Which serial driver for the development board?

Hi,

I just received Sparkfun QuickLogic board. After connecting it via USB,
I found following device:

# usbconfig -d ugen0.5 dump_all_desc
ugen0.5: <vendor 0x1d50 product 0x6141> at usbus0, cfg=255 md=HOST spd=FULL (12Mbps) pwr=ON (100mA)

  bLength = 0x0012 
  bDescriptorType = 0x0001 
  bcdUSB = 0x0200 
  bDeviceClass = 0x0002  <Communication device>
  bDeviceSubClass = 0x0000 
  bDeviceProtocol = 0x0000 
  bMaxPacketSize0 = 0x0020 
  idVendor = 0x1d50 
  idProduct = 0x6141 
  bcdDevice = 0x0000 
  iManufacturer = 0x0000  <no string>
  iProduct = 0x0000  <no string>
  iSerialNumber = 0x0000  <no string>
  bNumConfigurations = 0x0001 

Searching for VID and PID did not get me anything. Trying any of our
USB serial driver did not create any device. How can I connect to this
device? It should be some serial port because that's what Sparkfun page
says... Any hint?

Regards,
Milan

N. B. I was able to connect to this device using my Mac:

# cu -l /dev/tty.usbmodem1411
Connected.
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Hello world!!

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