lkml.org 
[lkml]   [2001]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subjectvia-rhine and MMIO
Date
I have done some changes to the via-rhine driver in 2.4.13 to be able to run
with MMIO. I know it isn't really needed but I do it mainly for fun &
learning.

The most important change was to enable memory-mapped mode within the rhine
chip by a standard port-io call. I have got it all to work, and it works
under stress test too, but there is a section in the code that I wonder
about:

(drivers/net/via-rhine.c)
...
/* Reload the station address from the EEPROM. */
writeb(0x20, ioaddr + MACRegEEcsr);
/* Typically 2 cycles to reload. */
for (i = 0; i < 150; i++)
if (! (readb(ioaddr + MACRegEEcsr) & 0x20))
break;
...

If I run this code when I'm using MMIO, I get a hardware adress of
"ff:ff:ff:ff:ff:ff" instead of the right one (and everything craps up). But
when I comment out this part all is fine. So what's it needed for anyway?

_____________________________________________________
| Martin Eriksson <nitrax@giron.wox.org>
| MSc CSE student, department of Computing Science
| Umeå University, Sweden


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:11    [W:0.102 / U:6.724 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site