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MEMREAD is a new ioctl for MTD character devices that was first included in Linux 6.1. It allows userspace applications to use the Linux kernel's OOB autoplacement mechanism while reading data from NAND devices. The Yafut tool needs this ioctl to do its job. Signed-off-by: Michał Kępień <openwrt@kempniu.pl>
123 lines
4.1 KiB
Diff
123 lines
4.1 KiB
Diff
From 5f49a5c9b16330e0df8f639310e4715dcad71947 Mon Sep 17 00:00:00 2001
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From: Davide Fioravanti <pantanastyle@gmail.com>
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Date: Fri, 8 Jan 2021 15:35:24 +0100
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Subject: [PATCH] mtd: spinand: Add support for the Fidelix FM35X1GA
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Datasheet: http://www.hobos.com.cn/upload/datasheet/DS35X1GAXXX_100_rev00.pdf
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Signed-off-by: Davide Fioravanti <pantanastyle@gmail.com>
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---
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drivers/mtd/nand/spi/Makefile | 2 +-
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drivers/mtd/nand/spi/core.c | 1 +
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drivers/mtd/nand/spi/fidelix.c | 76 ++++++++++++++++++++++++++++++++++
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include/linux/mtd/spinand.h | 1 +
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4 files changed, 79 insertions(+), 1 deletion(-)
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create mode 100644 drivers/mtd/nand/spi/fidelix.c
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--- a/drivers/mtd/nand/spi/Makefile
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+++ b/drivers/mtd/nand/spi/Makefile
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@@ -1,3 +1,3 @@
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# SPDX-License-Identifier: GPL-2.0
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-spinand-objs := core.o esmt.o etron.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
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+spinand-objs := core.o esmt.o etron.o fidelix.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
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obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
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--- a/drivers/mtd/nand/spi/core.c
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+++ b/drivers/mtd/nand/spi/core.c
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@@ -939,6 +939,7 @@ static const struct nand_ops spinand_ops
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static const struct spinand_manufacturer *spinand_manufacturers[] = {
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&esmt_c8_spinand_manufacturer,
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+ &fidelix_spinand_manufacturer,
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&gigadevice_spinand_manufacturer,
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&etron_spinand_manufacturer,
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¯onix_spinand_manufacturer,
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--- /dev/null
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+++ b/drivers/mtd/nand/spi/fidelix.c
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@@ -0,0 +1,76 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Copyright (c) 2020 Davide Fioravanti <pantanastyle@gmail.com>
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+ */
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+
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+#include <linux/device.h>
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+#include <linux/kernel.h>
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+#include <linux/mtd/spinand.h>
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+
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+#define SPINAND_MFR_FIDELIX 0xE5
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+#define FIDELIX_ECCSR_MASK 0x0F
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+
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+static SPINAND_OP_VARIANTS(read_cache_variants,
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+ SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
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+ SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
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+
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+static SPINAND_OP_VARIANTS(write_cache_variants,
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+ SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
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+ SPINAND_PROG_LOAD(true, 0, NULL, 0));
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+
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+static SPINAND_OP_VARIANTS(update_cache_variants,
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+ SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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+ SPINAND_PROG_LOAD(false, 0, NULL, 0));
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+
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+static int fm35x1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
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+ struct mtd_oob_region *region)
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+{
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+ if (section > 3)
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+ return -ERANGE;
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+
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+ region->offset = (16 * section) + 8;
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+ region->length = 8;
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+
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+ return 0;
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+}
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+
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+static int fm35x1ga_ooblayout_free(struct mtd_info *mtd, int section,
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+ struct mtd_oob_region *region)
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+{
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+ if (section > 3)
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+ return -ERANGE;
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+
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+ region->offset = (16 * section) + 2;
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+ region->length = 6;
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+
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+ return 0;
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+}
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+
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+static const struct mtd_ooblayout_ops fm35x1ga_ooblayout = {
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+ .ecc = fm35x1ga_ooblayout_ecc,
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+ .free = fm35x1ga_ooblayout_free,
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+};
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+
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+static const struct spinand_info fidelix_spinand_table[] = {
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+ SPINAND_INFO("FM35X1GA",
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+ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),
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+ NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
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+ NAND_ECCREQ(4, 512),
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+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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+ &write_cache_variants,
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+ &update_cache_variants),
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+ SPINAND_HAS_QE_BIT,
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+ SPINAND_ECCINFO(&fm35x1ga_ooblayout, NULL)),
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+};
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+
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+static const struct spinand_manufacturer_ops fidelix_spinand_manuf_ops = {
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+};
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+
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+const struct spinand_manufacturer fidelix_spinand_manufacturer = {
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+ .id = SPINAND_MFR_FIDELIX,
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+ .name = "Fidelix",
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+ .chips = fidelix_spinand_table,
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+ .nchips = ARRAY_SIZE(fidelix_spinand_table),
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+ .ops = &fidelix_spinand_manuf_ops,
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+};
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--- a/include/linux/mtd/spinand.h
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+++ b/include/linux/mtd/spinand.h
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@@ -262,6 +262,7 @@ struct spinand_manufacturer {
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/* SPI NAND manufacturers */
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extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
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extern const struct spinand_manufacturer etron_spinand_manufacturer;
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+extern const struct spinand_manufacturer fidelix_spinand_manufacturer;
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extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
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extern const struct spinand_manufacturer macronix_spinand_manufacturer;
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extern const struct spinand_manufacturer micron_spinand_manufacturer;
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