1/*	$NetBSD: ukphy_subr.c,v 1.2 1998/11/05 04:08:02 thorpej Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5 *
6 * Copyright (c) 1998 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
11 * NASA Ames Research Center, and by Frank van der Linden.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: releng/12.0/sys/dev/mii/ukphy_subr.c 326255 2017-11-27 14:52:40Z pfg $");
37
38/*
39 * Subroutines shared by the ukphy driver and other PHY drivers.
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/socket.h>
45#include <sys/module.h>
46#include <sys/bus.h>
47
48#include <net/if.h>
49#include <net/if_media.h>
50
51#include <dev/mii/mii.h>
52#include <dev/mii/miivar.h>
53
54#include "miibus_if.h"
55
56/*
57 * Media status subroutine.  If a PHY driver does media detection simply
58 * by decoding the NWay autonegotiation, use this routine.
59 */
60void
61ukphy_status(struct mii_softc *phy)
62{
63	struct mii_data *mii = phy->mii_pdata;
64	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
65	int bmsr, bmcr, anlpar, gtcr, gtsr;
66
67	mii->mii_media_status = IFM_AVALID;
68	mii->mii_media_active = IFM_ETHER;
69
70	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
71	if (bmsr & BMSR_LINK)
72		mii->mii_media_status |= IFM_ACTIVE;
73
74	bmcr = PHY_READ(phy, MII_BMCR);
75	if (bmcr & BMCR_ISO) {
76		mii->mii_media_active |= IFM_NONE;
77		mii->mii_media_status = 0;
78		return;
79	}
80
81	if (bmcr & BMCR_LOOP)
82		mii->mii_media_active |= IFM_LOOP;
83
84	if (bmcr & BMCR_AUTOEN) {
85		/*
86		 * NWay autonegotiation takes the highest-order common
87		 * bit of the ANAR and ANLPAR (i.e. best media advertised
88		 * both by us and our link partner).
89		 */
90		if ((bmsr & BMSR_ACOMP) == 0) {
91			/* Erg, still trying, I guess... */
92			mii->mii_media_active |= IFM_NONE;
93			return;
94		}
95
96		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
97		if ((phy->mii_flags & MIIF_HAVE_GTCR) != 0 &&
98		    (phy->mii_extcapabilities &
99		    (EXTSR_1000THDX | EXTSR_1000TFDX)) != 0) {
100			gtcr = PHY_READ(phy, MII_100T2CR);
101			gtsr = PHY_READ(phy, MII_100T2SR);
102		} else
103			gtcr = gtsr = 0;
104
105		if ((gtcr & GTCR_ADV_1000TFDX) && (gtsr & GTSR_LP_1000TFDX))
106			mii->mii_media_active |= IFM_1000_T|IFM_FDX;
107		else if ((gtcr & GTCR_ADV_1000THDX) &&
108		    (gtsr & GTSR_LP_1000THDX))
109			mii->mii_media_active |= IFM_1000_T|IFM_HDX;
110		else if (anlpar & ANLPAR_TX_FD)
111			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
112		else if (anlpar & ANLPAR_T4)
113			mii->mii_media_active |= IFM_100_T4|IFM_HDX;
114		else if (anlpar & ANLPAR_TX)
115			mii->mii_media_active |= IFM_100_TX|IFM_HDX;
116		else if (anlpar & ANLPAR_10_FD)
117			mii->mii_media_active |= IFM_10_T|IFM_FDX;
118		else if (anlpar & ANLPAR_10)
119			mii->mii_media_active |= IFM_10_T|IFM_HDX;
120		else
121			mii->mii_media_active |= IFM_NONE;
122
123		if ((mii->mii_media_active & IFM_1000_T) != 0 &&
124		    (gtsr & GTSR_MS_RES) != 0)
125			mii->mii_media_active |= IFM_ETH_MASTER;
126
127		if ((mii->mii_media_active & IFM_FDX) != 0)
128			mii->mii_media_active |= mii_phy_flowstatus(phy);
129	} else
130		mii->mii_media_active = ife->ifm_media;
131}
132