xref: /OK3568_Linux_fs/u-boot/drivers/mtd/nand/spi/biwin.c (revision 4882a59341e53eb6f0b4789bf948001014eff981)
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