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#!/bin/bash
# This script will use "list-required-firmware" to scan the kernel source repository
# in combination with its configuration file which drivers are compiled. Some of those
# drivers require proprietary firmware.
#
# All selected drivers are then precomfiled "make drivers/foo/bar.i" and we grep for
# the magic word "UNIQUE_ID_firmware" which identifies firmware files.
CWD=$(pwd)
LINUX_SRC="linux"
LINUX_FIRMWARE="linux-firmware"
KERNEL_VAR_FILE=${CWD}/kernel-vars
# Some firmware files might not be easy to extract (e.g. Intel iwlwifi drivers)
# thus we simply ammend them "manually"
ADD_FW_FILES="iwlwifi*"
if [ ! -d ${LINUX_SRC} ]; then
echo "Kernel source missing"
exit 1
fi
if [ ! -d ${LINUX_FIRMWARE} ]; then
echo "Linux firmware repository missing"
exit 1
fi
. ${KERNEL_VAR_FILE}
result=()
# Retrieve firmware blobs from source files
cd ${LINUX_SRC}
FW_FILES=$(../list-required-firmware.py -c ../x86_64_vyos_defconfig -s drivers/net 2>/dev/null)
# Debian package will use the descriptive Git commit as version
GIT_COMMIT=$(cd ${CWD}/${LINUX_FIRMWARE}; git describe --always)
VYOS_FIRMWARE_NAME="vyos-linux-firmware"
VYOS_FIRMWARE_DIR="${CWD}/${VYOS_FIRMWARE_NAME}_${GIT_COMMIT}-0_all"
if [ -d ${VYOS_FIRMWARE_DIR} ]; then
# remove Debian package folder and deb file from previous runs
rm -rf ${VYOS_FIRMWARE_DIR}*
fi
mkdir -p ${VYOS_FIRMWARE_DIR}
# Copy firmware file from linux firmware repository into
# assembly folder for the vyos-firmware package
SED_REPLACE="s@${CWD}/${LINUX_FIRMWARE}/@@"
for FW_PATH in ${FW_FILES}; do
FW_FILE=$(basename $FW_PATH)
res=()
for tmp in $(find ${CWD}/linux-firmware -type f -name ${FW_FILE} | sed -e ${SED_REPLACE})
do
res+=( "$tmp" )
done
for FILE in ${res[@]}; do
FW_DIR="${VYOS_FIRMWARE_DIR}/lib/firmware/$(dirname ${FILE})"
mkdir -p ${FW_DIR}
echo "I: install firmware: ${FILE}"
cp ${CWD}/linux-firmware/${FILE} ${FW_DIR}
done
done
# Install additional firmware files that could not be autodiscovered
for FW in ${ADD_FW_FILES}
do
FW_DIR="${VYOS_FIRMWARE_DIR}/lib/firmware/$(dirname ${FW})"
mkdir -p ${FW_DIR}
echo "I: install firmware: ${FW}"
cp ${CWD}/linux-firmware/${FW} ${FW_DIR}
done
# Describe Debian package
mkdir ${VYOS_FIRMWARE_DIR}/DEBIAN
cat << EOF >${VYOS_FIRMWARE_DIR}/DEBIAN/control
Package: ${VYOS_FIRMWARE_NAME}
Version: ${GIT_COMMIT}
Section: kernel
Priority: extra
Architecture: all
Maintainer: VyOS Package Maintainers <maintainers@vyos.net>
Description: Firmware blobs for use with the Linux kernel
EOF
# Build Debian package
fakeroot dpkg-deb --build ${VYOS_FIRMWARE_DIR}
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