systemd-stable/extras/firmware/firmware.sh

#!/bin/sh -e

FIRMWARE_DIRS="/lib/firmware /usr/local/lib/firmware"

err() {
    echo "$@" >&2
    if type logger >/dev/null; then
	logger -t "${0##*/}[$$]" "$@"
    fi
}

if [ ! -e /sys$DEVPATH/loading ]; then
    err "udev firmware loader misses sysfs directory"
    exit 1
fi

for DIR in $FIRMWARE_DIRS; do
    [ -e "$DIR/$FIRMWARE" ] || continue
    echo 1 > /sys$DEVPATH/loading
    cat "$DIR/$FIRMWARE" > /sys$DEVPATH/data
    echo 0 > /sys$DEVPATH/loading
    exit 0
done

echo -1 > /sys$DEVPATH/loading
err "Cannot find  firmware file '$FIRMWARE'"
exit 1