From fea785563f16e9336da918838bfe591f860d8f58 Mon Sep 17 00:00:00 2001 From: Jon Lin Date: Sun, 17 Oct 2021 10:31:46 +0800 Subject: [PATCH] mtd: spinand: Support jsc JS28U1GQSCAHG-83 Change-Id: Idf5062e23ccf1174c4f3096d86ce1975dc6b5c19 Signed-off-by: Jon Lin --- drivers/mtd/nand/spi/Makefile | 2 +- drivers/mtd/nand/spi/core.c | 1 + drivers/mtd/nand/spi/jsc.c | 104 ++++++++++++++++++++++++++++++++++ include/linux/mtd/spinand.h | 1 + 4 files changed, 107 insertions(+), 1 deletion(-) create mode 100644 drivers/mtd/nand/spi/jsc.c diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile index 00aeca8aec3c..df5a437864f8 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 := biwin.o core.o dosilicon.o esmt.o etron.o fmsh.o foresee.o gigadevice.o hyf.o macronix.o micron.o paragon.o toshiba.o winbond.o +spinand-objs := biwin.o core.o dosilicon.o esmt.o etron.o fmsh.o foresee.o gigadevice.o hyf.o jsc.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 58c16da80a7a..cff87545295f 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -857,6 +857,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = { &foresee_spinand_manufacturer, &gigadevice_spinand_manufacturer, &hyf_spinand_manufacturer, + &jsc_spinand_manufacturer, ¯onix_spinand_manufacturer, µn_spinand_manufacturer, ¶gon_spinand_manufacturer, diff --git a/drivers/mtd/nand/spi/jsc.c b/drivers/mtd/nand/spi/jsc.c new file mode 100644 index 000000000000..93fed1c40675 --- /dev/null +++ b/drivers/mtd/nand/spi/jsc.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021 Rockchip Electronics Co., Ltd + * + * Authors: + * Dingqiang Lin + */ + +#include +#include +#include + +#define SPINAND_MFR_JSC 0xBF + +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 js28u1gqscahg_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 js28u1gqscahg_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 js28u1gqscahg_ooblayout = { + .ecc = js28u1gqscahg_ooblayout_ecc, + .free = js28u1gqscahg_ooblayout_free, +}; + +/* + * ecc bits: 0xC0[4,6] + * [0b000], No bit errors were detected; + * [0b001, 0b011], 1~3 Bit errors were detected and corrected. Not + * reach Flipping Bits; + * [0b100], Bit error count equals the bit flip + * detection threshold + * others, Reserved. + */ +static int js28u1gqscahg_ecc_get_status(struct spinand_device *spinand, + u8 status) +{ + u8 eccsr = (status & GENMASK(6, 4)) >> 2; + + if (eccsr <= 7) + return eccsr; + else if (eccsr == 12) + return 8; + else + return -EBADMSG; +} + +static const struct spinand_info jsc_spinand_table[] = { + SPINAND_INFO("JS28U1GQSCAHG-83", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x21), + 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(&js28u1gqscahg_ooblayout, js28u1gqscahg_ecc_get_status)), +}; + +static const struct spinand_manufacturer_ops jsc_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer jsc_spinand_manufacturer = { + .id = SPINAND_MFR_JSC, + .name = "JSC", + .chips = jsc_spinand_table, + .nchips = ARRAY_SIZE(jsc_spinand_table), + .ops = &jsc_spinand_manuf_ops, +}; diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index eef6f2a69b86..ba55edd5e96f 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -246,6 +246,7 @@ extern const struct spinand_manufacturer fmsh_spinand_manufacturer; extern const struct spinand_manufacturer foresee_spinand_manufacturer; extern const struct spinand_manufacturer gigadevice_spinand_manufacturer; extern const struct spinand_manufacturer hyf_spinand_manufacturer; +extern const struct spinand_manufacturer jsc_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;