1 /* $NetBSD: mii.c,v 1.40 2005/12/11 12:22:42 christos Exp $ */
4 * Copyright (c) 1998, 2000 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.
39 * $FreeBSD: src/sys/dev/mii/mii.c,v 1.6.2.2 2002/08/19 16:56:33 ambrisko Exp $
40 * $DragonFly: src/sys/dev/netif/mii_layer/mii.c,v 1.12 2008/07/22 10:59:16 sephe Exp $
44 * MII bus layer, glues MII-capable network interface drivers to sharable
45 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
46 * plus some NetBSD extensions.
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/socket.h>
52 #include <sys/malloc.h>
53 #include <sys/kernel.h>
54 #include <sys/module.h>
58 #include <net/if_media.h>
63 #include "miibus_if.h"
65 static int miibus_probe(device_t);
66 static int miibus_attach(device_t);
67 static int miibus_detach(device_t);
68 static int miibus_readreg(device_t, int, int);
69 static int miibus_writereg(device_t, int, int, int);
70 static void miibus_statchg(device_t);
71 static void miibus_mediainit(device_t);
73 static device_method_t miibus_methods[] = {
74 /* device interface */
75 DEVMETHOD(device_probe, miibus_probe),
76 DEVMETHOD(device_attach, miibus_attach),
77 DEVMETHOD(device_detach, miibus_detach),
78 DEVMETHOD(device_shutdown, bus_generic_shutdown),
81 DEVMETHOD(bus_print_child, bus_generic_print_child),
82 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
85 DEVMETHOD(miibus_readreg, miibus_readreg),
86 DEVMETHOD(miibus_writereg, miibus_writereg),
87 DEVMETHOD(miibus_statchg, miibus_statchg),
88 DEVMETHOD(miibus_mediainit, miibus_mediainit),
93 devclass_t miibus_devclass;
95 driver_t miibus_driver = {
98 sizeof(struct mii_data)
102 * Check to see if there is a PHY at this address. Note,
103 * many braindead PHYs report 0/0 in their ID registers,
104 * so we test for media in the BMSR.
107 miibus_no_phy(device_t dev, const struct mii_probe_args *args, int phyno)
111 if ((args->mii_probemask & (1 << phyno)) == 0)
114 bmsr = MIIBUS_READREG(dev, phyno, MII_BMSR);
115 return (bmsr == 0 || bmsr == 0xffff ||
116 (bmsr & (BMSR_MEDIAMASK | BMSR_EXTSTAT)) == 0);
120 * Helper function used by network interface drivers, attaches PHYs
121 * to the network interface driver parent.
125 miibus_probe(device_t dev)
127 struct mii_attach_args ma, *args;
128 const struct mii_probe_args *probe_args;
129 struct mii_data *mii;
130 device_t child = NULL, parent;
132 probe_args = device_get_ivars(dev);
134 mii = device_get_softc(dev);
135 parent = device_get_parent(dev);
136 LIST_INIT(&mii->mii_phys);
137 bzero(&ma, sizeof(ma));
139 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
140 if (miibus_no_phy(parent, probe_args, ma.mii_phyno))
144 * Extract the IDs. Braindead PHYs will be handled by
145 * the `ukphy' driver, as we have no ID information to
148 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
150 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
154 ma.mii_capmask = probe_args->mii_capmask;
156 args = kmalloc(sizeof(struct mii_attach_args), M_DEVBUF,
159 child = device_add_child(dev, NULL, -1);
160 device_set_ivars(child, args);
165 device_set_desc(dev, "MII bus");
170 miibus_attach(device_t dev)
172 const struct mii_probe_args *probe_args;
173 struct mii_data *mii;
175 mii = device_get_softc(dev);
176 mii->mii_ifp = device_get_softc(device_get_parent(dev));
178 probe_args = device_get_ivars(dev);
179 ifmedia_init(&mii->mii_media, IFM_IMASK,
180 probe_args->mii_ifmedia_upd, probe_args->mii_ifmedia_sts);
182 bus_generic_attach(dev);
187 miibus_detach(device_t dev)
189 struct mii_data *mii;
191 bus_generic_detach(dev);
192 mii = device_get_softc(dev);
193 ifmedia_removeall(&mii->mii_media);
200 miibus_readreg(device_t dev, int phy, int reg)
204 parent = device_get_parent(dev);
205 return MIIBUS_READREG(parent, phy, reg);
209 miibus_writereg(device_t dev, int phy, int reg, int data)
213 parent = device_get_parent(dev);
214 return MIIBUS_WRITEREG(parent, phy, reg, data);
218 miibus_statchg(device_t dev)
222 parent = device_get_parent(dev);
223 MIIBUS_STATCHG(parent);
227 miibus_mediainit(device_t dev)
229 struct mii_data *mii;
230 struct ifmedia_entry *m;
233 /* Poke the parent in case it has any media of its own to add. */
234 MIIBUS_MEDIAINIT(device_get_parent(dev));
236 mii = device_get_softc(dev);
237 for (m = LIST_FIRST(&mii->mii_media.ifm_list); m != NULL;
238 m = LIST_NEXT(m, ifm_list)) {
239 media = m->ifm_media;
240 if (media == (IFM_ETHER|IFM_AUTO))
243 ifmedia_set(&mii->mii_media, media);
247 mii_phy_probe(device_t dev, device_t *child,
248 ifm_change_cb_t ifmedia_upd, ifm_stat_cb_t ifmedia_sts)
250 struct mii_probe_args args;
252 mii_probe_args_init(&args, ifmedia_upd, ifmedia_sts);
253 return mii_probe(dev, child, &args);
257 mii_probe(device_t dev, device_t *child, const struct mii_probe_args *args0)
259 struct mii_probe_args *args;
262 args = kmalloc(sizeof(*args), M_DEVBUF, M_WAITOK);
265 *child = device_add_child(dev, "miibus", -1);
266 device_set_ivars(*child, args);
268 for (i = 0; i < MII_NPHY; i++) {
269 if (!miibus_no_phy(dev, args0, i))
274 device_delete_child(dev, *child);
279 bus_generic_attach(dev);
284 mii_probe_args_init(struct mii_probe_args *args,
285 ifm_change_cb_t ifmedia_upd, ifm_stat_cb_t ifmedia_sts)
287 memset(args, 0, sizeof(*args));
289 args->mii_ifmedia_upd = ifmedia_upd;
290 args->mii_ifmedia_sts = ifmedia_sts;
291 args->mii_probemask = MII_PROBEMASK_DEFAULT;
292 args->mii_capmask = MII_CAPMASK_DEFAULT;
296 * Media changed; notify all PHYs.
299 mii_mediachg(struct mii_data *mii)
301 struct mii_softc *child;
304 mii->mii_media_status = 0;
305 mii->mii_media_active = IFM_NONE;
307 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
308 child = LIST_NEXT(child, mii_list)) {
309 rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
313 /* Reset autonegotiation timer. */
314 child->mii_ticks = 0;
321 * Call the PHY tick routines, used during autonegotiation.
324 mii_tick(struct mii_data *mii)
326 struct mii_softc *child;
328 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
329 child = LIST_NEXT(child, mii_list))
330 (*child->mii_service)(child, mii, MII_TICK);
334 * Get media status from PHYs.
337 mii_pollstat(struct mii_data *mii)
339 struct mii_softc *child;
341 mii->mii_media_status = 0;
342 mii->mii_media_active = IFM_NONE;
344 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
345 child = LIST_NEXT(child, mii_list))
346 (*child->mii_service)(child, mii, MII_POLLSTAT);
349 static moduledata_t miibus_mod = { "miibus" };
351 DECLARE_MODULE(miibus, miibus_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
352 MODULE_VERSION(miibus, 1);