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USB_CONTROLLER_INFO_0 structure

The USB_CONTROLLER_INFO_0 structure is used with the IOCTL_USB_USER_REQUEST I/O control request to retrieve information about the USB host controller.

Syntax


typedef struct _USB_CONTROLLER_INFO_0 {
  ULONG                 PciVendorId;
  ULONG                 PciDeviceId;
  ULONG                 PciRevision;
  ULONG                 NumberOfRootPorts;
  USB_CONTROLLER_FLAVOR ControllerFlavor;
  ULONG                 HcFeatureFlags;
} USB_CONTROLLER_INFO_0, *PUSB_CONTROLLER_INFO_0;

Members

PciVendorId

The vendor identifier that is associated with the host controller device.

PciDeviceId

The device identifier that is associated with the host controller.

PciRevision

The revision number of the host controller device.

NumberOfRootPorts

The number of root hub ports that the host controller has.

Note  In Windows 8, the USB 3.0 driver stack does not include the number of SuperSpeed hubs in the reported NumberOfRootPorts value.

ControllerFlavor

A USB_CONTROLLER_FLAVOR-typed enumerator that specifies the type of controller.

HcFeatureFlags

A bitwise OR of some combination of the following host controller feature flags.

Host controller featureMeaning

USB_HC_FEATURE_FLAG_PORT_POWER_SWITCHING

Power switching is enabled on the host controller. This flag allows powering of hot-plug devices.

USB_HC_FEATURE_FLAG_SEL_SUSPEND

Selective suspend is enabled on the host controller.

USB_HC_FEATURE_LEGACY_BIOS

The host controller has a legacy BIOS.

 

Note  In Windows 8, the underlying USB 3.0 driver stack does not set any host controller feature flags in HcFeatureFlags.

Remarks

The USB_CONTROLLER_INFO_0 structure is used with the USBUSER_GET_CONTROLLER_INFO_0 user-mode request. For a description of this request, see IOCTL_USB_USER_REQUEST.

Requirements

Header

Usbuser.h (include Usbuser.h)

See also

IOCTL_USB_USER_REQUEST
USB_CONTROLLER_FLAVOR

 

 

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