331 lines
7.8 KiB
C
331 lines
7.8 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2000 Silicon Integrated System Corporation
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* Copyright (C) 2006 Giampiero Giancipoli <gianci@email.it>
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* Copyright (C) 2006 coresystems GmbH <info@coresystems.de>
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* Copyright (C) 2007 Carl-Daniel Hailfinger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "flash.h"
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#define MAX_REFLASH_TRIES 0x10
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/* Check one byte for odd parity */
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uint8_t oddparity(uint8_t val)
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{
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val = (val ^ (val >> 4)) & 0xf;
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val = (val ^ (val >> 2)) & 0x3;
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return (val ^ (val >> 1)) & 0x1;
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}
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void toggle_ready_jedec(volatile uint8_t *dst)
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{
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unsigned int i = 0;
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uint8_t tmp1, tmp2;
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tmp1 = *dst & 0x40;
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while (i++ < 0xFFFFFFF) {
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tmp2 = *dst & 0x40;
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if (tmp1 == tmp2) {
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break;
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}
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tmp1 = tmp2;
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}
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}
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void data_polling_jedec(volatile uint8_t *dst, uint8_t data)
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{
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unsigned int i = 0;
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uint8_t tmp;
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data &= 0x80;
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while (i++ < 0xFFFFFFF) {
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tmp = *dst & 0x80;
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if (tmp == data) {
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break;
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}
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}
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}
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void unprotect_jedec(volatile uint8_t *bios)
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{
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0x20;
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usleep(200);
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}
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void protect_jedec(volatile uint8_t *bios)
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{
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
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usleep(200);
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}
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int probe_jedec(struct flashchip *flash)
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{
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volatile uint8_t *bios = flash->virtual_memory;
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uint8_t id1, id2;
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uint32_t largeid1, largeid2;
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/* Issue JEDEC Product ID Entry command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x90;
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/* Older chips may need up to 100 us to respond. The ATMEL 29C020
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* needs 10 ms according to the data sheet.
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*/
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myusec_delay(10000);
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/* Read product ID */
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id1 = *(volatile uint8_t *)bios;
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id2 = *(volatile uint8_t *)(bios + 0x01);
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largeid1 = id1;
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largeid2 = id2;
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/* Check if it is a continuation ID, this should be a while loop. */
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if (id1 == 0x7F) {
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largeid1 <<= 8;
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id1 = *(volatile uint8_t *)(bios + 0x100);
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largeid1 |= id1;
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}
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if (id2 == 0x7F) {
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largeid2 <<= 8;
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id2 = *(volatile uint8_t *)(bios + 0x101);
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largeid2 |= id2;
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}
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/* Issue JEDEC Product ID Exit command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
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myusec_delay(40);
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printf_debug("%s: id1 0x%x, id2 0x%x", __FUNCTION__, largeid1, largeid2);
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if (!oddparity(id1))
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printf_debug(", id1 parity violation");
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printf_debug("\n");
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if (largeid1 == flash->manufacture_id && largeid2 == flash->model_id)
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return 1;
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return 0;
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}
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int erase_sector_jedec(volatile uint8_t *bios, unsigned int page)
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{
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/* Issue the Sector Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + page) = 0x30;
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myusec_delay(10);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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return 0;
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}
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int erase_block_jedec(volatile uint8_t *bios, unsigned int block)
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{
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/* Issue the Sector Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + block) = 0x50;
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myusec_delay(10);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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return 0;
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}
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int erase_chip_jedec(struct flashchip *flash)
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{
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volatile uint8_t *bios = flash->virtual_memory;
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/* Issue the JEDEC Chip Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x10;
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myusec_delay(10);
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toggle_ready_jedec(bios);
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return 0;
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}
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int write_page_write_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst, int page_size)
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{
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int i, tried = 0, start_index = 0, ok;
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volatile uint8_t *d = dst;
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uint8_t *s = src;
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retry:
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/* Issue JEDEC Data Unprotect comand */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
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/* transfer data from source to destination */
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for (i = start_index; i < page_size; i++) {
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/* If the data is 0xFF, don't program it */
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if (*src != 0xFF)
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*dst = *src;
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dst++;
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src++;
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}
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toggle_ready_jedec(dst - 1);
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dst = d;
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src = s;
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ok = 1;
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for (i = 0; i < page_size; i++) {
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if (*dst != *src) {
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ok = 0;
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break;
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}
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dst++;
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src++;
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}
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if (!ok && tried++ < MAX_REFLASH_TRIES) {
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start_index = i;
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goto retry;
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}
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if (!ok) {
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fprintf(stderr, " page %d failed!\n",
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(unsigned int)(d - bios) / page_size);
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}
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return !ok;
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}
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int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst)
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{
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int tried = 0, ok = 1;
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/* If the data is 0xFF, don't program it */
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if (*src == 0xFF) {
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return -1;
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}
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retry:
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/* Issue JEDEC Byte Program command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
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/* transfer data from source to destination */
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*dst = *src;
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toggle_ready_jedec(bios);
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if (*dst != *src && tried++ < MAX_REFLASH_TRIES) {
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goto retry;
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}
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if (tried >= MAX_REFLASH_TRIES)
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ok = 0;
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return !ok;
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}
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int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst, unsigned int page_size)
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{
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int i;
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for (i = 0; i < page_size; i++) {
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write_byte_program_jedec(bios, src, dst);
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dst++, src++;
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}
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return 0;
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}
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int write_jedec(struct flashchip *flash, uint8_t *buf)
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{
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int i;
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int total_size = flash->total_size * 1024;
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int page_size = flash->page_size;
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volatile uint8_t *bios = flash->virtual_memory;
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erase_chip_jedec(flash);
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// dumb check if erase was successful.
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for (i = 0; i < total_size; i++) {
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if (bios[i] != (uint8_t) 0xff) {
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printf("ERASE FAILED @%d, val %02x!\n", i, bios[i]);
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return -1;
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}
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}
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printf("Programming page: ");
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for (i = 0; i < total_size / page_size; i++) {
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printf("%04d at address: 0x%08x", i, i * page_size);
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write_page_write_jedec(bios, buf + i * page_size,
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bios + i * page_size, page_size);
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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");
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}
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printf("\n");
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protect_jedec(bios);
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return 0;
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}
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