1*0d6140beSAndroid Build Coastguard Worker /*
2*0d6140beSAndroid Build Coastguard Worker * This file is part of the flashrom project.
3*0d6140beSAndroid Build Coastguard Worker *
4*0d6140beSAndroid Build Coastguard Worker * Copyright (C) 2007 Markus Boas <[email protected]>
5*0d6140beSAndroid Build Coastguard Worker *
6*0d6140beSAndroid Build Coastguard Worker * This program is free software; you can redistribute it and/or modify
7*0d6140beSAndroid Build Coastguard Worker * it under the terms of the GNU General Public License as published by
8*0d6140beSAndroid Build Coastguard Worker * the Free Software Foundation; either version 2 of the License, or
9*0d6140beSAndroid Build Coastguard Worker * (at your option) any later version.
10*0d6140beSAndroid Build Coastguard Worker *
11*0d6140beSAndroid Build Coastguard Worker * This program is distributed in the hope that it will be useful,
12*0d6140beSAndroid Build Coastguard Worker * but WITHOUT ANY WARRANTY; without even the implied warranty of
13*0d6140beSAndroid Build Coastguard Worker * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14*0d6140beSAndroid Build Coastguard Worker * GNU General Public License for more details.
15*0d6140beSAndroid Build Coastguard Worker */
16*0d6140beSAndroid Build Coastguard Worker
17*0d6140beSAndroid Build Coastguard Worker #include <string.h>
18*0d6140beSAndroid Build Coastguard Worker #include <stdbool.h>
19*0d6140beSAndroid Build Coastguard Worker
20*0d6140beSAndroid Build Coastguard Worker #include "flash.h"
21*0d6140beSAndroid Build Coastguard Worker #include "chipdrivers.h"
22*0d6140beSAndroid Build Coastguard Worker
w29ee011_can_override(const char * const chip_name,const char * const override_chip)23*0d6140beSAndroid Build Coastguard Worker bool w29ee011_can_override(const char *const chip_name, const char *const override_chip)
24*0d6140beSAndroid Build Coastguard Worker {
25*0d6140beSAndroid Build Coastguard Worker if (!override_chip || strcmp(override_chip, chip_name)) {
26*0d6140beSAndroid Build Coastguard Worker msg_cdbg("Old Winbond W29* probe method disabled because "
27*0d6140beSAndroid Build Coastguard Worker "the probing sequence puts the AMIC A49LF040A in "
28*0d6140beSAndroid Build Coastguard Worker "a funky state. Use 'flashrom -c %s' if you "
29*0d6140beSAndroid Build Coastguard Worker "have a board with such a chip.\n", chip_name);
30*0d6140beSAndroid Build Coastguard Worker return false;
31*0d6140beSAndroid Build Coastguard Worker }
32*0d6140beSAndroid Build Coastguard Worker
33*0d6140beSAndroid Build Coastguard Worker return true;
34*0d6140beSAndroid Build Coastguard Worker }
35*0d6140beSAndroid Build Coastguard Worker
36*0d6140beSAndroid Build Coastguard Worker /* According to the Winbond W29EE011, W29EE012, W29C010M, W29C011A
37*0d6140beSAndroid Build Coastguard Worker * datasheets this is the only valid probe function for those chips.
38*0d6140beSAndroid Build Coastguard Worker */
probe_w29ee011(struct flashctx * flash)39*0d6140beSAndroid Build Coastguard Worker int probe_w29ee011(struct flashctx *flash)
40*0d6140beSAndroid Build Coastguard Worker {
41*0d6140beSAndroid Build Coastguard Worker chipaddr bios = flash->virtual_memory;
42*0d6140beSAndroid Build Coastguard Worker uint8_t id1, id2;
43*0d6140beSAndroid Build Coastguard Worker
44*0d6140beSAndroid Build Coastguard Worker /* Issue JEDEC Product ID Entry command */
45*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0xAA, bios + 0x5555);
46*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
47*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0x55, bios + 0x2AAA);
48*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
49*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0x80, bios + 0x5555);
50*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
51*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0xAA, bios + 0x5555);
52*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
53*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0x55, bios + 0x2AAA);
54*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
55*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0x60, bios + 0x5555);
56*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
57*0d6140beSAndroid Build Coastguard Worker
58*0d6140beSAndroid Build Coastguard Worker /* Read product ID */
59*0d6140beSAndroid Build Coastguard Worker id1 = chip_readb(flash, bios);
60*0d6140beSAndroid Build Coastguard Worker id2 = chip_readb(flash, bios + 0x01);
61*0d6140beSAndroid Build Coastguard Worker
62*0d6140beSAndroid Build Coastguard Worker /* Issue JEDEC Product ID Exit command */
63*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0xAA, bios + 0x5555);
64*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
65*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0x55, bios + 0x2AAA);
66*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
67*0d6140beSAndroid Build Coastguard Worker chip_writeb(flash, 0xF0, bios + 0x5555);
68*0d6140beSAndroid Build Coastguard Worker programmer_delay(flash, 10);
69*0d6140beSAndroid Build Coastguard Worker
70*0d6140beSAndroid Build Coastguard Worker msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
71*0d6140beSAndroid Build Coastguard Worker
72*0d6140beSAndroid Build Coastguard Worker if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id)
73*0d6140beSAndroid Build Coastguard Worker return 1;
74*0d6140beSAndroid Build Coastguard Worker
75*0d6140beSAndroid Build Coastguard Worker return 0;
76*0d6140beSAndroid Build Coastguard Worker }
77