Re: [Etherboot-developers] Intel 82559ER question

[BHARATHWAJ M. <mb...@co...>]

On Fri, 21 Dec 2001, Ken Yap wrote:

> >Unfortunately, I am getting timing issues.  For instance, if I keep adding
> >printfs in the do loop in the function do_eeprom_cmd in eepro100.c, the
> >loop advances, if not it doesn't.  Here is my do_eeprom_cmd in eepro100.c:
>
> It could be that the timing requirements of recent chips require a
> larger delay now. You could try increasing the value in udelay (but only
> up to max of about 50, due to the way udelay works). Also have a look at
> what values they're using in Linux drivers these days.

Hmmm...ok, I will try that.  The maximum value I tried in udelay was 8, I
will go further :).

> Also udelay relies on the hardware timer. Do you have this timer on your
> motherboard?

I will have to verify this.  Right now I am thinking no, because I noticed
that although -DASK_BOOT=3, there
is no waiting at all, just flies right through using the default value.  I
tried setting it to 10, didnt work, no waiting at all!

I am going to try increasing the udelay value, and check out the Linux
drivers.

Bharath


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