mtd: spinand: add support for FORESEE F35SQA002G

Add support for FORESEE F35SQA002G SPI NAND.
Datasheet:
  https://www.longsys.com/uploads/LM-00006FORESEEF35SQA002GDatasheet_1650183701.pdf

Signed-off-by: Martin Kurbanov <mmkurbanov@salutedevices.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20231002140458.147605-1-mmkurbanov@salutedevices.com

diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index cd8b66bf77405cae2cb0fa311802cc05e1ee44da..19cc77288ebbcabfd71c8ed094095f4bc3f29e0c 100644 (file)
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-spinand-objs := core.o alliancememory.o ato.o esmt.o gigadevice.o macronix.o
+spinand-objs := core.o alliancememory.o ato.o esmt.o foresee.o gigadevice.o macronix.o
 spinand-objs += micron.o paragon.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 393ff37f0d23c15567765457a248ac9c0cbbdb77..849ccfedbc72dfb27cd6277d3cacc90a6289c66d 100644 (file)
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -940,6 +940,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = {
        &alliancememory_spinand_manufacturer,
        &ato_spinand_manufacturer,
        &esmt_c8_spinand_manufacturer,
+       &foresee_spinand_manufacturer,
        &gigadevice_spinand_manufacturer,
        &macronix_spinand_manufacturer,
        &micron_spinand_manufacturer,

diff --git a/drivers/mtd/nand/spi/foresee.c b/drivers/mtd/nand/spi/foresee.c
new file mode 100644 (file)
index 0000000..e0d2d92
--- /dev/null
+++ b/drivers/mtd/nand/spi/foresee.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2023, SberDevices. All Rights Reserved.
+ *
+ * Author: Martin Kurbanov <mmkurbanov@salutedevices.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_FORESEE            0xCD
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+               SPINAND_PAGE_READ_FROM_CACHE_X4_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 f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section,
+                                   struct mtd_oob_region *region)
+{
+       return -ERANGE;
+}
+
+static int f35sqa002g_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 = 62;
+
+       return 0;
+}
+
+static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = {
+       .ecc = f35sqa002g_ooblayout_ecc,
+       .free = f35sqa002g_ooblayout_free,
+};
+
+static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status)
+{
+       struct nand_device *nand = spinand_to_nand(spinand);
+
+       switch (status & STATUS_ECC_MASK) {
+       case STATUS_ECC_NO_BITFLIPS:
+               return 0;
+
+       case STATUS_ECC_HAS_BITFLIPS:
+               return nanddev_get_ecc_conf(nand)->strength;
+
+       default:
+               break;
+       }
+
+       /* More than 1-bit error was detected in one or more sectors and
+        * cannot be corrected.
+        */
+       return -EBADMSG;
+}
+
+static const struct spinand_info foresee_spinand_table[] = {
+       SPINAND_INFO("F35SQA002G",
+                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72),
+                    NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
+                    NAND_ECCREQ(1, 512),
+                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+                                             &write_cache_variants,
+                                             &update_cache_variants),
+                    SPINAND_HAS_QE_BIT,
+                    SPINAND_ECCINFO(&f35sqa002g_ooblayout,
+                                    f35sqa002g_ecc_get_status)),
+};
+
+static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer foresee_spinand_manufacturer = {
+       .id = SPINAND_MFR_FORESEE,
+       .name = "FORESEE",
+       .chips = foresee_spinand_table,
+       .nchips = ARRAY_SIZE(foresee_spinand_table),
+       .ops = &foresee_spinand_manuf_ops,
+};

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 3e285c09d16d95dba7271a53ee3e3d7cf73bc107..badb4c1ac079e87dd9c1cd439220698b02553e4f 100644 (file)
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -263,6 +263,7 @@ 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 foresee_spinand_manufacturer;
 extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 extern const struct spinand_manufacturer micron_spinand_manufacturer;