mirror of https://github.com/torvalds/linux.git
147 lines
3.9 KiB
C
147 lines
3.9 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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#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 FM25S01BI3_STATUS_ECC_MASK (7 << 4)
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#define FM25S01BI3_STATUS_ECC_NO_BITFLIPS (0 << 4)
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#define FM25S01BI3_STATUS_ECC_1_3_BITFLIPS (1 << 4)
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#define FM25S01BI3_STATUS_ECC_UNCOR_ERROR (2 << 4)
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#define FM25S01BI3_STATUS_ECC_4_6_BITFLIPS (3 << 4)
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#define FM25S01BI3_STATUS_ECC_7_8_BITFLIPS (5 << 4)
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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 int fm25s01bi3_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (status & FM25S01BI3_STATUS_ECC_MASK) {
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case FM25S01BI3_STATUS_ECC_NO_BITFLIPS:
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return 0;
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case FM25S01BI3_STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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case FM25S01BI3_STATUS_ECC_1_3_BITFLIPS:
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return 3;
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case FM25S01BI3_STATUS_ECC_4_6_BITFLIPS:
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return 6;
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case FM25S01BI3_STATUS_ECC_7_8_BITFLIPS:
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return 8;
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default:
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break;
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}
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return -EINVAL;
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}
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static int fm25s01bi3_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)
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return -ERANGE;
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region->offset = 64;
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region->length = 64;
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return 0;
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}
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static int fm25s01bi3_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) + 4;
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region->length = 12;
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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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.free = fm25s01a_ooblayout_free,
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};
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static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout = {
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.ecc = fm25s01bi3_ooblayout_ecc,
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.free = fm25s01bi3_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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SPINAND_HAS_QE_BIT,
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SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
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SPINAND_INFO("FM25S01BI3",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xd4),
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NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
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NAND_ECCREQ(8, 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(&fm25s01bi3_ooblayout,
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fm25s01bi3_ecc_get_status)),
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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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