op_power: make sure powersave is off when turning on display
[openpandora.oe.git] / recipes / pandora-system / pandora-scripts / op_power.sh
index b2acf74..35e01cf 100644 (file)
@@ -1,6 +1,10 @@
 #!/bin/bash
 
-( test -e /tmp/op_power.lock && exit 2 ) || touch "/tmp/op_power.lock"
+. /usr/pandora/scripts/op_paths.sh
+
+# XXX: better use lockfile (or something), but it's not in current firmware
+test -e /tmp/op_power.lock && exit 2
+touch /tmp/op_power.lock
 
 debug(){
        return 1 # 0 when debugging, 1 when not
@@ -18,64 +22,229 @@ fi
 
 debug && echo "powerstate=$powerstate"
 
-lowPowerOn(){ #switch from normal to lowpower mode
-       cat /proc/pandora/cpu_mhz_max > /tmp/oldspeed
-       cat /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/brightness > /tmp/oldbright
-       pidlist=$(pstree -lpA | grep pnd_run.sh | sed -ne 's/.*(\([0-9]\+\))/\1/p')
-       for PID in $pidlist
-       do
-               kill -19 $PID #send SIGSTOP
-       done
-       test -f /tmp/hcistate && rm /tmp/hcistate
+suspend_net() {
        hcistate=$(hciconfig hci0 | grep DOWN)
        if [ $hcistate ]; then
                echo "down" > /tmp/hcistate
        else
+               echo "up" > /tmp/hcistate
                hciconfig hci0 down
        fi
-       test -f /tmp/wlstate && rm /tmp/wlstate
        wlstate=$(lsmod | grep -m1 wl1251)
        if [ -z "$wlstate" ]; then
                echo "down" > /tmp/wlstate
        else
+               echo "up" > /tmp/wlstate
                ifconfig wlan0 down
-               rmmod board_omap3pandora_wifi wl1251_sdio wl1251
+               rmmod board_omap3pandora_wifi 2> /dev/null
+               rmmod wl1251_sdio wl1251
        fi
-       echo 0 > /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/brightness
-       echo 1 > /sys/devices/platform/omapfb/graphics/fb0/blank
-       echo 16 > /sys/class/leds/pandora\:\:power/brightness #dim power LED
-       /usr/pandora/scripts/op_cpuspeed.sh 125
 }
 
-lowPowerOff(){ # switch from lowpower to normal mode
-       oldspeed=$(cat /tmp/oldspeed)
-       /usr/pandora/scripts/op_cpuspeed.sh $oldspeed
-       oldbright=$(cat /tmp/oldbright)
-       maxbright=$(cat /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/max_brightness)
-       echo 0 > /sys/devices/platform/omapfb/graphics/fb0/blank
-       sleep 0.1s # looks cleaner, could flicker without
-       oldspeed=$(cat /tmp/oldspeed)
+resume_net() {
+       hcistate=$(cat /tmp/hcistate)
+       if [ "$hcistate" = "up" ]; then
+               hciconfig hci0 up pscan
+       fi
+       wlstate=$(cat /tmp/wlstate)
+       if [ "$wlstate" = "up" ]; then
+               /etc/init.d/wl1251-init start
+       fi
+       rm -f /tmp/hcistate /tmp/wlstate
+}
+
+display_on() {
+       echo 0 > /sys/class/graphics/fb0/blank
+
+       # only bother restoring brightness if it's 0
+       # (old kernel or user messed it up somehow)
+       brightness=$(cat $SYSFS_BACKLIGHT_BRIGHTNESS)
+       if [ $brightness -gt 0 ]; then
+               return 0
+       fi
+
+       maxbright=$(cat $SYSFS_BACKLIGHT/max_brightness)
+       oldbright=0
+       if [ -f /tmp/oldbright ]; then
+               oldbright=$(cat /tmp/oldbright)
+       fi
+       if [ $oldbright -eq 0 ]; then
+               oldbright=$(cat /etc/pandora/conf/brightness.state)
+       fi
        if [ $oldbright -ge 3 ] && [ $oldbright -le $maxbright ]; then 
                /usr/pandora/scripts/op_bright.sh $oldbright 
        else
                /usr/pandora/scripts/op_bright.sh $maxbright
        fi
-       hcistate=$(cat /tmp/hcistate)
-       if [ ! $hcistate ]; then
-               hciconfig hci0 up pscan
+}
+
+display_off() {
+       brightness=$(cat $SYSFS_BACKLIGHT_BRIGHTNESS)
+       if [ $brightness -gt 0 ]; then
+               echo $brightness > /tmp/oldbright
        fi
-       wlstate=$(cat /tmp/wlstate)
-       if [ -z "$wlstate" ]; then
-               /etc/init.d/wl1251-init start
+       kernel_major=`uname -r | cut -c 1`
+       if [ "$kernel_major" = "2" ]; then
+               echo 0 > $SYSFS_BACKLIGHT_BRIGHTNESS
        fi
+
+       echo 1 > /sys/class/graphics/fb0/blank
+}
+
+lowPowerOn(){ #switch from normal to lowpower mode
+       display_off
+
+       pidlist=$(pstree -lpA | grep pnd_run.sh | sed -ne 's/.*(\([0-9]\+\))/\1/p')
+       for PID in $pidlist
+       do
+               kill -STOP $PID
+       done
+
+       suspend_net
+
+       cat /proc/pandora/cpu_mhz_max > /tmp/oldspeed
+       /usr/pandora/scripts/op_cpuspeed.sh -n 125
+}
+
+lowPowerOff(){ # switch from lowpower to normal mode
+       oldspeed=$(cat /tmp/oldspeed)
+       /usr/pandora/scripts/op_cpuspeed.sh -n $oldspeed
+       rm -f /tmp/oldspeed
+
+       display_on
+       resume_net
+
        pidlist=$(pstree -lpA | grep pnd_run.sh | sed -ne 's/.*(\([0-9]\+\))/\1/p')
        for PID in $pidlist
        do
-               kill -18 $PID #send SIGCONT
+               kill -CONT $PID
        done
        echo 255 > /sys/class/leds/pandora\:\:power/brightness #power LED bright
 }
 
+display_on_with_checks() {
+       # after turning on the display, we don't want lowpower state
+       # (which could be active because of some races)
+       if [ "$powerstate" = "buttonlowpower" -o "$powerstate" = "lidlowpower" -o \
+            -e /tmp/oldspeed ]
+       then
+               lowPowerOff
+       else
+               display_on
+       fi
+}
+
+show_message() {
+       # TODO: check if desktop is visible; maybe use layer3?
+       xfceuser=$(ps u -C xfce4-session | tail -n1 | awk '{print $1}')
+       cmd="DISPLAY=:0.0 zenity --info --text \"$1\" --timeout 10"
+       su -c "$cmd" $xfceuser
+}
+
+suspend_real() {
+       delay=0
+
+       if ! [ -e /sys/power/state ]; then
+               # no kernel suspend support
+               return 1
+       fi
+
+       current_now="$(cat /sys/class/power_supply/bq27500-0/current_now)"
+       if [ $current_now -gt 0 ]; then 
+               return 1 
+               #don't suspend while unit is charging
+       fi
+
+       # can't suspend while SGX is in use due to bugs
+       # (prevents low power states and potential lockup)
+       if lsof -t /dev/pvrsrvkm > /dev/null; then
+               return 1
+       fi
+
+       if ! grep -q 'mmc_core.removable=0' /proc/cmdline; then
+               # must unmount cards because they will be "ejected" on suspend
+               # (some filesystems may even deadlock if we don't do this due to bugs)
+               mounts="$(grep "/dev/mmcblk" /proc/mounts | awk '{print $1}' | xargs echo)"
+               for mnt in $mounts; do
+                       if ! umount $mnt; then
+                               show_message "Could not unmount $mnt, using partial suspend only"
+                               return 1
+                       fi
+               done
+               swaps="$(grep "/dev/mmcblk" /proc/swaps | awk '{print $1}' | xargs echo)"
+               for swp in $swaps; do
+                       if ! swapoff $swp; then
+                               show_message "Could not unmount $swp, using partial suspend only"
+                               return 1
+                       fi
+               done
+       else
+               if [ ! -e /etc/pandora/suspend-warned ]; then
+                       show_message "Pandora will now suspend.\n\n\
+Please do not remove SD cards while pandora is suspended, doing so will corrupt them."
+                       touch /etc/pandora/suspend-warned
+               fi
+       fi
+
+       # FIXME: fix the kernel and get rid of this
+       suspend_net
+
+       # get rid of modules that prevent suspend due to bugs
+       modules="$(lsmod | awk '{print $1}' | xargs echo)"
+       blacklist="g_zero g_audio g_ether g_serial g_midi gadgetfs g_file_storage
+               g_mass_storage g_printer g_cdc g_multi g_hid g_dbgp g_nokia g_webcam g_ncm g_acm_ms
+               ehci_hcd bridgedriver"
+       restore_list=""
+       for mod in $modules; do
+               if echo $blacklist | grep -q "\<$mod\>"; then
+                       restore_list="$restore_list $mod"
+                       rmmod $mod
+                       delay=1 # enough?
+               fi
+       done
+
+       sleep $delay
+       sync
+       echo mem > /sys/power/state
+
+       # if we are here, either we already resumed or the suspend failed
+       if [ -n "$restore_list" ]; then
+               modprobe $restore_list
+       fi
+
+       display_on
+       resume_net
+       echo 255 > /sys/class/leds/pandora\:\:power/brightness
+
+       # wait here a bit to prevent this script from running again (keep op_power.lock)
+       # in case user did resume using the power switch.
+       sleep 2
+
+       return 0
+}
+
+suspend_() {
+       # dim power LED
+       echo 16 > /sys/class/leds/pandora\:\:power/brightness
+
+       if suspend_real; then
+               # resumed already
+               powerstate="on"
+       else
+               lowPowerOn
+       fi
+}
+
+resume() {
+       if [ "$powerstate" = "on" ]; then
+               # nothing to do
+               echo "resume called unexpectedly" >&2
+       else
+               lowPowerOff
+       fi
+}
+
 shutdown(){ # warns the user and shuts the pandora down
        xfceuser=$(ps u -C xfce4-session | tail -n1 | awk '{print $1}')
        time=5
@@ -95,41 +264,17 @@ shutdown(){ # warns the user and shuts the pandora down
        fi
 }
 
-displayOn(){ # turns the display on
-       #echo 0 > /sys/devices/platform/omapfb/graphics/fb0/blank
-       #sleep 0.1s # looks cleaner, could flicker without
-       maxbright=$(cat /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/max_brightness)
-       oldbright=0
-       if [ -f /tmp/oldbright ]; then
-               oldbright=$(cat /tmp/oldbright)
-       fi
-       if [ $oldbright -eq 0 ]; then
-               oldbright=$(cat /etc/pandora/conf/brightness.state)
-       fi
-       if [ $oldbright -ge 3 ] && [ $oldbright -le $maxbright ]; then 
-               /usr/pandora/scripts/op_bright.sh $oldbright 
-       else
-               /usr/pandora/scripts/op_bright.sh $maxbright
-       fi
-}
-
-displayOff(){ # turns the display off
-       brightness=$(cat /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/brightness)
-       if [ $brightness -gt 0 ]; then
-               echo $brightness > /tmp/oldbright
-       fi
-       echo 0 > /sys/devices/platform/twl4030-pwm0-bl/backlight/twl4030-pwm0-bl/brightness
-       #echo 1 > /sys/devices/platform/omapfb/graphics/fb0/blank
-}
-
 if [[ "$2" == "" ]]; then
        if [[ "$1" -le 2 ]]; then # power button was pressed 1-2sec, "suspend"
                if [[ "$powerstate" == "buttonlowpower" ]]; then
-                       (debug && echo "lowPowerOff") || lowPowerOff
+                       (debug && echo "resume") || resume
                        powerstate="on"
                elif [[ "$powerstate" == "on" ]]; then
-                       (debug && echo "lowPowerOn") || lowPowerOn
                        powerstate="buttonlowpower"
+                       (debug && echo "suspend") || suspend_
+               elif [[ "$powerstate" == "liddisplayoff" ]]; then
+                       powerstate="buttonlowpower"
+                       (debug && echo "suspend") || suspend_
                fi
        elif [[ "$1" -ge 3 ]]; then # power button was pressed 3 sec or longer, shutdown
                if [[ "$powerstate" == "on" ]]; then
@@ -141,11 +286,11 @@ elif [[ "$2" == "lid" ]]; then
                if [[ "$powerstate" == lid* ]]; then
                        case "$lidconfig" in
                                "lowpower")
-                                       (debug && echo "lowPowerOff") || lowPowerOff
+                                       (debug && echo "resume") || resume
                                        powerstate="on"
                                ;;
                                *)
-                                       (debug && echo "displayOn") || displayOn
+                                       (debug && echo "display_on") || display_on_with_checks
                                        powerstate="on"
                                ;;
                        esac
@@ -157,18 +302,30 @@ elif [[ "$2" == "lid" ]]; then
                                        (debug && echo "shutdown") || shutdown
                                ;;
                                "lowpower")
-                                       (debug && echo "lowPowerOn") || lowPowerOn
                                        powerstate="lidlowpower"
+                                       (debug && echo "suspend") || suspend_
                                ;;
                                *)
-                                       (debug && echo "displayOff") || displayOff
+                                       (debug && echo "display_off") || display_off
                                        powerstate="liddisplayoff"
                                ;;
                        esac
                fi
        fi
- fi
+elif [[ "$2" == "screensaver" ]]; then
+       # warning: don't try to interact with X or do real suspend here -
+       # will cause various deadlocks
+       unset DISPLAY
+
+       if [[ "$1" == 0 ]]; then # deactivate screensaver
+               display_on_with_checks
+               powerstate="on"
+       elif [[ "$1" == 1 ]]; then # activate screensaver
+               display_off
+       fi
+fi
+
 debug && echo "powerstate=$powerstate"
 echo "$powerstate" > /tmp/powerstate
 
-
+rm -f /tmp/op_power.lock