/*-
* Copyright (c) 1998, 1999, 2000, 2001 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.
*
* 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.
*
* 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.
*/
/* Setup autonegotiation and start it. */
int
mii_phy_auto(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
KASSERT(mii_locked(mii));
sc->mii_ticks = 0;
if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
/*
* Check for 1000BASE-X. Autonegotiation is a bit
* different on such devices.
*/
if (sc->mii_flags & MIIF_IS_1000X) {
uint16_t anar = 0;
if (sc->mii_extcapabilities & EXTSR_1000XFDX)
anar |= ANAR_X_FD;
if (sc->mii_extcapabilities & EXTSR_1000XHDX)
anar |= ANAR_X_HD;
if (sc->mii_flags & MIIF_DOPAUSE) {
/* XXX Asymmetric vs. symmetric? */
anar |= ANLPAR_X_PAUSE_TOWARDS;
}
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) |
ANAR_CSMA;
if (sc->mii_flags & MIIF_DOPAUSE) {
anar |= ANAR_FC;
/* XXX Only 1000BASE-T has PAUSE_ASYM? */
if ((sc->mii_flags & MIIF_HAVE_GTCR) &&
(sc->mii_extcapabilities &
(EXTSR_1000THDX | EXTSR_1000TFDX)))
anar |= ANAR_PAUSE_ASYM;
}
/*
* For 1000-base-T, autonegotiation must be enabled,
* but if we're not set to auto, only advertise
* 1000-base-T with the link partner.
*/
if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
anar &= ~(ANAR_T4 | ANAR_TX_FD | ANAR_TX |
ANAR_10_FD | ANAR_10);
}
/*
* Just let it finish asynchronously. This is for the benefit of
* the tick handler driving autonegotiation. Don't want 500ms
* delays all the time while the system is running!
*/
if (sc->mii_flags & MIIF_AUTOTSLEEP) {
ASSERT_SLEEPABLE();
sc->mii_flags |= MIIF_DOINGAUTO;
kpause("miiaut", false, hz >> 1, mii->mii_media.ifm_lock);
mii_phy_auto_timeout_locked(sc);
KASSERT((sc->mii_flags & MIIF_DOINGAUTO) == 0);
cv_broadcast(&sc->mii_nway_cv);
} else if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
sc->mii_flags |= MIIF_DOINGAUTO;
callout_reset(&sc->mii_nway_ch, hz >> 1,
mii_phy_auto_timeout, sc);
}
return EJUSTRETURN;
}
/* Just restart autonegotiation without changing any setting */
int
mii_phy_auto_restart(struct mii_softc *sc)
{
uint16_t reg;
/* Just bail now if the interface is down. */
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return EJUSTRETURN;
/*
* If we're not doing autonegotiation, we don't need to do any extra
* work here. However, we need to check the link status so we can
* generate an announcement by returning with 0 if the status changes.
*/
if ((IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) &&
(IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)) {
/*
* Reset autonegotiation timer to 0 just to make sure
* the future autonegotiation start with 0.
*/
sc->mii_ticks = 0;
return 0;
}
/* Read the status register twice; BMSR_LINK is latch-low. */
PHY_READ(sc, MII_BMSR, ®);
PHY_READ(sc, MII_BMSR, ®);
if (reg & BMSR_LINK) {
/*
* Reset autonegotiation timer to 0 in case the link
* goes down in the next tick.
*/
sc->mii_ticks = 0;
/* See above. */
return 0;
}
/*
* mii_ticks == 0 means it's the first tick after changing the media or
* the link became down since the last tick (see above), so return with
* 0 to update the status.
*/
if (sc->mii_ticks++ == 0)
return 0;
/*
* Only retry autonegotiation every N seconds.
*/
KASSERT(sc->mii_anegticks != 0);
if (sc->mii_ticks < sc->mii_anegticks)
return EJUSTRETURN;
if (mii_phy_auto_restart(sc) == EJUSTRETURN)
return EJUSTRETURN;
/*
* Might need to generate a status message if autonegotiation
* failed.
*/
return 0;
}
void
mii_phy_reset(struct mii_softc *sc)
{
int i;
uint16_t reg;
/* Wait another 500ms for it to complete. */
for (i = 0; i < 500; i++) {
PHY_READ(sc, MII_BMCR, ®);
if ((reg & BMCR_RESET) == 0)
break;
delay(1000);
}
if (sc->mii_flags & MIIF_AUTOTSLEEP) {
while (sc->mii_flags & MIIF_DOINGAUTO) {
cv_wait(&sc->mii_nway_cv,
sc->mii_pdata->mii_media.ifm_lock);
}
} else {
if ((sc->mii_flags & MIIF_DOINGAUTO) != 0 &&
callout_halt(&sc->mii_nway_ch,
sc->mii_pdata->mii_media.ifm_lock) == 0) {
/*
* The callout was scheduled, and we prevented
* it from running before it expired, so we are
* now responsible for clearing the flag.
*/
sc->mii_flags &= ~MIIF_DOINGAUTO;
}
}
KASSERT((sc->mii_flags & MIIF_DOINGAUTO) == 0);
}
/*
* Initialize generic PHY media based on BMSR, called when a PHY is
* attached. We expect to be set up to print a comma-separated list
* of media names. Does not print a newline.
*/
void
mii_phy_add_media(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
device_t self = sc->mii_dev;
const char *sep = "";
int fdx = 0;
/*
* Set the autonegotiation timer for 10/100 media. Gigabit media is
* handled below.
*/
mii_lock(mii);
sc->mii_anegticks = MII_ANEGTICKS;
mii_unlock(mii);
/* This flag is static; no need to lock. */
if ((sc->mii_flags & MIIF_NOISOLATE) == 0)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
MII_MEDIA_NONE);
/*
* There are different interpretations for the bits in
* HomePNA PHYs. And there is really only one media type
* that is supported. This flag is also static, and so
* no need to lock.
*/
if (sc->mii_flags & MIIF_IS_HPNA) {
if (sc->mii_capabilities & BMSR_10THDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0,
sc->mii_inst),
MII_MEDIA_10_T);
PRINT("HomePNA1");
}
goto out;
}
if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) {
/*
* XXX Right now only handle 1000SX and 1000TX. Need
* XXX to handle 1000LX and 1000CX some how.
*
* Note since it can take 5 seconds to auto-negotiate
* a gigabit link, we make anegticks 10 seconds for
* all the gigabit media types.
*/
if (sc->mii_extcapabilities & EXTSR_1000XHDX) {
mii_lock(mii);
sc->mii_anegticks = MII_ANEGTICKS_GIGE;
sc->mii_flags |= MIIF_IS_1000X;
mii_unlock(mii);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0,
sc->mii_inst), MII_MEDIA_1000_X);
PRINT("1000baseSX");
}
if (sc->mii_extcapabilities & EXTSR_1000XFDX) {
mii_lock(mii);
sc->mii_anegticks = MII_ANEGTICKS_GIGE;
sc->mii_flags |= MIIF_IS_1000X;
mii_unlock(mii);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX,
sc->mii_inst), MII_MEDIA_1000_X_FDX);
PRINT("1000baseSX-FDX");
fdx = 1;
}
/*
* 1000baseT media needs to be able to manipulate
* master/slave mode. We set IFM_ETH_MASTER in
* the "don't care mask" and filter it out when
* the media is set.
*
* All 1000baseT PHYs have a 1000baseT control register.
*/
if (sc->mii_extcapabilities & EXTSR_1000THDX) {
mii_lock(mii);
sc->mii_anegticks = MII_ANEGTICKS_GIGE;
sc->mii_flags |= MIIF_HAVE_GTCR;
mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
mii_unlock(mii);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0,
sc->mii_inst), MII_MEDIA_1000_T);
PRINT("1000baseT");
}
if (sc->mii_extcapabilities & EXTSR_1000TFDX) {
mii_lock(mii);
sc->mii_anegticks = MII_ANEGTICKS_GIGE;
sc->mii_flags |= MIIF_HAVE_GTCR;
mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
mii_unlock(mii);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX,
sc->mii_inst), MII_MEDIA_1000_T_FDX);
PRINT("1000baseT-FDX");
fdx = 1;
}
}
if (sc->mii_capabilities & BMSR_ANEG) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
MII_NMEDIA); /* intentionally invalid index */
PRINT("auto");
}
#undef ADD
#undef PRINT
/* This flag is static; no need to lock. */
if (fdx != 0 && (sc->mii_flags & MIIF_DOPAUSE)) {
mii_lock(mii);
mii->mii_media.ifm_mask |= IFM_ETH_FMASK;
mii_unlock(mii);
}
out:
aprint_normal("\n");
if (!pmf_device_register(self, NULL, mii_phy_resume)) {
aprint_error_dev(self, "couldn't establish power handler\n");
}
}