ukphy_subr.c revision 95723 
1/*	$NetBSD: ukphy_subr.c,v 1.2 1998/11/05 04:08:02 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center, and by Frank van der Linden.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the NetBSD
22 *	Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40/*
41 * Subroutines shared by the ukphy driver and other PHY drivers.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/socket.h>
47#include <sys/module.h>
48#include <sys/bus.h>
49
50#include <net/if.h>
51#include <net/if_media.h>
52
53#include <dev/mii/mii.h>
54#include <dev/mii/miivar.h>
55
56#include "miibus_if.h"
57
58#if !defined(lint)
59static const char rcsid[] =
60  "$FreeBSD: head/sys/dev/mii/ukphy_subr.c 95723 2002-04-29 13:35:31Z phk $";
61#endif
62
63/*
64 * Media status subroutine.  If a PHY driver does media detection simply
65 * by decoding the NWay autonegotiation, use this routine.
66 */
67void
68ukphy_status(struct mii_softc *phy)
69{
70	struct mii_data *mii = phy->mii_pdata;
71	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
72	int bmsr, bmcr, anlpar;
73
74	mii->mii_media_status = IFM_AVALID;
75	mii->mii_media_active = IFM_ETHER;
76
77	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
78	if (bmsr & BMSR_LINK)
79		mii->mii_media_status |= IFM_ACTIVE;
80
81	bmcr = PHY_READ(phy, MII_BMCR);
82	if (bmcr & BMCR_ISO) {
83		mii->mii_media_active |= IFM_NONE;
84		mii->mii_media_status = 0;
85		return;
86	}
87
88	if (bmcr & BMCR_LOOP)
89		mii->mii_media_active |= IFM_LOOP;
90
91	if (bmcr & BMCR_AUTOEN) {
92		/*
93		 * NWay autonegotiation takes the highest-order common
94		 * bit of the ANAR and ANLPAR (i.e. best media advertised
95		 * both by us and our link partner).
96		 */
97		if ((bmsr & BMSR_ACOMP) == 0) {
98			/* Erg, still trying, I guess... */
99			mii->mii_media_active |= IFM_NONE;
100			return;
101		}
102
103		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
104		if (anlpar & ANLPAR_T4)
105			mii->mii_media_active |= IFM_100_T4;
106		else if (anlpar & ANLPAR_TX_FD)
107			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
108		else if (anlpar & ANLPAR_TX)
109			mii->mii_media_active |= IFM_100_TX;
110		else if (anlpar & ANLPAR_10_FD)
111			mii->mii_media_active |= IFM_10_T|IFM_FDX;
112		else if (anlpar & ANLPAR_10)
113			mii->mii_media_active |= IFM_10_T;
114		else
115			mii->mii_media_active |= IFM_NONE;
116	} else
117		mii->mii_media_active = ife->ifm_media;
118}
119