1 /* $OpenBSD: amphy.c,v 1.13 2005/05/27 08:04:15 brad Exp $ */
4 * Copyright (c) 1997, 1998, 1999
5 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
34 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.2.2.2 2002/11/08 21:53:49 semenu Exp $
38 * driver for AMD AM79c873 PHYs
39 * This driver also works for the Davicom DM9101 PHY, which appears to
40 * be an AM79c873 workalike.
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/socket.h>
50 #include <net/if_var.h>
51 #include <net/if_media.h>
59 #include "miibus_if.h"
61 static int amphy_probe (device_t);
62 static int amphy_attach (device_t);
64 static device_method_t amphy_methods[] = {
65 /* device interface */
66 DEVMETHOD(device_probe, amphy_probe),
67 DEVMETHOD(device_attach, amphy_attach),
68 DEVMETHOD(device_detach, ukphy_detach),
69 DEVMETHOD(device_shutdown, bus_generic_shutdown),
73 static const struct mii_phydesc amphys[] = {
74 MII_PHYDESC(xxAMD, 79C873),
75 MII_PHYDESC(xxDAVICOM, DM9101),
76 MII_PHYDESC(DAVICOM, DM9102),
77 MII_PHYDESC(DAVICOM, DM9601),
81 static devclass_t amphy_devclass;
83 static driver_t amphy_driver = {
86 sizeof(struct mii_softc)
89 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, NULL, NULL);
91 static int amphy_service(struct mii_softc *, struct mii_data *, int);
92 static void amphy_status(struct mii_softc *);
95 amphy_probe(device_t dev)
97 struct mii_attach_args *ma = device_get_ivars(dev);
98 const struct mii_phydesc *mpd;
100 mpd = mii_phy_match(ma, amphys);
102 device_set_desc(dev, mpd->mpd_name);
109 amphy_attach(device_t dev)
111 struct mii_softc *sc;
112 struct mii_attach_args *ma;
113 struct mii_data *mii;
115 sc = device_get_softc(dev);
116 ma = device_get_ivars(dev);
117 mii_softc_init(sc, ma);
118 sc->mii_dev = device_get_parent(dev);
119 mii = device_get_softc(sc->mii_dev);
120 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
122 sc->mii_inst = mii->mii_instance;
123 sc->mii_service = amphy_service;
126 sc->mii_flags |= MIIF_NOISOLATE;
129 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
131 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
140 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
141 device_printf(dev, " ");
142 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
143 kprintf("no media present");
145 mii_phy_add_media(sc);
148 MIIBUS_MEDIAINIT(sc->mii_dev);
153 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
161 * If we're not polling our PHY instance, just return.
163 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
169 * If the media indicates a different PHY instance,
172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
173 reg = PHY_READ(sc, MII_BMCR);
174 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
179 * If the interface is not up, don't do anything.
181 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
184 mii_phy_set_media(sc);
189 * If we're not currently selected, just return.
191 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
194 if (mii_phy_tick(sc) == EJUSTRETURN)
199 /* Update the media status. */
202 /* Callback if something changed. */
203 mii_phy_update(sc, cmd);
208 amphy_status(struct mii_softc *sc)
210 struct mii_data *mii = sc->mii_pdata;
211 int bmsr, bmcr, par, anlpar;
213 mii->mii_media_status = IFM_AVALID;
214 mii->mii_media_active = IFM_ETHER;
216 bmsr = PHY_READ(sc, MII_BMSR) |
217 PHY_READ(sc, MII_BMSR);
218 if (bmsr & BMSR_LINK)
219 mii->mii_media_status |= IFM_ACTIVE;
221 bmcr = PHY_READ(sc, MII_BMCR);
222 if (bmcr & BMCR_ISO) {
223 mii->mii_media_active |= IFM_NONE;
224 mii->mii_media_status = 0;
228 if (bmcr & BMCR_LOOP)
229 mii->mii_media_active |= IFM_LOOP;
231 if (bmcr & BMCR_AUTOEN) {
233 * The PAR status bits are only valid of autonegotiation
234 * has completed (or it's disabled).
236 if ((bmsr & BMSR_ACOMP) == 0) {
237 /* Erg, still trying, I guess... */
238 mii->mii_media_active |= IFM_NONE;
242 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
243 anlpar = PHY_READ(sc, MII_ANAR) &
244 PHY_READ(sc, MII_ANLPAR);
245 if (anlpar & ANLPAR_T4)
246 mii->mii_media_active |= IFM_100_T4;
247 else if (anlpar & ANLPAR_TX_FD)
248 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
249 else if (anlpar & ANLPAR_TX)
250 mii->mii_media_active |= IFM_100_TX;
251 else if (anlpar & ANLPAR_10_FD)
252 mii->mii_media_active |= IFM_10_T|IFM_FDX;
253 else if (anlpar & ANLPAR_10)
254 mii->mii_media_active |= IFM_10_T;
256 mii->mii_media_active |= IFM_NONE;
261 * Link partner is not capable of autonegotiation.
263 par = PHY_READ(sc, MII_AMPHY_DSCSR);
264 if (par & DSCSR_100FDX)
265 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
266 else if (par & DSCSR_100HDX)
267 mii->mii_media_active |= IFM_100_TX;
268 else if (par & DSCSR_10FDX)
269 mii->mii_media_active |= IFM_10_T|IFM_HDX;
270 else if (par & DSCSR_10HDX)
271 mii->mii_media_active |= IFM_10_T;
273 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;