#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;}