where is alias 'name' for USB controller module?

[mikepolniak <mikpolniak@adelphia.net>]

I want to auto-load the module for the USB contoller (usb-ohci) by its alias in
/etc/modules.conf:
alias ????  usb-ohci

Where do i find the alias 'name' that kmod+modprobe use to look up this feature?