飛思卡爾i.MX 6Quad Android 4.0.4的3G驅動移植

 

1      概述

平台：freescale i.MX 6Quad 4核開發板Sabrelite

作業系統：Android 4.0.4

核心：3.0.15

3G模組：中興MG3732和UbloxLISA-U130

 

2      中興MG3732模組移植2.1    準備

準備一張可用的聯通3G卡，放入SIM卡卡槽，接著把中興MG3732開發板通過usb串連到主板上。

 

2.2    移植步驟

1）  拷貝libztewcdma-ril.so檔案到 /system/lib目錄下

2）  在/driver/usb/serial/option.c中添加pid,vid如下：

                   {USB_DEVICE(0x19d2, 0xffff) },                   {USB_DEVICE(0x19d2, 0xfffe) },                   {USB_DEVICE(0x19d2, 0xfffd) },                   {USB_DEVICE(0x19d2, 0xfffc) },                   {USB_DEVICE(0x19d2, 0xfffb) },                   {USB_DEVICE(0x19d2, 0xfff1) },                   {USB_DEVICE(0x19d2, 0xfff6) },                   {USB_DEVICE(0x19d2, 0xfff7) },                   {USB_DEVICE(0x19d2, 0xfff8) },                   {USB_DEVICE(0x19d2, 0xfff9) },                   {USB_DEVICE(0x19d2, 0xffee) },                   {USB_DEVICE(0x19d2, 0xffed) },                   {USB_DEVICE(0x19d2, 0xffeb) },                   {USB_DEVICE(0x19d2, 0xffec) },

3）  拷貝chat, pppd到/system/bin目錄下，確保/system/bin 目前下有pppd 和chat 兩個程式，且可以運行

4）  添加ip-up到/system/ppp/目錄下

5）  在init.rc檔案中添加

 

chmod 0755 /system/lib/libztewcdma-ril.sochown root /system/bin/pppdchmod 4755 /system/bin/pppd  service ril-daemon /system/bin/rild -l/system/lib/libztewcdma-ril.so -- -d /dev/ttyUSB0socket rild stream 660 root radiosocket rild-debug stream 660 radio systemuser root group radio cache inet misc

6）  配置menuconfig如下：

 

[*] Network device support  --->        <*>   PPP (point-to-point protocol) support        [*]     PPP multilink support (EXPERIMENTAL)        [*]     PPP filtering        <*>     PPP support for async serial ports        <*>     PPP support for sync tty ports        <*>     PPP Deflate compression        <*>     PPP BSD-Compress compression        <*>     PPP MPPE compression (encryption)(EXPERIMENTAL)        <*>     PPP over Ethernet (EXPERIMENTAL)        <*>     PPP over L2TP (EXPERIMENTAL)

2.3    調試過程

1、  進入android系統後，首先查看模組的連接埠是否識別，如果能正確識別的話，可以看到以下4個連接埠：

/dev/ttyUSB0/dev/ttyUSB1/dev/ttyUSB2/dev/ttyUSB3

2、  注意設定ril-daemon的連接埠為/dev/ttyUSB0，否則rild進程無法啟動，在

logcat –b radio中會顯示以下錯誤：

I/RILJ   ( 2392): Couldn't find 'rild' socket; retrying after timeoutI/RILJ    ( 2392): Couldn't find'rild' socket; retrying after timeoutI/RILJ    ( 2392): Couldn't find'rild' socket; retrying after timeoutI/RILJ    ( 2392): Couldn't find'rild' socket; retrying after timeoutI/RILJ    ( 2392): Couldn't find'rild' socket; retrying after timeout

3、  在調試過程中，模組可以撥打到電話，但無法上網，用ps命令未發現pppd進程，log如下：

D/RILJ    ( 2369): 0: [77] SETUP_DATA_CALL E/RILD    ( 2135): get exit sig 17 E/RILD    ( 2135): checkPPPConnection: pid_exit == 1 E/RILD    ( 2135): checkPPPConnection: interface[ppp0]information is not found E/RILD    ( 2135): start_pppd:   failed to check PPP interfaceUP E/RILD    ( 2135): EVENT_PPPD_MANAGER_PPPD_EXIT E/RILD    ( 2135): pppd exit. status = 1024 E/RILD    ( 2135): pppd exit . no restart pppd . E/RILD    ( 2135): SetupDefaultPDP failed. 

說明pppd進程啟動失敗。

後發現是pppd許可權問題導致，解決方案如下：

啟動系統後，在adb中執行以下命令修改pppd許可權：

chown root /system/bin/pppdchmod 4755 /system/bin/pppd

若系統是唯讀屬性，需用remount命令重新掛載檔案系統：

mount –o remount,rw/dev/block/mmcblk0p5 /system/

3      ublox LISA-U130模組移植3.1    準備

準備一張可用的聯通3G卡，放入SIM卡卡槽，接著把ublox u130開發板通過usb串連到主板上。

3.2    移植步驟

1）  解壓ublox提供的壓縮檔如下：

RIL_sc_<version>.zipril_sc_<version>                                Source overlay for Android Platform       build/target/product                     Device configuration folder files       external/ppp/                            Data connection files        hardware/gsm0710muxd                    Channelmultiplexer       hardware/ril/ublox_ril/                  RIL core directory       system/core/rootdir/Android.mk           Compilation script       system/core/init/property_service.c      Set RIL services property       system/core/liblog/logd_write.c          Log configuration files

2）  把相關檔案拷貝到android源碼中

cp –pvRf ril_sc_<version>/external/ppp/ <android_root>/external/pppcp –pvRf ril_sc_<version>/hardware/ril/ublox_ril <android_root>/hardware/ril/cp –pvRf ril_sc_<version>/system/* <android_root>/systemcp –pvRfril_sc_<version>/build/* <android_root>/build

3）  在device/fsl/imx6/AndroidProducts.mk中添加：

RIL_COM_INTERFACE := usb

4）  在init.rc檔案中添加如下語句：

       # Changepermissions for modem           chmod 0660 /dev/ttyACM0           chown radio radio /dev/ttyACM0           chmod 0660 /dev/ttyACM1           chown radio radio /dev/ttyACM1           chmod 0660 /dev/ttyACM2           chown radio radio /dev/ttyACM2       # Set permissions for u-blox RILRepository           chown radio radio /system/etc/rril           chmod 0770 /system/etc/rril           chown radio radio/system/etc/rril/repository.txt           chmod 0660/system/etc/rril/repository.txt       # Set u-blox RIL repository state           setprop net.rril.repository notready       #Prepare u-blox RIL repository      service rril-repo/system/bin/rril-repo.sh           user root           group radio           oneshot       # Load u-blox RIL      service ril-daemon /system/bin/rild -l/system/lib/librapid-ril-core.so --      -a /dev/ttyACM0 -n /dev/ttyACM1           class main           socket rild stream 660 root radio           socket rild-debug stream 660 radiosystem                 user root           group radio cache inet misc audio       service pppd_data0/system/bin/init.gprs-pppd           user root radio           group radio cache inet misc           disabled           oneshot       service pppd_data1/system/bin/init.gprs-pppd           user root radio           group radio cache inet misc           disabled           oneshot       service pppd_term /system/bin/stop_pppd15           class main           disabled           oneshot       service pppd_kill /system/bin/stop_pppd 9           class main           disabled           oneshot

5）  配置menuconfig如下：

DeviceDrivers          USB Support              <*>USB Modem (CDC ACM)support DeviceDrivers          Network device support              <*>PPP (point-to-pointprotocol) support              <*>PPP support for asyncserial ports              <*>PPP support for sync ttyports                     <*>PPP Deflate compression

6）  重新編譯系統，確保產生以下檔案

/system/lib/librapid-ril-core.so/system/lib/librapid-ril-util.so/system/lib/librapid-ril-oem.so /system/bin/pppd/system/bin/chat /system/bin/init.gprs-pppd/system/bin/ip-down/system/bin/ip-up/system/bin/stop_pppd/system/bin/rril-repo.sh /system/etc/rril/repository.txt /system/etc/ppp/ chap-secrets/system/etc/ppp/ chat-isp1/system/etc/ppp/ chat-isp2/system/etc/ppp/ ip-down-ppp0/system/etc/ppp/ ip-up-ppp0/system/etc/ppp/ ip-up-vpn/system/etc/ppp/pap-secrets /system/etc/ppp/peers/gprs1/system/etc/ppp/peers/gprs2 

3.3    調試過程

1、  啟動系統後，確保3G模組連接埠可以被系統識別：

/dev/ttyACM0/dev/ttyACM1/dev/ttyACM2/dev/ttyACM3/dev/ttyACM4/dev/ttyACM5

2、  用ps命令查看rild進程是否啟動，如果已啟動，此時一般撥打到電話是沒問題的。

3、  在調試過程中發現不能上網，用ps命令查看，發現pppd進程未啟動。在adb中用logcat –b radio查看日誌發現有兩處錯誤：

 

第一處錯誤：

E/RILR    ( 2109):CRepository::OpenRepositoryFile() - ERROR: Could not open file"/data/rril/repository.txt" - No such file or directory

第二處錯誤：

I/pppd.gprs( 3262): Configure pppd securityoptions I/pppd.start( 3271): Starting pppd E/pppd    ( 3272): unrecognizedoption 'gprs1'I/pppd.start( 3279): pppd exited with2 

第一處錯誤could not find /data/rril/repository.txt的原因是/system/bin/rril-repo.sh指令碼未得到執行，解決方案是修改/system/bin/rril-repo.sh的許可權，以及在init.rc中添加servicerril-repo的class屬性：

# Prepare u-blox RIL repositoryservice rril-repo /system/bin/rril-repo.shclass mainuser rootgroup radiooneshot

第二處錯誤unrecognizedoption 'gprs1'的原因是執行/system/bin/init.gprs-pppd指令碼時出錯，當$ppp_usr為空白字串時，指令碼執行以下語句：

/system/bin/pppd user $ppp_usr call gprs$(( $ppp_if + 1 ))=》/system/bin/pppd user call gprs1

此語句執行失敗，所以pppd進程無法啟動。

 

 

修改後的正確的指令碼為：

case $ppp_auth in 0) /system/bin/log -t pppd.start "/system/bin/pppd call gprs$(( $ppp_if+ 1 ))"/system/bin/pppd call gprs$(( $ppp_if + 1 )) ;; *)  if [ "$ppp_usr" = "" ];then/system/bin/log -t pppd.start "/system/bin/pppd call gprs$(( $ppp_if+ 1 ))"/system/bin/pppd call gprs$(( $ppp_if + 1 )) else/system/bin/log -t pppd.start "/system/bin/pppd user $ppp_usr callgprs$(( $ppp_if + 1 ))"/system/bin/pppd user $ppp_usr call gprs$(( $ppp_if + 1 )) fi