Name
usb_speed_string — 
  Returns human readable-name of the speed.
 
Synopsis
| const char * usb_speed_string ( | enum usb_device_speed speed ); | 
 
Arguments
- speed
- 
     The speed to return human-readable name for.  If it's not
     any of the speeds defined in usb_device_speed enum, string for
     USB_SPEED_UNKNOWN will be returned.