GitHub - tingkts/Android-Telephony: Android Telephony, RIL, Radio of Modem module

Overview

Telephony App/Service

Telephony Provider

// e.g. APN conf file, database

imx8mp_evk:/ # system/etc/apn-conf.xml

imx8mp_evk:/ # data/user_de/0/com.android.providers.telephony/databases
$ ls -al
total 1100
drwxr-xr-x 1 ting 1049089      0 Mar 17 13:06 ./
drwxr-xr-x 1 ting 1049089      0 Mar 17 13:06 ../
-r--r--r-- 1 ting 1049089  20480 Mar 17 12:06 CarrierInformation.db
-r--r--r-- 1 ting 1049089      0 Mar 17 12:06 CarrierInformation.db-journal
-r--r--r-- 1 ting 1049089  57344 Mar 17 12:06 HbpcdLookup.db
-r--r--r-- 1 ting 1049089      0 Mar 17 12:06 HbpcdLookup.db-journal
-r--r--r-- 1 ting 1049089 229376 Mar 17 12:06 carrierIdentification.db
-r--r--r-- 1 ting 1049089      0 Mar 17 12:06 carrierIdentification.db-journal
-r--r--r-- 1 ting 1049089 118784 Mar 17 12:06 mmssms.db
-r--r--r-- 1 ting 1049089      0 Mar 17 12:06 mmssms.db-journal
-r--r--r-- 1 ting 1049089 696320 Mar 17 12:06 telephony.db
-r--r--r-- 1 ting 1049089      0 Mar 17 12:06 telephony.db-journal

☛ Android：一篇就够！全面&详细解析APN（涉及内容：GGSN，authtype，MVNO，pdp，Apns-conf，supl,hipri,dun）

Telephony Framework

frameworks/opt/telephony/
frameworks/base/telephony/

The client of HIDL Radio service of IRadio

frameworks/opt/telephony/src/java/com/android/internal/telephony/RIL.java

// frameworks/opt/telephony/src/java/com/android/internal/telephony/RIL.java

39 import android.hardware.radio.V1_0.IRadio;

190    volatile IRadio mRadioProxy = null;

351    /** Returns a {@link IRadio} instance or null if the service is not available. */
352    @VisibleForTesting
353    public IRadio getRadioProxy(Message result) {
354        if (!mIsMobileNetworkSupported) {
355            if (RILJ_LOGV) riljLog("getRadioProxy: Not calling getService(): wifi-only");
356            if (result != null) {
357                AsyncResult.forMessage(result, null,
358                        CommandException.fromRilErrno(RADIO_NOT_AVAILABLE));
359                result.sendToTarget();
360            }
361            return null;
362        }
363
364        if (mRadioProxy != null) {
365            return mRadioProxy;
366        }
367
368        try {
369            mRadioProxy = IRadio.getService(HIDL_SERVICE_NAME[mPhoneId == null ? 0 : mPhoneId],
370                    true);
371            if (mRadioProxy != null) {
372                mRadioProxy.linkToDeath(mRadioProxyDeathRecipient,
373                        mRadioProxyCookie.incrementAndGet());
374                mRadioProxy.setResponseFunctions(mRadioResponse, mRadioIndication);
375            } else {
376                riljLoge("getRadioProxy: mRadioProxy == null");
377            }
378        } catch (RemoteException | RuntimeException e) {
379            mRadioProxy = null;
380            riljLoge("RadioProxy getService/setResponseFunctions: " + e);
381        }
382
383        if (mRadioProxy == null) {
384            // getService() is a blocking call, so this should never happen
385            riljLoge("getRadioProxy: mRadioProxy == null");
386            if (result != null) {
387                AsyncResult.forMessage(result, null,
388                        CommandException.fromRilErrno(RADIO_NOT_AVAILABLE));
389                result.sendToTarget();
390            }
391        }
392
393        return mRadioProxy;
394    }

527    @Override
528    public void getIccCardStatus(Message result) {
529        IRadio radioProxy = getRadioProxy(result);
530        if (radioProxy != null) {
531            RILRequest rr = obtainRequest(RIL_REQUEST_GET_SIM_STATUS, result,
532                    mRILDefaultWorkSource);
533
534            if (RILJ_LOGD) riljLog(rr.serialString() + "> " + requestToString(rr.mRequest));
535
536            try {
537                radioProxy.getIccCardStatus(rr.mSerial);
538            } catch (RemoteException | RuntimeException e) {
539                handleRadioProxyExceptionForRR(rr, "getIccCardStatus", e);
540            }
541        }
542    }

The client of HIDL Radio service of IRadioConfig

frameworks/opt/telephony/src/java/com/android/internal/telephony/RadioConfig.java

// frameworks/opt/telephony/src/java/com/android/internal/telephony/RadioConfig.java

26 import android.hardware.radio.config.V1_0.IRadioConfig;

56    private volatile IRadioConfig mRadioConfigProxy = null;

152    /** Returns a {@link IRadioConfig} instance or null if the service is not available. */
153    public IRadioConfig getRadioConfigProxy(Message result) {
154        if (!mIsMobileNetworkSupported) {
155            if (VDBG) logd("getRadioConfigProxy: Not calling getService(): wifi-only");
156            if (result != null) {
157                AsyncResult.forMessage(result, null,
158                        CommandException.fromRilErrno(RADIO_NOT_AVAILABLE));
159                result.sendToTarget();
160            }
161            return null;
162        }
163
164        if (mRadioConfigProxy != null) {
165            return mRadioConfigProxy;
166        }
167
168        try {
169            mRadioConfigProxy = IRadioConfig.getService(true);
170            if (mRadioConfigProxy != null) {
171                mRadioConfigProxy.linkToDeath(mServiceDeathRecipient,
172                        mRadioConfigProxyCookie.incrementAndGet());
173                mRadioConfigProxy.setResponseFunctions(mRadioConfigResponse,
174                        mRadioConfigIndication);
175            } else {
176                loge("getRadioConfigProxy: mRadioConfigProxy == null");
177            }
178        } catch (RemoteException | RuntimeException e) {
179            mRadioConfigProxy = null;
180            loge("getRadioConfigProxy: RadioConfigProxy getService/setResponseFunctions: " + e);
181        }
182
183        if (mRadioConfigProxy == null) {
184            // getService() is a blocking call, so this should never happen
185            loge("getRadioConfigProxy: mRadioConfigProxy == null");
186            if (result != null) {
187                AsyncResult.forMessage(result, null,
188                        CommandException.fromRilErrno(RADIO_NOT_AVAILABLE));
189                result.sendToTarget();
190            }
191        }
192
193        return mRadioConfigProxy;
194    }

240    /**
241     * Wrapper function for IRadioConfig.getSimSlotsStatus().
242     */
243    public void getSimSlotsStatus(Message result) {
244        IRadioConfig radioConfigProxy = getRadioConfigProxy(result);
245        if (radioConfigProxy != null) {
246            RILRequest rr = obtainRequest(RIL_REQUEST_GET_SLOT_STATUS, result, mDefaultWorkSource);
247
248            if (DBG) {
249                logd(rr.serialString() + "> " + requestToString(rr.mRequest));
250            }
251
252            try {
253                radioConfigProxy.getSimSlotsStatus(rr.mSerial);
254            } catch (RemoteException | RuntimeException e) {
255                resetProxyAndRequestList("getSimSlotsStatus", e);
256            }
257        }
258    }
259

frameworks/opt/telephony/src/java/com/android/internal/telephony/RadioConfigResponse.java

// frameworks/opt/telephony/src/java/com/android/internal/telephony/RadioConfigResponse.java
40    /**
41     * Response function for IRadioConfig.getSimSlotsStatus().
42     */
43    public void getSimSlotsStatusResponse(RadioResponseInfo responseInfo,
44                                          ArrayList<SimSlotStatus> slotStatus) {
45        RILRequest rr = mRadioConfig.processResponse(responseInfo);
46
47        if (rr != null) {
48            ArrayList<IccSlotStatus> ret = RadioConfig.convertHalSlotStatus(slotStatus);
49            if (responseInfo.error == RadioError.NONE) {
50                // send response
51                RadioResponse.sendMessageResponse(rr.mResult, ret);
52                Rlog.d(TAG, rr.serialString() + "< "
53                        + mRadioConfig.requestToString(rr.mRequest) + " " + ret.toString());
54            } else {
55                rr.onError(responseInfo.error, ret);
56                Rlog.e(TAG, rr.serialString() + "< "
57                        + mRadioConfig.requestToString(rr.mRequest) + " error "
58                        + responseInfo.error);
59            }
60
61        } else {
62            Rlog.e(TAG, "getSimSlotsStatusResponse: Error " + responseInfo.toString());
63        }
64    }

Radio HIDL

HIDL Interface of Radio

ting@ting-pc:~/aosp/android-9/hardware/interfaces/radio
$ ls -al
total 48
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 ./
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 ../
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.0/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.1/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.2/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.3/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.4/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.5/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.6/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 config/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 deprecated/

IRadio

IRadio is implemented by libril

# e.g. java: android.hardware.radio.1.1.IRadio
# e.g. c/C++: android::hardware::radio::1.1::IRadio

ting@ting-pc:~/aosp/android-9/hardware/interfaces/radio/1.0
$ ls -al
total 289
drwxr-xr-x 1 ting 197121     0 十二月 25 17:53 ./
drwxr-xr-x 1 ting 197121     0 十二月 25 17:53 ../
-rw-r--r-- 1 ting 197121   413 十二月 25 17:53 Android.bp
-rw-r--r-- 1 ting 197121 59221 十二月 25 17:53 IRadio.hal
-rw-r--r-- 1 ting 197121 17849 十二月 25 17:53 IRadioIndication.hal
-rw-r--r-- 1 ting 197121 92745 十二月 25 17:53 IRadioResponse.hal
-rw-r--r-- 1 ting 197121  2961 十二月 25 17:53 ISap.hal
-rw-r--r-- 1 ting 197121  6189 十二月 25 17:53 ISapCallback.hal
-rw-r--r-- 1 ting 197121 97551 十二月 25 17:53 types.hal
drwxr-xr-x 1 ting 197121     0 十二月 25 17:53 vts/

ting@ting-pc:~/aosp/android-9/hardware/interfaces/radio/1.1
$ ls -al
total 41
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 ./
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 ../
-rw-r--r-- 1 ting 197121  423 十二月 25 17:53 Android.bp
-rw-r--r-- 1 ting 197121 4899 十二月 25 17:53 IRadio.hal
-rw-r--r-- 1 ting 197121 2013 十二月 25 17:53 IRadioIndication.hal
-rw-r--r-- 1 ting 197121 3355 十二月 25 17:53 IRadioResponse.hal
-rw-r--r-- 1 ting 197121  778 十二月 25 17:53 ISap.hal
-rw-r--r-- 1 ting 197121 8644 十二月 25 17:53 types.hal
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 vts/

IRadioConfig

IRadioConfig is the optional implementation by modem vendor.

ting@ting-pc:~/aosp/android-9/hardware/interfaces/radio/config
$ ls -al
total 16
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 ./
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 ../
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.0/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.1/
drwxr-xr-x 1 ting 197121 0 十二月 25 17:53 1.2/

ting@ting-pc:~/aosp/android-9/hardware/interfaces/radio/config/1.0
$ ls -al
total 25
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 ./
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 ../
-rw-r--r-- 1 ting 197121  427 十二月 25 17:53 Android.bp
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 default/
-rw-r--r-- 1 ting 197121 3875 十二月 25 17:53 IRadioConfig.hal
-rw-r--r-- 1 ting 197121 1419 十二月 25 17:53 IRadioConfigIndication.hal
-rw-r--r-- 1 ting 197121 1847 十二月 25 17:53 IRadioConfigResponse.hal
-rw-r--r-- 1 ting 197121 1905 十二月 25 17:53 types.hal
drwxr-xr-x 1 ting 197121    0 十二月 25 17:53 vts/

RIL Daemon

◤ For Android versions prior to Android 8.0, RIL daemon use Socket to communicate with Anroid phone framework.

◤ On Android 8.0 or later versions, the communication interface between Android phone framework and ril-daemon service has been changed from socket to HIDL.

ting@ting-pc:~/aosp/android-9/hardware/ril$ ls -al
total 36
drwxrwxr-x  7 ting ting 4096 Nov 12 21:23 ./
drwxrwxr-x 12 ting ting 4096 Dec 15 17:14 ../
-rw-rw-r--  1 ting ting 2850 Nov 12 21:23 CleanSpec.mk
-rw-rw-r--  1 ting ting  152 Nov 12 21:23 OWNERS
drwxrwxr-x  4 ting ting 4096 Nov 12 21:23 include/
drwxrwxr-x  2 ting ting 4096 Nov 12 21:23 libril/             // Radio HIDL Impl.
drwxrwxr-x  3 ting ting 4096 Nov 12 21:23 librilutils/
drwxrwxr-x  2 ting ting 4096 Nov 12 21:23 reference-ril/      // Vendor RIL
drwxrwxr-x  2 ting ting 4096 Nov 12 21:23 rild/               // RIL Daemon

rild

The RIL Daemon talks to the telephony services and dispatches "solicited commands" to the Vendor RIL.

ting@ting-pc:~/aosp/android-9/hardware/ril/rild$ ls -al
total 40
drwxrwxr-x 2 ting ting  4096 Nov 12 21:23 ./
drwxrwxr-x 7 ting ting  4096 Nov 12 21:23 ../
-rw-rw-r-- 1 ting ting   788 Nov 12 21:23 Android.mk
-rw-rw-r-- 1 ting ting     0 Nov 12 21:23 MODULE_LICENSE_APACHE2
-rw-rw-r-- 1 ting ting 10695 Nov 12 21:23 NOTICE
-rw-rw-r-- 1 ting ting  7101 Nov 12 21:23 rild.c
-rw-rw-r-- 1 ting ting   191 Nov 12 21:23 rild.legacy.rc
-rw-rw-r-- 1 ting ting   198 Nov 12 21:23 rild.rc

ting@ting-pc:~/aosp/android-9/hardware/ril/rild$ cat rild.rc
service vendor.ril-daemon /vendor/bin/hw/rild
    class main
    user radio
    disabled
    group radio cache inet misc audio log readproc wakelock
    capabilities BLOCK_SUSPEND NET_ADMIN NET_RAW

ting@ting-pc:~/aosp/android-9/hardware/ril/rild
$ cat rild.c

int main(int argc, char **argv) {
    // vendor ril lib path either passed in as -l parameter, or read from rild.libpath property
    const char *rilLibPath = NULL;
    // ril arguments either passed in as -- parameter, or read from rild.libargs property
    char **rilArgv;

	...

    // ril/socket id received as -c parameter, otherwise set to 0
    const char *clientId = NULL;

    RLOGD("**RIL Daemon Started**");
    RLOGD("**RILd param count=%d**", argc);

	...

    dlHandle = dlopen(rilLibPath, RTLD_NOW);	// indicate to Vendor RIL, libreference-ril.so

libreference-ril.so

The Vendor RIL is specific to a particular radio implementation, and dispatches "unsolicited commands" up to the RIL Daemon.

Modem module vendor needs to implement this shared library that coding modem specific AT commands.

ting@ting-pc:~/aosp/android-9/hardware/ril/reference-ril
$ ls -al
total 198
drwxr-xr-x 1 ting 197121      0 十二月 25 17:52 ./
drwxr-xr-x 1 ting 197121      0 十二月 25 17:52 ../
-rw-r--r-- 1 ting 197121   1157 十二月 25 17:52 Android.mk
-rw-r--r-- 1 ting 197121   3850 十二月 25 17:52 at_tok.c
-rw-r--r-- 1 ting 197121   1004 十二月 25 17:52 at_tok.h
-rw-r--r-- 1 ting 197121  24710 十二月 25 17:52 atchannel.c
-rw-r--r-- 1 ting 197121   4381 十二月 25 17:52 atchannel.h
-rw-r--r-- 1 ting 197121   1309 十二月 25 17:52 misc.c
-rw-r--r-- 1 ting 197121    904 十二月 25 17:52 misc.h
-rw-r--r-- 1 ting 197121      0 十二月 25 17:52 MODULE_LICENSE_APACHE2
-rw-r--r-- 1 ting 197121  10885 十二月 25 17:52 NOTICE
-rw-r--r-- 1 ting 197121    177 十二月 25 17:52 OWNERS
-rw-r--r-- 1 ting 197121 122720 十二月 25 17:52 reference-ril.c
-rw-r--r-- 1 ting 197121     26 十二月 25 17:52 ril.h

ting@ting-pc:~/aosp/android-9/hardware/ril/reference-ril
$ cat reference-ril.c

static void requestSignalStrength(void *data __unused, size_t datalen __unused, RIL_Token t)
{
    ATResponse *p_response = NULL;
    int err;
    char *line;
    int count = 0;
    // Accept a response that is at least v6, and up to v10
    int minNumOfElements=sizeof(RIL_SignalStrength_v6)/sizeof(int);
    int maxNumOfElements=sizeof(RIL_SignalStrength_v10)/sizeof(int);
    int response[maxNumOfElements];

    memset(response, 0, sizeof(response));

    err = at_send_command_singleline("AT+CSQ", "+CSQ:", &p_response);

    if (err < 0 || p_response->success == 0) {
        RIL_onRequestComplete(t, RIL_E_GENERIC_FAILURE, NULL, 0);
        goto error;
    }

    line = p_response->p_intermediates->line;

    err = at_tok_start(&line);
    if (err < 0) goto error;

    for (count = 0; count < maxNumOfElements; count++) {
        err = at_tok_nextint(&line, &(response[count]));
        if (err < 0 && count < minNumOfElements) goto error;
    }

    RIL_onRequestComplete(t, RIL_E_SUCCESS, response, sizeof(response));

    at_response_free(p_response);
    return;

error:
    RLOGE("requestSignalStrength must never return an error when radio is on");
    RIL_onRequestComplete(t, RIL_E_GENERIC_FAILURE, NULL, 0);
    at_response_free(p_response);
}

libril.so

The library of rild that implement Radio HIDL service, e.g. android::hardware::radio::V1_1::IRadio.

ting@ting-pc:~/aosp/android-9/hardware/ril/libril
$ ls -al
total 560
drwxr-xr-x 1 ting 197121      0 十二月 25 17:52 ./
drwxr-xr-x 1 ting 197121      0 十二月 25 17:52 ../
-rw-r--r-- 1 ting 197121   1138 十二月 25 17:52 Android.mk
-rw-r--r-- 1 ting 197121      0 十二月 25 17:52 MODULE_LICENSE_APACHE2
-rw-r--r-- 1 ting 197121  10885 十二月 25 17:52 NOTICE
-rw-r--r-- 1 ting 197121  49496 十二月 25 17:52 ril.cpp
-rw-r--r-- 1 ting 197121  11316 十二月 25 17:52 ril_commands.h
-rw-r--r-- 1 ting 197121  10484 十二月 25 17:52 ril_event.cpp
-rw-r--r-- 1 ting 197121   1517 十二月 25 17:52 ril_event.h
-rw-r--r-- 1 ting 197121   3112 十二月 25 17:52 ril_internal.h
-rw-r--r-- 1 ting 197121 343787 十二月 25 17:52 ril_service.cpp
-rw-r--r-- 1 ting 197121  34538 十二月 25 17:52 ril_service.h
-rw-r--r-- 1 ting 197121   4791 十二月 25 17:52 ril_unsol_commands.h
-rw-r--r-- 1 ting 197121   8980 十二月 25 17:52 RilSapSocket.cpp
-rw-r--r-- 1 ting 197121   6491 十二月 25 17:52 RilSapSocket.h
-rw-r--r-- 1 ting 197121   1714 十二月 25 17:52 RilSocket.h
-rw-r--r-- 1 ting 197121   3906 十二月 25 17:52 rilSocketQueue.h
-rw-r--r-- 1 ting 197121  39253 十二月 25 17:52 sap_service.cpp
-rw-r--r-- 1 ting 197121   1093 十二月 25 17:52 sap_service.h

// impl. of android::hardware::radio::V1_1::IRadio

ting@ting-pc:~/aosp/android-9/hardware/ril/libril
$ cat ril_service.cpp

struct RadioImpl : public V1_1::IRadio {
    int32_t mSlotId;
    sp<IRadioResponse> mRadioResponse;
    sp<IRadioIndication> mRadioIndication;
    sp<V1_1::IRadioResponse> mRadioResponseV1_1;
    sp<V1_1::IRadioIndication> mRadioIndicationV1_1;

    Return<void> setResponseFunctions(
            const ::android::sp<IRadioResponse>& radioResponse,
            const ::android::sp<IRadioIndication>& radioIndication);

    Return<void> getIccCardStatus(int32_t serial);
    ...

Stop/Start RIL daemon

Usually it needs to stop ril daemon before testing AT command with modem module

setprop ctl.start vendor.ril-daemon

setprop ctl.stop vendor.ril-daemon

Runtime @ device

console:/vendor # find | grep -w "rild"
	./etc/init/rild.rc
	./bin/hw/rild

		console:/vendor # cat ./etc/init/rild.rc
		service vendor.ril-daemon /vendor/bin/hw/rild -l /vendor/lib64/libreference-ril.so
			class main
			user radio
			group radio cache inet misc audio sdcard_rw log readproc wakelock
			capabilities BLOCK_SUSPEND NET_ADMIN NET_RAW
		console:/vendor #


console:/vendor # find | grep -w "ril.so"
	./lib64/libreference-ril.so


console:/ # getprop | grep -i -E "ril|radio"

	[gsm.version.ril-impl]: [Quectel_Android_RIL_Driver_V3.1.8]
	[init.svc.vendor.ril-daemon]: [running]
	[persist.radio.multisim.config]: [ssss]
	[persist.rild.nitz_long_ons_0]: []
	[persist.rild.nitz_long_ons_1]: []
	[persist.rild.nitz_long_ons_2]: []
	[persist.rild.nitz_long_ons_3]: []
	[persist.rild.nitz_plmn]: []
	[persist.rild.nitz_short_ons_0]: []
	[persist.rild.nitz_short_ons_1]: []
	[persist.rild.nitz_short_ons_2]: []
	[persist.rild.nitz_short_ons_3]: []
	[persist.vendor.radio.apm_sim_not_pwdn]: [1]
	[persist.vendor.radio.atfwd.start]: [false]
	[persist.vendor.radio.custom_ecc]: [1]
	[persist.vendor.radio.rat_on]: [combine]
	[persist.vendor.radio.sib16_support]: [1]
	[ril.subscription.types]: [NV,RUIM]
	[rild.libargs]: [-d /dev/ttyUSB2]
	[rild.libpath]: [/vendor/lib64/libreference-ril.so]
	[ro.boottime.vendor.ril-daemon]: [17157893326]
	[vendor.rild.libpath]: [/vendor/lib64/libreference-ril.so]


console:/ # ps -A | grep -E -i "radio|ril"

    system         559     1   16180   4824 binder_thread_read  0 S android.hardware.radio.config@1.0-service
    radio         1312     1 2132928   6752 binder_thread_read  0 S rild
    radio         1321     1    5084   1868 __skb_wait_for_more_packets 0 S ssgqmigd
    radio         1526     1   22500   5368 futex_wait_queue_me 0 S ipacm
    radio         2003  1259 3712124  84148 SyS_epoll_wait      0 S com.qualcomm.qti.telephonyservice
    radio         3065  1259 3699680  77996 SyS_epoll_wait      0 S com.qualcomm.qcrilmsgtunnel
    radio         4375  1259 3695368  78876 SyS_epoll_wait      0 S com.qualcomm.qti.lpa
    radio         4390  1259 3697792  81464 SyS_epoll_wait      0 S com.qualcomm.qti.modemtestmode
    radio         4442  1259 3698524  80652 SyS_epoll_wait      0 S com.qualcomm.simcontacts
    radio         5480  1259 3714564  95160 futex_wait_queue_me 0 S com.android.phone

☛ 無線介面層 - 維基百科，自由的百科全書

Modem Device Node, Driver Node

Take modem module Quectel EC25 for example, it's the USB serial device.

console:/ #  ls -l /dev/ttyUSB*

	crw-rw---- 1 radio radio 188,   0 1970-01-01 00:00 /dev/ttyUSB0
	crw-rw---- 1 radio radio 188,   1 1970-01-01 00:00 /dev/ttyUSB1
	crw-rw---- 1 radio radio 188,   2 2020-12-02 09:59 /dev/ttyUSB2
	crw-rw---- 1 radio radio 188,   3 1970-01-01 00:00 /dev/ttyUSB3

ls -al /sys/bus/usb/drivers

	drwxr-xr-x 32 root root 0 2020-12-07 08:06 .
	drwxr-xr-x  4 root root 0 1970-01-01 00:00 ..
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 asix
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ax88179_178a
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 cdc_ether
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 cdc_ncm
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 cdc_subset
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 cdc_wdm
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 hub
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 lvs
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 net1080
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 option
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 qmi_wwan_q
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 snd-usb-audio
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-alauda
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-cypress
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-datafab
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-freecom
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-isd200
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-jumpshot
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-karma
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-onetouch
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-sddr09
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-sddr55
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 ums-usbat
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usb
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usb-storage
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usb_ehset_test
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usbfs
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usbhid
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 usbserial
	drwxr-xr-x  2 root root 0 2020-12-07 08:06 zaurus

Use case of AT command

console:/ #

	cat /dev/ttyUSB2 &

	echo "ati;+csub" > /dev/ttyUSB2

	echo -e 'AT+CPIN?\r\n' > /dev/ttyUSB2

	echo -e 'at+qsimdet=1,0\r\n' > /dev/ttyUSB2
	echo -e 'AT+QSIMDET=?\r\n' > /dev/ttyUSB2
	echo -e 'AT+QSIMDET?\r\n' > /dev/ttyUSB2

	echo -e 'AT+QSIMSTAT=1\r\n' > /dev/ttyUSB2
	echo -e 'AT+QSIMSTAT=?\r\n' > /dev/ttyUSB2
	echo -e 'AT+QSIMSTAT?\r\n' > /dev/ttyUSB2

Glossary

Telephony 术语缩写 Acronyms

Appendix

中華電信 mcc/mnc 466/92

restart zygote

setprop ctl.stop zygote
setprop ctl.start zygote

Ref. LTE 4G module Quectel EC25-E, based on AOSP Android 9 / Android 10

More porting cases :

5G module Fibocom FM150-AE on Android 10
5G module Quectel RM500Q-AE PCI-E interface on Android 11

Name		Name	Last commit message	Last commit date
Latest commit History 26 Commits
compatibility_matrix.5.xml requires IRadio1.4		compatibility_matrix.5.xml requires IRadio1.4
res		res
.gitignore		.gitignore
Fibocom FM150-AE.md		Fibocom FM150-AE.md
Quectel RM500Q-AE.md		Quectel RM500Q-AE.md
README.md		README.md

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Overview

Telephony App/Service

Telephony Provider

Telephony Framework

Radio HIDL

RIL Daemon

Stop/Start RIL daemon

Runtime @ device

Modem Device Node, Driver Node

Use case of AT command

Glossary

Appendix

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Telephony Provider

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Stop/Start RIL daemon

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Glossary

Appendix

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