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af76e44752
Apart from the very bespoke case of 'probe_w29ee011()' the override 'chip_to_probe' name is a nature parameter to 'probe_flash()'. However we can deal with w29ee011 by providing a probe specific validation function to check if the chip can indeed be overriden. TEST=`./flashrom -p internal --flash-name`. Change-Id: Ifcdace07ea2135d83dea92cfa5c6bec8d7ddf05d Signed-off-by: Edward O'Callaghan <quasisec@google.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/67091 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Singer <felixsinger@posteo.net> Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
77 lines
2.3 KiB
C
77 lines
2.3 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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#include <string.h>
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#include <stdbool.h>
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#include "flash.h"
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#include "chipdrivers.h"
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bool w29ee011_can_override(const char *const chip_name, const char *const override_chip)
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{
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if (!override_chip || strcmp(override_chip, chip_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", chip_name);
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return false;
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}
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return true;
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}
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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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/* Issue JEDEC Product ID Entry command */
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chip_writeb(flash, 0xAA, bios + 0x5555);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0x55, bios + 0x2AAA);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0x80, bios + 0x5555);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0xAA, bios + 0x5555);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0x55, bios + 0x2AAA);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0x60, bios + 0x5555);
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programmer_delay(flash, 10);
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/* Read product ID */
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id1 = chip_readb(flash, bios);
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id2 = chip_readb(flash, bios + 0x01);
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/* Issue JEDEC Product ID Exit command */
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chip_writeb(flash, 0xAA, bios + 0x5555);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0x55, bios + 0x2AAA);
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programmer_delay(flash, 10);
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chip_writeb(flash, 0xF0, bios + 0x5555);
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programmer_delay(flash, 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->chip->manufacture_id && id2 == flash->chip->model_id)
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return 1;
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return 0;
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}
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