freebsd-dev/sys/dev/mii/atphy.c
2011-11-23 20:27:26 +00:00

378 lines
9.2 KiB
C

/*-
* Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org>
* 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 unmodified, 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Driver for the Attansic/Atheros F1 10/100/1000 PHY.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/atphyreg.h>
#include "miibus_if.h"
static int atphy_probe(device_t);
static int atphy_attach(device_t);
static device_method_t atphy_methods[] = {
/* Device interface. */
DEVMETHOD(device_probe, atphy_probe),
DEVMETHOD(device_attach, atphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t atphy_devclass;
static driver_t atphy_driver = {
"atphy",
atphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(atphy, miibus, atphy_driver, atphy_devclass, 0, 0);
static int atphy_service(struct mii_softc *, struct mii_data *, int);
static void atphy_status(struct mii_softc *);
static void atphy_reset(struct mii_softc *);
static uint16_t atphy_anar(struct ifmedia_entry *);
static int atphy_setmedia(struct mii_softc *, int);
static const struct mii_phydesc atphys[] = {
MII_PHY_DESC(xxATHEROS, F1),
MII_PHY_DESC(xxATHEROS, F1_7),
MII_PHY_DESC(xxATHEROS, F2),
MII_PHY_END
};
static const struct mii_phy_funcs atphy_funcs = {
atphy_service,
atphy_status,
atphy_reset
};
static int
atphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, atphys, BUS_PROBE_DEFAULT));
}
static int
atphy_attach(device_t dev)
{
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &atphy_funcs, 1);
return (0);
}
static int
atphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint16_t anar, bmcr, bmsr;
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;
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO ||
IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
atphy_setmedia(sc, ife->ifm_media);
break;
}
bmcr = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_100_TX:
bmcr = BMCR_S100;
break;
case IFM_10_T:
bmcr = BMCR_S10;
break;
case IFM_NONE:
bmcr = PHY_READ(sc, MII_BMCR);
/*
* XXX
* Due to an unknown reason powering down PHY resulted
* in unexpected results such as inaccessibility of
* hardware of freshly rebooted system. Disable
* powering down PHY until I got more information for
* Attansic/Atheros PHY hardwares.
*/
PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO);
goto done;
default:
return (EINVAL);
}
anar = atphy_anar(ife);
if ((ife->ifm_media & IFM_FDX) != 0) {
bmcr |= BMCR_FDX;
if ((ife->ifm_media & IFM_FLOW) != 0 ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |= ANAR_PAUSE_TOWARDS;
}
if ((sc->mii_extcapabilities & (EXTSR_1000TFDX |
EXTSR_1000THDX)) != 0)
PHY_WRITE(sc, MII_100T2CR, 0);
PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA);
/*
* Reset the PHY so all changes take effect.
*/
PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_RESET | BMCR_AUTOEN |
BMCR_STARTNEG);
done:
break;
case MII_TICK:
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
sc->mii_ticks = 0;
break;
}
/*
* Check for link.
* Read the status register twice; BMSR_LINK is latch-low.
*/
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (bmsr & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
/* Announce link loss right after it happens. */
if (sc->mii_ticks++ == 0)
break;
if (sc->mii_ticks <= sc->mii_anegticks)
return (0);
sc->mii_ticks = 0;
atphy_setmedia(sc, ife->ifm_media);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
atphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
uint32_t bmsr, bmcr, ssr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if ((bmsr & BMSR_LINK) != 0)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if ((bmcr & BMCR_ISO) != 0) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if ((bmcr & BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
ssr = PHY_READ(sc, ATPHY_SSR);
if ((ssr & ATPHY_SSR_SPD_DPLX_RESOLVED) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
switch (ssr & ATPHY_SSR_SPEED_MASK) {
case ATPHY_SSR_1000MBS:
mii->mii_media_active |= IFM_1000_T;
/*
* atphy(4) has a valid link so reset mii_ticks.
* Resetting mii_ticks is needed in order to
* detect link loss after auto-negotiation.
*/
sc->mii_ticks = 0;
break;
case ATPHY_SSR_100MBS:
mii->mii_media_active |= IFM_100_TX;
sc->mii_ticks = 0;
break;
case ATPHY_SSR_10MBS:
mii->mii_media_active |= IFM_10_T;
sc->mii_ticks = 0;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
if ((ssr & ATPHY_SSR_DUPLEX) != 0)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
(PHY_READ(sc, MII_100T2SR) & GTSR_MS_RES) != 0)
mii->mii_media_active |= IFM_ETH_MASTER;
}
static void
atphy_reset(struct mii_softc *sc)
{
struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
uint32_t reg;
int i;
/* Take PHY out of power down mode. */
PHY_WRITE(sc, 29, 0x29);
PHY_WRITE(sc, 30, 0);
reg = PHY_READ(sc, ATPHY_SCR);
/* Enable automatic crossover. */
reg |= ATPHY_SCR_AUTO_X_MODE;
/* Disable power down. */
reg &= ~ATPHY_SCR_MAC_PDOWN;
/* Enable CRS on Tx. */
reg |= ATPHY_SCR_ASSERT_CRS_ON_TX;
/* Auto correction for reversed cable polarity. */
reg |= ATPHY_SCR_POLARITY_REVERSAL;
PHY_WRITE(sc, ATPHY_SCR, reg);
/* Workaround F1 bug to reset phy. */
atphy_setmedia(sc, ife == NULL ? IFM_AUTO : ife->ifm_media);
for (i = 0; i < 1000; i++) {
DELAY(1);
if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0)
break;
}
}
static uint16_t
atphy_anar(struct ifmedia_entry *ife)
{
uint16_t anar;
anar = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10;
return (anar);
case IFM_1000_T:
return (anar);
case IFM_100_TX:
anar |= ANAR_TX;
break;
case IFM_10_T:
anar |= ANAR_10;
break;
default:
return (0);
}
if ((ife->ifm_media & IFM_FDX) != 0) {
if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_TX)
anar |= ANAR_TX_FD;
else
anar |= ANAR_10_FD;
}
return (anar);
}
static int
atphy_setmedia(struct mii_softc *sc, int media)
{
uint16_t anar;
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
if ((IFM_SUBTYPE(media) == IFM_AUTO || (media & IFM_FDX) != 0) &&
((media & IFM_FLOW) != 0 ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0))
anar |= ANAR_PAUSE_TOWARDS;
PHY_WRITE(sc, MII_ANAR, anar);
if ((sc->mii_extcapabilities &
(EXTSR_1000TFDX | EXTSR_1000THDX)) != 0)
PHY_WRITE(sc, MII_100T2CR, GTCR_ADV_1000TFDX |
GTCR_ADV_1000THDX);
else if (sc->mii_mpd_model == MII_MODEL_xxATHEROS_F1) {
/*
* AR8132 has 10/100 PHY and the PHY uses the same
* model number of F1 gigabit PHY. The PHY has no
* ability to establish gigabit link so explicitly
* disable 1000baseT configuration for the PHY.
* Otherwise, there is a case that atphy(4) could
* not establish a link against gigabit link partner
* unless the link partner supports down-shifting.
*/
PHY_WRITE(sc, MII_100T2CR, 0);
}
PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG);
return (EJUSTRETURN);
}