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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (c) 2016-2017 Micron Technology, Inc.
- *
- * Authors:
- * Peter Pan <peterpandong@micron.com>
- */
- #ifndef __UBOOT__
- #include <malloc.h>
- #include <linux/device.h>
- #include <linux/kernel.h>
- #endif
- #include <linux/bitops.h>
- #include <linux/mtd/spinand.h>
- #define SPINAND_MFR_MICRON 0x2c
- #define MICRON_STATUS_ECC_MASK GENMASK(7, 4)
- #define MICRON_STATUS_ECC_NO_BITFLIPS (0 << 4)
- #define MICRON_STATUS_ECC_1TO3_BITFLIPS (1 << 4)
- #define MICRON_STATUS_ECC_4TO6_BITFLIPS (3 << 4)
- #define MICRON_STATUS_ECC_7TO8_BITFLIPS (5 << 4)
- #define MICRON_CFG_CR BIT(0)
- static SPINAND_OP_VARIANTS(read_cache_variants,
- SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
- SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
- static SPINAND_OP_VARIANTS(write_cache_variants,
- SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
- SPINAND_PROG_LOAD(true, 0, NULL, 0));
- static SPINAND_OP_VARIANTS(update_cache_variants,
- SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
- SPINAND_PROG_LOAD(false, 0, NULL, 0));
- static int micron_8_ooblayout_ecc(struct mtd_info *mtd, int section,
- struct mtd_oob_region *region)
- {
- if (section)
- return -ERANGE;
- region->offset = mtd->oobsize / 2;
- region->length = mtd->oobsize / 2;
- return 0;
- }
- static int micron_8_ooblayout_free(struct mtd_info *mtd, int section,
- struct mtd_oob_region *region)
- {
- if (section)
- return -ERANGE;
- /* Reserve 2 bytes for the BBM. */
- region->offset = 2;
- region->length = (mtd->oobsize / 2) - 2;
- return 0;
- }
- static const struct mtd_ooblayout_ops micron_8_ooblayout = {
- .ecc = micron_8_ooblayout_ecc,
- .rfree = micron_8_ooblayout_free,
- };
- static int micron_8_ecc_get_status(struct spinand_device *spinand,
- u8 status)
- {
- switch (status & MICRON_STATUS_ECC_MASK) {
- case STATUS_ECC_NO_BITFLIPS:
- return 0;
- case STATUS_ECC_UNCOR_ERROR:
- return -EBADMSG;
- case MICRON_STATUS_ECC_1TO3_BITFLIPS:
- return 3;
- case MICRON_STATUS_ECC_4TO6_BITFLIPS:
- return 6;
- case MICRON_STATUS_ECC_7TO8_BITFLIPS:
- return 8;
- default:
- break;
- }
- return -EINVAL;
- }
- static const struct spinand_info micron_spinand_table[] = {
- /* M79A 2Gb 3.3V */
- SPINAND_INFO("MT29F2G01ABAGD", 0x24,
- NAND_MEMORG(1, 2048, 128, 64, 2048, 2, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(µn_8_ooblayout,
- micron_8_ecc_get_status)),
- /* M79A 2Gb 1.8V */
- SPINAND_INFO("MT29F2G01ABBGD", 0x25,
- NAND_MEMORG(1, 2048, 128, 64, 2048, 2, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(µn_8_ooblayout,
- micron_8_ecc_get_status)),
- /* M78A 1Gb 3.3V */
- SPINAND_INFO("MT29F1G01ABAFD", 0x14,
- NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(µn_8_ooblayout,
- micron_8_ecc_get_status)),
- /* M78A 1Gb 1.8V */
- SPINAND_INFO("MT29F1G01ABAFD", 0x15,
- NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(µn_8_ooblayout,
- micron_8_ecc_get_status)),
- };
- static int micron_spinand_detect(struct spinand_device *spinand)
- {
- u8 *id = spinand->id.data;
- int ret;
- /*
- * Micron SPI NAND read ID need a dummy byte,
- * so the first byte in raw_id is dummy.
- */
- if (id[1] != SPINAND_MFR_MICRON)
- return 0;
- ret = spinand_match_and_init(spinand, micron_spinand_table,
- ARRAY_SIZE(micron_spinand_table), id[2]);
- if (ret)
- return ret;
- return 1;
- }
- static int micron_spinand_init(struct spinand_device *spinand)
- {
- /*
- * M70A device series enable Continuous Read feature at Power-up,
- * which is not supported. Disable this bit to avoid any possible
- * failure.
- */
- if (spinand->flags & SPINAND_HAS_CR_FEAT_BIT)
- return spinand_upd_cfg(spinand, MICRON_CFG_CR, 0);
- return 0;
- }
- static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
- .detect = micron_spinand_detect,
- .init = micron_spinand_init,
- };
- const struct spinand_manufacturer micron_spinand_manufacturer = {
- .id = SPINAND_MFR_MICRON,
- .name = "Micron",
- .ops = µn_spinand_manuf_ops,
- };
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