arm64: dts: renesas: r8a779g3: Add Retronix R-Car V4H Sparrow Hawk board support

Add Retronix R-Car V4H Sparrow Hawk board based on Renesas R-Car V4H ES3.0
(R8A779G3) SoC. This is a single-board computer with single gigabit ethernet,
DSI-to-eDP bridge, DSI and two CSI2 interfaces, audio codec, two CANFD ports,
micro SD card slot, USB PD supply, USB 3.0 ports, M.2 Key-M slot for NVMe SSD,
debug UART and JTAG.

DT is imported from Linux next commit:
a719915e76f2 ("arm64: dts: renesas: r8a779g3: Add Retronix R-Car V4H Sparrow Hawk board support")

Signed-off-by: Marek Vasut <[email protected]>

4 files changed, 174 insertions, 0 deletions

diff --git a/board/renesas/sparrowhawk/Kconfig b/board/renesas/sparrowhawk/Kconfig
new file mode 100644
index 00000000000..6b7aba348df
--- /dev/null
+++ b/board/renesas/sparrowhawk/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_SPARROWHAWK
+
+config SYS_SOC
+	default "renesas"
+
+config SYS_BOARD
+	default "sparrowhawk"
+
+config SYS_VENDOR
+	default "renesas"
+
+config SYS_CONFIG_NAME
+	default "sparrowhawk"
+
+endif
diff --git a/board/renesas/sparrowhawk/MAINTAINERS b/board/renesas/sparrowhawk/MAINTAINERS
new file mode 100644
index 00000000000..9f759aefab8
--- /dev/null
+++ b/board/renesas/sparrowhawk/MAINTAINERS
@@ -0,0 +1,7 @@
+SPARROWHAWK BOARD
+M:	Marek Vasut <[email protected]>
+S:	Maintained
+F:	arch/arm/dts/r8a779g3*
+F:	board/renesas/sparrowhawk/
+F:	configs/r8a779g3_sparrowhawk_defconfig
+F:	include/configs/sparrowhawk.h
diff --git a/board/renesas/sparrowhawk/Makefile b/board/renesas/sparrowhawk/Makefile
new file mode 100644
index 00000000000..90da9e02537
--- /dev/null
+++ b/board/renesas/sparrowhawk/Makefile
@@ -0,0 +1,9 @@
+#
+# board/renesas/sparrowhawk/Makefile
+#
+# Copyright (C) 2025 Marek Vasut <[email protected]>
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y	+= sparrowhawk.o
diff --git a/board/renesas/sparrowhawk/sparrowhawk.c b/board/renesas/sparrowhawk/sparrowhawk.c
new file mode 100644
index 00000000000..8e72b5424d1
--- /dev/null
+++ b/board/renesas/sparrowhawk/sparrowhawk.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2025 Marek Vasut <[email protected]>
+ */
+
+#include <asm/io.h>
+#include <compiler.h>
+#include <dbsc5.h>
+#include <spl.h>
+
+#if defined(CONFIG_XPL_BUILD)
+
+static const struct renesas_dbsc5_board_config
+renesas_v4h_sparrowhawk_8g_6400_dbsc5_board_config = {
+	/* RENESAS V4H Sparrow Hawk (64Gbit 1rank) */
+	.bdcfg_phyvalid	= 0xF,
+	.bdcfg_vref_r	= 0x0,
+	.bdcfg_vref_w	= 0x0,
+	.bdcfg_vref_ca	= 0x0,
+	.bdcfg_rfm_chk	= true,
+	.ch = {
+		[0] = {
+			.bdcfg_ddr_density =	{ 0x06, 0xFF },
+			.bdcfg_ca_swap =	0x04506132,
+			.bdcfg_dqs_swap =	0x01,
+			.bdcfg_dq_swap =	{ 0x26157084, 0x12306854 },
+			.bdcfg_dm_swap =	{ 0x03, 0x07 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[1] = {
+			.bdcfg_ddr_density =	{ 0x06, 0xFF },
+			.bdcfg_ca_swap =	0x02431065,
+			.bdcfg_dqs_swap =	0x10,
+			.bdcfg_dq_swap =	{ 0x56782314, 0x70423856 },
+			.bdcfg_dm_swap =	{ 0x00, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[2] = {
+			.bdcfg_ddr_density =	{ 0x06, 0xFF },
+			.bdcfg_ca_swap =	0x02150643,
+			.bdcfg_dqs_swap =	0x10,
+			.bdcfg_dq_swap =	{ 0x58264031, 0x40587236 },
+			.bdcfg_dm_swap =	{ 0x07, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[3] = {
+			.bdcfg_ddr_density =	{ 0x06, 0xFF },
+			.bdcfg_ca_swap =	0x01546230,
+			.bdcfg_dqs_swap =	0x01,
+			.bdcfg_dq_swap =	{ 0x45761328, 0x68023745 },
+			.bdcfg_dm_swap =	{ 0x00, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		}
+	}
+};
+
+static const struct renesas_dbsc5_board_config
+renesas_v4h_sparrowhawk_16g_5500_dbsc5_board_config = {
+	/* RENESAS V4H Sparrow Hawk (64Gbit 2rank) */
+	.bdcfg_phyvalid	= 0xF,
+	.bdcfg_vref_r	= 0x0,
+	.bdcfg_vref_w	= 0x0,
+	.bdcfg_vref_ca	= 0x0,
+	.bdcfg_rfm_chk	= true,
+	.ch = {
+		[0] = {
+			.bdcfg_ddr_density =	{ 0x06, 0x06 },
+			.bdcfg_ca_swap =	0x04506132,
+			.bdcfg_dqs_swap =	0x01,
+			.bdcfg_dq_swap =	{ 0x26157084, 0x12306854 },
+			.bdcfg_dm_swap =	{ 0x03, 0x07 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[1] = {
+			.bdcfg_ddr_density =	{ 0x06, 0x06 },
+			.bdcfg_ca_swap =	0x02431065,
+			.bdcfg_dqs_swap =	0x10,
+			.bdcfg_dq_swap =	{ 0x56782314, 0x70423856 },
+			.bdcfg_dm_swap =	{ 0x00, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[2] = {
+			.bdcfg_ddr_density =	{ 0x06, 0x06 },
+			.bdcfg_ca_swap =	0x02150643,
+			.bdcfg_dqs_swap =	0x10,
+			.bdcfg_dq_swap =	{ 0x58264031, 0x40587236 },
+			.bdcfg_dm_swap =	{ 0x07, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		},
+		[3] = {
+			.bdcfg_ddr_density =	{ 0x06, 0x06 },
+			.bdcfg_ca_swap =	0x01546230,
+			.bdcfg_dqs_swap =	0x01,
+			.bdcfg_dq_swap =	{ 0x45761328, 0x68023745 },
+			.bdcfg_dm_swap =	{ 0x00, 0x01 },
+			.bdcfg_cs_swap =	0x10
+		}
+	}
+};
+
+const struct renesas_dbsc5_board_config *
+dbsc5_get_board_data(struct udevice *dev, const u32 modemr0)
+{
+	/*
+	 * MD[19] is used to discern between 5500 Mbps and 6400 Mbps operation.
+	 *
+	 * Boards with 1 rank of DRAM can operate at 6400 Mbps, those are the
+	 * Sparrow Hawk boards with 8 GiB of DRAM. Boards with 2 ranks of DRAM
+	 * are limited to 5500 Mbps operation, those are the boards with 16 GiB
+	 * of DRAM.
+	 *
+	 * Use MD[19] setting to discern 8 GiB and 16 GiB DRAM Sparrow Hawk
+	 * board variants from each other automatically.
+	 */
+	if (modemr0 & BIT(19))
+		return &renesas_v4h_sparrowhawk_16g_5500_dbsc5_board_config;
+	else
+		return &renesas_v4h_sparrowhawk_8g_6400_dbsc5_board_config;
+}
+
+#endif
+
+#define RST_MODEMR0			0xe6160000
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void renesas_dram_init_banksize(void)
+{
+	const u32 modemr0 = readl(RST_MODEMR0);
+	int bank;
+
+	/* 8 GiB device, do nothing. */
+	if (!(modemr0 & BIT(19)))
+		return;
+
+	/* 16 GiB device, adjust memory map. */
+	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+		if (gd->bd->bi_dram[bank].start == 0x480000000ULL)
+			gd->bd->bi_dram[bank].size = 0x180000000ULL;
+		else if (gd->bd->bi_dram[bank].start == 0x600000000ULL)
+			gd->bd->bi_dram[bank].size = 0x200000000ULL;
+	}
+}