any cable for the joystick to usb?

Any retailer of computer accessories should have available an adapter (very cheap) which will enable a gameport/midi cable to be connected to a computer's USB port, though depending on your machine, that may or may not get you where you want to be; your machine may or may not support the functionality you're after. I suggest you consult with your computor's vendor for specifics as would apply in your particular situation.