case SDHCDSetSlotPowerState: {
        if (cbData != sizeof(CEDEVICE_POWER_STATE)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }

        PCEDEVICE_POWER_STATE pcps = (PCEDEVICE_POWER_STATE) pData;

        if (*pcps < m_cpsCurrent) {
            // Move controller to higher power state initially since
            // it will need to be powered for the slot to access
            // registers.
            SetControllerPowerState(*pcps);
        }

        status = pSlot->SlotOptionHandler(sdOption, pData, cbData);

        // Set the power state based on current conditions. Note that 
        // the slot may have gone to a state different from what was 
        // requested.
        CEDEVICE_POWER_STATE cps = DetermineRequiredControllerPowerState();
        SetControllerPowerState(cps);
        fCallSlotsHandler = FALSE;
        break;
    }

    case SDHCDGetSlotPowerState: {
        if (cbData != sizeof(CEDEVICE_POWER_STATE)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
        break;
    }

    case SDHCDWakeOnSDIOInterrupts: {
        if (cbData != sizeof(BOOL)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
        break;
    }

    case SDHCDGetSlotInfo: {
        if (cbData != sizeof(SDCARD_HC_SLOT_INFO)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
        break;
    }
    case SDHCDSetSlotInterfaceEx: {
        if (cbData != sizeof(SD_CARD_INTERFACE_EX)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
        break;
    }
    case SDHCAllocateDMABuffer: {
        if (pData==NULL || cbData != sizeof(SD_HOST_ALLOC_FREE_DMA_BUFFER)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
        break;
    }
    case SDHCFreeDMABuffer:{
        if (pData==NULL || cbData != sizeof(SD_HOST_ALLOC_FREE_DMA_BUFFER)) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
      break;
    }
    
    default:
        break;
    }

    if (SD_API_SUCCESS(status) && fCallSlotsHandler) {
        // Call the slots handler to do the real work.
        __try {
            status = pSlot->SlotOptionHandler(sdOption, pData, cbData);
        }__except (SDProcessException(GetExceptionInformation())) {
            status = SD_API_STATUS_INVALID_PARAMETER;
        }
    }

    Unlock();

    return status;
}


VOID
CSDHCBase::PowerDown(
                     )
{
    Validate();

    for (DWORD dwSlot = 0; dwSlot < m_cSlots; ++dwSlot) {
        PCSDHCSlotBase pSlot = GetSlot(dwSlot);
        pSlot->PowerDown();
    }

    CEDEVICE_POWER_STATE cps = DetermineRequiredControllerPowerState();
    SetControllerPowerState(cps);
}


VOID
CSDHCBase::PowerUp(
                   )
{
    Validate();

    for (DWORD dwSlot = 0; dwSlot < m_cSlots; ++dwSlot) {
        PCSDHCSlotBase pSlot = GetSlot(dwSlot);

        CEDEVICE_POWER_STATE cpsRequired = pSlot->GetPowerUpRequirement();
        if (cpsRequired < m_cpsCurrent) {
            // Move controller to higher power state initially since
            // it will need to be powered for the slot to access
            // registers.
            SetControllerPowerState(cpsRequired);
        }

        pSlot->PowerUp();
    }
}


VOID
CSDHCBase::PreDeinit(
                     )
{
    if (m_fRegisteredWithBusDriver) {
        if (m_fDriverShutdown == FALSE) {
            // Deregister the host controller
            SDHCDDeregisterHostController(m_pHCDContext);
        }
        // else the bus driver itself already deregistered us.

        m_fRegisteredWithBusDriver = FALSE;
    }
}


BOOL 
CSDHCBase::InitializeHardware(
                              )
{
    SETFNAME(_T("InitializeHardware"));

    DEBUGCHK(m_hBusAccess);
    DEBUGCHK(m_regDevice.IsOK());
    PREFAST_DEBUGCHK(m_pSlotInfos);
    ValidateSlotCount();

    BOOL fRet = FALSE;
    PHYSICAL_ADDRESS PortAddress;
    DWORD inIoSpace = 0;

    // Read window information
    DDKWINDOWINFO wini;
    wini.cbSize = sizeof(wini);
    DWORD dwStatus = DDKReg_GetWindowInfo(m_regDevice, &wini);
    if (dwStatus != ERROR_SUCCESS) {
        DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s Error getting window information\r\n"),
            pszFname));
        goto EXIT;
    }

    // Read ISR information
    DDKISRINFO isri;
    isri.cbSize = sizeof(isri);
    dwStatus = DDKReg_GetIsrInfo(m_regDevice, &isri);
    if (dwStatus != ERROR_SUCCESS) {
        DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s Error getting ISR information\r\n"),
            pszFname));
        goto EXIT;
    }

#ifdef SET_TI_BOARD_PCI_REG
    {
        DDKPCIINFO dpi;
        dpi.cbSize = sizeof(dpi);
        DDKReg_GetPciInfo(m_regDevice, &dpi);

        DWORD RetVal;
        PCI_SLOT_NUMBER SlotNumber;
        SlotNumber.u.AsULONG = 0;
        SlotNumber.u.bits.DeviceNumber = dpi.dwDeviceNumber;
        SlotNumber.u.bits.FunctionNumber = 1;

        HalGetBusDataByOffset( PCIConfiguration,
                               wini.dwBusNumber,
                               SlotNumber.u.AsULONG,
                               &RetVal,
                               0x84,
                               sizeof( RetVal ) );

        if (!(RetVal & 0x00200000)) {
            RetVal |= 0x00200000;
            HalSetBusDataByOffset( PCIConfiguration,
                                   wini.dwBusNumber,
                                   SlotNumber.u.AsULONG,
                                   &RetVal,
                                   0x84,
                                   sizeof( RetVal ) );
        }
    }
#endif

    // Sanity check ISR
    if (isri.dwSysintr == SYSINTR_NOP) {
        DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s No sysintr specified in registry\r\n"),
            pszFname));
                // For HSMMC driver request OAL a SYSINTR instead of ststic SYSINTR mapping, Below KernelIoControl function is called.
                if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &(isri.dwIrq), sizeof(DWORD), &(isri.dwSysintr), sizeof(DWORD), NULL))
                {
                    RETAILMSG(TRUE, (TEXT("%s IOCTL_HAL_REQUEST_SYSINTR HSMMC1 Failed \n\r"), pszFname));
                    goto EXIT;
                }
    }

    if (isri.szIsrDll[0] != 0) {
        if ( (isri.szIsrHandler[0] == 0) || (isri.dwIrq == IRQ_UNSPECIFIED) ) {
            DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s Invalid installable ISR information in registry\r\n"),
                pszFname));
            goto EXIT;
        }
    }

    m_interfaceType = (INTERFACE_TYPE) wini.dwInterfaceType;
    m_dwBusNumber = wini.dwBusNumber;

    DWORD dwSlotZeroWindow;
    dwSlotZeroWindow = DetermineFirstSlotWindow(&wini);

    DEBUGCHK(dwSlotZeroWindow < wini.dwNumMemWindows);
    DEBUGCHK( (dwSlotZeroWindow + m_cSlots) <= wini.dwNumMemWindows );

    // Use the slot zero window for the ISR
    PDEVICEWINDOW pWindowSlotZero = &wini.memWindows[dwSlotZeroWindow];
    PortAddress.LowPart = pWindowSlotZero->dwBase;
    PortAddress.HighPart = 0;

    // Install an ISR, if present
    if (isri.szIsrDll[0] != 0) {
        m_hISRHandler = LoadIntChainHandler(isri.szIsrDll, isri.szIsrHandler, 
            (BYTE) isri.dwIrq);

        if (m_hISRHandler == NULL) {
            DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s Error installing ISR\r\n"), pszFname));
            goto EXIT;
        } 
        else {
            GIISR_INFO  Info;
            DWORD       dwPhysAddr;

            fRet = BusTransBusAddrToStatic(m_hBusAccess, 
                (INTERFACE_TYPE) wini.dwInterfaceType,
                wini.dwBusNumber, PortAddress, pWindowSlotZero->dwLen,
                &inIoSpace, (PVOID *) &dwPhysAddr);
            if (fRet == FALSE) {
                DEBUGMSG(SDCARD_ZONE_ERROR,
                    (_T("%s Error translating bus address to static address\r\n"), 
                    pszFname));
                goto EXIT;
            }

            // Initialize ISR
            Info.SysIntr = isri.dwSysintr;
            Info.CheckPort = TRUE;
            Info.PortIsIO = (inIoSpace != 0);
            Info.UseMaskReg = FALSE;
            Info.PortAddr = dwPhysAddr + SDHC_SLOT_INT_STATUS;
            Info.PortSize = sizeof(USHORT);
            Info.Mask = 0xFF;

            fRet = KernelLibIoControl(m_hISRHandler, IOCTL_GIISR_INFO, &Info, 
                sizeof(Info), NULL, 0, NULL);
            if (fRet == FALSE) {
                DEBUGMSG(SDCARD_ZONE_ERROR, (_T("%s Error setting up ISR\r\n"), pszFname));
                goto EXIT;
            }
        }
    }

    m_dwSysIntr = isri.dwSysintr;
    DEBUGMSG(SDCARD_ZONE_INIT, (_T("%s IRQ 0x%X mapped to SYS_INTR 0x%X\r\n"), 
        pszFname, isri.dwIrq, m_dwSysIntr));

    const DWORD dwEndWindow = dwSlotZeroWindow + m_cSlots;

    for (DWORD dwWindow = dwSlotZeroWindow; dwWindow < dwEndWindow; ++dwWindow) {
        DEBUGCHK(dwWindow < wini.dwNumMemWindows);
        PDEVICEWINDOW pWindowSD = &wini.memWindows[dwWindow];

        DEBUGMSG(SDCARD_ZONE_INIT,
            (_T("%s Base address -> 0x%x; length -> 0x%x \r\n"),
            pszFname, pWindowSD->dwBase, pWindowSD->dwLen));

        PortAddress.LowPart = pWindowSD->dwBase;
        PortAddress.HighPart = 0;

        inIoSpace = 0;
        PVOID pvRegisters;
        DEBUGCHK(pWindowSlotZero->dwLen >= sizeof(SSDHC_REGISTERS));

        fRet = BusTransBusAddrToVirtual(m_hBusAccess, 
            (INTERFACE_TYPE) wini.dwInterfaceType,
            wini.dwBusNumber, PortAddress, pWindowSD->dwLen, &inIoSpace, 
            &pvRegisters);
        if (fRet == FALSE) {
            DEBUGMSG(SDCARD_ZONE_ERROR,
                (_T("%s error translating SD address \r\n"),
                pszFname));
            goto EXIT;
        }

        DEBUGCHK(inIoSpace == 0); // Will not work for I/O mappings.

        DWORD dwSlot = dwWindow - dwSlotZeroWindow;
        DEBUGCHK(dwSlot < m_cSlots);
        m_pSlotInfos[dwSlot].pucRegisters = (volatile UCHAR*) pvRegisters;
        m_pSlotInfos[dwSlot].dwExtraInfo = pWindowSD->dwLen;
    }

    m_fHardwareInitialized = TRUE;
    fRet = TRUE;

EXIT:
    return fRet;
}


BOOL 
CSDHCBase::DeinitializeHardware(
                                )
{
    DEBUGCHK(m_hBusAccess);
    PREFAST_DEBUGCHK(m_pSlotInfos);
    ValidateSlotCount();

    for (DWORD dwSlot = 0; dwSlot < m_cSlots; ++dwSlot) {
        PVOID pvRegisters = (PVOID) m_pSlotInfos[dwSlot].pucRegisters;
        DWORD dwLen = m_pSlotInfos[dwSlot].dwExtraInfo;
        if (pvRegisters) MmUnmapIoSpace(pvRegisters, dwLen);
    }

    if (m_hISRHandler) FreeIntChainHandler(m_hISRHandler);

    return TRUE;
}

DWORD
CSDHCBase::IST()