave::EStartTimer)
sl@0: 		{
sl@0: 		chan->StartTimerByState();
sl@0: 		}
sl@0:     }