[Buildroot] [PATCH 3/3] configs/rock4b_defconfig: add support for Radxa ROCK-PI 4B board

[Jean-Paul Etienne <fractalclone@gmail.com>]

Add board config to support the Radxa ROCK-PI 4B board
with working WiFi, bluetooth and ethernet.

Signed-off-by: Jean-Paul Etienne <fractalclone@gmail.com>
---
 DEVELOPERS                                    |   2 +
 board/radxa/rock4b/extlinux.conf              |   4 +
 board/radxa/rock4b/genimage.cfg               |  22 +++++
 board/radxa/rock4b/linux.fragment             |   6 ++
 .../overlay/etc/modprobe.d/brcmfmac.conf      |   4 +
 .../overlay/etc/network/if-down.d/wpacli      |   1 +
 .../rock4b/overlay/etc/network/if-up.d/wpacli |  50 ++++++++++
 .../rock4b/overlay/etc/network/interfaces     |   9 ++
 .../rock4b/overlay/etc/wpa_supplicant.conf    |   3 +
 .../overlay/etc/wpa_supplicant/wpa_action.sh  |  20 ++++
 .../firmware/brcm/brcmfmac43456-sdio.clm_blob | Bin 0 -> 7163 bytes
 .../patches/linux-headers/linux-headers.hash  |   1 +
 board/radxa/rock4b/patches/linux/linux.hash   |   2 +
 board/radxa/rock4b/patches/uboot/uboot.hash   |   2 +
 board/radxa/rock4b/post-build.sh              |   9 ++
 board/radxa/rock4b/readme.txt                 |  93 ++++++++++++++++++
 configs/rock4b_defconfig                      |  62 ++++++++++++
 17 files changed, 290 insertions(+)
 create mode 100644 board/radxa/rock4b/extlinux.conf
 create mode 100644 board/radxa/rock4b/genimage.cfg
 create mode 100644 board/radxa/rock4b/linux.fragment
 create mode 100644 board/radxa/rock4b/overlay/etc/modprobe.d/brcmfmac.conf
 create mode 120000 board/radxa/rock4b/overlay/etc/network/if-down.d/wpacli
 create mode 100755 board/radxa/rock4b/overlay/etc/network/if-up.d/wpacli
 create mode 100644 board/radxa/rock4b/overlay/etc/network/interfaces
 create mode 100644 board/radxa/rock4b/overlay/etc/wpa_supplicant.conf
 create mode 100755 board/radxa/rock4b/overlay/etc/wpa_supplicant/wpa_action.sh
 create mode 100644 board/radxa/rock4b/overlay/lib/firmware/brcm/brcmfmac43456-sdio.clm_blob
 create mode 120000 board/radxa/rock4b/patches/linux-headers/linux-headers.hash
 create mode 100644 board/radxa/rock4b/patches/linux/linux.hash
 create mode 100644 board/radxa/rock4b/patches/uboot/uboot.hash
 create mode 100755 board/radxa/rock4b/post-build.sh
 create mode 100644 board/radxa/rock4b/readme.txt
 create mode 100644 configs/rock4b_defconfig

diff --git a/DEVELOPERS b/DEVELOPERS
index 2fd4c6e26f..04505b8e96 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1617,6 +1617,8 @@ N:	Jean Burgat <jeanburgat33@gmail.com>
 F:	package/openfpgaloader/
 
 N:	Jean-Paul Etienne <fractalclone@gmail.com>
+F:	board/radxa/rock4b
+F:	configs/rock4b_defconfig
 F:	package/brcmfmac_sdio-firmware
 F:	package/rockchip-rkdeveloptool
 
diff --git a/board/radxa/rock4b/extlinux.conf b/board/radxa/rock4b/extlinux.conf
new file mode 100644
index 0000000000..a0af1ea610
--- /dev/null
+++ b/board/radxa/rock4b/extlinux.conf
@@ -0,0 +1,4 @@
+label Radxa ROCK-PI 4B Linux
+  kernel /boot/Image
+  devicetree /boot/rk3399-rock-pi-4b.dtb
+  append root=/dev/mmcblk1p1 rw rootfstype=ext4 earlycon rootwait
diff --git a/board/radxa/rock4b/genimage.cfg b/board/radxa/rock4b/genimage.cfg
new file mode 100644
index 0000000000..966c869273
--- /dev/null
+++ b/board/radxa/rock4b/genimage.cfg
@@ -0,0 +1,22 @@
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot-tpl-spl-dtb {
+		in-partition-table = "no"
+		image = "idbloader.img"
+		offset = 32K
+	}
+
+	partition u-boot-dtb {
+		in-partition-table = "no"
+		image = "u-boot.itb"
+		offset = 8M
+		size = 30M
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+	}
+}
diff --git a/board/radxa/rock4b/linux.fragment b/board/radxa/rock4b/linux.fragment
new file mode 100644
index 0000000000..ce4b11de27
--- /dev/null
+++ b/board/radxa/rock4b/linux.fragment
@@ -0,0 +1,6 @@
+#
+# Disable the generic GPIO reset driver as it conflicts with
+# the reset-gpios of sdio bus controlling the wifi chip
+#
+
+# CONFIG_RESET_GPIO is not set
diff --git a/board/radxa/rock4b/overlay/etc/modprobe.d/brcmfmac.conf b/board/radxa/rock4b/overlay/etc/modprobe.d/brcmfmac.conf
new file mode 100644
index 0000000000..c997473bd5
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/modprobe.d/brcmfmac.conf
@@ -0,0 +1,4 @@
+# Disable Broadcom Frame Aggregation Feature
+# to fix authentication timeout problem for WiFi
+
+options brcmfmac feature_disable=0x2000
diff --git a/board/radxa/rock4b/overlay/etc/network/if-down.d/wpacli b/board/radxa/rock4b/overlay/etc/network/if-down.d/wpacli
new file mode 120000
index 0000000000..340f3ef9e6
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/network/if-down.d/wpacli
@@ -0,0 +1 @@
+../if-up.d/wpacli
\ No newline at end of file
diff --git a/board/radxa/rock4b/overlay/etc/network/if-up.d/wpacli b/board/radxa/rock4b/overlay/etc/network/if-up.d/wpacli
new file mode 100755
index 0000000000..983d84fc1e
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/network/if-up.d/wpacli
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+START_TRIES=3
+WPA_CLI_BIN="/usr/sbin/wpa_cli"
+WPA_ACTION_SCRIPT="/etc/wpa_supplicant/wpa_action.sh"
+
+# Run this script only for interfaces which have wpa-conf option
+[ -z "$IF_WPA_CONF" ] && exit 0
+
+if [ -n "$IF_WPA_IFACE" ]; then
+	WPA_IFACE="$IF_WPA_IFACE"
+else
+	WPA_IFACE="$IFACE"
+fi
+
+start_wpa_cli() {
+	count=0
+	while [ $count -lt $START_TRIES ]
+	do
+		[ -n "$(pidof wpa_supplicant)" ] && break
+		count=$((count + 1))
+		sleep 0.5
+	done
+
+	[ $count -eq $START_TRIES ] && return
+
+	sleep 0.5
+	$WPA_CLI_BIN -i "$WPA_IFACE" -a /etc/wpa_supplicant/wpa_action.sh -B
+}
+
+case "$MODE" in
+	start)
+		case "$PHASE" in
+			post-up)
+				start_wpa_cli&
+				;;
+		esac
+		;;
+
+	stop)
+		case "$PHASE" in
+			pre-down)
+				killall -q wpa_cli
+				$WPA_ACTION_SCRIPT "$WPA_IFACE" "DISCONNECTED"
+				;;
+		esac
+		;;
+esac
+
+exit 0
diff --git a/board/radxa/rock4b/overlay/etc/network/interfaces b/board/radxa/rock4b/overlay/etc/network/interfaces
new file mode 100644
index 0000000000..1646408d8f
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/network/interfaces
@@ -0,0 +1,9 @@
+auto lo
+iface lo inet loopback
+
+auto eth0
+iface eth0 inet dhcp
+
+auto wlan0
+iface wlan0 inet manual
+wpa-conf /etc/wpa_supplicant.conf
diff --git a/board/radxa/rock4b/overlay/etc/wpa_supplicant.conf b/board/radxa/rock4b/overlay/etc/wpa_supplicant.conf
new file mode 100644
index 0000000000..535d0a491b
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/wpa_supplicant.conf
@@ -0,0 +1,3 @@
+ctrl_interface=/var/run/wpa_supplicant
+ap_scan=1
+update_config=1
diff --git a/board/radxa/rock4b/overlay/etc/wpa_supplicant/wpa_action.sh b/board/radxa/rock4b/overlay/etc/wpa_supplicant/wpa_action.sh
new file mode 100755
index 0000000000..6d45f46e66
--- /dev/null
+++ b/board/radxa/rock4b/overlay/etc/wpa_supplicant/wpa_action.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+INTERFACE=$1
+ACTION=$2
+UDHCPC_PID_FILE="/var/run/udhcpc.$INTERFACE.pid"
+
+kill_udhcpc() {
+	[ -f "$UDHCPC_PID_FILE" ] || return
+	kill "$(cat "$UDHCPC_PID_FILE")" 1>/dev/null 2>&1
+}
+
+if [ "$ACTION" = "CONNECTED" ]
+then
+	kill_udhcpc
+	udhcpc -i "$INTERFACE" -b -R -p "$UDHCPC_PID_FILE"
+elif [ "$ACTION" = "DISCONNECTED" ]
+then
+	kill_udhcpc
+	ifconfig "$INTERFACE" 0.0.0.0
+fi
diff --git a/board/radxa/rock4b/overlay/lib/firmware/brcm/brcmfmac43456-sdio.clm_blob b/board/radxa/rock4b/overlay/lib/firmware/brcm/brcmfmac43456-sdio.clm_blob
new file mode 100644
index 0000000000000000000000000000000000000000..36b8652655e5bf1704cc3471eba91f7e836d9b05
GIT binary patch
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HcmV?d00001

diff --git a/board/radxa/rock4b/patches/linux-headers/linux-headers.hash b/board/radxa/rock4b/patches/linux-headers/linux-headers.hash
new file mode 120000
index 0000000000..5808d92afe
--- /dev/null
+++ b/board/radxa/rock4b/patches/linux-headers/linux-headers.hash
@@ -0,0 +1 @@
+../linux/linux.hash
\ No newline at end of file
diff --git a/board/radxa/rock4b/patches/linux/linux.hash b/board/radxa/rock4b/patches/linux/linux.hash
new file mode 100644
index 0000000000..f83883b936
--- /dev/null
+++ b/board/radxa/rock4b/patches/linux/linux.hash
@@ -0,0 +1,2 @@
+# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  37f0c5d5c242c1d604e87d48f08795e861a5a85f725b4ca11d0a538f12ff8cff  linux-6.18.8.tar.xz
diff --git a/board/radxa/rock4b/patches/uboot/uboot.hash b/board/radxa/rock4b/patches/uboot/uboot.hash
new file mode 100644
index 0000000000..b6a925ea4e
--- /dev/null
+++ b/board/radxa/rock4b/patches/uboot/uboot.hash
@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  b60d5865cefdbc75da8da4156c56c458e00de75a49b80c1a2e58a96e30ad0d54  u-boot-2026.01.tar.bz2
diff --git a/board/radxa/rock4b/post-build.sh b/board/radxa/rock4b/post-build.sh
new file mode 100755
index 0000000000..5b50e1ef81
--- /dev/null
+++ b/board/radxa/rock4b/post-build.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname "$0")"
+
+install -m 0644 -D "$BOARD_DIR"/extlinux.conf "$TARGET_DIR"/boot/extlinux/extlinux.conf
+
+# Append debugfs in fstab if not present
+grep -F -q "debugfs" "$TARGET_DIR"/etc/fstab || \
+	echo "none	/sys/kernel/debug  debugfs  defaults  0  0" >> "$TARGET_DIR"/etc/fstab
diff --git a/board/radxa/rock4b/readme.txt b/board/radxa/rock4b/readme.txt
new file mode 100644
index 0000000000..a6a7d5c7c1
--- /dev/null
+++ b/board/radxa/rock4b/readme.txt
@@ -0,0 +1,93 @@
+Intro
+=====
+
+This default configuration will allow you to start experimenting with the
+buildroot environment for the Radxa ROCK 4B. With the current configuration
+it will bring-up the board, and allow access through the serial console or
+via ssh if the board is plugged via ethernet port or has WiFi network configured.
+
+Radxa ROCK 4B link:
+https://radxa.com/products/rock4/4b
+
+Documentation link:
+https://docs.radxa.com/en/rock4/rock4ab-se
+
+GPIO Interface link:
+https://docs.radxa.com/en/rock4/rock4ab-se/hardware-design/hardware-interface?model=ROCK+4B
+
+This configuration uses mainline ATF, U-Boot and kernel.
+
+How to build
+============
+
+    $ make rock4b_defconfig
+    $ make
+
+How to write the SD card
+========================
+
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
+
+Copy the bootable "sdcard.img" onto an SD card with "dd":
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/sdX
+  $ sudo sync
+
+Insert the micro SD card in your Radxa ROCK 4B and power it up. The console
+is available on UART2 on the GPIO connector, 1500000bps 8N1.
+
+How to flash the board eMMC
+===========================
+
+Before building the sdcard.img for use on the board eMMC, you'll have to
+edit the board/radxa/rock4b/extlinux.conf file with root=/dev/mmcblk0p1
+
+Once the build process is done, flashing the sdcard.img on the board
+eMMC is achieved using the rkdeveloptool tool found in output/host/bin/
+as follows:
+1) Download the Flash loader binary for the board from the following link:
+   https://github.com/radxa/rkbin/blob/9840e87723eef7c41235b89af8c049c1bcd3d133/bin/rk33/rk3399_loader_spinor_v1.15.114.bin
+
+2) Follow the process given in the following link to start the board in Maskrom
+   https://docs.radxa.com/en/rock4/rock4ab-se/low-level-dev/maskrom/linux?model=Without+onboard+eMMC
+
+2) Once done, use the rkdeveloptool tool load the Flash loader binary onto the board as follows:
+   $ sudo ./output/host/bin/rkdeveloptool db PATH_TO_LOADER/rk3399_loader_spinor_v1.15.114.bin
+
+2) Once done, use the rkdeveloptool tool to flash the sdcard.img on the eMMC as follows:
+
+   $ sudo ./output/host/bin/rkdeveloptool wl 0 output/images/sdcard.img
+
+3) Once done reboot as follows:
+
+   $ sudo ./output/host/bin/rkdeveloptool rd
+
+
+How to setup WiFi config via console
+=====================================
+Once logged in do the following to setup the WiFi config:
+
+  $ wpa_cli
+
+  This will run the wpa_cli command in interactive mode.
+  Once wpa_cli has started do the following:
+
+  > add_network
+
+  This will create a network entry and will return its index
+  The following commands assumes index 0 is returned
+
+  > set_network 0 ssid "MY_SSID"
+  > set_network 0 psk "MY_PASSPHARSE"
+  > enable_network 0
+  > save_config
+  > quit
+
+  As the configuration include mdns, you can access the board
+  over your local network using the name rock-4b.local,
+  for example:
+
+  $ ping -c 1 rock-4b.local
+  PING rock-4b.local (192.168.1.5) 56(84) bytes of data.
+  64 bytes from 192.168.1.5: icmp_seq=1 ttl=64 time=8.48 ms
diff --git a/configs/rock4b_defconfig b/configs/rock4b_defconfig
new file mode 100644
index 0000000000..c2f99b7df2
--- /dev/null
+++ b/configs/rock4b_defconfig
@@ -0,0 +1,62 @@
+BR2_aarch64=y
+BR2_cortex_a72_a53=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
+BR2_GLOBAL_PATCH_DIR="board/radxa/rock4b/patches"
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
+BR2_TARGET_GENERIC_HOSTNAME="rock-4b"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for Radxa ROCK-PI 4B"
+BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
+BR2_ROOTFS_OVERLAY="board/radxa/rock4b/overlay"
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/radxa/rock4b/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/radxa/rock4b/genimage.cfg"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.8"
+BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/radxa/rock4b/linux.fragment"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="rockchip/rk3399-rock-pi-4b"
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="512M"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_LATEST_LTS_2_12_VERSION=y
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="rk3399"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_IMAGES=""
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_NEEDS_ARM32_TOOLCHAIN=y
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2026.01"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="rock-pi-4-rk3399"
+BR2_TARGET_UBOOT_NEEDS_DTC=y
+BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
+BR2_TARGET_UBOOT_NEEDS_PYELFTOOLS=y
+BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
+BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
+BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y
+BR2_TARGET_UBOOT_NEEDS_ATF_BL31_ELF=y
+BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
+BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot.itb"
+BR2_TARGET_UBOOT_SPL=y
+BR2_TARGET_UBOOT_SPL_NAME="idbloader.img"
+BR2_PACKAGE_BLUEZ_TOOLS=y
+BR2_PACKAGE_BLUEZ5_UTILS=y
+BR2_PACKAGE_BLUEZ5_UTILS_CLIENT=y
+BR2_PACKAGE_BRCMFMAC_SDIO_FIRMWARE=y
+BR2_PACKAGE_IW=y
+BR2_PACKAGE_MDNSD=y
+BR2_PACKAGE_OPENSSH=y
+BR2_PACKAGE_WIRELESS_REGDB=y
+BR2_PACKAGE_WIRELESS_TOOLS=y
+BR2_PACKAGE_WIRELESS_TOOLS_LIB=y
+BR2_PACKAGE_WPA_SUPPLICANT=y
+BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+BR2_PACKAGE_WPA_SUPPLICANT_AUTOSCAN=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_ROCKCHIP_RKDEVELOPTOOL=y
-- 
2.55.0

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