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/*
* m29f400bt.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:
*
*/
#include "flash.h"
#include "m29f400bt.h"
#include "debug.h"
void toggle_ready_m29f400bt(volatile uint8_t *dst)
{
unsigned int i = 0;
uint8_t tmp1, tmp2;
tmp1 = *dst & 0x40;
while (i++ < 0xFFFFFF) {
tmp2 = *dst & 0x40;
if (tmp1 == tmp2) {
break;
}
tmp1 = tmp2;
}
}
void data_polling_m29f400bt(volatile uint8_t *dst, uint8_t data)
{
unsigned int i = 0;
uint8_t tmp;
data &= 0x80;
while (i++ < 0xFFFFFF) {
tmp = *dst & 0x80;
if (tmp == data) {
break;
}
}
}
void protect_m29f400bt(volatile uint8_t *bios)
{
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0xA0;
usleep(200);
}
void write_page_m29f400bt(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0xA0;
/* transfer data from source to destination */
*dst = *src;
//*(volatile char *) (bios) = 0xF0;
//usleep(5);
toggle_ready_m29f400bt(dst);
printf
("Value in the flash at address %p = %#x, want %#x\n",
(uint8_t *) (dst - bios), *dst, *src);
dst++;
src++;
}
}
int probe_m29f400bt(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0x90;
myusec_delay(10);
id1 = *(volatile uint8_t *)bios;
id2 = *(volatile uint8_t *)(bios + 0x02);
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 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_m29f400bt(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0x80;
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0x10;
myusec_delay(10);
toggle_ready_m29f400bt(bios);
return (0);
}
int block_erase_m29f400bt(volatile uint8_t *bios, volatile uint8_t *dst)
{
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
*(volatile uint8_t *)(bios + 0xAAA) = 0x80;
*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;
*(volatile uint8_t *)(bios + 0x555) = 0x55;
//*(volatile uint8_t *) (bios + 0xAAA) = 0x10;
*dst = 0x30;
myusec_delay(10);
toggle_ready_m29f400bt(bios);
return (0);
}
int write_m29f400bt(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile uint8_t *bios = flash->virtual_memory;
//erase_m29f400bt (flash);
printf("Programming Page:\n ");
/*********************************
*Pages for M29F400BT:
* 16 0x7c000 0x7ffff TOP
* 8 0x7a000 0x7bfff
* 8 0x78000 0x79fff
* 32 0x70000 0x77fff
* 64 0x60000 0x6ffff
* 64 0x50000 0x5ffff
* 64 0x40000 0x4ffff
*---------------------------------
* 64 0x30000 0x3ffff
* 64 0x20000 0x2ffff
* 64 0x10000 0x1ffff
* 64 0x00000 0x0ffff BOTTOM
*********************************/
printf("total_size/page_size = %d\n", total_size / page_size);
for (i = 0; i < (total_size / page_size) - 1; i++) {
printf("%04d at address: 0x%08x\n", i, i * page_size);
block_erase_m29f400bt(bios, bios + i * page_size);
write_page_m29f400bt(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("%04d at address: 0x%08x\n", 7, 0x70000);
block_erase_m29f400bt(bios, bios + 0x70000);
write_page_m29f400bt(bios, buf + 0x70000, bios + 0x70000, 32 * 1024);
printf("%04d at address: 0x%08x\n", 8, 0x78000);
block_erase_m29f400bt(bios, bios + 0x78000);
write_page_m29f400bt(bios, buf + 0x78000, bios + 0x78000, 8 * 1024);
printf("%04d at address: 0x%08x\n", 9, 0x7a000);
block_erase_m29f400bt(bios, bios + 0x7a000);
write_page_m29f400bt(bios, buf + 0x7a000, bios + 0x7a000, 8 * 1024);
printf("%04d at address: 0x%08x\n", 10, 0x7c000);
block_erase_m29f400bt(bios, bios + 0x7c000);
write_page_m29f400bt(bios, buf + 0x7c000, bios + 0x7c000, 16 * 1024);
printf("\n");
//protect_m29f400bt (bios);
return (0);
}
int write_linuxbios_m29f400bt(struct flashchip *flash, uint8_t *buf)
{
volatile uint8_t *bios = flash->virtual_memory;
printf("Programming Page:\n ");
/*********************************
*Pages for M29F400BT:
* 16 0x7c000 0x7ffff TOP
* 8 0x7a000 0x7bfff
* 8 0x78000 0x79fff
* 32 0x70000 0x77fff
* 64 0x60000 0x6ffff
* 64 0x50000 0x5ffff
* 64 0x40000 0x4ffff
*---------------------------------
* 64 0x30000 0x3ffff
* 64 0x20000 0x2ffff
* 64 0x10000 0x1ffff
* 64 0x00000 0x0ffff BOTTOM
*********************************/
printf("%04d at address: 0x%08x\n", 7, 0x00000);
block_erase_m29f400bt(bios, bios + 0x00000);
write_page_m29f400bt(bios, buf + 0x00000, bios + 0x00000, 64 * 1024);
printf("%04d at address: 0x%08x\n", 7, 0x10000);
block_erase_m29f400bt(bios, bios + 0x10000);
write_page_m29f400bt(bios, buf + 0x10000, bios + 0x10000, 64 * 1024);
printf("%04d at address: 0x%08x\n", 7, 0x20000);
block_erase_m29f400bt(bios, bios + 0x20000);
write_page_m29f400bt(bios, buf + 0x20000, bios + 0x20000, 64 * 1024);
printf("%04d at address: 0x%08x\n", 7, 0x30000);
block_erase_m29f400bt(bios, bios + 0x30000);
write_page_m29f400bt(bios, buf + 0x30000, bios + 0x30000, 64 * 1024);
printf("\n");
//protect_m29f400bt (bios);
return (0);
}
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