124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Stefan Roese <[email protected]>
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*
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* Derived from drivers/mtd/nand/spi/micron.c
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* Copyright (c) 2016-2017 Micron Technology, Inc.
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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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#include <linux/bitfield.h>
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#define SPINAND_MFR_HEYANGTEK 0xc9
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#define HEYANGTEK_STATUS_ECC_MASK GENMASK(5, 4)
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#define HEYANGTEK_STATUS_ECC_NO_BITFLIPS (0)
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#define HEYANGTEK_STATUS_ECC_1_13_BITFLIPS (1)
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#define HEYANGTEK_STATUS_ECC_UNCOR_ERROR (2)
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#define HEYANGTEK_STATUS_ECC_14_BITFLIPS (3)
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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 hyf4gq4iaacbe_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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/* Unable to know the layout of ECC */
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return -ERANGE;
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}
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static int hyf4gq4iaacbe_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 > 7)
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return -ERANGE;
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region->offset = (32 * section) + 4;
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region->length = 4;
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return 0;
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}
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static const struct mtd_ooblayout_ops hyf4gq4iaacbe_ooblayout = {
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.ecc = hyf4gq4iaacbe_ooblayout_ecc,
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.free = hyf4gq4iaacbe_ooblayout_free,
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};
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static int hyf4gq4iaacbe_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (FIELD_GET(STATUS_ECC_MASK, status)) {
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case HEYANGTEK_STATUS_ECC_NO_BITFLIPS:
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return 0;
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case HEYANGTEK_STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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/* It needs to be file system friendly and should not
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* cause frequent data block replacements. */
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case HEYANGTEK_STATUS_ECC_1_13_BITFLIPS:
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return 5;
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case HEYANGTEK_STATUS_ECC_14_BITFLIPS:
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return 14;
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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 const struct spinand_info heyangtek_spinand_table[] = {
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SPINAND_INFO("HYF4GQ4IAACBE 1.8v", 0x86,
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NAND_MEMORG(1, 4096, 256, 64, 2048, 1, 1, 1),
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NAND_ECCREQ(14, 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(&hyf4gq4iaacbe_ooblayout,
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hyf4gq4iaacbe_ecc_get_status)),
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};
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static int heyangtek_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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if (id[0] != SPINAND_MFR_HEYANGTEK)
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return 0;
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ret = spinand_match_and_init(spinand, heyangtek_spinand_table,
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ARRAY_SIZE(heyangtek_spinand_table),
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id + 1, 0);
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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 heyangtek_spinand_manuf_ops = {
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.detect = heyangtek_spinand_detect,
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};
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const struct spinand_manufacturer heyangtek_spinand_manufacturer = {
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.id = SPINAND_MFR_HEYANGTEK,
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.name = "heyangtek",
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.ops = &heyangtek_spinand_manuf_ops,
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};
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