nfc.cpp

Microsoft WinCE 6.0 BSP FINAL release source code for use with the i.MX27ADS TO2 WCE600_FINAL_MX27_S

//------------------------------------------------------------------------------
// Copyright (C) 2006-2007, Freescale Semiconductor, Inc. All Rights Reserved.
// THIS SOURCE CODE, AND ITS USE AND DISTRIBUTION, IS SUBJECT TO THE TERMS 
// AND CONDITIONS OF THE APPLICABLE LICENSE AGREEMENT
//------------------------------------------------------------------------------
#include "bsp.h"


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


//-----------------------------------------------------------------------------
// External Variables
extern "C" PCSP_NANDFC_REGS g_pNFC;
extern "C" PCSP_PLLCRC_REGS g_pPLLCRC;


//-----------------------------------------------------------------------------
// Defines
#define NFC_CLOCK_SET_GATE_MODE(index, mode)\
  do{\
      REG32* pPCCR = &g_pPLLCRC->PCCR0;\
      if (mode)\
	  	SETREG32(&pPCCR[CRM_PCCR_INDEX(index)], CRM_PCCR_VAL(index, 1));\
      else \
	  	CLRREG32(&pPCCR[CRM_PCCR_INDEX(index)], CRM_PCCR_VAL(index, 1));\
    }while(0)




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


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


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


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


//-----------------------------------------------------------------------------
//
//  Function: NFCAlloc
//
//  This function maps the NFC peripheral, configures interupts, and
//  configures NFC DMA support.
//
//  Parameters:
//      None.
//
//  Returns:
//      Returns TRUE on success. Returns FALSE on failure.
//
//-----------------------------------------------------------------------------
BOOL NFCAlloc(VOID)
{
    // Map peripheral physical address to virtual address
    g_pNFC = (PCSP_NANDFC_REGS) OALPAtoUA(CSP_BASE_REG_PA_NANDFC);

    // Check if virtual mapping failed
    if (g_pNFC == NULL)
    {
        OALMSG(1, (_T("NFCAlloc:  MmMapIoSpace failed!\r\n")));
        return FALSE;
    }
 
    return TRUE;   
}

//-----------------------------------------------------------------------------
//
//  Function:  NFCWait
//
//  This functions waits for the pending NANDFC opeation to complete.  
//
//  Parameters:
//      bPoll
//          [in] - Ignored.  Bootloader always polls for completion.
//
//  Returns:
//      None.
//
//-----------------------------------------------------------------------------
VOID NFCWait(BOOL bPoll)
{
    while (!(INREG16(&g_pNFC->NAND_FLASH_CONFIG2) & CSP_BITFMASK(NANDFC_NAND_FLASH_CONFIG2_INT)));

    // Clear the NANDFC interrupt
    CLRREG16(&g_pNFC->NAND_FLASH_CONFIG2, 
             CSP_BITFMASK(NANDFC_NAND_FLASH_CONFIG2_INT));

}


//-----------------------------------------------------------------------------
//
//  Function:  NFCSetClock
//
//  This enables/disable clocks for the NANDFC.
//
//  Parameters:
//      bEnabled
//            [in] - TRUE for enabling the clock, FALSE for disabling the clock
//
//  Returns:
//      Returns TRUE on success. Returns FALSE on failure.
//
//-----------------------------------------------------------------------------
BOOL NFCSetClock(BOOL bEnabled)
{
	if(bEnabled)
	{
		NFC_CLOCK_SET_GATE_MODE(DDK_CLOCK_GATE_INDEX_NFG_BAUD, DDK_CLOCK_GATE_MODE_ENABLE);
	}
	else
	{
		NFC_CLOCK_SET_GATE_MODE(DDK_CLOCK_GATE_INDEX_NFG_BAUD, DDK_CLOCK_GATE_MODE_DISABLE);
	}    

      return TRUE;
}