2015-12-26 02:31:39 +00:00
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.\" Written by Landon Fuller for the FreeBSD Project.
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.\" Based on the miibus(4) manual page written by Tom Rhodes.
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.\" Please see the /usr/src/COPYRIGHT file for copyright information.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 17, 2015
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.Dt MDIO 4
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.Os
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.Sh NAME
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.Nm mdio
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.Nd IEEE 802.3 Management Data Input/Output interface
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device mdio"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides an interconnection between the Media Access Control (MAC)
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sublayer and Physical Layer (PHY) entities' control and status registers,
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as defined by the IEEE 802.3 Standard.
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.Pp
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The
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.Nm
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layer allows device drivers to share common support code for various
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external PHY devices.
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.Pp
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.Tn MDIO
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is one of two signal interfaces that comprise the
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Media Independent Interface (MII) defined by the IEEE 802.3
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2016-06-08 08:50:35 +00:00
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Standard.
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The
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2015-12-26 02:31:39 +00:00
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.Xr miibus 4
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driver provides support for devices that require full
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.Tn MII
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support.
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.Sh SEE ALSO
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.Xr miibus 4
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.Sh STANDARDS
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More information on
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.Tn MDIO
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can be found in the IEEE 802.3 Standard.
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 10.0 .
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.Sh AUTHORS
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The driver was written by
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.An Stefan Bethke Aq Mt stb@lassitu.de .
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