1/*-
2 * Copyright (c) 2000
3 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/mii/xmphy.c 213229 2010-09-27 20:31:03Z marius $");
35
36/*
37 * driver for the XaQti XMAC II's internal PHY. This is sort of
38 * like a 10/100 PHY, except the only thing we're really autoselecting
39 * here is full/half duplex. Speed is always 1000mbps.
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
45#include <sys/module.h>
46#include <sys/socket.h>
47#include <sys/bus.h>
48
49#include <net/if.h>
50#include <net/if_media.h>
51
52#include <dev/mii/mii.h>
53#include <dev/mii/miivar.h>
54#include "miidevs.h"
55
56#include <dev/mii/xmphyreg.h>
57
58#include "miibus_if.h"
59
60static int xmphy_probe(device_t);
61static int xmphy_attach(device_t);
62
63static device_method_t xmphy_methods[] = {
64 /* device interface */
65 DEVMETHOD(device_probe, xmphy_probe),
66 DEVMETHOD(device_attach, xmphy_attach),
67 DEVMETHOD(device_detach, mii_phy_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 { 0, 0 }
70};
71
72static devclass_t xmphy_devclass;
73
74static driver_t xmphy_driver = {
75 "xmphy",
76 xmphy_methods,
77 sizeof(struct mii_softc)
78};
79
80DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
81
82static int xmphy_service(struct mii_softc *, struct mii_data *, int);
83static void xmphy_status(struct mii_softc *);
84static int xmphy_mii_phy_auto(struct mii_softc *);
85
86static const struct mii_phydesc xmphys[] = {
87 { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII, MII_STR_XAQTI_XMACII },
88 MII_PHY_DESC(JATO, BASEX),
89 MII_PHY_END
90};
91
92static int
93xmphy_probe(device_t dev)
94{
95
96 return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
97}
98
99static int
100xmphy_attach(device_t dev)
101{
102 struct mii_softc *sc;
103 struct mii_attach_args *ma;
104 struct mii_data *mii;
105 const char *sep = "";
106
107 sc = device_get_softc(dev);
108 ma = device_get_ivars(dev);
109 sc->mii_dev = device_get_parent(dev);
110 mii = ma->mii_data;
111 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
112
113 sc->mii_inst = mii->mii_instance;
114 sc->mii_phy = ma->mii_phyno;
115 sc->mii_service = xmphy_service;
116 sc->mii_pdata = mii;
117
118 sc->mii_flags |= MIIF_NOISOLATE;
119 mii->mii_instance++;
120
121#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
122#define PRINT(s) printf("%s%s", sep, s); sep = ", "
123
124 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
125 BMCR_ISO);
126#if 0
127 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
128 BMCR_LOOP|BMCR_S100);
129#endif
130
131 mii_phy_reset(sc);
132
133 device_printf(dev, " ");
134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
135 XMPHY_BMCR_FDX);
136 PRINT("1000baseSX");
137 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
138 PRINT("1000baseSX-FDX");
139 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
140 PRINT("auto");
141
142 printf("\n");
143#undef ADD
144#undef PRINT
145
146 MIIBUS_MEDIAINIT(sc->mii_dev);
147 return (0);
148}
149
150static int
151xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
152{
153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
154 int reg;
155
156 switch (cmd) {
157 case MII_POLLSTAT:
158 /*
159 * If we're not polling our PHY instance, just return.
160 */
161 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
162 return (0);
163 break;
164
165 case MII_MEDIACHG:
166 /*
167 * If the media indicates a different PHY instance,
168 * isolate ourselves.
169 */
170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
171 reg = PHY_READ(sc, MII_BMCR);
172 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
173 return (0);
174 }
175
176 /*
177 * If the interface is not up, don't do anything.
178 */
179 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
180 break;
181
182 switch (IFM_SUBTYPE(ife->ifm_media)) {
183 case IFM_AUTO:
184#ifdef foo
185 /*
186 * If we're already in auto mode, just return.
187 */
188 if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
189 return (0);
190#endif
191 (void) xmphy_mii_phy_auto(sc);
192 break;
193 case IFM_1000_SX:
194 mii_phy_reset(sc);
195 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
196 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
197 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
198 } else {
199 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
200 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
201 }
202 break;
203 case IFM_100_T4:
204 case IFM_100_TX:
205 case IFM_10_T:
206 default:
207 return (EINVAL);
208 }
209 break;
210
211 case MII_TICK:
212 /*
213 * If we're not currently selected, just return.
214 */
215 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
216 return (0);
217
218 /*
219 * Is the interface even up?
220 */
221 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
222 return (0);
223
224 /*
225 * Only used for autonegotiation.
226 */
227 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
228 break;
229
230 /*
231 * Check to see if we have link. If we do, we don't
232 * need to restart the autonegotiation process. Read
233 * the BMSR twice in case it's latched.
234 */
235 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
236 if (reg & BMSR_LINK)
237 break;
238
239 /*
240 * Only retry autonegotiation every 5 seconds.
241 */
242 if (++sc->mii_ticks <= MII_ANEGTICKS)
243 break;
244
245 sc->mii_ticks = 0;
246
247 mii_phy_reset(sc);
248 xmphy_mii_phy_auto(sc);
249 return (0);
250 }
251
252 /* Update the media status. */
253 xmphy_status(sc);
254
255 /* Callback if something changed. */
256 mii_phy_update(sc, cmd);
257 return (0);
258}
259
260static void
261xmphy_status(struct mii_softc *sc)
262{
263 struct mii_data *mii = sc->mii_pdata;
264 int bmsr, bmcr, anlpar;
265
266 mii->mii_media_status = IFM_AVALID;
267 mii->mii_media_active = IFM_ETHER;
268
269 bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
270 PHY_READ(sc, XMPHY_MII_BMSR);
271 if (bmsr & XMPHY_BMSR_LINK)
272 mii->mii_media_status |= IFM_ACTIVE;
273
274 /* Do dummy read of extended status register. */
275 bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
276
277 bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
278
279 if (bmcr & XMPHY_BMCR_LOOP)
280 mii->mii_media_active |= IFM_LOOP;
281
282
283 if (bmcr & XMPHY_BMCR_AUTOEN) {
284 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
285 if (bmsr & XMPHY_BMSR_LINK) {
286 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
287 return;
288 }
289 /* Erg, still trying, I guess... */
290 mii->mii_media_active |= IFM_NONE;
291 return;
292 }
293
294 mii->mii_media_active |= IFM_1000_SX;
295 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
296 PHY_READ(sc, XMPHY_MII_ANLPAR);
297 if (anlpar & XMPHY_ANLPAR_FDX)
298 mii->mii_media_active |= IFM_FDX;
299 else
300 mii->mii_media_active |= IFM_HDX;
301 return;
302 }
303
304 mii->mii_media_active |= IFM_1000_SX;
305 if (bmcr & XMPHY_BMCR_FDX)
306 mii->mii_media_active |= IFM_FDX;
307 else
308 mii->mii_media_active |= IFM_HDX;
309}
310
311static int
312xmphy_mii_phy_auto(struct mii_softc *mii)
313{
314 int anar = 0;
315
316 anar = PHY_READ(mii, XMPHY_MII_ANAR);
317 anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
318 PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
319 DELAY(1000);
320 PHY_WRITE(mii, XMPHY_MII_BMCR,
321 XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
322
323 return (EJUSTRETURN);
324}
2 * Copyright (c) 2000
3 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/mii/xmphy.c 213229 2010-09-27 20:31:03Z marius $");
35
36/*
37 * driver for the XaQti XMAC II's internal PHY. This is sort of
38 * like a 10/100 PHY, except the only thing we're really autoselecting
39 * here is full/half duplex. Speed is always 1000mbps.
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
45#include <sys/module.h>
46#include <sys/socket.h>
47#include <sys/bus.h>
48
49#include <net/if.h>
50#include <net/if_media.h>
51
52#include <dev/mii/mii.h>
53#include <dev/mii/miivar.h>
54#include "miidevs.h"
55
56#include <dev/mii/xmphyreg.h>
57
58#include "miibus_if.h"
59
60static int xmphy_probe(device_t);
61static int xmphy_attach(device_t);
62
63static device_method_t xmphy_methods[] = {
64 /* device interface */
65 DEVMETHOD(device_probe, xmphy_probe),
66 DEVMETHOD(device_attach, xmphy_attach),
67 DEVMETHOD(device_detach, mii_phy_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 { 0, 0 }
70};
71
72static devclass_t xmphy_devclass;
73
74static driver_t xmphy_driver = {
75 "xmphy",
76 xmphy_methods,
77 sizeof(struct mii_softc)
78};
79
80DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
81
82static int xmphy_service(struct mii_softc *, struct mii_data *, int);
83static void xmphy_status(struct mii_softc *);
84static int xmphy_mii_phy_auto(struct mii_softc *);
85
86static const struct mii_phydesc xmphys[] = {
87 { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII, MII_STR_XAQTI_XMACII },
88 MII_PHY_DESC(JATO, BASEX),
89 MII_PHY_END
90};
91
92static int
93xmphy_probe(device_t dev)
94{
95
96 return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
97}
98
99static int
100xmphy_attach(device_t dev)
101{
102 struct mii_softc *sc;
103 struct mii_attach_args *ma;
104 struct mii_data *mii;
105 const char *sep = "";
106
107 sc = device_get_softc(dev);
108 ma = device_get_ivars(dev);
109 sc->mii_dev = device_get_parent(dev);
110 mii = ma->mii_data;
111 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
112
113 sc->mii_inst = mii->mii_instance;
114 sc->mii_phy = ma->mii_phyno;
115 sc->mii_service = xmphy_service;
116 sc->mii_pdata = mii;
117
118 sc->mii_flags |= MIIF_NOISOLATE;
119 mii->mii_instance++;
120
121#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
122#define PRINT(s) printf("%s%s", sep, s); sep = ", "
123
124 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
125 BMCR_ISO);
126#if 0
127 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
128 BMCR_LOOP|BMCR_S100);
129#endif
130
131 mii_phy_reset(sc);
132
133 device_printf(dev, " ");
134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
135 XMPHY_BMCR_FDX);
136 PRINT("1000baseSX");
137 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
138 PRINT("1000baseSX-FDX");
139 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
140 PRINT("auto");
141
142 printf("\n");
143#undef ADD
144#undef PRINT
145
146 MIIBUS_MEDIAINIT(sc->mii_dev);
147 return (0);
148}
149
150static int
151xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
152{
153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
154 int reg;
155
156 switch (cmd) {
157 case MII_POLLSTAT:
158 /*
159 * If we're not polling our PHY instance, just return.
160 */
161 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
162 return (0);
163 break;
164
165 case MII_MEDIACHG:
166 /*
167 * If the media indicates a different PHY instance,
168 * isolate ourselves.
169 */
170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
171 reg = PHY_READ(sc, MII_BMCR);
172 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
173 return (0);
174 }
175
176 /*
177 * If the interface is not up, don't do anything.
178 */
179 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
180 break;
181
182 switch (IFM_SUBTYPE(ife->ifm_media)) {
183 case IFM_AUTO:
184#ifdef foo
185 /*
186 * If we're already in auto mode, just return.
187 */
188 if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
189 return (0);
190#endif
191 (void) xmphy_mii_phy_auto(sc);
192 break;
193 case IFM_1000_SX:
194 mii_phy_reset(sc);
195 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
196 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
197 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
198 } else {
199 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
200 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
201 }
202 break;
203 case IFM_100_T4:
204 case IFM_100_TX:
205 case IFM_10_T:
206 default:
207 return (EINVAL);
208 }
209 break;
210
211 case MII_TICK:
212 /*
213 * If we're not currently selected, just return.
214 */
215 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
216 return (0);
217
218 /*
219 * Is the interface even up?
220 */
221 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
222 return (0);
223
224 /*
225 * Only used for autonegotiation.
226 */
227 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
228 break;
229
230 /*
231 * Check to see if we have link. If we do, we don't
232 * need to restart the autonegotiation process. Read
233 * the BMSR twice in case it's latched.
234 */
235 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
236 if (reg & BMSR_LINK)
237 break;
238
239 /*
240 * Only retry autonegotiation every 5 seconds.
241 */
242 if (++sc->mii_ticks <= MII_ANEGTICKS)
243 break;
244
245 sc->mii_ticks = 0;
246
247 mii_phy_reset(sc);
248 xmphy_mii_phy_auto(sc);
249 return (0);
250 }
251
252 /* Update the media status. */
253 xmphy_status(sc);
254
255 /* Callback if something changed. */
256 mii_phy_update(sc, cmd);
257 return (0);
258}
259
260static void
261xmphy_status(struct mii_softc *sc)
262{
263 struct mii_data *mii = sc->mii_pdata;
264 int bmsr, bmcr, anlpar;
265
266 mii->mii_media_status = IFM_AVALID;
267 mii->mii_media_active = IFM_ETHER;
268
269 bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
270 PHY_READ(sc, XMPHY_MII_BMSR);
271 if (bmsr & XMPHY_BMSR_LINK)
272 mii->mii_media_status |= IFM_ACTIVE;
273
274 /* Do dummy read of extended status register. */
275 bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
276
277 bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
278
279 if (bmcr & XMPHY_BMCR_LOOP)
280 mii->mii_media_active |= IFM_LOOP;
281
282
283 if (bmcr & XMPHY_BMCR_AUTOEN) {
284 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
285 if (bmsr & XMPHY_BMSR_LINK) {
286 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
287 return;
288 }
289 /* Erg, still trying, I guess... */
290 mii->mii_media_active |= IFM_NONE;
291 return;
292 }
293
294 mii->mii_media_active |= IFM_1000_SX;
295 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
296 PHY_READ(sc, XMPHY_MII_ANLPAR);
297 if (anlpar & XMPHY_ANLPAR_FDX)
298 mii->mii_media_active |= IFM_FDX;
299 else
300 mii->mii_media_active |= IFM_HDX;
301 return;
302 }
303
304 mii->mii_media_active |= IFM_1000_SX;
305 if (bmcr & XMPHY_BMCR_FDX)
306 mii->mii_media_active |= IFM_FDX;
307 else
308 mii->mii_media_active |= IFM_HDX;
309}
310
311static int
312xmphy_mii_phy_auto(struct mii_softc *mii)
313{
314 int anar = 0;
315
316 anar = PHY_READ(mii, XMPHY_MII_ANAR);
317 anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
318 PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
319 DELAY(1000);
320 PHY_WRITE(mii, XMPHY_MII_BMCR,
321 XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
322
323 return (EJUSTRETURN);
324}