// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2016-2017 Micron Technology, Inc. * * Authors: * Peter Pan */ #include #include #include #define SPINAND_MFR_MICRON 0x2c #define MICRON_STATUS_ECC_MASK GENMASK(6, 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) 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 mt29f2g01abagd_ooblayout_ecc(struct mtd_info *mtd, int section, struct mtd_oob_region *region) { if (section) return -ERANGE; region->offset = 64; region->length = 64; return 0; } static int mt29f2g01abagd_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 = 62; return 0; } static const struct mtd_ooblayout_ops mt29f2g01abagd_ooblayout = { .ecc = mt29f2g01abagd_ooblayout_ecc, .free = mt29f2g01abagd_ooblayout_free, }; static int mt29f2g01abagd_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[] = { 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(&mt29f2g01abagd_ooblayout, mt29f2g01abagd_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 const struct spinand_manufacturer_ops micron_spinand_manuf_ops = { .detect = micron_spinand_detect, }; const struct spinand_manufacturer micron_spinand_manufacturer = { .id = SPINAND_MFR_MICRON, .name = "Micron", .ops = µn_spinand_manuf_ops, };