mtd: nand: spi: Add Gigadevice SPI NAND support
This patch adds support for Gigadevices SPI NAND device to the new SPI
NAND infrastructure in U-Boot. Currently only the 128MiB GD5F1GQ4UC
device is supported.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Jagan Teki <jagan@openedev.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jagan Teki <jagan@openedev.com>
diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index a66edd9..dd6baca 100644
--- 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 macronix.o micron.o winbond.o
+spinand-objs := core.o gigadevice.o macronix.o micron.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 362d104..cb8ffa3 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -830,6 +830,7 @@
};
static const struct spinand_manufacturer *spinand_manufacturers[] = {
+ &gigadevice_spinand_manufacturer,
¯onix_spinand_manufacturer,
µn_spinand_manufacturer,
&winbond_spinand_manufacturer,
diff --git a/drivers/mtd/nand/spi/gigadevice.c b/drivers/mtd/nand/spi/gigadevice.c
new file mode 100644
index 0000000..0bade20
--- /dev/null
+++ b/drivers/mtd/nand/spi/gigadevice.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ *
+ * Derived from drivers/mtd/nand/spi/micron.c
+ * Copyright (c) 2016-2017 Micron Technology, Inc.
+ */
+
+#ifndef __UBOOT__
+#include <linux/device.h>
+#include <linux/kernel.h>
+#endif
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_GIGADEVICE 0xc8
+
+#define GIGADEVICE_STATUS_ECC_MASK GENMASK(5, 4)
+#define GIGADEVICE_STATUS_ECC_NO_BITFLIPS (0 << 4)
+#define GIGADEVICE_STATUS_ECC_1TO7_BITFLIPS (1 << 4)
+#define GIGADEVICE_STATUS_ECC_8_BITFLIPS (3 << 4)
+
+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 gd5f1gq4u_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ if (section)
+ return -ERANGE;
+
+ region->offset = 64;
+ region->length = 64;
+
+ return 0;
+}
+
+static int gd5f1gq4u_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 gd5f1gq4u_ooblayout = {
+ .ecc = gd5f1gq4u_ooblayout_ecc,
+ .free = gd5f1gq4u_ooblayout_free,
+};
+
+static int gd5f1gq4u_ecc_get_status(struct spinand_device *spinand,
+ u8 status)
+{
+ if (status)
+ debug("%s (%d): status=%02x\n", __func__, __LINE__, status);
+
+ switch (status & GIGADEVICE_STATUS_ECC_MASK) {
+ case STATUS_ECC_NO_BITFLIPS:
+ return 0;
+
+ case GIGADEVICE_STATUS_ECC_1TO7_BITFLIPS:
+ return 7;
+
+ case GIGADEVICE_STATUS_ECC_8_BITFLIPS:
+ return 8;
+
+ case STATUS_ECC_UNCOR_ERROR:
+ return -EBADMSG;
+
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct spinand_info gigadevice_spinand_table[] = {
+ SPINAND_INFO("GD5F1GQ4UC", 0xd1,
+ NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
+ NAND_ECCREQ(8, 2048),
+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ 0,
+ SPINAND_ECCINFO(&gd5f1gq4u_ooblayout,
+ gd5f1gq4u_ecc_get_status)),
+};
+
+static int gigadevice_spinand_detect(struct spinand_device *spinand)
+{
+ u8 *id = spinand->id.data;
+ int ret;
+
+ /*
+ * Gigadevice SPI NAND read ID need a dummy byte,
+ * so the first byte in raw_id is dummy.
+ */
+ if (id[1] != SPINAND_MFR_GIGADEVICE)
+ return 0;
+
+ ret = spinand_match_and_init(spinand, gigadevice_spinand_table,
+ ARRAY_SIZE(gigadevice_spinand_table),
+ id[2]);
+ if (ret)
+ return ret;
+
+ return 1;
+}
+
+static const struct spinand_manufacturer_ops gigadevice_spinand_manuf_ops = {
+ .detect = gigadevice_spinand_detect,
+};
+
+const struct spinand_manufacturer gigadevice_spinand_manufacturer = {
+ .id = SPINAND_MFR_GIGADEVICE,
+ .name = "GigaDevice",
+ .ops = &gigadevice_spinand_manuf_ops,
+};
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 8c9c756..be01e1e 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -201,6 +201,7 @@
};
/* SPI NAND manufacturers */
+extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
extern const struct spinand_manufacturer macronix_spinand_manufacturer;
extern const struct spinand_manufacturer micron_spinand_manufacturer;
extern const struct spinand_manufacturer winbond_spinand_manufacturer;