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#!/bin/bash
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#
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# Setup RPi2/3 config and cmdline
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#
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# Load utility functions
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. ./functions.sh
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if [ "$BUILD_KERNEL" = true ] ; then
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if [ -n "$RPI_FIRMWARE_DIR" ] && [ -d "$RPI_FIRMWARE_DIR" ] ; then
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# Install boot binaries from local directory
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cp "${RPI_FIRMWARE_DIR}"/boot/bootcode.bin "${BOOT_DIR}"/bootcode.bin
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cp "${RPI_FIRMWARE_DIR}"/boot/fixup.dat "${BOOT_DIR}"/fixup.dat
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cp "${RPI_FIRMWARE_DIR}"/boot/fixup_cd.dat "${BOOT_DIR}"/fixup_cd.dat
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cp "${RPI_FIRMWARE_DIR}"/boot/fixup_x.dat "${BOOT_DIR}"/fixup_x.dat
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cp "${RPI_FIRMWARE_DIR}"/boot/start.elf "${BOOT_DIR}"/start.elf
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cp "${RPI_FIRMWARE_DIR}"/boot/start_cd.elf "${BOOT_DIR}"/start_cd.elf
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cp "${RPI_FIRMWARE_DIR}"/boot/start_x.elf "${BOOT_DIR}"/start_x.elf
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else
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# Create temporary directory for boot binaries
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temp_dir=$(as_nobody mktemp -d)
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# Install latest boot binaries from raspberry/firmware github
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as_nobody wget -q -O "${temp_dir}/bootcode.bin" "${FIRMWARE_URL}/bootcode.bin"
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as_nobody wget -q -O "${temp_dir}/fixup.dat" "${FIRMWARE_URL}/fixup.dat"
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as_nobody wget -q -O "${temp_dir}/fixup_cd.dat" "${FIRMWARE_URL}/fixup_cd.dat"
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as_nobody wget -q -O "${temp_dir}/fixup_x.dat" "${FIRMWARE_URL}/fixup_x.dat"
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as_nobody wget -q -O "${temp_dir}/start.elf" "${FIRMWARE_URL}/start.elf"
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as_nobody wget -q -O "${temp_dir}/start_cd.elf" "${FIRMWARE_URL}/start_cd.elf"
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as_nobody wget -q -O "${temp_dir}/start_x.elf" "${FIRMWARE_URL}/start_x.elf"
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# Move downloaded boot binaries
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mv "${temp_dir}/"* "${BOOT_DIR}/"
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# Remove temporary directory for boot binaries
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rm -fr "${temp_dir}"
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# Set permissions of the boot binaries
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chown -R root:root "${BOOT_DIR}"
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chmod -R 600 "${BOOT_DIR}"
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fi
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fi
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# Setup firmware boot cmdline
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if [ "$ENABLE_SPLITFS" = true ] ; then
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CMDLINE="dwc_otg.lpm_enable=0 root=/dev/sda1 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait console=tty1"
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else
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CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait console=tty1"
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fi
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# Add encrypted root partition to cmdline.txt
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if [ "$ENABLE_CRYPTFS" = true ] ; then
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if [ "$ENABLE_SPLITFS" = true ] ; then
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CMDLINE=$(echo "${CMDLINE}" | sed "s/sda1/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/sda1:${CRYPTFS_MAPPING}/")
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else
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CMDLINE=$(echo "${CMDLINE}" | sed "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/mmcblk0p2:${CRYPTFS_MAPPING}/")
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fi
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fi
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# Add serial console support
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if [ "$ENABLE_CONSOLE" = true ] ; then
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CMDLINE="${CMDLINE} console=ttyAMA0,115200 kgdboc=ttyAMA0,115200"
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fi
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# Remove IPv6 networking support
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if [ "$ENABLE_IPV6" = false ] ; then
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CMDLINE="${CMDLINE} ipv6.disable=1"
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fi
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# Automatically assign predictable network interface names
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if [ "$ENABLE_IFNAMES" = false ] ; then
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CMDLINE="${CMDLINE} net.ifnames=0"
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else
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CMDLINE="${CMDLINE} net.ifnames=1"
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fi
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# Set init to systemd if required by Debian release
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if [ "$RELEASE" = "stretch" ] || [ "$RELEASE" = "buster" ] ; then
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CMDLINE="${CMDLINE} init=/bin/systemd"
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fi
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# Install firmware boot cmdline
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echo "${CMDLINE}" > "${BOOT_DIR}/cmdline.txt"
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# Install firmware config
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install_readonly files/boot/config.txt "${BOOT_DIR}/config.txt"
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# Setup minimal GPU memory allocation size: 16MB (no X)
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if [ "$ENABLE_MINGPU" = true ] ; then
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echo "gpu_mem=16" >> "${BOOT_DIR}/config.txt"
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fi
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# Setup boot with initramfs
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if [ "$ENABLE_INITRAMFS" = true ] ; then
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echo "initramfs initramfs-${KERNEL_VERSION} followkernel" >> "${BOOT_DIR}/config.txt"
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fi
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# Disable RPi3 Bluetooth and restore ttyAMA0 serial device
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if [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; then
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if [ "$ENABLE_CONSOLE" = true ] && [ "$ENABLE_UBOOT" = false ] ; then
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echo "dtoverlay=pi3-disable-bt" >> "${BOOT_DIR}/config.txt"
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echo "enable_uart=1" >> "${BOOT_DIR}/config.txt"
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fi
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fi
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# Create firmware configuration and cmdline symlinks
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ln -sf firmware/config.txt "${R}/boot/config.txt"
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ln -sf firmware/cmdline.txt "${R}/boot/cmdline.txt"
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# Install and setup kernel modules to load at boot
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mkdir -p "${R}/lib/modules-load.d/"
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install_readonly files/modules/rpi2.conf "${R}/lib/modules-load.d/rpi2.conf"
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# Load hardware random module at boot
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if [ "$ENABLE_HWRANDOM" = true ] && [ "$BUILD_KERNEL" = false ] ; then
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sed -i "s/^# bcm2708_rng/bcm2708_rng/" "${R}/lib/modules-load.d/rpi2.conf"
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fi
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# Load sound module at boot
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if [ "$ENABLE_SOUND" = true ] ; then
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sed -i "s/^# snd_bcm2835/snd_bcm2835/" "${R}/lib/modules-load.d/rpi2.conf"
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else
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echo "dtparam=audio=off" >> "${BOOT_DIR}/config.txt"
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fi
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# Enable I2C interface
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if [ "$ENABLE_I2C" = true ] ; then
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echo "dtparam=i2c_arm=on" >> "${BOOT_DIR}/config.txt"
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sed -i "s/^# i2c-bcm2708/i2c-bcm2708/" "${R}/lib/modules-load.d/rpi2.conf"
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sed -i "s/^# i2c-dev/i2c-dev/" "${R}/lib/modules-load.d/rpi2.conf"
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fi
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# Enable SPI interface
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if [ "$ENABLE_SPI" = true ] ; then
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echo "dtparam=spi=on" >> "${BOOT_DIR}/config.txt"
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echo "spi-bcm2708" >> "${R}/lib/modules-load.d/rpi2.conf"
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if [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ]; then
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sed -i "s/spi-bcm2708/spi-bcm2835/" "${R}/lib/modules-load.d/rpi2.conf"
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fi
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fi
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# Disable RPi2/3 under-voltage warnings
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if [ -n "$DISABLE_UNDERVOLT_WARNINGS" ] ; then
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echo "avoid_warnings=${DISABLE_UNDERVOLT_WARNINGS}" >> "${BOOT_DIR}/config.txt"
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fi
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# Install kernel modules blacklist
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mkdir -p "${ETC_DIR}/modprobe.d/"
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install_readonly files/modules/raspi-blacklist.conf "${ETC_DIR}/modprobe.d/raspi-blacklist.conf"
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# Install sysctl.d configuration files
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install_readonly files/sysctl.d/81-rpi-vm.conf "${ETC_DIR}/sysctl.d/81-rpi-vm.conf"
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