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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2006 Giampiero Giancipoli <gianci@email.it>
* Copyright (C) 2006 coresystems GmbH <info@coresystems.de>
* 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
*/
#include <stdio.h>
#include <stdint.h>
#include "flash.h"
#define MAX_REFLASH_TRIES 0x10
/* Check one byte for odd parity */
uint8_t oddparity(uint8_t val)
{
val = (val ^ (val >> 4)) & 0xf;
val = (val ^ (val >> 2)) & 0x3;
return (val ^ (val >> 1)) & 0x1;
}
void toggle_ready_jedec(volatile uint8_t *dst)
{
unsigned int i = 0;
uint8_t tmp1, tmp2;
tmp1 = *dst & 0x40;
while (i++ < 0xFFFFFFF) {
tmp2 = *dst & 0x40;
if (tmp1 == tmp2) {
break;
}
tmp1 = tmp2;
}
}
void data_polling_jedec(volatile uint8_t *dst, uint8_t data)
{
unsigned int i = 0;
uint8_t tmp;
data &= 0x80;
while (i++ < 0xFFFFFFF) {
tmp = *dst & 0x80;
if (tmp == data) {
break;
}
}
}
void unprotect_jedec(volatile uint8_t *bios)
{
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0x20;
usleep(200);
}
void protect_jedec(volatile uint8_t *bios)
{
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
usleep(200);
}
int probe_jedec(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
uint8_t id1, id2;
uint32_t largeid1, largeid2;
/* Issue JEDEC Product ID Entry command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x90;
/* Older chips may need up to 100 us to respond. The ATMEL 29C020
* needs 10 ms according to the data sheet, but it has been tested
* to work reliably with 20 us. Allow a factor of 2 safety margin.
*/
myusec_delay(40);
/* Read product ID */
id1 = *(volatile uint8_t *)bios;
id2 = *(volatile uint8_t *)(bios + 0x01);
largeid1 = id1;
largeid2 = id2;
/* Check if it is a continuation ID, this should be a while loop. */
if (id1 == 0x7F) {
largeid1 <<= 8;
id1 = *(volatile uint8_t *)(bios + 0x100);
largeid1 |= id1;
}
if (id2 == 0x7F) {
largeid2 <<= 8;
id2 = *(volatile uint8_t *)(bios + 0x101);
largeid2 |= id2;
}
/* Issue JEDEC Product ID Exit command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
myusec_delay(40);
printf_debug("%s: id1 0x%x, id2 0x%x", __FUNCTION__, largeid1, largeid2);
if (!oddparity(id1))
printf_debug(", id1 parity violation");
printf_debug("\n");
if (largeid1 == flash->manufacture_id && largeid2 == flash->model_id)
return 1;
return 0;
}
int erase_sector_jedec(volatile uint8_t *bios, unsigned int page)
{
/* Issue the Sector Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + page) = 0x30;
myusec_delay(10);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
return 0;
}
int erase_block_jedec(volatile uint8_t *bios, unsigned int block)
{
/* Issue the Sector Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + block) = 0x50;
myusec_delay(10);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
return 0;
}
int erase_chip_jedec(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virtual_memory;
/* Issue the JEDEC Chip Erase command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x80;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
myusec_delay(10);
*(volatile uint8_t *)(bios + 0x5555) = 0x10;
myusec_delay(10);
toggle_ready_jedec(bios);
return 0;
}
int write_page_write_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, int page_size)
{
int i, tried = 0, start_index = 0, ok;
volatile uint8_t *d = dst;
uint8_t *s = src;
retry:
/* Issue JEDEC Data Unprotect comand */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
for (i = start_index; i < page_size; i++) {
/* If the data is 0xFF, don't program it */
if (*src != 0xFF)
*dst = *src;
dst++;
src++;
}
toggle_ready_jedec(dst - 1);
dst = d;
src = s;
ok = 1;
for (i = 0; i < page_size; i++) {
if (*dst != *src) {
ok = 0;
break;
}
dst++;
src++;
}
if (!ok && tried++ < MAX_REFLASH_TRIES) {
start_index = i;
goto retry;
}
if (!ok) {
fprintf(stderr, " page %d failed!\n",
(unsigned int)(d - bios) / page_size);
}
return !ok;
}
int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst)
{
int tried = 0, ok = 1;
/* If the data is 0xFF, don't program it */
if (*src == 0xFF) {
return -1;
}
retry:
/* Issue JEDEC Byte Program command */
*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
*dst = *src;
toggle_ready_jedec(bios);
if (*dst != *src && tried++ < MAX_REFLASH_TRIES) {
goto retry;
}
if (tried >= MAX_REFLASH_TRIES)
ok = 0;
return !ok;
}
int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
volatile uint8_t *dst, unsigned int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
write_byte_program_jedec(bios, src, dst);
dst++, src++;
}
return 0;
}
int write_jedec(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_chip_jedec(flash);
// dumb check if erase was successful.
for (i = 0; i < total_size; i++) {
if (bios[i] != (uint8_t) 0xff) {
printf("ERASE FAILED @%d, val %02x!\n", i, bios[i]);
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_write_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;
}
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