mtd: spinand: add support for FudanMicro FM25S01A

Add support for FudanMicro FM25S01A SPI NAND.

This driver is ported from linux v6.18 and tested on a MT7981 board.

Link: https://lore.kernel.org/linux-mtd/20250824170013.3328777-1-cnsztl@gmail.com/
Reviewed-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Tianling Shen <cnsztl@gmail.com>

diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index 152aa1a3783c9e66605adc61f9f26ddf5c087953..a7a0b2cb4b9e6d0dccd9d152779ac587d00ea955 100644 (file)
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
 spinand-objs := core.o otp.o
-spinand-objs += alliancememory.o ato.o esmt.o foresee.o gigadevice.o macronix.o
+spinand-objs += alliancememory.o ato.o esmt.o fmsh.o foresee.o gigadevice.o macronix.o
 spinand-objs += micron.o paragon.o skyhigh.o toshiba.o winbond.o xtx.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 0c4350595469e48264fc3064d3766759f9844c41..14af42646122f4c597a48c251ca12233f265c7d8 100644 (file)
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1227,6 +1227,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = {
        &alliancememory_spinand_manufacturer,
        &ato_spinand_manufacturer,
        &esmt_c8_spinand_manufacturer,
+       &fmsh_spinand_manufacturer,
        &foresee_spinand_manufacturer,
        &gigadevice_spinand_manufacturer,
        &macronix_spinand_manufacturer,

diff --git a/drivers/mtd/nand/spi/fmsh.c b/drivers/mtd/nand/spi/fmsh.c
new file mode 100644 (file)
index 0000000..80837b7
--- /dev/null
+++ b/drivers/mtd/nand/spi/fmsh.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020-2021 Rockchip Electronics Co., Ltd.
+ *
+ * Author: Dingqiang Lin <jon.lin@rock-chips.com>
+ */
+
+#ifndef __UBOOT__
+#include <linux/device.h>
+#include <linux/kernel.h>
+#endif
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_FMSH               0xA1
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+               SPINAND_PAGE_READ_FROM_CACHE_1S_4S_4S_OP(0, 2, NULL, 0, 0),
+               SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
+               SPINAND_PAGE_READ_FROM_CACHE_1S_2S_2S_OP(0, 1, NULL, 0, 0),
+               SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
+               SPINAND_PAGE_READ_FROM_CACHE_FAST_1S_1S_1S_OP(0, 1, NULL, 0, 0),
+               SPINAND_PAGE_READ_FROM_CACHE_1S_1S_1S_OP(0, 1, NULL, 0, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_variants,
+               SPINAND_PROG_LOAD_1S_1S_4S_OP(true, 0, NULL, 0),
+               SPINAND_PROG_LOAD_1S_1S_1S_OP(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_variants,
+               SPINAND_PROG_LOAD_1S_1S_4S_OP(false, 0, NULL, 0),
+               SPINAND_PROG_LOAD_1S_1S_1S_OP(false, 0, NULL, 0));
+
+static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
+                                 struct mtd_oob_region *region)
+{
+       return -ERANGE;
+}
+
+static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
+                                  struct mtd_oob_region *region)
+{
+       if (section)
+               return -ERANGE;
+
+       region->offset = 2;
+       region->length = 62;
+
+       return 0;
+}
+
+static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
+       .ecc = fm25s01a_ooblayout_ecc,
+       .rfree = fm25s01a_ooblayout_free,
+};
+
+static const struct spinand_info fmsh_spinand_table[] = {
+       SPINAND_INFO("FM25S01A",
+                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
+                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
+                    NAND_ECCREQ(1, 512),
+                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+                                             &write_cache_variants,
+                                             &update_cache_variants),
+                    0,
+                    SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
+};
+
+static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer fmsh_spinand_manufacturer = {
+       .id = SPINAND_MFR_FMSH,
+       .name = "Fudan Micro",
+       .chips = fmsh_spinand_table,
+       .nchips = ARRAY_SIZE(fmsh_spinand_table),
+       .ops = &fmsh_spinand_manuf_ops,
+};

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index cf9b9656d054b9319d67369bbdcf8429795d38a1..e9561c0a39562e6d62a1d07e1e524db9eeee4aaf 100644 (file)
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -361,6 +361,7 @@ struct spinand_manufacturer {
 extern const struct spinand_manufacturer alliancememory_spinand_manufacturer;
 extern const struct spinand_manufacturer ato_spinand_manufacturer;
 extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
+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 macronix_spinand_manufacturer;