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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2024 SkyHigh Memory Limited
*
* Author: Takahiro Kuwano <takahiro.kuwano@infineon.com>
* Co-Author: KR Kim <kr.kim@skyhighmemory.com>
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_SKYHIGH 0x01
#define SKYHIGH_STATUS_ECC_1TO2_BITFLIPS (1 << 4)
#define SKYHIGH_STATUS_ECC_3TO6_BITFLIPS (2 << 4)
#define SKYHIGH_STATUS_ECC_UNCOR_ERROR (3 << 4)
#define SKYHIGH_CONFIG_PROTECT_EN BIT(1)
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 4, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 2, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_FAST_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(0, 1, NULL, 0));
static SPINAND_OP_VARIANTS(write_cache_variants,
SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
SPINAND_PROG_LOAD(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
SPINAND_PROG_LOAD(false, 0, NULL, 0));
static int skyhigh_spinand_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
/* ECC bytes are stored in hidden area. */
return -ERANGE;
}
static int skyhigh_spinand_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
/* ECC bytes are stored in hidden area. Reserve 2 bytes for the BBM. */
region->offset = 2;
region->length = mtd->oobsize - 2;
return 0;
}
static const struct mtd_ooblayout_ops skyhigh_spinand_ooblayout = {
.ecc = skyhigh_spinand_ooblayout_ecc,
.free = skyhigh_spinand_ooblayout_free,
};
static int skyhigh_spinand_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
switch (status & STATUS_ECC_MASK) {
case STATUS_ECC_NO_BITFLIPS:
return 0;
case SKYHIGH_STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
case SKYHIGH_STATUS_ECC_1TO2_BITFLIPS:
return 2;
case SKYHIGH_STATUS_ECC_3TO6_BITFLIPS:
return 6;
default:
break;
}
return -EINVAL;
}
static const struct spinand_info skyhigh_spinand_table[] = {
SPINAND_INFO("S35ML01G301",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x15),
NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(6, 32),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_NO_RAW_ACCESS,
SPINAND_ECCINFO(&skyhigh_spinand_ooblayout,
skyhigh_spinand_ecc_get_status)),
SPINAND_INFO("S35ML01G300",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x14),
NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(6, 32),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_NO_RAW_ACCESS,
SPINAND_ECCINFO(&skyhigh_spinand_ooblayout,
skyhigh_spinand_ecc_get_status)),
SPINAND_INFO("S35ML02G300",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x25),
NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 2, 1, 1),
NAND_ECCREQ(6, 32),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_NO_RAW_ACCESS,
SPINAND_ECCINFO(&skyhigh_spinand_ooblayout,
skyhigh_spinand_ecc_get_status)),
SPINAND_INFO("S35ML04G300",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x35),
NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 2, 1, 1),
NAND_ECCREQ(6, 32),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_NO_RAW_ACCESS,
SPINAND_ECCINFO(&skyhigh_spinand_ooblayout,
skyhigh_spinand_ecc_get_status)),
};
static int skyhigh_spinand_init(struct spinand_device *spinand)
{
/*
* Config_Protect_En (bit 1 in Block Lock register) must be set to 1
* before writing other bits. Do it here before core unlocks all blocks
* by writing block protection bits.
*/
return spinand_write_reg_op(spinand, REG_BLOCK_LOCK,
SKYHIGH_CONFIG_PROTECT_EN);
}
static const struct spinand_manufacturer_ops skyhigh_spinand_manuf_ops = {
.init = skyhigh_spinand_init,
};
const struct spinand_manufacturer skyhigh_spinand_manufacturer = {
.id = SPINAND_MFR_SKYHIGH,
.name = "SkyHigh",
.chips = skyhigh_spinand_table,
.nchips = ARRAY_SIZE(skyhigh_spinand_table),
.ops = &skyhigh_spinand_manuf_ops,
};
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