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git01.mediatek.com / filogic / uboot / a045240b9fd891c6805bc8d0480f221cf74809e4 / . / drivers / mtd / nand / spi / micron.c
blob: 04de51cb46673054e4e9fd656c1485ecb6f26025 [file] [log] [blame]
Peter Pandf1859e2018-08-16 17:30:13 +0200[diff] [blame]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__
Simon Glass9bc15642020-02-03 07:36:16 -0700[diff] [blame]10#include <malloc.h>
Peter Pandf1859e2018-08-16 17:30:13 +0200[diff] [blame]11#include <linux/device.h>
12#include <linux/kernel.h>
13#endif
Simon Glass4dcacfc2020-05-10 11:40:13 -0600[diff] [blame]14#include <linux/bitops.h>
Peter Pandf1859e2018-08-16 17:30:13 +0200[diff] [blame]15#include <linux/mtd/spinand.h>
16
17#define SPINAND_MFR_MICRON 0x2c
18
19#define MICRON_STATUS_ECC_MASK GENMASK(7, 4)
20#define MICRON_STATUS_ECC_NO_BITFLIPS (0 << 4)
21#define MICRON_STATUS_ECC_1TO3_BITFLIPS (1 << 4)
22#define MICRON_STATUS_ECC_4TO6_BITFLIPS (3 << 4)
23#define MICRON_STATUS_ECC_7TO8_BITFLIPS (5 << 4)
24
25static SPINAND_OP_VARIANTS(read_cache_variants,
26 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
27 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
28 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
29 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
30 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
31 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
32
33static SPINAND_OP_VARIANTS(write_cache_variants,
34 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
35 SPINAND_PROG_LOAD(true, 0, NULL, 0));
36
37static SPINAND_OP_VARIANTS(update_cache_variants,
38 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
39 SPINAND_PROG_LOAD(false, 0, NULL, 0));
40
41static int mt29f2g01abagd_ooblayout_ecc(struct mtd_info *mtd, int section,
42 struct mtd_oob_region *region)
43{
44 if (section)
45 return -ERANGE;
46
47 region->offset = 64;
48 region->length = 64;
49
50 return 0;
51}
52
53static int mt29f2g01abagd_ooblayout_free(struct mtd_info *mtd, int section,
54 struct mtd_oob_region *region)
55{
56 if (section)
57 return -ERANGE;
58
59 /* Reserve 2 bytes for the BBM. */
60 region->offset = 2;
61 region->length = 62;
62
63 return 0;
64}
65
66static const struct mtd_ooblayout_ops mt29f2g01abagd_ooblayout = {
67 .ecc = mt29f2g01abagd_ooblayout_ecc,
Simon Glass62fd1a42020-02-03 07:35:56 -0700[diff] [blame]68 .rfree = mt29f2g01abagd_ooblayout_free,
Peter Pandf1859e2018-08-16 17:30:13 +0200[diff] [blame]69};
70
71static int mt29f2g01abagd_ecc_get_status(struct spinand_device *spinand,
72 u8 status)
73{
74 switch (status & MICRON_STATUS_ECC_MASK) {
75 case STATUS_ECC_NO_BITFLIPS:
76 return 0;
77
78 case STATUS_ECC_UNCOR_ERROR:
79 return -EBADMSG;
80
81 case MICRON_STATUS_ECC_1TO3_BITFLIPS:
82 return 3;
83
84 case MICRON_STATUS_ECC_4TO6_BITFLIPS:
85 return 6;
86
87 case MICRON_STATUS_ECC_7TO8_BITFLIPS:
88 return 8;
89
90 default:
91 break;
92 }
93
94 return -EINVAL;
95}
96
97static const struct spinand_info micron_spinand_table[] = {
98 SPINAND_INFO("MT29F2G01ABAGD", 0x24,
99 NAND_MEMORG(1, 2048, 128, 64, 2048, 2, 1, 1),
100 NAND_ECCREQ(8, 512),
101 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
102 &write_cache_variants,
103 &update_cache_variants),
104 0,
105 SPINAND_ECCINFO(&mt29f2g01abagd_ooblayout,
106 mt29f2g01abagd_ecc_get_status)),
107};
108
109static int micron_spinand_detect(struct spinand_device *spinand)
110{
111 u8 *id = spinand->id.data;
112 int ret;
113
114 /*
115 * Micron SPI NAND read ID need a dummy byte,
116 * so the first byte in raw_id is dummy.
117 */
118 if (id[1] != SPINAND_MFR_MICRON)
119 return 0;
120
121 ret = spinand_match_and_init(spinand, micron_spinand_table,
122 ARRAY_SIZE(micron_spinand_table), id[2]);
123 if (ret)
124 return ret;
125
126 return 1;
127}
128
129static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
130 .detect = micron_spinand_detect,
131};
132
133const struct spinand_manufacturer micron_spinand_manufacturer = {
134 .id = SPINAND_MFR_MICRON,
135 .name = "Micron",
136 .ops = &micron_spinand_manuf_ops,
137};