Add support for the Foresee FS35ND01G-S1Y2 manufactured by Longsys. Signed-off-by: Daniel Palmer <dan...@0x0f.com>
Link: https://datasheet.lcsc.com/szlcsc/2008121142_FORESEE-FS35ND01G-S1Y2QWFI000_C719495.pdf --- drivers/mtd/nand/spi/Makefile | 2 +- drivers/mtd/nand/spi/core.c | 1 + drivers/mtd/nand/spi/longsys.c | 86 ++++++++++++++++++++++++++++++++++ include/linux/mtd/spinand.h | 1 + 4 files changed, 89 insertions(+), 1 deletion(-) create mode 100644 drivers/mtd/nand/spi/longsys.c diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile index 9662b9c1d5a9..1d6819022e43 100644 --- 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 gigadevice.o longsys.o macronix.o micron.o paragon.o toshiba.o winbond.o obj-$(CONFIG_MTD_SPI_NAND) += spinand.o diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 61d932c1b718..8c36f0f6b1c9 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -864,6 +864,7 @@ static const struct nand_ops spinand_ops = { static const struct spinand_manufacturer *spinand_manufacturers[] = { &gigadevice_spinand_manufacturer, + &longsys_spinand_manufacturer, ¯onix_spinand_manufacturer, µn_spinand_manufacturer, ¶gon_spinand_manufacturer, diff --git a/drivers/mtd/nand/spi/longsys.c b/drivers/mtd/nand/spi/longsys.c new file mode 100644 index 000000000000..418bd5a1f20d --- /dev/null +++ b/drivers/mtd/nand/spi/longsys.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 Daniel Palmer <dan...@thingy.jp> + * + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/mtd/spinand.h> + +#define SPINAND_MFR_LONGSYS 0xCD + +static SPINAND_OP_VARIANTS(read_cache_variants, + 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(true, 0, NULL, 0)); + +static SPINAND_OP_VARIANTS(update_cache_variants, + SPINAND_PROG_LOAD(false, 0, NULL, 0)); + +static int fs35nd01g_s1y2_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + /* ECC is not user accessible */ + region->offset = 0; + region->length = 0; + + return 0; +} + +static int fs35nd01g_s1y2_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + /* + * No ECC data is stored in the accessible OOB so the full 16 bytes + * of each spare region is available to the user. Apparently also + * covered by the internal ECC. + */ + if (section) { + region->offset = 16 * section; + region->length = 16; + } else { + /* First byte in spare0 area is used for bad block marker */ + region->offset = 1; + region->length = 15; + } + + return 0; +} + +static const struct mtd_ooblayout_ops fs35nd01g_s1y2_ooblayout = { + .ecc = fs35nd01g_s1y2_ooblayout_ecc, + .free = fs35nd01g_s1y2_ooblayout_free, +}; + +static const struct spinand_info longsys_spinand_table[] = { + SPINAND_INFO("FS35ND01G-S1Y2", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xEA, 0x11), + 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(&fs35nd01g_s1y2_ooblayout, + NULL)), +}; + +static const struct spinand_manufacturer_ops longsys_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer longsys_spinand_manufacturer = { + .id = SPINAND_MFR_LONGSYS, + .name = "Longsys", + .chips = longsys_spinand_table, + .nchips = ARRAY_SIZE(longsys_spinand_table), + .ops = &longsys_spinand_manuf_ops, +}; diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 6bb92f26833e..8651e63a2f8a 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -239,6 +239,7 @@ struct spinand_manufacturer { /* SPI NAND manufacturers */ extern const struct spinand_manufacturer gigadevice_spinand_manufacturer; +extern const struct spinand_manufacturer longsys_spinand_manufacturer; extern const struct spinand_manufacturer macronix_spinand_manufacturer; extern const struct spinand_manufacturer micron_spinand_manufacturer; extern const struct spinand_manufacturer paragon_spinand_manufacturer; -- 2.30.0.rc2
