From mboxrd@z Thu Jan 1 00:00:00 1970 Reply-To: From: "Allen Curtis" To: "Jean-Denis Boyer" Cc: Subject: RE: Poor 8260 FCC Ethernet performance Date: Thu, 30 May 2002 20:42:31 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" In-Reply-To: Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: > The 8260 Ethernet controller needs to know about the duplex mode in which > the PHY operates. The driver sets it to half duplex by default, and needs > the feed back of the PHY to set it to full duplex. > > As you may know, the hub always operates in half duplex, while the switch > usually operates in full duplex, if it is directly connected to your unit, > and your PHY accepts to negociate to full duplex. > Yes, the source code has been modified to force full-duplex. (fcc_restart(dev,1) if I remember correctly :) In fact, before this change was made Ethernet communications did not work at all. (At least it would not get past bootp) I searched for something that looked like it was speed related but found nothing. (Other than the MII reporting) Other ideas? BTW: We are using a BCM switch for our PHY. The interface to the processor is always full-duplex, 100BT regardless of the external connections. Hence the no MII PHY option. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/