inphy.c revision 1.6 1 /* $NetBSD: inphy.c,v 1.6 1998/11/04 23:07:15 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_ticks;
93 int sc_active;
94 };
95
96 int inphymatch __P((struct device *, struct cfdata *, void *));
97 void inphyattach __P((struct device *, struct device *, void *));
98
99 struct cfattach inphy_ca = {
100 sizeof(struct inphy_softc), inphymatch, inphyattach
101 };
102
103 int inphy_service __P((struct mii_softc *, struct mii_data *, int));
104 void inphy_reset __P((struct inphy_softc *));
105 void inphy_status __P((struct inphy_softc *));
106
107 int
108 inphymatch(parent, match, aux)
109 struct device *parent;
110 struct cfdata *match;
111 void *aux;
112 {
113 struct mii_attach_args *ma = aux;
114
115 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL &&
116 MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555)
117 return (1);
118
119 return (0);
120 }
121
122 void
123 inphyattach(parent, self, aux)
124 struct device *parent, *self;
125 void *aux;
126 {
127 struct inphy_softc *sc = (struct inphy_softc *)self;
128 struct mii_attach_args *ma = aux;
129 struct mii_data *mii = ma->mii_data;
130
131 printf(": %s, rev. %d\n", MII_STR_INTEL_I82555,
132 MII_REV(ma->mii_id2));
133
134 sc->sc_mii.mii_inst = mii->mii_instance;
135 sc->sc_mii.mii_phy = ma->mii_phyno;
136 sc->sc_mii.mii_service = inphy_service;
137 sc->sc_mii.mii_pdata = mii;
138
139 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
140
141 #if 0
142 /* Can't do this on the i82557! */
143 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
144 BMCR_ISO);
145 #endif
146 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
147 BMCR_LOOP|BMCR_S100);
148
149 inphy_reset(sc);
150
151 sc->sc_mii.mii_capabilities =
152 PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask;
153 printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
154 if ((sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) == 0)
155 printf("no media present");
156 else
157 mii_add_media(mii, sc->sc_mii.mii_capabilities,
158 sc->sc_mii.mii_inst);
159 printf("\n");
160 #undef ADD
161 }
162
163 int
164 inphy_service(self, mii, cmd)
165 struct mii_softc *self;
166 struct mii_data *mii;
167 int cmd;
168 {
169 struct inphy_softc *sc = (struct inphy_softc *)self;
170 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
171 int reg;
172
173 switch (cmd) {
174 case MII_POLLSTAT:
175 /*
176 * If we're not polling our PHY instance, just return.
177 */
178 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
179 return (0);
180 break;
181
182 case MII_MEDIACHG:
183 /*
184 * If the media indicates a different PHY instance,
185 * isolate ourselves.
186 */
187 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) {
188 reg = PHY_READ(&sc->sc_mii, MII_BMCR);
189 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO);
190 return (0);
191 }
192
193 /*
194 * If the interface is not up, don't do anything.
195 */
196 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
197 break;
198
199 switch (IFM_SUBTYPE(ife->ifm_media)) {
200 case IFM_AUTO:
201 /*
202 * If we're already in auto mode, just return.
203 */
204 if (PHY_READ(&sc->sc_mii, MII_BMCR) & BMCR_AUTOEN)
205 return (0);
206 (void) mii_phy_auto(&sc->sc_mii);
207 break;
208 case IFM_100_T4:
209 /*
210 * XXX Not supported as a manual setting right now.
211 */
212 return (EINVAL);
213 default:
214 /*
215 * BMCR data is stored in the ifmedia entry.
216 */
217 PHY_WRITE(&sc->sc_mii, MII_ANAR,
218 mii_anar(ife->ifm_media));
219 PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data);
220 }
221 break;
222
223 case MII_TICK:
224 /*
225 * If we're not currently selected, just return.
226 */
227 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
228 return (0);
229
230 /*
231 * Only used for autonegotiation.
232 */
233 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
234 return (0);
235
236 /*
237 * Is the interface even up?
238 */
239 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
240 return (0);
241
242 /*
243 * Check to see if we have link. If we do, we don't
244 * need to restart the autonegotiation process. Read
245 * the BMSR twice in case it's latched.
246 */
247 reg = PHY_READ(&sc->sc_mii, MII_BMSR) |
248 PHY_READ(&sc->sc_mii, MII_BMSR);
249 if (reg & BMSR_LINK)
250 return (0);
251
252 /*
253 * Only retry autonegotiation every 5 seconds.
254 */
255 if (++sc->sc_ticks != 5)
256 return (0);
257
258 sc->sc_ticks = 0;
259 inphy_reset(sc);
260 (void) mii_phy_auto(&sc->sc_mii);
261 break;
262 }
263
264 /* Update the media status. */
265 inphy_status(sc);
266
267 /* Callback if something changed. */
268 if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
269 (*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
270 sc->sc_active = mii->mii_media_active;
271 }
272 return (0);
273 }
274
275 void
276 inphy_status(sc)
277 struct inphy_softc *sc;
278 {
279 struct mii_data *mii = sc->sc_mii.mii_pdata;
280 int bmsr, bmcr, scr;
281
282 mii->mii_media_status = IFM_AVALID;
283 mii->mii_media_active = IFM_ETHER;
284
285 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) |
286 PHY_READ(&sc->sc_mii, MII_BMSR);
287 if (bmsr & BMSR_LINK)
288 mii->mii_media_status |= IFM_ACTIVE;
289
290 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR);
291 if (bmcr & BMCR_ISO) {
292 mii->mii_media_active |= IFM_NONE;
293 mii->mii_media_status = 0;
294 return;
295 }
296
297 if (bmcr & BMCR_LOOP)
298 mii->mii_media_active |= IFM_LOOP;
299
300 if (bmcr & BMCR_AUTOEN) {
301 if ((bmsr & BMSR_ACOMP) == 0) {
302 /* Erg, still trying, I guess... */
303 mii->mii_media_active |= IFM_NONE;
304 return;
305 }
306 scr = PHY_READ(&sc->sc_mii, MII_INPHY_SCR);
307 if (scr & SCR_T4)
308 mii->mii_media_active |= IFM_100_T4;
309 else if (scr & SCR_S100)
310 mii->mii_media_active |= IFM_100_TX;
311 else
312 mii->mii_media_active |= IFM_10_T;
313 if (scr & SCR_FDX)
314 mii->mii_media_active |= IFM_FDX;
315 } else {
316 if (bmcr & BMCR_S100)
317 mii->mii_media_active |= IFM_100_TX;
318 else
319 mii->mii_media_active |= IFM_10_T;
320 if (bmcr & BMCR_FDX)
321 mii->mii_media_active |= IFM_FDX;
322 }
323 }
324
325 void
326 inphy_reset(sc)
327 struct inphy_softc *sc;
328 {
329 int reg, i;
330
331 /*
332 * The i82557 wedges if we isolate all of its PHYs!
333 */
334 if (sc->sc_mii.mii_inst == 0)
335 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET);
336 else
337 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET|BMCR_ISO);
338
339 /* Wait 100ms for it to complete. */
340 for (i = 0; i < 100; i++) {
341 reg = PHY_READ(&sc->sc_mii, MII_BMCR);
342 if ((reg & BMCR_RESET) == 0)
343 break;
344 delay(1000);
345 }
346
347 /* Make sure the PHY is isolated. */
348 if (sc->sc_mii.mii_inst != 0)
349 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO);
350 }
351