[U-Boot-Users] Ethernet does not work on at91rm9200
wd at denx.de
Tue Jul 6 11:41:05 CEST 2004
In message <367ED8C46538D7119DAC000A0D106744520D57 at elmegmbh.elmedmn.com> you wrote:
> There is an interesting thread about initializing the mac adress:
And the King (Russell, that is :-) spoke:
That's a buggy driver then - drivers are supposed to reload the ether
address into the chip on open() - if they don't, they're buggy.
Basically, the driver is supposed to read the MAC address at startup.
On ->open, it is supposed to reprogram the MAC address back into the
chip (but not the EEPROM, if any) whether or not it has been changed.
[Mind: this is about the _Linux_ drivers.]
This is what I've been telling you all the time: a Linux driver shall
not make any assumptions about any initialization being done (or not
done) by a boot loader; instead, it is responsible to perform all
required initialization himself. So if you need to set a MAC address
for successful operation of the ethernet interface, then the Linux
ethernet driver MUST set the MAC address. Otherwise it is broken and
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
Our OS who art in CPU, UNIX be thy name.
Thy programs run, thy syscalls done,
In kernel as it is in user!
More information about the U-Boot