102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020 exceet electronics GmbH
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*
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* Authors:
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* Frieder Schrempf <frieder.schrempf@exceet.de>
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* Boris Brezillon <boris.brezillon@bootlin.com>
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*/
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#ifndef __UBOOT__
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#include <linux/device.h>
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#include <linux/kernel.h>
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#endif
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#include <linux/mtd/spinand.h>
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#define SPINAND_MFR_FMSH 0xA1
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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 fm25s01a_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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return -ERANGE;
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}
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static int fm25s01a_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)
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return -ERANGE;
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region->offset = 2;
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region->length = 62;
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return 0;
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}
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static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
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.ecc = fm25s01a_ooblayout_ecc,
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.rfree = fm25s01a_ooblayout_free,
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};
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static const struct spinand_info fmsh_spinand_table[] = {
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SPINAND_INFO("FM25S01A", 0xE4,
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NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
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NAND_ECCREQ(1, 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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0,
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SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
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};
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/**
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* fmsh_spinand_detect - initialize device related part in spinand_device
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* struct if it is a FMSH device.
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* @spinand: SPI NAND device structure
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*/
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static int fmsh_spinand_detect(struct spinand_device *spinand)
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{
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u8 *id = spinand->id.data;
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int ret;
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/*
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* FMSH SPI NAND read ID need a dummy byte,
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* so the first byte in raw_id is dummy.
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*/
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if (id[1] != SPINAND_MFR_FMSH)
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return 0;
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ret = spinand_match_and_init(spinand, fmsh_spinand_table,
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ARRAY_SIZE(fmsh_spinand_table), id[2]);
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if (ret)
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return ret;
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return 1;
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}
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static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
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.detect = fmsh_spinand_detect,
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};
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const struct spinand_manufacturer fmsh_spinand_manufacturer = {
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.id = SPINAND_MFR_FMSH,
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.name = "FMSH",
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.ops = &fmsh_spinand_manuf_ops,
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};
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