On this page you will find a port of the ixpci-0.6.5 drivers available from http://www.icpdas.com/download/linux.htm to the Linux 2.6.14.x kernels.
The drivers does not include sysfs support, so you will have to create the ixpci0 device node by hand, by issuing the following command as root:
mknod ixpci0 c 254 0
Included in the tar-ball is two "ports" of the DEMO19.C program. One which does exactly the same as DEMO19.C, and one which does the same, using the Magic Scan feature.
The kernel driver and a simple user space library, including examples