It is from steven james's baremetal in linuxbios util.

yhlu seperate common functions from uhci.c to usb.c and create ohci.c to support ohci.

ohci.c mainly cames from kernel 2.4.22 dirvers/usb/host/usb-ohci.c.

it includes several parts

1. UHCI+OHCI--->USB: privide usb init and usb_control_msg and usb_bulk_msg interface

2. USB_SCSI: bulk only device

3. USB_X interface to FILO

other changes in Etherboot

1. Add allot2 and forget2, it will produce the required aligned memory.

todo:

1. EHCI support

yhlu 6/2/2004