| 1 | /* |
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| 2 | * This file is part of the flashrom project. |
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| 3 | * |
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| 4 | * Copyright (C) 2007 Markus Boas <ryven@ryven.de> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2 of the License, or |
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| 9 | * (at your option) any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |
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| 21 | #include <string.h> |
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| 22 | #include "flash.h" |
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| 23 | |
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| 24 | /* According to the Winbond W29EE011, W29EE012, W29C010M, W29C011A |
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| 25 | * datasheets this is the only valid probe function for those chips. |
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| 26 | */ |
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| 27 | int probe_w29ee011(struct flashctx *flash) |
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| 28 | { |
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| 29 | chipaddr bios = flash->virtual_memory; |
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| 30 | uint8_t id1, id2; |
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| 31 | |
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| 32 | if (!chip_to_probe || strcmp(chip_to_probe, flash->chip->name)) { |
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| 33 | msg_cdbg("Old Winbond W29* probe method disabled because " |
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| 34 | "the probing sequence puts the AMIC A49LF040A in " |
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| 35 | "a funky state. Use 'flashrom -c %s' if you " |
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| 36 | "have a board with such a chip.\n", flash->chip->name); |
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| 37 | return 0; |
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| 38 | } |
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| 39 | |
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| 40 | /* Issue JEDEC Product ID Entry command */ |
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| 41 | chip_writeb(flash, 0xAA, bios + 0x5555); |
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| 42 | programmer_delay(10); |
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| 43 | chip_writeb(flash, 0x55, bios + 0x2AAA); |
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| 44 | programmer_delay(10); |
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| 45 | chip_writeb(flash, 0x80, bios + 0x5555); |
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| 46 | programmer_delay(10); |
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| 47 | chip_writeb(flash, 0xAA, bios + 0x5555); |
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| 48 | programmer_delay(10); |
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| 49 | chip_writeb(flash, 0x55, bios + 0x2AAA); |
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| 50 | programmer_delay(10); |
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| 51 | chip_writeb(flash, 0x60, bios + 0x5555); |
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| 52 | programmer_delay(10); |
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| 53 | |
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| 54 | /* Read product ID */ |
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| 55 | id1 = chip_readb(flash, bios); |
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| 56 | id2 = chip_readb(flash, bios + 0x01); |
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| 57 | |
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| 58 | /* Issue JEDEC Product ID Exit command */ |
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| 59 | chip_writeb(flash, 0xAA, bios + 0x5555); |
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| 60 | programmer_delay(10); |
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| 61 | chip_writeb(flash, 0x55, bios + 0x2AAA); |
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| 62 | programmer_delay(10); |
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| 63 | chip_writeb(flash, 0xF0, bios + 0x5555); |
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| 64 | programmer_delay(10); |
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| 65 | |
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| 66 | msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2); |
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| 67 | |
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| 68 | if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id) |
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| 69 | return 1; |
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| 70 | |
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| 71 | return 0; |
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| 72 | } |
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