1 /* $NetBSD: exphy.c,v 1.58 2020/03/15 23:04:50 thorpej 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 1.58 2020/03/15 23:04:50 thorpej 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
77 static int exphymatch(device_t, cfdata_t, void *);
78 static void exphyattach(device_t, device_t, void *);
79
80 CFATTACH_DECL_NEW(exphy, sizeof(struct mii_softc),
81 exphymatch, exphyattach, mii_phy_detach, mii_phy_activate);
82
83 static int exphy_service(struct mii_softc *, struct mii_data *, int);
84 static void exphy_reset(struct mii_softc *);
85
86 static const struct mii_phy_funcs exphy_funcs = {
87 exphy_service, ukphy_status, exphy_reset,
88 };
89
90 static int
exphymatch(device_t parent,cfdata_t match,void * aux)91 exphymatch(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
111 static void
exphyattach(device_t parent,device_t self,void * aux)112 exphyattach(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
128 /*
129 * The 3Com PHY can never be isolated, so never allow non-zero
130 * instances!
131 */
132 if (mii->mii_instance != 0) {
133 aprint_error_dev(self,
134 "ignoring this PHY, non-zero instance\n");
135 return;
136 }
137 sc->mii_flags |= MIIF_NOISOLATE;
138
139 mii_lock(mii);
140
141 PHY_RESET(sc);
142
143 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
144 sc->mii_capabilities &= ma->mii_capmask;
145
146 mii_unlock(mii);
147
148 mii_phy_add_media(sc);
149 }
150
151 static int
exphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)152 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
153 {
154 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
155
156 /* We can't isolate the 3Com PHY, so it has to be the only one! */
157 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
158 panic("exphy_service: can't isolate 3Com PHY");
159
160 KASSERT(mii_locked(mii));
161
162 switch (cmd) {
163 case MII_POLLSTAT:
164 break;
165
166 case MII_MEDIACHG:
167 /* If the interface is not up, don't do anything. */
168 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
169 break;
170
171 mii_phy_setmedia(sc);
172 break;
173
174 case MII_TICK:
175 /* Only used for autonegotiation. */
176 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
177 break;
178
179 if (mii_phy_tick(sc) == EJUSTRETURN)
180 return 0;
181 break;
182
183 case MII_DOWN:
184 mii_phy_down(sc);
185 return 0;
186 }
187
188 /* Update the media status. */
189 mii_phy_status(sc);
190
191 /* Callback if something changed. */
192 mii_phy_update(sc, cmd);
193 return 0;
194 }
195
196 static void
exphy_reset(struct mii_softc * sc)197 exphy_reset(struct mii_softc *sc)
198 {
199
200 KASSERT(mii_locked(sc->mii_pdata));
201
202 mii_phy_reset(sc);
203
204 /*
205 * XXX 3Com PHY doesn't set the BMCR properly after
206 * XXX reset, which breaks autonegotiation.
207 */
208 PHY_WRITE(sc, MII_BMCR, BMCR_S100 | BMCR_AUTOEN | BMCR_FDX);
209 }
210