mirror of
https://review.coreboot.org/flashrom.git
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5a7cb847f0
All the driver conversion work and cleanup has been done by Stefan. flashrom.c and cli_classic.c are a joint work of Stefan and Carl-Daniel. Corresponding to flashrom svn r1579. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
116 lines
3.2 KiB
C
116 lines
3.2 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 Claus Gindhart <claus.gindhart@kontron.com>
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* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
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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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/*
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* This module is designed for supporting the devices
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* ST M50FLW040A (not yet tested)
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* ST M50FLW040B (not yet tested)
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* ST M50FLW080A
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* ST M50FLW080B (not yet tested)
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*/
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#include "flash.h"
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#include "flashchips.h"
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#include "chipdrivers.h"
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/*
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* claus.gindhart@kontron.com
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* The ST M50FLW080B and STM50FLW080B chips have to be unlocked,
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* before you can erase them or write to them.
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*/
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static int unlock_block_stm50flw0x0x(struct flashctx *flash, int offset)
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{
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chipaddr wrprotect = flash->virtual_registers + 2;
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static const uint8_t unlock_sector = 0x00;
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int j;
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/*
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* These chips have to be unlocked before you can erase them or write
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* to them. The size of the locking sectors depends on the type
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* of chip.
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*
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* Sometimes, the BIOS does this for you; so you probably
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* don't need to worry about that.
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*/
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/* Check, if it's is a top/bottom-block with 4k-sectors. */
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/* TODO: What about the other types? */
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if ((offset == 0) ||
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(offset == (flash->chip->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000))
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|| (offset == 0xF0000)) {
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// unlock each 4k-sector
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for (j = 0; j < 0x10000; j += 0x1000) {
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msg_cdbg("unlocking at 0x%x\n", offset + j);
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chip_writeb(flash, unlock_sector,
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wrprotect + offset + j);
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if (chip_readb(flash, wrprotect + offset + j) !=
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unlock_sector) {
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msg_cerr("Cannot unlock sector @ 0x%x\n",
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offset + j);
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return -1;
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}
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}
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} else {
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msg_cdbg("unlocking at 0x%x\n", offset);
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chip_writeb(flash, unlock_sector, wrprotect + offset);
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if (chip_readb(flash, wrprotect + offset) != unlock_sector) {
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msg_cerr("Cannot unlock sector @ 0x%x\n", offset);
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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 unlock_stm50flw0x0x(struct flashctx *flash)
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{
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int i;
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for (i = 0; i < flash->chip->total_size * 1024; i+= flash->chip->page_size) {
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if(unlock_block_stm50flw0x0x(flash, i)) {
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msg_cerr("UNLOCK 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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/* This function is unused. */
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int erase_sector_stm50flw0x0x(struct flashctx *flash, unsigned int sector,
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unsigned int sectorsize)
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{
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chipaddr bios = flash->virtual_memory + sector;
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// clear status register
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chip_writeb(flash, 0x50, bios);
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// now start it
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chip_writeb(flash, 0x32, bios);
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chip_writeb(flash, 0xd0, bios);
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programmer_delay(10);
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wait_82802ab(flash);
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/* FIXME: Check the status register for errors. */
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return 0;
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}
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