Patent ID: 7600067

Claim:
A method for identifying bridge devices, comprising: receiving a standard command comprising a command code by a bridge device from a host controller, wherein the standard command is recognized and defined to the bridge device; transmitting the standard command to a standard interface device by the bridge device; performing the standard command by the standard interface to generate output information comprising at least one no-available parameter in response to the standard command, wherein the no-available parameter has an any value, and transmitting the output information to the bridge device by the standard interface device; determining whether the command code matches a predefined value by the bridge device; setting the at least one no-available parameter from the any value to a specific value by the bridge device if the command code matches the predefined value; transmitting the output information that has been set by the bridge device to the host controller by the bridge device; identifying the bridge device by the host controller or an application according to the output information that has been set by the bridge device by determining whether the specific value of the no-available parameter matches a predetermined value of a specific supported bridge device.