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git01.mediatek.com / filogic / uboot / b05bdfc7dfb1465b1c6ab562c939e650802dd212 / . / drivers / mtd / nand / spi / winbond.c
blob: eac811d97c21c49f2023ba05fadd132fb0133a8d [file] [log] [blame]
Frieder Schrempfea4d7c82018-08-16 17:30:14 +0200[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2017 exceet electronics GmbH
4 *
5 * Authors:
6 * Frieder Schrempf <frieder.schrempf@exceet.de>
7 * Boris Brezillon <boris.brezillon@bootlin.com>
8 */
9
10#ifndef __UBOOT__
11#include <linux/device.h>
12#include <linux/kernel.h>
13#endif
14#include <linux/mtd/spinand.h>
15
16#define SPINAND_MFR_WINBOND 0xEF
17
18#define WINBOND_CFG_BUF_READ BIT(3)
19
20static SPINAND_OP_VARIANTS(read_cache_variants,
21 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
22 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
23 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
24 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
25 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
26 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
27
28static SPINAND_OP_VARIANTS(write_cache_variants,
29 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
30 SPINAND_PROG_LOAD(true, 0, NULL, 0));
31
32static SPINAND_OP_VARIANTS(update_cache_variants,
33 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
34 SPINAND_PROG_LOAD(false, 0, NULL, 0));
35
36static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
37 struct mtd_oob_region *region)
38{
39 if (section > 3)
40 return -ERANGE;
41
42 region->offset = (16 * section) + 8;
43 region->length = 8;
44
45 return 0;
46}
47
48static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section,
49 struct mtd_oob_region *region)
50{
51 if (section > 3)
52 return -ERANGE;
53
54 region->offset = (16 * section) + 2;
55 region->length = 6;
56
57 return 0;
58}
59
60static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {
61 .ecc = w25m02gv_ooblayout_ecc,
62 .free = w25m02gv_ooblayout_free,
63};
64
65static int w25m02gv_select_target(struct spinand_device *spinand,
66 unsigned int target)
67{
68 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),
69 SPI_MEM_OP_NO_ADDR,
70 SPI_MEM_OP_NO_DUMMY,
71 SPI_MEM_OP_DATA_OUT(1,
72 spinand->scratchbuf,
73 1));
74
75 *spinand->scratchbuf = target;
76 return spi_mem_exec_op(spinand->slave, &op);
77}
78
79static const struct spinand_info winbond_spinand_table[] = {
80 SPINAND_INFO("W25M02GV", 0xAB,
81 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 2),
82 NAND_ECCREQ(1, 512),
83 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
84 &write_cache_variants,
85 &update_cache_variants),
86 0,
87 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
88 SPINAND_SELECT_TARGET(w25m02gv_select_target)),
89};
90
91/**
92 * winbond_spinand_detect - initialize device related part in spinand_device
93 * struct if it is a Winbond device.
94 * @spinand: SPI NAND device structure
95 */
96static int winbond_spinand_detect(struct spinand_device *spinand)
97{
98 u8 *id = spinand->id.data;
99 int ret;
100
101 /*
102 * Winbond SPI NAND read ID need a dummy byte,
103 * so the first byte in raw_id is dummy.
104 */
105 if (id[1] != SPINAND_MFR_WINBOND)
106 return 0;
107
108 ret = spinand_match_and_init(spinand, winbond_spinand_table,
109 ARRAY_SIZE(winbond_spinand_table), id[2]);
110 if (ret)
111 return ret;
112
113 return 1;
114}
115
116static int winbond_spinand_init(struct spinand_device *spinand)
117{
118 struct nand_device *nand = spinand_to_nand(spinand);
119 unsigned int i;
120
121 /*
122 * Make sure all dies are in buffer read mode and not continuous read
123 * mode.
124 */
125 for (i = 0; i < nand->memorg.ntargets; i++) {
126 spinand_select_target(spinand, i);
127 spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ,
128 WINBOND_CFG_BUF_READ);
129 }
130
131 return 0;
132}
133
134static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {
135 .detect = winbond_spinand_detect,
136 .init = winbond_spinand_init,
137};
138
139const struct spinand_manufacturer winbond_spinand_manufacturer = {
140 .id = SPINAND_MFR_WINBOND,
141 .name = "Winbond",
142 .ops = &winbond_spinand_manuf_ops,
143};