hi3518有没有移植过3G/4G模块的驱动哦？

一般插上就会枚举USB信号的
要不然就是 模块的 ID号这些添加不对

需要给4G模块厂要linux下驱动移植资料，一般需要修改内核支持4G模块，以及在driver/usb/serial目录下修改option.c里的两处。
中兴me3630Linux驱动修改
2.1 ENABLE DRIVERS AND PPP FEATURE FROM KERNEL
USB-modem drivers and PPP features may be not enabled in the kernel, so please go to kernel, do “make menuconfig” and include the following components into building:
1. Device Drivers --->
USB support --->
USB Serial Converter support --->
USB Generic Serial Driver
USB driver for GSM and CDMA modems
2. Device Drivers --->
Network device support --->
PPP (point-to-point protocol) support
PPP multilink support PPP filtering
PPP support for async serial ports
PPP support for sync tty ports
For modems with ECM or NDIS interface, such as ZM5330/ZM8620/ME3620/ME3630, including the following component additionally
3. Device Drivers --->
Network device support --->
USB Network Adapters --->
Multi-purpose USB Networking Framework
After saving the configuration, check the “.config” file, the following lines must exist, if any line doesn’t exist, it means your configuration above is not correct.

static struct usb_device_id option_ids[] = {
{ USB_DEVICE(0x19d2, 0x0117 },
{ USB_DEVICE(0x19d2, 0x0199) },
{ USB_DEVICE(0x19d2, 0x1476) },

you need to add the following code to function option_probe
printk("idVendor=%x, idProduct=%x, bInterfaceNumber =%d\r\n", serial->dev->descriptor.idVendor, serial->dev->descriptor.idProduct, serial->interface->cur_altsetting->desc. bInterfaceNumber);
if (serial->dev->descriptor.idVendor == 0x19d2 && serial->dev->descriptor.idProduct == 0x1476 && serial->interface->cur_altsetting->desc. bInterfaceNumber == 3)
return -ENODEV;
if (serial->dev->descriptor.idVendor == 0x19d2 && serial->dev->descriptor.idProduct == 0x1476 && serial->interface->cur_altsetting->desc. bInterfaceNumber == 4)
return -ENODEV;
if (serial->dev->descriptor.idVendor == 0x19d2 && serial->dev->descriptor.idProduct == 0x1509 && serial->interface->cur_altsetting->desc. bInterfaceNumber == 4)
return -ENODEV;
if (serial->dev->descriptor.idVendor == 0x19d2 && serial->dev->descriptor.idProduct == 0x1509 && serial->interface->cur_altsetting->desc. bInterfaceNumber == 5)
return -ENODEV;

重新编译内核下载，插上模块就可以识别/dev/ttyUSB*了