1 /*
2 * Copyright (C) 2017 Free Electrons
3 * Copyright (C) 2017 NextThing Co
4 *
5 * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18 #include <linux/mtd/rawnand.h>
19
20 /*
21 * Macronix AC series does not support using SET/GET_FEATURES to change
22 * the timings unlike what is declared in the parameter page. Unflag
23 * this feature to avoid unnecessary downturns.
24 */
macronix_nand_fix_broken_get_timings(struct nand_chip * chip)25 static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
26 {
27 unsigned int i;
28 static const char * const broken_get_timings[] = {
29 "MX30LF1G18AC",
30 "MX30LF1G28AC",
31 "MX30LF2G18AC",
32 "MX30LF2G28AC",
33 "MX30LF4G18AC",
34 "MX30LF4G28AC",
35 "MX60LF8G18AC",
36 };
37
38 if (!chip->parameters.supports_set_get_features)
39 return;
40
41 for (i = 0; i < ARRAY_SIZE(broken_get_timings); i++) {
42 if (!strcmp(broken_get_timings[i], chip->parameters.model))
43 break;
44 }
45
46 if (i == ARRAY_SIZE(broken_get_timings))
47 return;
48
49 bitmap_clear(chip->parameters.get_feature_list,
50 ONFI_FEATURE_ADDR_TIMING_MODE, 1);
51 bitmap_clear(chip->parameters.set_feature_list,
52 ONFI_FEATURE_ADDR_TIMING_MODE, 1);
53 }
54
macronix_nand_init(struct nand_chip * chip)55 static int macronix_nand_init(struct nand_chip *chip)
56 {
57 if (nand_is_slc(chip))
58 chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
59
60 macronix_nand_fix_broken_get_timings(chip);
61
62 return 0;
63 }
64
65 const struct nand_manufacturer_ops macronix_nand_manuf_ops = {
66 .init = macronix_nand_init,
67 };
68
