Hi Daniel, Daniel Palmer <dan...@0x0f.com> wrote on Sat, 13 Feb 2021 18:57:24 +0900:
> 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 > --- Can you please add a changelog here when you send a new version of a patch? > 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. How is this even possible? ECC must be stored somewhere, maybe it is not possible to retrieve it but I guess you cannot use the 32 bytes of OOB for user data. Can you please verify that? > + */ > + 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; Thanks, Miquèl
