// SPDX-License-Identifier: GPL-2.0
/*
 * Author: Ahmed Naseef <naseefkm@gmail.com>
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>

#define SPINAND_MFR_DOSILICON        0xE5

static SPINAND_OP_VARIANTS(read_cache_variants,
                SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_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 ds35xx_ooblayout_ecc(struct mtd_info *mtd, int section,
                                struct mtd_oob_region *region)
{
        if (section > 3)
                return -ERANGE;

        region->offset = 8 + (section * 16);
        region->length = 8;

        return 0;
}

static int ds35xx_ooblayout_free(struct mtd_info *mtd, int section,
                                 struct mtd_oob_region *region)
{
        if (section > 3)
                return -ERANGE;

        if (section == 0) {
                /* reserve 2 bytes for the BBM */
                region->offset = 2;
                region->length = 6;
        } else {
                region->offset = section * 16;
                region->length = 8;
        }

        return 0;
}

static const struct mtd_ooblayout_ops ds35xx_ooblayout = {
        .ecc = ds35xx_ooblayout_ecc,
        .free = ds35xx_ooblayout_free,
};

static const struct spinand_info dosilicon_spinand_table[] = {
        SPINAND_INFO("DS35Q1GA",
                SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),
                NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
                NAND_ECCREQ(4, 512),
                SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
                                         &write_cache_variants,
                                         &update_cache_variants),
                SPINAND_HAS_QE_BIT,
                SPINAND_ECCINFO(&ds35xx_ooblayout, NULL)),
        SPINAND_INFO("DS35M1GA",
                SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x21),
                NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
                NAND_ECCREQ(4, 512),
                SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
                                         &write_cache_variants,
                                         &update_cache_variants),
                SPINAND_HAS_QE_BIT,
                SPINAND_ECCINFO(&ds35xx_ooblayout, NULL)),
};

static const struct spinand_manufacturer_ops dosilicon_spinand_manuf_ops = {
};

const struct spinand_manufacturer dosilicon_spinand_manufacturer = {
        .id = SPINAND_MFR_DOSILICON,
        .name = "Dosilicon",
        .chips = dosilicon_spinand_table,
        .nchips = ARRAY_SIZE(dosilicon_spinand_table),
        .ops = &dosilicon_spinand_manuf_ops,
};