intel.c

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//****************************************************************************
//
// INTEL.c - The intel flash function definition.
//
// Copyright (c) 2006 Cirrus Logic, Inc.
//
//****************************************************************************

#include "ep93xx.h"
#include "flash.h"
#include "intel.h"
#include <string.h>

#define Intel_compatible_MAX 3
static struct sFlashManufactureId sIntel_ManufactureId[Intel_compatible_MAX]={
	{0x0089,"'Intel"},
	{0x002c,"Micron"},
	{0x00b0,"Sharp"}
};
//****************************************************************************
// Name       : IntelFlashQuery
// Description: This routine read the flash manufactureid and deviceid.
// Return     : 0 - succuss.
//              1 - failure.
// Note(s)    :
//****************************************************************************
int IntelFlashQuery(struct FlashInfo *pInfo)
{
    volatile unsigned short *ptr16 = (volatile unsigned short *)pInfo->FlashBase;
    volatile unsigned long *ptr32 = (volatile unsigned long *)pInfo->FlashBase;
    unsigned short usByteWidth = pInfo->ByteWidth;
    int iIdx, iResult;

    if (usByteWidth == 1){

        // Query 16 bitwidth id.
        *ptr16 = CMD_READ_ID_CODES;
        pInfo->ManufactureId = *ptr16;
        pInfo->DeviceId[0]   = *(ptr16+1);
        
        // Query 16 bitwidth flash.
        *ptr16 = CMD_READ_QUERY;
        pInfo->pQuery->DeviceSize = 1 << (*(ptr16 + 0x27) & 0xFF);
        pInfo->pQuery->NumEraseBlocks = *(ptr16 + 0x2c) & 0xFFFF;

        for(iIdx = 0; iIdx < pInfo->pQuery->NumEraseBlocks; iIdx++){
            pInfo->pQuery->sBlockInfo[iIdx].blocks =
                (*(ptr16 + 0x2d + (iIdx<<2)) & 0xFFFF) + 1;
            pInfo->pQuery->sBlockInfo[iIdx].block_size =
                (((*(ptr16 + 0x30 + (iIdx<<2)) & 0xFFFF) << 8) +
                (*(ptr16 + 0x2f + (iIdx<<2)) & 0xFFFF)) << 8;
        }
        // Put the FLASH into read array mode.
        *ptr16 = CMD_READ_ARRAY;
        iResult = 0;
    } else if (usByteWidth == 2){

        // Query 32 bitwidth id.
        *ptr32 = (CMD_READ_ID_CODES << 16) | CMD_READ_ID_CODES;
        pInfo->ManufactureId = (unsigned short)(((*ptr32 >> 16) & (*ptr32)) & 0xFFFF);
        pInfo->DeviceId[0]   = (unsigned short)(*(ptr32+1));
        
        // Query 32 bitwidth flash.
        *ptr32 = (CMD_READ_QUERY << 16) | CMD_READ_QUERY;
        pInfo->pQuery->DeviceSize = 1 << (*(ptr32 + 0x27) & 0xFF);
        pInfo->pQuery->DeviceSize = pInfo->pQuery->DeviceSize *2;
        
        pInfo->pQuery->NumEraseBlocks = *(ptr32 + 0x2c) & 0xFFFF;

        for(iIdx = 0; iIdx < pInfo->pQuery->NumEraseBlocks; iIdx++){
            pInfo->pQuery->sBlockInfo[iIdx].blocks =
                (*(ptr32 + 0x2d + (iIdx<<2)) & 0xFFFF) + 1;
            pInfo->pQuery->sBlockInfo[iIdx].block_size =
                (((*(ptr32 + 0x30 + (iIdx<<2)) & 0xFFFF) << 8) +
                (*(ptr32 + 0x2f + (iIdx<<2)) & 0xFFFF)) << 8;
        }
        // Put the FLASH into read array mode.
        *ptr32 = (CMD_READ_ARRAY << 16) | CMD_READ_ARRAY;
        iResult = 0;
    } else{
        // No such parameter.
        iResult = 1;
    }

    //if(pInfo->ManufactureId == 0x0089) return 0;
    //else return 1;
    for(iIdx=0;iIdx<Intel_compatible_MAX;iIdx++)
    {
    	if(pInfo->ManufactureId == sIntel_ManufactureId[iIdx].manufacture_id) 
    	{
    	    return 0;
    	}
    }
    return 1;
}

//****************************************************************************
// Name       : IntelFlashWaitUntilForProgram
// Description: IntelFlashWaitForProgram waits until bit 7 & 23 becomes one,
//              indicating that the embedded program (be it a chip erase,
//              sector erase, or data store program) has completed executing.
// Arguments  : iOffset - the offset address.
// Return     : 0 - succuss.
//              1 - failure.
// Note(s)    :
//****************************************************************************
int IntelFlashWaitUntilForProgram(struct FlashInfo *pInfo, int timeout)
{
    volatile unsigned short *ptr16 = (volatile unsigned short *)pInfo->FlashBase;
    volatile unsigned long *ptr32 = (volatile unsigned long *)pInfo->FlashBase;
    unsigned short usByteWidth = pInfo->ByteWidth;
    int iResult = 0;

    if (usByteWidth == 1){
        unsigned short usTemp;

        // Send the Read status register command
        *ptr16 = CMD_READ_STATUS_REGISTER;

        // Read from the FLASH memory until bit 7 & 23 are one.
        while(1)
        {
            // Read the status register from the FLASH memory.
            usTemp = *ptr16;

            // Mask off all bits except for bit 7 & 23.
            usTemp &= CMD_STATUS_READY;

            // If bit 7 & 23 are one, then quit waiting.
            if(usTemp == CMD_STATUS_READY) break;
        }

        // Clear the status register.
        *ptr16 = CMD_CLEAR_STATUS_REGISTER;
        iResult=0;

    } else if (usByteWidth == 2){
        unsigned long ulTemp;

        // Send the Read status register command
        *ptr32 = (CMD_READ_STATUS_REGISTER << 16) | CMD_READ_STATUS_REGISTER;

        // Read from the FLASH memory until bit 7 & 23 are one.
        while(1)
        {
            // Read the status register from the FLASH memory.
            ulTemp = *ptr32;

            // Mask off all bits except for bit 7 & 23.
            ulTemp &= (CMD_STATUS_READY << 16) | CMD_STATUS_READY;

            // If bit 7 & 23 are one, then quit waiting.
            if(ulTemp == ((CMD_STATUS_READY << 16) | CMD_STATUS_READY)) break;
        }

        // Clear the status register.
        *ptr32 = (CMD_CLEAR_STATUS_REGISTER << 16) | CMD_CLEAR_STATUS_REGISTER;
        iResult=0;

    } else{
        // No such parameter.
        return 1;
    }

    return iResult;
}

//****************************************************************************
// Name       : IntelFlashClearLockBits
// Description: This routine erase the specified sector of intel.
// Arguments  : iOffset - the offset address.
// Return     : 0 - succuss.
//              1 - failure.
// Note(s)    :
//****************************************************************************
int IntelFlashClearLockBits(struct FlashInfo *pInfo, int iSector)
{
    volatile unsigned short *ptr16 = (volatile unsigned short *)pInfo->FlashBase;
    volatile unsigned long *ptr32 = (volatile unsigned long *)pInfo->FlashBase;
    unsigned short usByteWidth = pInfo->ByteWidth;
    int iResult = 0;
        
    if (usByteWidth == 1){
        // Put the FLASH into read array mode.
        *(ptr16 + (iSector >> 1)) = CMD_READ_ARRAY;

        // Clear the Block lock bit before attempting to erase
        // Or program C3 or J3 FLASH devices.
        *(ptr16 + (iSector >> 1)) = CMD_CONFIG_SETUP;
        *(ptr16 + (iSector >> 1)) = CMD_CONFIRM;

        // Wait until the Clear Block lock bit command has completed.
        IntelFlashWaitUntilForProgram(pInfo, 0);

        // Put the FLASH into read array mode.
        *(ptr16 + (iSector >> 1)) = CMD_READ_ARRAY;
        iResult = 0;

    } else if (usByteWidth == 2){
        // Put the FLASH into read array mode.
        *(ptr32 + (iSector >> 2)) = (CMD_READ_ARRAY << 16) | CMD_READ_ARRAY;

        // Clear the Block lock bit before attempting to erase
        // Or program C3 or J3 FLASH devices.
        *(ptr32 + (iSector >> 2)) = (CMD_CONFIG_SETUP << 16) | CMD_CONFIG_SETUP;
        *(ptr32 + (iSector >> 2)) = (CMD_CONFIRM << 16) | CMD_CONFIRM;

        // Wait until the Clear Block lock bit command has completed.
        IntelFlashWaitUntilForProgram(pInfo, 0);

        // Put the FLASH into read array mode.
        *(ptr32 + (iSector >> 2)) = (CMD_READ_ARRAY << 16) | CMD_READ_ARRAY;
        iResult = 0;
        
    } else{
        // No such parameter.
        return 1;
    }

    return iResult;

}

//****************************************************************************
// Name       : IntelFlashEraseSector
// Description: This routine erase the specified sector of intel.
// Arguments  : iOffset - the offset address.
//              len  - the length.
// Return     : 0 - succuss.
//              1 - failure.
// Note(s)    :
//****************************************************************************
int IntelFlashEraseSector(struct FlashInfo *pInfo, int iSector)
{
    volatile unsigned short *ptr16 = (volatile unsigned short *)pInfo->FlashBase;
    volatile unsigned long *ptr32 = (volatile unsigned long *)pInfo->FlashBase;
    unsigned short usByteWidth = pInfo->ByteWidth;
    int iResult = 0;

    IntelFlashClearLockBits(pInfo, iSector);

    if (usByteWidth == 1){
        // Write the erase command to the FLASH memory.
        *(ptr16 + (iSector >> 1)) = CMD_BLOCK_ERASE;
        *(ptr16 + (iSector >> 1)) = CMD_CONFIRM;

        // Wait until the sector erase has completed.
        IntelFlashWaitUntilForProgram(pInfo, 0);

        // Put the FLASH into read array mode.
        *ptr16 = CMD_READ_ARRAY;

        iResult = 0;
        
    } else if (usByteWidth == 2){
        // Write the erase command to the FLASH memory.
        *(ptr32 + (iSector >> 2)) = (CMD_BLOCK_ERASE << 16) | CMD_BLOCK_ERASE;
        *(ptr32 + (iSector >> 2)) = (CMD_CONFIRM << 16) | CMD_CONFIRM;

        // Wait until the sector erase has completed.
        IntelFlashWaitUntilForProgram(pInfo, 0);

        // Put the FLASH into read array mode.
        *ptr32 = (CMD_READ_ARRAY << 16) | CMD_READ_ARRAY;

        iResult = 0;

    } else{
        // No such parameter.
        return 1;
    }

    return iResult;

}

//****************************************************************************
// Name       : GetSectorIndex
// Description: This routine erase the sectors of intel.
// Arguments  : iOffset - the offset address.
//              len  - the length.
// Return     : 0 - succuss.
//              1 - failure.
// Note(s)    :
//****************************************************************************
int GetSectorIndex(struct FlashInfo *pInfo,int lStartAddress,
			unsigned long * pulSectorBase,int * piCurEraseRegion,
			int * piCurEraseBlock )
{
    unsigned short usByteWidth = pInfo->ByteWidth;
    int i, j;
    int iEraseBase = lStartAddress;
    
    *pulSectorBase = 0;
    if(lStartAddress==0)
    {
        *piCurEraseRegion = 0;
        *piCurEraseBlock  = 0;  
    	return 0;
    }
    
    if (usByteWidth == 1)
    {
        for(i = 0; i < pInfo->pQuery->NumEraseBlocks; i++) 
        {     
            for(j = 0; j< pInfo->pQuery->sBlockInfo[i].blocks; j++) 
            {
		
		
                
                if(iEraseBase >= pInfo->pQuery->sBlockInfo[i].block_size) 
                {
                    *pulSectorBase = *pulSectorBase + pInfo->pQuery->sBlockInfo[i].block_size;
                    iEraseBase = iEraseBase - pInfo->pQuery->sBlockInfo[i].block_size;
                } 
                else 
                {
                    *piCurEraseRegion = i;
                    *piCurEraseBlock  = j;  
                    return 0;
                }

            }