ukphy_subr.c revision 50477 
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/kernel.h>
47#include <sys/malloc.h>
48#include <sys/socket.h>
49#include <sys/module.h>
50#include <sys/bus.h>
51
52#include <net/if.h>
53#include <net/if_media.h>
54
55#include <dev/mii/mii.h>
56#include <dev/mii/miivar.h>
57
58#include "miibus_if.h"
59
60#if !defined(lint)
61static const char rcsid[] =
62  "$FreeBSD: head/sys/dev/mii/ukphy_subr.c 50477 1999-08-28 01:08:13Z peter $";
63#endif
64
65/*
66 * Media status subroutine.  If a PHY driver does media detection simply
67 * by decoding the NWay autonegotiation, use this routine.
68 */
69void
70ukphy_status(phy)
71	struct mii_softc *phy;
72{
73	struct mii_data *mii = phy->mii_pdata;
74	int bmsr, bmcr, anlpar;
75
76	mii->mii_media_status = IFM_AVALID;
77	mii->mii_media_active = IFM_ETHER;
78
79	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
80	if (bmsr & BMSR_LINK)
81		mii->mii_media_status |= IFM_ACTIVE;
82
83	bmcr = PHY_READ(phy, MII_BMCR);
84	if (bmcr & BMCR_ISO) {
85		mii->mii_media_active |= IFM_NONE;
86		mii->mii_media_status = 0;
87		return;
88	}
89
90	if (bmcr & BMCR_LOOP)
91		mii->mii_media_active |= IFM_LOOP;
92
93	if (bmcr & BMCR_AUTOEN) {
94		/*
95		 * NWay autonegotiation takes the highest-order common
96		 * bit of the ANAR and ANLPAR (i.e. best media advertised
97		 * both by us and our link partner).
98		 */
99		if ((bmsr & BMSR_ACOMP) == 0) {
100			/* Erg, still trying, I guess... */
101			mii->mii_media_active |= IFM_NONE;
102			return;
103		}
104
105		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
106		if (anlpar & ANLPAR_T4)
107			mii->mii_media_active |= IFM_100_T4;
108		else if (anlpar & ANLPAR_TX_FD)
109			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
110		else if (anlpar & ANLPAR_TX)
111			mii->mii_media_active |= IFM_100_TX;
112		else if (anlpar & ANLPAR_10_FD)
113			mii->mii_media_active |= IFM_10_T|IFM_FDX;
114		else if (anlpar & ANLPAR_10)
115			mii->mii_media_active |= IFM_10_T;
116		else
117			mii->mii_media_active |= IFM_NONE;
118	} else
119		mii->mii_media_active = mii_media_from_bmcr(bmcr);
120}
121