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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 8ad92118dc6377d4cd4c3b784182be008c63cf16 / . / drivers / mtd / nand / spi / micron.c
blob: 687306e33e685ff75c3272e70b9323b44bd43947 [file] [log] [blame]
Peter Pan883d8772018-08-16 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 Glass336d4612020-02-03 07:36:16 -0700[diff] [blame]10#include <malloc.h>
Peter Pan883d8772018-08-16 17:30:13 +0200[diff] [blame]11#include <linux/device.h>
12#include <linux/kernel.h>
13#endif
14#include <linux/mtd/spinand.h>
15
16#define SPINAND_MFR_MICRON 0x2c
17
18#define MICRON_STATUS_ECC_MASK GENMASK(7, 4)
19#define MICRON_STATUS_ECC_NO_BITFLIPS (0 << 4)
20#define MICRON_STATUS_ECC_1TO3_BITFLIPS (1 << 4)
21#define MICRON_STATUS_ECC_4TO6_BITFLIPS (3 << 4)
22#define MICRON_STATUS_ECC_7TO8_BITFLIPS (5 << 4)
23
24static SPINAND_OP_VARIANTS(read_cache_variants,
25 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
26 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
27 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
28 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
29 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
30 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
31
32static SPINAND_OP_VARIANTS(write_cache_variants,
33 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
34 SPINAND_PROG_LOAD(true, 0, NULL, 0));
35
36static SPINAND_OP_VARIANTS(update_cache_variants,
37 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
38 SPINAND_PROG_LOAD(false, 0, NULL, 0));
39
40static int mt29f2g01abagd_ooblayout_ecc(struct mtd_info *mtd, int section,
41 struct mtd_oob_region *region)
42{
43 if (section)
44 return -ERANGE;
45
46 region->offset = 64;
47 region->length = 64;
48
49 return 0;
50}
51
52static int mt29f2g01abagd_ooblayout_free(struct mtd_info *mtd, int section,
53 struct mtd_oob_region *region)
54{
55 if (section)
56 return -ERANGE;
57
58 /* Reserve 2 bytes for the BBM. */
59 region->offset = 2;
60 region->length = 62;
61
62 return 0;
63}
64
65static const struct mtd_ooblayout_ops mt29f2g01abagd_ooblayout = {
66 .ecc = mt29f2g01abagd_ooblayout_ecc,
Simon Glass8d38a842020-02-03 07:35:56 -0700[diff] [blame]67 .rfree = mt29f2g01abagd_ooblayout_free,
Peter Pan883d8772018-08-16 17:30:13 +0200[diff] [blame]68};
69
70static int mt29f2g01abagd_ecc_get_status(struct spinand_device *spinand,
71 u8 status)
72{
73 switch (status & MICRON_STATUS_ECC_MASK) {
74 case STATUS_ECC_NO_BITFLIPS:
75 return 0;
76
77 case STATUS_ECC_UNCOR_ERROR:
78 return -EBADMSG;
79
80 case MICRON_STATUS_ECC_1TO3_BITFLIPS:
81 return 3;
82
83 case MICRON_STATUS_ECC_4TO6_BITFLIPS:
84 return 6;
85
86 case MICRON_STATUS_ECC_7TO8_BITFLIPS:
87 return 8;
88
89 default:
90 break;
91 }
92
93 return -EINVAL;
94}
95
96static const struct spinand_info micron_spinand_table[] = {
97 SPINAND_INFO("MT29F2G01ABAGD", 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};
107
108static int micron_spinand_detect(struct spinand_device *spinand)
109{
110 u8 *id = spinand->id.data;
111 int ret;
112
113 /*
114 * Micron SPI NAND read ID need a dummy byte,
115 * so the first byte in raw_id is dummy.
116 */
117 if (id[1] != SPINAND_MFR_MICRON)
118 return 0;
119
120 ret = spinand_match_and_init(spinand, micron_spinand_table,
121 ARRAY_SIZE(micron_spinand_table), id[2]);
122 if (ret)
123 return ret;
124
125 return 1;
126}
127
128static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
129 .detect = micron_spinand_detect,
130};
131
132const struct spinand_manufacturer micron_spinand_manufacturer = {
133 .id = SPINAND_MFR_MICRON,
134 .name = "Micron",
135 .ops = &micron_spinand_manuf_ops,
136};