Hi Peter, On 6/26/2010 4:19 PM, Peter Tyser wrote: > Hi Felix, > > In any case, our testing and the Freescale FAE's input showed that > in-band auto-negotiation on the SGMII interface didn't work, thus I > submitted the change you referenced. If my memory is correct, > empirically it looked like the MPC8572 did support 1000 base-X > auto-negotiation, but not SGMII auto-negotiation. Can you validate > you're using SGMII and not 1000 base-X to connect the P2020 to the > VSC8211 PHY? A simple way to test this should be to connect the VSC8211 > to a 100 mpbs switch - this should work fine via SGMII but not 1000 > base-X (assuming you're using a copper interface).
I'm definitely using SGMII with eTSEC2. This is documented in board user manual. Also, eTSEC2 works when connected to 100 mbps switch. >> I'm not familiar with how SGMII is configured on this controller, but >> it appears that Peter's patch turned of Autonegotiation. Why this >> would make a PHY work and a switch not work is curious... Maybe we >> should have a CONFIG option for SGMII parameters. Settings could >> default to the ones Peter set (since he submitted it in November and >> problems are surfacing now), but could be overriden. Does that sound >> reasonable? Something like: >> >> >> #ifndef CONFIG TSEC_TBICR_SETTINGS >> #define TBICR_SETTINGS ( \ >> TBICR_PHY_RESET \ >> | TBICR_FULL_DUPLEX \ >> | TBICR_SPEED1_SET \ >> ) >> #else >> #define TBICR_SETTINGS CONFIG_TSEC_TBICR_SETTINGS >> #endif >> Thanks. > This solution is fine by me. I'd be curious if anyone at Freescale has > a definitive answer about SGMII and auto-negotiation. I'm happy to try > any patch on Monday I've posted a patch, see http://lists.denx.de/pipermail/u-boot/2010-June/073208.html Can you please test it ? Thanks. Felix. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
