1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2022 Aidan MacDonald
4 *
5 * Author: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
6 */
7
8 #include <linux/device.h>
9 #include <linux/kernel.h>
10 #include <linux/mtd/spinand.h>
11
12
13 #define SPINAND_MFR_ATO 0x9b
14
15
16 static SPINAND_OP_VARIANTS(read_cache_variants,
17 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
18 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
19 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
20
21 static SPINAND_OP_VARIANTS(write_cache_variants,
22 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
23 SPINAND_PROG_LOAD(true, 0, NULL, 0));
24
25 static SPINAND_OP_VARIANTS(update_cache_variants,
26 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
27 SPINAND_PROG_LOAD(false, 0, NULL, 0));
28
29
ato25d1ga_ooblayout_ecc(struct mtd_info * mtd,int section,struct mtd_oob_region * region)30 static int ato25d1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
31 struct mtd_oob_region *region)
32 {
33 if (section > 3)
34 return -ERANGE;
35
36 region->offset = (16 * section) + 8;
37 region->length = 8;
38 return 0;
39 }
40
ato25d1ga_ooblayout_free(struct mtd_info * mtd,int section,struct mtd_oob_region * region)41 static int ato25d1ga_ooblayout_free(struct mtd_info *mtd, int section,
42 struct mtd_oob_region *region)
43 {
44 if (section > 3)
45 return -ERANGE;
46
47 if (section) {
48 region->offset = (16 * section);
49 region->length = 8;
50 } else {
51 /* first byte of section 0 is reserved for the BBM */
52 region->offset = 1;
53 region->length = 7;
54 }
55
56 return 0;
57 }
58
59 static const struct mtd_ooblayout_ops ato25d1ga_ooblayout = {
60 .ecc = ato25d1ga_ooblayout_ecc,
61 .free = ato25d1ga_ooblayout_free,
62 };
63
64
65 static const struct spinand_info ato_spinand_table[] = {
66 SPINAND_INFO("ATO25D1GA",
67 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x12),
68 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
69 NAND_ECCREQ(1, 512),
70 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
71 &write_cache_variants,
72 &update_cache_variants),
73 SPINAND_HAS_QE_BIT,
74 SPINAND_ECCINFO(&ato25d1ga_ooblayout, NULL)),
75 };
76
77 static const struct spinand_manufacturer_ops ato_spinand_manuf_ops = {
78 };
79
80 const struct spinand_manufacturer ato_spinand_manufacturer = {
81 .id = SPINAND_MFR_ATO,
82 .name = "ATO",
83 .chips = ato_spinand_table,
84 .nchips = ARRAY_SIZE(ato_spinand_table),
85 .ops = &ato_spinand_manuf_ops,
86 };
87