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_readreg (device_t, int, int);
66 static int miibus_writereg (device_t, int, int, int);
67 static void miibus_statchg (device_t);
68 static void miibus_mediainit (device_t);
70 static device_method_t miibus_methods[] = {
71 /* device interface */
72 DEVMETHOD(device_probe, miibus_probe),
73 DEVMETHOD(device_attach, miibus_attach),
74 DEVMETHOD(device_detach, miibus_detach),
75 DEVMETHOD(device_shutdown, bus_generic_shutdown),
78 DEVMETHOD(bus_print_child, bus_generic_print_child),
79 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
82 DEVMETHOD(miibus_readreg, miibus_readreg),
83 DEVMETHOD(miibus_writereg, miibus_writereg),
84 DEVMETHOD(miibus_statchg, miibus_statchg),
85 DEVMETHOD(miibus_mediainit, miibus_mediainit),
90 devclass_t miibus_devclass;
92 driver_t miibus_driver = {
95 sizeof(struct mii_data)
99 * Check to see if there is a PHY at this address. Note,
100 * many braindead PHYs report 0/0 in their ID registers,
101 * so we test for media in the BMSR.
104 miibus_no_phy(device_t dev, int phyno)
108 bmsr = MIIBUS_READREG(dev, phyno, MII_BMSR);
109 return (bmsr == 0 || bmsr == 0xffff ||
110 (bmsr & (BMSR_MEDIAMASK | BMSR_EXTSTAT)) == 0);
114 * Helper function used by network interface drivers, attaches PHYs
115 * to the network interface driver parent.
119 miibus_probe(device_t dev)
121 struct mii_attach_args ma, *args;
122 struct mii_data *mii;
123 device_t child = NULL, parent;
124 int capmask = 0xFFFFFFFF;
126 mii = device_get_softc(dev);
127 parent = device_get_parent(dev);
128 LIST_INIT(&mii->mii_phys);
129 bzero(&ma, sizeof(ma));
131 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
132 if (miibus_no_phy(parent, ma.mii_phyno))
136 * Extract the IDs. Braindead PHYs will be handled by
137 * the `ukphy' driver, as we have no ID information to
140 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
142 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
146 ma.mii_capmask = capmask;
148 args = kmalloc(sizeof(struct mii_attach_args),
149 M_DEVBUF, M_INTWAIT);
151 child = device_add_child(dev, NULL, -1);
152 device_set_ivars(child, args);
158 device_set_desc(dev, "MII bus");
164 miibus_attach(device_t dev)
167 ifm_change_cb_t ifmedia_upd;
168 ifm_stat_cb_t ifmedia_sts;
169 struct mii_data *mii;
171 mii = device_get_softc(dev);
172 mii->mii_ifp = device_get_softc(device_get_parent(dev));
173 v = device_get_ivars(dev);
176 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts);
177 bus_generic_attach(dev);
183 miibus_detach(device_t dev)
185 struct mii_data *mii;
187 bus_generic_detach(dev);
188 mii = device_get_softc(dev);
189 ifmedia_removeall(&mii->mii_media);
196 miibus_readreg(device_t dev, int phy, int reg)
200 parent = device_get_parent(dev);
201 return(MIIBUS_READREG(parent, phy, reg));
205 miibus_writereg(device_t dev, int phy, int reg, int data)
209 parent = device_get_parent(dev);
210 return(MIIBUS_WRITEREG(parent, phy, reg, data));
214 miibus_statchg(device_t dev)
218 parent = device_get_parent(dev);
219 MIIBUS_STATCHG(parent);
224 miibus_mediainit(device_t dev)
226 struct mii_data *mii;
227 struct ifmedia_entry *m;
230 /* Poke the parent in case it has any media of its own to add. */
231 MIIBUS_MEDIAINIT(device_get_parent(dev));
233 mii = device_get_softc(dev);
234 for (m = LIST_FIRST(&mii->mii_media.ifm_list); m != NULL;
235 m = LIST_NEXT(m, ifm_list)) {
236 media = m->ifm_media;
237 if (media == (IFM_ETHER|IFM_AUTO))
241 ifmedia_set(&mii->mii_media, media);
247 mii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd,
248 ifm_stat_cb_t ifmedia_sts)
253 v = kmalloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_INTWAIT);
256 *child = device_add_child(dev, "miibus", -1);
257 device_set_ivars(*child, v);
259 for (i = 0; i < MII_NPHY; i++) {
260 if (!miibus_no_phy(dev, i))
265 device_delete_child(dev, *child);
270 bus_generic_attach(dev);
276 * Media changed; notify all PHYs.
279 mii_mediachg(struct mii_data *mii)
281 struct mii_softc *child;
284 mii->mii_media_status = 0;
285 mii->mii_media_active = IFM_NONE;
287 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
288 child = LIST_NEXT(child, mii_list)) {
289 rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
293 /* Reset autonegotiation timer. */
294 child->mii_ticks = 0;
301 * Call the PHY tick routines, used during autonegotiation.
304 mii_tick(struct mii_data *mii)
306 struct mii_softc *child;
308 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
309 child = LIST_NEXT(child, mii_list))
310 (*child->mii_service)(child, mii, MII_TICK);
314 * Get media status from PHYs.
317 mii_pollstat(struct mii_data *mii)
319 struct mii_softc *child;
321 mii->mii_media_status = 0;
322 mii->mii_media_active = IFM_NONE;
324 for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
325 child = LIST_NEXT(child, mii_list))
326 (*child->mii_service)(child, mii, MII_POLLSTAT);
329 static moduledata_t miibus_mod = { "miibus" };
331 DECLARE_MODULE(miibus, miibus_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);