ibm_newemac driver hangs while using 10Mbps full-duplex

Hi, We are using denx kernel 2.6.31.4 on ppc405ex with national semiconductor DP83640 Ethernet transceiver. The kernel driver (ibm_newemac) seems to hang after setting the ethernet phy to use 10Mbps Full-duplex settings. The time after which the driver hangs is random. I am predicting that it's

enabling USB Host controller on ppc405ex based board

Hi, We have Kilauea based board using ppc405ex. & it has usb-otg tranciever chip on it. I am trying to enable USB Host Controller Driver in linux kernel (version DENX 2.6.27-stable). For this to be enabled, I also have to enable PCI in kernel config. But when I load the kernel uImage with bot