mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-27 15:12:36 +02:00
5820f42ef2
Use chipaddr instead of volatile uint8_t * because when we access chips
in external flashers, they are not accessed via pointers at all.
Benefits: This allows us to differentiate between volatile machine
memory accesses and flash chip accesses. It also enforces usage
of chip_{read,write}[bwl] to access flash chips, so nobody will
unintentionally use pointers to access chips anymore. Some unneeded
casts are removed as well. Grepping for chip operations and machine
memory operations doesn't yield any false positives anymore.
Compile tested on 32 bit and 64 bit Linux.
Corresponding to flashrom svn r519.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
72 lines
2.1 KiB
C
72 lines
2.1 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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int probe_w29ee011(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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extern char *chip_to_probe;
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if (!chip_to_probe || strcmp(chip_to_probe, "W29EE011")) {
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printf_debug("\n===\n");
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printf_debug(" Probing disabled for Winbond W29EE011 because the probing sequence puts the\n");
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printf_debug(" AMIC A49LF040A in a funky state.\n");
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printf_debug(" Use 'flashrom -c W29EE011' if you have a board with this chip.");
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printf_debug("\n===\n");
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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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myusec_delay(10);
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chip_writeb(0x55, bios + 0x2AAA);
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myusec_delay(10);
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chip_writeb(0x80, bios + 0x5555);
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myusec_delay(10);
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chip_writeb(0xAA, bios + 0x5555);
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myusec_delay(10);
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chip_writeb(0x55, bios + 0x2AAA);
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myusec_delay(10);
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chip_writeb(0x60, bios + 0x5555);
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myusec_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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myusec_delay(10);
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chip_writeb(0x55, bios + 0x2AAA);
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myusec_delay(10);
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chip_writeb(0xF0, bios + 0x5555);
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myusec_delay(10);
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printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __FUNCTION__, 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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