--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/omap3530/omap3530_drivers/gpio/gpio.cpp	Thu Oct 15 12:59:54 2009 +0100
@@ -0,0 +1,409 @@
+// Copyright (c) 1994-2009 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:
+// omap3530/omap3530_drivers/gpio/gpio.cpp
+//
+
+#include <kern_priv.h>
+#include <assp/omap3530_assp/omap3530_gpio.h>
+#include <assp/omap3530_assp/omap3530_hardware_base.h>
+#include <assp/omap3530_assp/omap3530_irqmap.h>
+
+#include <assp.h>
+//#include <nkern.h>
+#include <assp/omap3530_assp/gpio.h>
+
+GLREF_C TInt InitGpioInterrupts();
+
+
+TSpinLock GPIOModeLock(/*TSpinLock::EOrderNone*/);
+TSpinLock GPIOWakeLock(/*TSpinLock::EOrderNone*/);
+TSpinLock GPIOLevelLock(/*TSpinLock::EOrderNone*/);
+
+GPIO::TGpioMode	ThePinMode[ KHwGpioPinMax ];
+TUint32 ThePinIsEnabled[ KHwGpioBanks ];
+__ASSERT_COMPILE( KHwGpioPinsPerBank <= 32 );
+
+#if 0
+static void dumpGpioBank(TUint aBankAddr)
+	{
+		Kern::Printf("GPIO_SYSCONFIG at %x is  %x",aBankAddr +KGPIO_SYSCONFIG,AsspRegister::Read32(aBankAddr +KGPIO_SYSCONFIG) );
+		Kern::Printf("GPIO_SYSSTATUS at %x is  %x",aBankAddr +KGPIO_SYSSTATUS,AsspRegister::Read32(aBankAddr +KGPIO_SYSSTATUS));
+		Kern::Printf("GPIO_IRQSTATUS1 at %x is  %x",aBankAddr +KGPIO_IRQSTATUS1,AsspRegister::Read32(aBankAddr +KGPIO_IRQSTATUS1) );
+		Kern::Printf("GPIO_IRQENABLE1 at %x is  %x",aBankAddr +KGPIO_IRQENABLE1,AsspRegister::Read32(aBankAddr +KGPIO_IRQENABLE1) );
+		Kern::Printf("GPIO_WAKEUPENABLE at %x is  %x",aBankAddr +KGPIO_WAKEUPENABLE,AsspRegister::Read32(aBankAddr +KGPIO_WAKEUPENABLE) );		
+		Kern::Printf("GPIO_CTRL at %x is  %x",aBankAddr +KGPIO_CTRL,AsspRegister::Read32(aBankAddr +KGPIO_CTRL) );
+		Kern::Printf("GPIO_OE at %x is  %x",aBankAddr +KGPIO_CTRL,AsspRegister::Read32(aBankAddr +KGPIO_OE) );
+	}
+#endif
+
+
+EXPORT_C TInt GPIO::SetPinMode(TInt aId, TGpioMode aMode)
+	{	
+	TInt irq = __SPIN_LOCK_IRQSAVE(GPIOModeLock);
+	if(ThePinMode[ aId ] != aMode)
+		{
+		ThePinMode[ aId ] = aMode;
+		TUint bank = GPIO_PIN_BANK( aId );
+		TUint pinMask = 1 << GPIO_PIN_OFFSET( aId );
+
+		if( aMode == GPIO::EEnabled)
+			{
+			if( 0 == ThePinIsEnabled[ bank ] )
+				{
+				// First enabled pin in bank
+				AsspRegister::Modify32(GPIO_BASE_ADDRESS( aId ) +KGPIO_CTRL,KClearNone,0x1);
+				}
+
+			ThePinIsEnabled[ bank ] |= pinMask;
+			}
+		else
+			{
+			ThePinIsEnabled[ bank ] &= ~pinMask;
+			
+			if( 0 == ThePinIsEnabled[ bank ] )
+				{
+				// Bank can be disabled
+				AsspRegister::Modify32(GPIO_BASE_ADDRESS( aId ) +KGPIO_CTRL,0x1, KSetNone);
+				}
+			}
+		}
+	__SPIN_UNLOCK_IRQRESTORE(GPIOModeLock,irq);
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetPinMode(TInt aId, TGpioMode & aMode)
+	{
+	aMode = ThePinMode[ aId ];
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::SetPinDirection(TInt aId, TGpioDirection aDirection)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::SetPinBias OOB ",KErrArgument));
+	
+	if (aDirection == ETriStated)
+		{
+		return KErrNotSupported;
+		}
+			
+    if (aDirection == EInput)
+        {
+        AsspRegister::Modify32(GPIO_BASE_ADDRESS(aId)+KGPIO_OE, KClearNone, GPIO_PIN_OFFSET(aId));
+        }
+    else
+        {
+        AsspRegister::Modify32(GPIO_BASE_ADDRESS(aId)+KGPIO_OE, GPIO_PIN_OFFSET(aId), KSetNone);
+        }
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetPinDirection(TInt aId, TGpioDirection& aDirection)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetPinDirection OOB ",KErrArgument));
+	
+	if(AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_OE) & GPIO_PIN_OFFSET(aId))
+		aDirection=EInput;	
+	else
+		aDirection=EOutput;
+	
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::SetPinBias(TInt aId, TGpioBias aBias)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::SetPinBias OOB ",KErrArgument));
+	return KErrNotSupported;
+	}
+
+EXPORT_C TInt GPIO::GetPinBias(TInt aId, TGpioBias& aBias)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetPinBias OOB ",KErrArgument));
+	return KErrNotSupported;
+	}
+
+EXPORT_C TInt GPIO::SetPinIdleConfigurationAndState(TInt aId, TInt /*aConf*/)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::SetPinIdleConfigurationAndState OOB ",KErrArgument));
+	return KErrNotSupported;
+	}
+
+EXPORT_C TInt GPIO::GetPinIdleConfigurationAndState(TInt aId, TInt& aBias)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetPinIdleConfigurationAndState OOB ",KErrArgument));
+	return KErrNotSupported;
+	}
+
+EXPORT_C TInt GPIO::BindInterrupt(TInt aId,	TGpioIsr aIsr, TAny* aPtr)
+	{
+	return Interrupt::Bind( EGPIOIRQ_FIRST + aId,aIsr,aPtr);
+	}
+
+EXPORT_C TInt GPIO::UnbindInterrupt(TInt aId)
+	{
+	return Interrupt::Unbind( EGPIOIRQ_FIRST + aId );
+	}
+
+EXPORT_C TInt GPIO::EnableInterrupt(TInt aId)
+	{
+	return Interrupt::Enable( EGPIOIRQ_FIRST + aId );	
+	}
+
+EXPORT_C TInt GPIO::DisableInterrupt(TInt aId)
+	{
+	return Interrupt::Disable( EGPIOIRQ_FIRST + aId );
+	}
+
+EXPORT_C TInt GPIO::ClearInterrupt(TInt aId)
+	{
+	return Interrupt::Clear( EGPIOIRQ_FIRST + aId );
+	}
+
+EXPORT_C TInt GPIO::IsInterruptEnabled(TInt aId, TBool& aEnable)
+	{
+	aEnable = AsspRegister::Read32(GPIO_BASE_ADDRESS( aId ) + KGPIO_IRQENABLE1) & GPIO_PIN_OFFSET(aId);	
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetMaskedInterruptState(TInt aId, TBool& aActive)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetMaskedInterruptState OOB ",KErrArgument));
+	aActive = AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_IRQSTATUS1) & GPIO_PIN_OFFSET(aId);
+	
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetRawInterruptState(TInt aId, TBool& aActive)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetRawInterruptState OOB ",KErrArgument));
+	
+	aActive = AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_IRQSTATUS1) & GPIO_PIN_OFFSET(aId);
+
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::SetInterruptTrigger(TInt aId, TGpioDetectionTrigger aTrigger)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::SetInterruptTrigger OOB ",KErrArgument));
+	
+	TInt baseAddr = GPIO_BASE_ADDRESS(aId);
+	TUint irqFlags=0;
+	//first we clear the current trigger(s)
+	//then set the new for each case
+	switch (aTrigger)
+		{
+		case ELevelLow:
+
+			irqFlags = NKern::DisableAllInterrupts();//__SPIN_LOCK_IRQSAVE_W(GPIOLevelSpinLock);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT1, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_FALLINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_RISINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+			
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT0, KClearNone, GPIO_PIN_OFFSET(aId));
+			NKern::RestoreInterrupts(irqFlags);//__SPIN_UNLOCK_IRQRESTORE_W(GPIOLevelSpinLock,irqFlags);	
+			break;
+		case ELevelHigh:
+			
+			irqFlags = NKern::DisableAllInterrupts();//__SPIN_LOCK_IRQSAVE_W(GPIOLevelSpinLock);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT0, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_FALLINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_RISINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+				
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT1, KClearNone, GPIO_PIN_OFFSET(aId));
+			NKern::RestoreInterrupts(irqFlags);//__SPIN_UNLOCK_IRQRESTORE_W(GPIOLevelSpinLock,irqFlags);
+				
+			break;
+		case EEdgeFalling:
+
+			irqFlags = NKern::DisableAllInterrupts();//__SPIN_LOCK_IRQSAVE_W(GPIOLevelSpinLock);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT0, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT1, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_RISINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+		
+			AsspRegister::Modify32(baseAddr+KGPIO_FALLINGDETECT, KClearNone, GPIO_PIN_OFFSET(aId));
+			NKern::RestoreInterrupts(irqFlags);//__SPIN_UNLOCK_IRQRESTORE_W(GPIOLevelSpinLock,irqFlags);
+			break;
+		case EEdgeRising:
+			
+			irqFlags = NKern::DisableAllInterrupts();//__SPIN_LOCK_IRQSAVE_W(GPIOLevelSpinLock);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT0, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT1, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_FALLINGDETECT, GPIO_PIN_OFFSET(aId),KSetNone);
+			
+			AsspRegister::Modify32(baseAddr+KGPIO_RISINGDETECT, KClearNone, GPIO_PIN_OFFSET(aId));
+			NKern::RestoreInterrupts(irqFlags);//__SPIN_UNLOCK_IRQRESTORE_W(GPIOLevelSpinLock,irqFlags);			
+			break;
+		case EEdgeBoth:
+				
+			irqFlags = NKern::DisableAllInterrupts();//__SPIN_LOCK_IRQSAVE_W(GPIOLevelSpinLock);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT0, GPIO_PIN_OFFSET(aId),KSetNone);
+			AsspRegister::Modify32(baseAddr+KGPIO_LEVELDETECT1, GPIO_PIN_OFFSET(aId),KSetNone);
+			
+			AsspRegister::Modify32(baseAddr+KGPIO_FALLINGDETECT, KClearNone, GPIO_PIN_OFFSET(aId));
+			AsspRegister::Modify32(baseAddr+KGPIO_RISINGDETECT, KClearNone, GPIO_PIN_OFFSET(aId));
+			NKern::RestoreInterrupts(irqFlags);//__SPIN_UNLOCK_IRQRESTORE_W(GPIOLevelSpinLock,irqFlags);
+			
+		break;
+		default:
+			return KErrArgument;
+		}
+
+	return KErrNone;
+	}
+
+
+EXPORT_C TInt GPIO::EnableWakeup(TInt aId)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::EnableWakeup OOB ",KErrArgument));
+	
+	TInt baseAddr = GPIO_BASE_ADDRESS(aId);
+	
+	TInt irq = __SPIN_LOCK_IRQSAVE(GPIOWakeLock);
+	AsspRegister::Modify32(baseAddr+KGPIO_SYSCONFIG,KClearNone, 1 << 2 );
+	AsspRegister::Modify32(baseAddr+KGPIO_SETWKUENA,KClearNone ,GPIO_PIN_OFFSET(aId));
+	__SPIN_UNLOCK_IRQRESTORE(GPIOWakeLock,irq);
+	
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::DisableWakeup(TInt aId)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::DisableWakeup OOB ",KErrArgument));
+	
+	TInt baseAddr = GPIO_BASE_ADDRESS(aId);
+	
+	TInt irq = __SPIN_LOCK_IRQSAVE(GPIOWakeLock);
+	AsspRegister::Modify32(baseAddr+KGPIO_SYSCONFIG,1 << 2 ,KSetNone);
+	AsspRegister::Modify32(baseAddr+KGPIO_CLEARWKUENA,KClearNone,GPIO_PIN_OFFSET(aId));
+	__SPIN_UNLOCK_IRQRESTORE(GPIOWakeLock,irq);
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::IsWakeupEnabled(TInt aId, TBool& aEnable)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::IsWakeupEnabled OOB ",KErrArgument));
+	
+	aEnable = AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_WAKEUPENABLE) & GPIO_PIN_OFFSET(aId);
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::SetWakeupTrigger(TInt aId, TGpioDetectionTrigger aTrigger)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::SetWakeupTrigger OOB ",KErrArgument));
+	return KErrNotSupported;
+	}
+
+// WARNING: Changing debouncing time will change it for all pins in the bank
+EXPORT_C TInt GPIO::SetDebounceTime(TInt aId, TInt aTime)
+	{
+	TGpioDirection direction;
+	GetPinDirection(aId, direction);
+	
+	if(direction==EOutput)
+		{
+		// The pin must be configured as input.	
+		return KErrNotSupported;
+		}
+	
+	//convert the Ms input time into units of 31us 
+	TInt timeSteps =  aTime / 31;
+	if(timeSteps>127)
+		{
+#ifdef _DEBUG
+		Kern::Printf("Warning: Tried to set the GPIO debounce time to %dus, \
+						which is greater than the maximum supported 3937us.", aTime);
+#endif
+		timeSteps=127; // The maximum debounce value.
+		}
+	
+	TInt baseAddr = GPIO_BASE_ADDRESS(aId);
+	
+	TUint irqFlags = __SPIN_LOCK_IRQSAVE(gpio::GPIODebounceSpinLock);
+	AsspRegister::Write32(baseAddr+KGPIO_DEBOUNCINGTIME, timeSteps & KGPIO_DEBOUNCE_TIME_MASK);
+	AsspRegister::Modify32(baseAddr+KGPIO_DEBOUNCENABLE, KClearNone, GPIO_PIN_OFFSET(aId));
+	__SPIN_UNLOCK_IRQRESTORE(gpio::GPIODebounceSpinLock,irqFlags);
+
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetDebounceTime(TInt aId, TInt& aTime)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetDebounceTime OOB ",KErrArgument));
+	aTime=AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_DEBOUNCINGTIME); // The time in in multiples of 31 microseconds. We should probably use a nicer unit..
+		
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::SetOutputState(TInt aId, TGpioState aState)
+	{
+	if(aState==GPIO::ELow)
+		{
+		AsspRegister::Modify32(GPIO_BASE_ADDRESS(aId) + KGPIO_DATAOUT, GPIO_PIN_OFFSET(aId), KSetNone);
+		}
+	else
+		{
+		AsspRegister::Modify32(GPIO_BASE_ADDRESS(aId) + KGPIO_DATAOUT, KClearNone, GPIO_PIN_OFFSET(aId));
+		}
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetInputState(TInt aId,	TGpioState& aState)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetInputState OOB ",KErrArgument));
+
+	aState= ( AsspRegister::Read32(GPIO_BASE_ADDRESS(aId) + KGPIO_DATAIN) & GPIO_PIN_OFFSET(aId) ? 
+			GPIO::EHigh:
+			GPIO::ELow);
+
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetOutputState(TInt aId, TGpioState& aState)
+	{
+	__ASSERT_ALWAYS(GPIO_PIN_BOUNDS(aId),Kern::Fault(" GPIO::GetOutputState OOB ",KErrArgument));
+		
+	aState = (AsspRegister::Read32(GPIO_BASE_ADDRESS(aId)+KGPIO_DATAOUT)& GPIO_PIN_OFFSET(aId) ?
+				aState=GPIO::EHigh:
+				aState=GPIO::ELow);
+	return KErrNone;
+	}
+
+EXPORT_C TInt GPIO::GetInputState(TInt aId, TGpioCallback* /*aCb*/)
+	{
+	return KErrNotSupported;
+	}
+
+EXPORT_C TInt GPIO::SetOutputState(TInt aId, TGpioState	aState, TGpioCallback* /*aCb*/)
+	{
+	return KErrNotSupported;
+	}
+
+
+DECLARE_STANDARD_EXTENSION()
+	{
+	
+	TInt i=0;
+	for(;i<KHwGpioBanks;i++)
+		{	
+		//spins here
+		AsspRegister::Write32(GPIO_BASE_ADDRESS(i*KHwGpioPinsPerBank)+KGPIO_SYSCONFIG,0x01 | 1 <<2);
+		AsspRegister::Write32(GPIO_BASE_ADDRESS(i*KHwGpioPinsPerBank)+KGPIO_CTRL,0x00);
+		ThePinIsEnabled[i]=0;
+		}
+
+	for(i=0; i<KHwGpioPinMax; i++)
+		{
+		//ThePinMode[ i ]=GPIO::EIdle;
+		}
+	return InitGpioInterrupts();
+	}