1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016-2017 Micron Technology, Inc.
4 *
5 * Authors:
6 * Peter Pan <peterpandong@micron.com>
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_MICRON 0x2c
16
17 #define MICRON_STATUS_ECC_MASK GENMASK(7, 4)
18 #define MICRON_STATUS_ECC_NO_BITFLIPS (0 << 4)
19 #define MICRON_STATUS_ECC_1TO3_BITFLIPS (1 << 4)
20 #define MICRON_STATUS_ECC_4TO6_BITFLIPS (3 << 4)
21 #define MICRON_STATUS_ECC_7TO8_BITFLIPS (5 << 4)
22
23 static SPINAND_OP_VARIANTS(read_cache_variants,
24 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
25 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
26 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
27 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
28 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
29 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
30
31 static SPINAND_OP_VARIANTS(write_cache_variants,
32 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
33 SPINAND_PROG_LOAD(true, 0, NULL, 0));
34
35 static SPINAND_OP_VARIANTS(update_cache_variants,
36 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
37 SPINAND_PROG_LOAD(false, 0, NULL, 0));
38
mt29f2g01abagd_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)39 static int mt29f2g01abagd_ooblayout_ecc(struct mtd_info *mtd, int section,
40 struct mtd_oob_region *region)
41 {
42 if (section)
43 return -ERANGE;
44
45 region->offset = 64;
46 region->length = 64;
47
48 return 0;
49 }
50
mt29f2g01abagd_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)51 static int mt29f2g01abagd_ooblayout_free(struct mtd_info *mtd, int section,
52 struct mtd_oob_region *region)
53 {
54 if (section)
55 return -ERANGE;
56
57 /* Reserve 2 bytes for the BBM. */
58 region->offset = 2;
59 region->length = 62;
60
61 return 0;
62 }
63
64 static const struct mtd_ooblayout_ops mt29f2g01abagd_ooblayout = {
65 .ecc = mt29f2g01abagd_ooblayout_ecc,
66 .rfree = mt29f2g01abagd_ooblayout_free,
67 };
68
mt29f2g01abagd_ecc_get_status(struct spinand_device * spinand,u8 status)69 static int mt29f2g01abagd_ecc_get_status(struct spinand_device *spinand,
70 u8 status)
71 {
72 switch (status & MICRON_STATUS_ECC_MASK) {
73 case STATUS_ECC_NO_BITFLIPS:
74 return 0;
75
76 case STATUS_ECC_UNCOR_ERROR:
77 return -EBADMSG;
78
79 case MICRON_STATUS_ECC_1TO3_BITFLIPS:
80 return 3;
81
82 case MICRON_STATUS_ECC_4TO6_BITFLIPS:
83 return 6;
84
85 case MICRON_STATUS_ECC_7TO8_BITFLIPS:
86 return 8;
87
88 default:
89 break;
90 }
91
92 return -EINVAL;
93 }
94
95 static const struct spinand_info micron_spinand_table[] = {
96 SPINAND_INFO("MT29F2G01ABAGD",
97 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x24),
98 NAND_MEMORG(1, 2048, 128, 64, 2048, 2, 1, 1),
99 NAND_ECCREQ(8, 512),
100 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
101 &write_cache_variants,
102 &update_cache_variants),
103 0,
104 SPINAND_ECCINFO(&mt29f2g01abagd_ooblayout,
105 mt29f2g01abagd_ecc_get_status)),
106 SPINAND_INFO("MT29F1G01ABAGD",
107 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x14),
108 NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
109 NAND_ECCREQ(8, 512),
110 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
111 &write_cache_variants,
112 &update_cache_variants),
113 0,
114 SPINAND_ECCINFO(&mt29f2g01abagd_ooblayout,
115 mt29f2g01abagd_ecc_get_status)),
116 };
117
118 static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
119 };
120
121 const struct spinand_manufacturer micron_spinand_manufacturer = {
122 .id = SPINAND_MFR_MICRON,
123 .name = "Micron",
124 .chips = micron_spinand_table,
125 .nchips = ARRAY_SIZE(micron_spinand_table),
126 .ops = µn_spinand_manuf_ops,
127 };
128