void uhci_init(void *data);
int uhci_control(u32 endp, int dir, const void *cmd, int cmdsize
, void *data, int datasize);
-struct usb_pipe *uhci_alloc_intr_pipe(u32 endp, int period);
+struct usb_pipe *uhci_alloc_intr_pipe(u32 endp, int frameexp);
int uhci_poll_intr(struct usb_pipe *pipe, void *data);