121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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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_ICTHINK 0x20
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#define ICTHINK_STATUS_ECC_NO_BITFLIPS (0)
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#define ICTHINK_STATUS_ECC_1_7_BITFLIPS (1)
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#define ICTHINK_STATUS_ECC_UNCOR_ERROR (2)
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#define ICTHINK_STATUS_ECC_8_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 xs25d4gasl_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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/* invisible and inaccessible */
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return -ERANGE;
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}
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static int xs25d4gasl_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 = 48;
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return 0;
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}
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static const struct mtd_ooblayout_ops xs25d4gasl_ooblayout = {
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.ecc = xs25d4gasl_ooblayout_ecc,
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.free = xs25d4gasl_ooblayout_free,
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};
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static int xs25d4gasl_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 ICTHINK_STATUS_ECC_NO_BITFLIPS:
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return 0;
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case ICTHINK_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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*/
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case ICTHINK_STATUS_ECC_1_7_BITFLIPS:
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return 4;
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case ICTHINK_STATUS_ECC_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 const struct spinand_info icthink_spinand_table[] = {
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SPINAND_INFO("XS25D4GASL 3.3v", 0x04,
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NAND_MEMORG(1, 2048, 64, 128, 2048, 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(&xs25d4gasl_ooblayout,
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xs25d4gasl_ecc_get_status)),
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};
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static int icthink_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_ICTHINK)
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return 0;
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ret = spinand_match_and_init(spinand, icthink_spinand_table,
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ARRAY_SIZE(icthink_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 icthink_spinand_manuf_ops = {
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.detect = icthink_spinand_detect,
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};
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const struct spinand_manufacturer icthink_spinand_manufacturer = {
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.id = SPINAND_MFR_ICTHINK,
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.name = "icthink",
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.ops = &icthink_spinand_manuf_ops,
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};
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