rockchip: add support for PX30 Ringneck SoM on Haikou Devkit

The PX30-µQ7 (Ringneck) is a system-on-module featuring the Rockchip
PX30 in a micro Qseven-compatible form-factor.

PX30-µQ7 features:
        * CPU: quad-core Cortex-A35
        * DRAM: 2GB dual-channel
        * eMMC: onboard eMMC
        * SD/MMC
        * TI DP83825I 10/100Mbps PHY
        * USB:
                * USB2.0 dual role port
                * 3x USB2.0 host via onboard USB2.0 hub
        * Display: MIPI-DSI
        * Camera: MIPI-CSI
        * onboard 2.4GHz WiFi + Bluetooth module
        * Companion Controller: on-board additional microcontroller
	  (STM32 Cortex-M0 or ATtiny):
                * RTC
                * fan controller
                * CAN (only STM32)

The non-U-Boot DTS files are imported from Linux v6.2-rc2.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>

5 files changed, 278 insertions, 0 deletions

diff --git a/board/theobroma-systems/ringneck_px30/Kconfig b/board/theobroma-systems/ringneck_px30/Kconfig
new file mode 100644
index 0000000000..24d94807db
--- /dev/null
+++ b/board/theobroma-systems/ringneck_px30/Kconfig
@@ -0,0 +1,18 @@
+if TARGET_RINGNECK_PX30
+
+config SYS_BOARD
+	default "ringneck_px30"
+
+config SYS_VENDOR
+	default "theobroma-systems"
+
+config SYS_CONFIG_NAME
+	default "ringneck_px30"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+
+config ENV_SIZE
+	default 0x3000
+
+endif
diff --git a/board/theobroma-systems/ringneck_px30/MAINTAINERS b/board/theobroma-systems/ringneck_px30/MAINTAINERS
new file mode 100644
index 0000000000..d764e26066
--- /dev/null
+++ b/board/theobroma-systems/ringneck_px30/MAINTAINERS
@@ -0,0 +1,9 @@
+RINGNECK-PX30
+M:	Quentin Schulz <quentin.schulz@theobroma-systems.com>
+M:	Klaus Goger <klaus.goger@theobroma-systems.com>
+S:	Maintained
+F:	board/theobroma-systems/ringneck_px30
+F:	include/configs/ringneck_px30.h
+F:	arch/arm/dts/px30-ringneck*
+F:	configs/ringneck-px30_defconfig
+W:	https://www.theobroma-systems.com/px30-uq7#tech-spec
diff --git a/board/theobroma-systems/ringneck_px30/Makefile b/board/theobroma-systems/ringneck_px30/Makefile
new file mode 100644
index 0000000000..31ada1a694
--- /dev/null
+++ b/board/theobroma-systems/ringneck_px30/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2022 Theobroma Systems Design und Consulting GmbH
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-y	+= ringneck-px30.o
diff --git a/board/theobroma-systems/ringneck_px30/README b/board/theobroma-systems/ringneck_px30/README
new file mode 100644
index 0000000000..e756b3a8ff
--- /dev/null
+++ b/board/theobroma-systems/ringneck_px30/README
@@ -0,0 +1,69 @@
+Introduction
+============
+
+The PX30-uQ7 (Ringneck) SoM is a µQseven-compatible (40mmx70mm, MXM-230
+connector) system-on-module from Theobroma Systems[1], featuring the
+Rockchip PX30.
+
+It provides the following feature set:
+  * up to 4GB DDR4
+  * up to 128GB on-module eMMC (with 8-bit 1.8V interface)
+  * SD card (on a baseboard) via edge connector
+  * Fast Ethernet with on-module TI DP83825I PHY
+  * MIPI-DSI/LVDS
+  * MIPI-CSI
+  * USB
+    - 1x USB 2.0 dual-role
+    - 3x USB 2.0 host
+  * on-module companion controller (STM32 Cortex-M0 or ATtiny), implementing:
+    - low-power RTC functionality (ISL1208 emulation)
+    - fan controller (AMC6821 emulation)
+    - USB<->CAN bridge controller (STM32 only)
+  * on-module Espressif ESP32 for Bluetooth + 2.4GHz WiFi
+  * on-module NXP SE05x Secure Element
+
+Here is the step-by-step to boot to U-Boot on px30.
+
+Get the Source and build ATF binary
+===================================
+
+  > git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
+
+Compile the ATF
+===============
+
+  > cd trusted-firmware-a
+  > make CROSS_COMPILE=aarch64-linux-gnu- PLAT=px30 bl31
+  > cp build/px30/release/bl31/bl31.elf ../u-boot/bl31.elf
+
+Compile the U-Boot
+==================
+
+  > cd ../u-boot
+  > make CROSS_COMPILE=aarch64-linux-gnu- ringneck-px30_defconfig all
+
+Flash the image
+===============
+
+Copy u-boot-rockchip.bin to offset 32k for SD/eMMC.
+
+SD-Card
+-------
+
+  > dd if=u-boot-rockchip.bin of=/dev/sdb seek=64
+
+eMMC
+----
+
+rkdeveloptool allows to flash the on-board eMMC via the USB OTG interface with
+help of the Rockchip loader binary.
+
+  > git clone https://github.com/rockchip-linux/rkdeveloptool
+  > cd rkdeveloptool
+  > autoreconf -i && ./configure && make
+  > git clone https://github.com/rockchip-linux/rkbin.git
+  > cd rkbin
+  > ./tools/boot_merger RKBOOT/PX30MINIALL.ini
+  > cd ..
+  > ./rkdeveloptool db rkbin/px30_loader_v1.16.131.bin
+  > ./rkdeveloptool wl 64 ../u-boot-rockchip.bin
diff --git a/board/theobroma-systems/ringneck_px30/ringneck-px30.c b/board/theobroma-systems/ringneck_px30/ringneck-px30.c
new file mode 100644
index 0000000000..47d1a40ef7
--- /dev/null
+++ b/board/theobroma-systems/ringneck_px30/ringneck-px30.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2022 Theobroma Systems Design und Consulting GmbH
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <env.h>
+#include <env_internal.h>
+#include <init.h>
+#include <log.h>
+#include <misc.h>
+#include <spl.h>
+#include <syscon.h>
+#include <u-boot/crc.h>
+#include <usb.h>
+#include <dm/pinctrl.h>
+#include <dm/uclass-internal.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/arch-rockchip/clock.h>
+#include <asm/arch-rockchip/hardware.h>
+#include <asm/arch-rockchip/periph.h>
+#include <asm/arch-rockchip/misc.h>
+#include <power/regulator.h>
+#include <u-boot/sha256.h>
+
+/*
+ * Swap mmc0 and mmc1 in boot_targets if booted from SD-Card.
+ *
+ * If bootsource is uSD-card we can assume that we want to use the
+ * SD-Card instead of the eMMC as first boot_target for distroboot.
+ * We only want to swap the defaults and not any custom environment a
+ * user has set. We exit early if a changed boot_targets environment
+ * is detected.
+ */
+static int setup_boottargets(void)
+{
+	const char *boot_device =
+		ofnode_read_chosen_string("u-boot,spl-boot-device");
+	char *env_default, *env;
+
+	if (!boot_device) {
+		debug("%s: /chosen/u-boot,spl-boot-device not set\n",
+		      __func__);
+		return -1;
+	}
+	debug("%s: booted from %s\n", __func__, boot_device);
+
+	env_default = env_get_default("boot_targets");
+	env = env_get("boot_targets");
+	if (!env) {
+		debug("%s: boot_targets does not exist\n", __func__);
+		return -1;
+	}
+	debug("%s: boot_targets current: %s - default: %s\n",
+	      __func__, env, env_default);
+
+	if (strcmp(env_default, env) != 0) {
+		debug("%s: boot_targets not default, don't change it\n",
+		      __func__);
+		return 0;
+	}
+
+	/*
+	 * Make the default boot medium between SD Card and eMMC, the one that
+	 * was used to load U-Boot proper.
+	 */
+	bool sd_booted = !strcmp(boot_device, "/mmc@ff370000");
+	char *mmc0, *mmc1;
+
+	debug("%s: booted from %s\n", __func__,
+	      sd_booted ? "SD-Card" : "eMMC");
+	mmc0 = strstr(env, "mmc0");
+	mmc1 = strstr(env, "mmc1");
+
+	if (!mmc0 || !mmc1) {
+		debug("%s: only one mmc boot_target found\n", __func__);
+		return -1;
+	}
+
+	/*
+	 * If mmc0 comes first in the boot order and U-Boot proper was
+	 * loaded from mmc1, swap mmc0 and mmc1 in the list.
+	 * If mmc1 comes first in the boot order and U-Boot proper was
+	 * loaded from mmc0, swap mmc0 and mmc1 in the list.
+	 */
+	if ((mmc0 < mmc1 && sd_booted) ||
+	    (mmc0 > mmc1 && !sd_booted)) {
+		mmc0[3] = '1';
+		mmc1[3] = '0';
+		debug("%s: set boot_targets to: %s\n", __func__, env);
+		env_set("boot_targets", env);
+	}
+
+	return 0;
+}
+
+int mmc_get_env_dev(void)
+{
+	const char *boot_device =
+		ofnode_read_chosen_string("u-boot,spl-boot-device");
+
+	if (!boot_device) {
+		debug("%s: /chosen/u-boot,spl-boot-device not set\n",
+		      __func__);
+		return CONFIG_SYS_MMC_ENV_DEV;
+	}
+
+	debug("%s: booted from %s\n", __func__, boot_device);
+
+	if (!strcmp(boot_device, "/mmc@ff370000"))
+		return 1;
+
+	if (!strcmp(boot_device, "/mmc@ff390000"))
+		return 0;
+
+	return CONFIG_SYS_MMC_ENV_DEV;
+}
+
+#if !IS_ENABLED(CONFIG_ENV_IS_NOWHERE)
+#error Please enable CONFIG_ENV_IS_NOWHERE
+#endif
+
+enum env_location arch_env_get_location(enum env_operation op, int prio)
+{
+	const char *boot_device =
+		ofnode_read_chosen_string("u-boot,spl-boot-device");
+
+	if (prio > 0)
+		return ENVL_UNKNOWN;
+
+	if (!boot_device) {
+		debug("%s: /chosen/u-boot,spl-boot-device not set\n",
+		      __func__);
+		return ENVL_NOWHERE;
+	}
+
+	debug("%s: booted from %s\n", __func__, boot_device);
+
+	if (IS_ENABLED(CONFIG_ENV_IS_IN_MMC) &&
+	    (!strcmp(boot_device, "/mmc@ff370000") ||
+	     !strcmp(boot_device, "/mmc@ff390000")))
+		return ENVL_MMC;
+
+	printf("%s: No environment available: booted from %s but U-Boot "
+	       "config does not allow loading environment from it.",
+	       __func__, boot_device);
+
+	return ENVL_NOWHERE;
+}
+
+int misc_init_r(void)
+{
+	const u32 cpuid_offset = 0x7;
+	const u32 cpuid_length = 0x10;
+	u8 cpuid[cpuid_length];
+	int ret;
+
+	ret = rockchip_cpuid_from_efuse(cpuid_offset, cpuid_length, cpuid);
+	if (ret)
+		return ret;
+
+	ret = rockchip_cpuid_set(cpuid, cpuid_length);
+	if (ret)
+		return ret;
+
+	ret = rockchip_setup_macaddr();
+	if (ret)
+		return ret;
+
+	setup_boottargets();
+
+	return 0;
+}