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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Aidan MacDonald
*
* Author: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_ATO 0x9b
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_X4_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 ato25d1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
region->offset = (16 * section) + 8;
region->length = 8;
return 0;
}
static int ato25d1ga_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
if (section) {
region->offset = (16 * section);
region->length = 8;
} else {
/* first byte of section 0 is reserved for the BBM */
region->offset = 1;
region->length = 7;
}
return 0;
}
static const struct mtd_ooblayout_ops ato25d1ga_ooblayout = {
.ecc = ato25d1ga_ooblayout_ecc,
.free = ato25d1ga_ooblayout_free,
};
static const struct spinand_info ato_spinand_table[] = {
SPINAND_INFO("ATO25D1GA",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x12),
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),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&ato25d1ga_ooblayout, NULL)),
};
static const struct spinand_manufacturer_ops ato_spinand_manuf_ops = {
};
const struct spinand_manufacturer ato_spinand_manufacturer = {
.id = SPINAND_MFR_ATO,
.name = "ATO",
.chips = ato_spinand_table,
.nchips = ARRAY_SIZE(ato_spinand_table),
.ops = &ato_spinand_manuf_ops,
};
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