1/* $NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh Exp $ */
2
3/*-
4 * Copyright (c) 1998, 1999, 2000 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/*
58 * driver for 3Com internal PHYs
59 */
60
61#include <sys/cdefs.h>
62__KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh Exp $");
63
64#include <sys/param.h>
65#include <sys/systm.h>
66#include <sys/kernel.h>
67#include <sys/device.h>
68#include <sys/socket.h>
69
70#include <net/if.h>
71#include <net/if_media.h>
72
73#include <dev/mii/mii.h>
74#include <dev/mii/miivar.h>
75#include <dev/mii/miidevs.h>
76
77static int exphymatch(device_t, cfdata_t, void *);
78static void exphyattach(device_t, device_t, void *);
79
80CFATTACH_DECL_NEW(exphy, sizeof(struct mii_softc),
81 exphymatch, exphyattach, mii_phy_detach, mii_phy_activate);
82
83static int exphy_service(struct mii_softc *, struct mii_data *, int);
84static void exphy_reset(struct mii_softc *);
85
86static const struct mii_phy_funcs exphy_funcs = {
87 exphy_service, ukphy_status, exphy_reset,
88};
89
90static int
91exphymatch(device_t parent, cfdata_t match, void *aux)
92{
93 struct mii_attach_args *ma = aux;
94
95 /*
96 * Argh, 3Com PHY reports oui == 0 model == 0!
97 */
98 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 &&
99 MII_MODEL(ma->mii_id2) != 0)
100 return (0);
101
102 /*
103 * Make sure the parent is an `ex'.
104 */
105 if (!device_is_a(parent, "ex"))
106 return (0);
107
108 return (10);
109}
110
111static void
112exphyattach(device_t parent, device_t self, void *aux)
113{
114 struct mii_softc *sc = device_private(self);
115 struct mii_attach_args *ma = aux;
116 struct mii_data *mii = ma->mii_data;
117
118 aprint_naive(": Media interface\n");
119 aprint_normal(": 3Com internal media interface\n");
120
121 sc->mii_dev = self;
122 sc->mii_inst = mii->mii_instance;
123 sc->mii_phy = ma->mii_phyno;
124 sc->mii_funcs = &exphy_funcs;
125 sc->mii_pdata = mii;
126 sc->mii_flags = ma->mii_flags;
127 sc->mii_anegticks = MII_ANEGTICKS;
128
129 /*
130 * The 3Com PHY can never be isolated, so never allow non-zero
131 * instances!
132 */
133 if (mii->mii_instance != 0) {
134 aprint_error_dev(self,
135 "ignoring this PHY, non-zero instance\n");
136 return;
137 }
138 sc->mii_flags |= MIIF_NOISOLATE;
139
140 PHY_RESET(sc);
141
142 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
144 aprint_error_dev(self, "no media present\n");
145 else {
146 aprint_normal_dev(self, "");
147 mii_phy_add_media(sc);
148 aprint_normal("\n");
149 }
150}
151
152static int
153exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
154{
155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
156
157 /*
158 * We can't isolate the 3Com PHY, so it has to be the only one!
159 */
160 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
161 panic("exphy_service: can't isolate 3Com PHY");
162
163 switch (cmd) {
164 case MII_POLLSTAT:
165 break;
166
167 case MII_MEDIACHG:
168 /*
169 * If the interface is not up, don't do anything.
170 */
171 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
172 break;
173
174 mii_phy_setmedia(sc);
175 break;
176
177 case MII_TICK:
178 /*
179 * Only used for autonegotiation.
180 */
181 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
182 break;
183
184 if (mii_phy_tick(sc) == EJUSTRETURN)
185 return (0);
186 break;
187
188 case MII_DOWN:
189 mii_phy_down(sc);
190 return (0);
191 }
192
193 /* Update the media status. */
194 mii_phy_status(sc);
195
196 /* Callback if something changed. */
197 mii_phy_update(sc, cmd);
198 return (0);
199}
200
201static void
202exphy_reset(struct mii_softc *sc)
203{
204
205 mii_phy_reset(sc);
206
207 /*
208 * XXX 3Com PHY doesn't set the BMCR properly after
209 * XXX reset, which breaks autonegotiation.
210 */
211 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
212}
213