UsbConfigHostCDC

Host CDC Kernel Config

Linux PSP

About this page

This page describes the Linux kernel config options for usb host CDC on different kernel versions. Please refer the config option which matches with kernel version of release you are using.

Configuration

Linux v3.2

Start the Linux Kernel Configuration tool:

$ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm menuconfig

Select Device Drivers from the main menu.

    ...
    ...
    Power management options --->
    [ ] Networking support --->
    Device Drivers --->
    File systems --->
    Kernel hacking --->
    ...
    ...

Select USB support as shown here

    ...
    ...
    <*> Sound card support  --->
    [*] HID Devices  --->
    [*] USB support  --->
    <*> MMC/SD/SDIO card support  --->
    ... 
    ...

Select Support for Host-side USB as shown here

    ...
    <*>   Support for Host-side USB
    [ ]     USB verbose debug messages
    ...
    ...

Select USB Modem (CDC ACM) support as shown here

    ...
    ...
          *** USB Device Class drivers ***
    <*>   USB Modem (CDC ACM) support
    < >   USB Printer support
    ...
    ...

Now exit from here and select "Network device support" as shown here

    ...
    ...
    < > Generic Target Core Mod (TCM) and ConfigFS Infrastructure  --->
    [*] Network device support  --->
    ...
    ...

Go to USB Network Adapters as shown here

    ...
    ...
    < >   PPP (point-to-point protocol) support
    USB Network Adapters  --->
    [ ]   Wireless LAN  --->
    ...
    ...

Select Multi-purpose USB Networking Framework and CDC Ethernet support as shown here

    ...
    ...
    < > USB RTL8150 based ethernet device support (EXPERIMENTAL)
    <*> Multi-purpose USB Networking Framework
    < >   ASIX AX88xxx Based USB 2.0 Ethernet Adapters
    <*>   CDC Ethernet support (smart devices such as cable modems)
    ...
    ...

This is all required for adding USB host CDC support in kernel.

Testing

The test setup includes connecting two EVMs, EVM-1 is configured in host mode (enabling CDC-host configuration as explained above) and EVM-2 is configured in CDC-device mode configuration. Connect EVM-2 (CDC-device act as CDC-modem) to EVM-1 (CDC-Host), the EVM-1 CDC-Host will recognize the EVM-2 as usb-modem and creates the new usbx network interface.

on EVM-2 (CDC-Device)

 #ifconfig usb0 192.168.0.3 up

on EVM-1 (CDC-Host): A new interface say usb0 or usb1 will be created.

 #ifconfig usbx 192.168.0.5 up

perform the ping from EVM-1 to EVM-2 (vice-versa).