arm: rmobile: Add HopeRun HiHope RZ/G2M board support

The HiHope RZ/G2M board from HopeRun consists of main board
(HopeRun HiHope RZ/G2M main board) and sub board(HopeRun
HiHope RZ/G2M sub board). The HiHope RZ/G2M sub board sits
below the HiHope RZ/G2M main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2M board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

4 files changed, 135 insertions, 0 deletions

diff --git a/board/hoperun/hihope-rzg2/Kconfig b/board/hoperun/hihope-rzg2/Kconfig
new file mode 100644
index 0000000..ee422ba
--- /dev/null
+++ b/board/hoperun/hihope-rzg2/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_HIHOPE_RZG2
+
+config SYS_SOC
+	default "rmobile"
+
+config SYS_BOARD
+	default "hihope-rzg2"
+
+config SYS_VENDOR
+	default "hoperun"
+
+config SYS_CONFIG_NAME
+	default "hihope-rzg2"
+
+endif
diff --git a/board/hoperun/hihope-rzg2/MAINTAINERS b/board/hoperun/hihope-rzg2/MAINTAINERS
new file mode 100644
index 0000000..e3702fd
--- /dev/null
+++ b/board/hoperun/hihope-rzg2/MAINTAINERS
@@ -0,0 +1,6 @@
+HIHOPE_RZG2 BOARD
+M:	Biju Das <biju.das.jz@bp.renesas.com>
+S:	Maintained
+F:	board/hoperun/hihope-rzg2/
+F:	include/configs/hihope-rzg2.h
+F:	configs/hihope_rzg2_defconfig
diff --git a/board/hoperun/hihope-rzg2/Makefile b/board/hoperun/hihope-rzg2/Makefile
new file mode 100644
index 0000000..e989e7a
--- /dev/null
+++ b/board/hoperun/hihope-rzg2/Makefile
@@ -0,0 +1,9 @@
+#
+# board/hoperun/hihope-rzg2/Makefile
+#
+# Copyright (C) 2021 Renesas Electronics Corporation
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y	:= hihope-rzg2.o ../../renesas/rcar-common/common.o
diff --git a/board/hoperun/hihope-rzg2/hihope-rzg2.c b/board/hoperun/hihope-rzg2/hihope-rzg2.c
new file mode 100644
index 0000000..a60529f
--- /dev/null
+++ b/board/hoperun/hihope-rzg2/hihope-rzg2.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * board/hoperun/hihope-rzg2/hihope-rzg2.c
+ *     This file is HiHope RZ/G2M board support.
+ *
+ * Copyright (C) 2021 Renesas Electronics Corporation
+ */
+
+#include <common.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/arch/rmobile.h>
+#include <asm/arch/rcar-mstp.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/libfdt.h>
+
+#define RST_BASE	0xE6160000
+#define RST_CA57RESCNT	(RST_BASE + 0x40)
+#define RST_CA53RESCNT	(RST_BASE + 0x44)
+#define RST_CA57_CODE	0xA5A5000F
+#define RST_CA53_CODE	0x5A5A000F
+
+DECLARE_GLOBAL_DATA_PTR;
+#define HSUSB_MSTP704		BIT(4)	/* HSUSB */
+
+/* HSUSB block registers */
+#define HSUSB_REG_LPSTS			0xE6590102
+#define HSUSB_REG_LPSTS_SUSPM_NORMAL	BIT(14)
+#define HSUSB_REG_UGCTRL2		0xE6590184
+#define HSUSB_REG_UGCTRL2_USB0SEL_EHCI	0x10
+#define HSUSB_REG_UGCTRL2_RESERVED_3	0x1 /* bit[3:0] should be B'0001 */
+
+#define PRR_REGISTER (0xFFF00044)
+
+int board_init(void)
+{
+	u32 i;
+
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_TEXT_BASE + 0x50000;
+
+	/* Configure the HSUSB block */
+	mstp_clrbits_le32(SMSTPCR7, SMSTPCR7, HSUSB_MSTP704);
+	/*
+	 * We need to add a barrier instruction after HSUSB module stop release.
+	 * This barrier instruction can be either reading back the same MSTP
+	 * register or any other register in the same IP block. So like linux
+	 * adding check for MSTPSR register, which indicates the clock has been
+	 * started.
+	 */
+	for (i = 1000; i > 0; --i) {
+		if (!(readl(MSTPSR7) & HSUSB_MSTP704))
+			break;
+		cpu_relax();
+	}
+
+	/* Select EHCI/OHCI host module for USB2.0 ch0 */
+	writel(HSUSB_REG_UGCTRL2_USB0SEL_EHCI | HSUSB_REG_UGCTRL2_RESERVED_3,
+	       HSUSB_REG_UGCTRL2);
+	/* low power status */
+	setbits_le16(HSUSB_REG_LPSTS, HSUSB_REG_LPSTS_SUSPM_NORMAL);
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	unsigned long midr, cputype;
+
+	asm volatile("mrs %0, midr_el1" : "=r" (midr));
+	cputype = (midr >> 4) & 0xfff;
+
+	if (cputype == 0xd03)
+		writel(RST_CA53_CODE, RST_CA53RESCNT);
+	else
+		writel(RST_CA57_CODE, RST_CA57RESCNT);
+}
+
+#if defined(CONFIG_MULTI_DTB_FIT)
+/* If the firmware passed a device tree, use it for board identification. */
+extern u64 rcar_atf_boot_args[];
+
+static bool is_hoperun_hihope_rzg2_board(const char *board_name)
+{
+	void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
+	bool ret = false;
+
+	if ((fdt_magic(atf_fdt_blob) == FDT_MAGIC) &&
+	    (fdt_node_check_compatible(atf_fdt_blob, 0, board_name) == 0))
+		ret = true;
+
+	return ret;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	if (is_hoperun_hihope_rzg2_board("hoperun,hihope-rzg2m") &&
+	    !strcmp(name, "r8a774a1-hihope-rzg2m-u-boot"))
+		return 0;
+
+	return -1;
+}
+#endif