編輯：關於Android編程
本文代碼以MTK平台Android 4.4為分析對象，與Google原生AOSP有些許差異，請讀者知悉。
本文主要介紹MTK Android開機時，SIM卡的Framework部分初始化過程。
先看一段注釋：
/* Once created UiccController registers with RIL for "on" and "unsol_sim_status_changed" * notifications. When such notification arrives UiccController will call * getIccCardStatus (GET_SIM_STATUS). Based on the response of GET_SIM_STATUS * request appropriate tree of uicc objects will be created. * * Following is class diagram for uicc classes: * * UiccController * # * | * UiccCard * # # * | ------------------ * UiccCardApplication CatService * # # * | | * IccRecords IccFileHandler * ^ ^ ^ ^ ^ ^ ^ ^ * SIMRecords---- | | | | | | ---SIMFileHandler * RuimRecords----- | | | | ----RuimFileHandler * IsimUiccRecords--- | | -----UsimFileHandler * | ------CsimFileHandler * ----IsimFileHandler * * Legend: # stands for Composition * ^ stands for Generalization */
這是UiccController.java文件開頭對UiccController的注釋，意思很明顯UiccController是對Android SIM卡管理的控制器。
下面是SIM卡初始化序列圖：
UiccController的初始化是在phone進程啟動的時候，PhoneFactory調用makeDefaultPhone()創建默認的Phone，然後走MTK雙卡流程中，調用MTKPhoneFactZ喎?/kf/ware/vc/" target="_blank" class="keylink">vcnkubWFrZURlZmF1bHRQaG9uZSgptLS9qLXEo6w8YnI+CjwvcD4KPHA+PC9wPgo8cHJlIGNsYXNzPQ=="brush:java;"> {
for (int l2 = 0; l2 < PhoneConstants.GEMINI_SIM_NUM; l2++)
if (j1 == l2)
ai[l2] = j;
else
ai[l2] = 1;
I = new RIL(context, ai[0], l, 0);
J = new RIL(context, ai[1], l, 1);
}
UiccController.make(context, I, 0);
UiccController.make(context, J, 1);
GSMPhone agsmphone[] = new GSMPhone[PhoneConstants.GEMINI_SIM_NUM];
上面是反編譯MTK的static_gemini_intermediates庫看到的，在RIL創建完成時，使用UiccController.make()初始化:
public static UiccController make(Context c, CommandsInterface ci, int simId) {
synchronized (mLock) {
if (FeatureOption.MTK_GEMINI_SUPPORT) {
if(mInstance[simId] != null) {
throw new RuntimeException("UiccController.make() should only be called once");
}
mInstance[simId] = new UiccController(c, ci, simId);
return mInstance[simId];
} else {
if (mInstance[0] != null) {
throw new RuntimeException("UiccController.make() should only be called once");
}
mInstance[0] = new UiccController(c, ci);
return mInstance[0];
}
}
} public static UiccController getInstance(int simId) {
synchronized (mLock) {
if (FeatureOption.MTK_GEMINI_SUPPORT) {
if(mInstance[simId] == null) {
throw new RuntimeException(
"UiccController.getInstance can't be called before make()");
}
return mInstance[simId];
} else {
if (mInstance[0] == null) {
throw new RuntimeException(
"UiccController.getInstance can't be called before make()");
}
return mInstance[0];
}
}
}
private UiccController(Context c, CommandsInterface ci, int simId) {
if (DBG) log("Creating UiccController simId " + simId);
mContext = c;
mCi = ci;
mSimId = simId;
mCi.registerForIccStatusChanged(this, EVENT_ICC_STATUS_CHANGED, null);
// TODO remove this once modem correctly notifies the unsols
mCi.registerForOn(this, EVENT_ICC_STATUS_CHANGED, null);
mCi.registerForVirtualSimOn(this, EVENT_VIRTUAL_SIM_ON, null);
mCi.registerForVirtualSimOff(this, EVENT_VIRTUAL_SIM_OFF, null);
mCi.registerForSimMissing(this, EVENT_SIM_MISSING, null);
mCi.registerForSimRecovery(this, EVENT_SIM_RECOVERY, null);
mCi.registerForSimPlugOut(this, EVENT_SIM_PLUG_OUT, null);
mCi.registerForSimPlugIn(this, EVENT_SIM_PLUG_IN, null);
mCi.registerForInvalidSimDetected(this, EVENT_INVALID_SIM_DETECTED, null);
IntentFilter filter = new IntentFilter();
filter.addAction("android.intent.action.ACTION_SHUTDOWN_IPO");
filter.addAction(GeminiPhone.EVENT_INITIALIZATION_FRAMEWORK_DONE);
filter.addAction(TelephonyIntents.ACTION_SIM_INFO_UPDATE);
filter.addAction(ACTION_RESET_MODEM);
mContext.registerReceiver(mIntentReceiver, filter);
}step1，rild主動上報射頻信號狀態RIL_UNSOL_RESPONSE_RADIO_STATE_CHANGED。
step4，對信號進行判斷，看看返回當前射頻狀態：
private RadioState getRadioStateFromInt(int stateInt) {
RadioState state;
/* RIL_RadioState ril.h */
switch(stateInt) {
case 0: state = RadioState.RADIO_OFF; break;
case 1: state = RadioState.RADIO_UNAVAILABLE; break;
case 2: state = RadioState.SIM_NOT_READY; break;
case 3: state = RadioState.SIM_LOCKED_OR_ABSENT; break;
case 4: state = RadioState.SIM_READY; break;
case 5: state = RadioState.RUIM_NOT_READY; break;
case 6: state = RadioState.RUIM_READY; break;
case 7: state = RadioState.RUIM_LOCKED_OR_ABSENT; break;
case 8: state = RadioState.NV_NOT_READY; break;
case 9: state = RadioState.NV_READY; break;
case 10: state = RadioState.RADIO_ON; break;
case 15: state = RadioState.RADIO_OFF; break;
default:
throw new RuntimeException(
"Unrecognized RIL_RadioState: " + stateInt);
}
return state;
}step6，設置射頻的新狀態，比較新狀態和舊狀態對比，看看發生了什麼變化，step9~step13（還有其他的，沒有列出）對變化作出響應，具體看下面的源碼：
/**
* Store new RadioState and send notification based on the changes
*
* This function is called only by RIL.java when receiving unsolicited
* RIL_UNSOL_RESPONSE_RADIO_STATE_CHANGED
*
* RadioState has 5 values : RADIO_OFF, RADIO_UNAVAILABLE, SIM_NOT_READY,
* SIM_LOCKED_OR_ABSENT, and SIM_READY.
*
* @param newState new RadioState decoded from RIL_UNSOL_RADIO_STATE_CHANGED
*/
protected void setRadioState(RadioState newState) {
RadioState oldState;
synchronized (mStateMonitor) {
Rlog.v(LOG_TAG, "setRadioState old: " + mState + " new " + newState);
oldState = mState;
mState = newState;
// For CTA feature, sim1 is radio on if no sim card inserted.
// In rild, it is in the state of SIM_LOCKED_OR_ABSENT.
// if the sim card is pin locked, then after turn on radio of sim, it still the state of SIM_LOCKED_OR_ABSENT
// special handle for this scenario, always notify radio changed if the state is SIM_LOCKED_OR_ABSENT
if (oldState == mState && mState != RadioState.SIM_LOCKED_OR_ABSENT) {
// no state transition
return;
}
// FIXME: Use Constants or Enums
if(mState.getType() == 0) {
mSimState = mState;
mRuimState = mState;
mNvState = mState;
}
else if (mState.getType() == 1) {
if(mSimState != mState) {
mIccStatusChangedRegistrants.notifyRegistrants();
}
mSimState = mState;
}
else if (mState.getType() == 2) {
if(mRuimState != mState) {
mIccStatusChangedRegistrants.notifyRegistrants();
}
mRuimState = mState;
}
else if (mState.getType() == 3) {
mNvState = mState;
}
mRadioStateChangedRegistrants.notifyRegistrants(new AsyncResult(null, mState, null));
if (mState.isAvailable() && !oldState.isAvailable()) {
Rlog.d(LOG_TAG,"Notifying: radio available");
mAvailRegistrants.notifyRegistrants();
onRadioAvailable();
}
if (!mState.isAvailable() && oldState.isAvailable()) {
Rlog.d(LOG_TAG,"Notifying: radio not available");
mNotAvailRegistrants.notifyRegistrants();
}
if (mState.isOn() && !oldState.isOn()) {
Rlog.d(LOG_TAG,"Notifying: Radio On");
mOnRegistrants.notifyRegistrants();
}
if ((!mState.isOn() || !mState.isAvailable())
&& !((!oldState.isOn() || !oldState.isAvailable()))
) {
Rlog.d(LOG_TAG,"Notifying: radio off or not available");
mOffOrNotAvailRegistrants.notifyRegistrants();
}
/* Radio Technology Change events
* NOTE: isGsm and isCdma have no common states in RADIO_OFF or RADIO_UNAVAILABLE; the
* current phone is determined by mPhoneType
* NOTE: at startup no phone have been created and the RIL determines the mPhoneType
* looking based on the networkMode set by the PhoneFactory in the constructor
*/
if (mState.isGsm() && oldState.isCdma()) {
Rlog.d(LOG_TAG,"Notifying: radio technology change CDMA to GSM");
mVoiceRadioTechChangedRegistrants.notifyRegistrants();
}
if (mState.isGsm() && !oldState.isOn() && (mPhoneType == PhoneConstants.PHONE_TYPE_CDMA)) {
Rlog.d(LOG_TAG,"Notifying: radio technology change CDMA OFF to GSM");
mVoiceRadioTechChangedRegistrants.notifyRegistrants();
}
if (mState.isCdma() && oldState.isGsm()) {
Rlog.d(LOG_TAG,"Notifying: radio technology change GSM to CDMA");
mVoiceRadioTechChangedRegistrants.notifyRegistrants();
}
if (mState.isCdma() && !oldState.isOn() && (mPhoneType == PhoneConstants.PHONE_TYPE_GSM)) {
Rlog.d(LOG_TAG,"Notifying: radio technology change GSM OFF to CDMA");
mVoiceRadioTechChangedRegistrants.notifyRegistrants();
}
}
}step8，對它感興趣的有，GsmServiceStateTracker(更新網絡狀態)、SIMRecords(用IccFileHandler讀取SIM卡內置緊急號碼)和SIMRecordsEx(向RILD查詢20位的Iccid)。
step14，處理step7中mIccStatusChangedRegistrants發出的通知。
step15~step16，請求查詢現在SIM卡的狀態，請求id位RIL_REQUEST_GET_SIM_STATUS。
step17~step20，Rild反饋RIL_REQUEST_GET_SIM_STATUS請求。step19，responseIccCardStatus()方法中會對SIM卡狀態進行解析:
private Object
responseIccCardStatus(Parcel p) {
IccCardApplicationStatus appStatus;
IccCardStatus cardStatus = new IccCardStatus();
cardStatus.setCardState(p.readInt());
cardStatus.setUniversalPinState(p.readInt());
cardStatus.mGsmUmtsSubscriptionAppIndex = p.readInt();
cardStatus.mCdmaSubscriptionAppIndex = p.readInt();
cardStatus.mImsSubscriptionAppIndex = p.readInt();
int numApplications = p.readInt();
// limit to maximum allowed applications
if (numApplications > IccCardStatus.CARD_MAX_APPS) {
numApplications = IccCardStatus.CARD_MAX_APPS;
}
cardStatus.mApplications = new IccCardApplicationStatus[numApplications];
for (int i = 0 ; i < numApplications ; i++) {
appStatus = new IccCardApplicationStatus();
appStatus.app_type = appStatus.AppTypeFromRILInt(p.readInt());
appStatus.app_state = appStatus.AppStateFromRILInt(p.readInt());
appStatus.perso_substate = appStatus.PersoSubstateFromRILInt(p.readInt());
appStatus.aid = p.readString();
appStatus.app_label = p.readString();
appStatus.pin1_replaced = p.readInt();
appStatus.pin1 = appStatus.PinStateFromRILInt(p.readInt());
appStatus.pin2 = appStatus.PinStateFromRILInt(p.readInt());
cardStatus.mApplications[i] = appStatus;
}
return cardStatus;
} private synchronized void onGetIccCardStatusDone(AsyncResult ar, boolean isUpdateSiminfo) {
if (ar.exception != null) {
Rlog.e(LOG_TAG,"[SIM " + mSimId + "] Error getting ICC status. "
+ "RIL_REQUEST_GET_ICC_STATUS should "
+ "never return an error", ar.exception);
return;
}
IccCardStatus status = (IccCardStatus)ar.result;
if (status.mCardState == IccCardStatus.CardState.CARDSTATE_PRESENT) {
if (DBG) log("onGetIccCardStatusDone, disableSimMissingNotification because card is present");
disableSimMissingNotification();
}
if (mUiccCard == null) {
//Create new card
//ALPS01311133: We also need to update SIM Info when SIM hot plug.
mUiccCard = new UiccCard(mContext, mCi, status, mSimId, isUpdateSiminfo);
} else {
//Update already existing card
mUiccCard.update(mContext, mCi , status, isUpdateSiminfo);
}
if (DBG) log("Notifying IccChangedRegistrants, isUpdateSiminfo:" + isUpdateSiminfo);
mIccChangedRegistrants.notifyRegistrants();
} public void update(Context c, CommandsInterface ci, IccCardStatus ics, boolean isUpdateSimInfo) {
synchronized (mLock) {
if (mDestroyed) {
loge("Updated after destroyed! Fix me!");
return;
}
CardState oldState = mCardState;
mCardState = ics.mCardState;
mUniversalPinState = ics.mUniversalPinState;
mGsmUmtsSubscriptionAppIndex = ics.mGsmUmtsSubscriptionAppIndex;
mCdmaSubscriptionAppIndex = ics.mCdmaSubscriptionAppIndex;
mImsSubscriptionAppIndex = ics.mImsSubscriptionAppIndex;
mContext = c;
mCi = ci;
//update applications
if (DBG) log(ics.mApplications.length + " applications");
for ( int i = 0; i < mUiccApplications.length; i++) {
if (mUiccApplications[i] == null) {
//Create newly added Applications
if (i < ics.mApplications.length) {
mUiccApplications[i] = new UiccCardApplication(this,
ics.mApplications[i], mContext, mCi);
mIccRecords = mUiccApplications[i].getIccRecords();
mIccFileHandler = mUiccApplications[i].getIccFileHandler();
}
} else if (i >= ics.mApplications.length) {
//Delete removed applications
if (DBG) log("update mUiccApplications[" + i + "] dispose");
mUiccApplications[i].dispose();
mUiccApplications[i] = null;
} else {
//Update the rest
if (DBG) log("update mUiccApplications[" + i + "] update");
mUiccApplications[i].update(ics.mApplications[i], mContext, mCi);
}
}
//if (!mIccRecordsList.isEmpty()){
// for (IccRecords mIccRecords: mIccRecordsList)
if (mIccRecords != null)
mIccRecords.registerForImsiReady(mHandler, EVENT_IMSI_READY, null);
if (DBG) log("update mUiccApplications.length: " + mUiccApplications.length);
if (mUiccApplications.length > 0 && mUiccApplications[0] != null) {
// Initialize or Reinitialize CatService
mCatService = CatService.getInstance(mCi,
mContext,
this);
} else {
if (mCatService != null) {
mCatService.dispose();
}
mCatService = null;
}
sanitizeApplicationIndexes();
RadioState radioState = mCi.getRadioState();
if (DBG) log("update: radioState=" + radioState + " mLastRadioState="
+ mLastRadioState);
if(isUpdateSimInfo) { //SIM卡熱插拔會用到這裡
// No notifications while radio is off or we just powering up
//if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
if (radioState != RadioState.RADIO_UNAVAILABLE) {
if (mCardState == CardState.CARDSTATE_ABSENT) {
if (DBG) log("update: notify card removed");
mAbsentRegistrants.notifyRegistrants();
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
//Update SIM inserted state
if (FeatureOption.MTK_GEMINI_SUPPORT) {
Phone defaultPhone = PhoneFactory.getDefaultPhone();
((GeminiPhone)defaultPhone).setSimInsertedState(getMySimId(), false);
}
} else if (oldState == CardState.CARDSTATE_ABSENT &&
mCardState != CardState.CARDSTATE_ABSENT) {
if (DBG) log("update: notify card added");
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
}
}
}
mLastRadioState = radioState;
}
}UiccCardApplication執行update()操作時，如果此時SIM卡應用的狀態是APPSTATE_READY，這要進行如下操作:
if (mAppState != oldAppState) {
if (DBG) log(oldAppType + " changed state: " + oldAppState + " -> " + mAppState);
// If the app state turns to APPSTATE_READY, then query FDN status,
//as it might have failed in earlier attempt.
if (mAppState == AppState.APPSTATE_READY) {
queryFdn();//讀取FDN數據
queryPin1State();//查詢pin狀態
}
notifyPinLockedRegistrantsIfNeeded(null);
notifyReadyRegistrantsIfNeeded(null);
}如果SIM卡被鎖住了，則會通知彈出解鎖框。
step31，通知去讀取SIM卡的IMSI。
step32，創建SIM Toolkit Telephony Service。
step33，通知所有關注mIccChangedRegistrants變化的觀察者，如IccCardProxy(代理各種類型的SIM卡)。
接下來還有很多狀態變化，各種狀態變化太復雜了，先說到這吧。。。
右鍵復制圖片地址，在浏覽器中打開即可查看大圖。
未完待續，有不對的地方，請指正。
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