From 1e5200d59e21c8a8fa63badf415becb2301e78a4 Mon Sep 17 00:00:00 2001
From: Jon Lin <jon.lin@rock-chips.com>
Date: Thu, 27 Apr 2023 22:00:04 +0800
Subject: [PATCH] mtd: spinand: gsto: Add code

GSS01GSAK1, GSS02GSAK1

Change-Id: I7ee9048d934694803d6d081cb7d0cdc56f114e79
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
---
 drivers/mtd/nand/spi/Makefile |  2 +-
 drivers/mtd/nand/spi/core.c   |  1 +
 drivers/mtd/nand/spi/gsto.c   | 90 +++++++++++++++++++++++++++++++++++
 include/linux/mtd/spinand.h   |  1 +
 4 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mtd/nand/spi/gsto.c

--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fmsh.o foresee.o gigadevice.o
-spinand-objs += dosilicon.o
+spinand-objs += dosilicon.o gsto.o
 spinand-objs += macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
 obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -949,6 +949,7 @@ static const struct spinand_manufacturer
 	&fmsh_spinand_manufacturer,
 	&foresee_spinand_manufacturer,
 	&gigadevice_spinand_manufacturer,
+	&gsto_spinand_manufacturer,
 	&macronix_spinand_manufacturer,
 	&micron_spinand_manufacturer,
 	&paragon_spinand_manufacturer,
--- /dev/null
+++ b/drivers/mtd/nand/spi/gsto.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Rockchip Electronics Co., Ltd.
+ *
+ * Authors:
+ *	Dingqiang Lin <jon.lin@rock-chips.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_GSTO		0x52
+
+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 gss0xgsak1_ooblayout_ecc(struct mtd_info *mtd, int section,
+				 struct mtd_oob_region *region)
+{
+	if (section)
+		return -ERANGE;
+
+	region->offset = 32;
+	region->length = 32;
+
+	return 0;
+}
+
+static int gss0xgsak1_ooblayout_free(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section)
+		return -ERANGE;
+
+	region->offset = 2;
+	region->length = 30;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops gss0xgsak1_ooblayout = {
+	.ecc = gss0xgsak1_ooblayout_ecc,
+	.free = gss0xgsak1_ooblayout_free,
+};
+
+static int gss0xgsax1_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 gss0xgsax1_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 gss0xgsax1_ooblayout = {
+	.ecc = gss0xgsax1_ooblayout_ecc,
+	.free = gss0xgsax1_ooblayout_free,
+};
+
+static const struct spinand_info gsto_spinand_table[] = {
+	SPINAND_INFO("GSS01GSAK1",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xBA, 0x13),
+		     NAND_MEMORG(1, 2048, 64, 64, 1024, 10, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&gss0xgsak1_ooblayout, NULL)),
+	SPINAND_INFO("GSS02GSAK1",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xBA, 0x23),
+		     NAND_MEMORG(1, 2048, 64, 64, 2048, 20, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&gss0xgsax1_ooblayout, NULL)),
+	SPINAND_INFO("GSS02GSAX1",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xCA, 0x23),
+		     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),
+		     0,
+		     SPINAND_ECCINFO(&gss0xgsax1_ooblayout, NULL)),
+	SPINAND_INFO("GSS01GSAX1",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xCA, 0x13),
+		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&gss0xgsax1_ooblayout, NULL)),
+};
+
+static const struct spinand_manufacturer_ops gsto_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer gsto_spinand_manufacturer = {
+	.id = SPINAND_MFR_GSTO,
+	.name = "GSTO",
+	.chips = gsto_spinand_table,
+	.nchips = ARRAY_SIZE(gsto_spinand_table),
+	.ops = &gsto_spinand_manuf_ops,
+};
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -268,6 +268,7 @@ extern const struct 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 gsto_spinand_manufacturer;
 extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 extern const struct spinand_manufacturer micron_spinand_manufacturer;
 extern const struct spinand_manufacturer paragon_spinand_manufacturer;
