struct usb_pipe *alloc_intr_pipe(u32 endp, int period);
int usb_poll_intr(struct usb_pipe *pipe, void *data);
struct usb_interface_descriptor;
struct usb_pipe *alloc_intr_pipe(u32 endp, int period);
int usb_poll_intr(struct usb_pipe *pipe, void *data);
struct usb_interface_descriptor;