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MIIBUS(4)		 BSD Kernel Interfaces Manual		     MIIBUS(4)

     miibus -- IEEE 802.3 Media	Independent Interface network bus

     For most network interface	cards (NIC):
     device miibus

     The miibus	driver provides	an interconnection between the Media Access
     Control (MAC) sublayer, the Physical Layer	entities (PHY),	Station	Man-
     agement (STA) entities, and the PHY Layer as defined by the IEEE 802.3

     The miibus	layer allows network device drivers to share common support
     code for various external PHY devices.  Most 10/100 network interface
     cards either use an MII transceiver or have built-in transceivers that
     can be programmed using an	MII interface.	The miibus driver currently
     handles all of the	media detection, selection, and	reporting using	the
     ifmedia interface.	 A generic driver has been included for	all PHYs that
     are not handled by	a specific driver, this	is possible because all	10/100
     PHYs implement the	same general register set along	with their vendor spe-
     cific register set.

     The following network device drivers use the miibus interface:

     aue(4)  ADMtek USB	Ethernet
     axe(4)  ASIX Electronics AX88172 USB Ethernet
     bfe(4)  Broadcom BCM4401 Ethernet
     bge(4)  Broadcom BCM570xx Gigabit Ethernet
     dc(4)   DEC/Intel 21143 and various workalikes
     ed(4)   NE[12]000,	SMC Ultra, 3c503, DS8390 cards
     fxp(4)  Intel EtherExpress	PRO/100B
     gem(4)  Sun ERI, Sun GEM and Apple	GMAC Ethernet
     gx(4)   Intel Pro/1000 82542/82543	Gigabit	Ethernet
     hme(4)  Sun HME Ethernet
     lge(4)  Level 1 LXT1001 NetCellerator Gigabit Ethernet
     my(4)   Myson Technologies	PCI Ethernet adaptors
     nge(4)  National Semiconductor DP83820/DP83821 Gigabit Ethernet
     pcn(4)  AMD Am79C97x PCI 10/100
     re(4)   RealTek 8139C+/8169/8169S/8110S
     rl(4)   RealTek 8129/8139
     rue(4)  RealTek RTL8150 USB To Fast Ethernet
     sf(4)   Adaptec AIC-6915
     sis(4)  Silicon Integrated	Systems	SiS 900/SiS 7016
     sk(4)   SysKonnect	SK-984x	and SK-982x Gigabit Ethernet
     ste(4)  Sundance ST201 (D-Link DFE-550TX)
     tl(4)   Texas Instruments ThunderLAN
     tx(4)   SMC EtherPower II (83c170)
	     Davicom DM9601 USB	Ethernet
     vr(4)   VIA Rhine,	Rhine II
     wb(4)   Winbond W89C840F
     xl(4)   3Com 3c90x

     The implementation	of miibus was originally intended to have similar API
     interfaces	to BSD/OS 3.0 and NetBSD, but as a result are not well behaved
     newbus device drivers.

     arp(4), aue(4), axe(4), bfe(4), bge(4), dc(4), ed(4), fxp(4), gem(4),
     gx(4), hme(4), lge(4), my(4), netintro(4),	nge(4),	pcn(4),	re(4), rl(4),
     rue(4), sf(4), sis(4), sk(4), ste(4), tl(4), tx(4), udav(4), vr(4),
     wb(4), xl(4)

     More information on MII can be found in the IEEE 802.3 Standard.

     The miibus	driver first appeared in FreeBSD 3.3.

     This manual page was written by Tom Rhodes	<>.

BSD			       February	15, 2003			   BSD


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