99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
|
/*
|
||
|
* jedec.c: driver for programming JEDEC standard flash parts
|
||
|
*
|
||
|
*
|
||
|
* Copyright 2000 Silicon Integrated System Corporation
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License as published by
|
||
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
* (at your option) any later version.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
* GNU General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with this program; if not, write to the Free Software
|
||
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
*
|
||
|
*
|
||
|
* Reference:
|
||
|
*
|
||
|
* $Id$
|
||
|
*/
|
||
|
|
||
|
#include <stdio.h>
|
||
|
#include "flash.h"
|
||
|
#include "jedec.h"
|
||
|
|
||
|
int probe_jedec (struct flashchip * flash)
|
||
|
{
|
||
|
volatile char * bios = flash->virt_addr;
|
||
|
unsigned char id1, id2;
|
||
|
|
||
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
*(volatile char *) (bios + 0x5555) = 0x90;
|
||
|
|
||
|
myusec_delay(10);
|
||
|
|
||
|
id1 = *(volatile unsigned char *) bios;
|
||
|
id2 = *(volatile unsigned char *) (bios + 0x01);
|
||
|
|
||
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
*(volatile char *) (bios + 0x5555) = 0xF0;
|
||
|
|
||
|
myusec_delay(10);
|
||
|
|
||
|
printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
|
||
|
if (id1 == flash->manufacture_id && id2 == flash->model_id)
|
||
|
return 1;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int erase_jedec (struct flashchip * flash)
|
||
|
{
|
||
|
volatile char * bios = flash->virt_addr;
|
||
|
|
||
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
*(volatile char *) (bios + 0x5555) = 0x80;
|
||
|
|
||
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
*(volatile char *) (bios + 0x5555) = 0x10;
|
||
|
|
||
|
myusec_delay(10);
|
||
|
toggle_ready_jedec(bios);
|
||
|
|
||
|
return(0);
|
||
|
}
|
||
|
|
||
|
int write_jedec (struct flashchip * flash, unsigned char * buf)
|
||
|
{
|
||
|
int i;
|
||
|
int total_size = flash->total_size *1024, page_size = flash->page_size;
|
||
|
volatile unsigned char * bios = flash->virt_addr;
|
||
|
|
||
|
erase_jedec (flash);
|
||
|
if (*bios != (unsigned char ) 0xff) {
|
||
|
printf("ERASE FAILED\n");
|
||
|
return -1;
|
||
|
}
|
||
|
printf ("Programming Page: ");
|
||
|
for (i = 0; i < total_size/page_size; i++) {
|
||
|
printf ("%04d at address: 0x%08x", i, i * page_size);
|
||
|
write_page_jedec(bios, buf + i * page_size, bios + i * page_size,
|
||
|
page_size);
|
||
|
printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
|
||
|
}
|
||
|
printf("\n");
|
||
|
protect_jedec (bios);
|
||
|
|
||
|
return(0);
|
||
|
}
|