1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd
4 *
5 * Authors:
6 * Dingqiang Lin <jon.lin@rock-chips.com>
7 */
8
9 #ifndef __UBOOT__
10 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #endif
13 #include <linux/mtd/spinand.h>
14
15 #define SPINAND_MFR_UNIM 0xA1
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
tx25g01_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)33 static int tx25g01_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) + 8;
40 region->length = 8;
41
42 return 0;
43 }
44
tx25g01_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)45 static int tx25g01_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 = 6;
53
54 return 0;
55 }
56
57 static const struct mtd_ooblayout_ops tx25g01_ooblayout = {
58 .ecc = tx25g01_ooblayout_ecc,
59 .rfree = tx25g01_ooblayout_free,
60 };
61
62 /*
63 * ecc bits: 0xC0[4,6]
64 * [0b000], No bit errors were detected;
65 * [0b001, 0b011], 1~3 Bit errors were detected and corrected. Not
66 * reach Flipping Bits;
67 * [0b100], Bit error count equals the bit flip
68 * detection threshold
69 * others, Reserved.
70 */
tx25g01_ecc_get_status(struct spinand_device * spinand,u8 status)71 static int tx25g01_ecc_get_status(struct spinand_device *spinand,
72 u8 status)
73 {
74 struct nand_device *nand = spinand_to_nand(spinand);
75 u8 eccsr = (status & GENMASK(6, 4)) >> 4;
76
77 if (eccsr < 4)
78 return eccsr;
79 else if (eccsr == 4)
80 return nand->eccreq.strength;
81 else
82 return -EBADMSG;
83 }
84
85 static const struct spinand_info unim_spinand_table[] = {
86 SPINAND_INFO("TX25G01",
87 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xF1),
88 NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
89 NAND_ECCREQ(4, 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(&tx25g01_ooblayout, tx25g01_ecc_get_status)),
95 };
96
97 static const struct spinand_manufacturer_ops unim_spinand_manuf_ops = {
98 };
99
100 const struct spinand_manufacturer unim_spinand_manufacturer = {
101 .id = SPINAND_MFR_UNIM,
102 .name = "UNIM",
103 .chips = unim_spinand_table,
104 .nchips = ARRAY_SIZE(unim_spinand_table),
105 .ops = &unim_spinand_manuf_ops,
106 };
107