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8b984b5a39
Add support for FudanMicro FM25S01A SPI NAND. This driver is ported from linux v6.18 and tested on a MT7981 board. Link: https://lore.kernel.org/linux-mtd/20250824170013.3328777-1-cnsztl@gmail.com/ Reviewed-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu> Signed-off-by: Tianling Shen <cnsztl@gmail.com>
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020-2021 Rockchip Electronics Co., Ltd.
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*
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* Author: Dingqiang Lin <jon.lin@rock-chips.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_1S_4S_4S_OP(0, 2, NULL, 0, 0),
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SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
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SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0, 0),
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SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
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SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),
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SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));
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static SPINAND_OP_VARIANTS(write_cache_variants,
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SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
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SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
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static SPINAND_OP_VARIANTS(update_cache_variants,
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SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
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SPINAND_PROG_LOAD_1S_1S_1S_OP(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",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
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NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 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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static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
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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 = "Fudan Micro",
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.chips = fmsh_spinand_table,
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.nchips = ARRAY_SIZE(fmsh_spinand_table),
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.ops = &fmsh_spinand_manuf_ops,
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};
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