1/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
2
3/*-
4 * Copyright (c) 1998 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 * MII bus layer, glues MII-capable network interface drivers to sharable
42 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
43 * plus some NetBSD extensions.
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/socket.h>
49#include <sys/malloc.h>
50#include <sys/module.h>
51#include <sys/bus.h>
52
53#include <net/if.h>
54#include <net/if_media.h>
55
56#include <dev/mii/mii.h>
57#include <dev/mii/miivar.h>
58
59MODULE_VERSION(miibus, 1);
60
61#include "miibus_if.h"
62
63#if !defined(lint)
64static const char rcsid[] =
| 1/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
2
3/*-
4 * Copyright (c) 1998 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 * MII bus layer, glues MII-capable network interface drivers to sharable
42 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
43 * plus some NetBSD extensions.
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/socket.h>
49#include <sys/malloc.h>
50#include <sys/module.h>
51#include <sys/bus.h>
52
53#include <net/if.h>
54#include <net/if_media.h>
55
56#include <dev/mii/mii.h>
57#include <dev/mii/miivar.h>
58
59MODULE_VERSION(miibus, 1);
60
61#include "miibus_if.h"
62
63#if !defined(lint)
64static const char rcsid[] =
|
66#endif
67
68static int miibus_readreg (device_t, int, int);
69static int miibus_writereg (device_t, int, int, int);
70static void miibus_statchg (device_t);
71static void miibus_linkchg (device_t);
72static void miibus_mediainit (device_t);
73
74static device_method_t miibus_methods[] = {
75 /* device interface */
76 DEVMETHOD(device_probe, miibus_probe),
77 DEVMETHOD(device_attach, miibus_attach),
78 DEVMETHOD(device_detach, miibus_detach),
79 DEVMETHOD(device_shutdown, bus_generic_shutdown),
80
81 /* bus interface */
82 DEVMETHOD(bus_print_child, bus_generic_print_child),
83 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
84
85 /* MII interface */
86 DEVMETHOD(miibus_readreg, miibus_readreg),
87 DEVMETHOD(miibus_writereg, miibus_writereg),
88 DEVMETHOD(miibus_statchg, miibus_statchg),
89 DEVMETHOD(miibus_linkchg, miibus_linkchg),
90 DEVMETHOD(miibus_mediainit, miibus_mediainit),
91
92 { 0, 0 }
93};
94
95devclass_t miibus_devclass;
96
97driver_t miibus_driver = {
98 "miibus",
99 miibus_methods,
100 sizeof(struct mii_data)
101};
102
103/*
104 * Helper function used by network interface drivers, attaches PHYs
105 * to the network interface driver parent.
106 */
107
108int miibus_probe(dev)
109 device_t dev;
110{
111 struct mii_attach_args ma, *args;
112 struct mii_data *mii;
113 device_t child = NULL, parent;
114 int bmsr, capmask = 0xFFFFFFFF;
115
116 mii = device_get_softc(dev);
117 parent = device_get_parent(dev);
118 LIST_INIT(&mii->mii_phys);
119
120 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
121 /*
122 * Check to see if there is a PHY at this address. Note,
123 * many braindead PHYs report 0/0 in their ID registers,
124 * so we test for media in the BMSR.
125 */
126 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR);
127 if (bmsr == 0 || bmsr == 0xffff ||
128 (bmsr & BMSR_MEDIAMASK) == 0) {
129 /* Assume no PHY at this address. */
130 continue;
131 }
132
133 /*
134 * Extract the IDs. Braindead PHYs will be handled by
135 * the `ukphy' driver, as we have no ID information to
136 * match on.
137 */
138 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
139 MII_PHYIDR1);
140 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
141 MII_PHYIDR2);
142
143 ma.mii_data = mii;
144 ma.mii_capmask = capmask;
145
146 args = malloc(sizeof(struct mii_attach_args),
147 M_DEVBUF, M_NOWAIT);
148 bcopy((char *)&ma, (char *)args, sizeof(ma));
149 child = device_add_child(dev, NULL, -1);
150 device_set_ivars(child, args);
151 }
152
153 if (child == NULL)
154 return(ENXIO);
155
156 device_set_desc(dev, "MII bus");
157
158 return(0);
159}
160
161int miibus_attach(dev)
162 device_t dev;
163{
164 void **v;
165 ifm_change_cb_t ifmedia_upd;
166 ifm_stat_cb_t ifmedia_sts;
167 struct mii_data *mii;
168
169 mii = device_get_softc(dev);
170 /*
171 * Note that each NIC's softc must start with an ifnet structure.
172 */
173 mii->mii_ifp = device_get_softc(device_get_parent(dev));
174 v = device_get_ivars(dev);
175 ifmedia_upd = v[0];
176 ifmedia_sts = v[1];
177 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts);
178 bus_generic_attach(dev);
179
180 return(0);
181}
182
183int miibus_detach(dev)
184 device_t dev;
185{
186 struct mii_data *mii;
187
188 bus_generic_detach(dev);
189 mii = device_get_softc(dev);
190 ifmedia_removeall(&mii->mii_media);
191 mii->mii_ifp = NULL;
192
193 return(0);
194}
195
196static int miibus_readreg(dev, phy, reg)
197 device_t dev;
198 int phy, reg;
199{
200 device_t parent;
201
202 parent = device_get_parent(dev);
203 return(MIIBUS_READREG(parent, phy, reg));
204}
205
206static int miibus_writereg(dev, phy, reg, data)
207 device_t dev;
208 int phy, reg, data;
209{
210 device_t parent;
211
212 parent = device_get_parent(dev);
213 return(MIIBUS_WRITEREG(parent, phy, reg, data));
214}
215
216static void miibus_statchg(dev)
217 device_t dev;
218{
219 device_t parent;
220
221 parent = device_get_parent(dev);
222 MIIBUS_STATCHG(parent);
223 return;
224}
225
226static void
227miibus_linkchg(dev)
228 device_t dev;
229{
230 struct mii_data *mii;
231 struct ifnet *ifp;
232 device_t parent;
233 int link;
234
235 parent = device_get_parent(dev);
236 MIIBUS_LINKCHG(parent);
237
238 mii = device_get_softc(dev);
239 /*
240 * Note that each NIC's softc must start with an ifnet structure.
241 */
242 ifp = device_get_softc(parent);
243
244 if (mii->mii_media_status & IFM_AVALID) {
245 if (mii->mii_media_status & IFM_ACTIVE)
246 link = NOTE_LINKUP;
247 else
248 link = NOTE_LINKDOWN;
249 } else {
250 link = NOTE_LINKINV;
251 }
252
253 KNOTE(&ifp->if_klist, link);
254}
255
256static void miibus_mediainit(dev)
257 device_t dev;
258{
259 struct mii_data *mii;
260 struct ifmedia_entry *m;
261 int media = 0;
262
263 /* Poke the parent in case it has any media of its own to add. */
264 MIIBUS_MEDIAINIT(device_get_parent(dev));
265
266 mii = device_get_softc(dev);
267 LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) {
268 media = m->ifm_media;
269 if (media == (IFM_ETHER|IFM_AUTO))
270 break;
271 }
272
273 ifmedia_set(&mii->mii_media, media);
274
275 return;
276}
277
278int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts)
279 device_t dev;
280 device_t *child;
281 ifm_change_cb_t ifmedia_upd;
282 ifm_stat_cb_t ifmedia_sts;
283{
284 void **v;
285 int bmsr, i;
286
287 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT);
288 if (v == 0) {
289 return (ENOMEM);
290 }
291 v[0] = ifmedia_upd;
292 v[1] = ifmedia_sts;
293 *child = device_add_child(dev, "miibus", -1);
294 device_set_ivars(*child, v);
295
296 for (i = 0; i < MII_NPHY; i++) {
297 bmsr = MIIBUS_READREG(dev, i, MII_BMSR);
298 if (bmsr == 0 || bmsr == 0xffff ||
299 (bmsr & BMSR_MEDIAMASK) == 0) {
300 /* Assume no PHY at this address. */
301 continue;
302 } else
303 break;
304 }
305
306 if (i == MII_NPHY) {
307 device_delete_child(dev, *child);
308 *child = NULL;
309 return(ENXIO);
310 }
311
312 bus_generic_attach(dev);
313
314 return(0);
315}
316
317/*
318 * Media changed; notify all PHYs.
319 */
320int
321mii_mediachg(mii)
322 struct mii_data *mii;
323{
324 struct mii_softc *child;
325 int rv;
326
327 mii->mii_media_status = 0;
328 mii->mii_media_active = IFM_NONE;
329
330 LIST_FOREACH(child, &mii->mii_phys, mii_list) {
331 rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
332 if (rv)
333 return (rv);
334 }
335 return (0);
336}
337
338/*
339 * Call the PHY tick routines, used during autonegotiation.
340 */
341void
342mii_tick(mii)
343 struct mii_data *mii;
344{
345 struct mii_softc *child;
346
347 LIST_FOREACH(child, &mii->mii_phys, mii_list)
348 (void) (*child->mii_service)(child, mii, MII_TICK);
349}
350
351/*
352 * Get media status from PHYs.
353 */
354void
355mii_pollstat(mii)
356 struct mii_data *mii;
357{
358 struct mii_softc *child;
359
360 mii->mii_media_status = 0;
361 mii->mii_media_active = IFM_NONE;
362
363 LIST_FOREACH(child, &mii->mii_phys, mii_list)
364 (void) (*child->mii_service)(child, mii, MII_POLLSTAT);
365}
| 66#endif
67
68static int miibus_readreg (device_t, int, int);
69static int miibus_writereg (device_t, int, int, int);
70static void miibus_statchg (device_t);
71static void miibus_linkchg (device_t);
72static void miibus_mediainit (device_t);
73
74static device_method_t miibus_methods[] = {
75 /* device interface */
76 DEVMETHOD(device_probe, miibus_probe),
77 DEVMETHOD(device_attach, miibus_attach),
78 DEVMETHOD(device_detach, miibus_detach),
79 DEVMETHOD(device_shutdown, bus_generic_shutdown),
80
81 /* bus interface */
82 DEVMETHOD(bus_print_child, bus_generic_print_child),
83 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
84
85 /* MII interface */
86 DEVMETHOD(miibus_readreg, miibus_readreg),
87 DEVMETHOD(miibus_writereg, miibus_writereg),
88 DEVMETHOD(miibus_statchg, miibus_statchg),
89 DEVMETHOD(miibus_linkchg, miibus_linkchg),
90 DEVMETHOD(miibus_mediainit, miibus_mediainit),
91
92 { 0, 0 }
93};
94
95devclass_t miibus_devclass;
96
97driver_t miibus_driver = {
98 "miibus",
99 miibus_methods,
100 sizeof(struct mii_data)
101};
102
103/*
104 * Helper function used by network interface drivers, attaches PHYs
105 * to the network interface driver parent.
106 */
107
108int miibus_probe(dev)
109 device_t dev;
110{
111 struct mii_attach_args ma, *args;
112 struct mii_data *mii;
113 device_t child = NULL, parent;
114 int bmsr, capmask = 0xFFFFFFFF;
115
116 mii = device_get_softc(dev);
117 parent = device_get_parent(dev);
118 LIST_INIT(&mii->mii_phys);
119
120 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
121 /*
122 * Check to see if there is a PHY at this address. Note,
123 * many braindead PHYs report 0/0 in their ID registers,
124 * so we test for media in the BMSR.
125 */
126 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR);
127 if (bmsr == 0 || bmsr == 0xffff ||
128 (bmsr & BMSR_MEDIAMASK) == 0) {
129 /* Assume no PHY at this address. */
130 continue;
131 }
132
133 /*
134 * Extract the IDs. Braindead PHYs will be handled by
135 * the `ukphy' driver, as we have no ID information to
136 * match on.
137 */
138 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
139 MII_PHYIDR1);
140 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
141 MII_PHYIDR2);
142
143 ma.mii_data = mii;
144 ma.mii_capmask = capmask;
145
146 args = malloc(sizeof(struct mii_attach_args),
147 M_DEVBUF, M_NOWAIT);
148 bcopy((char *)&ma, (char *)args, sizeof(ma));
149 child = device_add_child(dev, NULL, -1);
150 device_set_ivars(child, args);
151 }
152
153 if (child == NULL)
154 return(ENXIO);
155
156 device_set_desc(dev, "MII bus");
157
158 return(0);
159}
160
161int miibus_attach(dev)
162 device_t dev;
163{
164 void **v;
165 ifm_change_cb_t ifmedia_upd;
166 ifm_stat_cb_t ifmedia_sts;
167 struct mii_data *mii;
168
169 mii = device_get_softc(dev);
170 /*
171 * Note that each NIC's softc must start with an ifnet structure.
172 */
173 mii->mii_ifp = device_get_softc(device_get_parent(dev));
174 v = device_get_ivars(dev);
175 ifmedia_upd = v[0];
176 ifmedia_sts = v[1];
177 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts);
178 bus_generic_attach(dev);
179
180 return(0);
181}
182
183int miibus_detach(dev)
184 device_t dev;
185{
186 struct mii_data *mii;
187
188 bus_generic_detach(dev);
189 mii = device_get_softc(dev);
190 ifmedia_removeall(&mii->mii_media);
191 mii->mii_ifp = NULL;
192
193 return(0);
194}
195
196static int miibus_readreg(dev, phy, reg)
197 device_t dev;
198 int phy, reg;
199{
200 device_t parent;
201
202 parent = device_get_parent(dev);
203 return(MIIBUS_READREG(parent, phy, reg));
204}
205
206static int miibus_writereg(dev, phy, reg, data)
207 device_t dev;
208 int phy, reg, data;
209{
210 device_t parent;
211
212 parent = device_get_parent(dev);
213 return(MIIBUS_WRITEREG(parent, phy, reg, data));
214}
215
216static void miibus_statchg(dev)
217 device_t dev;
218{
219 device_t parent;
220
221 parent = device_get_parent(dev);
222 MIIBUS_STATCHG(parent);
223 return;
224}
225
226static void
227miibus_linkchg(dev)
228 device_t dev;
229{
230 struct mii_data *mii;
231 struct ifnet *ifp;
232 device_t parent;
233 int link;
234
235 parent = device_get_parent(dev);
236 MIIBUS_LINKCHG(parent);
237
238 mii = device_get_softc(dev);
239 /*
240 * Note that each NIC's softc must start with an ifnet structure.
241 */
242 ifp = device_get_softc(parent);
243
244 if (mii->mii_media_status & IFM_AVALID) {
245 if (mii->mii_media_status & IFM_ACTIVE)
246 link = NOTE_LINKUP;
247 else
248 link = NOTE_LINKDOWN;
249 } else {
250 link = NOTE_LINKINV;
251 }
252
253 KNOTE(&ifp->if_klist, link);
254}
255
256static void miibus_mediainit(dev)
257 device_t dev;
258{
259 struct mii_data *mii;
260 struct ifmedia_entry *m;
261 int media = 0;
262
263 /* Poke the parent in case it has any media of its own to add. */
264 MIIBUS_MEDIAINIT(device_get_parent(dev));
265
266 mii = device_get_softc(dev);
267 LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) {
268 media = m->ifm_media;
269 if (media == (IFM_ETHER|IFM_AUTO))
270 break;
271 }
272
273 ifmedia_set(&mii->mii_media, media);
274
275 return;
276}
277
278int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts)
279 device_t dev;
280 device_t *child;
281 ifm_change_cb_t ifmedia_upd;
282 ifm_stat_cb_t ifmedia_sts;
283{
284 void **v;
285 int bmsr, i;
286
287 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT);
288 if (v == 0) {
289 return (ENOMEM);
290 }
291 v[0] = ifmedia_upd;
292 v[1] = ifmedia_sts;
293 *child = device_add_child(dev, "miibus", -1);
294 device_set_ivars(*child, v);
295
296 for (i = 0; i < MII_NPHY; i++) {
297 bmsr = MIIBUS_READREG(dev, i, MII_BMSR);
298 if (bmsr == 0 || bmsr == 0xffff ||
299 (bmsr & BMSR_MEDIAMASK) == 0) {
300 /* Assume no PHY at this address. */
301 continue;
302 } else
303 break;
304 }
305
306 if (i == MII_NPHY) {
307 device_delete_child(dev, *child);
308 *child = NULL;
309 return(ENXIO);
310 }
311
312 bus_generic_attach(dev);
313
314 return(0);
315}
316
317/*
318 * Media changed; notify all PHYs.
319 */
320int
321mii_mediachg(mii)
322 struct mii_data *mii;
323{
324 struct mii_softc *child;
325 int rv;
326
327 mii->mii_media_status = 0;
328 mii->mii_media_active = IFM_NONE;
329
330 LIST_FOREACH(child, &mii->mii_phys, mii_list) {
331 rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
332 if (rv)
333 return (rv);
334 }
335 return (0);
336}
337
338/*
339 * Call the PHY tick routines, used during autonegotiation.
340 */
341void
342mii_tick(mii)
343 struct mii_data *mii;
344{
345 struct mii_softc *child;
346
347 LIST_FOREACH(child, &mii->mii_phys, mii_list)
348 (void) (*child->mii_service)(child, mii, MII_TICK);
349}
350
351/*
352 * Get media status from PHYs.
353 */
354void
355mii_pollstat(mii)
356 struct mii_data *mii;
357{
358 struct mii_softc *child;
359
360 mii->mii_media_status = 0;
361 mii->mii_media_active = IFM_NONE;
362
363 LIST_FOREACH(child, &mii->mii_phys, mii_list)
364 (void) (*child->mii_service)(child, mii, MII_POLLSTAT);
365}
|