--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/drivers/adc/d_adc.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,219 @@
+// 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\adc\d_adc.cpp
+// Generic ADC driver
+// 
+//
+
+
+#include <adc.h>
+
+/******************************************************
+ * ADC Channel
+ ******************************************************/
+EXPORT_C TAdcChannel::TAdcChannel(TInt anAdc)
+	:	iChannelId(-1), iCommandCount(0), iCommandList(NULL),
+		iReadings(NULL)
+	{
+	iNext=NULL;
+//	iPriority=0;
+	if (anAdc>=0 && anAdc<DAdc::NumberOfAdcs)
+		iAdc=DAdc::TheAdcs[anAdc];
+	else
+		iAdc=NULL;
+	}
+
+EXPORT_C void TAdcChannel::Read(TInt* aReadingBuffer)
+//
+// Initiate a reading of this channel
+//
+	{
+	TInt irq=NKern::DisableAllInterrupts();
+	if (!iNext)
+		{
+		iReadings=aReadingBuffer;
+		iAdc->Add(this);
+		}
+	NKern::RestoreInterrupts(irq);
+	}
+
+EXPORT_C void TAdcChannel::Preamble()
+//
+// Default preamble does nothing
+//
+	{
+	}
+
+EXPORT_C void TAdcChannel::Postamble()
+//
+// Default postamble does nothing
+//
+	{
+	}
+
+
+/******************************************************
+ * ADC Controller
+ ******************************************************/
+LOCAL_C void timerExpired(TAny* aPtr)
+	{
+	((DAdc*)aPtr)->TimerExpired();
+	}
+
+DAdc::DAdc()
+	:	iTimer(timerExpired,this)
+	{
+//	iCurrentChannel=NULL;
+//	iCurrentCommand=0;
+//	iCommandPtr=0;
+//	iCommandCount=0;
+//	iMinPriority=0;
+	}
+
+DAdc::~DAdc()
+	{
+	}
+
+EXPORT_C TInt DAdc::SetMinPriority(TInt anAdc, TInt aPriority)
+	{
+	if (anAdc<0 || anAdc>=NumberOfAdcs)
+		return KErrArgument;
+	if (aPriority<0 || aPriority>KNumAdcChannelPriorities)
+		return KErrArgument;
+	return TheAdcs[anAdc]->DoSetMinPriority(aPriority);
+	}
+
+TInt DAdc::DoSetMinPriority(TInt aPriority)
+	{
+	TInt irq=NKern::DisableAllInterrupts();
+	if (aPriority<iMinPriority)
+		{
+		if (iList.iPresent[0])
+			{
+			TAdcChannel* pN=iList.First();
+			if (pN->iPriority>=aPriority)
+				{
+				iList.Remove(pN);
+				Execute(pN);
+				}
+			}
+		}
+	iMinPriority=aPriority;
+	NKern::RestoreInterrupts(irq);
+	return KErrNone;
+	}
+
+void DAdc::Add(TAdcChannel* aChannel)
+//
+// Queue another ADC reading request
+//
+	{
+	if (iCurrentChannel || (aChannel->iPriority<iMinPriority))
+		iList.Add(aChannel);
+	else
+		Execute(aChannel);
+	}
+
+void DAdc::Execute(TAdcChannel* aChannel)
+//
+// Begin execution of an ADC request
+// This runs in an ISR or with interrupts disabled
+//
+	{
+	aChannel->iNext=(TPriListLink*)1;	// so channel will not be queued again
+	iCurrentChannel=aChannel;
+	iCommandPtr=aChannel->iCommandList;
+	iCommandCount=aChannel->iCommandCount;
+	NextCommand();
+	}
+
+void DAdc::NextCommand()
+//
+// Perform the next command in the command list
+// This runs in an ISR or with interrupts disabled
+//
+	{
+	TBool wait=EFalse;
+	TAdcChannel* pC=iCurrentChannel;
+	if (iCommandCount)
+		{
+		TInt c=*iCommandPtr++;
+		iCurrentCommand=c;
+		iCommandCount--;
+		if (c & EAdcCmdPreamble)
+			pC->Preamble();
+		if (c & EAdcCmdPostamble)
+			pC->Postamble();
+		if (c & EAdcCmdWait)
+			{
+			iTimer.OneShot(c & 0xffff);
+			wait=ETrue;
+			}
+		else if (c & EAdcCmdReading)
+			{
+			StartConversion(pC->iChannelId);
+			wait=ETrue;
+			}
+		}
+	if (iCommandCount==0 && !wait)
+		{
+		iCurrentChannel=NULL;
+		pC->iNext=NULL;
+		if (iList.iPresent[0])
+			{
+			TAdcChannel* pN=iList.First();
+			if (pN->iPriority>=iMinPriority)
+				{
+				iList.Remove(pN);
+				Execute(pN);
+				}
+			}
+		pC->Complete();
+		}
+	}
+
+void DAdc::Start()
+//
+// Called on completion of initialisation to start processing requests
+// This runs in an ISR
+//
+	{
+	iCurrentChannel=NULL;
+	if (iList.iPresent[0])
+		{
+		TAdcChannel* pN=iList.First();
+		iList.Remove(pN);
+		Execute(pN);
+		}
+	}
+
+void DAdc::ConversionComplete(TInt aValue)
+//
+// Called when a conversion has completed
+// This runs in an ISR
+//
+	{
+	if ((iCurrentCommand & EAdcCmdDiscard)==0)
+		*(iCurrentChannel->iReadings)++=aValue;
+	NextCommand();
+	}
+
+void DAdc::TimerExpired()
+//
+// Called in ISR when timer expires
+//
+	{
+	NextCommand();
+	}
+