飞思卡尔i.MX 6Quad Android 4.0.4的3G驱动移植

最新推荐文章于 2021-05-29 22:57:09 发布

xnwyd

最新推荐文章于 2021-05-29 22:57:09 发布

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分类专栏： Android Linux C/C++

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本文详细介绍了如何在飞思卡尔i.MX 6Quad开发板上，针对Android 4.0.4系统进行3G模块的移植工作，包括中兴MG3732和ublox LISA-U130的移植步骤，涉及驱动安装、配置以及调试过程。

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1 概述

平台：freescale i.MX 6Quad 4核开发板Sabrelite

操作系统：Android 4.0.4

内核：3.0.15

3G模块：中兴MG3732和UbloxLISA-U130

2 中兴MG3732模块移植

2.1 准备

准备一张可用的联通3G卡，放入SIM卡卡槽，接着把中兴MG3732开发板通过usb连接到主板上。

2.2 移植步骤

1）拷贝libztewcdma-ril.so文件到 /system/lib目录下

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）拷贝chat, pppd到/system/bin目录下，确保/system/bin 目前下有pppd 和chat 两个程序，且可以运行

4）添加ip-up到/system/etc/ppp/目录下

5）在init.rc文件中添加

chmod 0755 /system/lib/libztewcdma-ril.so
chown root /system/bin/pppd
chmod 4755 /system/bin/pppd
 
 
service ril-daemon /system/bin/rild -l/system/lib/libztewcdma-ril.so -- -d /dev/ttyUSB0
socket rild stream 660 root radio
socket rild-debug stream 660 radio system
user 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 调试过程

1、进入android系统后，首先查看模块的端口是否识别，如果能正确识别的话，可以看到以下4个端口：

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

2、注意设置ril-daemon的端口为/dev/ttyUSB0，否则rild进程无法启动，在

logcat –b radio中会显示以下错误：

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

3、在调试过程中，模块可以拨打电话，但无法上网，用ps命令未发现pppd进程，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.

说明pppd进程启动失败。

后发现是pppd权限问题导致，解决方法如下：

启动系统后，在adb中执行以下命令修改pppd权限：

chown root /system/bin/pppd
chmod 4755 /system/bin/pppd

若系统是只读属性，需用remount命令重新挂载文件系统：

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

3 ublox LISA-U130模块移植

3.1 准备

准备一张可用的联通3G卡，放入SIM卡卡槽，接着把ublox u130开发板通过usb连接到主板上。

3.2 移植步骤

1）解压ublox提供的压缩文件如下：

RIL_sc_<version>.zip
ril_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）把相关文件拷贝到android源码中

cp –pvRf ril_sc_<version>/external/ppp/ <android_root>/external/ppp
cp –pvRf ril_sc_<version>/hardware/ril/ublox_ril <android_root>/hardware/ril/
cp –pvRf ril_sc_<version>/system/* <android_root>/system
cp –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文件中添加如下语句：

       # 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）重新编译系统，确保生成以下文件

/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 调试过程

1、启动系统后，确保3G模块端口可以被系统识别：

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

2、用ps命令查看rild进程是否启动，如果已启动，此时一般拨打电话是没问题的。

3、在调试过程中发现不能上网，用ps命令查看，发现pppd进程未启动。在adb中用logcat –b radio查看日志发现有两处错误：

第一处错误：

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

第二处错误：

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

第一处错误could not find /data/rril/repository.txt的原因是/system/bin/rril-repo.sh脚本未得到执行，解决方法是修改/system/bin/rril-repo.sh的权限，以及在init.rc中添加servicerril-repo的class属性：

# Prepare u-blox RIL repository
service rril-repo /system/bin/rril-repo.sh
class main
user root
group radio
oneshot

第二处错误unrecognizedoption 'gprs1'的原因是执行/system/bin/init.gprs-pppd脚本时出错，当$ppp_usr为空字符串时，脚本执行以下语句：

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

此语句执行失败，所以pppd进程无法启动。

修改后的正确的脚本为：

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