i use phycard-i.MX27 ,when i enable usb, but i got these messages ULPI Vendor ID 0x0 Product ID 0x0 No ISP1504 found ehci at ehci0: USB EHCI 1.00 ULPI Vendor ID 0x0 Product ID 0x0 No ISP1504 found 2011-08-04 154554381