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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>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2007 Markus Boas <ryven@ryven.de>
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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 <string.h>
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#include "flash.h"
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/* According to the Winbond W29EE011, W29EE012, W29C010M, W29C011A
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* datasheets this is the only valid probe function for those chips.
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*/
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int probe_w29ee011(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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if (!chip_to_probe || strcmp(chip_to_probe, flash->name)) {
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msg_cdbg("Old Winbond W29* probe method disabled because "
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"the probing sequence puts the AMIC A49LF040A in "
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"a funky state. Use 'flashrom -c %s' if you "
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"have a board with such a chip.\n", flash->name);
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return 0;
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}
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/* Issue JEDEC Product ID Entry command */
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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(0x80, bios + 0x5555);
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programmer_delay(10);
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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(0x60, bios + 0x5555);
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programmer_delay(10);
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/* Read product ID */
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id1 = chip_readb(bios);
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id2 = chip_readb(bios + 0x01);
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/* Issue JEDEC Product ID Exit command */
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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(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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