The source code here comes from the Exar website, downloaded on 2 June 2014.
It has been updated to work with the Linux kernel tty API. I have tested it on 3.13.
To build, ensure you have kernel headers and a compiler installed:
$ sudo apt-get install linux-headers-generic build-essential
$ cd exar-uart-driver $ make $ sudo make modules_install
You will need to complete the make && sudo make install step whenever your kernel is updated.
If you need debian packages, refer to README.Debian