AW: Direct MII connection between MPC8313 and VIRTEX FPGA

[Frank Prepelica]

Hi Grant

Thanks for your response!

I have searched for "current-speed" in drivers/net/fec_mpc52xx.c but I cannot find anything. However we are using the gianfar.c Ethernet driver.
Do you know whether this driver supports fixed MII links without PHY?

I've got another question regarding MII connection between and MPC and a Virtex FPGA. Whats about the PHY address which has to be set in the DTB file? Do I have to modify the DTB at all?


Thank you!


Best regards
Frank

 
 
 
	
		 
 

Frank Prepelica
Software Design Engineer

Ubidyne GmbH
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Email:              frank.prepelica at ubidyne.com
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> -----Ursprüngliche Nachricht-----
> Von: Grant Likely [mailto:grant.likely at secretlab.ca]
> Gesendet: Donnerstag, 25. Juni 2009 22:06
> An: Frank Prepelica
> Cc: linuxppc-dev at ozlabs.org
> Betreff: Re: Direct MII connection between MPC8313 and VIRTEX FPGA
> 
> On Thu, Jun 25, 2009 at 9:11 AM, Frank
> Prepelica<Frank.Prepelica at ubidyne.com> wrote:
> > Hi all,
> >
> > we removed the ethernet PHYs (MARVELL) from our customized board (based
> on MPC8313ERDB) and
> > connected the CPU Ethernet lines directly to a FPGA which is now
> emulating the PHY. But the ifconfig
> > command cannot find that eth device anymore. Does the emulated PHY needs
> to provide MDIO
> > information that the ETH device can be found again?
> 
> No, you just need to make sure that the Ethernet driver is able to
> support fixed speed MII links without a PHY.  It's trivial to do, but
> not all drivers support it.  Search for "current-speed" in
> drivers/net/fec_mpc52xx.c for an example.
> 
> g.
> 
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.