IOCTL_USB_HUB_CYCLE_PORT - NtDoc

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

// CTL_CODE(0x0022, 0x111, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_USB_HUB_CYCLE_PORT 0x00220444
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Windows Driver Kit DDI reference (ni-usbioctl-ioctl_usb_hub_cycle_port)

IOCTL_USB_HUB_CYCLE_PORT IOCTL

Description

The IOCTL_USB_HUB_CYCLE_PORT I/O control request power-cycles the port that is associated with the PDO that receives the request.

IOCTL_USB_HUB_CYCLE_PORT is a user-mode I/O control request. This request targets the USB hub device (GUID_DEVINTERFACE_USB_HUB).

Parameters

Major code

Input buffer

The AssociatedIrp.SystemBuffer member points to a caller-allocated USB_CYCLE_PORT_PARAMS structure that specifies the port number.

Input buffer length

The size of a USB_CYCLE_PORT_PARAMS structure.

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

Status block

The USB stack sets Irp->IoStatus.Status to STATUS_SUCCESS if the request is successful. Otherwise, the USB stack sets Status to the appropriate error condition, such as STATUS_INVALID_PARAMETER or STATUS_INSUFFICIENT_RESOURCES.

Remarks

You can also power cycle the port by using the Device Manager's Enable/Disable feature. This feature causes the bus driver to reset the device. Alternatively, you can use DevCon to enable or disable the device.

The executable for DevCon can be found in the <install_path>\WinDDK\build_number\tools\devcon\<arch>\devcon.exe folder.

View the official Windows Driver Kit DDI reference

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