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 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #include <linux/mtd/spinand.h>
13
14 #define SPINAND_MFR_WINBOND 0xEF
15
16 #define WINBOND_CFG_BUF_READ BIT(3)
17
18 static SPINAND_OP_VARIANTS(read_cache_variants,
19 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
20 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
21 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
22 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
23 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
24 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
25
26 static SPINAND_OP_VARIANTS(write_cache_variants,
27 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
28 SPINAND_PROG_LOAD(true, 0, NULL, 0));
29
30 static SPINAND_OP_VARIANTS(update_cache_variants,
31 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
32 SPINAND_PROG_LOAD(false, 0, NULL, 0));
33
w25m02gv_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)34 static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
35 struct mtd_oob_region *region)
36 {
37 if (section > 3)
38 return -ERANGE;
39
40 region->offset = (16 * section) + 8;
41 region->length = 8;
42
43 return 0;
44 }
45
w25m02gv_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)46 static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section,
47 struct mtd_oob_region *region)
48 {
49 if (section > 3)
50 return -ERANGE;
51
52 region->offset = (16 * section) + 2;
53 region->length = 6;
54
55 return 0;
56 }
57
58 static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {
59 .ecc = w25m02gv_ooblayout_ecc,
60 .free = w25m02gv_ooblayout_free,
61 };
62
w25m02gv_select_target(struct spinand_device * spinand,unsigned int target)63 static int w25m02gv_select_target(struct spinand_device *spinand,
64 unsigned int target)
65 {
66 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),
67 SPI_MEM_OP_NO_ADDR,
68 SPI_MEM_OP_NO_DUMMY,
69 SPI_MEM_OP_DATA_OUT(1,
70 spinand->scratchbuf,
71 1));
72
73 *spinand->scratchbuf = target;
74 return spi_mem_exec_op(spinand->spimem, &op);
75 }
76
77 static const struct spinand_info winbond_spinand_table[] = {
78 SPINAND_INFO("W25M02GV",
79 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab),
80 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 2),
81 NAND_ECCREQ(1, 512),
82 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
83 &write_cache_variants,
84 &update_cache_variants),
85 0,
86 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
87 SPINAND_SELECT_TARGET(w25m02gv_select_target)),
88 SPINAND_INFO("W25N01GV",
89 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa),
90 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
91 NAND_ECCREQ(1, 512),
92 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
93 &write_cache_variants,
94 &update_cache_variants),
95 0,
96 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
97 };
98
winbond_spinand_init(struct spinand_device * spinand)99 static int winbond_spinand_init(struct spinand_device *spinand)
100 {
101 struct nand_device *nand = spinand_to_nand(spinand);
102 unsigned int i;
103
104 /*
105 * Make sure all dies are in buffer read mode and not continuous read
106 * mode.
107 */
108 for (i = 0; i < nand->memorg.ntargets; i++) {
109 spinand_select_target(spinand, i);
110 spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ,
111 WINBOND_CFG_BUF_READ);
112 }
113
114 return 0;
115 }
116
117 static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {
118 .init = winbond_spinand_init,
119 };
120
121 const struct spinand_manufacturer winbond_spinand_manufacturer = {
122 .id = SPINAND_MFR_WINBOND,
123 .name = "Winbond",
124 .chips = winbond_spinand_table,
125 .nchips = ARRAY_SIZE(winbond_spinand_table),
126 .ops = &winbond_spinand_manuf_ops,
127 };
128