Gitiles
Code Review Sign In
gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 89127104848cea38bac5d40e3d6973fc203e2df6 / . / drivers / mtd / nand / spi / toshiba.c
blob: 571104a5d940b352ac70ff8b60b054bd55c8d27e [file] [log] [blame]
Robert Marko89127102020-03-03 20:25:40 +0100[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2018 exceet electronics GmbH
4 * Copyright (c) 2018 Kontron Electronics GmbH
5 *
6 * Author: Frieder Schrempf <frieder.schrempf@kontron.de>
7 */
8
9#ifndef __UBOOT__
10#include <malloc.h>
11#include <linux/device.h>
12#include <linux/kernel.h>
13#endif
14#include <linux/mtd/spinand.h>
15
16#define SPINAND_MFR_TOSHIBA 0x98
17#define TOSH_STATUS_ECC_HAS_BITFLIPS_T (3 << 4)
18
19static SPINAND_OP_VARIANTS(read_cache_variants,
20 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
21 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
22 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
23 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
24
25static SPINAND_OP_VARIANTS(write_cache_variants,
26 SPINAND_PROG_LOAD(true, 0, NULL, 0));
27
28static SPINAND_OP_VARIANTS(update_cache_variants,
29 SPINAND_PROG_LOAD(false, 0, NULL, 0));
30
31static int tc58cxgxsx_ooblayout_ecc(struct mtd_info *mtd, int section,
32 struct mtd_oob_region *region)
33{
34 if (section > 0)
35 return -ERANGE;
36
37 region->offset = mtd->oobsize / 2;
38 region->length = mtd->oobsize / 2;
39
40 return 0;
41}
42
43static int tc58cxgxsx_ooblayout_free(struct mtd_info *mtd, int section,
44 struct mtd_oob_region *region)
45{
46 if (section > 0)
47 return -ERANGE;
48
49 /* 2 bytes reserved for BBM */
50 region->offset = 2;
51 region->length = (mtd->oobsize / 2) - 2;
52
53 return 0;
54}
55
56static const struct mtd_ooblayout_ops tc58cxgxsx_ooblayout = {
57 .ecc = tc58cxgxsx_ooblayout_ecc,
58 .rfree = tc58cxgxsx_ooblayout_free,
59};
60
61static int tc58cxgxsx_ecc_get_status(struct spinand_device *spinand,
62 u8 status)
63{
64 struct nand_device *nand = spinand_to_nand(spinand);
65 u8 mbf = 0;
66 struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf);
67
68 switch (status & STATUS_ECC_MASK) {
69 case STATUS_ECC_NO_BITFLIPS:
70 return 0;
71
72 case STATUS_ECC_UNCOR_ERROR:
73 return -EBADMSG;
74
75 case STATUS_ECC_HAS_BITFLIPS:
76 case TOSH_STATUS_ECC_HAS_BITFLIPS_T:
77 /*
78 * Let's try to retrieve the real maximum number of bitflips
79 * in order to avoid forcing the wear-leveling layer to move
80 * data around if it's not necessary.
81 */
82 if (spi_mem_exec_op(spinand->slave, &op))
83 return nand->eccreq.strength;
84
85 mbf >>= 4;
86
87 if (WARN_ON(mbf > nand->eccreq.strength || !mbf))
88 return nand->eccreq.strength;
89
90 return mbf;
91
92 default:
93 break;
94 }
95
96 return -EINVAL;
97}
98
99static const struct spinand_info toshiba_spinand_table[] = {
100 /* 3.3V 1Gb */
101 SPINAND_INFO("TC58CVG0S3", 0xC2,
102 NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
103 NAND_ECCREQ(8, 512),
104 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
105 &write_cache_variants,
106 &update_cache_variants),
107 0,
108 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
109 tc58cxgxsx_ecc_get_status)),
110 /* 3.3V 2Gb */
111 SPINAND_INFO("TC58CVG1S3", 0xCB,
112 NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1),
113 NAND_ECCREQ(8, 512),
114 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
115 &write_cache_variants,
116 &update_cache_variants),
117 0,
118 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
119 tc58cxgxsx_ecc_get_status)),
120 /* 3.3V 4Gb */
121 SPINAND_INFO("TC58CVG2S0", 0xCD,
122 NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1),
123 NAND_ECCREQ(8, 512),
124 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
125 &write_cache_variants,
126 &update_cache_variants),
127 0,
128 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
129 tc58cxgxsx_ecc_get_status)),
130 /* 1.8V 1Gb */
131 SPINAND_INFO("TC58CYG0S3", 0xB2,
132 NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
133 NAND_ECCREQ(8, 512),
134 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
135 &write_cache_variants,
136 &update_cache_variants),
137 0,
138 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
139 tc58cxgxsx_ecc_get_status)),
140 /* 1.8V 2Gb */
141 SPINAND_INFO("TC58CYG1S3", 0xBB,
142 NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1),
143 NAND_ECCREQ(8, 512),
144 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
145 &write_cache_variants,
146 &update_cache_variants),
147 0,
148 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
149 tc58cxgxsx_ecc_get_status)),
150 /* 1.8V 4Gb */
151 SPINAND_INFO("TC58CYG2S0", 0xBD,
152 NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1),
153 NAND_ECCREQ(8, 512),
154 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
155 &write_cache_variants,
156 &update_cache_variants),
157 0,
158 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
159 tc58cxgxsx_ecc_get_status)),
160};
161
162static int toshiba_spinand_detect(struct spinand_device *spinand)
163{
164 u8 *id = spinand->id.data;
165 int ret;
166
167 /*
168 * Toshiba SPI NAND read ID needs a dummy byte,
169 * so the first byte in id is garbage.
170 */
171 if (id[1] != SPINAND_MFR_TOSHIBA)
172 return 0;
173
174 ret = spinand_match_and_init(spinand, toshiba_spinand_table,
175 ARRAY_SIZE(toshiba_spinand_table),
176 id[2]);
177 if (ret)
178 return ret;
179
180 return 1;
181}
182
183static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = {
184 .detect = toshiba_spinand_detect,
185};
186
187const struct spinand_manufacturer toshiba_spinand_manufacturer = {
188 .id = SPINAND_MFR_TOSHIBA,
189 .name = "Toshiba",
190 .ops = &toshiba_spinand_manuf_ops,
191};