Shawn: Maybe I have a contribution...
On Monday 26 August 2002 18:32, Xiaogeng (Shawn) Jin wrote: > > You are passing bad/insufficient boot arguments to the Linux kernel; > > unfortunaltely you don;t show us this part of the boot messages, so I > > cannot even guess what you're doing wrong. > > Finally I figured out the problem and solved it. The problem is that the > kernel didn't get the LINK status correctly. The 'fep->link' was always > 0 which means the link is down or autonegotiation is in progress. > > In the code which defines 'phy_info_lxt971', it says that somehow LXT971 > tells me that the link is down when the first read after power-up. So > you have to read MII_REG_SR to set 'fep->phy_status' accordingly. But in > my case, the read action occurred too early to wait till the link is up. > So what I did is to delay 5s before reading MII_REG_SR during opening > FEC device. I guess it takes the link a while to autonegotiate the speed. Hmm. I suppose PHY should interrupt when link status change, and therefore phy_status would be updated accordingly. So, maybe you have a problem with your board's PHY interrupt signal. Hope this helps. -Scop. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
