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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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377e517b5f
NAND datasheets usually give the maximum number of bad blocks per LUN and this number can be used to help upper layers decide how much blocks they should reserve for bad block handling. Add a max_bad_eraseblocks_per_lun to the nand_memory_organization struct and update the NAND_MEMORG() macro (and its users) accordingly. We also provide a default mtd->_max_bad_blocks() implementation. Signed-off-by: Boris Brezillon <bbrezillon@kernel.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016-2017 Micron Technology, Inc.
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*
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* Authors:
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* Peter Pan <peterpandong@micron.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 SPINAND_MFR_MICRON 0x2c
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#define MICRON_STATUS_ECC_MASK GENMASK(7, 4)
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#define MICRON_STATUS_ECC_NO_BITFLIPS (0 << 4)
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#define MICRON_STATUS_ECC_1TO3_BITFLIPS (1 << 4)
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#define MICRON_STATUS_ECC_4TO6_BITFLIPS (3 << 4)
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#define MICRON_STATUS_ECC_7TO8_BITFLIPS (5 << 4)
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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 mt29f2g01abagd_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 mt29f2g01abagd_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 = 62;
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return 0;
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}
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static const struct mtd_ooblayout_ops mt29f2g01abagd_ooblayout = {
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.ecc = mt29f2g01abagd_ooblayout_ecc,
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.free = mt29f2g01abagd_ooblayout_free,
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};
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static int mt29f2g01abagd_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (status & MICRON_STATUS_ECC_MASK) {
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case STATUS_ECC_NO_BITFLIPS:
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return 0;
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case STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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case MICRON_STATUS_ECC_1TO3_BITFLIPS:
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return 3;
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case MICRON_STATUS_ECC_4TO6_BITFLIPS:
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return 6;
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case MICRON_STATUS_ECC_7TO8_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 micron_spinand_table[] = {
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SPINAND_INFO("MT29F2G01ABAGD", 0x24,
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NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 2, 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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0,
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SPINAND_ECCINFO(&mt29f2g01abagd_ooblayout,
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mt29f2g01abagd_ecc_get_status)),
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};
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static int micron_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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/*
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* Micron SPI NAND read ID need a dummy byte,
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* so the first byte in raw_id is dummy.
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*/
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if (id[1] != SPINAND_MFR_MICRON)
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return 0;
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ret = spinand_match_and_init(spinand, micron_spinand_table,
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ARRAY_SIZE(micron_spinand_table), id[2]);
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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 micron_spinand_manuf_ops = {
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.detect = micron_spinand_detect,
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};
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const struct spinand_manufacturer micron_spinand_manufacturer = {
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.id = SPINAND_MFR_MICRON,
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.name = "Micron",
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.ops = µn_spinand_manuf_ops,
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};
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