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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020-2021 Rockchip Electronics Co., Ltd.
*
* Author: Dingqiang Lin <jon.lin@rock-chips.com>
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#define FM25S01BI3_STATUS_ECC_MASK (7 << 4)
#define FM25S01BI3_STATUS_ECC_NO_BITFLIPS (0 << 4)
#define FM25S01BI3_STATUS_ECC_1_3_BITFLIPS (1 << 4)
#define FM25S01BI3_STATUS_ECC_UNCOR_ERROR (2 << 4)
#define FM25S01BI3_STATUS_ECC_4_6_BITFLIPS (3 << 4)
#define FM25S01BI3_STATUS_ECC_7_8_BITFLIPS (5 << 4)
#define SPINAND_MFR_FMSH 0xA1
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 2, NULL, 0, 0),
SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0, 0),
SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),
SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));
static SPINAND_OP_VARIANTS(write_cache_variants,
SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
return -ERANGE;
}
static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 2;
region->length = 62;
return 0;
}
static int fm25s01bi3_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
switch (status & FM25S01BI3_STATUS_ECC_MASK) {
case FM25S01BI3_STATUS_ECC_NO_BITFLIPS:
return 0;
case FM25S01BI3_STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
case FM25S01BI3_STATUS_ECC_1_3_BITFLIPS:
return 3;
case FM25S01BI3_STATUS_ECC_4_6_BITFLIPS:
return 6;
case FM25S01BI3_STATUS_ECC_7_8_BITFLIPS:
return 8;
default:
break;
}
return -EINVAL;
}
static int fm25s01bi3_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 64;
region->length = 64;
return 0;
}
static int fm25s01bi3_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
region->offset = (16 * section) + 4;
region->length = 12;
return 0;
}
static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
.ecc = fm25s01a_ooblayout_ecc,
.free = fm25s01a_ooblayout_free,
};
static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout = {
.ecc = fm25s01bi3_ooblayout_ecc,
.free = fm25s01bi3_ooblayout_free,
};
static const struct spinand_info fmsh_spinand_table[] = {
SPINAND_INFO("FM25S01A",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(1, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
SPINAND_INFO("FM25S01BI3",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xd4),
NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&fm25s01bi3_ooblayout,
fm25s01bi3_ecc_get_status)),
};
static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
};
const struct spinand_manufacturer fmsh_spinand_manufacturer = {
.id = SPINAND_MFR_FMSH,
.name = "Fudan Micro",
.chips = fmsh_spinand_table,
.nchips = ARRAY_SIZE(fmsh_spinand_table),
.ops = &fmsh_spinand_manuf_ops,
};
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