US Patent 7711863 Method and apparatus for variably enabling USB interaction

A method and apparatus for variably enabling interaction across a USB interconnect between a host and a peripheral device capable of performing a plurality of functions including enabling selection and execution of a vendor-specific support software supporting peripheral devices of a specific vendor by sending a first identification data to the host indicating that the peripheral device is of the same specific vendor and indicating that the peripheral device performs at least one of the functions indicated to be supported by the vendor-specific support software, awaiting receipt of an indication from the host of a selected subset of the plurality of the functions of the peripheral device that are to be enabled, simulating a detachment from and attachment to the host; and enabling the vendor-specific support software to again be selected and executed by sending a second identification data to the host indicating that the peripheral device is of the same specific vendor and indicating that the peripheral device performs the selected subset of functions.