HelenOS sources

TRB_SET_EP        546 uspace/drv/bus/usb/xhci/commands.c 	TRB_SET_EP(cmd->_header.trb, cmd->endpoint_id);
TRB_SET_EP        560 uspace/drv/bus/usb/xhci/commands.c 	TRB_SET_EP(cmd->_header.trb, cmd->endpoint_id);
TRB_SET_EP        575 uspace/drv/bus/usb/xhci/commands.c 	TRB_SET_EP(cmd->_header.trb, cmd->endpoint_id);
HelenOS homepage, sources at GitHub