1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 /*
3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd.
4 */
5
6 #ifndef __UBOOT__
7 #include <linux/device.h>
8 #include <linux/kernel.h>
9 #endif
10 #include <linux/mtd/spinand.h>
11
12 #define SPINAND_MFR_BIWIN 0xBC
13
14 #define BIWIN_CFG_BUF_READ BIT(3)
15 #define BIWIN_STATUS_ECC_HAS_BITFLIPS_T (3 << 4)
16
17 static SPINAND_OP_VARIANTS(read_cache_variants,
18 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
19 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
20 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
21 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
22 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
23 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
24
25 static SPINAND_OP_VARIANTS(write_cache_variants,
26 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
27 SPINAND_PROG_LOAD(true, 0, NULL, 0));
28
29 static SPINAND_OP_VARIANTS(update_cache_variants,
30 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
31 SPINAND_PROG_LOAD(false, 0, NULL, 0));
32
bwjx08k_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)33 static int bwjx08k_ooblayout_ecc(struct mtd_info *mtd, int section,
34 struct mtd_oob_region *region)
35 {
36 if (section > 3)
37 return -ERANGE;
38
39 region->offset = (16 * section) + 12;
40 region->length = 4;
41
42 return 0;
43 }
44
bwjx08k_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)45 static int bwjx08k_ooblayout_free(struct mtd_info *mtd, int section,
46 struct mtd_oob_region *region)
47 {
48 if (section > 3)
49 return -ERANGE;
50
51 region->offset = (16 * section) + 2;
52 region->length = 10;
53
54 return 0;
55 }
56
57 static const struct mtd_ooblayout_ops bwjx08k_ooblayout = {
58 .ecc = bwjx08k_ooblayout_ecc,
59 .rfree = bwjx08k_ooblayout_free,
60 };
61
bwjx08k_ecc_get_status(struct spinand_device * spinand,u8 status)62 static int bwjx08k_ecc_get_status(struct spinand_device *spinand,
63 u8 status)
64 {
65 struct nand_device *nand = spinand_to_nand(spinand);
66
67 switch (status & STATUS_ECC_MASK) {
68 case STATUS_ECC_NO_BITFLIPS:
69 return 0;
70
71 case STATUS_ECC_UNCOR_ERROR:
72 return -EBADMSG;
73
74 case STATUS_ECC_HAS_BITFLIPS:
75 return 1;
76
77 default:
78 return nand->eccreq.strength;
79 }
80
81 return -EINVAL;
82 }
83
84 /* Another set for the same id[2] devices in one series */
85 static const struct spinand_info biwin_spinand_table[] = {
86 SPINAND_INFO("BWJX08K",
87 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xB3),
88 NAND_MEMORG(1, 2048, 64, 64, 2048, 1, 1, 1),
89 NAND_ECCREQ(8, 512),
90 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
91 &write_cache_variants,
92 &update_cache_variants),
93 SPINAND_HAS_QE_BIT,
94 SPINAND_ECCINFO(&bwjx08k_ooblayout,
95 bwjx08k_ecc_get_status)),
96 };
97
98 static const struct spinand_manufacturer_ops biwin_spinand_manuf_ops = {
99 };
100
101 const struct spinand_manufacturer biwin_spinand_manufacturer = {
102 .id = SPINAND_MFR_BIWIN,
103 .name = "BIWIN",
104 .chips = biwin_spinand_table,
105 .nchips = ARRAY_SIZE(biwin_spinand_table),
106 .ops = &biwin_spinand_manuf_ops,
107 };
108