Add RingerSwitch support

This patch adds support for the Geeksphone ONE's MUTE hard key.
I don't know of any other device with such a key, so this will
defaults to disabled. It's enabled by setting the "ro.config.ringerswitch"
property to 1

Change-Id: Ica18f3f3ee872b4b911ddd79b95ba569cb13f4e8

2 files changed, 153 insertions, 0 deletions

diff --git a/services/java/com/android/server/RingerSwitchObserver.java b/services/java/com/android/server/RingerSwitchObserver.java
new file mode 100644
index 0000000..54a6526
--- /dev/null
+++ b/services/java/com/android/server/RingerSwitchObserver.java
@@ -0,0 +1,141 @@
+/*
+ * 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.app.ActivityManagerNative;
+import android.content.Context;
+import android.os.UEventObserver;
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.util.Log;
+import android.os.ServiceManager;
+import android.os.RemoteException;
+import android.os.Vibrator;
+
+import android.view.VolumePanel;
+
+import android.media.AudioService;
+import android.media.IAudioService;
+import android.media.AudioManager;
+
+import java.io.FileReader;
+import java.io.FileNotFoundException;
+
+/**
+ * <p>RingerSwitchObserver monitors the ONE's mute switch
+ */
+class RingerSwitchObserver extends UEventObserver {
+    private static final String TAG = RingerSwitchObserver.class.getSimpleName();
+    private static final boolean LOG = false;
+
+    private static final String RINGER_SWITCH_UEVENT_MATCH = "DEVPATH=/devices/virtual/switch/ringer_switch";
+    private static final String RINGER_SWITCH_STATE_PATH = "/sys/class/switch/ringer_switch/state";
+    private static final String RINGER_SWITCH_NAME_PATH = "/sys/class/switch/ringer_switch/name";
+
+    private int mRingerswitchState;
+    private String mRingerswitchName;
+    private IAudioService mAudioService;
+    private Context mContext;
+    private VolumePanel mVolumePanel;
+
+    private final WakeLock mWakeLock;  // held while there is a pending route change
+
+    public RingerSwitchObserver(Context context) {
+
+        mContext = context;
+
+        PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
+        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "RingerSwitchObserver");
+        mWakeLock.setReferenceCounted(false);
+
+        startObserving(RINGER_SWITCH_UEVENT_MATCH);
+
+        init();  // set initial status
+    }
+
+    @Override
+        public void onUEvent(UEventObserver.UEvent event) {
+            if (LOG) Log.v(TAG, "Ringerswitch UEVENT: " + event.toString());
+
+            try {
+                update(event.get("SWITCH_NAME"), Integer.parseInt(event.get("SWITCH_STATE")));
+            } catch (NumberFormatException e) {
+                Log.e(TAG, "Could not parse switch state from event " + event);
+            }
+        }
+
+    private synchronized final void init() {
+        char[] buffer = new char[1024];
+
+        String newName = mRingerswitchName;
+        int newState = mRingerswitchState;
+        try {
+            FileReader file = new FileReader(RINGER_SWITCH_STATE_PATH);
+            int len = file.read(buffer, 0, 1024);
+            newState = Integer.valueOf((new String(buffer, 0, len)).trim());
+
+            file = new FileReader(RINGER_SWITCH_NAME_PATH);
+            len = file.read(buffer, 0, 1024);
+            newName = new String(buffer, 0, len).trim();
+
+        } catch (FileNotFoundException e) {
+            Log.w(TAG, "This kernel does not have ringer switch support");
+            return;
+        } catch (Exception e) {
+            Log.e(TAG, "" , e);
+        }
+
+        mAudioService = IAudioService.Stub.asInterface(ServiceManager.checkService(Context.AUDIO_SERVICE));
+        mVolumePanel = new VolumePanel(mContext, (AudioService) mAudioService);
+    }
+
+    private synchronized final void update(String newName, int newState) {
+        if (newName != mRingerswitchName || newState != mRingerswitchState) {
+            boolean isRingerOn = (newState == 0 && mRingerswitchState == 1);
+
+            mRingerswitchName = newName;
+            mRingerswitchState = newState;
+
+
+            try {
+
+                if (isRingerOn) {
+                    //Log.w(TAG,"Got ringer on");
+                    mAudioService.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
+                } else {
+                    //Log.w(TAG,"Got ringer off");
+                    AudioManager mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+                    boolean vibrateSetting = mAudioManager.getVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER) == AudioManager.VIBRATE_SETTING_ON;
+
+
+                    // We probably lowered the volume on the way "down", so
+                    // raise it a notch before muting
+                    mAudioService.adjustStreamVolume(AudioManager.STREAM_RING, AudioManager.ADJUST_RAISE, 0 );
+                    mAudioService.setRingerMode(vibrateSetting ? AudioManager.RINGER_MODE_VIBRATE : AudioManager.RINGER_MODE_SILENT);
+
+                }
+
+                // Raise UI
+                mVolumePanel.postVolumeChanged(AudioManager.STREAM_RING,AudioManager.FLAG_SHOW_UI | AudioManager.FLAG_VIBRATE);
+
+            } catch (RemoteException e) {
+            }
+        }
+    }
+
+
+}
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index b7a7bbf..7efee6e 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -102,6 +102,7 @@ class ServerThread extends Thread {
         UiModeManagerService uiMode = null;
         RecognitionManagerService recognition = null;
         ThrottleService throttle = null;
+        RingerSwitchObserver ringer = null;
 
         // Critical services...
         try {
@@ -372,6 +373,16 @@ class ServerThread extends Thread {
             }
 
             try {
+                if (SystemProperties.get("ro.config.ringerswitch").equals("1")) {
+                    Slog.i(TAG, "RingerSwitch Observer");
+                    // Listen for hard ringer switch changes
+                    ringer = new RingerSwitchObserver(context);
+                }
+            } catch (Throwable e) {
+                Slog.e(TAG, "Failure starting RingerSwitchObserver", e);
+            }
+
+            try {
                 Slog.i(TAG, "Dock Observer");
                 // Listen for dock station changes
                 dock = new DockObserver(context, power);
@@ -422,6 +433,7 @@ class ServerThread extends Thread {
             } catch (Throwable e) {
                 Slog.e(TAG, "Failure starting DiskStats Service", e);
             }
+
         }
 
         // make sure the ADB_ENABLED setting value matches the secure property value