Flexible mobile device connectivity to automotive systems with USB hubs

An integrated circuit, comprising:

• an upstream universal serial bus (USB) port configured to be connected to a first USB host;
• a downstream USB port configured to be connected to a USB consumer device;
• a USB routing logic circuit;
• and
• a bridge device comprising a bridge controller, a first USB device having a first control endpoint, a first input buffer, and a first output buffer, and a second USB device having a second control endpoint, a second input buffer, and a second output buffer,
• the bridge controller configured to:
• receive a first descriptor request directed to the first control endpoint from the first USB host connected to the upstream USB port,
• transmit the first descriptor request to the first USB device and receive a first descriptor response generated by the first USB device in response to the first descriptor request,
• encapsulate the first descriptor response to include information identifying the first USB host,
• transmit the encapsulated first descriptor response back to the first USB host,
• receive a second descriptor request directed to the second control endpoint from the USB consumer device acting as a second USB host connected to the downstream USB port;
• transmit the second descriptor request to the second USB device and receive a second descriptor response generated by the second USB device in response to the second descriptor request,
• encapsulate the second descriptor response to include information identifying the USB consumer device as the second USB host, and
• transmit the encapsulated second descriptor response back to the USB consumer device,
• the USB routing logic circuit configured to bypass the bridge device when the USB consumer device is functioning as a USB device rather than the second USB host.