107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2021 Rockchip Electronics Co., Ltd
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*
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* Authors:
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* 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_JSC 0xBF
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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 js28u1gqscahg_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 = mtd->oobsize / 2;
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region->length = mtd->oobsize / 2;
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return 0;
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}
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static int js28u1gqscahg_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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/* Reserve 2 bytes for the BBM. */
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region->offset = 2;
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region->length = mtd->oobsize / 2 - 2;
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return 0;
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}
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static const struct mtd_ooblayout_ops js28u1gqscahg_ooblayout = {
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.ecc = js28u1gqscahg_ooblayout_ecc,
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.rfree = js28u1gqscahg_ooblayout_free,
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};
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/*
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* ecc bits: 0xC0[4,6]
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* [0b000], No bit errors were detected;
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* [0b001, 0b011], 1~3 Bit errors were detected and corrected. Not
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* reach Flipping Bits;
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* [0b100], Bit error count equals the bit flip
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* detection threshold
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* others, Reserved.
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*/
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static int js28u1gqscahg_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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u8 eccsr = (status & GENMASK(6, 4)) >> 2;
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if (eccsr <= 7)
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return eccsr;
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else if (eccsr == 12)
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return 8;
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else
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return -EBADMSG;
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}
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static const struct spinand_info jsc_spinand_table[] = {
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SPINAND_INFO("JS28U1GQSCAHG-83",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x21),
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NAND_MEMORG(1, 2048, 64, 64, 1024, 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(&js28u1gqscahg_ooblayout, js28u1gqscahg_ecc_get_status)),
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};
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static const struct spinand_manufacturer_ops jsc_spinand_manuf_ops = {
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};
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const struct spinand_manufacturer jsc_spinand_manufacturer = {
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.id = SPINAND_MFR_JSC,
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.name = "JSC",
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.chips = jsc_spinand_table,
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.nchips = ARRAY_SIZE(jsc_spinand_table),
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.ops = &jsc_spinand_manuf_ops,
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};
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