bspirda.c

freescale i.mx31 BSP CE5.0全部源码

//-----------------------------------------------------------------------------
//
//  Copyright (C) 2004, Motorola Inc. All Rights Reserved
//
//-----------------------------------------------------------------------------
//
//  Copyright (C) 2004, Freescale Semiconductor, Inc. All Rights Reserved
//  THIS SOURCE CODE IS CONFIDENTIAL AND PROPRIETARY AND MAY NOT
//  BE USED OR DISTRIBUTED WITHOUT THE WRITTEN PERMISSION OF
//  FREESCALE SEMICONDUCTOR, INC.
//
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
//
//  File:  bspIR.c
//
//  Provides BSP-specific configuration routines for the UART peripheral.
//
//-----------------------------------------------------------------------------
#include <windows.h>
#include "bsp.h"
#include "uart.h"

//-----------------------------------------------------------------------------
// External Functions

//-----------------------------------------------------------------------------
// External Variables

//-----------------------------------------------------------------------------
// Defines

//-----------------------------------------------------------------------------
// Types

//-----------------------------------------------------------------------------
// Global Variables

//-----------------------------------------------------------------------------
// Local Variables

//------------------------------------------------------------------------------
// Local Functions

//-----------------------------------------------------------------------------
//
// Function: BSPIrdaEnable
//
// This is a private function to enable the IRDA.
//
// Parameters:
//      bEnable
//          [in]    TRUE if enable IRDA. FALSE if disable.
//
// Returns:
//      none.
//-----------------------------------------------------------------------------
VOID BSPIrdaEnable(BOOL bEnable)
{
	PCSP_PBC_REGS pPBC;
	PHYSICAL_ADDRESS phyAddr = {BSP_BASE_REG_PA_PBC_BASE, 0};
	// Map PBC registers to virtual address space
	pPBC = (PCSP_PBC_REGS) MmMapIoSpace(phyAddr, sizeof(CSP_PBC_REGS), FALSE);
	if (pPBC == NULL)
	{
		return ;
	}

	if (bEnable)
    {
		// Enable IRDA transceiver
		OUTREG16(&pPBC->BCTRL1_CLEAR, (1 << PBC_BCTRL1_CLEAR_IREN_LSH));
    }
    else
    {
		// Disable IRDA transceiver
		OUTREG16(&pPBC->BCTRL1_SET, (1 << PBC_BCTRL1_SET_IREN_LSH));
    }
	MmUnmapIoSpace(pPBC,sizeof(CSP_PBC_REGS));
}


//-----------------------------------------------------------------------------
//
// Function: BSPIrdaSetMode
//
// This is a private function to set the IRDA mode.
//
// Parameters:
//      none.
//
// Returns:
//      none.
//-----------------------------------------------------------------------------
VOID BSPIrdaSetMode(irMode_c mode)
{
    PHYSICAL_ADDRESS phyAddr = {BSP_BASE_REG_PA_PBC_BASE, 0};
	PCSP_PBC_REGS pPBC;
	PCSP_FIRI_REG pFiriReg = NULL;

	// Map PBC registers to virtual address space
	pPBC = (PCSP_PBC_REGS) MmMapIoSpace(phyAddr, sizeof(CSP_PBC_REGS), FALSE);
	if (pPBC == NULL)
	{
		return ;
	}

	switch (mode)
    {
        case SIR_MODE:
			OUTREG16(&pPBC->BCTRL2_CLEAR, (1 << PBC_BCTRL2_IRDA_MOD_LSH));
            break;
        case MIR_MODE:
        case FIR_MODE:
			// Map FIRI peripheral physical address to virtual address
			phyAddr.QuadPart = CSP_BASE_REG_PA_FIRI;
			pFiriReg = (PCSP_FIRI_REG) MmMapIoSpace(phyAddr, sizeof(CSP_FIRI_REG), FALSE);
			if (pFiriReg == NULL)
			{
				return ;
			}
			// IrDA Mode clear 
			OUTREG16(&pPBC->BCTRL2_SET, (1 << PBC_BCTRL2_IRDA_MOD_LSH));
			// Invert TPP bit
			OUTREG32(&pFiriReg->FIRI_TCR, 
				CSP_BITFVAL(FIRI_TCR_TPP, FIRI_TCR_TPP_INVERT));
			// Set the Mode according to the IRDA_TXD
			OUTREG16(&pPBC->BCTRL2_CLEAR, (1 << PBC_BCTRL2_IRDA_MOD_LSH));
			// Invert the polarity back to original
			OUTREG32(&pFiriReg->FIRI_TCR, 
				CSP_BITFVAL(FIRI_TCR_TPP, FIRI_TCR_TPP_NO_INVERT));
			MmUnmapIoSpace(pFiriReg,sizeof(PCSP_FIRI_REG));
            break;
    }

	MmUnmapIoSpace(pPBC,sizeof(CSP_PBC_REGS));
    return;
}