1 /* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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.
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>
54 #include <net/if_media.h>
56 #include <dev/mii/mii.h>
57 #include <dev/mii/miivar.h>
59 #include "miibus_if.h"
62 static const char rcsid[] =
63 "$FreeBSD: src/sys/dev/mii/mii.c,v 1.6.2.2 2002/08/19 16:56:33 ambrisko Exp $";
66 static int miibus_readreg __P((device_t, int, int));
67 static int miibus_writereg __P((device_t, int, int, int));
68 static void miibus_statchg __P((device_t));
69 static void miibus_mediainit __P((device_t));
71 static device_method_t miibus_methods[] = {
72 /* device interface */
73 DEVMETHOD(device_probe, miibus_probe),
74 DEVMETHOD(device_attach, miibus_attach),
75 DEVMETHOD(device_detach, miibus_detach),
76 DEVMETHOD(device_shutdown, bus_generic_shutdown),
79 DEVMETHOD(bus_print_child, bus_generic_print_child),
80 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
83 DEVMETHOD(miibus_readreg, miibus_readreg),
84 DEVMETHOD(miibus_writereg, miibus_writereg),
85 DEVMETHOD(miibus_statchg, miibus_statchg),
86 DEVMETHOD(miibus_mediainit, miibus_mediainit),
91 devclass_t miibus_devclass;
93 driver_t miibus_driver = {
96 sizeof(struct mii_data)
100 * Helper function used by network interface drivers, attaches PHYs
101 * to the network interface driver parent.
104 int miibus_probe(dev)
107 struct mii_attach_args ma, *args;
108 struct mii_data *mii;
109 device_t child = NULL, parent;
110 int bmsr, capmask = 0xFFFFFFFF;
112 mii = device_get_softc(dev);
113 parent = device_get_parent(dev);
114 LIST_INIT(&mii->mii_phys);
116 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
118 * Check to see if there is a PHY at this address. Note,
119 * many braindead PHYs report 0/0 in their ID registers,
120 * so we test for media in the BMSR.
122 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR);
123 if (bmsr == 0 || bmsr == 0xffff ||
124 (bmsr & BMSR_MEDIAMASK) == 0) {
125 /* Assume no PHY at this address. */
130 * Extract the IDs. Braindead PHYs will be handled by
131 * the `ukphy' driver, as we have no ID information to
134 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
136 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
140 ma.mii_capmask = capmask;
142 args = malloc(sizeof(struct mii_attach_args),
144 bcopy((char *)&ma, (char *)args, sizeof(ma));
145 child = device_add_child(dev, NULL, -1);
146 device_set_ivars(child, args);
152 device_set_desc(dev, "MII bus");
157 int miibus_attach(dev)
161 ifm_change_cb_t ifmedia_upd;
162 ifm_stat_cb_t ifmedia_sts;
163 struct mii_data *mii;
165 mii = device_get_softc(dev);
166 mii->mii_ifp = device_get_softc(device_get_parent(dev));
167 v = device_get_ivars(dev);
170 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts);
171 bus_generic_attach(dev);
176 int miibus_detach(dev)
179 struct mii_data *mii;
181 bus_generic_detach(dev);
182 mii = device_get_softc(dev);
183 ifmedia_removeall(&mii->mii_media);
189 static int miibus_readreg(dev, phy, reg)
195 parent = device_get_parent(dev);
196 return(MIIBUS_READREG(parent, phy, reg));
199 static int miibus_writereg(dev, phy, reg, data)
205 parent = device_get_parent(dev);
206 return(MIIBUS_WRITEREG(parent, phy, reg, data));
209 static void miibus_statchg(dev)
214 parent = device_get_parent(dev);
215 MIIBUS_STATCHG(parent);
219 static void miibus_mediainit(dev)
222 struct mii_data *mii;
223 struct ifmedia_entry *m;
226 /* Poke the parent in case it has any media of its own to add. */
227 MIIBUS_MEDIAINIT(device_get_parent(dev));
229 mii = device_get_softc(dev);
230 for (m = LIST_FIRST(&mii->mii_media.ifm_list); m != NULL;
231 m = LIST_NEXT(m, ifm_list)) {
232 media = m->ifm_media;
233 if (media == (IFM_ETHER|IFM_AUTO))
237 ifmedia_set(&mii->mii_media, media);
242 int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts)
245 ifm_change_cb_t ifmedia_upd;
246 ifm_stat_cb_t ifmedia_sts;
251 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT);
254 *child = device_add_child(dev, "miibus", -1);
255 device_set_ivars(*child, v);
257 for (i = 0; i < MII_NPHY; i++) {
258 bmsr = MIIBUS_READREG(dev, i, MII_BMSR);
259 if (bmsr == 0 || bmsr == 0xffff ||
260 (bmsr & BMSR_MEDIAMASK) == 0) {
261 /* Assume no PHY at this address. */
268 device_delete_child(dev, *child);
273 bus_generic_attach(dev);
279 * Media changed; notify all PHYs.
283 struct mii_data *mii;
285 struct mii_softc *child;
288 mii->mii_media_status = 0;
289 mii->mii_media_active = IFM_NONE;
291 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
292 child = LIST_NEXT(child, mii_list)) {
293 rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
301 * Call the PHY tick routines, used during autonegotiation.
305 struct mii_data *mii;
307 struct mii_softc *child;
309 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
310 child = LIST_NEXT(child, mii_list))
311 (void) (*child->mii_service)(child, mii, MII_TICK);
315 * Get media status from PHYs.
319 struct mii_data *mii;
321 struct mii_softc *child;
323 mii->mii_media_status = 0;
324 mii->mii_media_active = IFM_NONE;
326 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
327 child = LIST_NEXT(child, mii_list))
328 (void) (*child->mii_service)(child, mii, MII_POLLSTAT);