FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphy.c
1 /* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999 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 National Semiconductor's DP83840A ethernet 10/100 PHY
71 * Data Sheet available from www.national.com
72 */
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/kernel.h>
77 #include <sys/socket.h>
78 #include <sys/errno.h>
79 #include <sys/module.h>
80 #include <sys/bus.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 #include "miibus_if.h"
92
93 #if !defined(lint)
94 static const char rcsid[] =
95 "$FreeBSD: releng/5.0/sys/dev/mii/nsphy.c 105135 2002-10-14 22:31:52Z alfred $";
96 #endif
97
98 static int nsphy_probe(device_t);
99 static int nsphy_attach(device_t);
100
101 static device_method_t nsphy_methods[] = {
102 /* device interface */
103 DEVMETHOD(device_probe, nsphy_probe),
104 DEVMETHOD(device_attach, nsphy_attach),
105 DEVMETHOD(device_detach, mii_phy_detach),
106 DEVMETHOD(device_shutdown, bus_generic_shutdown),
107 { 0, 0 }
108 };
109
110 static devclass_t nsphy_devclass;
111
112 static driver_t nsphy_driver = {
113 "nsphy",
114 nsphy_methods,
115 sizeof(struct mii_softc)
116 };
117
118 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
119
120 static int nsphy_service(struct mii_softc *, struct mii_data *, int);
121 static void nsphy_status(struct mii_softc *);
122
123 static int
124 nsphy_probe(dev)
125 device_t dev;
126 {
127 struct mii_attach_args *ma;
128
129 ma = device_get_ivars(dev);
130
131 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI &&
132 MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) {
133 device_set_desc(dev, MII_STR_NATSEMI_DP83840);
134 } else
135 return (ENXIO);
136
137 return (0);
138 }
139
140 static int
141 nsphy_attach(dev)
142 device_t dev;
143 {
144 struct mii_softc *sc;
145 struct mii_attach_args *ma;
146 struct mii_data *mii;
147
148 sc = device_get_softc(dev);
149 ma = device_get_ivars(dev);
150 sc->mii_dev = device_get_parent(dev);
151 mii = device_get_softc(sc->mii_dev);
152 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
153
154 sc->mii_inst = mii->mii_instance;
155 sc->mii_phy = ma->mii_phyno;
156 sc->mii_service = nsphy_service;
157 sc->mii_pdata = mii;
158
159 #ifdef foo
160 /*
161 * i82557 wedges if all of its PHYs are isolated!
162 */
163 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
164 "fxp") == 0 && mii->mii_instance == 0)
165 #endif
166
167 sc->mii_flags |= MIIF_NOISOLATE;
168 mii->mii_instance++;
169
170 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
171
172 #if 0
173 /* Can't do this on the i82557! */
174 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
175 BMCR_ISO);
176 #endif
177 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
178 BMCR_LOOP|BMCR_S100);
179
180 mii_phy_reset(sc);
181
182 sc->mii_capabilities =
183 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
184 device_printf(dev, " ");
185 mii_add_media(sc);
186 printf("\n");
187 #undef ADD
188
189 MIIBUS_MEDIAINIT(sc->mii_dev);
190 return(0);
191 }
192
193 static int
194 nsphy_service(sc, mii, cmd)
195 struct mii_softc *sc;
196 struct mii_data *mii;
197 int cmd;
198 {
199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
200 int reg;
201
202 switch (cmd) {
203 case MII_POLLSTAT:
204 /*
205 * If we're not polling our PHY instance, just return.
206 */
207 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
208 return (0);
209 break;
210
211 case MII_MEDIACHG:
212 /*
213 * If the media indicates a different PHY instance,
214 * isolate ourselves.
215 */
216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
217 reg = PHY_READ(sc, MII_BMCR);
218 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
219 return (0);
220 }
221
222 /*
223 * If the interface is not up, don't do anything.
224 */
225 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
226 break;
227
228 reg = PHY_READ(sc, MII_NSPHY_PCR);
229
230 /*
231 * Set up the PCR to use LED4 to indicate full-duplex
232 * in both 10baseT and 100baseTX modes.
233 */
234 reg |= PCR_LED4MODE;
235
236 /*
237 * Make sure Carrier Intgrity Monitor function is
238 * disabled (normal for Node operation, but sometimes
239 * it's not set?!)
240 */
241 reg |= PCR_CIMDIS;
242
243 /*
244 * Make sure "force link good" is set to normal mode.
245 * It's only intended for debugging.
246 */
247 reg |= PCR_FLINK100;
248
249 /*
250 * Mystery bits which are supposedly `reserved',
251 * but we seem to need to set them when the PHY
252 * is connected to some interfaces:
253 *
254 * 0x0400 is needed for fxp
255 * (Intel EtherExpress Pro 10+/100B, 82557 chip)
256 * (nsphy with a DP83840 chip)
257 * 0x0100 may be needed for some other card
258 */
259 reg |= 0x0100 | 0x0400;
260
261 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
262 "fxp") == 0)
263 PHY_WRITE(sc, MII_NSPHY_PCR, reg);
264
265 switch (IFM_SUBTYPE(ife->ifm_media)) {
266 case IFM_AUTO:
267 /*
268 * If we're already in auto mode, just return.
269 */
270 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
271 return (0);
272 (void) mii_phy_auto(sc);
273 break;
274 case IFM_100_T4:
275 /*
276 * XXX Not supported as a manual setting right now.
277 */
278 return (EINVAL);
279 default:
280 /*
281 * BMCR data is stored in the ifmedia entry.
282 */
283 PHY_WRITE(sc, MII_ANAR,
284 mii_anar(ife->ifm_media));
285 PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
286 }
287 break;
288
289 case MII_TICK:
290 /*
291 * If we're not currently selected, just return.
292 */
293 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
294 return (0);
295 if (mii_phy_tick(sc) == EJUSTRETURN)
296 return (0);
297 break;
298 }
299
300 /* Update the media status. */
301 nsphy_status(sc);
302
303 /* Callback if something changed. */
304 mii_phy_update(sc, cmd);
305 return (0);
306 }
307
308 static void
309 nsphy_status(sc)
310 struct mii_softc *sc;
311 {
312 struct mii_data *mii = sc->mii_pdata;
313 int bmsr, bmcr, par, anlpar;
314
315 mii->mii_media_status = IFM_AVALID;
316 mii->mii_media_active = IFM_ETHER;
317
318 bmsr = PHY_READ(sc, MII_BMSR) |
319 PHY_READ(sc, MII_BMSR);
320 if (bmsr & BMSR_LINK)
321 mii->mii_media_status |= IFM_ACTIVE;
322
323 bmcr = PHY_READ(sc, MII_BMCR);
324 if (bmcr & BMCR_ISO) {
325 mii->mii_media_active |= IFM_NONE;
326 mii->mii_media_status = 0;
327 return;
328 }
329
330 if (bmcr & BMCR_LOOP)
331 mii->mii_media_active |= IFM_LOOP;
332
333 if (bmcr & BMCR_AUTOEN) {
334 /*
335 * The PAR status bits are only valid of autonegotiation
336 * has completed (or it's disabled).
337 */
338 if ((bmsr & BMSR_ACOMP) == 0) {
339 /* Erg, still trying, I guess... */
340 mii->mii_media_active |= IFM_NONE;
341 return;
342 }
343
344 /*
345 * Argh. The PAR doesn't seem to indicate duplex mode
346 * properly! Determine media based on link partner's
347 * advertised capabilities.
348 */
349 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
350 anlpar = PHY_READ(sc, MII_ANAR) &
351 PHY_READ(sc, MII_ANLPAR);
352 if (anlpar & ANLPAR_T4)
353 mii->mii_media_active |= IFM_100_T4;
354 else if (anlpar & ANLPAR_TX_FD)
355 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
356 else if (anlpar & ANLPAR_TX)
357 mii->mii_media_active |= IFM_100_TX;
358 else if (anlpar & ANLPAR_10_FD)
359 mii->mii_media_active |= IFM_10_T|IFM_FDX;
360 else if (anlpar & ANLPAR_10)
361 mii->mii_media_active |= IFM_10_T;
362 else
363 mii->mii_media_active |= IFM_NONE;
364 return;
365 }
366
367 /*
368 * Link partner is not capable of autonegotiation.
369 * We will never be in full-duplex mode if this is
370 * the case, so reading the PAR is OK.
371 */
372 par = PHY_READ(sc, MII_NSPHY_PAR);
373 if (par & PAR_10)
374 mii->mii_media_active |= IFM_10_T;
375 else
376 mii->mii_media_active |= IFM_100_TX;
377 #if 0
378 if (par & PAR_FDX)
379 mii->mii_media_active |= IFM_FDX;
380 #endif
381 } else
382 mii->mii_media_active |= mii_media_from_bmcr(bmcr);
383 }
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