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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Stefan Roese <sr@denx.de>
*
* Derived from drivers/mtd/nand/spi/micron.c
* Copyright (c) 2016-2017 Micron Technology, Inc.
*/
#ifndef __UBOOT__
#include <linux/device.h>
#include <linux/kernel.h>
#endif
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_GIGADEVICE 0xc8
#define GIGADEVICE_STATUS_ECC_MASK GENMASK(5, 4)
#define GIGADEVICE_STATUS_ECC_NO_BITFLIPS (0 << 4)
#define GIGADEVICE_STATUS_ECC_1TO7_BITFLIPS (1 << 4)
#define GIGADEVICE_STATUS_ECC_8_BITFLIPS (3 << 4)
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(false, 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 gd5f1gq4u_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 gd5f1gq4u_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
/* Reserve 2 bytes for the BBM. */
region->offset = 2;
region->length = 62;
return 0;
}
static const struct mtd_ooblayout_ops gd5f1gq4u_ooblayout = {
.ecc = gd5f1gq4u_ooblayout_ecc,
.free = gd5f1gq4u_ooblayout_free,
};
static int gd5f1gq4u_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
if (status)
debug("%s (%d): status=%02x\n", __func__, __LINE__, status);
switch (status & GIGADEVICE_STATUS_ECC_MASK) {
case STATUS_ECC_NO_BITFLIPS:
return 0;
case GIGADEVICE_STATUS_ECC_1TO7_BITFLIPS:
return 7;
case GIGADEVICE_STATUS_ECC_8_BITFLIPS:
return 8;
case STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
default:
break;
}
return -EINVAL;
}
static const struct spinand_info gigadevice_spinand_table[] = {
SPINAND_INFO("GD5F1GQ4UC", 0xd1,
NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
NAND_ECCREQ(8, 2048),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&gd5f1gq4u_ooblayout,
gd5f1gq4u_ecc_get_status)),
};
static int gigadevice_spinand_detect(struct spinand_device *spinand)
{
u8 *id = spinand->id.data;
int ret;
/*
* Gigadevice SPI NAND read ID need a dummy byte,
* so the first byte in raw_id is dummy.
*/
if (id[1] != SPINAND_MFR_GIGADEVICE)
return 0;
ret = spinand_match_and_init(spinand, gigadevice_spinand_table,
ARRAY_SIZE(gigadevice_spinand_table),
id[2]);
if (ret)
return ret;
return 1;
}
static const struct spinand_manufacturer_ops gigadevice_spinand_manuf_ops = {
.detect = gigadevice_spinand_detect,
};
const struct spinand_manufacturer gigadevice_spinand_manufacturer = {
.id = SPINAND_MFR_GIGADEVICE,
.name = "GigaDevice",
.ops = &gigadevice_spinand_manuf_ops,
};
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