GSPI Support

[Angel Roman]

Hi Everyone,

I successfully ported the marvell bulverde gspi driver to the mx31 
processor using the linux spi implementation and using a GPIO as the 
chip select - the MX31 has some issues with keeping the chip select 
signal active for longer than 8 spi word transfers.

Unfortunately, this work cannot be open sourced due the licensing 
agreements. However, after searching the web, looking at the libertas 
source code and the documentation from the module vendor, I was able to 
gather all the information to implement a GSPI extension to the libertas 
driver.

Currently, I have TX/RX data going to and from the chip as well as CMDs 
under linux 2.6.24.4 and I am able to establish an association with a 
local access points. Unfortunately, I had to uncomment the DATA_RATE 
command since non of the firmware versions available from marvell (gspi 
8.70.8, 9.45.3, and 0.70.3) support it.

The current status of my driver is:
- ability to read write to all registers in the GSPI module
- ability to send and receive data
- ability to send commands and receive command responses.
- ability to scan for local access points and associate with them (at 
least the associate command is successful and it the SSID shows up in 
the iwconfig information).

Unfortunately, I am unable to receive a DHCPOFFER from my wireless 
router At this point, I plan to get 2.6.26.5 running on my board to test 
and work with a later version of libertas.  In the meantime, does anyone 
have any suggested workarounds for firmware that does not support the 
DATA_RATE command? Is this still a requirement of the latest libertas 
driver? I assume we can do something via the RATE_ADAPT_RATESET command. 
Any thoughts?

Regards,
Angel Roman