inphy.c revision 1.1 1 /* $NetBSD: inphy.c,v 1.1 1998/08/11 00:00:28 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998 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 * 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 Intel's i82555 ethernet 10/100 PHY
71 * Data Sheet available from www.intel.com
72 */
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/kernel.h>
77 #include <sys/device.h>
78 #include <sys/malloc.h>
79 #include <sys/socket.h>
80
81 #include <net/if.h>
82 #include <net/if_media.h>
83
84 #include <dev/mii/mii.h>
85 #include <dev/mii/miivar.h>
86 #include <dev/mii/miidevs.h>
87
88 #include <dev/mii/inphyreg.h>
89
90 struct inphy_softc {
91 struct mii_softc sc_mii; /* generic PHY */
92 int sc_capabilities;
93 int sc_ticks;
94 int sc_active;
95 };
96
97 int inphymatch __P((struct device *, struct cfdata *, void *));
98 void inphyattach __P((struct device *, struct device *, void *));
99
100 struct cfattach inphy_ca = {
101 sizeof(struct inphy_softc), inphymatch, inphyattach
102 };
103
104 #define INPHY_READ(sc, reg) \
105 (*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \
106 (sc)->sc_mii.mii_phy, (reg))
107
108 #define INPHY_WRITE(sc, reg, val) \
109 (*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \
110 (sc)->sc_mii.mii_phy, (reg), (val))
111
112 int inphy_service __P((struct mii_softc *, struct mii_data *, int));
113 void inphy_reset __P((struct inphy_softc *));
114 void inphy_auto __P((struct inphy_softc *));
115 void inphy_status __P((struct inphy_softc *));
116
117 int
118 inphymatch(parent, match, aux)
119 struct device *parent;
120 struct cfdata *match;
121 void *aux;
122 {
123 struct mii_attach_args *ma = aux;
124
125 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL &&
126 MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555)
127 return (1);
128
129 return (0);
130 }
131
132 void
133 inphyattach(parent, self, aux)
134 struct device *parent, *self;
135 void *aux;
136 {
137 struct inphy_softc *sc = (struct inphy_softc *)self;
138 struct mii_attach_args *ma = aux;
139 struct mii_data *mii = ma->mii_data;
140
141 printf(": %s, rev. %d\n", MII_STR_INTEL_I82555,
142 MII_REV(ma->mii_id2));
143
144 sc->sc_mii.mii_inst = mii->mii_instance;
145 sc->sc_mii.mii_phy = ma->mii_phyno;
146 sc->sc_mii.mii_service = inphy_service;
147 sc->sc_mii.mii_pdata = mii;
148
149 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
150
151 #if 0
152 /* Can't do this on the i82557! */
153 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
154 BMCR_ISO);
155 #endif
156 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
157 BMCR_LOOP|BMCR_S100);
158
159 inphy_reset(sc);
160
161 sc->sc_capabilities = INPHY_READ(sc, MII_BMSR) & ma->mii_capmask;
162 printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
163 if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0)
164 printf("no media present");
165 else
166 mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst);
167 printf("\n");
168 #undef ADD
169 }
170
171 int
172 inphy_service(self, mii, cmd)
173 struct mii_softc *self;
174 struct mii_data *mii;
175 int cmd;
176 {
177 struct inphy_softc *sc = (struct inphy_softc *)self;
178 int reg;
179
180 switch (cmd) {
181 case MII_POLLSTAT:
182 /*
183 * If we're not polling our PHY instance, just return.
184 */
185 if (IFM_INST(mii->mii_media.ifm_media) !=
186 sc->sc_mii.mii_inst)
187 return (0);
188 break;
189
190 case MII_MEDIACHG:
191 /*
192 * If the media indicates a different PHY instance,
193 * isolate ourselves.
194 */
195 if (IFM_INST(mii->mii_media.ifm_media) !=
196 sc->sc_mii.mii_inst) {
197 reg = INPHY_READ(sc, MII_BMCR);
198 INPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
199 return (0);
200 }
201
202 /*
203 * If the interface is not up, don't do anything.
204 */
205 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
206 break;
207
208 switch (IFM_SUBTYPE(mii->mii_media.ifm_media)) {
209 case IFM_AUTO:
210 /*
211 * If we're already in auto mode, just return.
212 */
213 if (INPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
214 return (0);
215 inphy_auto(sc);
216 break;
217 case IFM_100_T4:
218 /*
219 * XXX Not supported as a manual setting right now.
220 */
221 return (EINVAL);
222 default:
223 /*
224 * BMCR data is stored in the ifmedia entry.
225 */
226 INPHY_WRITE(sc, MII_ANAR,
227 mii_anar(mii->mii_media.ifm_media));
228 INPHY_WRITE(sc, MII_BMCR,
229 mii->mii_media.ifm_cur->ifm_data);
230 }
231 break;
232
233 case MII_TICK:
234 /*
235 * If we're not currently selected, just return.
236 */
237 if (IFM_INST(mii->mii_media.ifm_media) !=
238 sc->sc_mii.mii_inst)
239 return (0);
240
241 /*
242 * Only used for autonegotiation.
243 */
244 if (IFM_SUBTYPE(mii->mii_media.ifm_media) != IFM_AUTO)
245 return (0);
246
247 /*
248 * Is the interface even up?
249 */
250 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
251 return (0);
252
253 /*
254 * Check to see if we have link. If we do, we don't
255 * need to restart the autonegotiation process. Read
256 * the BMSR twice in case it's latched.
257 */
258 reg = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR);
259 if (reg & BMSR_LINK)
260 return (0);
261
262 /*
263 * Only retry autonegotiation every 5 seconds.
264 */
265 if (++sc->sc_ticks != 5)
266 return (0);
267
268 sc->sc_ticks = 0;
269 inphy_reset(sc);
270 inphy_auto(sc);
271 break;
272 }
273
274 /* Update the media status. */
275 inphy_status(sc);
276
277 /* Callback if something changed. */
278 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
279 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
280 sc->sc_active = mii->mii_media_active;
281 }
282 return (0);
283 }
284
285 void
286 inphy_status(sc)
287 struct inphy_softc *sc;
288 {
289 struct mii_data *mii = sc->sc_mii.mii_pdata;
290 int bmsr, bmcr, scr;
291
292 mii->mii_media_status = IFM_AVALID;
293 mii->mii_media_active = IFM_ETHER;
294
295 bmsr = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR);
296 if (bmsr & BMSR_LINK)
297 mii->mii_media_status |= IFM_ACTIVE;
298
299 bmcr = INPHY_READ(sc, MII_BMCR);
300 if (bmcr & BMCR_ISO) {
301 mii->mii_media_active |= IFM_NONE;
302 mii->mii_media_status = 0;
303 return;
304 }
305
306 if (bmcr & BMCR_LOOP)
307 mii->mii_media_active |= IFM_LOOP;
308
309 if (bmcr & BMCR_AUTOEN) {
310 scr = INPHY_READ(sc, MII_INPHY_SCR);
311 if (scr & SCR_T4)
312 mii->mii_media_active |= IFM_100_T4;
313 else if (scr & SCR_S100)
314 mii->mii_media_active |= IFM_100_TX;
315 else
316 mii->mii_media_active |= IFM_10_T;
317 if (scr & SCR_FDX)
318 mii->mii_media_active |= IFM_FDX;
319 } else {
320 if (bmcr & BMCR_S100)
321 mii->mii_media_active |= IFM_100_TX;
322 else
323 mii->mii_media_active |= IFM_10_T;
324 if (bmcr & BMCR_FDX)
325 mii->mii_media_active |= IFM_FDX;
326 }
327 }
328
329 void
330 inphy_auto(sc)
331 struct inphy_softc *sc;
332 {
333 int bmsr, i;
334
335 INPHY_WRITE(sc, MII_ANAR,
336 BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA);
337 INPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
338
339 /* Wait 500ms for it to complete. */
340 for (i = 0; i < 500; i++) {
341 if ((bmsr = INPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP)
342 return;
343 delay(1000);
344 }
345 if ((bmsr & BMSR_ACOMP) == 0)
346 printf("%s: autonegotiation failed to complete\n",
347 sc->sc_mii.mii_dev.dv_xname);
348 }
349
350 void
351 inphy_reset(sc)
352 struct inphy_softc *sc;
353 {
354 int reg, i;
355
356 /*
357 * The i82557 wedges if we isolate all of its PHYs!
358 */
359 if (sc->sc_mii.mii_inst == 0)
360 INPHY_WRITE(sc, MII_BMCR, BMCR_RESET);
361 else
362 INPHY_WRITE(sc, MII_BMCR, BMCR_RESET|BMCR_ISO);
363
364 /* Wait 100ms for it to complete. */
365 for (i = 0; i < 100; i++) {
366 reg = INPHY_READ(sc, MII_BMCR);
367 if ((reg & BMCR_RESET) == 0)
368 break;
369 delay(1000);
370 }
371
372 /* Make sure the PHY is isolated. */
373 if (sc->sc_mii.mii_inst != 0)
374 INPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
375 }
376