usb_acecad
struct usb_acecad *acecad = input_get_drvdata(dev);
struct usb_acecad *acecad;
struct usb_acecad *acecad = usb_get_intfdata(intf);
struct usb_acecad *acecad = urb->context;
struct usb_acecad *acecad = input_get_drvdata(dev);