Android 4G驱动移植流程

1. Linux Kernel Configure by "make menuconfig" 1.1 USB Driver Configure for L506 Device Drivers ---> [*] USB support ---> <*> USB Serial Converter support [*] USB Generic Serail Driver [*] USB Driver for GSM and CMDA modems 1.2 USB Driver Configure for UG95/UG96 Device Drivers ---> [*] USB support ---> <*> USB Modem (CDC ACM) support 1.3 PPP Configure Device Drivers ---> [*] Network device support ---> <*> PPP (point-to-point protocol) support <*> PPP support for async serial ports <*> PPP support for sync tty ports <*> PPP Deflate compression 2.Add PID and VID drivers/usb/serial/option.c static const struct usb_device_id option_ids[] = { { USB_DEVICE(0xxxx, 0xxxxx) }, 3. init.rc Configure add service ril-daemon and service popped in init.rc, as below: service ril-daemon /system/bin/rild -l /system/lib/libreference-ril.so class main socket 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.rc device/fsl/imx6/init.rc device/ti/am335xevm_sk/init.am335xevm.rc device/generic/x86/init.rc device/samsung/smdkv210/init.rc 3. modifying the Right of service ril-daemon serivce 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。