/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:

*

*/

/**

 @file

 @internalComponent

*/

#include <e32base.h>

#include "usbhoststack.h"

#include "fdfapi.h"

/**

Starts the server process.

*/

static TInt StartServer()

	{

	const TUidType serverUid(KNullUid, KNullUid, KUsbFdfUid);

	//

	// EPOC and EKA2 is easy, we just create a new server process. Simultaneous

	// launching of two such processes should be detected when the second one

	// attempts to create the server object, failing with KErrAlreadyExists.

	//

	RProcess server;

	TInt err = server.Create(KUsbFdfImg, KNullDesC, serverUid);

	if ( err != KErrNone )

		{

		return err;

		}

	TRequestStatus stat;

	server.Rendezvous(stat);

	if ( stat != KRequestPending )

		{

		server.Kill(0); 	// abort startup

		}

	else

		{

		server.Resume();	// logon OK - start the server

		}

	User::WaitForRequest(stat); 	// wait for start or death

	// we can't use the 'exit reason' if the server panicked as this

	// is the panic 'reason' and may be '0' which cannot be distinguished

	// from KErrNone

	err = (server.ExitType() == EExitPanic) ? KErrServerTerminated : stat.Int();

	server.Close();

	return err;

	}

EXPORT_C RUsbHostStack::RUsbHostStack()

	// these are all arbitrary initialisations

 :	iDeviceEventPckg(TDeviceEventInformation()),

	iDevmonEventPckg(0)

	{

	}

EXPORT_C TVersion RUsbHostStack::Version() const

	{

	return(TVersion(	KUsbFdfSrvMajorVersionNumber,

						KUsbFdfSrvMinorVersionNumber,

						KUsbFdfSrvBuildNumber

					)

			);

	}

EXPORT_C TInt RUsbHostStack::Connect()

	{

	TInt err = DoConnect();

	return err;

	}

/**

Connects the session, starting the server if necessary

@return Error.

*/

TInt RUsbHostStack::DoConnect()

	{

	TInt retry = 2;

	FOREVER

		{

		// Use message slots from the global pool.

		TInt err = CreateSession(KUsbFdfServerName, Version(), -1);

		if ((err != KErrNotFound) && (err != KErrServerTerminated))

			{

			return err;

			}

		if (--retry == 0)

			{

			return err;

			}

		err = StartServer();

		if ((err != KErrNone) && (err != KErrAlreadyExists))

			{

			return err;

			}

		}

	}

EXPORT_C TInt RUsbHostStack::EnableDriverLoading()

	{

	return ret;

	}

EXPORT_C void RUsbHostStack::DisableDriverLoading()

	{

	TInt ret = SendReceive(EUsbFdfSrvDisableDriverLoading);

	(void)ret;

	}

EXPORT_C void RUsbHostStack::NotifyDeviceEvent(TRequestStatus& aStat, TDeviceEventInformation& aDeviceEventInformation)

	{

	TIpcArgs args;

	iDeviceEventPckg.Set((TUint8*)&aDeviceEventInformation, sizeof(TDeviceEventInformation), sizeof(TDeviceEventInformation));

	args.Set(0, &iDeviceEventPckg);

	SendReceive(EUsbFdfSrvNotifyDeviceEvent, args, aStat);

	}

EXPORT_C void RUsbHostStack::NotifyDeviceEventCancel()

	{

	TInt ret = SendReceive(EUsbFdfSrvNotifyDeviceEventCancel);

	(void)ret;

	}

EXPORT_C void RUsbHostStack::NotifyDevmonEvent(TRequestStatus& aStat, TInt& aEvent)

	{

	TIpcArgs args;

	iDevmonEventPckg.Set((TUint8*)&aEvent, sizeof(TInt), sizeof(TInt));

	args.Set(0, &iDevmonEventPckg);

	SendReceive(EUsbFdfSrvNotifyDevmonEvent, args, aStat);

	}

EXPORT_C void RUsbHostStack::NotifyDevmonEventCancel()

	{

	TInt ret = SendReceive(EUsbFdfSrvNotifyDevmonEventCancel);

	(void)ret;

	}

EXPORT_C TInt RUsbHostStack::GetSupportedLanguages(TUint aDeviceId, RArray<TUint>& aLangIds)

	{

	aLangIds.Reset();

	TUint singleLangIdOrNumLangs = 0;

	TPckg<TUint> singleLangIdOrNumLangsBuf(singleLangIdOrNumLangs);

	TInt ret = SendReceive(EUsbFdfSrvGetSingleSupportedLanguageOrNumberOfSupportedLanguages, TIpcArgs(aDeviceId, &singleLangIdOrNumLangsBuf));

	switch ( ret )

		{

	case KErrNotFound:

		ret = KErrNotFound;

		break;

	case KErrNone:

		// The buffer is now either empty or contains the single supported language ID

		ret = CopyLangIdsToArray(aLangIds, singleLangIdOrNumLangsBuf);

		break;

	case KErrTooBig:

		{

		// The buffer now contains the number of supported languages (not 0 or 1).

		// Lang IDs are TUints.

		RBuf8 buf;

		ret = buf.Create(singleLangIdOrNumLangs * sizeof(TUint));

		if ( ret == KErrNone )

			{

			ret = SendReceive(EUsbFdfSrvGetSupportedLanguages, TIpcArgs(aDeviceId, &buf));

			if ( ret == KErrNone )

				{

				ret = CopyLangIdsToArray(aLangIds, buf);

				}

			buf.Close();

			}

		}

		break;

	default:

		// Regular failure.

		break;

		}

	return ret;

	}

TInt RUsbHostStack::CopyLangIdsToArray(RArray<TUint>& aLangIds, const TDesC8& aBuffer)

	{

	ASSERT(!(aBuffer.Size() % 4));

	const TUint numLangs = aBuffer.Size() / 4;

	TInt ret = KErrNone;

	const TUint* ptr = reinterpret_cast<const TUint*>(aBuffer.Ptr());

	for ( TUint ii = 0 ; ii < numLangs ; ++ii )

		{

		ret = aLangIds.Append(*ptr++); // increments by sizeof(TUint)

		if ( ret )

			{

			aLangIds.Reset();

			break;

			}

		}

	return ret;

	}

EXPORT_C TInt RUsbHostStack::GetManufacturerStringDescriptor(TUint aDeviceId, TUint aLangId, TName& aString)

	{

	TInt ret = SendReceive(EUsbFdfSrvGetManufacturerStringDescriptor, TIpcArgs(aDeviceId, aLangId, &aString));

	if ( !ret )

		{

	return ret;

	}

EXPORT_C TInt RUsbHostStack::GetProductStringDescriptor(TUint aDeviceId, TUint aLangId, TName& aString)

	{

	TInt ret = SendReceive(EUsbFdfSrvGetProductStringDescriptor, TIpcArgs(aDeviceId, aLangId, &aString));

	if ( !ret )

		{

		}

	return ret;

	}

EXPORT_C TInt RUsbHostStack::GetOtgDescriptor(TUint aDeviceId, TOtgDescriptor& aDescriptor)

	{

	TPckg<TOtgDescriptor> otgDescriptorPckg(aDescriptor);

	TIpcArgs args;

	args.Set(0, aDeviceId);

	args.Set(1, &otgDescriptorPckg);

	TInt ret = SendReceive(EUsbFdfSrvGetOtgDescriptor, args);

	if ( !ret )

		{

		}

	return ret;

	}

EXPORT_C TInt RUsbHostStack::__DbgFailNext(TInt aCount)

	{

#ifdef _DEBUG

	return SendReceive(EUsbFdfSrvDbgFailNext, TIpcArgs(aCount));

#else

	(void)aCount;

	return KErrNone;

#endif

	}

EXPORT_C TInt RUsbHostStack::__DbgAlloc()

	{

#ifdef _DEBUG

	return SendReceive(EUsbFdfSrvDbgAlloc);

#else

	return KErrNone;

#endif

	}