1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 /*
3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd.
4 */
5
6 #include <linux/device.h>
7 #include <linux/kernel.h>
8 #include <linux/mtd/spinand.h>
9
10 #define SPINAND_MFR_BIWIN 0xBC
11
12 #define BIWIN_CFG_BUF_READ BIT(3)
13 #define BIWIN_STATUS_ECC_HAS_BITFLIPS_T (3 << 4)
14
15 static SPINAND_OP_VARIANTS(read_cache_variants,
16 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
17 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
18 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
19 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
20 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
21 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
22
23 static SPINAND_OP_VARIANTS(write_cache_variants,
24 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
25 SPINAND_PROG_LOAD(true, 0, NULL, 0));
26
27 static SPINAND_OP_VARIANTS(update_cache_variants,
28 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
29 SPINAND_PROG_LOAD(false, 0, NULL, 0));
30
bwjx08k_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)31 static int bwjx08k_ooblayout_ecc(struct mtd_info *mtd, int section,
32 struct mtd_oob_region *region)
33 {
34 if (section > 3)
35 return -ERANGE;
36
37 region->offset = (16 * section) + 12;
38 region->length = 4;
39
40 return 0;
41 }
42
bwjx08k_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)43 static int bwjx08k_ooblayout_free(struct mtd_info *mtd, int section,
44 struct mtd_oob_region *region)
45 {
46 if (section > 3)
47 return -ERANGE;
48
49 region->offset = (16 * section) + 2;
50 region->length = 10;
51
52 return 0;
53 }
54
55 static const struct mtd_ooblayout_ops bwjx08k_ooblayout = {
56 .ecc = bwjx08k_ooblayout_ecc,
57 .free = bwjx08k_ooblayout_free,
58 };
59
bwjx08k_ecc_get_status(struct spinand_device * spinand,u8 status)60 static int bwjx08k_ecc_get_status(struct spinand_device *spinand,
61 u8 status)
62 {
63 struct nand_device *nand = spinand_to_nand(spinand);
64
65 switch (status & STATUS_ECC_MASK) {
66 case STATUS_ECC_NO_BITFLIPS:
67 return 0;
68
69 case STATUS_ECC_UNCOR_ERROR:
70 return -EBADMSG;
71
72 case STATUS_ECC_HAS_BITFLIPS:
73 return 1;
74
75 default:
76 return nanddev_get_ecc_requirements(nand)->strength;
77 }
78
79 return -EINVAL;
80 }
81
82 /* Another set for the same id[2] devices in one series */
83 static const struct spinand_info biwin_spinand_table[] = {
84 SPINAND_INFO("BWJX08K",
85 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xB3),
86 NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
87 NAND_ECCREQ(8, 512),
88 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
89 &write_cache_variants,
90 &update_cache_variants),
91 SPINAND_HAS_QE_BIT,
92 SPINAND_ECCINFO(&bwjx08k_ooblayout,
93 bwjx08k_ecc_get_status)),
94 };
95
96 static const struct spinand_manufacturer_ops biwin_spinand_manuf_ops = {
97 };
98
99 const struct spinand_manufacturer biwin_spinand_manufacturer = {
100 .id = SPINAND_MFR_BIWIN,
101 .name = "BIWIN",
102 .chips = biwin_spinand_table,
103 .nchips = ARRAY_SIZE(biwin_spinand_table),
104 .ops = &biwin_spinand_manuf_ops,
105 };
106