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 * 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 * $FreeBSD: src/sys/dev/mii/exphy.c,v 1.4.2.2 2002/11/08 21:53:49 semenu Exp $
40 */
41
42 /*
43 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by Manuel Bouyer.
56 * 4. The name of the author may not be used to endorse or promote products
57 * derived from this software without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
63 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
64 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
65 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
68 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 */
70
71 /*
72 * driver for 3Com internal PHYs
73 */
74
75 #include <sys/param.h>
76 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/socket.h>
79 #include <sys/module.h>
80 #include <sys/bus.h>
81
82 #include <net/if.h>
83 #include <net/if_var.h>
84 #include <net/if_media.h>
85
86 #include "mii.h"
87 #include "miivar.h"
88 #include "miidevs.h"
89
90 #include "miibus_if.h"
91
92 static int exphy_probe (device_t);
93 static int exphy_attach (device_t);
94
95 static device_method_t exphy_methods[] = {
96 /* device interface */
97 DEVMETHOD(device_probe, exphy_probe),
98 DEVMETHOD(device_attach, exphy_attach),
99 DEVMETHOD(device_detach, ukphy_detach),
100 DEVMETHOD(device_shutdown, bus_generic_shutdown),
101 DEVMETHOD_END
102 };
103
104 static devclass_t exphy_devclass;
105
106 static driver_t exphy_driver = {
107 "xlphy",
108 exphy_methods,
109 sizeof(struct mii_softc)
110 };
111
112 DRIVER_MODULE(xlphy, miibus, exphy_driver, exphy_devclass, NULL, NULL);
113
114 int exphy_service (struct mii_softc *, struct mii_data *, int);
115 void exphy_reset (struct mii_softc *);
116
117 static int
exphy_probe(device_t dev)118 exphy_probe(device_t dev)
119 {
120 struct mii_attach_args *ma;
121 device_t parent;
122
123 ma = device_get_ivars(dev);
124 parent = device_get_parent(device_get_parent(dev));
125
126 /*
127 * Argh, 3Com PHY reports oui == 0 model == 0!
128 */
129 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
130 MII_MODEL(ma->mii_id2) != 0) &&
131 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_BROADCOM ||
132 MII_MODEL(ma->mii_id2) != MII_MODEL_BROADCOM_3C905C))
133 return (ENXIO);
134
135 /*
136 * Make sure the parent is an `xl'.
137 */
138 if (strcmp(device_get_name(parent), "xl") != 0)
139 return (ENXIO);
140
141 if (MII_OUI(ma->mii_id1, ma->mii_id2) == 0)
142 device_set_desc(dev, "3Com internal media interface");
143 else
144 device_set_desc(dev, MII_STR_BROADCOM_3C905C);
145
146 return (0);
147 }
148
149 static int
exphy_attach(device_t dev)150 exphy_attach(device_t dev)
151 {
152 struct mii_softc *sc;
153 struct mii_attach_args *ma;
154 struct mii_data *mii;
155
156 sc = device_get_softc(dev);
157 ma = device_get_ivars(dev);
158 mii_softc_init(sc, ma);
159 sc->mii_dev = device_get_parent(dev);
160 mii = device_get_softc(sc->mii_dev);
161
162 /*
163 * The 3Com PHY can never be isolated, so never allow non-zero
164 * instances!
165 */
166 if (mii->mii_instance != 0) {
167 device_printf(dev, "ignoring this PHY, non-zero instance\n");
168 return(ENXIO);
169 }
170
171 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
172
173 sc->mii_inst = mii->mii_instance;
174 sc->mii_service = exphy_service;
175 sc->mii_reset = exphy_reset;
176 sc->mii_pdata = mii;
177 mii->mii_instance++;
178
179 sc->mii_flags |= MIIF_NOISOLATE;
180
181 exphy_reset(sc);
182
183 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
184 device_printf(dev, " ");
185 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
186 kprintf("no media present");
187 else
188 mii_phy_add_media(sc);
189 kprintf("\n");
190
191 MIIBUS_MEDIAINIT(sc->mii_dev);
192 return(0);
193 }
194
195 int
exphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)196 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
197 {
198 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
199
200 /*
201 * We can't isolate the 3Com PHY, so it has to be the only one!
202 */
203 KASSERT(IFM_INST(ife->ifm_media) == sc->mii_inst,
204 ("exphy_service: can't isolate 3Com PHY"));
205
206 switch (cmd) {
207 case MII_POLLSTAT:
208 break;
209
210 case MII_MEDIACHG:
211 /*
212 * If the interface is not up, don't do anything.
213 */
214 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
215 break;
216
217 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_T4) {
218 /*
219 * XXX Not supported as a manual setting right now.
220 */
221 return (EINVAL);
222 }
223
224 mii_phy_set_media(sc);
225 break;
226
227 case MII_TICK:
228 /*
229 * Is the interface even up?
230 */
231 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
232 return (0);
233
234 /*
235 * Only used for autonegotiation.
236 */
237 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
238 break;
239
240 /*
241 * The 3Com PHY's autonegotiation doesn't need to be
242 * kicked; it continues in the background.
243 */
244 break;
245 }
246
247 /* Update the media status. */
248 ukphy_status(sc);
249
250 /* Callback if something changed. */
251 mii_phy_update(sc, cmd);
252 return (0);
253 }
254
255 void
exphy_reset(struct mii_softc * sc)256 exphy_reset(struct mii_softc *sc)
257 {
258
259 mii_phy_reset(sc);
260
261 /*
262 * XXX 3Com PHY doesn't set the BMCR properly after
263 * XXX reset, which breaks autonegotiation.
264 */
265 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
266 }
267