Pandaboard: GPMC linux dirver

[nathan]

Hi,
I'm planning to connect a FPGA on the GPMC exapnsion bus on Pandaboard.
I'm wondering if ubuntu kernel for pandaboard (10.10) includes GPMC driver. Are there any wiki or projects sites related to this task ?

thanks,

[haunma]

Hi Nathan,

I have a similar project here:

http://www.keteu.org/~haunma/proj/pandadaq/

Board layout is progressing in fits and starts. I'm hoping to have
gerbers by the end of July. The design will follow the Beagle Tracker
board in configuring the FPGA by SPI (slave serial mode), so although
I connect with the GPMC, it is not necessary for bootstrapping. I
haven't yet investigated how to access and configure the OMAP4 GPMC in
Linux, but if you search through the kernel sources you'll find some
relevant code. Let's keep in touch.

Regards,

Mark

[prpplague]

Nathan,

depend on what mode you want to communicate with your FPGA over the
GPMC, you can either use the gpmc-nand.c or something similar to gpmc-
smc91x.c as examples:


http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=arch/arm/mach-omap2/gpmc-nand.c;h=c1791d08ae56a5a45847bfd8064213cfe36a6345;hb=56299378726d5f2ba8d3c8cbbd13cb280ba45e4f
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=arch/arm/mach-omap2/gpmc-smc91x.c;h=ba10c24f3d8dcef3378490a9f615c74b471e22a2;hb=56299378726d5f2ba8d3c8cbbd13cb280ba45e4f


Dave

[Ben Gamari]

ruchin...@vvdntech.com writes:

> Hi Dave ,
>
> I am also doing the same thing and mode i am using is GPMC Nand , Can you
> please let me know how we can do read and write operations on it or what is
> the software support we can provide to the hardware team for these
> interface . i am using configurable FPGA (Actel IGLOO 400 series connected
> to 16 bit interface on processor bus with Local RAM & AGL400 IGLOO series
> Low power Flash FPGA will be used with 16bit interface to the Processor
> Local Bus (GPMC).
>
I was also working on a similar task not so long ago for the
PandaDAQ. My stab at a Linux driver can be found on Github[1]. Sadly I
killed my JTAG interface before figuring out what was going on. Last I
tested reading from the interface resulting in the processor hanging.

Cheers,

- Ben

[1] http://www.keteu.org/posts/pandadaq.html
[2] https://github.com/bgamari/linux/tree/pandadaq/devel