FCL/sf/os/kernelhwsrv: comparison kernel/eka/drivers/usbcsc/usbcsc

equal deleted inserted replaced

-:43365a9b78a3
+:d8d70de2bd36
-// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// Copyright (c) 2008-2010 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".
 	iNewAltSetting = 0;
 	iAltSettingSeq = 0;
 	return r;
 	}
+// empty a endpoint buffer, this is called when device state enter undefined
+TInt RDevUsbcScClient::Empty(TUint aBufferOffset)
+{
+	TUint8* base = iSharedChunk.Base();
+	SUsbcScBufferHeader* endpointHdr = (SUsbcScBufferHeader*) (aBufferOffset + base);
+	TUint localTail = endpointHdr->iBilTail;
+	TUsbcScTransferHeader* currentTransfer;
+	TInt err=KErrNone;
+	while (ETrue)
+		{
+		if (localTail == (TUint) endpointHdr->iHead)
+			{
+			err = KErrNone;
+			break;
+			}
+		currentTransfer = (TUsbcScTransferHeader*) (base + localTail);
+		localTail = currentTransfer->iNext;
+		} // end while
+	endpointHdr->iBilTail = localTail;
+	endpointHdr->iTail = localTail;
+	return err;
+}
 EXPORT_C TInt RDevUsbcScClient::FinalizeInterface(RChunk*& aChunk)
 	{
 	TInt errorOrhandle = DoControl(EControlRealizeInterface);
 	iSharedChunk.SetReturnedHandle(errorOrhandle);
 	iEndpointStatus = 0x00; //all endpoints are closed at the moment
 	iAlternateSetting = 0;
 	return aChunk->SetReturnedHandle(errorOrhandle);
+	}
+EXPORT_C void RDevUsbcScClient::ResetAltSetting()
+	{
+	if (iAlternateSetting == 0)
+		return;
+	TUsbcScChunkHeader chunkHeader(iSharedChunk);
+	TInt ep;
+	TInt noEp;
+	TUint bufOff;
+	TUsbcScHdrEndpointRecord* endpointInf = NULL;
+	// check if alternate setting contains all IN endpoints
+	noEp = chunkHeader.GetNumberOfEndpoints(iAlternateSetting);
+	// for each used buffer.
+	for (ep=1;ep<=noEp;ep++)
+		{
+		bufOff = chunkHeader.GetBuffer(iAlternateSetting,ep,endpointInf)->Offset();
+		if (endpointInf->Direction() & KUsbScHdrEpDirectionOut)
+			{
+			Empty(bufOff); // we need to remove anythng in the way, and get it ready for reading.
+			}
+		}
+	iAlternateSetting = 0;
 	}
 EXPORT_C TInt RDevUsbcScClient::OpenEndpoint(TEndpointBuffer& aEpB, TInt aEpI)
 	{
 //This drains any old data from an OUT buffer, and gets it ready for reading an ep.
 //aBufferOffset - The offset, into the chunk, that the buffer in question, may be found.
 TInt RDevUsbcScClient::Drain(TUint aBufferOffset)
 {
 	TUint8* base = iSharedChunk.Base();
 	SUsbcScBufferHeader* endpointHdr = (SUsbcScBufferHeader*) (aBufferOffset+base);
 	TUint localTail = endpointHdr->iBilTail;
 	TUsbcScTransferHeader* currentTransfer;
 	TUint16 next = (iAltSettingSeq+1)&0xFFFF;
 	TInt err=KErrNone;
+	TBool aZLP;
 	while (ETrue)
 		{
 		if (localTail == (TUint) endpointHdr->iHead)
 			{
 			break;
 			}
 		currentTransfer = (TUsbcScTransferHeader*) (base + localTail);
 		if (currentTransfer->iAltSettingSeq == next)
 			{
 			iNewAltSetting=currentTransfer->iAltSetting; // record new alt setting
+			aZLP = (currentTransfer->iFlags & KUsbcScShortPacket)!=EFalse;
+			if ((currentTransfer->iBytes==0) && (!aZLP)) // take empty packet which is for alternate setting change
+				{
+				localTail = currentTransfer->iNext;
+				}
 			break;
 			}
 		else
 			{
 			localTail = currentTransfer->iNext;
 	if ((localTail == (TUint)endpointHdr->iHead) || (currentTransfer->iAltSettingSeq != (iAltSettingSeq+1)&0xFFFF))
 		// if alternate setting has not changed
 		return KErrNotReady;
 	else
 		{
 		iNewAltSetting=currentTransfer->iAltSetting;
 		return KErrNone;
 		}
 }
 	if (iOutState)
 		return iOutState;
 	TUsbcScTransferHeader* currentTransfer;
 	TInt r;
+	TInt aBilTail;
 	do // until we have a transfer with data.
 		{
 		iEndpointHdr->iTail = iEndpointHdr->iBilTail;
 		if(iEndpointHdr->iBilTail == iEndpointHdr->iHead)  //If no new data, create request
 			{
 			r = iClient->ReadDataNotify(iBufferNum,aStatus);
 			if (r!=KErrCompletion)  // Data could arrive since we checked.
 				return r;
 			}
 		currentTransfer = (TUsbcScTransferHeader*) (iBaseAddr + iEndpointHdr->iBilTail);
+		aBilTail = iEndpointHdr->iBilTail;
 		iEndpointHdr->iBilTail = currentTransfer->iNext;
 		aZLP = (currentTransfer->iFlags & KUsbcScShortPacket)!=EFalse;
+		if(currentTransfer->iAltSettingSeq != (iClient->iAltSettingSeq))  // if alternate setting has changed
+			{
+			if (currentTransfer->iAltSettingSeq == (iClient->iAltSettingSeq+1))	   //Note- KIS ATM, if multiple alternate setting changes happen
+				{
+				iClient->iNewAltSetting = currentTransfer->iAltSetting; //before StartNextOutAlternateSetting is called,
+																	   //this variable will reflect the latest requested AlternateSetting
+				}
+			if (iEndpointNumber != KEp0Number)
+				{
+				iEndpointHdr->iBilTail = aBilTail;
+//				iOutState =  EEOF;
+				return KErrEof;
+				}
+			else if ((currentTransfer->iBytes==0) && (!aZLP))
+				{
+				return KErrAlternateSettingChanged;
+				}
+			}
+		}
+	while ((currentTransfer->iBytes==0) && (!aZLP)); // ignore empty transfers
+	aBuffer = currentTransfer->iData.i;
+	aSize = currentTransfer->iBytes;
+	return (currentTransfer->iFlags & KUsbcScStateChange)?KStateChange:KErrCompletion;
+	}
+EXPORT_C TInt TEndpointBuffer::TakeBuffer(TAny*& aBuffer,TUint& aSize,TBool& aZLP,TRequestStatus& aStatus,TUint aLength)
+	{
+	if (iOutState)
+		return iOutState;
+	TUsbcScTransferHeader* currentTransfer;
+	TInt r;
+	TInt aBilTail;
+	do // until we have a transfer with data.
+		{
+		if(iEndpointHdr->iBilTail == iEndpointHdr->iHead)  //If no new data, create request
+			{
+			r = iClient->ReadDataNotify(iBufferNum,aStatus);
+			if (r!=KErrCompletion)  // Data could arrive since we checked.
+				{
+				return r;
+				}
+			}
+		currentTransfer = (TUsbcScTransferHeader*) (iBaseAddr + iEndpointHdr->iBilTail);
+		aBilTail = iEndpointHdr->iBilTail;
+		iEndpointHdr->iBilTail = currentTransfer->iNext;
+		aZLP = (currentTransfer->iFlags & KUsbcScShortPacket)!=EFalse; // True if short packet else false
 		if(currentTransfer->iAltSettingSeq != (iClient->iAltSettingSeq))  // if alternate setting has changed
 			{
 			if (currentTransfer->iAltSettingSeq == (iClient->iAltSettingSeq+1))	   //Note- KIS ATM, if multiple alternate setting changes happen
 				iClient->iNewAltSetting = currentTransfer->iAltSetting; //before StartNextOutAlternateSetting is called,
 																	   //this variable will reflect the latest requested AlternateSetting
 			if (iEndpointNumber != KEp0Number)
 				{
-//				iOutState =  EEOF;
+				iEndpointHdr->iBilTail = aBilTail;
-				return KErrEof;
-				}
-			else if ((currentTransfer->iBytes==0) && (!aZLP))
-				{
-				return KErrAlternateSettingChanged;
-				}
-			}
-		}
-	while ((currentTransfer->iBytes==0) && (!aZLP)); // ignore empty transfers
-	aBuffer = currentTransfer->iData.i;
-	aSize = currentTransfer->iBytes;
-	return (currentTransfer->iFlags & KUsbcScStateChange)?KStateChange:KErrCompletion;
-	}
-EXPORT_C TInt TEndpointBuffer::TakeBuffer(TAny*& aBuffer,TUint& aSize,TBool& aZLP,TRequestStatus& aStatus,TUint aLength)
-	{
-	if (iOutState)
-		return iOutState;
-	TUsbcScTransferHeader* currentTransfer;
-	TInt r;
-	do // until we have a transfer with data.
-		{
-		if(iEndpointHdr->iBilTail == iEndpointHdr->iHead)  //If no new data, create request
-			{
-			r = iClient->ReadDataNotify(iBufferNum,aStatus);
-			if (r!=KErrCompletion)  // Data could arrive since we checked.
-				{
-				return r;
-				}
-			}
-		currentTransfer = (TUsbcScTransferHeader*) (iBaseAddr + iEndpointHdr->iBilTail);
-		iEndpointHdr->iBilTail = currentTransfer->iNext;
-		aZLP = (currentTransfer->iFlags & KUsbcScShortPacket)!=EFalse; // True if short packet else false
-		if(currentTransfer->iAltSettingSeq != (iClient->iAltSettingSeq))  // if alternate setting has changed
-			{
-			if (currentTransfer->iAltSettingSeq == (iClient->iAltSettingSeq+1))	   //Note- KIS ATM, if multiple alternate setting changes happen
-				iClient->iNewAltSetting = currentTransfer->iAltSetting; //before StartNextOutAlternateSetting is called,
-																	   //this variable will reflect the latest requested AlternateSetting
-			Expire(currentTransfer->iData.i);
-			if (iEndpointNumber != KEp0Number)
-				{
 //				iOutState = EEOF;
 				return KErrEof;
 				}
 			else if ((currentTransfer->iBytes==0) && (!aZLP))
 				{
+				Expire(currentTransfer->iData.i);
 				return KErrAlternateSettingChanged;
 				}
+			Expire(currentTransfer->iData.i);
 			}
 		if ((currentTransfer->iBytes==0) && (!aZLP)) // here , if empty transfer with alt setting information, Call expire
 			{
 	TInt currentTail = iEndpointHdr->iTail;
 	TInt prevTail = NULL;
 	TBool found = EFalse;
 	while (currentTail != iEndpointHdr->iBilTail)
 		{
 		TUsbcScTransferHeader* currentTransfer = (TUsbcScTransferHeader*) (iBaseAddr + currentTail);
 		if (currentTail == offsetToExpire)		// found which to expire
 			{
 			found = ETrue;
 			// This offset is to be expired
 			if (prevTail == NULL)
 				{
 				// The offset is at the list head
 				}
 			break;
 			}
 		prevTail = currentTail;
 		currentTail = currentTransfer->iNext;
 		}
 	return found ? KErrNone : KErrNotFound;
 	}
 EXPORT_C TInt TEndpointBuffer::WriteBuffer(TAny* aBuffer,TUint aSize,TBool aZLP,TRequestStatus& aStatus)

changeset 247	d8d70de2bd36
parent 0	a41df078684a
child 253	d37db4dcc88d