Merge pull request #57 from brain-hackers/ci-next

Upgrade submodules etc.

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     outputs:
       upload_url: ${{ steps.create_release.outputs.upload_url }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0
           submodules: false
@@ -41,11 +41,11 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [create_release]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi qemu-user-static debootstrap python3-pip
       - name: Upgrade pip and setuptools
@@ -91,11 +91,11 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [create_release]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
       - name: Configure for Linux
@@ -128,9 +128,12 @@ jobs:
     strategy:
       matrix:
         include:
-          - model: g5300
+          - model: a7200
             nk: edna3exe.bin
             lilo: gen2.bin
+          - model: a7400
+            nk: edna3exe.bin
+            lilo: gen2_7400.bin
           - model: sh1
             nk: edsa1exe.bin
             lilo: gen3_1.bin
@@ -154,11 +157,11 @@ jobs:
             lilo: gen3_7.bin
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi qemu-user-static debootstrap
       - name: Build nkbin-maker
@@ -200,11 +203,11 @@ jobs:
           - model: h1
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
       - name: Configure for U-Boot
@@ -234,7 +237,7 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [create_release]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Make /opt writable
@@ -245,7 +248,7 @@ jobs:
           unzip -q cegcc.zip
           cp -r cegcc /opt/
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install kpartx build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabi qemu-user-static debootstrap
       - name: Configure for Linux
@@ -277,11 +280,11 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [create_release]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true
       - name: Workaround for apt update failure
-        run: sudo rm /etc/apt/sources.list.d/github_git-lfs.*
+        run: sudo rm -f /etc/apt/sources.list.d/github_git-lfs.*
       - name: Install deps
         run: sudo apt update && sudo apt install kpartx build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev lzop qemu-user-static debootstrap
       - name: Upgrade pip and setuptools

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "brainlilo"]
 	path = brainlilo
 	url = https://github.com/brain-hackers/brainlilo.git
+[submodule "buildroot"]
+	path = buildroot
+	url = https://github.com/brain-hackers/buildroot.git

Makefile

@@ -135,7 +135,6 @@ lilobuild:
 liloclean:
 	make -C ./brainlilo clean
 
-
 brainux:
 	@if [ "$(shell uname)" != "Linux" ]; then \
 		echo "Debootstrap is only available in Linux!"; \
@@ -144,21 +143,32 @@ brainux:
 	sudo mkdir -p brainux
 	@if [ "$(CI)" = "true" ]; then \
 		echo "I'm in CI and debootstrap without cache."; \
-		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign buster brainux/; \
+		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign bullseye brainux/; \
 	else \
-		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign buster brainux/ http://localhost:65432/debian/; \
+		sudo debootstrap --arch=$(ROOTFS_CROSS) --foreign bullseye brainux/ http://localhost:65432/debian/; \
 	fi
 	sudo cp /usr/bin/qemu-arm-static brainux/usr/bin/
 	sudo cp ./os-brainux/setup_brainux.sh brainux/
+	sudo ./os-brainux/override-pre.sh ./os-brainux/override ./brainux
 	sudo -E chroot brainux /setup_brainux.sh
 	sudo rm brainux/setup_brainux.sh
 	sudo ./os-brainux/override.sh ./os-brainux/override ./brainux
 
+buildroot_rootfs:
+	make -C buildroot brain_imx28_defconfig
+	make -C buildroot -j 12
+	sudo mkdir -p buildroot_rootfs
+	sudo tar -C ./buildroot_rootfs -xf buildroot/output/images/rootfs.tar
+
 image/sd.img: clean_work
-	./image/build_image.sh
+	./image/build_image.sh brainux sd.img 3072
 
 image/sd_x1.img: clean_work
-	./image/build_image_x1.sh
+	./image/build_image_x1.sh brainux sd_x1.img 3072
+
+image/sd_buildroot.img: clean_work
+	./image/build_image.sh buildroot_rootfs sd_buildroot.img 128
+
 
 .PHONY:
 clean_work:

README.md

@@ -94,8 +94,8 @@ Build Linux
 1. Confirm that `linux-brain/arch/arm/boot/zImage` exists.
 
 
-Bootstrap Debian 11 (bullseye)
-------------------------------
+Build a Debian rootfs
+---------------------
 
 1. Run `make ldefconfig lbuild`.
 
@@ -107,9 +107,23 @@ Bootstrap Debian 11 (bullseye)
 
 1. Confirm that `image/sd.img` is built and burn it to an SD card.
 
+
+Build a Buildroot rootfs
+------------------------
+
+Buildroot rootfs aims to be the most lightweight rootfs for experimental use. `make buildroot_rootfs` runs the defconfig target for rootfs-only build and then builds the rootfs tarball and a CPIO archive for initramfs. `make image/sd_buildroot.img` makes a bootable SD image in `image` directory like the typical Brainux SD image.
+
+If you want to customize the build of Buildroot, `cd` into `buildroot` and use the following targets:
+
+ - `make menuconfig` to change the configuration
+ - `make` to build the rootfs (`-j` option might give you extra speed)
+
+`image/sd_buildroot.img` target expects presence of the tarball at `buildroot/output/images/rootfs.tar`. You'll have to `clean` and rebuild every time you change the Buildroot's config before making the SD image.
+
+
 Known issues
 ----------------------------------------
-If you using gcc 10 for host compiler, `make ubuild` may fail.  
+If you use GCC 10 for the host compiler, `make ubuild` may fail.
 To complete build, open `/u-boot-brain/scripts/dtc/dtc-lexer.lex.c` or `/u-boot-brain/scripts/dtc/dtc-parser.tab.c` then comment out `YYLTYPE yylloc;`
 
 Watch changes in submodules & auto-build

brainlilo

@@ -1 +1 @@
-Subproject commit c826f2581ea8de6c32565be7ffa632c9766d5385
+Subproject commit 2ec8f7827e40ec8dfe6b7f5b0200e1effaf1b855

buildroot

@@ -0,0 +1 @@
+Subproject commit cf3ea901082f470449bd174272d8407e039522b2

image/LICENSE

@@ -0,0 +1,23 @@
+*** exeopener ***
+
+MIT License
+
+Copyright (c) 2022 Chiharu Shirasaka
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

image/build_image.sh

@@ -5,13 +5,16 @@ JOBS=$(nproc)
 REPO=$(git rev-parse --show-toplevel)
 WORK=${REPO}/image/work
 LINUX=${REPO}/linux-brain
-IMG=${REPO}/image/sd.img
+ROOTFS=$1
+IMG_NAME=$2
+IMG=${REPO}/image/${IMG_NAME}
+SIZE_M=$3
 export CROSS_COMPILE=arm-linux-gnueabi-
 
 mkdir -p ${WORK}
 mkdir -p ${WORK}/lilobin
 
-for i in "g5300" "sh1" "sh2" "sh3" "sh4" "sh5" "sh6" "sh7"; do
+for i in "a7200" "a7400" "sh1" "sh2" "sh3" "sh4" "sh5" "sh6" "sh7"; do
     NUM=$(echo $i | sed -E 's/sh//g')
 
     make -C ${REPO}/u-boot-brain distclean pw${i}_defconfig
@@ -19,9 +22,11 @@ for i in "g5300" "sh1" "sh2" "sh3" "sh4" "sh5" "sh6" "sh7"; do
     ${REPO}/nkbin_maker/bsd-ce ${REPO}/u-boot-brain/u-boot.bin
 
     case $i in
-        "g5300")
+        "a7200")
             mv ${REPO}/nk.bin ${WORK}/edna3exe.bin
             mv ${REPO}/u-boot-brain/u-boot.bin ${WORK}/lilobin/gen2.bin;;
+        "a7400")
+            mv ${REPO}/u-boot-brain/u-boot.bin ${WORK}/lilobin/gen2_7400.bin;;
         "sh1" | "sh2" | "sh3")
             mv ${REPO}/nk.bin ${WORK}/edsa${NUM}exe.bin
             mv ${REPO}/u-boot-brain/u-boot.bin ${WORK}/lilobin/gen3_${NUM}.bin;;
@@ -34,7 +39,7 @@ for i in "g5300" "sh1" "sh2" "sh3" "sh4" "sh5" "sh6" "sh7"; do
     esac
 done
 
-dd if=/dev/zero of=${IMG} bs=1M count=3072
+dd if=/dev/zero of=${IMG} bs=1M count=${SIZE_M}
 
 START1=2048
 SECTORS1=$((1024 * 1024 * 64 / 512))
@@ -49,7 +54,7 @@ sfdisk ${IMG} < ${WORK}/part.sfdisk
 
 sudo kpartx -av ${IMG}
 
-LOOPDEV=$(losetup -l | grep sd.img | grep -o 'loop.' | tail -n 1)
+LOOPDEV=$(losetup -l | grep ${IMG_NAME} | grep -o 'loop.' | tail -n 1)
 
 sudo mkfs.fat -n boot -F32 -v -I /dev/mapper/${LOOPDEV}p1
 sudo mkfs.ext4 -L rootfs /dev/mapper/${LOOPDEV}p2
@@ -71,13 +76,13 @@ sudo touch "${LILO}/index.din"
 sudo touch "${LILO}/AppMain.cfg"
 sudo cp ${REPO}/brainlilo/*.dll "${LILO}/"
 sudo cp ${REPO}/brainlilo/BrainLILO.exe "${LILO}/AppMain_.exe"
-gzip -d ${REPO}/image/exeopener.exe.gz
+gzip -cd ${REPO}/image/exeopener.exe.gz > ${REPO}/image/exeopener.exe
 sudo cp ${REPO}/image/exeopener.exe "${LILO}/AppMain.exe"
 
 sudo mkdir -p ${WORK}/p1/loader
 sudo cp ${WORK}/lilobin/*.bin ${WORK}/p1/loader/
 
-sudo cp -ra ${REPO}/brainux/* ${WORK}/p2/
+sudo cp -ra ${REPO}/${ROOTFS}/* ${WORK}/p2/
 
 sudo umount ${WORK}/p1 ${WORK}/p2
 sudo kpartx -d ${IMG}

linux-brain

@@ -1 +1 @@
-Subproject commit e342c1c00092283097a51f236dfcccd503c44925
+Subproject commit afbb7e017623f0963270cbad512f1d83b83a3d5b

os-brainux/override-pre.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -uex -o pipefail
+
+SRC=$1
+DST=$2
+
+install -g root -o root -m 0644 $SRC/lib/systemd/system/boot.mount $DST/lib/systemd/system/boot.mount
+install -g root -o root -m 0644 $SRC/lib/systemd/system/rndis_gadget.service $DST/lib/systemd/system/rndis_gadget.service
+install -g root -o root -m 0755 $SRC/usr/bin/enable_rndis_gadget $DST/usr/bin/enable_rndis_gadget

os-brainux/override.sh

@@ -5,10 +5,8 @@ set -uex -o pipefail
 SRC=$1
 DST=$2
 
-install -g root -o root -m 0644 $SRC/usr/lib/os-release $DST/usr/lib/os-release
-install -g root -o root -m 0644 $SRC/etc/issue $DST/etc/issue
-install -g root -o root -m 0644 $SRC/etc/issue.net $DST/etc/issue.net
 install -g root -o root -m 0644 $SRC/etc/motd $DST/etc/motd
+install -g root -o root -m 0440 $SRC/etc/sudoers $DST/etc/sudoers
 
 install -g root -o root -m 0644 $SRC/etc/X11/xorg.conf $DST/etc/X11/xorg.conf
 install -g root -o root -m 0644 $SRC/etc/X11/Xsession.d/96calibrate $DST/etc/X11/Xsession.d/96calibrate

os-brainux/override/etc/issue

@@ -1,2 +0,0 @@
-Brainux GNU/Linux 10 \n \l
-

os-brainux/override/etc/issue.net

@@ -1 +0,0 @@
-Brainux GNU/Linux 10

os-brainux/override/etc/sudoers

@@ -0,0 +1,27 @@
+#
+# This file MUST be edited with the 'visudo' command as root.
+#
+# Please consider adding local content in /etc/sudoers.d/ instead of
+# directly modifying this file.
+#
+# See the man page for details on how to write a sudoers file.
+#
+Defaults	env_reset,pwfeedback
+Defaults	mail_badpass
+Defaults	secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+
+# Host alias specification
+
+# User alias specification
+
+# Cmnd alias specification
+
+# User privilege specification
+root	ALL=(ALL:ALL) ALL
+
+# Allow members of group sudo to execute any command
+%sudo	ALL=(ALL:ALL) ALL
+
+# See sudoers(5) for more information on "@include" directives:
+
+@includedir /etc/sudoers.d

os-brainux/override/lib/systemd/system/boot.mount

@@ -0,0 +1,10 @@
+[Unit]
+Description=Mount boot partition
+
+[Mount]
+What=/dev/mmcblk1p1
+Where=/boot
+Options=ro
+
+[Install]
+WantedBy=multi-user.target

os-brainux/override/lib/systemd/system/rndis_gadget.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=Enable RNDIS USB Gadget
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/enable_rndis_gadget
+
+[Install]
+WantedBy=multi-user.target

os-brainux/override/usr/bin/enable_rndis_gadget

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+g=/sys/kernel/config/usb_gadget/eth
+
+mkdir ${g}
+
+echo "0x3066" > ${g}/bcdDevice
+echo "1" > ${g}/os_desc/use
+echo "0xcd" > ${g}/os_desc/b_vendor_code
+echo "MSFT100" > ${g}/os_desc/qw_sign
+
+mkdir ${g}/functions/rndis.rn0
+echo "RNDIS" > ${g}/functions/rndis.rn0/os_desc/interface.rndis/compatible_id
+echo "5162001" > ${g}/functions/rndis.rn0/os_desc/interface.rndis/sub_compatible_id
+echo "8a:15:8b:44:3a:02" > ${g}/functions/rndis.rn0/dev_addr
+echo "8a:15:8b:44:3a:01" > ${g}/functions/rndis.rn0/host_addr
+
+mkdir ${g}/configs/c.1
+ln -s ${g}/functions/rndis.rn0 ${g}/configs/c.1/
+
+echo "ci_hdrc.0" > ${g}/UDC
+
+sleep 1
+ifconfig usb0 up
+dhclient

os-brainux/override/usr/lib/os-release

@@ -1,9 +0,0 @@
-PRETTY_NAME="Brainux GNU/Linux 11 (bullseye)"
-NAME="Brainux GNU/Linux"
-VERSION_ID="11"
-VERSION="11 (bullseye)"
-VERSION_CODENAME=bullseye
-ID=debian
-HOME_URL="https://github.com/brain-hackers/README"
-SUPPORT_URL="https://github.com/brain-hackers/buildbrain"
-BUG_REPORT_URL="https://github.com/brain-hackers/buildbrain"

os-brainux/setup_brainux.sh

@@ -33,6 +33,7 @@ APT::Install-Recommends "0";
 APT::Install-Suggests "0";
 EOF
 
+# locales: locale has to be set before going any further
 apt update -y
 DEBIAN_FRONTEND=noninteractive \
     apt install -y locales
@@ -50,22 +51,48 @@ rm /etc/localtime
 ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
 
 echo "brain" > /etc/hostname
+
+# Install packagecloud repository
+# Reference: https://packagecloud.io/brainhackers/brainux/install
+
+# curl, ca-certificates: downloads the GPG key from packagecloud
+# gnupg, debian-archive-keyring: packagecloud verification dependency
+DEBIAN_FRONTEND=noninteractive \
+    apt install -y curl ca-certificates gnupg debian-archive-keyring
+
+# apt-transport-https can be installed after debian-archive-keyring being installed
+DEBIAN_FRONTEND=noninteractive \
+    apt install -y apt-transport-https
+
+# Install GPG key and packagecloud repository config
+mkdir -p /etc/apt/keyrings
+curl -fsSL "https://packagecloud.io/brainhackers/brainux/gpgkey" \
+    | gpg --dearmor > /etc/apt/keyrings/brainhackers_brainux-archive-keyring.gpg
+
+cat <<EOF > /etc/apt/sources.list.d/packagecloud.list
+deb [signed-by=/etc/apt/keyrings/brainhackers_brainux-archive-keyring.gpg] https://packagecloud.io/brainhackers/brainux/any/ any main
+deb-src [signed-by=/etc/apt/keyrings/brainhackers_brainux-archive-keyring.gpg] https://packagecloud.io/brainhackers/brainux/any/ any main
+EOF
+
+# Fetch packagecloud repository
+apt update -y
+
 DEBIAN_FRONTEND=noninteractive \
     apt install -y dialog sudo \
                    libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev \
-                   xserver-xorg xserver-xorg-video-fbdev xserver-xorg-dev xserver-xorg-input-evdev xinput-calibrator xorg-dev x11-apps xinit \
+                   xserver-xorg xserver-xorg-video-fbdev xserver-xorg-dev xserver-xorg-input-evdev xinput-calibrator xorg-dev x11-apps x11-ico-dvd xinit \
                    jwm \
-                   weston xwayland \
                    bash tmux vim htop \
                    midori pcmanfm lxterminal xterm gnome-terminal fbterm uim-fep uim-anthy fonts-noto-cjk \
-                   dbus udev alsa-utils usbutils iw fake-hwclock\
+                   dbus udev alsa-utils usbutils iw fake-hwclock systemd-timesyncd\
                    build-essential flex bison pkg-config autotools-dev libtool autoconf automake device-tree-compiler \
                    python3 python3-dev python3-setuptools python3-wheel python3-pip python3-smbus \
-                   resolvconf net-tools ssh openssh-client avahi-daemon curl wget git \
-		   network-manager zip neofetch sl python3-numpy ipython3 netsurf-gtk
+                   resolvconf net-tools ssh openssh-client avahi-daemon wget git \
+                   network-manager zip neofetch sl python3-numpy ipython3 netsurf-gtk fcitx-anthy
 
+# Packages from packagecloud
 DEBIAN_FRONTEND=noninteractive \
-    apt install -y --install-recommends fcitx-anthy
+    apt install -y --install-recommends brain-config
 
 systemctl enable fake-hwclock
 
@@ -73,10 +100,11 @@ systemctl enable fake-hwclock
 DEBIAN_FRONTEND=noninteractive \
     apt install -y libpam0g-dev libxcb-xkb-dev
 cd /
-git clone --recurse-submodules https://github.com/nullgemm/ly.git
+git clone --recurse-submodules -b master-24f017e https://github.com/brain-hackers/ly.git
 cd ly
 make
 make install
+make installsystemd
 cd /
 rm -r ly
 systemctl enable ly
@@ -107,6 +135,12 @@ ttymxc0
 ttyLP0
 EOF
 
+# Enable /boot mount
+systemctl enable boot.mount
+
+# Enable RNDIS gadget
+systemctl enable rndis_gadget
+
 # Get wild
 cat <<EOF > /etc/apt/sources.list
 deb http://deb.debian.org/debian bullseye main contrib non-free

os-buildroot/override/root/blink.sh

@@ -0,0 +1,112 @@
+#!/bin/sh
+set -u
+
+VERBOSE=0
+PIN=""
+SLEEP=1
+GPIOS=""
+
+while getopts "hvr:p:s:" OPT; do
+    case "$OPT" in
+    h)
+        echo "Usage:   blink.sh [-hv] [-r PIN_RANGE_FROM-PIN_RANGE_TO] [-p PIN] [-s SLEEP_SEC]"
+        echo "Example: blink.sh -r 0-10 -p 12"
+        echo "         (blink from GPIO 0 to 10 and 12)"
+        exit 0
+        ;;
+    v)
+        VERBOSE=1
+        ;;
+    r)
+        RE='^([0-9]+)-([0-9]+)$'
+        if echo $OPTARG | grep -qvE $RE; then
+            echo "Error: invalid range: $OPTARG"
+            exit 1
+        fi
+        FROM=$(echo $OPTARG | sed -E "s/$RE/\\1/")
+        TO=$(echo $OPTARG | sed -E "s/$RE/\\2/")
+        GPIOS="$GPIOS$(seq -s " " $FROM $TO) "
+        ;;
+    p)
+        if echo $OPTARG | grep -qvE "^[0-9]+$"; then
+            echo "Error: invalid pin number: $OPTARG"
+            exit 1
+        fi
+        GPIOS="$GPIOS$OPTARG "
+        ;;
+    s)
+        if echo $OPTARG | grep -qvE "^[0-9]+$"; then
+            echo "Error: invalid sleep duration: $OPTARG"
+            exit 1
+        fi
+        SLEEP=$OPTARG
+        ;;
+    esac
+done
+
+if [ $VERBOSE -eq 1 ]; then
+    echo "Pins to iterate over: $GPIOS"
+fi
+
+if [ "$(id -u)" -ne "0" ]; then
+    echo "Error: please run as root"
+    exit 1
+fi
+
+AVAILABLE_GPIOS=""
+
+export_gpio() {
+    echo $1 > /sys/class/gpio/export
+}
+
+set_direction() {
+    echo out > /sys/class/gpio/gpio$1/direction
+}
+
+set_value() {
+    echo $2 > /sys/class/gpio/gpio$1/value
+}
+
+for i in $GPIOS; do
+    if [ ! -e "/sys/class/gpio/gpio$i" ]; then
+        export_gpio $i 2>/dev/null
+        if [ $? -ne 0 ]; then
+            echo "Error: failed to export the pin $i"
+            continue
+        fi
+    fi
+
+    set_direction $i 2>/dev/null
+    if [ $? -ne 0 ]; then
+        # Ignore the failure if the actual direction is out
+        if grep -vq "out" /dsys/class/gpio/gpio$i/direction; then
+            echo "Error: failed to set the direction of the pin $i to out"
+            continue
+        fi
+    fi
+
+    AVAILABLE_GPIOS="$AVAILABLE_GPIOS$i "
+done
+
+echo "Available GPIOs: $AVAILABLE_GPIOS"
+
+while [ 1 ]; do
+    for i in $AVAILABLE_GPIOS; do
+        set_value $i 1 2>/dev/null
+        if [ $? -ne 0 ]; then
+            echo "Warning: failed to set the value of the pin $i to high"
+        fi
+    done
+
+    sleep $SLEEP
+
+    for i in $AVAILABLE_GPIOS; do
+        set_value $i 0 2>/dev/null
+        if [ $? -ne 0 ]; then
+            echo "Warning: failed to set the value of the pin $i to low"
+        fi
+    done
+
+    sleep $SLEEP
+done
+

u-boot-brain

@@ -1 +1 @@
-Subproject commit 0449ff1430e6d3eb3d0086aaab1e7a74078f8085
+Subproject commit e8fc0d0cf39d9cd06245ef1777d1cf54258e5cb6