689c144839
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2386 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/*
|
|
* mx29f002.c: driver for MXIC MX29F002 flash models
|
|
*
|
|
*
|
|
* 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:
|
|
* MX29F002/002N data sheet
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include "flash.h"
|
|
#include "jedec.h"
|
|
#include "mx29f002.h"
|
|
#include "debug.h"
|
|
|
|
int probe_29f002(struct flashchip *flash)
|
|
{
|
|
volatile uint8_t *bios = flash->virt_addr;
|
|
uint8_t id1, id2;
|
|
|
|
*(bios + 0x5555) = 0xAA;
|
|
*(bios + 0x2AAA) = 0x55;
|
|
*(bios + 0x5555) = 0x90;
|
|
|
|
id1 = *(volatile uint8_t *) bios;
|
|
id2 = *(volatile uint8_t *) (bios + 0x01);
|
|
|
|
*bios = 0xF0;
|
|
|
|
myusec_delay(10);
|
|
|
|
printf_debug("%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_29f002(struct flashchip *flash)
|
|
{
|
|
volatile uint8_t *bios = flash->virt_addr;
|
|
|
|
*(bios + 0x555) = 0xF0;
|
|
*(bios + 0x555) = 0xAA;
|
|
*(bios + 0x2AA) = 0x55;
|
|
*(bios + 0x555) = 0x80;
|
|
*(bios + 0x555) = 0xAA;
|
|
*(bios + 0x2AA) = 0x55;
|
|
*(bios + 0x555) = 0x10;
|
|
|
|
myusec_delay(100);
|
|
toggle_ready_jedec(bios);
|
|
|
|
// while ((*bios & 0x40) != 0x40)
|
|
//;
|
|
|
|
#if 0
|
|
toggle_ready_jedec(bios);
|
|
*(bios + 0x0ffff) = 0x30;
|
|
*(bios + 0x1ffff) = 0x30;
|
|
*(bios + 0x2ffff) = 0x30;
|
|
*(bios + 0x37fff) = 0x30;
|
|
*(bios + 0x39fff) = 0x30;
|
|
*(bios + 0x3bfff) = 0x30;
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
int write_29f002(struct flashchip *flash, uint8_t *buf)
|
|
{
|
|
int i;
|
|
int total_size = flash->total_size * 1024;
|
|
volatile uint8_t *bios = flash->virt_addr;
|
|
volatile uint8_t *dst = bios;
|
|
|
|
*bios = 0xF0;
|
|
myusec_delay(10);
|
|
erase_29f002(flash);
|
|
//*bios = 0xF0;
|
|
#if 1
|
|
printf("Programming Page: ");
|
|
for (i = 0; i < total_size; i++) {
|
|
/* write to the sector */
|
|
if ((i & 0xfff) == 0)
|
|
printf("address: 0x%08lx", (unsigned long) i);
|
|
*(bios + 0x5555) = 0xAA;
|
|
*(bios + 0x2AAA) = 0x55;
|
|
*(bios + 0x5555) = 0xA0;
|
|
*dst++ = *buf++;
|
|
|
|
/* wait for Toggle bit ready */
|
|
toggle_ready_jedec(dst);
|
|
|
|
if ((i & 0xfff) == 0)
|
|
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
|
|
}
|
|
#endif
|
|
printf("\n");
|
|
|
|
return (0);
|
|
}
|