Linux driver for PCIe DE2i-150

I don't own the DE2i, so I couldn't check. I do have an old possibly outdated copy of the CD. All I found were sources for an interface to a shared library whos sources are not on the CD. There is also a kernel module whos source is not provided.

You will have to contact Terasic to see if the source is available. It may not be. Note that companies write proprietary code for Linux all the time. Just because something is for Linux (even a kernel module) doesn't obligate a company to provide source for it. If changes are made to a Linux kernel source file, patches must be provided. A separate kernel module such as this can be either proprietary or open source as the creator wishes.

Edit: If you can't do what you to do with the binaries provided, many companies can be hired to write drivers to your specifications (not cheap). If you wish to write drivers yourself, you can probably download the datasheet, etc for the CPU from Intel. Information on the FPGA end is of course available from Altera.