HelenOS sources
CLASS_REQ_OUT 63 uspace/app/vuhid/main.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_INTERFACE, USB_HIDREQ_SET_PROTOCOL),
CLASS_REQ_OUT 68 uspace/app/vuhid/main.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_INTERFACE, USB_HIDREQ_SET_REPORT),
CLASS_REQ_OUT 588 uspace/drv/bus/usb/ehci/ehci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 593 uspace/drv/bus/usb/ehci/ehci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 608 uspace/drv/bus/usb/ehci/ehci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 613 uspace/drv/bus/usb/ehci/ehci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 507 uspace/drv/bus/usb/ohci/ohci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 512 uspace/drv/bus/usb/ohci/ohci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 527 uspace/drv/bus/usb/ohci/ohci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 532 uspace/drv/bus/usb/ohci/ohci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 465 uspace/drv/bus/usb/uhci/uhci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 474 uspace/drv/bus/usb/uhci/uhci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 493 uspace/drv/bus/usb/uhci/uhci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 502 uspace/drv/bus/usb/uhci/uhci_rh.c CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 364 uspace/drv/bus/usb/vhc/hub/virthubops.c CLASS_REQ_OUT(REC_DEVICE, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 369 uspace/drv/bus/usb/vhc/hub/virthubops.c CLASS_REQ_OUT(REC_OTHER, USB_HUB_REQUEST_CLEAR_FEATURE),
CLASS_REQ_OUT 394 uspace/drv/bus/usb/vhc/hub/virthubops.c CLASS_REQ_OUT(REC_DEVICE, USB_HUB_REQUEST_SET_FEATURE),
CLASS_REQ_OUT 399 uspace/drv/bus/usb/vhc/hub/virthubops.c CLASS_REQ_OUT(REC_OTHER, USB_HUB_REQUEST_SET_FEATURE),
HelenOS homepage, sources at GitHub