FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphyter.c
1 /* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 msaitoh Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999, 2000, 2001 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.
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 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD: releng/8.2/sys/dev/mii/nsphyter.c 215882 2010-11-26 20:45:49Z marius $");
59
60 /*
61 * driver for National Semiconductor's DP83843 `PHYTER' ethernet 10/100 PHY
62 * Data Sheet available from www.national.com
63 *
64 * We also support the DP83815 `MacPHYTER' internal PHY since, for our
65 * purposes, they are compatible.
66 */
67
68 #include <sys/param.h>
69 #include <sys/systm.h>
70 #include <sys/bus.h>
71 #include <sys/errno.h>
72 #include <sys/kernel.h>
73 #include <sys/module.h>
74 #include <sys/socket.h>
75
76 #include <net/if.h>
77 #include <net/if_media.h>
78
79 #include <dev/mii/mii.h>
80 #include <dev/mii/miivar.h>
81 #include "miidevs.h"
82
83 #include <dev/mii/nsphyterreg.h>
84
85 #include "miibus_if.h"
86
87 static device_probe_t nsphyter_probe;
88 static device_attach_t nsphyter_attach;
89
90 static device_method_t nsphyter_methods[] = {
91 /* device interface */
92 DEVMETHOD(device_probe, nsphyter_probe),
93 DEVMETHOD(device_attach, nsphyter_attach),
94 DEVMETHOD(device_detach, mii_phy_detach),
95 DEVMETHOD(device_shutdown, bus_generic_shutdown),
96 { 0, 0 }
97 };
98
99 static devclass_t nsphyter_devclass;
100
101 static driver_t nsphyter_driver = {
102 "nsphyter",
103 nsphyter_methods,
104 sizeof(struct mii_softc)
105 };
106
107 DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0);
108
109 static int nsphyter_service(struct mii_softc *, struct mii_data *, int);
110 static void nsphyter_status(struct mii_softc *);
111 static void nsphyter_reset(struct mii_softc *);
112
113 static const struct mii_phydesc nsphys[] = {
114 MII_PHY_DESC(NATSEMI, DP83815),
115 MII_PHY_DESC(NATSEMI, DP83843),
116 MII_PHY_DESC(NATSEMI, DP83847),
117 MII_PHY_END
118 };
119
120 static int
121 nsphyter_probe(device_t dev)
122 {
123
124 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT));
125 }
126
127 static int
128 nsphyter_attach(device_t dev)
129 {
130 struct mii_softc *sc;
131 struct mii_attach_args *ma;
132 struct mii_data *mii;
133
134 sc = device_get_softc(dev);
135 ma = device_get_ivars(dev);
136 sc->mii_dev = device_get_parent(dev);
137 mii = ma->mii_data;
138 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
139
140 sc->mii_flags = miibus_get_flags(dev);
141 sc->mii_inst = mii->mii_instance++;
142 sc->mii_phy = ma->mii_phyno;
143 sc->mii_service = nsphyter_service;
144 sc->mii_pdata = mii;
145
146 sc->mii_flags |= MIIF_NOMANPAUSE;
147
148 #if 1
149
150 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
151
152 /*
153 * XXX IFM_LOOP should be handled by mii_phy_add_media() based
154 * on MIIF_NOLOOP.
155 */
156 if ((sc->mii_flags & MIIF_NOLOOP) == 0)
157 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
158 sc->mii_inst), MII_MEDIA_100_TX);
159
160 #endif
161
162 nsphyter_reset(sc);
163
164 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
165 device_printf(dev, " ");
166 mii_phy_add_media(sc);
167 printf("\n");
168
169 MIIBUS_MEDIAINIT(sc->mii_dev);
170 return (0);
171 }
172
173 static int
174 nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
175 {
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 if (mii_phy_tick(sc) == EJUSTRETURN)
193 return (0);
194 break;
195 }
196
197 /* Update the media status. */
198 nsphyter_status(sc);
199
200 /* Callback if something changed. */
201 mii_phy_update(sc, cmd);
202 return (0);
203 }
204
205 static void
206 nsphyter_status(struct mii_softc *sc)
207 {
208 struct mii_data *mii = sc->mii_pdata;
209 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
210 int bmsr, bmcr, physts;
211
212 mii->mii_media_status = IFM_AVALID;
213 mii->mii_media_active = IFM_ETHER;
214
215 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
216 physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS);
217
218 if ((physts & PHYSTS_LINK) != 0)
219 mii->mii_media_status |= IFM_ACTIVE;
220
221 bmcr = PHY_READ(sc, MII_BMCR);
222 if ((bmcr & BMCR_ISO) != 0) {
223 mii->mii_media_active |= IFM_NONE;
224 mii->mii_media_status = 0;
225 return;
226 }
227
228 if ((bmcr & BMCR_LOOP) != 0)
229 mii->mii_media_active |= IFM_LOOP;
230
231 if ((bmcr & BMCR_AUTOEN) != 0) {
232 /*
233 * The media status bits are only valid if autonegotiation
234 * has completed (or it's disabled).
235 */
236 if ((bmsr & BMSR_ACOMP) == 0) {
237 /* Erg, still trying, I guess... */
238 mii->mii_media_active |= IFM_NONE;
239 return;
240 }
241
242 if ((physts & PHYSTS_SPEED10) != 0)
243 mii->mii_media_active |= IFM_10_T;
244 else
245 mii->mii_media_active |= IFM_100_TX;
246 if ((physts & PHYSTS_DUPLEX) != 0)
247 mii->mii_media_active |=
248 IFM_FDX | mii_phy_flowstatus(sc);
249 else
250 mii->mii_media_active |= IFM_HDX;
251 } else
252 mii->mii_media_active = ife->ifm_media;
253 }
254
255 static void
256 nsphyter_reset(struct mii_softc *sc)
257 {
258 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
259 int reg, i;
260
261 if ((sc->mii_flags & MIIF_NOISOLATE) != 0)
262 reg = BMCR_RESET;
263 else
264 reg = BMCR_RESET | BMCR_ISO;
265 PHY_WRITE(sc, MII_BMCR, reg);
266
267 /*
268 * It is best to allow a little time for the reset to settle
269 * in before we start polling the BMCR again. Notably, the
270 * DP8384{3,7} manuals state that there should be a 500us delay
271 * between asserting software reset and attempting MII serial
272 * operations. Be conservative. Also, a DP83815 can get into
273 * a bad state on cable removal and reinsertion if we do not
274 * delay here.
275 */
276 DELAY(1000);
277
278 /*
279 * Wait another 2s for it to complete.
280 * This is only a little overkill as under normal circumstances
281 * the PHY can take up to 1s to complete reset.
282 * This is also a bit odd because after a reset, the BMCR will
283 * clear the reset bit and simply reports 0 even though the reset
284 * is not yet complete.
285 */
286 for (i = 0; i < 1000; i++) {
287 reg = PHY_READ(sc, MII_BMCR);
288 if (reg != 0 && (reg & BMCR_RESET) == 0)
289 break;
290 DELAY(2000);
291 }
292
293 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) {
294 if ((ife == NULL && sc->mii_inst != 0) ||
295 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))
296 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
297 }
298 }
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