How to implement new rild to support an external modem in Android N.

[Eric Zhuang]

Hi all,

   Now i have a project which will use Qualcomm modem + thirdparty modem. That's means i need implement another rild to communicate with third party modem.

Do you guys have any idea how to make it?

1. Add another service in Rild.rc like below? Then rild.c->main() will run two times to load different library?

service ril-daemon /system/bin/rild -l /system/vendor/lib/libril-qc-qmi-1.so -- -d /dev/smd0

    class main

    socket rild stream 660 root radio

  socket sap_uim_socket1 stream 660 bluetooth bluetooth

    socket rild-debug stream 660 radio system

    user root

    group radio cache inet misc audio sdcard_r sdcard_rw qcom_diag log

service ril-daemon /system/bin/rild -c 2 -l /system/vendor/lib/libril-thirdparty.so -- -d /dev/xxxx

    class main

    socket rild2 stream 660 root radio

    socket rild-debug2 stream 660 radio system

    user root

    group radio cache inet misc audio log readproc wakelock

2. Do i need add an extra s_callbacks in ril.cpp?  Since rilInit() load different RIL_RadioFunctions.

Any suggestions are appreciate. Thanks!