ukphy_subr.c revision 158744 
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#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/sys/dev/mii/ukphy_subr.c 158744 2006-05-19 03:51:42Z yongari $");
42
43/*
44 * Subroutines shared by the ukphy driver and other PHY drivers.
45 */
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/socket.h>
50#include <sys/module.h>
51#include <sys/bus.h>
52
53#include <net/if.h>
54#include <net/if_media.h>
55
56#include <dev/mii/mii.h>
57#include <dev/mii/miivar.h>
58
59#include "miibus_if.h"
60
61/*
62 * Media status subroutine.  If a PHY driver does media detection simply
63 * by decoding the NWay autonegotiation, use this routine.
64 */
65void
66ukphy_status(struct mii_softc *phy)
67{
68	struct mii_data *mii = phy->mii_pdata;
69	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
70	int bmsr, bmcr, anlpar, gtcr, gtsr;
71
72	mii->mii_media_status = IFM_AVALID;
73	mii->mii_media_active = IFM_ETHER;
74
75	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
76	if (bmsr & BMSR_LINK)
77		mii->mii_media_status |= IFM_ACTIVE;
78
79	bmcr = PHY_READ(phy, MII_BMCR);
80	if (bmcr & BMCR_ISO) {
81		mii->mii_media_active |= IFM_NONE;
82		mii->mii_media_status = 0;
83		return;
84	}
85
86	if (bmcr & BMCR_LOOP)
87		mii->mii_media_active |= IFM_LOOP;
88
89	if (bmcr & BMCR_AUTOEN) {
90		/*
91		 * NWay autonegotiation takes the highest-order common
92		 * bit of the ANAR and ANLPAR (i.e. best media advertised
93		 * both by us and our link partner).
94		 */
95		if ((bmsr & BMSR_ACOMP) == 0) {
96			/* Erg, still trying, I guess... */
97			mii->mii_media_active |= IFM_NONE;
98			return;
99		}
100
101		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
102		if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
103		    (phy->mii_extcapabilities &
104		    (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) {
105			gtcr = PHY_READ(phy, MII_100T2CR);
106			gtsr = PHY_READ(phy, MII_100T2SR);
107		} else
108			gtcr = gtsr = 0;
109
110		if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
111			mii->mii_media_active |= IFM_1000_T|IFM_FDX;
112		else if ((gtcr & GTCR_ADV_1000THDX) &&
113		    (gtsr & GTSR_LP_1000THDX))
114			mii->mii_media_active |= IFM_1000_T;
115		else if (anlpar & ANLPAR_T4)
116			mii->mii_media_active |= IFM_100_T4;
117		else if (anlpar & ANLPAR_TX_FD)
118			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
119		else if (anlpar & ANLPAR_TX)
120			mii->mii_media_active |= IFM_100_TX;
121		else if (anlpar & ANLPAR_10_FD)
122			mii->mii_media_active |= IFM_10_T|IFM_FDX;
123		else if (anlpar & ANLPAR_10)
124			mii->mii_media_active |= IFM_10_T;
125		else
126			mii->mii_media_active |= IFM_NONE;
127	} else
128		mii->mii_media_active = ife->ifm_media;
129}
130