1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/dosilicon.c b/drivers/mtd/nand/spi/dosilicon.c
new file mode 100644
index 000000000000..f99899866ceb
--- /dev/null
+++ b/drivers/mtd/nand/spi/dosilicon.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author: Ahmed Naseef <naseefkm@gmail.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_DOSILICON        0xE5
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_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 ds35xx_ooblayout_ecc(struct mtd_info *mtd, int section,
+				struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	region->offset = 8 + (section * 16);
+	region->length = 8;
+
+	return 0;
+}
+
+static int ds35xx_ooblayout_free(struct mtd_info *mtd, int section,
+				 struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	if (section == 0) {
+		/* reserve 2 bytes for the BBM */
+		region->offset = 2;
+		region->length = 6;
+	} else {
+		region->offset = section * 16;
+		region->length = 8;
+	}
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops ds35xx_ooblayout = {
+	.ecc = ds35xx_ooblayout_ecc,
+	.free = ds35xx_ooblayout_free,
+};
+
+static const struct spinand_info dosilicon_spinand_table[] = {
+	SPINAND_INFO("DS35Q1GA",
+		SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),
+		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(&ds35xx_ooblayout, NULL)),
+	SPINAND_INFO("DS35M1GA",
+		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(&ds35xx_ooblayout, NULL)),
+};
+
+static const struct spinand_manufacturer_ops dosilicon_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer dosilicon_spinand_manufacturer = {
+	.id = SPINAND_MFR_DOSILICON,
+	.name = "Dosilicon",
+	.chips = dosilicon_spinand_table,
+	.nchips = ARRAY_SIZE(dosilicon_spinand_table),
+	.ops = &dosilicon_spinand_manuf_ops,
+};