target/linux/mediatek/patches-5.4/999-2341-mtd-spinand-Add-support-etron.patch

Index: a/drivers/mtd/nand/spi/Makefile
===================================================================
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
-spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o
+spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o etron.o
 obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
Index: a/drivers/mtd/nand/spi/core.c
===================================================================
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -754,6 +754,7 @@ static const struct nand_ops spinand_ops
 };
 
 static const struct spinand_manufacturer *spinand_manufacturers[] = {
+	&etron_spinand_manufacturer,
 	&gigadevice_spinand_manufacturer,
 	&macronix_spinand_manufacturer,
 	&micron_spinand_manufacturer,
Index: a/drivers/mtd/nand/spi/etron.c
===================================================================
--- /dev/null
+++ b/drivers/mtd/nand/spi/etron.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Etron Technology, Inc.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_ETRON		0xD5
+
+#define STATUS_ECC_LIMIT_BITFLIPS (3 << 4)
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, 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 etron_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	region->offset = (14 * section) + 72;
+	region->length = 14;
+
+	return 0;
+}
+
+static int etron_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	if (section) {
+		region->offset = 18 * section;
+		region->length = 18;
+	} else {
+		/* section 0 has one byte reserved for bad block mark */
+		region->offset = 2;
+		region->length = 16;
+	}
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops etron_ooblayout = {
+	.ecc = etron_ooblayout_ecc,
+	.free = etron_ooblayout_free,
+};
+
+static int etron_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_UNCOR_ERROR:
+		return -EBADMSG;
+
+	case STATUS_ECC_HAS_BITFLIPS:
+		return nand->eccreq.strength >> 1;
+
+	case STATUS_ECC_LIMIT_BITFLIPS:
+		return nand->eccreq.strength;
+
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct spinand_info etron_spinand_table[] = {
+	/* EM73C 1Gb 3.3V */
+	SPINAND_INFO("EM73C044VCF",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x25),
+		     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(&etron_ooblayout, etron_ecc_get_status)),
+	/* EM7xD 2Gb */
+	SPINAND_INFO("EM73D044VCR",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x41),
+		     NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 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(&etron_ooblayout, etron_ecc_get_status)),
+	SPINAND_INFO("EM73D044VCO",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x3A),
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+	SPINAND_INFO("EM78D044VCM",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x8E),
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+	/* EM7xE 4Gb */
+	SPINAND_INFO("EM73E044VCE",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x3B),
+		     NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+	SPINAND_INFO("EM78E044VCD",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x8F),
+		     NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+	/* EM7xF044VCA 8Gb */
+	SPINAND_INFO("EM73F044VCA",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x15),
+		     NAND_MEMORG(1, 4096, 256, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+	SPINAND_INFO("EM78F044VCA",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x8D),
+		     NAND_MEMORG(1, 4096, 256, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&etron_ooblayout, etron_ecc_get_status)),
+};
+
+static const struct spinand_manufacturer_ops etron_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer etron_spinand_manufacturer = {
+	.id = SPINAND_MFR_ETRON,
+	.name = "Etron",
+	.chips = etron_spinand_table,
+	.nchips = ARRAY_SIZE(etron_spinand_table),
+	.ops = &etron_spinand_manuf_ops,
+};
+
Index: a/include/linux/mtd/spinand.h
===================================================================
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -238,6 +238,7 @@ struct spinand_manufacturer {
 };
 
 /* SPI NAND manufacturers */
+extern const struct spinand_manufacturer etron_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;