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coreboot-kgpe-d16/util/flashrom/jedec.c
Carl-Daniel Hailfinger 85acc09786 Add continuation ID support to jedec.c 
The continuation ID code does not go further than checking for IDs of
the type 0x7fXX, but does this for vendor and product ID. The current
published JEDEC spec has a list where the largest vendor ID is 7 bytes
long, but all leading bytes are 0x7f. The list will grow in the future,
and using a 64bit variable will not be enough anymore.
Besides that, it seems that the location of the ID byte after the first
continuation ID byte is very vendor specific, so we may have to revisit
that code some time in the future.

(Suggestion for a new encoding:
Use a two-byte data type for the ID, the lower byte contains the only
non-0x7f byte, the upper byte contains the number of 0x7f bytes used as
prefix, which is the bank number minus 1 the vendor ID appears in.)

Add support for EON EN29F002AT.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Corey Osgood <corey.osgood@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3030 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2007-12-31 01:49:00 +00:00

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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
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\n", __FUNCTION__, largeid1, largeid2);
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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