1 /* $OpenBSD: xmphy.c,v 1.26 2024/06/26 01:40:49 jsg 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/device.h>
46 #include <sys/socket.h>
47 #include <sys/errno.h>
48
49 #include <net/if.h>
50 #include <net/if_var.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 int xmphy_probe(struct device *, void *, void *);
58 void xmphy_attach(struct device *, struct device *, void *);
59
60 const struct cfattach xmphy_ca = {
61 sizeof(struct mii_softc), xmphy_probe, xmphy_attach, mii_phy_detach
62 };
63
64 struct cfdriver xmphy_cd = {
65 NULL, "xmphy", DV_DULL
66 };
67
68 int xmphy_service(struct mii_softc *, struct mii_data *, int);
69 void xmphy_status(struct mii_softc *);
70
71 int xmphy_mii_phy_auto(struct mii_softc *);
72
73 const struct mii_phy_funcs xmphy_funcs = {
74 xmphy_service, xmphy_status, mii_phy_reset,
75 };
76
77 static const struct mii_phydesc xmphys[] = {
78 { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII,
79 MII_STR_XAQTI_XMACII },
80
81 { MII_OUI_JATO, MII_MODEL_JATO_BASEX,
82 MII_STR_JATO_BASEX },
83
84 { 0, 0,
85 NULL },
86 };
87
88 int
xmphy_probe(struct device * parent,void * match,void * aux)89 xmphy_probe(struct device *parent, void *match, void *aux)
90 {
91 struct mii_attach_args *ma = aux;
92
93 if (mii_phy_match(ma, xmphys) != NULL)
94 return (10);
95
96 return (0);
97 }
98
99 void
xmphy_attach(struct device * parent,struct device * self,void * aux)100 xmphy_attach(struct device *parent, struct device *self, void *aux)
101 {
102 struct mii_softc *sc = (struct mii_softc *)self;
103 struct mii_attach_args *ma = aux;
104 struct mii_data *mii = ma->mii_data;
105 const struct mii_phydesc *mpd;
106
107 mpd = mii_phy_match(ma, xmphys);
108 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
109
110 sc->mii_inst = mii->mii_instance;
111 sc->mii_phy = ma->mii_phyno;
112 sc->mii_funcs = &xmphy_funcs;
113 sc->mii_pdata = mii;
114 sc->mii_flags = ma->mii_flags;
115 sc->mii_anegticks = MII_ANEGTICKS;
116
117 sc->mii_flags |= MIIF_NOISOLATE;
118
119 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
120
121 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
122 BMCR_ISO);
123
124 PHY_RESET(sc);
125
126 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
127 BMCR_FDX);
128 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
129 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
130
131 #undef ADD
132 }
133
134 int
xmphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)135 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
136 {
137 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
138 int reg;
139
140 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
141 return (ENXIO);
142
143 switch (cmd) {
144 case MII_POLLSTAT:
145 /*
146 * If we're not polling our PHY instance, just return.
147 */
148 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
149 return (0);
150 break;
151
152 case MII_MEDIACHG:
153 /*
154 * If the media indicates a different PHY instance,
155 * isolate ourselves.
156 */
157 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
158 reg = PHY_READ(sc, MII_BMCR);
159 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
160 return (0);
161 }
162
163 /*
164 * If the interface is not up, don't do anything.
165 */
166 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
167 break;
168
169 switch (IFM_SUBTYPE(ife->ifm_media)) {
170 case IFM_AUTO:
171 (void) xmphy_mii_phy_auto(sc);
172 break;
173 case IFM_1000_SX:
174 PHY_RESET(sc);
175 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
176 PHY_WRITE(sc, MII_ANAR, ANAR_10_FD);
177 PHY_WRITE(sc, MII_BMCR, BMCR_FDX);
178 } else {
179 PHY_WRITE(sc, MII_ANAR, ANAR_10);
180 PHY_WRITE(sc, MII_BMCR, 0);
181 }
182 break;
183 default:
184 return (EINVAL);
185 }
186 break;
187
188 case MII_TICK:
189 /*
190 * If we're not currently selected, just return.
191 */
192 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
193 return (0);
194
195 /*
196 * Is the interface even up?
197 */
198 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
199 return (0);
200
201 /*
202 * Only used for autonegotiation.
203 */
204 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
205 break;
206
207 /*
208 * Check to see if we have link. If we do, we don't
209 * need to restart the autonegotiation process. Read
210 * the BMSR twice in case it's latched.
211 */
212 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
213 if (reg & BMSR_LINK) {
214 sc->mii_ticks = 0;
215 break;
216 }
217
218 /*
219 * Only retry autonegotiation every mii_anegticks seconds.
220 */
221 if (++sc->mii_ticks <= sc->mii_anegticks)
222 break;
223
224 sc->mii_ticks = 0;
225 PHY_RESET(sc);
226
227 xmphy_mii_phy_auto(sc);
228 break;
229 }
230
231 /* Update the media status. */
232 mii_phy_status(sc);
233
234 /* Callback if something changed. */
235 mii_phy_update(sc, cmd);
236 return (0);
237 }
238
239 void
xmphy_status(struct mii_softc * sc)240 xmphy_status(struct mii_softc *sc)
241 {
242 struct mii_data *mii = sc->mii_pdata;
243 int bmsr, bmcr, anlpar;
244
245 mii->mii_media_status = IFM_AVALID;
246 mii->mii_media_active = IFM_ETHER;
247
248 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
249 if (bmsr & BMSR_LINK)
250 mii->mii_media_status |= IFM_ACTIVE;
251
252 /* Do dummy read of extended status register. */
253 bmcr = PHY_READ(sc, MII_EXTSR);
254
255 bmcr = PHY_READ(sc, MII_BMCR);
256
257 if (bmcr & BMCR_LOOP)
258 mii->mii_media_active |= IFM_LOOP;
259
260
261 if (bmcr & BMCR_AUTOEN) {
262 if ((bmsr & BMSR_ACOMP) == 0) {
263 if (bmsr & BMSR_LINK) {
264 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
265 return;
266 }
267 /* Erg, still trying, I guess... */
268 mii->mii_media_active |= IFM_NONE;
269 return;
270 }
271
272 mii->mii_media_active |= IFM_1000_SX;
273 anlpar = PHY_READ(sc, MII_ANAR) & PHY_READ(sc, MII_ANLPAR);
274 if (anlpar & ANLPAR_10_FD)
275 mii->mii_media_active |= IFM_FDX;
276 else
277 mii->mii_media_active |= IFM_HDX;
278 return;
279 }
280
281 mii->mii_media_active |= IFM_1000_SX;
282 if (bmcr & BMCR_FDX)
283 mii->mii_media_active |= IFM_FDX;
284 else
285 mii->mii_media_active |= IFM_HDX;
286
287 return;
288 }
289
290
291 int
xmphy_mii_phy_auto(struct mii_softc * sc)292 xmphy_mii_phy_auto(struct mii_softc *sc)
293 {
294 int anar = 0;
295
296 anar = PHY_READ(sc, MII_ANAR);
297 anar |= ANAR_10_FD|ANAR_10;
298 PHY_WRITE(sc, MII_ANAR, anar);
299 DELAY(1000);
300 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
301
302 return (EJUSTRETURN);
303 }
304