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