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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2007 Carl-Daniel Hailfinger
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* EN29F512 has 1C,21
* EN29F010 has 1C,20
* EN29F040A has 1C,04
* EN29LV010 has 1C,6E and uses short F0 reset sequence
* EN29LV040(A) has 1C,4F and uses short F0 reset sequence
*/
#include <stdio.h>
#include <stdint.h>
#include "flash.h"
int probe_en29f512(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
*(volatile uint8_t *)(bios + 0x555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
*(volatile uint8_t *)(bios + 0x555) = 0x90;
myusec_delay(10);
id1 = *(volatile uint8_t *)(bios + 0x100);
id2 = *(volatile uint8_t *)(bios + 0x101);
/* exit by writing F0 anywhere? or the code below */
*(volatile uint8_t *)(bios + 0x555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
*(volatile uint8_t *)(bios + 0x555) = 0xF0;
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;
}
/*
* EN29F002AT has 1C,92
* EN29F002AB has 1C,97
*/
/* This does not seem to function properly for EN29F002NT. */
int probe_en29f002a(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
*(volatile uint8_t *)(bios + 0x555) = 0xAA;
*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
*(volatile uint8_t *)(bios + 0x555) = 0x90;
myusec_delay(10);
id1 = *(volatile uint8_t *)(bios + 0x100);
id2 = *(volatile uint8_t *)(bios + 0x101);
/* exit by writing F0 anywhere? or the code below */
*(volatile uint8_t *)(bios + 0x555) = 0xAA;
*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
*(volatile uint8_t *)(bios + 0x555) = 0xF0;
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;
}
/* The EN29F002 chip needs repeated single byte writing, no block writing. */
int write_en29f002a(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024;
volatile uint8_t *bios = flash->virtual_memory;
volatile uint8_t *dst = bios;
// *bios = 0xF0;
myusec_delay(10);
erase_chip_jedec(flash);
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");
}
printf("\n");
return 0;
}
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