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populate firmware partition via systemd service

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Travis Staton 2023-05-24 09:33:32 -04:00
parent 3ca8c6898a
commit a1b4cadb53
2 changed files with 93 additions and 39 deletions
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117
rpi/default.nix
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@ -4,43 +4,96 @@
{
imports = [ ../sd-image ./config.nix ./i2c.nix ];
# On activation install u-boot, Raspberry Pi firmware, and our
# generated config.txt
system.activationScripts.raspberrypi = {
text = ''
shopt -s nullglob
systemd.services = {
"raspberry-pi-firmware-migrate" = {
description = "update the firmware partition";
wantedBy = [ "multi-user.target" ];
serviceConfig = let firmware-path = "/boot/firmware";
in {
Type = "oneshot";
MountImages =
"/dev/disk/by-label/${config.sdImage.firmwarePartitionName}:${firmware-path}";
StateDirectory = "raspberrypi-firmware";
ExecStart = pkgs.writeShellScript "migrate-rpi-firmware" ''
shopt -s nullglob
TARGET_FIRMWARE_DIR="/boot/firmware"
TARGET_OVERLAYS_DIR="$TARGET_FIRMWARE_DIR/overlays"
TMPFILE="$TARGET_FIRMWARE_DIR/tmp"
UBOOT="${pkgs.uboot_rpi_arm64}/u-boot.bin"
SRC_FIRMWARE_DIR="${pkgs.raspberrypifw}/share/raspberrypi/boot"
STARTFILES=("$SRC_FIRMWARE_DIR"/start*.elf)
DTBS=("$SRC_FIRMWARE_DIR"/*.dtb)
BOOTCODE="$SRC_FIRMWARE_DIR/bootcode.bin"
FIXUPS=("$SRC_FIRMWARE_DIR"/fixup*.dat)
SRC_OVERLAYS_DIR="$SRC_FIRMWARE_DIR/overlays"
SRC_OVERLAYS=("$SRC_OVERLAYS_DIR"/*)
CONFIG="${config.hardware.raspberry-pi.config-output}"
TARGET_FIRMWARE_DIR="${firmware-path}"
TARGET_OVERLAYS_DIR="$TARGET_FIRMWARE_DIR/overlays"
TMPFILE="$TARGET_FIRMWARE_DIR/tmp"
UBOOT="${pkgs.uboot_rpi_arm64}/u-boot.bin"
SRC_FIRMWARE_DIR="${pkgs.raspberrypifw}/share/raspberrypi/boot"
STARTFILES=("$SRC_FIRMWARE_DIR"/start*.elf)
DTBS=("$SRC_FIRMWARE_DIR"/*.dtb)
BOOTCODE="$SRC_FIRMWARE_DIR/bootcode.bin"
FIXUPS=("$SRC_FIRMWARE_DIR"/fixup*.dat)
SRC_OVERLAYS_DIR="$SRC_FIRMWARE_DIR/overlays"
SRC_OVERLAYS=("$SRC_OVERLAYS_DIR"/*)
CONFIG="${config.hardware.raspberry-pi.config-output}"
cp "$UBOOT" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/u-boot-rpi-arm64.bin"
migrate_uboot() {
echo "migrating uboot"
touch "$STATE_DIRECTORY/uboot-migration-in-progress"
cp "$UBOOT" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/u-boot-rpi-arm64.bin"
echo "${
builtins.toString pkgs.uboot_rpi_arm64
}" > "$STATE_DIRECTORY/uboot-version"
rm "$STATE_DIRECTORY/uboot-migration-in-progress"
}
cp "$CONFIG" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/config.txt"
migrate_config() {
echo "migrating config.txt"
touch "$STATE_DIRECTORY/config-migration-in-progress"
cp "$CONFIG" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/config.txt"
echo "${config.hardware.raspberry-pi.config-output}" > "$STATE_DIRECTORY/config-version"
rm "$STATE_DIRECTORY/config-migration-in-progress"
}
for SRC in "''${STARTFILES[@]}" "''${DTBS[@]}" "$BOOTCODE" "''${FIXUPS[@]}"
do
cp "$SRC" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/$(basename "$SRC")"
done
migrate_firmware() {
echo "migrating raspberrypi firmware"
touch "$STATE_DIRECTORY/firmware-migration-in-progress"
for SRC in "''${STARTFILES[@]}" "''${DTBS[@]}" "$BOOTCODE" "''${FIXUPS[@]}"
do
cp "$SRC" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_FIRMWARE_DIR/$(basename "$SRC")"
done
for SRC in "''${SRC_OVERLAYS[@]}"
do
cp "$SRC" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_OVERLAYS_DIR/$(basename "$SRC")"
done
'';
if [[ ! -d "$TARGET_OVERLAYS_DIR" ]]; then
mkdir "$TARGET_OVERLAYS_DIR"
fi
for SRC in "''${SRC_OVERLAYS[@]}"
do
cp "$SRC" "$TMPFILE"
mv -T "$TMPFILE" "$TARGET_OVERLAYS_DIR/$(basename "$SRC")"
done
echo "${
builtins.toString pkgs.raspberrypifw
}" > "$STATE_DIRECTORY/firmware-version"
rm "$STATE_DIRECTORY/firmware-migration-in-progress"
}
if [[ -f "$STATE_DIRECTORY/uboot-migration-in-progress" || ! -f "$STATE_DIRECTORY/uboot-version" || $(< "$STATE_DIRECTORY/uboot-version") != ${
builtins.toString pkgs.uboot_rpi_arm64
} ]]; then
migrate_uboot
fi
if [[ -f "$STATE_DIRECTORY/config-migration-in-progress" || ! -f "$STATE_DIRECTORY/config-version" || $(< "$STATE_DIRECTORY/config-version") != ${
builtins.toString config.hardware.raspberry-pi.config-output
} ]]; then
migrate_config
fi
if [[ -f "$STATE_DIRECTORY/firmware-migration-in-progress" || ! -f "$STATE_DIRECTORY/firmware-version" || $(< "$STATE_DIRECTORY/firmware-version") != ${
builtins.toString pkgs.raspberrypifw
} ]]; then
migrate_firmware
fi
'';
};
};
};
# Default config.txt on Raspberry Pi OS: