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      1 /*
      2  * Copyright (c) 2011 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.internal.telephony.cdma;
     18 
     19 import java.util.concurrent.atomic.AtomicInteger;
     20 
     21 import com.android.internal.telephony.CommandsInterface;
     22 import android.content.Context;
     23 import android.os.AsyncResult;
     24 import android.os.Handler;
     25 import android.os.Message;
     26 import android.os.Registrant;
     27 import android.os.RegistrantList;
     28 import android.provider.Settings;
     29 import android.telephony.Rlog;
     30 
     31 /**
     32  * Class that handles the CDMA subscription source changed events from RIL
     33  */
     34 public class CdmaSubscriptionSourceManager extends Handler {
     35     static final String LOG_TAG = "CdmaSSM";
     36     private static final int EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED = 1;
     37     private static final int EVENT_GET_CDMA_SUBSCRIPTION_SOURCE     = 2;
     38     private static final int EVENT_RADIO_ON                         = 3;
     39     private static final int EVENT_SUBSCRIPTION_STATUS_CHANGED      = 4;
     40 
     41     // To know subscription is activated
     42     private static final int SUBSCRIPTION_ACTIVATED                 = 1;
     43 
     44     public static final int SUBSCRIPTION_SOURCE_UNKNOWN = -1;
     45     public static final int SUBSCRIPTION_FROM_RUIM      = 0; /* CDMA subscription from RUIM */
     46     public static final int SUBSCRIPTION_FROM_NV        = 1; /* CDMA subscription from NV */
     47     public static final int PREFERRED_CDMA_SUBSCRIPTION = SUBSCRIPTION_FROM_NV;
     48 
     49     private static CdmaSubscriptionSourceManager sInstance;
     50     private static final Object sReferenceCountMonitor = new Object();
     51     private static int sReferenceCount = 0;
     52 
     53     // ***** Instance Variables
     54     private CommandsInterface mCi;
     55     private Context mContext;
     56     private RegistrantList mCdmaSubscriptionSourceChangedRegistrants = new RegistrantList();
     57 
     58     // Type of CDMA subscription source
     59     private AtomicInteger mCdmaSubscriptionSource = new AtomicInteger(SUBSCRIPTION_FROM_NV);
     60 
     61     // Constructor
     62     private CdmaSubscriptionSourceManager(Context context, CommandsInterface ci) {
     63         mContext = context;
     64         mCi = ci;
     65         mCi.registerForCdmaSubscriptionChanged(this, EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED, null);
     66         mCi.registerForOn(this, EVENT_RADIO_ON, null);
     67         int subscriptionSource = getDefault(context);
     68         mCdmaSubscriptionSource.set(subscriptionSource);
     69         mCi.registerForSubscriptionStatusChanged(this, EVENT_SUBSCRIPTION_STATUS_CHANGED, null);
     70     }
     71 
     72     /**
     73      * This function creates a single instance of this class
     74      *
     75      * @return object of type CdmaSubscriptionSourceManager
     76      */
     77     public static CdmaSubscriptionSourceManager getInstance(Context context,
     78             CommandsInterface ci, Handler h, int what, Object obj) {
     79         synchronized (sReferenceCountMonitor) {
     80             if (null == sInstance) {
     81                 sInstance = new CdmaSubscriptionSourceManager(context, ci);
     82             }
     83             CdmaSubscriptionSourceManager.sReferenceCount++;
     84         }
     85         sInstance.registerForCdmaSubscriptionSourceChanged(h, what, obj);
     86         return sInstance;
     87     }
     88 
     89     /**
     90      * Unregisters for the registered event with RIL
     91      */
     92     public void dispose(Handler h) {
     93         mCdmaSubscriptionSourceChangedRegistrants.remove(h);
     94         synchronized (sReferenceCountMonitor) {
     95             sReferenceCount--;
     96             if (sReferenceCount <= 0) {
     97                 mCi.unregisterForCdmaSubscriptionChanged(this);
     98                 mCi.unregisterForOn(this);
     99                 mCi.unregisterForSubscriptionStatusChanged(this);
    100                 sInstance = null;
    101             }
    102         }
    103     }
    104 
    105     /*
    106      * (non-Javadoc)
    107      * @see android.os.Handler#handleMessage(android.os.Message)
    108      */
    109     @Override
    110     public void handleMessage(Message msg) {
    111         AsyncResult ar;
    112         switch (msg.what) {
    113             case EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED:
    114             case EVENT_GET_CDMA_SUBSCRIPTION_SOURCE:
    115             {
    116                 log("CDMA_SUBSCRIPTION_SOURCE event = " + msg.what);
    117                 ar = (AsyncResult) msg.obj;
    118                 handleGetCdmaSubscriptionSource(ar);
    119             }
    120             break;
    121             case EVENT_RADIO_ON: {
    122                 mCi.getCdmaSubscriptionSource(obtainMessage(EVENT_GET_CDMA_SUBSCRIPTION_SOURCE));
    123             }
    124             break;
    125             case EVENT_SUBSCRIPTION_STATUS_CHANGED: {
    126                 log("EVENT_SUBSCRIPTION_STATUS_CHANGED");
    127                 ar = (AsyncResult)msg.obj;
    128                 if (ar.exception == null) {
    129                     int actStatus = ((int[])ar.result)[0];
    130                     log("actStatus = " + actStatus);
    131                     if (actStatus == SUBSCRIPTION_ACTIVATED) { // Subscription Activated
    132                         // In case of multi-SIM, framework should wait for the subscription ready
    133                         // to send any request to RIL.  Otherwise it will return failure.
    134                         Rlog.v(LOG_TAG,"get Cdma Subscription Source");
    135                         mCi.getCdmaSubscriptionSource(
    136                                 obtainMessage(EVENT_GET_CDMA_SUBSCRIPTION_SOURCE));
    137                     }
    138                 } else {
    139                     logw("EVENT_SUBSCRIPTION_STATUS_CHANGED, Exception:" + ar.exception);
    140                 }
    141             }
    142             break;
    143             default:
    144                 super.handleMessage(msg);
    145         }
    146     }
    147 
    148     /**
    149      * Returns the current CDMA subscription source value
    150      * @return CDMA subscription source value
    151      */
    152     public int getCdmaSubscriptionSource() {
    153         return mCdmaSubscriptionSource.get();
    154     }
    155 
    156     /**
    157      * Gets the default CDMA subscription source
    158      *
    159      * @return Default CDMA subscription source from Settings DB if present.
    160      */
    161     public static int getDefault(Context context) {
    162         // Get the default value from the Settings
    163         int subscriptionSource = Settings.Global.getInt(context.getContentResolver(),
    164                 Settings.Global.CDMA_SUBSCRIPTION_MODE, PREFERRED_CDMA_SUBSCRIPTION);
    165         return subscriptionSource;
    166     }
    167 
    168     /**
    169      * Clients automatically register for CDMA subscription source changed event
    170      * when they get an instance of this object.
    171      */
    172     private void registerForCdmaSubscriptionSourceChanged(Handler h, int what, Object obj) {
    173         Registrant r = new Registrant (h, what, obj);
    174         mCdmaSubscriptionSourceChangedRegistrants.add(r);
    175     }
    176 
    177     /**
    178      * Handles the call to get the subscription source
    179      *
    180      * @param ar AsyncResult object that contains the result of get CDMA
    181      *            subscription source call
    182      */
    183     private void handleGetCdmaSubscriptionSource(AsyncResult ar) {
    184         if ((ar.exception == null) && (ar.result != null)) {
    185             int newSubscriptionSource = ((int[]) ar.result)[0];
    186 
    187             if (newSubscriptionSource != mCdmaSubscriptionSource.get()) {
    188                 log("Subscription Source Changed : " + mCdmaSubscriptionSource + " >> "
    189                         + newSubscriptionSource);
    190                 mCdmaSubscriptionSource.set(newSubscriptionSource);
    191 
    192                 // Notify registrants of the new CDMA subscription source
    193                 mCdmaSubscriptionSourceChangedRegistrants.notifyRegistrants(new AsyncResult(null,
    194                         null, null));
    195             }
    196         } else {
    197             // GET_CDMA_SUBSCRIPTION is returning Failure. Probably
    198             // because modem created GSM Phone. If modem created
    199             // GSMPhone, then PhoneProxy will trigger a change in
    200             // Phone objects and this object will be destroyed.
    201             logw("Unable to get CDMA Subscription Source, Exception: " + ar.exception
    202                     + ", result: " + ar.result);
    203         }
    204     }
    205 
    206     private void log(String s) {
    207         Rlog.d(LOG_TAG, s);
    208     }
    209 
    210     private void logw(String s) {
    211         Rlog.w(LOG_TAG, s);
    212     }
    213 
    214 }
    215