This module file is a hack from the viahss-0.6 driver. I took that module
and implemented the ACPI init function for the Via serial port to enable
accessing the Serial port under linux. Ideally this should be handled via
the ACPI routines or in the serial.c driver.

The issue is that the Bios does not enable the serial port connected to the
touchscreen controller. ACPI is used to enable it. Linux does not support
enough ACPI to enable the interface. To verify the operation, run
'setserial /dev/ttyS0' and you will see an unknown interface. After running
the commands below, run the setserial command again and you will see a
16550a interface. Now to figure out the touchscreen commands.

To build:
1) make
2) make install

To use:
1) insmod fpi2002
2) setserial /dev/ttyS0 autoconfig

Now the serial port is visible and useable.