arm: rockchip: add support for the radxa rock3 board

Add basic support for the Radxa ROCK3 Model A board (featuring
the Rockchip RK3568 SoC).

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.barebox.org/20220531162624.245664-4-michael.riesch@wolfvision.net
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

9 files changed, 159 insertions, 0 deletions

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index d303999614..3ccde26f1b 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -192,3 +192,4 @@ obj-$(CONFIG_MACH_SKOV_ARM9CPU)			+= skov-arm9cpu/
 obj-$(CONFIG_MACH_RK3568_EVB)			+= rockchip-rk3568-evb/
 obj-$(CONFIG_MACH_RK3568_BPI_R2PRO)			+= rockchip-rk3568-bpi-r2pro/
 obj-$(CONFIG_MACH_PINE64_QUARTZ64)		+= pine64-quartz64/
+obj-$(CONFIG_MACH_RADXA_ROCK3)			+= radxa-rock3/
diff --git a/arch/arm/boards/radxa-rock3/.gitignore b/arch/arm/boards/radxa-rock3/.gitignore
new file mode 100644
index 0000000000..f458f794b5
--- /dev/null
+++ b/arch/arm/boards/radxa-rock3/.gitignore
@@ -0,0 +1 @@
+sdram-init.bin
diff --git a/arch/arm/boards/radxa-rock3/Makefile b/arch/arm/boards/radxa-rock3/Makefile
new file mode 100644
index 0000000000..b37b6c870b
--- /dev/null
+++ b/arch/arm/boards/radxa-rock3/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y += board.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/radxa-rock3/board.c b/arch/arm/boards/radxa-rock3/board.c
new file mode 100644
index 0000000000..05a526b06e
--- /dev/null
+++ b/arch/arm/boards/radxa-rock3/board.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <bootsource.h>
+#include <common.h>
+#include <init.h>
+
+struct rock3_model {
+	const char *name;
+	const char *shortname;
+};
+
+static int rock3_probe(struct device_d *dev)
+{
+	enum bootsource bootsource = bootsource_get();
+	int instance = bootsource_get_instance();
+	const struct rock3_model *model;
+
+	model = device_get_match_data(dev);
+
+	barebox_set_model(model->name);
+	barebox_set_hostname(model->shortname);
+
+	if (bootsource == BOOTSOURCE_MMC && instance == 1)
+		of_device_enable_path("/chosen/environment-sd");
+	else
+		of_device_enable_path("/chosen/environment-emmc");
+
+	return 0;
+}
+
+static const struct rock3_model rock3a = {
+	.name = "Radxa ROCK3 Model A",
+	.shortname = "rock3a",
+};
+
+static const struct of_device_id rock3_of_match[] = {
+	{
+		.compatible = "radxa,rock3a",
+		.data = &rock3a,
+	},
+	{ /* sentinel */ },
+};
+
+static struct driver_d rock3_board_driver = {
+	.name = "board-rock3",
+	.probe = rock3_probe,
+	.of_compatible = rock3_of_match,
+};
+coredevice_platform_driver(rock3_board_driver);
diff --git a/arch/arm/boards/radxa-rock3/lowlevel.c b/arch/arm/boards/radxa-rock3/lowlevel.c
new file mode 100644
index 0000000000..00a68889cd
--- /dev/null
+++ b/arch/arm/boards/radxa-rock3/lowlevel.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/hardware.h>
+#include <mach/atf.h>
+#include <debug_ll.h>
+#include <mach/rockchip.h>
+
+extern char __dtb_rk3568_rock_3a_start[];
+
+static noinline void rk3568_start(void *fdt)
+{
+	/*
+	 * Image execution starts at 0x0, but this is used for ATF and
+	 * OP-TEE later, so move away from here.
+	 */
+	if (current_el() == 3)
+		relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);
+	else
+		relocate_to_current_adr();
+
+	setup_c();
+
+	/*
+	 * Enable vccio4 1.8V and vccio6 1.8V
+	 * Needed for GMAC to work.
+	 */
+	writel(RK_SETBITS(0x50), 0xfdc20140);
+
+	if (current_el() == 3) {
+		rk3568_lowlevel_init();
+		rk3568_atf_load_bl31(fdt);
+		/* not reached */
+	}
+
+	barebox_arm_entry(RK3568_DRAM_BOTTOM, 0x80000000 - RK3568_DRAM_BOTTOM, fdt);
+}
+
+ENTRY_FUNCTION(start_rock3a, r0, r1, r2)
+{
+	rk3568_start(__dtb_rk3568_rock_3a_start);
+}
diff --git a/arch/arm/configs/rockchip_v8_defconfig b/arch/arm/configs/rockchip_v8_defconfig
index 79d51234cc..1c7116e74a 100644
--- a/arch/arm/configs/rockchip_v8_defconfig
+++ b/arch/arm/configs/rockchip_v8_defconfig
@@ -2,6 +2,7 @@ CONFIG_ARCH_ROCKCHIP=y
 CONFIG_MACH_RK3568_EVB=y
 CONFIG_MACH_RK3568_BPI_R2PRO=y
 CONFIG_MACH_PINE64_QUARTZ64=y
+CONFIG_MACH_RADXA_ROCK3=y
 CONFIG_BOARD_ARM_GENERIC_DT=y
 CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
 CONFIG_ARM_PSCI_CLIENT=y
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 46e5e67672..61fd3be72b 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -104,6 +104,7 @@ lwl-$(CONFIG_MACH_PROTONIC_STM32MP1) += \
 	stm32mp151-prtt1c.dtb.o \
 	stm32mp151-prtt1s.dtb.o
 lwl-$(CONFIG_MACH_RADXA_ROCK) += rk3188-radxarock.dtb.o
+lwl-$(CONFIG_MACH_RADXA_ROCK3) += rk3568-rock-3a.dtb.o
 lwl-$(CONFIG_MACH_PHYTEC_SOM_RK3288) += rk3288-phycore-som.dtb.o
 lwl-$(CONFIG_MACH_REALQ7) += imx6q-dmo-edmqmx6.dtb.o
 lwl-$(CONFIG_MACH_RK3568_EVB) += rk3568-evb1-v10.dtb.o
diff --git a/arch/arm/dts/rk3568-rock-3a.dts b/arch/arm/dts/rk3568-rock-3a.dts
new file mode 100644
index 0000000000..44d4fc9686
--- /dev/null
+++ b/arch/arm/dts/rk3568-rock-3a.dts
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+
+#include <arm64/rockchip/rk3568-rock-3a.dts>
+
+/ {
+	chosen: chosen {
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &environment_sd;
+			status = "disabled";
+		};
+
+		environment-emmc {
+			compatible = "barebox,environment";
+			device-path = &environment_emmc;
+			status = "disabled";
+		};
+	};
+
+	memory@a00000 {
+		device_type = "memory";
+		reg = <0x0 0x00a00000 0x0 0x7f600000>;
+	};
+};
+
+&sdhci {
+	no-sd;
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		environment_emmc: partition@408000 {
+			label = "barebox-environment";
+			reg = <0x0 0x408000 0x0 0x8000>;
+		};
+	};
+};
+
+&sdmmc0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		environment_sd: partition@408000 {
+			label = "barebox-environment";
+			reg = <0x0 0x408000 0x0 0x8000>;
+		};
+	};
+};
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index ffd3aa8a4e..4b6dfd2c17 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -80,6 +80,12 @@ config MACH_PINE64_QUARTZ64
 	help
 	  Say Y here if you are using a Pine64 Quartz64
 
+config MACH_RADXA_ROCK3
+       select ARCH_RK3568
+       bool "Radxa ROCK3"
+       help
+	  Say Y here if you are using a Radxa ROCK3
+
 comment "select board features:"
 
 config ARCH_RK3399_OPTEE