USBFN_EVENT - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// usbfnbase.h

typedef enum _USBFN_EVENT {
  UsbfnEventMinimum,
  UsbfnEventAttach,
  UsbfnEventReset,
  UsbfnEventDetach,
  UsbfnEventSuspend,
  UsbfnEventResume,
  UsbfnEventSetupPacket,
  UsbfnEventConfigured,
  UsbfnEventUnConfigured,
  UsbfnEventPortType,
  UsbfnEventBusTearDown,
  UsbfnEventSetInterface,
  UsbfnEventMaximum
} USBFN_EVENT, *PUSBFN_EVENT;
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (ne-usbfnbase-_usbfn_event)

_USBFN_EVENT enumeration

Description

Defines notifications sent to class drivers.

Constants

UsbfnEventMinimum

The minimum value in this enumeration.

UsbfnEventAttach

VBUS is powered. No action is required.

UsbfnEventReset

USBFN has completed a USB Reset. If previously configured, class drivers should reset their state. Transfer requests will be cancelled.

UsbfnEventDetach

VBUS is no longer powered. If previously configured, class drivers should reset their state. Transfer requests will be cancelled. The BusSpeed field of the notification is set appropriately.

UsbfnEventSuspend

There have been no SOF packets on the bus for 3ms. If a class driver wants to issue a remote wake up, the driver must use IOCTL_INTERNAL_USBFN_SIGNAL_REMOTE_WAKEUP or IOCTL_INTERNAL_USBFN_TRANSFER_IN.

UsbfnEventResume

USBFN has resumed from suspend to the previous state.

UsbfnEventSetupPacket

USBFN has received a setup packet with bmRequestType.Type set to BMREQUEST_CLASS and bmRequestType.Recipient set to BMREQUEST_TO_INTERFACE. USBFN forwarded the setup packet to the class driver specified in wIndex.LowByte.

The setup packet is available in the SetupPacket field of the event. If the control transfer does not require a data stage, class drivers should respond with IOCTL_INTERNAL_USBFN_CONTROL_STATUS_HANDSHAKE_OUT. If a data stage is required, class drivers should respond with one or more IOCTL_INTERNAL_USBFN_TRANSFER_IN or IOCTL_INTERNAL_USBFN_TRANSFER_OUT, followed by IOCTL_INTERNAL_USBFN_CONTROL_STATUS_HANDSHAKE_IN or IOCTL_INTERNAL_USBFN_CONTROL_STATUS_HANDSHAKE_OUT in the opposite direction.

UsbfnEventConfigured

USBFN has received a SET_CONFIGURATION setup packet. Transfer requests from class drivers are now permitted. The ConfigurationValue of the notification is set to wValue.W.

UsbfnEventUnConfigured

USBFN has received a SET_CONFIGURATION setup packet with wValue.W set to 0. If previously configured, class drivers should reset their state. Transfer requests will be cancelled.

UsbfnEventPortType

Deprecated.

UsbfnEventBusTearDown

Deprecated.

UsbfnEventSetInterface

USBFN has received a SET_INTERFACE setup packet. On receiving this notification the class driver should query for the new endpoint set for the interface.

UsbfnEventMaximum

The minimum value in this enumeration.

View the official Windows Driver Kit DDI reference

Edit description on GitHub