From ea0df4552efcdcc2806fe6eba0540b5f719d80b6 Mon Sep 17 00:00:00 2001 From: Davide Fioravanti Date: Fri, 8 Jan 2021 15:35:24 +0100 Subject: [PATCH 1/1] mtd: spinand: Add support for the Fidelix FM35X1GA Datasheet: http://www.hobos.com.cn/upload/datasheet/DS35X1GAXXX_100_rev00.pdf Signed-off-by: Davide Fioravanti --- drivers/mtd/nand/spi/Makefile | 2 +- drivers/mtd/nand/spi/core.c | 1 + drivers/mtd/nand/spi/fidelix.c | 80 ++++++++++++++++++++++++++++++++++ include/linux/mtd/spinand.h | 1 + 4 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 drivers/mtd/nand/spi/fidelix.c --- a/drivers/mtd/nand/spi/Makefile +++ b/drivers/mtd/nand/spi/Makefile @@ -1,3 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 -spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o +spinand-objs := core.o fidelix.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o obj-$(CONFIG_MTD_SPI_NAND) += spinand.o --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -755,6 +755,7 @@ static const struct nand_ops spinand_ops }; static const struct spinand_manufacturer *spinand_manufacturers[] = { + &fidelix_spinand_manufacturer, &gigadevice_spinand_manufacturer, ¯onix_spinand_manufacturer, µn_spinand_manufacturer, --- /dev/null +++ b/drivers/mtd/nand/spi/fidelix.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 Davide Fioravanti + */ + +#include +#include +#include + +#define SPINAND_MFR_FIDELIX 0xE5 +#define FIDELIX_ECCSR_MASK 0x0F + +static SPINAND_OP_VARIANTS(read_cache_variants, + SPINAND_PAGE_READ_FROM_CACHE_X4_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 fm35x1ga_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + region->offset = (16 * section) + 8; + region->length = 8; + + return 0; +} + +static int fm35x1ga_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + region->offset = (16 * section) + 2; + region->length = 6; + + return 0; +} + +static const struct mtd_ooblayout_ops fm35x1ga_ooblayout = { + .ecc = fm35x1ga_ooblayout_ecc, + .free = fm35x1ga_ooblayout_free, +}; + +static const struct spinand_info fidelix_spinand_table[] = { + SPINAND_INFO("FM35X1GA", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71), + NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), + NAND_ECCREQ(4, 512), + SPINAND_INFO_OP_VARIANTS(&read_cache_variants, + &write_cache_variants, + &update_cache_variants), + SPINAND_HAS_QE_BIT, + SPINAND_ECCINFO(&fm35x1ga_ooblayout, NULL)), +}; + +static const struct spinand_manufacturer_ops fidelix_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer fidelix_spinand_manufacturer = { + .id = SPINAND_MFR_FIDELIX, + .name = "Fidelix", + .chips = fidelix_spinand_table, + .nchips = ARRAY_SIZE(fidelix_spinand_table), + .ops = &fidelix_spinand_manuf_ops, +}; --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -238,6 +238,7 @@ struct spinand_manufacturer { }; /* SPI NAND manufacturers */ +extern const struct spinand_manufacturer fidelix_spinand_manufacturer; extern const struct spinand_manufacturer gigadevice_spinand_manufacturer; extern const struct spinand_manufacturer macronix_spinand_manufacturer; extern const struct spinand_manufacturer micron_spinand_manufacturer;