[U-Boot] writing board_nand_init for pollux vr3520F

[Miguel Amez]

Hi Scott,

thanks for your answer.
Indeed, I have the datasheet from the manufacturer of the SoC.
There is a project from Jeff Kent that treats about running U-boot an,
ideed, a linux kernel on these chips.
The specifications for this SoC could be consulted here:
http://kthx.ath.cx/trac/nc600/raw-attachment/wiki/Hardware/NC600/POLLUX%20Databook%20Rev0.91.pdf

I'm new to U-boot, so I would like to know if some instructions are
available to know the basics for developing a custom board for pollux. An
initial approach was made by Jeff Kent. It could also be consulted on his
trac here: http://kthx.ath.cx/trac/uboot/

I think that his project is very atractive. I bought 3 pollux thin clients
and see linux working on them would be great! But I think it would need some
work...

Regards,
Miguel Amez

El 15 de noviembre de 2010 20:42, Scott Wood <scottwood at freescale.com>escribió:

> On Sat, 13 Nov 2010 17:33:02 +0000
> Miguel José Amez Riendas <miguel.amez at mercatest.com> wrote:
>
> > Hi list,
> >
> > this is my first post on u-boot list.
> > I'm trying to write function "board_nand_init" for a Pollux VR3520F SoC
> > based board.
> > I'm having some troubles and really don't know very good where to start
> and
> > which parts of nand_chip pointer have to be filled and which not.
> > Could you please help me a little bit on this?
>
> Does its NAND controller resemble any of the drivers under
> drivers/mtd/nand?
>
> If so, look at what other boards using that controller are doing.
>
> If not, you'll need to write a controller driver.  What that driver
> looks like depends on how the hardware works -- do you have a simple
> interface to read/write bytes or words, and raise/lower some signals?
> Maybe with an ECC accelerator?  Or does the hardware isolate you more
> from the hardware details, such that you program it to do high level
> operations such as read page, erase block, etc?
>
> -Scott
>
>