1 /* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */
4 * Copyright (c) 1998, 1999 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.
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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 THE
30 * POSSIBILITY OF SUCH DAMAGE.
34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
61 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
62 * Data Sheet available from www.national.com
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/kernel.h>
68 #include <sys/socket.h>
69 #include <sys/errno.h>
70 #include <sys/module.h>
74 #include <net/if_media.h>
76 #include <dev/mii/mii.h>
77 #include <dev/mii/miivar.h>
80 #include <dev/mii/nsphyreg.h>
82 #include "miibus_if.h"
84 static int nsphy_probe(device_t);
85 static int nsphy_attach(device_t);
87 static device_method_t nsphy_methods[] = {
88 /* device interface */
89 DEVMETHOD(device_probe, nsphy_probe),
90 DEVMETHOD(device_attach, nsphy_attach),
91 DEVMETHOD(device_detach, mii_phy_detach),
92 DEVMETHOD(device_shutdown, bus_generic_shutdown),
96 static devclass_t nsphy_devclass;
98 static driver_t nsphy_driver = {
101 sizeof(struct mii_softc)
104 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
106 static int nsphy_service(struct mii_softc *, struct mii_data *, int);
107 static void nsphy_status(struct mii_softc *);
108 static void nsphy_reset(struct mii_softc *);
110 static const struct mii_phydesc nsphys[] = {
111 MII_PHY_DESC(NATSEMI, DP83840),
116 nsphy_probe(device_t dev)
119 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT));
123 nsphy_attach(device_t dev)
125 struct mii_softc *sc;
126 struct mii_attach_args *ma;
127 struct mii_data *mii;
130 sc = device_get_softc(dev);
131 ma = device_get_ivars(dev);
132 sc->mii_dev = device_get_parent(dev);
134 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
136 sc->mii_flags = miibus_get_flags(dev);
137 sc->mii_inst = mii->mii_instance++;
138 sc->mii_phy = ma->mii_phyno;
139 sc->mii_service = nsphy_service;
142 nic = device_get_name(device_get_parent(sc->mii_dev));
144 * Am79C971 wedge when isolating all of their external PHYs.
146 if (strcmp(nic, "pcn") == 0)
147 sc->mii_flags |= MIIF_NOISOLATE;
151 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
154 * XXX IFM_LOOP should be handled by mii_phy_add_media() based
157 if ((sc->mii_flags & MIIF_NOLOOP) == 0)
158 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
159 sc->mii_inst), MII_MEDIA_100_TX);
165 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
166 device_printf(dev, " ");
167 mii_phy_add_media(sc);
170 MIIBUS_MEDIAINIT(sc->mii_dev);
175 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
185 * If the interface is not up, don't do anything.
187 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
190 reg = PHY_READ(sc, MII_NSPHY_PCR);
193 * Set up the PCR to use LED4 to indicate full-duplex
194 * in both 10baseT and 100baseTX modes.
199 * Make sure Carrier Integrity Monitor function is
200 * disabled (normal for Node operation, but sometimes
206 * Make sure "force link good" is set to normal mode.
207 * It's only intended for debugging.
212 * Mystery bits which are supposedly `reserved',
213 * but we seem to need to set them when the PHY
214 * is connected to some interfaces:
216 * 0x0400 is needed for fxp
217 * (Intel EtherExpress Pro 10+/100B, 82557 chip)
218 * (nsphy with a DP83840 chip)
219 * 0x0100 may be needed for some other card
221 reg |= 0x0100 | 0x0400;
223 if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0)
224 PHY_WRITE(sc, MII_NSPHY_PCR, reg);
226 mii_phy_setmedia(sc);
230 if (mii_phy_tick(sc) == EJUSTRETURN)
235 /* Update the media status. */
238 /* Callback if something changed. */
239 mii_phy_update(sc, cmd);
244 nsphy_status(struct mii_softc *sc)
246 struct mii_data *mii = sc->mii_pdata;
247 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
248 int bmsr, bmcr, par, anlpar;
250 mii->mii_media_status = IFM_AVALID;
251 mii->mii_media_active = IFM_ETHER;
253 bmsr = PHY_READ(sc, MII_BMSR) |
254 PHY_READ(sc, MII_BMSR);
255 if (bmsr & BMSR_LINK)
256 mii->mii_media_status |= IFM_ACTIVE;
258 bmcr = PHY_READ(sc, MII_BMCR);
259 if (bmcr & BMCR_ISO) {
260 mii->mii_media_active |= IFM_NONE;
261 mii->mii_media_status = 0;
265 if (bmcr & BMCR_LOOP)
266 mii->mii_media_active |= IFM_LOOP;
268 if (bmcr & BMCR_AUTOEN) {
270 * The PAR status bits are only valid if autonegotiation
271 * has completed (or it's disabled).
273 if ((bmsr & BMSR_ACOMP) == 0) {
274 /* Erg, still trying, I guess... */
275 mii->mii_media_active |= IFM_NONE;
280 * Argh. The PAR doesn't seem to indicate duplex mode
281 * properly! Determine media based on link partner's
282 * advertised capabilities.
284 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
285 anlpar = PHY_READ(sc, MII_ANAR) &
286 PHY_READ(sc, MII_ANLPAR);
287 if (anlpar & ANLPAR_TX_FD)
288 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
289 else if (anlpar & ANLPAR_T4)
290 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
291 else if (anlpar & ANLPAR_TX)
292 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
293 else if (anlpar & ANLPAR_10_FD)
294 mii->mii_media_active |= IFM_10_T|IFM_FDX;
295 else if (anlpar & ANLPAR_10)
296 mii->mii_media_active |= IFM_10_T|IFM_HDX;
298 mii->mii_media_active |= IFM_NONE;
303 * Link partner is not capable of autonegotiation.
304 * We will never be in full-duplex mode if this is
305 * the case, so reading the PAR is OK.
307 par = PHY_READ(sc, MII_NSPHY_PAR);
309 mii->mii_media_active |= IFM_10_T;
311 mii->mii_media_active |= IFM_100_TX;
312 mii->mii_media_active |= IFM_HDX;
314 mii->mii_media_active = ife->ifm_media;
318 nsphy_reset(struct mii_softc *sc)
320 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
323 if (sc->mii_flags & MIIF_NOISOLATE)
326 reg = BMCR_RESET | BMCR_ISO;
327 PHY_WRITE(sc, MII_BMCR, reg);
330 * It is best to allow a little time for the reset to settle
331 * in before we start polling the BMCR again. Notably, the
332 * DP83840A manuals state that there should be a 500us delay
333 * between asserting software reset and attempting MII serial
334 * operations. Be conservative.
339 * Wait another 2s for it to complete.
340 * This is only a little overkill as under normal circumstances
341 * the PHY can take up to 1s to complete reset.
342 * This is also a bit odd because after a reset, the BMCR will
343 * clear the reset bit and simply reports 0 even though the reset
344 * is not yet complete.
346 for (i = 0; i < 1000; i++) {
347 reg = PHY_READ(sc, MII_BMCR);
348 if (reg != 0 && (reg & BMCR_RESET) == 0)
353 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) {
354 if ((ife == NULL && sc->mii_inst != 0) ||
355 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))
356 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);