Add kernel module build files

.github/workflows/build.yml

@@ -21,20 +21,24 @@ jobs:
           sudo apt-get update
           sudo apt-get install --yes --no-install-recommends libguestfs-tools qemu-user-static binfmt-support
           curl -LO https://raw.githubusercontent.com/ev3dev/brickstrap/master/src/brickstrap.sh
-      - name: build sling and sinter
+      - name: Build sling and sinter
         run: ./build_sling.sh
-      - name: build qrcode generator
+      - name: Build QR code generator
         run: ./build_qrcode.sh
-      - name: build nus login program
+      - name: Build prompt for NUS_STU login
         run: ./build_prompt.sh
-      - name: build uuidtob62
+      - name: Build uuidtob62 CLI tool
         run: ./build_uuidtob62.sh
-      - name: check the outputs
+      - name: Build RTL8821CU Wi-Fi driver
+        run: ./build_driver.sh
+      - name: Check the outputs
         run: |
-          file build-ev3/sling build-ev3/sinter_host file build-ev3/executables/show_qrcode build-ev3/executables/nus_login build-ev3/executables/uuidtob62
+          file build-ev3/sling build-ev3/sinter_host \
+          file build-ev3/executables/show_qrcode build-ev3/executables/nus_login build-ev3/executables/uuidtob62 \
+          file image/rtl8821cu-driver/8821cu.ko image/rtl8821cu-driver/8821cu.conf
       - name: make vmlinuz readable
         run: sudo chmod 755 /boot/vmlinuz*
-      - name: build image
+      - name: Build EV3-Source image
         run: ./build_image.sh
       - uses: actions/upload-artifact@v2
         if: ${{ github.event_name == 'workflow_dispatch' }}

build_driver.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -euxo pipefail
+SCRIPT_DIR="$(dirname "$(realpath -s "${BASH_SOURCE[0]}")")"
+IMAGE_NAME="sourceacademy/rtl8821cu"
+OUTPUT_DIR="image/rtl8821cu-driver"
+
+cd rtl8821cu-driver
+docker build -t "$IMAGE_NAME" .
+
+cd "$SCRIPT_DIR"
+mkdir -p "$OUTPUT_DIR"
+cd "$OUTPUT_DIR"
+docker run --rm -w /root/work/rtl8821cu/ "$IMAGE_NAME" cat 8821cu.ko > 8821cu.ko
+docker run --rm -w /root/work/rtl8821cu/ "$IMAGE_NAME" cat 8821cu.conf > 8821cu.conf
+
+# Clean up
+docker rmi "$IMAGE_NAME"

image/Dockerfile

@@ -3,8 +3,8 @@ FROM ev3dev/ev3dev-stretch-ev3-base
 COPY executables/uuidtob62 sling sinter_host /usr/local/bin/
 
 # Copy WiFi drivers
-COPY rtl8812cu-driver/8821cu.conf /etc/modprobe.d/
-COPY rtl8812cu-driver/8821cu.ko /lib/modules/4.14.117-ev3dev-2.3.5-ev3/drivers/net/wireless/
+COPY rtl8821cu-driver/8821cu.conf /etc/modprobe.d/
+COPY rtl8821cu-driver/8821cu.ko /lib/modules/4.14.117-ev3dev-2.3.5-ev3/drivers/net/wireless/
 
 # Copy configurations and run setup
 COPY bootstrap.sh start-sling.sh sling.service panel.service show-secret.sh show-qr.sh /usr/local/bin/

rtl8821cu-driver/Dockerfile

@@ -0,0 +1,3 @@
+FROM --platform=amd64 ubuntu:20.04
+COPY setup.sh /root
+RUN ["bash", "-c", "chmod 755 /root/setup.sh && exec /root/setup.sh"]

rtl8821cu-driver/setup.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/bash
+set -euxo pipefail
+
+GNU_PATH="/usr/lib/x86_64-linux-gnu"
+WORKDIR="$HOME/work"
+
+# Install dependencies
+apt-get update
+apt-get install -y software-properties-common
+apt-add-repository ppa:ev3dev/tools
+apt-get install -y wget git build-essential ncurses-dev fakeroot bc u-boot-tools lzop flex bison libssl-dev gcc-arm-linux-gnueabihf
+
+wget https://releases.linaro.org/components/toolchain/binaries/6.4-2018.05/arm-linux-gnueabihf/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
+tar xf gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
+mv gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf "$GNU_PATH/gcc-linaro-arm-linux-gnueabihf-6.4"
+
+# Fix error due to deprecated git:// protocol on GitHub
+git config --global url."https://".insteadOf git://
+
+# Create working directory
+mkdir -p $WORKDIR
+cd $WORKDIR
+
+# Clone environment
+git clone --depth 1 --recursive --branch ev3dev-stretch https://github.com/ev3dev/ev3dev-buildscripts.git
+git clone --depth 1 --recursive --branch ev3dev-stretch https://github.com/ev3dev/ev3-kernel.git
+
+# Update submodule
+cd ev3-kernel/drivers/lego
+git pull origin ev3dev-stretch
+cd $WORKDIR
+
+# Build the EV3 kernel
+cd ev3dev-buildscripts
+echo "export EV3DEV_MAKE_ARGS=-j$(nproc)" > local-env
+./build-kernel
+cd $WORKDIR
+
+# Download Wi-Fi driver
+git clone --depth 1 https://gitee.com/coolflyreg163/rtl8821cu.git
+cd rtl8821cu
+
+# Compile Wi-Fi driver
+BIN_PATH="$GNU_PATH/gcc-linaro-arm-linux-gnueabihf-6.4/bin"
+make ARCH=arm KVER=4.14 \
+KSRC="$WORKDIR/ev3dev-buildscripts/build-area/linux-ev3dev-ev3-obj" \
+CC="$BIN_PATH/arm-linux-gnueabihf-gcc" \
+LD="$BIN_PATH/arm-linux-gnueabihf-ld"
+
+