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 "internals.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  */
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 		"MX30UF1G18AC",
37 		"MX30UF1G16AC",
38 		"MX30UF2G18AC",
39 		"MX30UF2G16AC",
40 		"MX30UF4G18AC",
41 		"MX30UF4G16AC",
42 		"MX30UF4G28AC",
43 	};
44 
45 	if (!chip->parameters.supports_set_get_features)
46 		return;
47 
48 	for (i = 0; i < ARRAY_SIZE(broken_get_timings); i++) {
49 		if (!strcmp(broken_get_timings[i], chip->parameters.model))
50 			break;
51 	}
52 
53 	if (i == ARRAY_SIZE(broken_get_timings))
54 		return;
55 
56 	bitmap_clear(chip->parameters.get_feature_list,
57 		     ONFI_FEATURE_ADDR_TIMING_MODE, 1);
58 	bitmap_clear(chip->parameters.set_feature_list,
59 		     ONFI_FEATURE_ADDR_TIMING_MODE, 1);
60 }
61 
62 static int macronix_nand_init(struct nand_chip *chip)
63 {
64 	if (nand_is_slc(chip))
65 		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
66 
67 	macronix_nand_fix_broken_get_timings(chip);
68 
69 	return 0;
70 }
71 
72 const struct nand_manufacturer_ops macronix_nand_manuf_ops = {
73 	.init = macronix_nand_init,
74 };
75