1 /* $NetBSD: exphy.c,v 1.16 1999/04/23 04:24:32 thorpej Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 1998, 1999 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 /*-
36 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 */
58
59 #include <sys/cdefs.h>
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
80 static int xlphy_probe(device_t);
81 static int xlphy_attach(device_t);
82
83 static device_method_t xlphy_methods[] = {
84 /* device interface */
85 DEVMETHOD(device_probe, xlphy_probe),
86 DEVMETHOD(device_attach, xlphy_attach),
87 DEVMETHOD(device_detach, mii_phy_detach),
88 DEVMETHOD(device_shutdown, bus_generic_shutdown),
89 DEVMETHOD_END
90 };
91
92 static driver_t xlphy_driver = {
93 "xlphy",
94 xlphy_methods,
95 sizeof(struct mii_softc)
96 };
97
98 DRIVER_MODULE(xlphy, miibus, xlphy_driver, 0, 0);
99
100 static int xlphy_service(struct mii_softc *, struct mii_data *, int);
101 static void xlphy_reset(struct mii_softc *);
102
103 /*
104 * Some 3Com internal PHYs report zero for OUI and model, others use
105 * actual values.
106 * Note that the 3Com internal PHYs having OUI 0x105a and model 0 are
107 * handled fine by ukphy(4); they can be isolated and don't require
108 * special treatment after reset.
109 */
110 static const struct mii_phydesc xlphys[] = {
111 { 0, 0, "3Com internal media interface" },
112 MII_PHY_DESC(xxBROADCOM, 3C905C),
113 MII_PHY_END
114 };
115
116 static const struct mii_phy_funcs xlphy_funcs = {
117 xlphy_service,
118 ukphy_status,
119 xlphy_reset
120 };
121
122 static int
xlphy_probe(device_t dev)123 xlphy_probe(device_t dev)
124 {
125
126 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
127 "xl") == 0)
128 return (mii_phy_dev_probe(dev, xlphys, BUS_PROBE_DEFAULT));
129 return (ENXIO);
130 }
131
132 static int
xlphy_attach(device_t dev)133 xlphy_attach(device_t dev)
134 {
135
136 /*
137 * The 3Com PHY can never be isolated.
138 */
139 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
140 &xlphy_funcs, 1);
141 return (0);
142 }
143
144 static int
xlphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)145 xlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
146 {
147
148 switch (cmd) {
149 case MII_POLLSTAT:
150 break;
151
152 case MII_MEDIACHG:
153 mii_phy_setmedia(sc);
154 break;
155
156 case MII_TICK:
157 /*
158 * The 3Com PHY's autonegotiation doesn't need to be
159 * kicked; it continues in the background.
160 */
161 break;
162 }
163
164 /* Update the media status. */
165 PHY_STATUS(sc);
166
167 /* Callback if something changed. */
168 mii_phy_update(sc, cmd);
169 return (0);
170 }
171
172 static void
xlphy_reset(struct mii_softc * sc)173 xlphy_reset(struct mii_softc *sc)
174 {
175
176 mii_phy_reset(sc);
177
178 /*
179 * XXX 3Com PHY doesn't set the BMCR properly after
180 * XXX reset, which breaks autonegotiation.
181 */
182 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
183 }
184