restart bthal on wake, allow user defined module reprobe

device.mk

@@ -73,6 +73,8 @@ endif
 PRODUCT_COPY_FILES := \
     $(if $(wildcard $(PRODUCT_DIR)init.rc),$(PRODUCT_DIR)init.rc:root/init.rc) \
     $(if $(wildcard $(PRODUCT_DIR)init.sh),$(PRODUCT_DIR),$(LOCAL_PATH)/)init.sh:system/etc/init.sh \
+    $(if $(wildcard $(PRODUCT_DIR)pre_sleep.sh),$(PRODUCT_DIR),$(LOCAL_PATH)/)pre_sleep.sh:system/etc/pre_sleep.sh \
+    $(if $(wildcard $(PRODUCT_DIR)post_sleep.sh),$(PRODUCT_DIR),$(LOCAL_PATH)/)post_sleep.sh:system/etc/post_sleep.sh \
     $(if $(wildcard $(PRODUCT_DIR)modules.blocklist),$(PRODUCT_DIR),$(LOCAL_PATH)/)modules.blocklist:system/etc/modules.blocklist \
     $(if $(wildcard $(PRODUCT_DIR)modules.options),$(PRODUCT_DIR),$(LOCAL_PATH)/)modules.options:system/etc/modules.options \
     $(if $(wildcard $(PRODUCT_DIR)fstab.$(TARGET_PRODUCT)),$(PRODUCT_DIR)fstab.$(TARGET_PRODUCT),$(LOCAL_PATH)/fstab.x86):root/fstab.$(TARGET_PRODUCT) \

init.sh

@@ -216,8 +216,10 @@ function init_hal_bluetooth()
 
 	if [ "$BTLINUX_HAL" = "1" ]; then
 		start btlinux-1.1
+		set_property "ro.bliss.bthal" "btlinux"
 	else
 		start vendor.bluetooth-1-1
+		set_property "ro.bliss.bthal" "celadon"
 	fi
 }
 

post_sleep.sh

@@ -0,0 +1,99 @@
+# called from modified suspend hal
+
+# prepare env
+DMIPATH=/sys/class/dmi/id
+export BOARD=$(cat $DMIPATH/board_name)
+export PRODUCT=$(cat $DMIPATH/product_name)
+export VENDOR=$(cat $DMIPATH/sys_vendor)
+export UEVENT=$(cat $DMIPATH/uevent)
+
+function reprobe_module_if_loaded()
+{
+	module=$1
+	for modname in $(lsmod | awk '{print $1}')
+	do
+		if [ "$module" == "$modname" ]
+		then
+			modprobe -rv $module
+			modprobe -v $module
+			return
+		fi
+	done
+	echo module $module not loaded, not reprobing
+}
+
+# prep the prebaked list here, if there are known devices that definitely needs this work-around
+MODULE_RELOAD_LIST=""
+# set RESTART_WIFI to true if a wifi module is going to be reloaded, note that users will have to manually turn on wifi again after a wificond restart
+RESTART_WIFI=false
+
+### EXAMPLE:
+### if [ "$BOARD" == "xxx" ]
+### then
+###   MODULE_RELOAD_LIST="$MODULE_RELOAD_LIST iwlwifi"
+###   RESTART_WIFI=true
+### fi
+
+# note that btusb is unloaded in pre_sleep.sh, since it takes more than 10+ seconds to unload btusb right after wake
+# ie. do not put btusb into the reload list
+
+# users can use this to flag wificond restart
+USER_RESTART_WIFI_FLAG=/data/etc/wake_reload_wifi
+if [ -e $USER_RESTART_WIFI_FLAG ]
+then
+	RESTART_WIFI=true
+fi
+
+if $RESTART_WIFI
+then
+	setprop ctl.stop wificond
+fi
+
+# perform module reprobe
+MODULE_RELOAD_LOG=/data/wake_module_reload_log
+rm -f $MODULE_RELOAD_LOG
+if [ -n "$MODULE_RELOAD_LIST" ]
+then
+	for m in $MODULE_RELOAD_LIST
+	do
+		reprobe_module_if_loaded $m 2>&1 | cat >> $MODULE_RELOAD_LOG
+	done
+fi
+
+# let users define a list of modules to reload on wake
+USER_MODULE_RELOAD_LIST=/data/etc/wake_module_reload_list
+if [ -e $USER_MODULE_RELOAD_LIST ]
+then
+	for m in $(cat $USER_MODULE_RELOAD_LIST)
+	do
+		reprobe_module_if_loaded $m 2>&1 | cat >> $MODULE_RELOAD_LOG
+	done
+fi
+
+# start services again
+if $RESTART_WIFI
+then
+	setprop ctl.start wificond
+fi
+
+# probe btusb since it was unloaded in pre_sleep.sh
+modprobe btusb
+
+# bthal and com.android.bluetooth were disabled in pre_sleep.sh
+bthal=$(getprop ro.bliss.bthal)
+case $bthal in
+	"btlinux")
+		setprop ctl.start btlinux-1.1
+		;;
+	"celadon")
+		setprop ctl.start vendor.bluetooth-1-1
+		;;
+esac
+pm enable com.android.bluetooth
+
+# allow user defined actions
+USER_SCRIPT=/data/etc/post_sleep.sh
+if [ -e $USER_SCRIPT ]
+then
+	/system/bin/sh $USER_SCRIPT
+fi

pre_sleep.sh

@@ -0,0 +1,32 @@
+# called from modified suspend hal
+
+# prepare env
+DMIPATH=/sys/class/dmi/id
+export BOARD=$(cat $DMIPATH/board_name)
+export PRODUCT=$(cat $DMIPATH/product_name)
+export VENDOR=$(cat $DMIPATH/sys_vendor)
+export UEVENT=$(cat $DMIPATH/uevent)
+
+# put prebaked actions here
+
+# stop com.android.bluetooth
+pm disable com.android.bluetooth
+bt_pid=$(pidof com.android.bluetooth)
+if [ -n "$bt_pid" ]
+then
+	kill -KILL $bt_pid
+fi
+
+# stop bluetooth hal
+setprop ctl.stop vendor.bluetooth-1-1
+setprop ctl.stop btlinux-1.1
+
+# unload btusb here, because unloading could take 10+ seconds right after wake
+modprobe -r btusb
+
+# allow user defined actions
+USER_SCRIPT=/data/etc/pre_sleep.sh
+if [ -e $USER_SCRIPT ]
+then
+	/system/bin/sh $USER_SCRIPT
+fi