driver for "Fujitsu Takamisawa USB Touch Panel"?

[David]

Hi,

I've got Linux running happily on a Panasonic Toughbook CF-T4 (and I
love this laptop!).  The laptop has a touch panel that I can poke with
my finger in Windows.  I'd really like it to work in Linux.

I've done lots of searching and haven't found a Linux driver for the
touch panel, which is reported as "Fujitsu Takamisawa USB Touch Panel".
The Ubuntu Device Manager tells me its "info.capabilities" include
"input" and "input.joystick".  "lsusb -v" [1] tells me the
"bInterfaceProtocol" is "Mouse".  Does this mean I can use an existing
joystick or mouse driver?  (I've clumsily tried both without success.)

The device file for the touch panel is "/dev/input/event1", and I can
see it spit out promising batches of data whenever I touch the panel.
It makes me tempted to write a driver.

Questions:

     1. How can I definitively determine whether a Linux driver exists
        for this device?
     2. Can I use an existing mouse or joystick driver with it?
     3. If the answers to the above questions are "no", then I'd like to
        write a driver for it myself.  Where should I start?  Is there
        an existing driver I should modify (fpit?) or should I start
        from scratch?

Thanks for helping out this newbie,
David

[1] # lsusb -v

Bus 002 Device 002: ID 0430:0501 Sun Microsystems, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0430 Sun Microsystems, Inc.
  idProduct          0x0501
  bcdDevice           11.30
  iManufacturer           1 Fujitsu Takamisawa
  iProduct                2 USB Touch Panel
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower               20mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      2 Mouse
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      58
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)