mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-28 07:23:43 +02:00
4e9cebb2fb
Use the correct reset sequence for 82802AB. Detailed explanation: The reset sequence before ID reading was correct, so ID always worked. But the reset sequence after ID reading was a copy-paste leftover from probe_jedec and didn't have any effect. I dug up flash_and_burn from the freebios-v1 tree and found out that 82802ab.c was indeed a copy of jedec.c with lots of experimental unannotated #if 0 and #if 1. About the wait_82802ab change: Before the patch, wait_82802ab entered read status mode, switched to ID mode, then tried an incorrect and unsupported JEDEC command to exit ID mode. Nobody ever saw that this failed because all subsequent function calls had the correct reset sequence at the beginning. With the patch, wait_82802ab enters read status mode, then switches back to read mode with the official reset command. Corresponding to flashrom svn r717. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Stefan Reinauer <stepan@coresystems.de>
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2008 Peter Stuge <peter@stuge.se>
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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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int probe_w39v040c(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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int result = probe_jedec(flash);
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uint8_t lock;
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if (!result)
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return result;
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chip_writeb(0xAA, bios + 0x5555);
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programmer_delay(10);
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chip_writeb(0x55, bios + 0x2AAA);
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programmer_delay(10);
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chip_writeb(0x90, bios + 0x5555);
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programmer_delay(10);
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lock = chip_readb(bios + 0xfff2);
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chip_writeb(0xAA, bios + 0x5555);
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programmer_delay(10);
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chip_writeb(0x55, bios + 0x2AAA);
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programmer_delay(10);
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chip_writeb(0xF0, bios + 0x5555);
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programmer_delay(40);
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printf("%s: Boot block #TBL is %slocked, rest of chip #WP is %slocked.\n",
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__func__, lock & 0x4 ? "" : "un", lock & 0x8 ? "" : "un");
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return 1;
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}
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int erase_w39v040c(struct flashchip *flash)
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{
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int i;
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unsigned int total_size = flash->total_size * 1024;
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for (i = 0; i < total_size; i += flash->page_size) {
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if (erase_sector_jedec(flash, i, flash->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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}
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return 0;
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}
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int write_w39v040c(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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if (flash->erase(flash)) {
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fprintf(stderr, "ERASE FAILED!\n");
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return -1;
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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_sector_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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return 0;
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}
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