Android 4G驱动移植流程

1. Linux Kernel Configure by "make menuconfig"1.1 USB Driver Configure for L506Device Drivers --->[*] USB support ---><*> USB Serial Converter support[*] USB Generic Serail Driver[*] USB Driver for GSM and CMDA modems1.2 USB Driver Configure for UG95/UG96Device Drivers --->[*] USB support ---><*> USB Modem (CDC ACM) support1.3 PPP ConfigureDevice Drivers --->[*] Network device support ---><*> PPP (point-to-point protocol) support<*> PPP support for async serial ports<*> PPP support for sync tty ports<*> PPP Deflate compression2.Add PID and VIDdrivers/usb/serial/option.cstatic const struct usb_device_id option_ids[] = {{ USB_DEVICE(0xxxx, 0xxxxx) },3. init.rc Configureadd service ril-daemon and service popped in init.rc, as below:service ril-daemon /system/bin/rild -l /system/lib/libreference-ril.soclass mainsocket rild stream 660 root radio socket rild-debug stream 666 radio system user root group radio cache inet misc audio sdcard_rw log
the init.rc 's location depend on your project, for example:system/core/rootdir/init.rcdevice/fsl/imx6/init.rcdevice/ti/am335xevm_sk/init.am335xevm.rcdevice/generic/x86/init.rcdevice/samsung/smdkv210/init.rc3. modifying the Right of service ril-daemonserivce ril-daemon require root privilege. comment out the function switchUser() in the file hardware/ril/rild/rild.c. as below:OpenLib:#endif//switchUser();note：64位的系统libreference-ril.so 需要放在lib64下，所以需要作出相应的更改4.把4G模块对应的libreference-ril.so文件替换到lib文件里5.添加APN，把需要的APN添加到system/etc/apns-conf.xml里6.更改模式，打开Android/frameworks/base/telephony/java/con/android/internal/telephony/RILConstants.java找到int PREFERRED_NETWORK_MODE=********；根据自己的需要选择模式，最后编译就可以了。

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