1// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2/*
3 * Copyright (c) 2023, SberDevices. All Rights Reserved.
4 *
5 * Author: Martin Kurbanov <mmkurbanov@salutedevices.com>
6 */
7
8#include <linux/device.h>
9#include <linux/kernel.h>
10#include <linux/mtd/spinand.h>
11
12#define SPINAND_MFR_FORESEE 0xCD
13
14static SPINAND_OP_VARIANTS(read_cache_variants,
15 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
16 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
17 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
18 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
19
20static SPINAND_OP_VARIANTS(write_cache_variants,
21 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
22 SPINAND_PROG_LOAD(true, 0, NULL, 0));
23
24static SPINAND_OP_VARIANTS(update_cache_variants,
25 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
26 SPINAND_PROG_LOAD(false, 0, NULL, 0));
27
28static int f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section,
29 struct mtd_oob_region *region)
30{
31 return -ERANGE;
32}
33
34static int f35sqa002g_ooblayout_free(struct mtd_info *mtd, int section,
35 struct mtd_oob_region *region)
36{
37 if (section)
38 return -ERANGE;
39
40 /* Reserve 2 bytes for the BBM. */
41 region->offset = 2;
42 region->length = 62;
43
44 return 0;
45}
46
47static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = {
48 .ecc = f35sqa002g_ooblayout_ecc,
49 .free = f35sqa002g_ooblayout_free,
50};
51
52static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status)
53{
54 struct nand_device *nand = spinand_to_nand(spinand);
55
56 switch (status & STATUS_ECC_MASK) {
57 case STATUS_ECC_NO_BITFLIPS:
58 return 0;
59
60 case STATUS_ECC_HAS_BITFLIPS:
61 return nanddev_get_ecc_conf(nand)->strength;
62
63 default:
64 break;
65 }
66
67 /* More than 1-bit error was detected in one or more sectors and
68 * cannot be corrected.
69 */
70 return -EBADMSG;
71}
72
73static const struct spinand_info foresee_spinand_table[] = {
74 SPINAND_INFO("F35SQA002G",
75 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72),
76 NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
77 NAND_ECCREQ(1, 512),
78 SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
79 &write_cache_variants,
80 &update_cache_variants),
81 SPINAND_HAS_QE_BIT,
82 SPINAND_ECCINFO(&f35sqa002g_ooblayout,
83 f35sqa002g_ecc_get_status)),
84};
85
86static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
87};
88
89const struct spinand_manufacturer foresee_spinand_manufacturer = {
90 .id = SPINAND_MFR_FORESEE,
91 .name = "FORESEE",
92 .chips = foresee_spinand_table,
93 .nchips = ARRAY_SIZE(foresee_spinand_table),
94 .ops = &foresee_spinand_manuf_ops,
95};
96

source code of linux/drivers/mtd/nand/spi/foresee.c