1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018 Macronix
*
* Author: Boris Brezillon <boris.brezillon@bootlin.com>
*/
#ifndef __UBOOT__
#include <linux/device.h>
#include <linux/kernel.h>
#endif
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_MACRONIX 0xC2
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
static SPINAND_OP_VARIANTS(write_cache_variants,
SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
SPINAND_PROG_LOAD(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
SPINAND_PROG_LOAD(false, 0, NULL, 0));
static int mx35lf1ge4ab_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
return -ERANGE;
}
static int mx35lf1ge4ab_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 2;
region->length = mtd->oobsize - 2;
return 0;
}
static const struct mtd_ooblayout_ops mx35lf1ge4ab_ooblayout = {
.ecc = mx35lf1ge4ab_ooblayout_ecc,
.free = mx35lf1ge4ab_ooblayout_free,
};
static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr)
{
struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0x7c, 1),
SPI_MEM_OP_NO_ADDR,
SPI_MEM_OP_DUMMY(1, 1),
SPI_MEM_OP_DATA_IN(1, eccsr, 1));
return spi_mem_exec_op(spinand->slave, &op);
}
static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
struct nand_device *nand = spinand_to_nand(spinand);
u8 eccsr;
switch (status & STATUS_ECC_MASK) {
case STATUS_ECC_NO_BITFLIPS:
return 0;
case STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
case STATUS_ECC_HAS_BITFLIPS:
/*
* Let's try to retrieve the real maximum number of bitflips
* in order to avoid forcing the wear-leveling layer to move
* data around if it's not necessary.
*/
if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr))
return nand->eccreq.strength;
if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr))
return nand->eccreq.strength;
return eccsr;
default:
break;
}
return -EINVAL;
}
static const struct spinand_info macronix_spinand_table[] = {
SPINAND_INFO("MX35LF1GE4AB", 0x12,
NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
NAND_ECCREQ(4, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&mx35lf1ge4ab_ooblayout,
mx35lf1ge4ab_ecc_get_status)),
};
static int macronix_spinand_detect(struct spinand_device *spinand)
{
u8 *id = spinand->id.data;
int ret;
/*
* Macronix SPI NAND read ID needs a dummy byte, so the first byte in
* raw_id is garbage.
*/
if (id[1] != SPINAND_MFR_MACRONIX)
return 0;
ret = spinand_match_and_init(spinand, macronix_spinand_table,
ARRAY_SIZE(macronix_spinand_table),
id[2]);
if (ret)
return ret;
return 1;
}
static const struct spinand_manufacturer_ops macronix_spinand_manuf_ops = {
.detect = macronix_spinand_detect,
};
const struct spinand_manufacturer macronix_spinand_manufacturer = {
.id = SPINAND_MFR_MACRONIX,
.name = "Macronix",
.ops = ¯onix_spinand_manuf_ops,
};
|
