1 /* $OpenBSD: nsphy.c,v 1.19 2005/03/26 04:40:09 krw Exp $ */
2 /* $NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the NetBSD
23 * Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 * contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 */
40
41 /*
42 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
43 *
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
46 * are met:
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 * must display the following acknowledgement:
54 * This product includes software developed by Manuel Bouyer.
55 * 4. The name of the author may not be used to endorse or promote products
56 * derived from this software without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68 */
69
70 /*
71 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
72 * Data Sheet available from www.national.com
73 */
74
75 #include <sys/param.h>
76 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/device.h>
79 #include <sys/socket.h>
80 #include <sys/errno.h>
81
82 #include <net/if.h>
83 #include <net/if_media.h>
84
85 #include <dev/mii/mii.h>
86 #include <dev/mii/miivar.h>
87 #include <dev/mii/miidevs.h>
88
89 #include <dev/mii/nsphyreg.h>
90
91 int nsphymatch(struct device *, void *, void *);
92 void nsphyattach(struct device *, struct device *, void *);
93
94 struct cfattach nsphy_ca = {
95 sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach,
96 mii_phy_activate
97 };
98
99 struct cfdriver nsphy_cd = {
100 NULL, "nsphy", DV_DULL
101 };
102
103 int nsphy_service(struct mii_softc *, struct mii_data *, int);
104 void nsphy_status(struct mii_softc *);
105 void nsphy_reset(struct mii_softc *);
106
107 const struct mii_phy_funcs nsphy_funcs = {
108 nsphy_service, nsphy_status, nsphy_reset,
109 };
110
111 static const struct mii_phydesc nsphys[] = {
112 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840,
113 MII_STR_NATSEMI_DP83840 },
114
115 { 0, 0,
116 NULL },
117 };
118
119 int
nsphymatch(struct device * parent,void * match,void * aux)120 nsphymatch(struct device *parent, void *match, void *aux)
121 {
122 struct mii_attach_args *ma = aux;
123
124 if (mii_phy_match(ma, nsphys) != NULL)
125 return (10);
126
127 return (0);
128 }
129
130 void
nsphyattach(struct device * parent,struct device * self,void * aux)131 nsphyattach(struct device *parent, struct device *self, void *aux)
132 {
133 struct mii_softc *sc = (struct mii_softc *)self;
134 struct mii_attach_args *ma = aux;
135 struct mii_data *mii = ma->mii_data;
136 const struct mii_phydesc *mpd;
137
138 mpd = mii_phy_match(ma, nsphys);
139 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
140
141 sc->mii_inst = mii->mii_instance;
142 sc->mii_phy = ma->mii_phyno;
143 sc->mii_funcs = &nsphy_funcs;
144 sc->mii_pdata = mii;
145 sc->mii_flags = ma->mii_flags;
146 sc->mii_anegticks = MII_ANEGTICKS;
147
148 PHY_RESET(sc);
149
150 sc->mii_capabilities =
151 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
152 if (sc->mii_capabilities & BMSR_MEDIAMASK)
153 mii_phy_add_media(sc);
154 }
155
156 int
nsphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)157 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
158 {
159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
160 int reg;
161
162 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
163 return (ENXIO);
164
165 switch (cmd) {
166 case MII_POLLSTAT:
167 /*
168 * If we're not polling our PHY instance, just return.
169 */
170 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
171 return (0);
172 break;
173
174 case MII_MEDIACHG:
175 /*
176 * If the media indicates a different PHY instance,
177 * isolate ourselves.
178 */
179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
180 reg = PHY_READ(sc, MII_BMCR);
181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
182 return (0);
183 }
184
185 /*
186 * If the interface is not up, don't do anything.
187 */
188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
189 break;
190
191 reg = PHY_READ(sc, MII_NSPHY_PCR);
192
193 /*
194 * Set up the PCR to use LED4 to indicate full-duplex
195 * in both 10baseT and 100baseTX modes.
196 */
197 reg |= PCR_LED4MODE;
198
199 /*
200 * Make sure Carrier Integrity Monitor function is
201 * disabled (normal for Node operation, but sometimes
202 * it's not set?!)
203 */
204 reg |= PCR_CIMDIS;
205
206 /*
207 * Make sure "force link good" is set to normal mode.
208 * It's only intended for debugging.
209 */
210 reg |= PCR_FLINK100;
211
212 /*
213 * Mystery bits which are supposedly `reserved',
214 * but we seem to need to set them when the PHY
215 * is connected to some interfaces!
216 */
217 reg |= PCR_CONGCTRL | PCR_TXREADYSEL;
218
219 PHY_WRITE(sc, MII_NSPHY_PCR, reg);
220
221 mii_phy_setmedia(sc);
222 break;
223
224 case MII_TICK:
225 /*
226 * If we're not currently selected, just return.
227 */
228 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
229 return (0);
230
231 if (mii_phy_tick(sc) == EJUSTRETURN)
232 return (0);
233 break;
234
235 case MII_DOWN:
236 mii_phy_down(sc);
237 return (0);
238 }
239
240 /* Update the media status. */
241 mii_phy_status(sc);
242
243 /* Callback if something changed. */
244 mii_phy_update(sc, cmd);
245 return (0);
246 }
247
248 void
nsphy_status(struct mii_softc * sc)249 nsphy_status(struct mii_softc *sc)
250 {
251 struct mii_data *mii = sc->mii_pdata;
252 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
253 int bmsr, bmcr, par, anlpar;
254
255 mii->mii_media_status = IFM_AVALID;
256 mii->mii_media_active = IFM_ETHER;
257
258 bmsr = PHY_READ(sc, MII_BMSR) |
259 PHY_READ(sc, MII_BMSR);
260 if (bmsr & BMSR_LINK)
261 mii->mii_media_status |= IFM_ACTIVE;
262
263 bmcr = PHY_READ(sc, MII_BMCR);
264 if (bmcr & BMCR_ISO) {
265 mii->mii_media_active |= IFM_NONE;
266 mii->mii_media_status = 0;
267 return;
268 }
269
270 if (bmcr & BMCR_LOOP)
271 mii->mii_media_active |= IFM_LOOP;
272
273 if (bmcr & BMCR_AUTOEN) {
274 /*
275 * The PAR status bits are only valid of autonegotiation
276 * has completed (or it's disabled).
277 */
278 if ((bmsr & BMSR_ACOMP) == 0) {
279 /* Erg, still trying, I guess... */
280 mii->mii_media_active |= IFM_NONE;
281 return;
282 }
283
284 /*
285 * Argh. The PAR doesn't seem to indicate duplex mode
286 * properly! Determine media based on link partner's
287 * advertised capabilities.
288 */
289 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
290 anlpar = PHY_READ(sc, MII_ANAR) &
291 PHY_READ(sc, MII_ANLPAR);
292 if (anlpar & ANLPAR_T4)
293 mii->mii_media_active |= IFM_100_T4;
294 else if (anlpar & ANLPAR_TX_FD)
295 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
296 else if (anlpar & ANLPAR_TX)
297 mii->mii_media_active |= IFM_100_TX;
298 else if (anlpar & ANLPAR_10_FD)
299 mii->mii_media_active |= IFM_10_T|IFM_FDX;
300 else if (anlpar & ANLPAR_10)
301 mii->mii_media_active |= IFM_10_T;
302 else
303 mii->mii_media_active |= IFM_NONE;
304 return;
305 }
306
307 /*
308 * Link partner is not capable of autonegotiation.
309 * We will never be in full-duplex mode if this is
310 * the case, so reading the PAR is OK.
311 */
312 par = PHY_READ(sc, MII_NSPHY_PAR);
313 if (par & PAR_10)
314 mii->mii_media_active |= IFM_10_T;
315 else
316 mii->mii_media_active |= IFM_100_TX;
317 #if 0
318 if (par & PAR_FDX)
319 mii->mii_media_active |= IFM_FDX;
320 #endif
321 } else
322 mii->mii_media_active = ife->ifm_media;
323 }
324
325 void
nsphy_reset(struct mii_softc * sc)326 nsphy_reset(struct mii_softc *sc)
327 {
328 int anar;
329
330 mii_phy_reset(sc);
331 anar = PHY_READ(sc, MII_ANAR);
332 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR));
333 PHY_WRITE(sc, MII_ANAR, anar);
334 }
335