arm: boards: add wolfvision pf5 mainboard

Add support for the WolfVision PF5 mainboard, which features the Rockchip
RK3568 SoC and can be extended with different expansion boards.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.barebox.org/20240412-feature-wolfvision-pf5-v2-4-7e277cc8831b@wolfvision.net
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

5 files changed, 129 insertions, 0 deletions

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 05fbcca175..062db96e1c 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -203,3 +203,4 @@ obj-$(CONFIG_MACH_RADXA_ROCK5)			+= radxa-rock5/
 obj-$(CONFIG_MACH_VARISCITE_DT8MCUSTOMBOARD_IMX8MP)	+= variscite-dt8mcustomboard-imx8mp/
 obj-$(CONFIG_MACH_RADXA_CM3)			+= radxa-cm3/
 obj-$(CONFIG_MACH_TQMA93XX)			+= tqma93xx/
+obj-$(CONFIG_MACH_WOLFVISION_PF5)		+= wolfvision-pf5/
diff --git a/arch/arm/boards/wolfvision-pf5/.gitignore b/arch/arm/boards/wolfvision-pf5/.gitignore
new file mode 100644
index 0000000000..f458f794b5
--- /dev/null
+++ b/arch/arm/boards/wolfvision-pf5/.gitignore
@@ -0,0 +1 @@
+sdram-init.bin
diff --git a/arch/arm/boards/wolfvision-pf5/Makefile b/arch/arm/boards/wolfvision-pf5/Makefile
new file mode 100644
index 0000000000..b37b6c870b
--- /dev/null
+++ b/arch/arm/boards/wolfvision-pf5/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/wolfvision-pf5/board.c b/arch/arm/boards/wolfvision-pf5/board.c
new file mode 100644
index 0000000000..797f51bc2e
--- /dev/null
+++ b/arch/arm/boards/wolfvision-pf5/board.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Board code for the WolfVision PF5 mainboard.
+ *
+ * Copyright (C) 2024 WolfVision GmbH.
+ */
+#include <common.h>
+#include <deep-probe.h>
+#include <globalvar.h>
+#include <init.h>
+
+#include <boards/wolfvision/common.h>
+#include <mach/rockchip/bbu.h>
+
+#define PF5_IO_EXPANDER_FILENAME "rk3568-wolfvision-pf5-io-expander.dtbo"
+#define PF5_IO_EXPANDER_DATA __dtbo_rk3568_wolfvision_pf5_io_expander_start
+
+enum {
+	PF5_HWID_CHANNEL_MAINBOARD = 1,
+	PF5_HWID_CHANNEL_MODULE = 2,
+};
+
+extern char PF5_IO_EXPANDER_DATA[];
+
+static const struct wv_rk3568_extension pf5_extensions[] = {
+	{
+		.adc_chan = PF5_HWID_CHANNEL_MAINBOARD,
+		.name = "mainboard",
+		.overlays = {
+			[0] = { .name = "PF5 DC V1.0 A", },
+			[4] = { .name = "PF5 DC V1.1 A", },
+		},
+	},
+	{
+		.adc_chan = PF5_HWID_CHANNEL_MODULE,
+		.name = "module",
+		.overlays = {
+			[0] = { .name = "PF5 IO Expander V1.0 A",
+				.filename = PF5_IO_EXPANDER_FILENAME,
+				.data = PF5_IO_EXPANDER_DATA,
+			},
+			[16] = { .name = "no", },
+		},
+	},
+};
+
+static int pf5_probe(struct device *dev)
+{
+	char *pf5_overlays = NULL;
+	int ret;
+
+	barebox_set_model("WolfVision PF5");
+	barebox_set_hostname("PF5");
+
+	ret = wolfvision_register_ethaddr();
+	if (ret)
+		pr_warning("failed to register MAC addresses\n");
+
+	rk3568_bbu_mmc_register("emmc", BBU_HANDLER_FLAG_DEFAULT, "/dev/mmc0");
+
+	ret = wolfvision_rk3568_detect_hw(
+		pf5_extensions, ARRAY_SIZE(pf5_extensions), &pf5_overlays);
+	if (ret)
+		pr_warning("failed to detect HW\n");
+
+	if (pf5_overlays)
+		globalvar_set("of.overlay.filepattern", pf5_overlays);
+
+	free(pf5_overlays);
+
+	return 0;
+}
+
+static const struct of_device_id pf5_of_match[] = {
+	{
+		.compatible = "wolfvision,rk3568-pf5",
+	},
+	{ /* sentinel */ },
+};
+
+static struct driver_d pf5_board_driver = {
+	.name = "board-wolfvision-pf5",
+	.probe = pf5_probe,
+	.of_compatible = pf5_of_match,
+};
+coredevice_platform_driver(pf5_board_driver);
+
+BAREBOX_DEEP_PROBE_ENABLE(pf5_of_match);
diff --git a/arch/arm/boards/wolfvision-pf5/lowlevel.c b/arch/arm/boards/wolfvision-pf5/lowlevel.c
new file mode 100644
index 0000000000..c20ca4ae13
--- /dev/null
+++ b/arch/arm/boards/wolfvision-pf5/lowlevel.c
@@ -0,0 +1,36 @@
+// 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/rockchip/hardware.h>
+#include <mach/rockchip/atf.h>
+#include <debug_ll.h>
+#include <mach/rockchip/rockchip.h>
+
+extern char __dtb_rk3568_wolfvision_pf5_start[];
+
+ENTRY_FUNCTION(start_rk3568_wolfvision_pf5, r0, r1, r2)
+{
+	/*
+	 * Enable vccio4 1.8V and vccio5 1.8V
+	 * FIXME: This is done by the io-domain driver as well, but there
+	 * currently is no mechanism to make sure the driver gets probed
+	 * before its consumers. Remove this setup once this issue is
+	 * resolved.
+	 */
+	writel(RK_SETBITS(0x30), 0xfdc20140);
+
+	/*
+	 * 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_barebox_entry(__dtb_rk3568_wolfvision_pf5_start);
+}