HelenOS sources
HUB_STATUS_C_PORT_CONNECTION 150 uspace/drv/bus/usb/vhc/hub/hub.c set_port_status_change(port, HUB_STATUS_C_PORT_CONNECTION);
HUB_STATUS_C_PORT_CONNECTION 176 uspace/drv/bus/usb/vhc/hub/hub.c set_port_status_change(port, HUB_STATUS_C_PORT_CONNECTION);
HUB_STATUS_C_PORT_CONNECTION 237 uspace/drv/bus/usb/vhc/hub/hub.c clear_port_status_change(port, HUB_STATUS_C_PORT_CONNECTION);
HUB_STATUS_C_PORT_CONNECTION 163 uspace/drv/bus/usb/vhc/hub/virthubops.c hub_clear_port_status_change(hub, port, HUB_STATUS_C_PORT_CONNECTION);
HelenOS homepage, sources at GitHub