freebsd-dev/sys/dev/mii/smscphy.c
2012-09-23 08:44:12 +00:00

236 lines
5.7 KiB
C

/*-
* Copyright (c) 2006 Benno Rice. 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.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Driver for the SMSC LAN8710A
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <machine/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 "miibus_if.h"
static int smscphy_probe(device_t);
static int smscphy_attach(device_t);
static int smscphy_service(struct mii_softc *, struct mii_data *, int);
static void smscphy_auto(struct mii_softc *, int);
static void smscphy_status(struct mii_softc *);
static device_method_t smscphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, smscphy_probe),
DEVMETHOD(device_attach, smscphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t smscphy_devclass;
static driver_t smscphy_driver = {
"smscphy",
smscphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(smscphy, miibus, smscphy_driver, smscphy_devclass, 0, 0);
static const struct mii_phydesc smscphys[] = {
MII_PHY_DESC(SMC, LAN8710A),
MII_PHY_END
};
static const struct mii_phy_funcs smscphy_funcs = {
smscphy_service,
smscphy_status,
mii_phy_reset
};
static int
smscphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT));
}
static int
smscphy_attach(device_t dev)
{
struct mii_softc *sc;
const struct mii_phy_funcs *mpf;
sc = device_get_softc(dev);
mpf = &smscphy_funcs;
mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
mii_phy_setmedia(sc);
return (0);
}
static int
smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife;
int reg;
ife = mii->mii_media.ifm_cur;
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(ife->ifm_media)) {
case IFM_AUTO:
smscphy_auto(sc, ife->ifm_media);
break;
default:
mii_phy_setmedia(sc);
break;
}
break;
case MII_TICK:
if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
return (0);
}
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
break;
}
/* I have no idea why BMCR_ISO gets set. */
reg = PHY_READ(sc, MII_BMCR);
if (reg & BMCR_ISO) {
PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
}
reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
if (++sc->mii_ticks <= MII_ANEGTICKS) {
break;
}
sc->mii_ticks = 0;
PHY_RESET(sc);
smscphy_auto(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
smscphy_auto(struct mii_softc *sc, int media)
{
uint16_t anar;
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |= ANAR_FC;
PHY_WRITE(sc, MII_ANAR, anar);
/* Apparently this helps. */
anar = PHY_READ(sc, MII_ANAR);
PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
}
static void
smscphy_status(struct mii_softc *sc)
{
struct mii_data *mii;
uint32_t bmcr, bmsr, status;
mii = sc->mii_pdata;
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;
if ((bmcr & BMCR_AUTOEN) != 0) {
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
status = PHY_READ(sc, 0x1F);
if (status & 0x0008)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (status & 0x0010)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
}