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https://review.coreboot.org/flashrom.git
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63fd9026f1
Struct flashchip is used only for the flashchips array and for operations which do not access hardware, e.g. printing a list of supported flash chips. struct flashctx (flash context) contains all data available in struct flashchip, but it also contains runtime information like mapping addresses. struct flashctx is expected to grow additional members over time, a prime candidate being programmer info. struct flashctx contains all of struct flashchip with identical member layout, but struct flashctx has additional members at the end. The separation between struct flashchip/flashctx shrinks the memory requirement of the big flashchips array and allows future extension of flashctx without having to worry about bloat. Corresponding to flashrom svn r1473. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
137 lines
3.6 KiB
C
137 lines
3.6 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 flashctx *flash, uint8_t *src, unsigned int start, unsigned 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 flashctx *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 flashctx *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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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_m29f400bt(struct flashctx *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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/* FIXME: Check the status register for errors. */
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return 0;
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}
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int block_erase_chip_m29f400bt(struct flashctx *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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