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https://review.coreboot.org/flashrom.git
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b4061f61cd
Erase functions are no longer called from chip drivers and thus their internal erase verification can be moved to generic code. This also makes it easier to skip the verify step if desired and to differentiate between failed command submission and failed erase verification. Corresponding to flashrom svn r1353. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
126 lines
3.2 KiB
C
126 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) 2000 Silicon Integrated System Corporation
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* Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
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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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#include "flash.h"
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#include "chipdrivers.h"
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#define AUTO_PG_ERASE1 0x20
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#define AUTO_PG_ERASE2 0xD0
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#define AUTO_PGRM 0x10
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#define CHIP_ERASE 0x30
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#define RESET 0xFF
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#define READ_ID 0x90
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int protect_28sf040(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_readb(bios + 0x1823);
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chip_readb(bios + 0x1820);
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chip_readb(bios + 0x1822);
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chip_readb(bios + 0x0418);
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chip_readb(bios + 0x041B);
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chip_readb(bios + 0x0419);
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chip_readb(bios + 0x040A);
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return 0;
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}
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int unprotect_28sf040(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_readb(bios + 0x1823);
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chip_readb(bios + 0x1820);
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chip_readb(bios + 0x1822);
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chip_readb(bios + 0x0418);
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chip_readb(bios + 0x041B);
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chip_readb(bios + 0x0419);
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chip_readb(bios + 0x041A);
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return 0;
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}
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int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
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{
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chipaddr bios = flash->virtual_memory;
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/* This command sequence is very similar to erase_block_82802ab. */
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chip_writeb(AUTO_PG_ERASE1, bios);
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chip_writeb(AUTO_PG_ERASE2, bios + address);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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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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/* chunksize is 1 */
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int write_28sf040(struct flashchip *flash, uint8_t *src, int start, int len)
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{
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int i;
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = flash->virtual_memory + start;
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for (i = 0; i < len; i++) {
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/* transfer data from source to destination */
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if (*src == 0xFF) {
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dst++, src++;
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/* If the data is 0xFF, don't program it */
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continue;
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}
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/*issue AUTO PROGRAM command */
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chip_writeb(AUTO_PGRM, dst);
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chip_writeb(*src++, dst++);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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}
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return 0;
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}
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static int erase_28sf040(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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chip_writeb(CHIP_ERASE, bios);
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chip_writeb(CHIP_ERASE, bios);
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programmer_delay(10);
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toggle_ready_jedec(bios);
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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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int erase_chip_28sf040(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
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{
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if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
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msg_cerr("%s called with incorrect arguments\n",
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__func__);
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return -1;
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}
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return erase_28sf040(flash);
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}
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