/*

* 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

*/

#ifndef USBBATTERYCHARGINGPLUGIN_H

#define USBBATTERYCHARGINGPLUGIN_H

#include <e32base.h>

#ifdef __CHARGING_PLUGIN_TEST_CODE__

#include <dummyldd.h>

#define __D32USBC_H__ // ensure that d32usbc is ignored

#define private protected

#else

#include <d32usbc.h>

#endif

#include <cusbmanextensionplugin.h>

#include "usbbatterycharging.h"

#include "devicestatetimer.h"

#include "motgobserver.h"

class CUsbChargingReEnumerator;

// For host OTG enabled charging plug-in

#ifdef SYMBIAN_ENABLE_USB_OTG_HOST_PRIV

class CIdPinWatcher;

class COtgStateWatcher;

#endif

class CVBusWatcher;

enum TUsbBatteryChargingPanic

    {

    EUsbBatteryChargingPanicBadPluginState = 1,

    EUsbBatteryChargingPanicUnexpectedPluginState = 2,

    EUsbBatteryChargingPanicBadDeviceState = 3,

    EUsbBatteryChargingPanicBadOtgState = 4,

    EUsbBatteryChargingPanicBadVBusState = 5,

    EUsbBatteryChargingPanicBadCharingCurrentNegotiation = 6

    };

// For host OTG enabled charging plug-in

class MUsbBatteryChargingPluginInterface : public MUsbDeviceNotify,

    public MUsbChargingDeviceStateTimerObserver, public MOtgPropertiesObserver

    {

public:  // from MUsbDeviceNotify

    virtual void UsbServiceStateChange (TInt aLastError,

        TUsbServiceState aOldState, TUsbServiceState aNewState) = 0;

    virtual void UsbDeviceStateChange (TInt aLastError,

        TUsbDeviceState aOldState, TUsbDeviceState aNewState) = 0;

public: // from MUsbChargingDeviceStateTimerObserver

    virtual void DeviceStateTimeout() = 0;

public: // from MOtgPropertiesObserver

// For host OTG enabled charging plug-in

#ifdef SYMBIAN_ENABLE_USB_OTG_HOST_PRIV 

    virtual void MpsoIdPinStateChanged(TInt aValue) = 0;

    virtual void MpsoOtgStateChangedL(TUsbOtgState aNewState) = 0;

#endif    

    virtual void MpsoVBusStateChanged(TInt aNewState) = 0;

    };

class TUsbBatteryChargingPluginStateBase;

class TUsbBatteryChargingPluginStateIdle;

class TUsbBatteryChargingPluginStateCurrentNegotiating;

class TUsbBatteryChargingPluginStateBEndedCableNotPresent;

enum TUsbChargingPluginState

    {

    // The default first state of this plugin

    EPluginStateIdle = 0,

    // Start to negotiate with A device about the charging current

    // re-enumration is executed 

    EPluginStateCurrentNegotiating,

    // Negotiation failed

    EPluginStateNoValidCurrent,

    // charging is stopped for some reason, but negotiation is done already

    EPluginStateIdleNegotiated,

    // Deivce is connect with A end cable, so, no way to do a charging to itself 

    EPluginStateBEndedCableNotPresent,

    // State counter

    EPluginStateCount

    };

class CUsbBatteryChargingPlugin : public CUsbmanExtensionPlugin,

    private MUsbBatteryChargingPluginInterface 

    {

    friend class TUsbBatteryChargingPluginStateBase;

    friend class TUsbBatteryChargingPluginStateIdle;

    friend class TUsbBatteryChargingPluginStateNoValidCurrent;

    friend class TUsbBatteryChargingPluginStateCurrentNegotiating;

    friend class TUsbBatteryChargingPluginStateIdleNegotiated;

    friend class TUsbBatteryChargingPluginStateBEndedCableNotPresent;

public:

    static CUsbBatteryChargingPlugin* NewL(MUsbmanExtensionPluginObserver& aObserver);

    ~CUsbBatteryChargingPlugin();

private: // from CUsbmanExtensionPlugin

    TAny* GetInterface(TUid aUid);

private:  // from MUsbBatteryChargingPluginInterface

    // from MUsbDeviceNotify

    void UsbServiceStateChange (TInt aLastError,

        TUsbServiceState aOldState, TUsbServiceState aNewState);

    void UsbDeviceStateChange (TInt aLastError,

        TUsbDeviceState aOldState, TUsbDeviceState aNewState);

    // from MUsbChargingDeviceStateTimerObserver

    void DeviceStateTimeout();

// For host OTG enabled charging plug-in

#ifdef SYMBIAN_ENABLE_USB_OTG_HOST_PRIV 

    // from MOtgPropertiesObserver

    void MpsoIdPinStateChanged(TInt aValue);

    void MpsoOtgStateChangedL(TUsbOtgState aNewState);

#endif

    void MpsoVBusStateChanged(TInt aNewState);

private:

    CUsbBatteryChargingPlugin(MUsbmanExtensionPluginObserver& aObserver);

    void ConstructL();

    void Panic(TUsbBatteryChargingPanic aPanic);

private:

    void ReadCurrentRequestValuesL();

    void NegotiateChargingCurrent();

    void NegotiateNextCurrentValueL();

    void RequestCurrentL(TUint aMilliAmps);

    void ResetPlugin();

    void SetInitialConfigurationL();

    TBool IsUsbChargingPossible();

    void LogStateText(TUsbDeviceState aState);

    TUsbChargingPluginState SetState(TUsbChargingPluginState aState);

private: // owned

    RDevUsbcClient& iLdd;

    // More than one value will be tried by the negotiation process to 

    // aquire a as larger current value as possible for charging

    RArray<TInt> iCurrentValues;

    //value of requested current set to descriptor for negotiation

    TInt iRequestedCurrentValue;

    //index of requested value

    TInt iCurrentIndexRequested;

    //value of negotiated current

    CUsbChargingDeviceStateTimer*   iDeviceStateTimer;

    CUsbChargingReEnumerator*       iDeviceReEnumerator;

// For host OTG enabled charging plug-in

#ifdef SYMBIAN_ENABLE_USB_OTG_HOST_PRIV     

    //Outer state watchers

    COtgStateWatcher *iOtgStateWatcher;

    CIdPinWatcher *iIdPinWatcher;

    //Outer states

    TInt iIdPinState;

    TUsbOtgState iOtgState;

#endif    

    TInt iVBusState;

    CVBusWatcher *iVBusWatcher;

    TUsbDeviceState iDeviceState;

    // Plug-in States

    TUsbChargingPluginState iPluginState; // Current state machine status

    TUsbBatteryChargingPluginStateBase* iCurrentState; // Owned

    TUsbBatteryChargingPluginStateBase* iPluginStates[EPluginStateCount]; // State implementations

    };

#endif // USBBATTERYCHARGINGPLUGIN_H