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- #! /bin/sh
- #
- # Laptop mode tools module, called from /usr/sbin/laptop_mode.
- # Configuration in /etc/laptop-mode/conf.d/wireless-ipw-power.conf.
- #
- # PURPOSE: power saving for the Intel 3945 and 4965 adapters when using the
- # iwlwifi drivers.
- #
- # This script relies upon the name of the driver.
- #
-
- #
- # Find all the wireless devices using the supplied driver names.
- # Place the interface names on the list WIFI_IFNAMES.
- #
- findWifiIfsByDriver () {
- local DEVICE;
- local LINK_TARGET;
-
- for DEVICE in /sys/class/net/*; do
- if [ -d $DEVICE/wireless -a -h $DEVICE/device/driver ]; then
- # See if the driver for $DEVICE matches the supplied one by checking the link to
- # the driver.
- LINK_TARGET=`readlink $DEVICE/device/driver`
- LINK_TARGET=${LINK_TARGET##*/}
-
- if [ "$LINK_TARGET" = "$1" ] ; then
- # add the interface name to the list
- WIFI_IFNAMES="$WIFI_IFNAMES ${DEVICE##*/}"
- fi
- fi
- done
- }
-
- if [ x$CONTROL_IWL_POWER = x1 ] ; then
- $LM_VERBOSE && echo "Setting power levels for iwlwifi wireless interfaces." >> $OUTPUT
-
- # Provide defaults for config file settings
- [ "$IWL_AC_POWER" ] || IWL_AC_POWER=6
- [ "$IWL_BATT_POWER" ] || IWL_BATT_POWER=7
-
- WIFI_IFNAMES=""
- [ -d /sys/module/iwl3945 ] && findWifiIfsByDriver iwl3945
- [ -d /sys/module/iwl4965 ] && findWifiIfsByDriver iwl4965
- [ -d /sys/module/iwlagn ] && findWifiIfsByDriver iwlagn
- for IF in $WIFI_IFNAMES ; do
- if [ $ON_AC -eq 1 ] ; then
- $LM_VERBOSE && echo "On AC power: setting power level for $IF to $IWL_AC_POWER." >> $OUTPUT
- if ( ! echo $IWL_AC_POWER > /sys/class/net/$IF/device/power_level ) ; then
- echo "Failed." >> $OUTPUT
- fi
- else
- $LM_VERBOSE && echo "On battery: setting power level for $IF to $IWL_BATT_POWER." >> $OUTPUT
- if ( ! echo $IWL_BATT_POWER > /sys/class/net/$IF/device/power_level ) ; then
- echo "Failed." >> $OUTPUT
- fi
- fi
- done
- else
- $LM_VERBOSE && echo "Intel IWL Wireless power setting is disabled." >> $OUTPUT
- fi
-