-----Original Message----- From: Grant Likely [mailto:grant.lik...@secretlab.ca] Sent: Wednesday, May 20, 2009 12:49 To: Eric Millbrandt Cc: Jon Smirl; Wolfram Sang; linuxppc-dev@ozlabs.org Subject: Re: mpc5200 fec error
On Wed, May 20, 2009 at 10:41 AM, Eric Millbrandt <emillbra...@dekaresearch.com> wrote: > It looks like the phy is never getting reset properly after the > FEC_IEVENT_RFIFO_ERROR. I threw some printk's into the fec mdio driver Yes, that sounds familiar. Most likely, the value of the MDIO bus control register got clobbered and not reset when the FEC was reset. Try adding this line to the beginning of mpc52xx_fec_mdio_transfer(): out_be32(&fec->mii_speed, 0x7e); It's a dirty ugly hack, but it should help. If that works, then I can come up with a better solution. Part of the problem is that the MDIO handling in the current code really isn't very good. I've got changes queued up in -next which cleans it up quite a bit which should make it easier to fix properly. g. That worked! I'm still getting the fifo receive errors, but at least now the fec recovers. [ 127.761365] net eth0: FEC_IEVENT_RFIFO_ERROR [ 129.274341] PHY: f0003000:00 - Link is Down [ 130.274266] PHY: f0003000:00 - Link is Up - 100/Full [ 134.955324] net eth0: FEC_IEVENT_RFIFO_ERROR [ 136.273959] PHY: f0003000:00 - Link is Down [ 137.274090] PHY: f0003000:00 - Link is Up - 100/Full [ 140.521462] net eth0: FEC_IEVENT_RFIFO_ERROR [ 142.273955] PHY: f0003000:00 - Link is Down [ 143.273954] PHY: f0003000:00 - Link is Up - 100/Full [ 148.471582] net eth0: FEC_IEVENT_RFIFO_ERROR [ 150.273984] PHY: f0003000:00 - Link is Down [ 151.273901] PHY: f0003000:00 - Link is Up - 100/Full Thanks Grant. _________________________________________________________________________________________ This e-mail and the information, including any attachments, it contains are intended to be a confidential communication only to the person or entity to whom it is addressed and may contain information that is privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender and destroy the original message. Thank you. Please consider the environment before printing this email. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
