1/* $NetBSD: exphy.c,v 1.16 1999/04/23 04:24:32 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 1998, 1999 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 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*-
34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 */
56
57#include <sys/cdefs.h>
58__FBSDID("$FreeBSD: head/sys/dev/mii/exphy.c 221407 2011-05-03 19:51:29Z marius $");
59
60/*
61 * driver for 3Com internal PHYs
62 */
63
64#include <sys/param.h>
65#include <sys/systm.h>
66#include <sys/kernel.h>
67#include <sys/socket.h>
68#include <sys/module.h>
69#include <sys/bus.h>
70
71#include <net/if.h>
72#include <net/if_media.h>
73
74#include <dev/mii/mii.h>
75#include <dev/mii/miivar.h>
76#include "miidevs.h"
77
78#include "miibus_if.h"
79
80static int exphy_probe(device_t);
81static int exphy_attach(device_t);
82
83static device_method_t exphy_methods[] = {
84 /* device interface */
85 DEVMETHOD(device_probe, exphy_probe),
86 DEVMETHOD(device_attach, exphy_attach),
87 DEVMETHOD(device_detach, mii_phy_detach),
88 DEVMETHOD(device_shutdown, bus_generic_shutdown),
89 { 0, 0 }
90};
91
92static devclass_t exphy_devclass;
93
94static driver_t exphy_driver = {
95 "xlphy",
96 exphy_methods,
97 sizeof(struct mii_softc)
98};
99
100DRIVER_MODULE(xlphy, miibus, exphy_driver, exphy_devclass, 0, 0);
101
102static int exphy_service(struct mii_softc *, struct mii_data *, int);
103static void exphy_reset(struct mii_softc *);
104
105/*
106 * Some 3Com internal PHYs report zero for OUI and model, others use
107 * actual values.
108 * Note that the 3Com internal PHYs having OUI 0x105a and model 0 are
109 * handled fine by ukphy(4); they can be isolated and don't require
110 * special treatment after reset.
111 */
112static const struct mii_phydesc exphys[] = {
113 { 0, 0, "3Com internal media interface" },
114 MII_PHY_DESC(xxBROADCOM, 3C905C),
115 MII_PHY_END
116};
117
118static const struct mii_phy_funcs exphy_funcs = {
119 exphy_service,
120 ukphy_status,
121 exphy_reset
122};
123
124static int
125exphy_probe(device_t dev)
126{
127
128 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
129 "xl") == 0)
130 return (mii_phy_dev_probe(dev, exphys, BUS_PROBE_DEFAULT));
131 return (ENXIO);
132}
133
134static int
135exphy_attach(device_t dev)
136{
137
138 /*
139 * The 3Com PHY can never be isolated.
140 */
141 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
142 &exphy_funcs, 1);
143 return (0);
144}
145
146static int
147exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
148{
149
150 switch (cmd) {
151 case MII_POLLSTAT:
152 break;
153
154 case MII_MEDIACHG:
155 /*
156 * If the interface is not up, don't do anything.
157 */
158 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
159 break;
160
161 mii_phy_setmedia(sc);
162 break;
163
164 case MII_TICK:
165 /*
166 * Is the interface even up?
167 */
168 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
169 return (0);
170
171 /*
172 * The 3Com PHY's autonegotiation doesn't need to be
173 * kicked; it continues in the background.
174 */
175 break;
176 }
177
178 /* Update the media status. */
179 PHY_STATUS(sc);
180
181 /* Callback if something changed. */
182 mii_phy_update(sc, cmd);
183 return (0);
184}
185
186static void
187exphy_reset(struct mii_softc *sc)
188{
189
190 mii_phy_reset(sc);
191
192 /*
193 * XXX 3Com PHY doesn't set the BMCR properly after
194 * XXX reset, which breaks autonegotiation.
195 */
196 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
197}