mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-26 14:42:36 +02:00
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
/*
|
|
* This file is part of the flashrom project.
|
|
*
|
|
* Copyright (C) 2007 Markus Boas <ryven@ryven.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "flash.h"
|
|
#include "chipdrivers.h"
|
|
|
|
bool w29ee011_can_override(const char *const chip_name, const char *const override_chip)
|
|
{
|
|
if (!override_chip || strcmp(override_chip, chip_name)) {
|
|
msg_cdbg("Old Winbond W29* probe method disabled because "
|
|
"the probing sequence puts the AMIC A49LF040A in "
|
|
"a funky state. Use 'flashrom -c %s' if you "
|
|
"have a board with such a chip.\n", chip_name);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* According to the Winbond W29EE011, W29EE012, W29C010M, W29C011A
|
|
* datasheets this is the only valid probe function for those chips.
|
|
*/
|
|
int probe_w29ee011(struct flashctx *flash)
|
|
{
|
|
chipaddr bios = flash->virtual_memory;
|
|
uint8_t id1, id2;
|
|
|
|
/* Issue JEDEC Product ID Entry command */
|
|
chip_writeb(flash, 0xAA, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0x55, bios + 0x2AAA);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0x80, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0xAA, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0x55, bios + 0x2AAA);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0x60, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
|
|
/* Read product ID */
|
|
id1 = chip_readb(flash, bios);
|
|
id2 = chip_readb(flash, bios + 0x01);
|
|
|
|
/* Issue JEDEC Product ID Exit command */
|
|
chip_writeb(flash, 0xAA, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0x55, bios + 0x2AAA);
|
|
programmer_delay(flash, 10);
|
|
chip_writeb(flash, 0xF0, bios + 0x5555);
|
|
programmer_delay(flash, 10);
|
|
|
|
msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
|
|
|
|
if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|