void *buffer, int transfer_len, int interval);
int usb_disable_asynch(int disable);
int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
-inline void wait_ms(unsigned long ms);
int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
int cfgno);
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,