bruh

modules/nixos/hardware/raspberry-pi/firmware-builder.sh

@@ -0,0 +1,92 @@
+#! @bash@/bin/sh -e
+
+shopt -s nullglob
+
+export PATH=/empty:@path@
+
+usage() {
+    echo "usage: $0 -c <path-to-default-configuration> [-d <firmware-dir>] [-r]" >&2
+    exit 1
+}
+
+default=                # Default configuration
+target=/boot/firmware   # Firmware target directory
+
+while getopts "c:d:r" opt; do
+    case "$opt" in
+        c) default="$OPTARG" ;;
+        d) target="$OPTARG" ;;
+        r) useVendorDeviceTree=1 ;;
+        \?) usage ;;
+    esac
+done
+
+# Copy a file from the Nix store to $target.
+declare -A filesCopied
+
+copyForced() {
+    local src="$1"
+    local dst="$2"
+    cp $src $dst.tmp
+    mv $dst.tmp $dst
+}
+
+# Add the firmware files
+# fwdir=@firmware@/share/raspberrypi/boot/
+SRC_FIRMWARE_DIR=@firmware@/share/raspberrypi/boot
+dtb_path=$SRC_FIRMWARE_DIR
+
+echo "copying firmware..."
+
+# Device Tree
+
+if [ -n "$useVendorDeviceTree" ]; then
+    echo -n "using vendor firmware from "
+    dtb_path=$SRC_FIRMWARE_DIR
+else
+    echo -n "using default generation's kernel device tree binaries: "
+    dtb_path=$(readlink -f $default/dtbs)
+fi
+echo $dtb_path
+
+DTBS=("$dtb_path"/*.dtb)
+for dtb in "${DTBS[@]}"; do
+# for dtb in $dtb_path/broadcom/*.dtb; do
+    dst="$target/$(basename $dtb)"
+    copyForced $dtb "$dst"
+    filesCopied[$dst]=1
+done
+
+SRC_OVERLAYS_DIR="$dtb_path/overlays"
+SRC_OVERLAYS=("$SRC_OVERLAYS_DIR"/*)
+mkdir -p $target/overlays
+for ovr in "${SRC_OVERLAYS[@]}"; do
+# for ovr in $dtb_path/overlays/*; do
+    dst="$target/overlays/$(basename $ovr)"
+    copyForced $ovr "$dst"
+    filesCopied[$dst]=1
+done
+
+# remove obsolete device tree files
+for fn in $target/*.dtb $target/overlays/*; do
+    if ! test "${filesCopied[$fn]}" = 1; then
+        rm -vf -- "$fn"
+    fi
+done
+
+
+# Boot code
+
+STARTFILES=("$SRC_FIRMWARE_DIR"/start*.elf)
+BOOTCODE="$SRC_FIRMWARE_DIR/bootcode.bin"
+FIXUPS=("$SRC_FIRMWARE_DIR"/fixup*.dat)
+for SRC in "${STARTFILES[@]}" "$BOOTCODE" "${FIXUPS[@]}"; do
+    dst="$target/$(basename $SRC)"
+    copyForced "$SRC" "$dst"
+done
+
+echo "copying config.txt..."
+# Add the config.txt
+copyForced @configTxt@ $target/config.txt
+
+echo "raspberry pi firmware installed"