FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/exphy.c
1 /* $NetBSD: exphy.c,v 1.35 2003/04/29 01:49:33 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 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 /*
41 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by Manuel Bouyer.
54 * 4. The name of the author may not be used to endorse or promote products
55 * derived from this software without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
67 */
68
69 /*
70 * driver for 3Com internal PHYs
71 */
72
73 #include <sys/cdefs.h>
74 __KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.35 2003/04/29 01:49:33 thorpej Exp $");
75
76 #include <sys/param.h>
77 #include <sys/systm.h>
78 #include <sys/kernel.h>
79 #include <sys/device.h>
80 #include <sys/socket.h>
81
82 #include <net/if.h>
83 #include <net/if_media.h>
84
85 #include <dev/mii/mii.h>
86 #include <dev/mii/miivar.h>
87 #include <dev/mii/miidevs.h>
88
89 int exphymatch(struct device *, struct cfdata *, void *);
90 void exphyattach(struct device *, struct device *, void *);
91
92 CFATTACH_DECL(exphy, sizeof(struct mii_softc),
93 exphymatch, exphyattach, mii_phy_detach, mii_phy_activate);
94
95 int exphy_service(struct mii_softc *, struct mii_data *, int);
96 void exphy_reset(struct mii_softc *);
97
98 const struct mii_phy_funcs exphy_funcs = {
99 exphy_service, ukphy_status, exphy_reset,
100 };
101
102 int
103 exphymatch(struct device *parent, struct cfdata *match, void *aux)
104 {
105 struct mii_attach_args *ma = aux;
106
107 /*
108 * Argh, 3Com PHY reports oui == 0 model == 0!
109 */
110 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 &&
111 MII_MODEL(ma->mii_id2) != 0)
112 return (0);
113
114 /*
115 * Make sure the parent is an `ex'.
116 */
117 if (strcmp(parent->dv_cfdata->cf_name, "ex") != 0)
118 return (0);
119
120 return (10);
121 }
122
123 void
124 exphyattach(struct device *parent, struct device *self, void *aux)
125 {
126 struct mii_softc *sc = (struct mii_softc *)self;
127 struct mii_attach_args *ma = aux;
128 struct mii_data *mii = ma->mii_data;
129
130 aprint_naive(": Media interface\n");
131 aprint_normal(": 3Com internal media interface\n");
132
133 sc->mii_inst = mii->mii_instance;
134 sc->mii_phy = ma->mii_phyno;
135 sc->mii_funcs = &exphy_funcs;
136 sc->mii_pdata = mii;
137 sc->mii_flags = ma->mii_flags;
138 sc->mii_anegticks = 5;
139
140 /*
141 * The 3Com PHY can never be isolated, so never allow non-zero
142 * instances!
143 */
144 if (mii->mii_instance != 0) {
145 aprint_error("%s: ignoring this PHY, non-zero instance\n",
146 sc->mii_dev.dv_xname);
147 return;
148 }
149 sc->mii_flags |= MIIF_NOISOLATE;
150
151 PHY_RESET(sc);
152
153 sc->mii_capabilities =
154 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
155 aprint_normal("%s: ", sc->mii_dev.dv_xname);
156 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
157 aprint_error("no media present");
158 else
159 mii_phy_add_media(sc);
160 aprint_normal("\n");
161 }
162
163 int
164 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
165 {
166 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
167
168 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
169 return (ENXIO);
170
171 /*
172 * We can't isolate the 3Com PHY, so it has to be the only one!
173 */
174 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
175 panic("exphy_service: can't isolate 3Com PHY");
176
177 switch (cmd) {
178 case MII_POLLSTAT:
179 break;
180
181 case MII_MEDIACHG:
182 /*
183 * If the interface is not up, don't do anything.
184 */
185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
186 break;
187
188 mii_phy_setmedia(sc);
189 break;
190
191 case MII_TICK:
192 /*
193 * Only used for autonegotiation.
194 */
195 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
196 return (0);
197
198 if (mii_phy_tick(sc) == EJUSTRETURN)
199 return (0);
200 break;
201
202 case MII_DOWN:
203 mii_phy_down(sc);
204 return (0);
205 }
206
207 /* Update the media status. */
208 mii_phy_status(sc);
209
210 /* Callback if something changed. */
211 mii_phy_update(sc, cmd);
212 return (0);
213 }
214
215 void
216 exphy_reset(struct mii_softc *sc)
217 {
218
219 mii_phy_reset(sc);
220
221 /*
222 * XXX 3Com PHY doesn't set the BMCR properly after
223 * XXX reset, which breaks autonegotiation.
224 */
225 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
226 }
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