硬件平台：MT7628A
openwrt版本：MTK_SDK
/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.180/drivers/usb/serial/option.c
在源码中找到option_ids数组， 添加模组VID、PID: 0x1c9e、 0x9b3c
/* 4G Systems products */ /* This is the 4G XS Stick W14 a.k.a. Mobilcom Debitel Surf-Stick * * It seems to contain a Qualcomm QSC6240/6290 chipset */ #define FOUR_G_SYSTEMS_PRODUCT_W14 0x9603 #define FOUR_G_SYSTEMS_PRODUCT_W100 0x9b01 /* Fujisoft products */ #define FUJISOFT_PRODUCT_FS040U 0x9b02 /* iBall 3.5G connect wireless modem */ #define IBALL_3_5G_CONNECT 0x9605 /* Zoom */ #define ZOOM_PRODUCT_4597 0x9607 /* SpeedUp SU9800 usb 3g modem */ #define SPEEDUP_PRODUCT_SU9800 0x9800 /*U9300*/
#define LONGSUNG_VENDOR_ID 0x1c9e
#define LONGSUNG_U9300_PRODUCT_ID 0x9b3c
添加该id到数组，过滤 interface 4
{ USB_DEVICE_INTERFACE_CLASS(LONGSUNG_VENDOR_ID, SPEEDUP_PRODUCT_SU9800, 0xff) },
{ USB_DEVICE_INTERFACE_CLASS(LONGSUNG_VENDOR_ID, LONGSUNG_U9300_PRODUCT_ID, 0xff),
.driver_info = RSVD(4) },
{ USB_DEVICE_INTERFACE_CLASS(LONGSUNG_VENDOR_ID, 0x9801, 0xff),
在 /drivers/network/usb/qmiw_wan.c文件添加 VID
Base system --> udev
Kernel modules --> USB Support --> kmod-usb-acm kmod-usb-net kmod-usb-net kmod-usb-net kmod-usb-net-qmi-wwan kmod-usb-ohci kmod-usb-serial kmod-usb-serial-option
LuCI ---> Protocols ---> luci-proto-3g luci-proto-qmi
Network ---> uqmi
Utilities ---> usb-modeswitch usbutils
device drivers ---> usb support --->usb serial converter support--->USB driver for GSM and CDMA modems
device drivers--->Network device support--->usb Network Adapters--->Multi-purpose USB Networking Framework
build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.18.84/arch/mips/include/uapi/asm/errno.h
#define ENOMSG 42
编译后, 添加成功 及 驱动正常 会在 /dev/ 目录下生成 ttyUSB0 -- ttyUSB4 5个端口
3、编译龙尚gobinet驱动
将官方驱动解压到 package/gobinet/src/，在package/gobinet 目录下新建 makefile 文件，内容如下：
include $(TOPDIR)/rules.mk include $(INCLUDE_DIR)/kernel.mk PKG_NAME:=gobinet PKG_RELEASE:=1 include $(INCLUDE_DIR)/package.mk define KernelPackage/gobinet SUBMENU:=Other modules TITLE:=Support Module for gobinet DEPENDS:=+kmod-usb-core +kmod-usb-net FILES:=$(PKG_BUILD_DIR)/GobiNet.ko AUTOLOAD:=$(call AutoLoad,81,GobiNet) endef define KernelPackage/gobinet/description This is a gobinet drivers endef MAKE_OPTS:=ARCH="$(LINUX_KARCH)" CROSS_COMPILE="$(TARGET_CROSS)" SUBDIRS="$(PKG_BUILD_DIR)" define Build/Prepare mkdir -p $(PKG_BUILD_DIR)/ $(CP) -R ./src/* $(PKG_BUILD_DIR)/ endef define Build/Compile $(MAKE) -C "$(LINUX_DIR)" $(MAKE_OPTS) modules endef $(eval $(call KernelPackage,gobinet))
在menuconfig 中将该驱动编译进内核 kernel modules -> Other modules -> kmod-gobinet
编译刷机后查看是否出现新的网卡eth0或者eth1
4、查看模块状态，拨号上网(安装minicom，选择ttyUSB2)
minicom操作：
查询APN AT+CGDCONT? 配置APN AT+CGDCONT=1,"IP","CTNET" CTNET(电信) CMNET(移动) 3GNET（联通） APN一般模块可以自动识别，无需配置
拨号上网 AT$QCRMCALL=1,1 加入开机启动 rc.local，注意文件需要可执行权限 echo -e "at\$qcrmcall=1,1\r\n" >/dev/ttyUSB2 | cat /dev/ttyUSB2
修改路由配置文件vi /etc/config/network
config interface ‘wan‘ option device ‘/dev/cdc-wdm0‘ option proto ‘qmi‘ option apn ‘cnnet‘ option username ‘card‘ option password ‘card‘ option ifname ‘wwan0‘
WEB页面添加新的wan接口：
登录web页面，network -> interfaces，点击 add new interfaces ，任意起个名字，DHCP CLIENT, interface选择新的网口eth*，firewall 加入wan，刷新后看是否能够自动获取ip,获取ip成功即可联网！
原文：https://www.cnblogs.com/jackron/p/13970232.html