AM335x 添加 HUAWEI MU609 Mini PCIe Module，并用pppd 启动相关设备

• kernel 的配置

    kernel 3.2.0
    make menuconfig
    Device Drivers  --->
        [*] USB support  --->
            <*>   USB Serial Converter support  --->
                <*>   USB driver for GSM and CDMA modems

    kernel 3.2.0
    make menuconfig
        Device Drivers  --->
            [*] Network device support  --->
                // 将这里面所有的ppp 的支持多选上
            
                  USB Network Adapters  --->
                        < >   CDC Ethernet support (smart devices such as cable modems)
                        < >   CDC EEM support
                        < >   CDC NCM support

    kernel 3.2.0
    vim drivers/usb/serial/option.c
     #define HUAWEI_PRODUCT_E353         0x1573
    // 这个宏改为 0x1573

    // 重新编译
    // 将模块插好

• buildroot 的配置

    make menuconfig
        Target packages  --->
            Networking applications  --->
                [*] pppd 
                [ ]   filtering
                [*]   radius 

• pppd 启动脚本的配置

    // 在文件系统的 /etc 目录下，创建 ppp 目录
    // 在 /etc/ppp 目录下创建 peers 目录

    #     vim  /etc/ppp/peers/gprs
    #/etc/ppp/peers/gprs
    # This is pppd script for China Mobile, used GPRS Module
    # Usage:   root>pppd call gprs
    /dev/ttyUSB0    
    115200          
    nocrtscts      
    modem
    #noauth        
    debug
    #nodetach
    #hide-password
    usepeerdns
    noipdefault
    defaultroute
    user "cmnet"   
    0.0.0.0:0.0.0.0 
    ipcp-accept-local
    #ipcp-accept-remote
    #lcp-echo-failure  12
    #lcp-echo-interval 3
    #noccp
    #novj
    #novjccomp
    #persist
    #connect '/usr/sbin/chat -s -v -f /etc/ppp/gprs-connect-chat'
    connect '/usr/sbin/chat -v -s -f /etc/ppp/gprs-connect-chat'
    #disconnect '/bin/chat -v -f /etc/ppp/gprs-disconnect-chat'

    # vim  etc/ppp/chap-secrets
    # Secrets for authentication using CHAP
    # client    server  secret          IP addresses
    "cmnet"    *     "cmnet"    *   

    # vim etc/ppp/gprs-connect-chat
    #/etc/ppp/gprs-connect-chat
    #    chat script for China Mobile, used GPRS module.
    TIMEOUT         15  
    ABORT           "DELAYED"
    ABORT           "BUSY"
    ABORT           "ERROR"
    ABORT           "NO DIALTONE"
    ABORT           "NO CARRIER"
    TIMEOUT         40  
    ''              AT  
    OK              ATS0=0
    OK              ATE0V1
    OK      AT+CGDCONT=1,"IP","CMNET"
    OK              ATDT*99***1#
    CONNECT         ''  

• 启动pppd 服务器

    pppd call gprs &

• 查看启动后的网络文件节点