/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Binder;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.SystemClock;
import android.os.UEventObserver;
import android.os.UserHandle;
import android.provider.Settings;
import android.util.Log;
import android.util.Slog;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
/**
* DockObserver monitors for a docking station.
*/
final class DockObserver extends SystemService {
private static final String TAG = "DockObserver";
private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
private static final int MSG_DOCK_STATE_CHANGED = 0;
private final PowerManager mPowerManager;
private final PowerManager.WakeLock mWakeLock;
private final Object mLock = new Object();
private boolean mSystemReady;
private int mActualDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mReportedDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
private boolean mUpdatesStopped;
private final boolean mAllowTheaterModeWakeFromDock;
public DockObserver(Context context) {
super(context);
mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
mAllowTheaterModeWakeFromDock = context.getResources().getBoolean(
com.android.internal.R.bool.config_allowTheaterModeWakeFromDock);
init(); // set initial status
mObserver.startObserving(DOCK_UEVENT_MATCH);
}
@Override
public void onStart() {
publishBinderService(TAG, new BinderService());
}
@Override
public void onBootPhase(int phase) {
if (phase == PHASE_ACTIVITY_MANAGER_READY) {
synchronized (mLock) {
mSystemReady = true;
// don't bother broadcasting undocked here
if (mReportedDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
updateLocked();
}
}
}
}
private void init() {
synchronized (mLock) {
try {
char[] buffer = new char[1024];
FileReader file = new FileReader(DOCK_STATE_PATH);
try {
int len = file.read(buffer, 0, 1024);
setActualDockStateLocked(Integer.parseInt((new String(buffer, 0, len)).trim()));
mPreviousDockState = mActualDockState;
} finally {
file.close();
}
} catch (FileNotFoundException e) {
Slog.w(TAG, "This kernel does not have dock station support");
} catch (Exception e) {
Slog.e(TAG, "" , e);
}
}
}
private void setActualDockStateLocked(int newState) {
mActualDockState = newState;
if (!mUpdatesStopped) {
setDockStateLocked(newState);
}
}
private void setDockStateLocked(int newState) {
if (newState != mReportedDockState) {
mReportedDockState = newState;
if (mSystemReady) {
// Wake up immediately when docked or undocked except in theater mode.
if (mAllowTheaterModeWakeFromDock
|| Settings.Global.getInt(getContext().getContentResolver(),
Settings.Global.THEATER_MODE_ON, 0) == 0) {
mPowerManager.wakeUp(SystemClock.uptimeMillis(),
"android.server:DOCK");
}
updateLocked();
}
}
}
private void updateLocked() {
mWakeLock.acquire();
mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED);
}
private void handleDockStateChange() {
synchronized (mLock) {
Slog.i(TAG, "Dock state changed from " + mPreviousDockState + " to "
+ mReportedDockState);
final int previousDockState = mPreviousDockState;
mPreviousDockState = mReportedDockState;
// Skip the dock intent if not yet provisioned.
final ContentResolver cr = getContext().getContentResolver();
if (Settings.Global.getInt(cr,
Settings.Global.DEVICE_PROVISIONED, 0) == 0) {
Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
return;
}
// Pack up the values and broadcast them to everyone
Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
intent.putExtra(Intent.EXTRA_DOCK_STATE, mReportedDockState);
// Play a sound to provide feedback to confirm dock connection.
// Particularly useful for flaky contact pins...
if (Settings.Global.getInt(cr,
Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1) {
String whichSound = null;
if (mReportedDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if ((previousDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(previousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(previousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_UNDOCK_SOUND;
} else if (previousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.Global.CAR_UNDOCK_SOUND;
}
} else {
if ((mReportedDockState == Intent.EXTRA_DOCK_STATE_DESK) ||
(mReportedDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) ||
(mReportedDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) {
whichSound = Settings.Global.DESK_DOCK_SOUND;
} else if (mReportedDockState == Intent.EXTRA_DOCK_STATE_CAR) {
whichSound = Settings.Global.CAR_DOCK_SOUND;
}
}
if (whichSound != null) {
final String soundPath = Settings.Global.getString(cr, whichSound);
if (soundPath != null) {
final Uri soundUri = Uri.parse("file://" + soundPath);
if (soundUri != null) {
final Ringtone sfx = RingtoneManager.getRingtone(
getContext(), soundUri);
if (sfx != null) {
sfx.setStreamType(AudioManager.STREAM_SYSTEM);
sfx.play();
}
}
}
}
}
// Send the dock event intent.
// There are many components in the system watching for this so as to
// adjust audio routing, screen orientation, etc.
getContext().sendStickyBroadcastAsUser(intent, UserHandle.ALL);
}
}
private final Handler mHandler = new Handler(true /*async*/) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_DOCK_STATE_CHANGED:
handleDockStateChange();
mWakeLock.release();
break;
}
}
};
private final UEventObserver mObserver = new UEventObserver() {
@Override
public void onUEvent(UEventObserver.UEvent event) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Slog.v(TAG, "Dock UEVENT: " + event.toString());
}
try {
synchronized (mLock) {
setActualDockStateLocked(Integer.parseInt(event.get("SWITCH_STATE")));
}
} catch (NumberFormatException e) {
Slog.e(TAG, "Could not parse switch state from event " + event);
}
}
};
private final class BinderService extends Binder {
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (getContext().checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump dock observer service from from pid="
+ Binder.getCallingPid()
+ ", uid=" + Binder.getCallingUid());
return;
}
final long ident = Binder.clearCallingIdentity();
try {
synchronized (mLock) {
if (args == null || args.length == 0 || "-a".equals(args[0])) {
pw.println("Current Dock Observer Service state:");
if (mUpdatesStopped) {
pw.println(" (UPDATES STOPPED -- use 'reset' to restart)");
}
pw.println(" reported state: " + mReportedDockState);
pw.println(" previous state: " + mPreviousDockState);
pw.println(" actual state: " + mActualDockState);
} else if (args.length == 3 && "set".equals(args[0])) {
String key = args[1];
String value = args[2];
try {
if ("state".equals(key)) {
mUpdatesStopped = true;
setDockStateLocked(Integer.parseInt(value));
} else {
pw.println("Unknown set option: " + key);
}
} catch (NumberFormatException ex) {
pw.println("Bad value: " + value);
}
} else if (args.length == 1 && "reset".equals(args[0])) {
mUpdatesStopped = false;
setDockStateLocked(mActualDockState);
} else {
pw.println("Dump current dock state, or:");
pw.println(" set state <value>");
pw.println(" reset");
}
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
}