[tulip] EEPROM fixup on PPC
Thu, 15 Mar 2001 10:26:38 +0200
just ran into an "interesting" tulip
implementation on a PPC board I
am porting Linux 2.4.2 to here:
- They had left out the EEPROM
on a 21143 system.....
Ok, no problem, there is a fix in the
driver for that.
But there was some things that did not work
on a PPC, here they are if you want to fix the
general parts (I can get you a diff if you are interested
enough :-) )
- Firstly the driver refused to load any media table
when not finding any EEPROM. Easily fixed by
removing one return after the warning for no EEPROM
- Secondly: The EEPROM data in eeprom_fixup is defined
as words and later interpreted as bytes. The PPC byteordering
will make these go haywire.Esily solved by changing the eeprom_fixup
data type to unsigned chars.
(Is there a good reason for having them as words, Donald ?)
- Thirdly: The docs for doing your own eeprom_fixup table will not
really work for a 21143. But defing a media table with entries of
type 2 and 4 worked out fairly well.
- Fourth: The MAC address had to be obtained from a completely
other place on the board. This is not really a general (your) problem and
will have to be hacked especially for my board here.
Dag Nygren email: email@example.com
Oy NewTech Ab phone: +358 9 8024910
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02360 ESBO GSM: 0400-426312