I would like to do the same thing with a LM3S6965. I know the FTDI chip is
the same.
I have installed the ftdi drivers on my linux box, but when I plug the
board in and try to connect with OpenOCD, the OpenOCD application says that
there is still no ftdi device available.

If I were to follow the steps here including the constant declaration
placed in the header file would OpenOCD be able to connect?

Thank to "cs_posting", Mil Wilson, and all the other respondents, I have 
gotten my Linux machine talking to my Luminary LM3S811 evaluation board.

The board uses an FTDI FT2232D chip in a design that is advertised as 
being compliant to the OpenOCD design, but which uses a unique product 
ID.  Luminary provides Windows device drivers, but no Linux support.

It turns out that I had to edit the FTDI device driver and build my own 
module.  I ended up building an entirely new kernel, because I didn't 
have time to figure out how to rebuild just one module -- that's OK, 
because it works and I can meet my obligations for the next few days 
without having to use my cranky old Windows laptop for presentations.  
Later on I can learn how to do it 'right' (and maybe have a kernel 
that'll let me talk FTDI and wireless at the same time).

The specific solution is to go into the ftdi_sio.c file, and add a line 
to the definition for the "id_table_combined".  I put it right below the 
one that specifies the Olimex part, so the two lines read:

	{ USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
		.driver_info = (kernel_ulong_t)&ftdi_olimex_quirk },
	{ USB_DEVICE(FTDI_VID, LUMINARY_LM3S811_PID),
		.driver_info = (kernel_ulong_t)&ftdi_olimex_quirk },

(note that I had to go into ftdi_sio.h and define LUMINARY_SM3S811_PID as 
0xbcd9).

Thanks again to all.

-- 
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html