// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2021 Rockchip Electronics Co., Ltd.
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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/mtd/spinand.h>
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#define SPINAND_MFR_ETRON 0xD5
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static SPINAND_OP_VARIANTS(read_cache_variants,
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SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
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static SPINAND_OP_VARIANTS(write_cache_variants,
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SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
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SPINAND_PROG_LOAD(true, 0, NULL, 0));
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static SPINAND_OP_VARIANTS(update_cache_variants,
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SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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SPINAND_PROG_LOAD(false, 0, NULL, 0));
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static int em73c044vcf_oh_ooblayout_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section > 3)
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return -ERANGE;
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region->offset = (16 * section) + 8;
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region->length = 8;
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return 0;
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}
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static int em73c044vcf_oh_ooblayout_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section > 3)
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return -ERANGE;
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region->offset = (16 * section) + 2;
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region->length = 6;
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return 0;
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}
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static const struct mtd_ooblayout_ops em73c044vcf_oh_ooblayout = {
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.ecc = em73c044vcf_oh_ooblayout_ecc,
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.free = em73c044vcf_oh_ooblayout_free,
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};
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static int em73c044vcf_oh_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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struct nand_device *nand = spinand_to_nand(spinand);
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switch (status & STATUS_ECC_MASK) {
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case STATUS_ECC_NO_BITFLIPS:
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return 0;
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case STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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case STATUS_ECC_HAS_BITFLIPS:
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return 1;
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default:
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return nanddev_get_ecc_requirements(nand)->strength;
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}
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return -EINVAL;
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}
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static const struct spinand_info etron_spinand_table[] = {
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SPINAND_INFO("EM73C044VCF-0H",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x36),
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NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
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NAND_ECCREQ(4, 512),
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SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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&write_cache_variants,
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&update_cache_variants),
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SPINAND_HAS_QE_BIT,
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SPINAND_ECCINFO(&em73c044vcf_oh_ooblayout,
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em73c044vcf_oh_ecc_get_status)),
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};
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static const struct spinand_manufacturer_ops etron_spinand_manuf_ops = {
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};
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const struct spinand_manufacturer etron_spinand_manufacturer = {
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.id = SPINAND_MFR_ETRON,
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.name = "Etron",
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.chips = etron_spinand_table,
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.nchips = ARRAY_SIZE(etron_spinand_table),
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.ops = &etron_spinand_manuf_ops,
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};
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