NetBSD/sys/dev/mii/exphy.c

364 lines
10 KiB
C

/* $NetBSD: exphy.c,v 1.5 1998/08/28 12:50:36 fvdl Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center, and by Frank van der Linden.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1997 Manuel Bouyer. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* driver for 3Com internal PHYs
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
struct exphy_softc {
struct mii_softc sc_mii; /* generic PHY */
int sc_capabilities;
int sc_active;
};
int exphymatch __P((struct device *, struct cfdata *, void *));
void exphyattach __P((struct device *, struct device *, void *));
struct cfattach exphy_ca = {
sizeof(struct exphy_softc), exphymatch, exphyattach
};
#define EXPHY_READ(sc, reg) \
(*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \
(sc)->sc_mii.mii_phy, (reg))
#define EXPHY_WRITE(sc, reg, val) \
(*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \
(sc)->sc_mii.mii_phy, (reg), (val))
int exphy_service __P((struct mii_softc *, struct mii_data *, int));
void exphy_reset __P((struct exphy_softc *));
void exphy_auto __P((struct exphy_softc *));
void exphy_status __P((struct exphy_softc *));
int
exphymatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct mii_attach_args *ma = aux;
/*
* Argh, 3Com PHY reports oui == 0 model == 0!
*/
if (MII_OUI(ma->mii_id1, ma->mii_id2) == 0 &&
MII_MODEL(ma->mii_id2) == 0)
return (1);
return (0);
}
void
exphyattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct exphy_softc *sc = (struct exphy_softc *)self;
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
printf(": 3Com internal media interface, rev. %d\n",
MII_REV(ma->mii_id2));
sc->sc_mii.mii_inst = mii->mii_instance;
sc->sc_mii.mii_phy = ma->mii_phyno;
sc->sc_mii.mii_service = exphy_service;
sc->sc_mii.mii_pdata = mii;
/*
* The 3Com PHY can never be isolated, so never allow non-zero
* instances!
*/
if (mii->mii_instance != 0) {
printf("%s: ignoring this PHY, non-zero instance\n",
sc->sc_mii.mii_dev.dv_xname);
return;
}
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
BMCR_ISO);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
BMCR_LOOP|BMCR_S100);
exphy_reset(sc);
sc->sc_capabilities = EXPHY_READ(sc, MII_BMSR) & ma->mii_capmask;
printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0)
printf("no media present");
else
mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst);
printf("\n");
#undef ADD
}
int
exphy_service(self, mii, cmd)
struct mii_softc *self;
struct mii_data *mii;
int cmd;
{
struct exphy_softc *sc = (struct exphy_softc *)self;
/*
* We can't isolate the 3Com PHY, so it has to be the only one!
*/
if (IFM_INST(mii->mii_media.ifm_media) != sc->sc_mii.mii_inst)
panic("exphy_service: can't isolate 3Com PHY");
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
switch (IFM_SUBTYPE(mii->mii_media.ifm_media)) {
case IFM_AUTO:
/*
* If we're already in auto mode, just return.
*/
if (EXPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
return (0);
exphy_auto(sc);
break;
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
default:
/*
* BMCR data is stored in the ifmedia entry.
*/
EXPHY_WRITE(sc, MII_ANAR,
mii_anar(mii->mii_media.ifm_media));
EXPHY_WRITE(sc, MII_BMCR,
mii->mii_media.ifm_cur->ifm_data);
}
break;
case MII_TICK:
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(mii->mii_media.ifm_media) != IFM_AUTO)
return (0);
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* The 3Com PHY's autonegotiation doesn't need to be
* kicked; it continues in the background.
*/
break;
}
/* Update the media status. */
exphy_status(sc);
/* Callback if something changed. */
if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
(*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
sc->sc_active = mii->mii_media_active;
}
return (0);
}
void
exphy_status(sc)
struct exphy_softc *sc;
{
struct mii_data *mii = sc->sc_mii.mii_pdata;
int bmsr, bmcr, anlpar;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = EXPHY_READ(sc, MII_BMSR) | EXPHY_READ(sc, MII_BMSR);
if (bmsr & BMSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = EXPHY_READ(sc, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & BMCR_AUTOEN) {
/*
* The 3Com PHY uses the highest-order common bit of
* the ANAR and ANLPAR (i.e. best media advertised
* both by us and our link partner).
*/
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
anlpar = EXPHY_READ(sc, MII_ANAR) & EXPHY_READ(sc, MII_ANLPAR);
if (anlpar & ANLPAR_T4)
mii->mii_media_active |= IFM_100_T4;
else if (anlpar & ANLPAR_TX_FD)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_TX)
mii->mii_media_active |= IFM_100_TX;
else if (anlpar & ANLPAR_10_FD)
mii->mii_media_active |= IFM_10_T|IFM_FDX;
else if (anlpar & ANLPAR_10)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_NONE;
} else {
if (bmcr & BMCR_S100)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (bmcr & BMCR_FDX)
mii->mii_media_active |= IFM_FDX;
}
}
void
exphy_auto(sc)
struct exphy_softc *sc;
{
int bmsr, i;
EXPHY_WRITE(sc, MII_ANAR,
BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA);
EXPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((bmsr = EXPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP)
return;
delay(1000);
}
#if 0
if ((bmsr & BMSR_ACOMP) == 0)
printf("%s: autonegotiation failed to complete\n",
sc->sc_mii.mii_dev.dv_xname);
#endif
}
void
exphy_reset(sc)
struct exphy_softc *sc;
{
int reg, i;
EXPHY_WRITE(sc, MII_BMCR, BMCR_RESET);
/* Wait 100ms for it to complete. */
for (i = 0; i < 100; i++) {
reg = EXPHY_READ(sc, MII_BMCR);
if ((reg & BMCR_RESET) == 0)
break;
delay(1000);
}
/*
* XXX 3Com PHY doesn't set the BMCR properly after
* XXX reset, which breaks autonegotiation.
*/
EXPHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
}