sst39vf160.c

liunx下通过jtag烧写flash的源代码

#include <stdio.h>
#include "s3c4510.h"
#include "SST39VF160.h"

/*----------------------------------------------------------------	
 * brief : 	check the flash Manufacturer’s ID and Device ID
 * author:	dailzh
 * param:	none
 * retval:	-1--------different
 			0---------the same
 * modify history:	
if you change the function please give the discription
-----------------------------------------------------------------*/
int sst_check_id( void )
{
    unsigned short SST_id1;
    unsigned short SST_id2;
	int  ReturnStatus;

	//soft id entry
    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_READ_ID1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_READ_ID1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_READ_ID2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_READ_ID2, IP );
	
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_READ_ID3, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_READ_ID3, IP );
	
	//prepare to read
    access_bus( HOLD, SST39_CMD_ADDRESS1, SST39_READ_ID2, IP );

	//read from bus-----Manufacturer’s ID
    access_bus( READ, 0x00000000, 0, IP );
    SST_id1 = access_bus( READ, 0x00000000, 0 , RP );
    
    //read from bus-----device ID
    access_bus( READ, 0x00000001, 0, IP );
    SST_id2 = access_bus( READ, 0x00000001, 0 , RP );

	//compare to sst39lv160
    if( SST_id1 == SST_ID && SST_id2 == SST_39VF160 )
        ReturnStatus = 0;
    else
        ReturnStatus = -1;
        
    //soft id exit
    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_READ_ID1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_READ_ID1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_READ_ID2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_READ_ID2, IP );
    
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_EXIT_READ_ID, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_EXIT_READ_ID, IP );
    
    return (ReturnStatus);
}

/*----------------------------------------------------------------	
 * brief : 	write a word to the flash
 * author:	dailzh
 * param:	addr------must a even addr(0x0~0x1ffffe)
            data------the write word
 * retval:	none
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
void sst_write_word( unsigned int addr, unsigned short data )
{

    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PGRM1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PGRM1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PGRM2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PGRM2, IP );
	
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PGRM3, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PGRM3, IP );
	
    //forth bus write cycle
    access_bus( WRITE, addr/2, data, IP );
	access_bus( SETUP, addr/2, data, IP );
	
	sst_check_toggle_ready( addr );
	
	return;
}

/*----------------------------------------------------------------	
 * brief : 	read a word on the flash
 * author:	dailzh
 * param:	addr------must a even addr(0x0~0x1ffffe)
 * retval:	the word save on the flash
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
unsigned short sst_read_word( unsigned int addr )
{
    unsigned int tmp;
    
    access_bus(READ, addr/2, 0, IP);
    tmp = access_bus(READ, addr/2, 0 , RP);
    
    return tmp;
}

/*----------------------------------------------------------------	
 * brief : 	erase one block
 * author:	dailzh
 * param:	addr------the erase block first address
 * retval:	none
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
void sst_erase_one_block( unsigned int addr )
{
    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	
	//forth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	
	//fifth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	
    //sixth bus write cycle
    access_bus( WRITE, addr, SST39_ERASE_BLOCK, IP );
	access_bus( SETUP, addr, SST39_ERASE_BLOCK, IP );
    
    sst_check_toggle_ready( addr );
    
    return;
}

/*----------------------------------------------------------------	
 * brief : 	erase one sector
 * author:	dailzh
 * param:	addr------the first address of the erased addr
 * retval:	none
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
void sst_erase_one_sector( unsigned int addr )
{
    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	
	//forth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	
	//fifth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	
    //sixth bus write cycle
    access_bus( WRITE, addr, SST39_ERASE_SECTOR, IP );
	access_bus( SETUP, addr, SST39_ERASE_SECTOR, IP );
    
    sst_check_toggle_ready( addr );
    
    return;
}
   
/*----------------------------------------------------------------	
 * brief : 	erase the whole flash
 * author:	dailzh
 * param:	none
 * retval:	none
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
void sst_erase_chip( void )
{
    //first bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1, IP );
	
	//second bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2, IP );
	
    //third bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3, IP );
	
	//forth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4, IP );
	
	//fifth bus write cycle
	access_bus( WRITE, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5, IP );
	
    //sixth bus write cycle
    access_bus( WRITE, SST39_CMD_ADDRESS1, SST39_ERASE_CHIP, IP );
	access_bus( SETUP, SST39_CMD_ADDRESS1, SST39_ERASE_CHIP, IP );
    
    sst_check_toggle_ready( 0 );
    printf( "erase ok\n" );
    return;
}

/*----------------------------------------------------------------	
 * brief : 	check the toggle bit to confirm the internal operation finished
 * author:	dailzh
 * param:	addr------flash address
 * retval:	the word save on the flash
 * modify history:	
	2003-12-3		Guo Jian 		first version
-----------------------------------------------------------------*/
void sst_check_toggle_ready( unsigned int addr )
{
    unsigned short  pre_data;
    unsigned short  cur_data;
    unsigned long   time_out = 0;

    pre_data = sst_read_word( addr );
    pre_data = pre_data & 0x4040;
    
    while( time_out < 0x7FFFFFFF ) {
        //get the current data on the bus
        cur_data = sst_read_word( addr );
        cur_data = pre_data & 0x4040;
        
        //if finished internal operation return
        if( pre_data == cur_data )
            return;
            
        pre_data = cur_data;
        time_out++;
    }
    
    printf( "time out in check toggle\n" );
    return;
}