1 /* $OpenBSD: xmphy.c,v 1.14 2005/06/19 19:30:14 brad Exp $ */
2
3 /*
4 * Copyright (c) 2000
5 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * $FreeBSD: src/sys/dev/mii/xmphy.c,v 1.1 2000/04/22 01:58:18 wpaul Exp $
35 */
36
37 /*
38 * driver for the XaQti XMAC II's internal PHY. This is sort of
39 * like a 10/100 PHY, except the only thing we're really autoselecting
40 * here is full/half duplex. Speed is always 1000mbps.
41 */
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/device.h>
47 #include <sys/socket.h>
48 #include <sys/errno.h>
49
50 #include <net/if.h>
51 #include <net/if_media.h>
52
53 #include <dev/mii/mii.h>
54 #include <dev/mii/miivar.h>
55 #include <dev/mii/miidevs.h>
56
57 #include <dev/mii/xmphyreg.h>
58
59 int xmphy_probe(struct device *, void *, void *);
60 void xmphy_attach(struct device *, struct device *, void *);
61
62 struct cfattach xmphy_ca = {
63 sizeof(struct mii_softc), xmphy_probe, xmphy_attach, mii_phy_detach,
64 mii_phy_activate
65 };
66
67 struct cfdriver xmphy_cd = {
68 NULL, "xmphy", DV_DULL
69 };
70
71 int xmphy_service(struct mii_softc *, struct mii_data *, int);
72 void xmphy_status(struct mii_softc *);
73
74 int xmphy_mii_phy_auto(struct mii_softc *, int);
75
76 const struct mii_phy_funcs xmphy_funcs = {
77 xmphy_service, xmphy_status, mii_phy_reset,
78 };
79
80 static const struct mii_phydesc xmphys[] = {
81 { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII,
82 MII_STR_XAQTI_XMACII },
83
84 { MII_OUI_JATO, MII_MODEL_JATO_BASEX,
85 MII_STR_JATO_BASEX },
86
87 { 0, 0,
88 NULL },
89 };
90
xmphy_probe(struct device * parent,void * match,void * aux)91 int xmphy_probe(struct device *parent, void *match, void *aux)
92 {
93 struct mii_attach_args *ma = aux;
94
95 if (mii_phy_match(ma, xmphys) != NULL)
96 return (10);
97
98 return (0);
99 }
100
101 void
xmphy_attach(struct device * parent,struct device * self,void * aux)102 xmphy_attach(struct device *parent, struct device *self, void *aux)
103 {
104 struct mii_softc *sc = (struct mii_softc *)self;
105 struct mii_attach_args *ma = aux;
106 struct mii_data *mii = ma->mii_data;
107 const struct mii_phydesc *mpd;
108
109 mpd = mii_phy_match(ma, xmphys);
110 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
111
112 sc->mii_inst = mii->mii_instance;
113 sc->mii_phy = ma->mii_phyno;
114 sc->mii_funcs = &xmphy_funcs;
115 sc->mii_pdata = mii;
116 sc->mii_flags = ma->mii_flags;
117 sc->mii_anegticks = MII_ANEGTICKS;
118
119 sc->mii_flags |= MIIF_NOISOLATE;
120
121 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
122
123 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
124 BMCR_ISO);
125
126 PHY_RESET(sc);
127
128 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
129 XMPHY_BMCR_FDX);
130 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
131 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
132
133 #undef ADD
134 }
135
136 int
xmphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)137 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
138 {
139 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
140 int reg;
141
142 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
143 return (ENXIO);
144
145 switch (cmd) {
146 case MII_POLLSTAT:
147 /*
148 * If we're not polling our PHY instance, just return.
149 */
150 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
151 return (0);
152 break;
153
154 case MII_MEDIACHG:
155 /*
156 * If the media indicates a different PHY instance,
157 * isolate ourselves.
158 */
159 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
160 reg = PHY_READ(sc, MII_BMCR);
161 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
162 return (0);
163 }
164
165 /*
166 * If the interface is not up, don't do anything.
167 */
168 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
169 break;
170
171 switch (IFM_SUBTYPE(ife->ifm_media)) {
172 case IFM_AUTO:
173 #ifdef foo
174 /*
175 * If we're already in auto mode, just return.
176 */
177 if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
178 return (0);
179 #endif
180 (void) xmphy_mii_phy_auto(sc, 1);
181 break;
182 case IFM_1000_SX:
183 PHY_RESET(sc);
184 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
185 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
186 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
187 } else {
188 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
189 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
190 }
191 break;
192 case IFM_100_T4:
193 case IFM_100_TX:
194 case IFM_10_T:
195 default:
196 return (EINVAL);
197 }
198 break;
199
200 case MII_TICK:
201 /*
202 * If we're not currently selected, just return.
203 */
204 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
205 return (0);
206
207 /*
208 * Is the interface even up?
209 */
210 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
211 return (0);
212
213 /*
214 * Only used for autonegotiation.
215 */
216 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
217 break;
218
219 /*
220 * Check to see if we have link. If we do, we don't
221 * need to restart the autonegotiation process. Read
222 * the BMSR twice in case it's latched.
223 */
224 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
225 if (reg & BMSR_LINK)
226 break;
227
228 /*
229 * Only retry autonegotiation every mii_anegticks seconds.
230 */
231 if (++sc->mii_ticks <= sc->mii_anegticks)
232 break;
233
234 sc->mii_ticks = 0;
235 PHY_RESET(sc);
236
237 if (xmphy_mii_phy_auto(sc, 0) == EJUSTRETURN)
238 return (0);
239
240 break;
241 }
242
243 /* Update the media status. */
244 xmphy_status(sc);
245
246 /* Callback if something changed. */
247 mii_phy_update(sc, cmd);
248 return (0);
249 }
250
251 void
xmphy_status(struct mii_softc * sc)252 xmphy_status(struct mii_softc *sc)
253 {
254 struct mii_data *mii = sc->mii_pdata;
255 int bmsr, bmcr, anlpar;
256
257 mii->mii_media_status = IFM_AVALID;
258 mii->mii_media_active = IFM_ETHER;
259
260 bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
261 PHY_READ(sc, XMPHY_MII_BMSR);
262 if (bmsr & XMPHY_BMSR_LINK)
263 mii->mii_media_status |= IFM_ACTIVE;
264
265 /* Do dummy read of extended status register. */
266 bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
267
268 bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
269
270 if (bmcr & XMPHY_BMCR_LOOP)
271 mii->mii_media_active |= IFM_LOOP;
272
273
274 if (bmcr & XMPHY_BMCR_AUTOEN) {
275 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
276 if (bmsr & XMPHY_BMSR_LINK) {
277 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
278 return;
279 }
280 /* Erg, still trying, I guess... */
281 mii->mii_media_active |= IFM_NONE;
282 return;
283 }
284
285 mii->mii_media_active |= IFM_1000_SX;
286 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
287 PHY_READ(sc, XMPHY_MII_ANLPAR);
288 if (anlpar & XMPHY_ANLPAR_FDX)
289 mii->mii_media_active |= IFM_FDX;
290 else
291 mii->mii_media_active |= IFM_HDX;
292 return;
293 }
294
295 mii->mii_media_active |= IFM_1000_SX;
296 if (bmcr & XMPHY_BMCR_FDX)
297 mii->mii_media_active |= IFM_FDX;
298 else
299 mii->mii_media_active |= IFM_HDX;
300
301 return;
302 }
303
304
305 int
xmphy_mii_phy_auto(struct mii_softc * sc,int waitfor)306 xmphy_mii_phy_auto(struct mii_softc *sc, int waitfor)
307 {
308 int bmsr, anar = 0, i;
309
310 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
311 anar = PHY_READ(sc, XMPHY_MII_ANAR);
312 anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
313 PHY_WRITE(sc, XMPHY_MII_ANAR, anar);
314 DELAY(1000);
315 PHY_WRITE(sc, XMPHY_MII_BMCR,
316 XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
317 }
318
319 if (waitfor) {
320 /* Wait 500ms for it to complete. */
321 for (i = 0; i < 500; i++) {
322 if ((bmsr = PHY_READ(sc, XMPHY_MII_BMSR)) &
323 XMPHY_BMSR_ACOMP)
324 return (0);
325 DELAY(1000);
326 #if 0
327 if ((bmsr & BMSR_ACOMP) == 0)
328 printf("%s: autonegotiation failed to complete\n",
329 mii->mii_dev.dv_xname);
330 #endif
331 }
332
333 /*
334 * Don't need to worry about clearing MIIF_DOINGAUTO.
335 * If that's set, a timeout is pending, and it will
336 * clear the flag.
337 */
338 return (EIO);
339 }
340
341 /*
342 * Just let it finish asynchronously. This is for the benefit of
343 * the tick handler driving autonegotiation. Don't want 500ms
344 * delays all the time while the system is running!
345 */
346 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
347 sc->mii_flags |= MIIF_DOINGAUTO;
348 timeout_set(&sc->mii_phy_timo, mii_phy_auto_timeout, sc);
349 timeout_add(&sc->mii_phy_timo, hz >> 1);
350 }
351 return (EJUSTRETURN);
352 }
353