mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-27 15:12:36 +02:00
75a58f94cc
The inner write functions which handle partial write are renamed to the original name of their wrappers. The write wrappers are removed. Corresponding to flashrom svn r1211. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Tested-by: Maciej Pijanka <maciej.pijanka@gmail.com> Tested-by: Andrew Morgan <ziltro@ziltro.com> Tested-by: Idwer Vollering <vidwer@gmail.com> Acked-by: Idwer Vollering <vidwer@gmail.com> Tested-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Sean Nelson <audiohacked@gmail.com>
143 lines
3.7 KiB
C
143 lines
3.7 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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#include "chipdrivers.h"
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/* WARNING!
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This chip uses the standard JEDEC Addresses in 16-bit mode as word
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addresses. In byte mode, 0xAAA has to be used instead of 0x555 and
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0x555 instead of 0x2AA. Do *not* blindly replace with standard JEDEC
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functions. */
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/* chunksize is 1 */
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int write_m29f400bt(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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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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toggle_ready_jedec(dst);
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#if 0
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/* We only want to print something in the error case. */
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msg_cerr("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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#endif
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dst++;
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src++;
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}
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/* FIXME: Ignore errors for now. */
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return 0;
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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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msg_cdbg("%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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msg_cerr("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, unsigned int start, unsigned 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(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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msg_cerr("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_chip_m29f400bt(struct flashchip *flash, unsigned int address, unsigned int blocklen)
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{
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if ((address != 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_m29f400bt(flash);
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}
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