fmsh.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2020-2021 Rockchip Electronics Co., Ltd.
  4 *
  5 * Author: Dingqiang Lin <jon.lin@rock-chips.com>
  6 */
  7
  8#include <linux/device.h>
  9#include <linux/kernel.h>
 10#include <linux/mtd/spinand.h>
 11
 12#define FM25S01BI3_STATUS_ECC_MASK		(7 << 4)
 13	#define FM25S01BI3_STATUS_ECC_NO_BITFLIPS	(0 << 4)
 14	#define FM25S01BI3_STATUS_ECC_1_3_BITFLIPS	(1 << 4)
 15	#define FM25S01BI3_STATUS_ECC_UNCOR_ERROR	(2 << 4)
 16	#define FM25S01BI3_STATUS_ECC_4_6_BITFLIPS	(3 << 4)
 17	#define FM25S01BI3_STATUS_ECC_7_8_BITFLIPS	(5 << 4)
 18
 19#define SPINAND_MFR_FMSH		0xA1
 20
 21static SPINAND_OP_VARIANTS(read_cache_variants,
 22		SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 2, NULL, 0, 0),
 23		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
 24		SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0, 0),
 25		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
 26		SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),
 27		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));
 28
 29static SPINAND_OP_VARIANTS(write_cache_variants,
 30		SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
 31		SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
 32
 33static SPINAND_OP_VARIANTS(update_cache_variants,
 34		SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
 35		SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
 36
 37static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
 38				  struct mtd_oob_region *region)
 39{
 40	return -ERANGE;
 41}
 42
 43static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
 44				   struct mtd_oob_region *region)
 45{
 46	if (section)
 47		return -ERANGE;
 48
 49	region->offset = 2;
 50	region->length = 62;
 51
 52	return 0;
 53}
 54
 55static int fm25s01bi3_ecc_get_status(struct spinand_device *spinand,
 56				     u8 status)
 57{
 58	switch (status & FM25S01BI3_STATUS_ECC_MASK) {
 59	case FM25S01BI3_STATUS_ECC_NO_BITFLIPS:
 60		return 0;
 61
 62	case FM25S01BI3_STATUS_ECC_UNCOR_ERROR:
 63		return -EBADMSG;
 64
 65	case FM25S01BI3_STATUS_ECC_1_3_BITFLIPS:
 66		return 3;
 67
 68	case FM25S01BI3_STATUS_ECC_4_6_BITFLIPS:
 69		return 6;
 70
 71	case FM25S01BI3_STATUS_ECC_7_8_BITFLIPS:
 72		return 8;
 73
 74	default:
 75		break;
 76	}
 77
 78	return -EINVAL;
 79}
 80
 81static int fm25s01bi3_ooblayout_ecc(struct mtd_info *mtd, int section,
 82				    struct mtd_oob_region *region)
 83{
 84	if (section)
 85		return -ERANGE;
 86
 87	region->offset = 64;
 88	region->length = 64;
 89
 90	return 0;
 91}
 92
 93static int fm25s01bi3_ooblayout_free(struct mtd_info *mtd, int section,
 94				     struct mtd_oob_region *region)
 95{
 96	if (section > 3)
 97		return -ERANGE;
 98
 99	region->offset = (16 * section) + 4;
100	region->length = 12;
101
102	return 0;
103}
104
105static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
106	.ecc = fm25s01a_ooblayout_ecc,
107	.free = fm25s01a_ooblayout_free,
108};
109
110static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout = {
111	.ecc = fm25s01bi3_ooblayout_ecc,
112	.free = fm25s01bi3_ooblayout_free,
113};
114
115static const struct spinand_info fmsh_spinand_table[] = {
116	SPINAND_INFO("FM25S01A",
117		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
118		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
119		     NAND_ECCREQ(1, 512),
120		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
121					      &write_cache_variants,
122					      &update_cache_variants),
123		     0,
124		     SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
125	SPINAND_INFO("FM25S01BI3",
126		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xd4),
127		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
128		     NAND_ECCREQ(8, 512),
129		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
130					      &write_cache_variants,
131					      &update_cache_variants),
132		     SPINAND_HAS_QE_BIT,
133		     SPINAND_ECCINFO(&fm25s01bi3_ooblayout,
134				      fm25s01bi3_ecc_get_status)),
135};
136
137static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
138};
139
140const struct spinand_manufacturer fmsh_spinand_manufacturer = {
141	.id = SPINAND_MFR_FMSH,
142	.name = "Fudan Micro",
143	.chips = fmsh_spinand_table,
144	.nchips = ARRAY_SIZE(fmsh_spinand_table),
145	.ops = &fmsh_spinand_manuf_ops,
146};