+sub
+update_wifi_firmware_if_necessary
+{
+ return unless -f $firmware_tarball;
+
+ if (-f $firmware_manifest) {
+ system("sha256sum -c $firmware_manifest --quiet");
+ return if $? == 0;
+ }
+
+ system("sha256sum $firmware_tarball > $firmware_manifest");
+ system("tar -C /lib/firmware/ -xf $firmware_tarball");
+
+ system('rmmod brcmfmac');
+ system('rmmod brcmutil');
+ sleep(1);
+ system('modprobe brcmfmac');
+ sleep(1);
+ system('rmmod brcmfmac');
+ sleep(1);
+ system('modprobe brcmfmac');
+}
+