TI C54x tools for Linux platform are freely available solely for open-source development. Check out TI website for details.
For those who want to experiment with Farfon or further develop it.
After a few years of delibration, Farfon was finally declared open source. Farfon was the first phone designed for IAX from the ground up. Now we think, its the first open source reference design. Stay tuned for more information.