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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server;
     18 
     19 import android.bluetooth.BluetoothAdapter;
     20 import android.bluetooth.BluetoothDevice;
     21 import android.content.ContentResolver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.media.AudioManager;
     25 import android.media.Ringtone;
     26 import android.media.RingtoneManager;
     27 import android.net.Uri;
     28 import android.os.Handler;
     29 import android.os.Message;
     30 import android.os.SystemClock;
     31 import android.os.UEventObserver;
     32 import android.provider.Settings;
     33 import android.server.BluetoothService;
     34 import android.util.Log;
     35 import android.util.Slog;
     36 
     37 import java.io.FileNotFoundException;
     38 import java.io.FileReader;
     39 
     40 /**
     41  * <p>DockObserver monitors for a docking station.
     42  */
     43 class DockObserver extends UEventObserver {
     44     private static final String TAG = DockObserver.class.getSimpleName();
     45     private static final boolean LOG = false;
     46 
     47     private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock";
     48     private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state";
     49 
     50     private static final int MSG_DOCK_STATE = 0;
     51 
     52     private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
     53     private int mPreviousDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
     54 
     55     private boolean mSystemReady;
     56 
     57     private final Context mContext;
     58 
     59     private PowerManagerService mPowerManager;
     60 
     61     public DockObserver(Context context, PowerManagerService pm) {
     62         mContext = context;
     63         mPowerManager = pm;
     64         init();  // set initial status
     65 
     66         startObserving(DOCK_UEVENT_MATCH);
     67     }
     68 
     69     @Override
     70     public void onUEvent(UEventObserver.UEvent event) {
     71         if (Log.isLoggable(TAG, Log.VERBOSE)) {
     72             Slog.v(TAG, "Dock UEVENT: " + event.toString());
     73         }
     74 
     75         synchronized (this) {
     76             try {
     77                 int newState = Integer.parseInt(event.get("SWITCH_STATE"));
     78                 if (newState != mDockState) {
     79                     mPreviousDockState = mDockState;
     80                     mDockState = newState;
     81                     if (mSystemReady) {
     82                         // Don't force screen on when undocking from the desk dock.
     83                         // The change in power state will do this anyway.
     84                         // FIXME - we should be configurable.
     85                         if (mPreviousDockState != Intent.EXTRA_DOCK_STATE_DESK ||
     86                                 mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
     87                             mPowerManager.userActivityWithForce(SystemClock.uptimeMillis(),
     88                                     false, true);
     89                         }
     90                         update();
     91                     }
     92                 }
     93             } catch (NumberFormatException e) {
     94                 Slog.e(TAG, "Could not parse switch state from event " + event);
     95             }
     96         }
     97     }
     98 
     99     private final void init() {
    100         char[] buffer = new char[1024];
    101 
    102         try {
    103             FileReader file = new FileReader(DOCK_STATE_PATH);
    104             int len = file.read(buffer, 0, 1024);
    105             mPreviousDockState = mDockState = Integer.valueOf((new String(buffer, 0, len)).trim());
    106 
    107         } catch (FileNotFoundException e) {
    108             Slog.w(TAG, "This kernel does not have dock station support");
    109         } catch (Exception e) {
    110             Slog.e(TAG, "" , e);
    111         }
    112     }
    113 
    114     void systemReady() {
    115         synchronized (this) {
    116             // don't bother broadcasting undocked here
    117             if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
    118                 update();
    119             }
    120             mSystemReady = true;
    121         }
    122     }
    123 
    124     private final void update() {
    125         mHandler.sendEmptyMessage(MSG_DOCK_STATE);
    126     }
    127 
    128     private final Handler mHandler = new Handler() {
    129         @Override
    130         public void handleMessage(Message msg) {
    131             switch (msg.what) {
    132                 case MSG_DOCK_STATE:
    133                     synchronized (this) {
    134                         Slog.i(TAG, "Dock state changed: " + mDockState);
    135 
    136                         final ContentResolver cr = mContext.getContentResolver();
    137 
    138                         if (Settings.Secure.getInt(cr,
    139                                 Settings.Secure.DEVICE_PROVISIONED, 0) == 0) {
    140                             Slog.i(TAG, "Device not provisioned, skipping dock broadcast");
    141                             return;
    142                         }
    143                         // Pack up the values and broadcast them to everyone
    144                         Intent intent = new Intent(Intent.ACTION_DOCK_EVENT);
    145                         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
    146                         intent.putExtra(Intent.EXTRA_DOCK_STATE, mDockState);
    147 
    148                         // Check if this is Bluetooth Dock
    149                         String address = BluetoothService.readDockBluetoothAddress();
    150                         if (address != null)
    151                             intent.putExtra(BluetoothDevice.EXTRA_DEVICE,
    152                                     BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
    153 
    154                         // User feedback to confirm dock connection. Particularly
    155                         // useful for flaky contact pins...
    156                         if (Settings.System.getInt(cr,
    157                                 Settings.System.DOCK_SOUNDS_ENABLED, 1) == 1)
    158                         {
    159                             String whichSound = null;
    160                             if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
    161                                 if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) {
    162                                     whichSound = Settings.System.DESK_UNDOCK_SOUND;
    163                                 } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) {
    164                                     whichSound = Settings.System.CAR_UNDOCK_SOUND;
    165                                 }
    166                             } else {
    167                                 if (mDockState == Intent.EXTRA_DOCK_STATE_DESK) {
    168                                     whichSound = Settings.System.DESK_DOCK_SOUND;
    169                                 } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) {
    170                                     whichSound = Settings.System.CAR_DOCK_SOUND;
    171                                 }
    172                             }
    173 
    174                             if (whichSound != null) {
    175                                 final String soundPath = Settings.System.getString(cr, whichSound);
    176                                 if (soundPath != null) {
    177                                     final Uri soundUri = Uri.parse("file://" + soundPath);
    178                                     if (soundUri != null) {
    179                                         final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri);
    180                                         if (sfx != null) {
    181                                             sfx.setStreamType(AudioManager.STREAM_SYSTEM);
    182                                             sfx.play();
    183                                         }
    184                                     }
    185                                 }
    186                             }
    187                         }
    188 
    189                         mContext.sendStickyBroadcast(intent);
    190                     }
    191                     break;
    192             }
    193         }
    194     };
    195 }
    196