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{ 2007 09 01 }

Intercepting hotplug on the Freecom FSG-3

The Freecom FSG-3 wireless storage router has four USB ports, and has support for hotplug built into the kernel.  This makes it ideal for use as a docking station for OpenMoko phones.

Unfortunately, it does not have the normal hotplug agent scripts that you expect to find on a desktop Linux distribution.

So you have to roll your own:

  1. Run “mv /sbin/hotplug /sbin/hotplug.freecom“
  2. Create a new “/sbin/hotplug” shell script (the following is an example of how to automatically enable USB networking for an OpenMoko phone): 
    #!/bin/sh

case $1 in
  ( usb )
    case $PRODUCT/$INTERFACE in
      ( 1457/5122/212/2/6/0 ) # OpenMoko GTA01 cdc-ether
        case $ACTION in
          ( add )
            ifconfig usb0 192.168.0.200 up
            ;;
          ( remove )
            ifconfig usb0 192.168.0.200 down
            ;;
        esac
        ;;
    esac
    ;;
esac

/sbin/hotplug.freecom "$@"

  3. Run “chmod ugo+x /sbin/hotplug” to ensure that your new hotplug script is executable.
  4. See http://linux-hotplug.sourceforge.net/?selected=usb for the list of environment variables you can use to distinguish different devices.
Posted by Rod Whitby on Saturday, September 1, 2007, at 3:41 pm. Filed under OpenMoko. Follow any responses to this post with its comments RSS feed. Both comments and trackbacks are currently closed.