miniport.cpp

CIRRUS 公司EP93XX系列CPU的WINCE下的BSP

)
{
    IRMiniport *        pMiniport = (IRMiniport *)hContext;
    NDIS_STATUS         status    = NDIS_STATUS_SUCCESS;

    ASSERT(lpvBuf != NULL);
    ASSERT(lpcbRead != NULL);
    ASSERT(lpcbNeeded != NULL);

    DEBUGMSG(ZONE_SETINFO,
             (TEXT("+MiniportSetInformation(0x%.8X, 0x%.8X, 0x%.8x, %d, ")
              TEXT("0x%.8X, 0x%.8X)\r\n"),
              hContext, Oid, lpvBuf, cbBuf, lpcbRead, lpcbNeeded)
             );
    
    //
    // Set defaults.
    //

    *lpcbRead   = sizeof(UINT);
    *lpcbNeeded = 0;

    switch (Oid)
    {
        //
        // Generic OIDs.
        //

        case OID_GEN_CURRENT_PACKET_FILTER:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_GEN_CURRENT_PACKET_FILTER\r\n"))); 
            break;

        case OID_GEN_CURRENT_LOOKAHEAD:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_GEN_CURRENT_LOOKAHEAD\r\n"))); 
            // This is only a suggestion from the protocol. 
            // We always indicate the entire frame at once. Ignore this.
            break;

        case OID_GEN_PROTOCOL_OPTIONS:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_GEN_PROTOCOL_OPTIONS\r\n"))); 
            // Flags to help out the miniport. Ignore.
            break;

        //
        // IrDA OIDs.
        //
        
        
        //
        // This changes the link speed after the current transmitions is performed.
        // This new link speed applies to all packets send after this call.
        //
        //  Looking at the CEPC NSC driver it seems that we don't have to create
        //  a worker thread.
        //
        case OID_IRDA_LINK_SPEED:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_IRDA_LINK_SPEED\r\n"))); 
            status = pMiniport->ChangeBaudRate( *(UINT *)lpvBuf);
            break;

        case OID_IRDA_MEDIA_BUSY:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_IRDA_MEDIA_BUSY\r\n"))); 
            pMiniport->m_fMediaBusy = FALSE;
            break;

		//
        // This API allows the IRDA driver to share the hardware with
        // the serial port.  This feature I don't currently support.
        //
        // Resources are always acquired in this driver.
        //
        case OID_IRDA_REACQUIRE_HW_RESOURCES:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_IRDA_REACQUIRE_HW_RESOURCES\r\n"))); 
			break;

        //
        // Unsupported IrDA OIDs.
        //
        case OID_IRDA_RELEASE_HW_RESOURCES:
            DEBUGMSG(ZONE_SETINFO, (TEXT("Set: OID_IRDA_REACQUIRE_HW_RESOURCES\r\n"))); 
            *lpcbRead   = 0;
            *lpcbNeeded = 0;
            status      = NDIS_STATUS_NOT_SUPPORTED;
            break;
        case OID_IRDA_RATE_SNIFF:
        case OID_IRDA_UNICAST_LIST:
        case OID_IRDA_MAX_UNICAST_LIST_SIZE:
            *lpcbRead   = 0;
            *lpcbNeeded = 0;
            status      = NDIS_STATUS_NOT_SUPPORTED;
            break;

        // Many query only OIDs -> invalid set OIDs.
        default:
            *lpcbRead   = 0;
            *lpcbNeeded = 0;
            status      = NDIS_STATUS_INVALID_OID;
            break;
    }


    DEBUGMSG(ZONE_SETINFO,
             (TEXT("-MiniportSetInformation [status = 0x%.8X, %dL]")
              TEXT(" *lpcbWritten = %d, *lpcbNeeded = %d.\r\n"),
              status, status, *lpcbRead, *lpcbNeeded)
             );

    return (status);
}
//****************************************************************************
// MiniportReset
//****************************************************************************
// Resets the miniports software/hardware state.
// 
// Arguments:
//
//    lpfAddressingReset - Points to a variable that MiniportReset sets to 
//                         TRUE if the NDIS library should call 
//                         MiniportSetInformation to restore addressing 
//                         information to the current values.
//                       
//    hContext           - Pointer to IR device context.                    
//
// Returns:
//
//    NDIS_STATUS Code.
//    
//
//
//        Success - NDIS_STATUS_SUCCESS.
//                  NDIS_STATUS_PENDING
//
//        Failure - NDIS_STATUS_NOT_RESETTABLE
//                  NDIS_STATUS_RESET_IN_PROGRESS
//                  NDIS_STATUS_SOFT_ERRORS
//                  NDIS_STATUS_HARD_ERRORS
//
NDIS_STATUS MiniportReset
(
    OUT PBOOLEAN    lpfAddressingReset,
    IN NDIS_HANDLE  hContext
)
{
    IRMiniport *  pMiniport      = (IRMiniport *)hContext;
    NDIS_STATUS status         = NDIS_STATUS_SUCCESS;
    BOOL        fRestartDevice = FALSE;
    PRX_BUFFER  pRxBuf;

    DEBUGMSG(ZONE_INIT,
             (TEXT("+MiniportReset(0x%.8X, 0x%.8X)\r\n"),
              lpfAddressingReset, hContext));
              
    //
    // Acquire the critical section.
    //              
    EnterCriticalSection( &pMiniport->m_ListCriticalSection);    
    
    //
    // Change the baud rate to 9600.
    //
    pMiniport->ChangeBaudRate(9600);
    
    //
    // Initialize the recieve buffer list.
    //
    pMiniport->m_ReceivePacketList.Reset();
              
    //
    // Clear out the list of transmit buffers.
    //
    while(pMiniport->m_SendPacketList.RemoveNextPacket());

    //
    // Get the first free item.
    //
    pRxBuf = pMiniport->m_ReceivePacketList.GetFree();
    
    //
    // Clear out the SIR state machine.
    // Set the next buffer location.
    //
    pMiniport->m_SirState.SetNextBuffer(pRxBuf);        
    pMiniport->m_SirState.ClearStats();

    //
    // Release the critical section.
    //              
    LeaveCriticalSection( &pMiniport->m_ListCriticalSection);
    DEBUGMSG(ZONE_INIT, (TEXT("-MiniportReset [0x%.8X]\r\n"), status));
    return(status);    
} 
 
 
//****************************************************************************
// MiniportSend
//****************************************************************************
// Send a packet to the serial port.
// 
// Arguments:
//
//    hContext    - Pointer to the current IR_DEVICE object.
//    
//    pNdisPacket - NDIS packet to send.
//    
//    Flags       - Any flags set by the protocol. (This is protocol specific).
//
// Returns:
//
//    NDIS_STATUS_PENDING - This is generally what we should return. We will
//                          call NdisMSendComplete when the data is actually
//                          sent.
//                          
//    NDIS_STATUS_FAILURE - The packet was invalid.                           
//
// Comments:
//
// We will need to put this write packet on a queue if there is another
// packet pending completion. 
//
 
NDIS_STATUS MiniportSend
(
    IN NDIS_HANDLE      hContext,
    IN PNDIS_PACKET     pNdisPacket,
    IN UINT             Flags 
)
{
    DEBUGMSG(ZONE_INIT,
             (TEXT("+MiniportSend(0x%.8X, 0x%.8X, 0x%.8X)\r\n"),
              (ULONG)hContext, (ULONG)pNdisPacket, (ULONG)Flags));

    ASSERT(hContext);
    ASSERT(pNdisPacket);
    IRMiniport *  pIrMiniport      = (IRMiniport *)hContext;
    
    //
    // Enter the critcal section to protect the list.
    //
    EnterCriticalSection( &pIrMiniport->m_ListCriticalSection);

    //
    // Add the Packet to the list.
    //
    pIrMiniport->m_SendPacketList.AddPendingPacket(pNdisPacket);  
    
    //
    // If there are no packets on the IR stack, set it up.
    //
    pIrMiniport->GetNextSirPacket();
    
    //
    // leave the critcal section to protect the list.
    //
    LeaveCriticalSection( &pIrMiniport->m_ListCriticalSection);

    DEBUGMSG(ZONE_INIT, (TEXT("-MiniportSend [0x%.8X]\r\n"), NDIS_STATUS_PENDING));

    return(NDIS_STATUS_PENDING);
}


//****************************************************************************
// MiniportReturnPacket
//****************************************************************************
// Protocol is returning ownership of a receive packet to the miniport.
//
// Arguments:
//
//    pMiniport - Pointer to the device context.
//    
//    pNdisPacket  - Pointer to the returned NDIS packet.
//
//

VOID MiniportReturnPacket
(
    IN NDIS_HANDLE  hMiniportAdapterContext,
    IN PNDIS_PACKET pNdisPacket
)
{

    IRMiniport *    pIrMiniport = (IRMiniport *)hMiniportAdapterContext;
    PRX_BUFFER      pRxBuf;

    DEBUGMSG(ZONE_RECV,
             (TEXT("+MiniportReturnPacket(0x%.8X, 0x%.8X)\r\n"),
              hMiniportAdapterContext, pNdisPacket)
             );
                          
    //    
    // Find buffer on pending queue.
    //
    pRxBuf = pIrMiniport->m_ReceivePacketList.RemovePendingBuffer(pNdisPacket);

    //
    // We put it on the queue, it should be there now!!
    //
    ASSERT(pRxBuf != NULL);

    //
    // Return buffer to free queue.
    //
    pIrMiniport->m_ReceivePacketList.ReturnBuffer(pRxBuf); 
    

    DEBUGMSG(ZONE_RECV, (TEXT("-MiniportReturnPacket\r\n")));

}

//****************************************************************************
// IRMiniport::ChangeBaudRate
//****************************************************************************
// This waits for all the packets to be transmitted. Then the baud rate is
// changed.
// 
//
NDIS_STATUS  IRMiniport::ChangeBaudRate( ULONG ulBaudRate)
{
//    ULONG           ulNumberOfTries;
//    BOOL            bExit;
    NDIS_STATUS     ulStatus;
    
    //
    // If we are already at the currect baud rate, just return.
    //
    if(ulBaudRate == GetCurrentBaudRate())
    {
        return NDIS_STATUS_SUCCESS;
    }
    
    //
    // Check to make sure that the baud rate is supported.
    //
    if(!BaudRateSupported(ulBaudRate))
    {
        return NDIS_STATUS_FAILURE;
    }
        
    //
    // Set the Status to the default value.
    //
    ulStatus = NDIS_STATUS_SUCCESS;

    //
    // Enter the critcal section to protect the list.
    //
    EnterCriticalSection( &m_ListCriticalSection);

    if(!m_pSIRTransmitNDisPacket)
    {
    
        //
        // Set the New Baud Rate.
        //
        ulStatus = SetHWBaudRate(ulBaudRate);
    }
    else
    {
        m_ulNextBaudRate  = ulBaudRate;        
    }        

    //
    // Leave the critcal section to protect the list.
    //
    LeaveCriticalSection( &m_ListCriticalSection);
    
    return ulStatus;
}