USB_ControllerDeregister (SWI&55385) — De register a host controller
| R0 | Pointer to controller structure |
| R1 | Reserved. Must be set to zero. |
| R2 | Reserved. Must be set to zero. |
The reference to the controller structure is deregistered automatically in every case.
Removes a controller structure from the USB Module. All endpoints are also removed. All devices at this USB are also removed and service calls are generated. If no references using this host controller are active the host controller structure will be removed physically from memory.
This call is normally used only internally by the USB host controller driver if it ends.