2 * Copyright (c) 1997, 1998, 1999
3 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
32 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.2.2.2 2002/11/08 21:53:49 semenu Exp $
33 * $DragonFly: src/sys/dev/netif/mii_layer/amphy.c,v 1.9 2005/12/11 01:54:08 swildner Exp $
37 * driver for AMD AM79c873 PHYs
38 * This driver also works for the Davicom DM9101 PHY, which appears to
39 * be an AM79c873 workalike.
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/socket.h>
49 #include <net/if_media.h>
57 #include "miibus_if.h"
59 static int amphy_probe (device_t);
60 static int amphy_attach (device_t);
61 static int amphy_detach (device_t);
63 static device_method_t amphy_methods[] = {
64 /* device interface */
65 DEVMETHOD(device_probe, amphy_probe),
66 DEVMETHOD(device_attach, amphy_attach),
67 DEVMETHOD(device_detach, amphy_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
72 static devclass_t amphy_devclass;
74 static driver_t amphy_driver = {
77 sizeof(struct mii_softc)
80 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
82 int amphy_service (struct mii_softc *, struct mii_data *, int);
83 void amphy_status (struct mii_softc *);
86 amphy_probe(device_t dev)
88 struct mii_attach_args *ma;
90 ma = device_get_ivars(dev);
92 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD ||
93 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) &&
94 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM ||
95 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101))
98 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD)
99 device_set_desc(dev, MII_STR_xxAMD_79C873);
100 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM)
101 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101);
107 amphy_attach(device_t dev)
109 struct mii_softc *sc;
110 struct mii_attach_args *ma;
111 struct mii_data *mii;
113 sc = device_get_softc(dev);
114 ma = device_get_ivars(dev);
115 mii_softc_init(sc, ma);
116 sc->mii_dev = device_get_parent(dev);
117 mii = device_get_softc(sc->mii_dev);
118 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
120 sc->mii_inst = mii->mii_instance;
121 sc->mii_service = amphy_service;
124 sc->mii_flags |= MIIF_NOISOLATE;
127 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
129 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
132 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
133 BMCR_LOOP|BMCR_S100);
138 sc->mii_capabilities =
139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
140 device_printf(dev, " ");
141 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
142 printf("no media present");
144 mii_add_media(sc, sc->mii_capabilities);
147 MIIBUS_MEDIAINIT(sc->mii_dev);
152 amphy_detach(device_t dev)
154 struct mii_softc *sc;
155 struct mii_data *mii;
157 sc = device_get_softc(dev);
158 mii = device_get_softc(device_get_parent(dev));
159 mii_phy_auto_stop(sc);
161 LIST_REMOVE(sc, mii_list);
167 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
175 * If we're not polling our PHY instance, just return.
177 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
183 * If the media indicates a different PHY instance,
186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
187 reg = PHY_READ(sc, MII_BMCR);
188 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
193 * If the interface is not up, don't do anything.
195 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
198 switch (IFM_SUBTYPE(ife->ifm_media)) {
201 * If we're already in auto mode, just return.
203 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
205 (void) mii_phy_auto(sc, 1);
209 * XXX Not supported as a manual setting right now.
214 * BMCR data is stored in the ifmedia entry.
216 PHY_WRITE(sc, MII_ANAR,
217 mii_anar(ife->ifm_media));
218 PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
224 * If we're not currently selected, just return.
226 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
230 * Only used for autonegotiation.
232 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
236 * Is the interface even up?
238 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
242 * Only retry autonegotiation every 5 seconds.
244 if (++sc->mii_ticks != 5)
250 * Check to see if we have link. If we do, we don't
251 * need to restart the autonegotiation process. Read
252 * the BMSR twice in case it's latched.
254 reg = PHY_READ(sc, MII_BMSR) |
255 PHY_READ(sc, MII_BMSR);
260 if (mii_phy_auto(sc, 0) == EJUSTRETURN)
265 /* Update the media status. */
268 /* Callback if something changed. */
269 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
270 MIIBUS_STATCHG(sc->mii_dev);
271 sc->mii_active = mii->mii_media_active;
277 amphy_status(struct mii_softc *sc)
279 struct mii_data *mii = sc->mii_pdata;
280 int bmsr, bmcr, par, anlpar;
282 mii->mii_media_status = IFM_AVALID;
283 mii->mii_media_active = IFM_ETHER;
285 bmsr = PHY_READ(sc, MII_BMSR) |
286 PHY_READ(sc, MII_BMSR);
287 if (bmsr & BMSR_LINK)
288 mii->mii_media_status |= IFM_ACTIVE;
290 bmcr = PHY_READ(sc, MII_BMCR);
291 if (bmcr & BMCR_ISO) {
292 mii->mii_media_active |= IFM_NONE;
293 mii->mii_media_status = 0;
297 if (bmcr & BMCR_LOOP)
298 mii->mii_media_active |= IFM_LOOP;
300 if (bmcr & BMCR_AUTOEN) {
302 * The PAR status bits are only valid of autonegotiation
303 * has completed (or it's disabled).
305 if ((bmsr & BMSR_ACOMP) == 0) {
306 /* Erg, still trying, I guess... */
307 mii->mii_media_active |= IFM_NONE;
311 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
312 anlpar = PHY_READ(sc, MII_ANAR) &
313 PHY_READ(sc, MII_ANLPAR);
314 if (anlpar & ANLPAR_T4)
315 mii->mii_media_active |= IFM_100_T4;
316 else if (anlpar & ANLPAR_TX_FD)
317 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
318 else if (anlpar & ANLPAR_TX)
319 mii->mii_media_active |= IFM_100_TX;
320 else if (anlpar & ANLPAR_10_FD)
321 mii->mii_media_active |= IFM_10_T|IFM_FDX;
322 else if (anlpar & ANLPAR_10)
323 mii->mii_media_active |= IFM_10_T;
325 mii->mii_media_active |= IFM_NONE;
330 * Link partner is not capable of autonegotiation.
332 par = PHY_READ(sc, MII_AMPHY_DSCSR);
333 if (par & DSCSR_100FDX)
334 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
335 else if (par & DSCSR_100HDX)
336 mii->mii_media_active |= IFM_100_TX;
337 else if (par & DSCSR_10FDX)
338 mii->mii_media_active |= IFM_10_T|IFM_HDX;
339 else if (par & DSCSR_10HDX)
340 mii->mii_media_active |= IFM_10_T;
342 mii->mii_media_active = mii_media_from_bmcr(bmcr);