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/*-
* 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: release/9.1.0/sys/dev/mii/smcphy.c 233485 2012-03-26 02:40:54Z yongari $");
/*
* Driver for the internal PHY on the SMSC LAN91C111.
*/
#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 smcphy_probe(device_t);
static int smcphy_attach(device_t);
static int smcphy_service(struct mii_softc *, struct mii_data *, int);
static void smcphy_reset(struct mii_softc *);
static void smcphy_auto(struct mii_softc *, int);
static void smcphy_status(struct mii_softc *);
static device_method_t smcphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, smcphy_probe),
DEVMETHOD(device_attach, smcphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t smcphy_devclass;
static driver_t smcphy_driver = {
"smcphy",
smcphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0);
static const struct mii_phydesc smcphys[] = {
MII_PHY_DESC(SEEQ, 80220),
MII_PHY_DESC(SEEQ, 84220),
MII_PHY_END
};
static const struct mii_phy_funcs smcphy80220_funcs = {
smcphy_service,
smcphy_status,
mii_phy_reset
};
static const struct mii_phy_funcs smcphy_funcs = {
smcphy_service,
smcphy_status,
smcphy_reset
};
static int
smcphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
}
static int
smcphy_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
const struct mii_phy_funcs *mpf;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
mpf = &smcphy80220_funcs;
else
mpf = &smcphy_funcs;
mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
mii_phy_setmedia(sc);
return (0);
}
static int
smcphy_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:
smcphy_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);
smcphy_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
smcphy_reset(struct mii_softc *sc)
{
u_int bmcr;
int timeout;
PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
for (timeout = 2; timeout > 0; timeout--) {
DELAY(50000);
bmcr = PHY_READ(sc, MII_BMCR);
if ((bmcr & BMCR_RESET) == 0)
break;
}
if (bmcr & BMCR_RESET)
device_printf(sc->mii_dev, "reset failed\n");
PHY_WRITE(sc, MII_BMCR, 0x3000);
/* Mask interrupts, we poll instead. */
PHY_WRITE(sc, 0x1e, 0xffc0);
}
static void
smcphy_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
smcphy_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, 0x12);
if (status & 0x0080)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (status & 0x0040)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
}