sif_m25p64.c

umon bootloader source code, support mips cpu.

/*
*********************************************************************************************************
*                                Copyright (c) 2005 vBridge Microsystem, Inc.  
*                                      Unpublished & Not for Publication
*                                            All Rights Reserved                   
*   
* File        :                      
*                                                                         
* Description :    
*             
* Date        : Aug 11, 2005                                                           
*********************************************************************************************************
*/

#ifdef SIF_FLASH

#include "endian.h"
#include "stddefs.h"
#include "genlib.h"
#include "cpu.h"
#include "flash.h"
#include "Sif.h"
#include "Sif_M25p64.h"

/* Manufacturer and device id... */
#define INTEL_DT28F128J5		0x00890018
#define INTEL_28F640			0x00890017
#define INTEL_DT28F640J5		0x00890015
#define ST_M58LW064D		0x00200017
#define ST_M25P64			0x00202017


/*
*********************************************************************************************
*                                       SifInit
*
* Description: Initialize the serial flash interface.
*
* Arguments  : 
*
* Return     : 
*
* Note(s)    : 
*********************************************************************************************
*/
void SflashSifInit(void)
{   
    while(SifBusyRead());      // If a transaction doesn't end, 
                                            // the initialization cannot be started.

    SifTimingRegSet(SIF_SI_TIMING_RISING, SIF_SO_TIMING_RISING, SIF_CLK_POL_IDLE1, \
                    SIF_CS_WIDTH_OFF_NONE, SIF_CS_DLY_2CLK, SIF_CS_OFF_2CLK, \
                    SIF_GAP_NONE, SIF_BGAP_1BIT, 1 /* clk_div */);     
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_3BYTE, \
                  SIF_READ, 0 /* sID */, 4 /* blen */);

    SifIntrDis();                             // Disable the SIF interrupt.
}

/*
*********************************************************************************************
*                                       SflashReadByte
*
* Description: Read byte from the serial flash.
*
* Arguments  : start_addr    is the start address.
*              data          is the data pointer.
*              number        is the number to be read. Counted by bytes.
*
* Return     : none.
*
* Note(s)    : 
*********************************************************************************************
*/
void SflashReadByte(int start_addr, char *data, int number)
{   
    int i;
    
    SflashWaitTillReady();        // Wait till the internal Program, 
                                  // Erasure, & Status Register Write complete
    
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_3BYTE, \
                  SIF_READ, 0 /* sID */, 1/* blen */);
    SifCommandSet(SIF_INSTR_READ);    // Write the read instruction into the register.
    SifAddrSet(start_addr);   // Write the start address into the register.    
                              // Do not need set the address every time,
                              // because the adress register will add by blen automatically.
                              
    for(i = 0; i < number; i++) {
        SifStart();           // Start SPI operation. 
        while(SifBusyRead());
        *data++ = SifDataRead();	        
    }
}

/*
*********************************************************************************************
*                                       SflashReadWord
*
* Description: Read 4-byte from the serial flash.
*
* Arguments  : start_addr    is the start address.
*              data          is the data pointer.
*              number        is the number to be read. Counted by words.
*
* Return     : none.
*
* Note(s)    : Add on Feb 21, do not test
*********************************************************************************************
*/
void SflashReadWord(int start_addr, int *data, int number)
{   
    int i;
    
    SflashWaitTillReady();        // Wait till the internal Program, 
                                  // Erasure, & Status Register Write complete
    
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_3BYTE, \
                  SIF_READ, 0 /* sID */, 4/* blen */);
    SifCommandSet(SIF_INSTR_READ);    // Write the read instruction into the register.
    SifAddrSet(start_addr);   // Write the start address into the register.    
                              // Do not need set the address every time,
                              // because the adress register will add by blen automatically.
                              
    for(i = 0; i < number; i++) {
        SifStart();           // Start SPI operation. 
        while(SifBusyRead());
        *data++ = SifDataRead();	        
    }
}

/*
*********************************************************************************************
*                                       SflashReadStatus
*
* Description: Read the status registers.
*
* Arguments  : 
*
* Return     : none.
*
* Note(s)    : 
*********************************************************************************************
*/
char SflashReadStatus(void)
{   
    int i;
    
    while(SifBusyRead());       // If a transaction doesn't end, new one cannot be started.
                                   
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_NONE, \
                  SIF_READ, 0 /* sID */, 1 /* blen */);	
    SifCommandSet(SIF_INSTR_RDSR);            // Write the read instruction into the register.
    SifStart();                               // Start SPI operation.

    while(SifBusyRead());
    
    return(SifDataRead());	
}

/*
*********************************************************************************************
*                                       SflashProgByte
*
* Description: Program the serial flash.
*
* Arguments  : start_addr    is the start address.
*              data          is the data pointer
*              number        is the number to be programmed. Counted by bytes.                            
*
* Return     : none.
*
* Note(s)    : number does not have limited.
*********************************************************************************************
*/
void SflashProgByte(int start_addr, char *data, int number)
{
    int i;	

    while(SifBusyRead());       // If a transaction doesn't end, new one cannot be started.
    
    for(i = 0; i < number; i++) {
    	SflashWriteEn();
    
        SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_3BYTE, \
                      SIF_WRITE, 0 /* sID */, 1 /* blen */);		
        SifCommandSet(SIF_INSTR_PP);            
      
        SifAddrSet(start_addr++);       
        
        SifDataWrite(*data++);	
        SifStart();           // Start SPI operation. 
        while(SifBusyRead());
    }    
}

/*
*********************************************************************************************
*                                       SflashProgWord
*
* Description: Program the serial flash by word.
*
* Arguments  : start_addr    is the start address.
*              data          is the data pointer
*              number        is the number to be programmed. Counted by words.                            
*
* Return     : none.
*
* Note(s)    : number does not have limited.
*********************************************************************************************
*/
void SflashProgWord(int start_addr, int *data, int number)
{
    int i;	

    while(SifBusyRead());       // If a transaction doesn't end, new one cannot be started.
    
    for(i = 0; i < number; i++) {
    	SflashWriteEn();
    
        SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_3BYTE, \
                      SIF_WRITE, 0 /* sID */, 4 /* blen */);		
        SifCommandSet(SIF_INSTR_PP);            
      
        SifAddrSet(start_addr);       
        start_addr += 4;
        
        SifDataWrite(*data++);	
        SifStart();           // Start SPI operation. 
        while(SifBusyRead());
    }    
}

/*
*********************************************************************************************
*                                       SflashBulkErase
*
* Description: Erase the whole chip.
*
* Arguments  : none.
*
* Return     : none.
*
* Note(s)    : 
*********************************************************************************************
*/
void SflashBulkErase(void)
{
    SflashWriteEn();	
    
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_NONE, \
                  SIF_WRITE, 0 /* sID */, 0 /* blen */);		
    SifCommandSet(SIF_INSTR_BE);            
    SifStart();                               // Start SPI operation.
}

/*
*********************************************************************************************
*                                       SflashWriteEn
*
* Description: set the Write Enable Latch bit.
*
* Arguments  : none.
*
* Return     : none.
*
* Note(s)    : The Write Enable Latch (WEL) bit must be set prior to 
*              every Page Program (PP), Sector Erase(SE), Bulk Erase (BE) and 
*              Write Status Register(WRSR) instruction.
*********************************************************************************************
*/
void SflashWriteEn(void)
{
    SflashWaitTillReady();
    
    SifModeRegSet(SIF_CBUS_MODE, SIF_CS_n0, SIF_CTL_SEL_8BIT, SIF_ADD_SEL_NONE, \
                  SIF_WRITE, 0 /* sID */, 0 /* blen */);	
    SifCommandSet(SIF_INSTR_WREN);            
    SifStart();                               // Start SPI operation.
    
    while(!(SflashReadStatus() & 0x2));  // Wait till the WEL bit is set.    
}

/*
*********************************************************************************************
*                                       SflashWaitTillReady
*
* Description: wait till the serial flash is ready.
*
* Arguments  : none.
*
* Return     : none.
*
* Note(s)    : 
*********************************************************************************************
*/
void SflashWaitTillReady(void)