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+.\"	$NetBSD: usbd_status.9,v 1.3 2021/12/11 19:24:19 mrg Exp $
+.\"
+.\" Copyright (c) 2012 Matthew R. Green
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd May 12, 2012
+.Dt USBD_STATUS 9
+.Os
+.Sh NAME
+.Nm usbd_status
+.Nd USB device drivers interface return status values
+.Sh SYNOPSIS
+.In dev/usb/usbdi.h
+.Sh DESCRIPTION
+This documents the full list of return values used by the generic USB code.
+Interface-specific definitions will be given with interface.
+.Sh RETURN VALUES
+Return values are split into two main groups: expected values
+and error values.
+.Pp
+There are only two expected values:
+.Bl -tag -width indent
+.It Dv USBD_NORMAL_COMPLETION
+The operation completed successfully.
+.It Dv USBD_IN_PROGRESS
+The operation was successfully submitted, usually part of
+an asynchronous operation.
+.El
+.Pp
+These are the error values:
+.Bl -tag -width indent
+.It Dv USBD_PENDING_REQUESTS
+The requested operation could not be completed due to pending
+requests, usually from a pipe close operation.
+.It Dv USBD_NOT_STARTED
+The initial status of a USB transfer.
+See
+.Xr usbdi 9
+for more details about USB transfers.
+.It Dv USBD_INVAL
+Invalid arguments were supplied for the requested operation.
+.It Dv USBD_NOMEM
+No memory could be allocated.
+.It Dv USBD_CANCELLED
+The USB transfer has been cancelled, and not completed.
+.It Dv USBD_BAD_ADDRESS
+The requested USB pipe could not be found.
+See
+.Xr usbdi 9
+for more details about USB pipes.
+.It Dv USBD_IN_USE
+The requested operation could not be performed due to the device
+having active connections, such as USB audio device currently playing.
+.It Dv USBD_NO_ADDR
+USB bus has reached its maximum limit of devices.
+.It Dv USBD_SET_ADDR_FAILED
+Call to
+.Fn usbd_set_address
+failed during new USB device discovery.
+.It Dv USBD_NO_POWER
+New device has requested more power than is available.
+.It Dv USBD_TOO_DEEP
+.\" XXXMRG why do we do this?  it's only 5 right now.
+New USB Hub too deep from the root.
+.It Dv USBD_IOERROR
+Non-specific error happened during IO.
+.It Dv USBD_NOT_CONFIGURED
+USB device is not configured; it has no configuration descriptor.
+.It Dv USBD_TIMEOUT
+Operation timed out.
+.It Dv USBD_SHORT_XFER
+USB transfer succeeded but not all requested data was returned.
+.It Dv USBD_STALLED
+USB controller has stalled (controller specific.)
+.It Dv USBD_INTERRUPTED
+Process was interrupted by external means (such as a signal) while
+waiting for a transfer to complete.
+.El
+.Sh SEE ALSO
+.Xr usb 4 ,
+.Xr usbdi 9
+.Sh HISTORY
+This
+.Nm
+interface first appeared in
+.Nx 1.4 .