1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2020 Grandstream Networks, Inc
4 *
5 * Authors:
6 * Carl <xjxia@grandstream.cn>
7 */
8
9 #ifndef __UBOOT__
10 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #endif
13 #include <linux/mtd/spinand.h>
14
15 #define SPINAND_MFR_ESMT 0xC8
16
17 static SPINAND_OP_VARIANTS(read_cache_variants,
18 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
19 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
20 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_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
25 static SPINAND_OP_VARIANTS(write_cache_variants,
26 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
27 SPINAND_PROG_LOAD(true, 0, NULL, 0));
28
29 static SPINAND_OP_VARIANTS(update_cache_variants,
30 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
31 SPINAND_PROG_LOAD(false, 0, NULL, 0));
32
f50lxx41x_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)33 static int f50lxx41x_ooblayout_ecc(struct mtd_info *mtd, int section,
34 struct mtd_oob_region *region)
35 {
36 if (section > 3)
37 return -ERANGE;
38
39 region->offset = (16 * section) + 8;
40 region->length = 8;
41
42 return 0;
43 }
44
f50lxx41x_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)45 static int f50lxx41x_ooblayout_free(struct mtd_info *mtd, int section,
46 struct mtd_oob_region *region)
47 {
48 if (section > 3)
49 return -ERANGE;
50
51 region->offset = (16 * section) + 2;
52 region->length = 6;
53
54 return 0;
55 }
56
57 static const struct mtd_ooblayout_ops f50lxx41x_ooblayout = {
58 .ecc = f50lxx41x_ooblayout_ecc,
59 .rfree = f50lxx41x_ooblayout_free,
60 };
61
f50l2g41ka_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)62 static int f50l2g41ka_ooblayout_ecc(struct mtd_info *mtd, int section,
63 struct mtd_oob_region *region)
64 {
65 if (section)
66 return -ERANGE;
67
68 region->offset = mtd->oobsize / 2;
69 region->length = mtd->oobsize / 2;
70
71 return 0;
72 }
73
f50l2g41ka_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)74 static int f50l2g41ka_ooblayout_free(struct mtd_info *mtd, int section,
75 struct mtd_oob_region *region)
76 {
77 if (section)
78 return -ERANGE;
79
80 region->offset = 2;
81 region->length = mtd->oobsize / 2 - 2;
82
83 return 0;
84 }
85
86 static const struct mtd_ooblayout_ops f50l2g41ka_ooblayout = {
87 .ecc = f50l2g41ka_ooblayout_ecc,
88 .rfree = f50l2g41ka_ooblayout_free,
89 };
90
91 /*
92 * ecc bits: 0xC0[4,6]
93 * [0b000], No bit errors were detected;
94 * [0b001] and [0b011], 1~6 Bit errors were detected and corrected. Not
95 * reach Flipping Bits;
96 * [0b101], Bit error count equals the bit flip
97 * detection threshold
98 * [0b010], Multiple bit errors were detected and
99 * not corrected.
100 * others, Reserved.
101 */
f50l2g41ka_ecc_ecc_get_status(struct spinand_device * spinand,u8 status)102 static int f50l2g41ka_ecc_ecc_get_status(struct spinand_device *spinand,
103 u8 status)
104 {
105 struct nand_device *nand = spinand_to_nand(spinand);
106 u8 eccsr = (status & GENMASK(6, 4)) >> 4;
107
108 if (eccsr <= 1 || eccsr == 3)
109 return eccsr;
110 else if (eccsr == 5)
111 return nand->eccreq.strength;
112 else
113 return -EBADMSG;
114 }
115
116 static const struct spinand_info esmt_spinand_table[] = {
117 SPINAND_INFO("F50L1G41LB",
118 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x01),
119 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
120 NAND_ECCREQ(1, 512),
121 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
122 &write_cache_variants,
123 &update_cache_variants),
124 0,
125 SPINAND_ECCINFO(&f50lxx41x_ooblayout, NULL)),
126 SPINAND_INFO("F50L2G41KA",
127 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x41, 0x7F),
128 NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1),
129 NAND_ECCREQ(8, 512),
130 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
131 &write_cache_variants,
132 &update_cache_variants),
133 0,
134 SPINAND_ECCINFO(&f50l2g41ka_ooblayout, f50l2g41ka_ecc_ecc_get_status)),
135 };
136
137 static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
138 };
139
140 const struct spinand_manufacturer esmt_spinand_manufacturer = {
141 .id = SPINAND_MFR_ESMT,
142 .name = "esmt",
143 .chips = esmt_spinand_table,
144 .nchips = ARRAY_SIZE(esmt_spinand_table),
145 .ops = &esmt_spinand_manuf_ops,
146 };
147