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.content.ContentResolver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.media.AudioManager; 23 import android.media.Ringtone; 24 import android.media.RingtoneManager; 25 import android.net.Uri; 26 import android.os.Handler; 27 import android.os.Message; 28 import android.os.PowerManager; 29 import android.os.SystemClock; 30 import android.os.UEventObserver; 31 import android.os.UserHandle; 32 import android.provider.Settings; 33 import android.util.Log; 34 import android.util.Slog; 35 36 import java.io.FileNotFoundException; 37 import java.io.FileReader; 38 39 /** 40 * <p>DockObserver monitors for a docking station. 41 */ 42 final class DockObserver extends UEventObserver { 43 private static final String TAG = DockObserver.class.getSimpleName(); 44 45 private static final String DOCK_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/dock"; 46 private static final String DOCK_STATE_PATH = "/sys/class/switch/dock/state"; 47 48 private static final int MSG_DOCK_STATE_CHANGED = 0; 49 50 private final Object mLock = new Object(); 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 private final PowerManager mPowerManager; 59 private final PowerManager.WakeLock mWakeLock; 60 61 public DockObserver(Context context) { 62 mContext = context; 63 64 mPowerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE); 65 mWakeLock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 66 67 init(); // set initial status 68 startObserving(DOCK_UEVENT_MATCH); 69 } 70 71 @Override 72 public void onUEvent(UEventObserver.UEvent event) { 73 if (Log.isLoggable(TAG, Log.VERBOSE)) { 74 Slog.v(TAG, "Dock UEVENT: " + event.toString()); 75 } 76 77 synchronized (mLock) { 78 try { 79 int newState = Integer.parseInt(event.get("SWITCH_STATE")); 80 if (newState != mDockState) { 81 mPreviousDockState = mDockState; 82 mDockState = newState; 83 if (mSystemReady) { 84 // Wake up immediately when docked or undocked. 85 mPowerManager.wakeUp(SystemClock.uptimeMillis()); 86 87 updateLocked(); 88 } 89 } 90 } catch (NumberFormatException e) { 91 Slog.e(TAG, "Could not parse switch state from event " + event); 92 } 93 } 94 } 95 96 private void init() { 97 synchronized (mLock) { 98 try { 99 char[] buffer = new char[1024]; 100 FileReader file = new FileReader(DOCK_STATE_PATH); 101 try { 102 int len = file.read(buffer, 0, 1024); 103 mDockState = Integer.valueOf((new String(buffer, 0, len)).trim()); 104 mPreviousDockState = mDockState; 105 } finally { 106 file.close(); 107 } 108 } catch (FileNotFoundException e) { 109 Slog.w(TAG, "This kernel does not have dock station support"); 110 } catch (Exception e) { 111 Slog.e(TAG, "" , e); 112 } 113 } 114 } 115 116 void systemReady() { 117 synchronized (mLock) { 118 // don't bother broadcasting undocked here 119 if (mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED) { 120 updateLocked(); 121 } 122 mSystemReady = true; 123 } 124 } 125 126 private void updateLocked() { 127 mWakeLock.acquire(); 128 mHandler.sendEmptyMessage(MSG_DOCK_STATE_CHANGED); 129 } 130 131 private void handleDockStateChange() { 132 synchronized (mLock) { 133 Slog.i(TAG, "Dock state changed: " + mDockState); 134 135 // Skip the dock intent if not yet provisioned. 136 final ContentResolver cr = mContext.getContentResolver(); 137 if (Settings.Global.getInt(cr, 138 Settings.Global.DEVICE_PROVISIONED, 0) == 0) { 139 Slog.i(TAG, "Device not provisioned, skipping dock broadcast"); 140 return; 141 } 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 // Play a sound to provide feedback to confirm dock connection. 149 // Particularly useful for flaky contact pins... 150 if (Settings.Global.getInt(cr, 151 Settings.Global.DOCK_SOUNDS_ENABLED, 1) == 1) { 152 String whichSound = null; 153 if (mDockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) { 154 if ((mPreviousDockState == Intent.EXTRA_DOCK_STATE_DESK) || 155 (mPreviousDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) || 156 (mPreviousDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) { 157 whichSound = Settings.Global.DESK_UNDOCK_SOUND; 158 } else if (mPreviousDockState == Intent.EXTRA_DOCK_STATE_CAR) { 159 whichSound = Settings.Global.CAR_UNDOCK_SOUND; 160 } 161 } else { 162 if ((mDockState == Intent.EXTRA_DOCK_STATE_DESK) || 163 (mDockState == Intent.EXTRA_DOCK_STATE_LE_DESK) || 164 (mDockState == Intent.EXTRA_DOCK_STATE_HE_DESK)) { 165 whichSound = Settings.Global.DESK_DOCK_SOUND; 166 } else if (mDockState == Intent.EXTRA_DOCK_STATE_CAR) { 167 whichSound = Settings.Global.CAR_DOCK_SOUND; 168 } 169 } 170 171 if (whichSound != null) { 172 final String soundPath = Settings.Global.getString(cr, whichSound); 173 if (soundPath != null) { 174 final Uri soundUri = Uri.parse("file://" + soundPath); 175 if (soundUri != null) { 176 final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri); 177 if (sfx != null) { 178 sfx.setStreamType(AudioManager.STREAM_SYSTEM); 179 sfx.play(); 180 } 181 } 182 } 183 } 184 } 185 186 // Send the dock event intent. 187 // There are many components in the system watching for this so as to 188 // adjust audio routing, screen orientation, etc. 189 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 190 191 // Release the wake lock that was acquired when the message was posted. 192 mWakeLock.release(); 193 } 194 } 195 196 private final Handler mHandler = new Handler(true /*async*/) { 197 @Override 198 public void handleMessage(Message msg) { 199 switch (msg.what) { 200 case MSG_DOCK_STATE_CHANGED: 201 handleDockStateChange(); 202 break; 203 } 204 } 205 }; 206 } 207