ARM: Rockchip: Add rk3568 BananaPi R2 Pro board support

This adds support for the BananaPi R2 Pro board.
It is basicly a copy of rk3568 evb board but with slightly modified DTS.
Added GPIO-Leds to dts and modified the hw-detection a bit.

Tested features so far are:

 - 1st stage booting
 - Network
 - SD card and Emmc
 - usb (1.1 and 3 work, usb2 not working)
 - power LED (green)

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.barebox.org/20220211091354.11573-1-linux@fw-web.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/boards/rockchip-rk3568-bpi-r2pro/lowlevel.c b/arch/arm/boards/rockchip-rk3568-bpi-r2pro/lowlevel.c
new file mode 100644
index 0000000000..9f039c6048
--- /dev/null
+++ b/arch/arm/boards/rockchip-rk3568-bpi-r2pro/lowlevel.c
@@ -0,0 +1,49 @@
+// 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_bpi_r2_pro_start[];
+
+static noinline void rk3568_start(void)
+{
+	void *fdt;
+
+	/*
+	 * Enable vccio4 1.8V and vccio6 1.8V
+	 * Needed for GMAC to work.
+	 */
+	writel(RK_SETBITS(0x50), 0xfdc20140);
+
+	fdt = __dtb_rk3568_bpi_r2_pro_start;
+
+	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_rk3568_bpi_r2pro, r0, r1, r2)
+{
+	/*
+	 * 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();
+
+	rk3568_start();
+}