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https://review.coreboot.org/flashrom.git
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972cec282c
This patch removes the extremely dangerous unprotect_jedec function which is not used at all within flashrom code, and renames the misleadingly named protect_jedec function to start_program_jedec. Calls to protect_jedec after flashing are removed, because a) on LPC chips, the command sent by protoct_jedec is not even in the datasheet and b) on parallel chips, the block write command issued before already contained the software protection sequence, so software protection is definitely enabled. This patch also removes two clones of protect_jedec Background: JEDEC Software Data Protection started as an optional feature, which was disabled on the first single-voltage-flash chips. The software data protection is the need to prefix a write with a magic "write enable" command, while without write protection every write access into the chip's address space modifies flash content. This magic write enable command also tells the flash chip that the programmer obviously support sending write-enable commands and turns off the "any write modifies flash content" mode. There also exist a two-command (6 writes) sequence that disables Software Data Protection completey, which should only ever be used to prepare updating with a device that can't handle software data protection. Corresponding to flashrom svn r783. Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de> Acked-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
244 lines
6.5 KiB
C
244 lines
6.5 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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*
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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 "flash.h"
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void write_page_m29f400bt(chipaddr bios, uint8_t *src,
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chipaddr dst, 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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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0xA0, bios + 0xAAA);
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/* transfer data from source to destination */
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chip_writeb(*src, dst);
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//chip_writeb(0xF0, bios);
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//programmer_delay(5);
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toggle_ready_jedec(dst);
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printf
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("Value in the flash at address 0x%lx = %#x, want %#x\n",
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(dst - bios), chip_readb(dst), *src);
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dst++;
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src++;
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}
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}
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int probe_m29f400bt(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint8_t id1, id2;
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0x90, bios + 0xAAA);
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programmer_delay(10);
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id1 = chip_readb(bios);
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/* The data sheet says id2 is at (bios + 0x01) and id2 listed in
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* flash.h does not match. It should be possible to use JEDEC probe.
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*/
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id2 = chip_readb(bios + 0x02);
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0xF0, bios + 0xAAA);
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programmer_delay(10);
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printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == 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_m29f400bt(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0x80, bios + 0xAAA);
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0x10, bios + 0xAAA);
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programmer_delay(10);
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toggle_ready_jedec(bios);
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if (check_erased_range(flash, 0, flash->total_size * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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return 0;
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}
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int block_erase_m29f400bt(struct flashchip *flash, int start, int len)
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{
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = bios + start;
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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chip_writeb(0x80, bios + 0xAAA);
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chip_writeb(0xAA, bios + 0xAAA);
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chip_writeb(0x55, bios + 0x555);
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//chip_writeb(0x10, bios + 0xAAA);
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chip_writeb(0x30, dst);
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programmer_delay(10);
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toggle_ready_jedec(bios);
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if (check_erased_range(flash, start, len)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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return 0;
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}
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int write_m29f400bt(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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chipaddr bios = flash->virtual_memory;
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//erase_m29f400bt (flash);
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printf("Programming page:\n ");
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/*********************************
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*Pages for M29F400BT:
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* 16 0x7c000 0x7ffff TOP
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* 8 0x7a000 0x7bfff
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* 8 0x78000 0x79fff
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* 32 0x70000 0x77fff
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* 64 0x60000 0x6ffff
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* 64 0x50000 0x5ffff
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* 64 0x40000 0x4ffff
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*---------------------------------
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* 64 0x30000 0x3ffff
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* 64 0x20000 0x2ffff
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* 64 0x10000 0x1ffff
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* 64 0x00000 0x0ffff BOTTOM
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*********************************/
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printf("total_size/page_size = %d\n", total_size / page_size);
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for (i = 0; i < (total_size / page_size) - 1; i++) {
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printf("%04d at address: 0x%08x\n", i, i * page_size);
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if (block_erase_m29f400bt(flash, i * page_size, page_size)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(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("%04d at address: 0x%08x\n", 7, 0x70000);
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if (block_erase_m29f400bt(flash, 0x70000, 32 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x70000, bios + 0x70000, 32 * 1024);
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printf("%04d at address: 0x%08x\n", 8, 0x78000);
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if (block_erase_m29f400bt(flash, 0x78000, 8 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x78000, bios + 0x78000, 8 * 1024);
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printf("%04d at address: 0x%08x\n", 9, 0x7a000);
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if (block_erase_m29f400bt(flash, 0x7a000, 8 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x7a000, bios + 0x7a000, 8 * 1024);
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printf("%04d at address: 0x%08x\n", 10, 0x7c000);
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if (block_erase_m29f400bt(flash, 0x7c000, 16 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x7c000, bios + 0x7c000, 16 * 1024);
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printf("\n");
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return 0;
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}
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int write_coreboot_m29f400bt(struct flashchip *flash, uint8_t *buf)
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{
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chipaddr bios = flash->virtual_memory;
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printf("Programming page:\n ");
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/*********************************
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*Pages for M29F400BT:
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* 16 0x7c000 0x7ffff TOP
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* 8 0x7a000 0x7bfff
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* 8 0x78000 0x79fff
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* 32 0x70000 0x77fff
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* 64 0x60000 0x6ffff
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* 64 0x50000 0x5ffff
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* 64 0x40000 0x4ffff
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*---------------------------------
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* 64 0x30000 0x3ffff
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* 64 0x20000 0x2ffff
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* 64 0x10000 0x1ffff
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* 64 0x00000 0x0ffff BOTTOM
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*********************************/
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printf("%04d at address: 0x%08x\n", 7, 0x00000);
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if (block_erase_m29f400bt(flash, 0x00000, 64 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x00000, bios + 0x00000, 64 * 1024);
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printf("%04d at address: 0x%08x\n", 7, 0x10000);
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if (block_erase_m29f400bt(flash, 0x10000, 64 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x10000, bios + 0x10000, 64 * 1024);
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printf("%04d at address: 0x%08x\n", 7, 0x20000);
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if (block_erase_m29f400bt(flash, 0x20000, 64 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x20000, bios + 0x20000, 64 * 1024);
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printf("%04d at address: 0x%08x\n", 7, 0x30000);
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if (block_erase_m29f400bt(flash, 0x30000, 64 * 1024)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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}
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write_page_m29f400bt(bios, buf + 0x30000, bios + 0x30000, 64 * 1024);
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printf("\n");
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return 0;
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}
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