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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("$FreeBSD$");
/*
* 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 int smcphy_reset(struct mii_softc *);
static void smcphy_auto(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),
{ 0, 0 }
};
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 int
smcphy_probe(device_t dev)
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_SMSC ||
MII_MODEL(ma->mii_id2) != MII_MODEL_SMSC_LAN83C183)
return (ENXIO);
device_set_desc(dev, MII_STR_SMSC_LAN83C183);
return (0);
}
static int
smcphy_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
sc->mii_dev = device_get_parent(dev);
mii = ma->mii_data;
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = smcphy_service;
sc->mii_pdata = mii;
mii->mii_instance++;
sc->mii_flags |= MIIF_NOISOLATE;
if (smcphy_reset(sc) != 0) {
device_printf(dev, "reset failed\n");
}
/* Mask interrupts, we poll instead. */
PHY_WRITE(sc, 0x1e, 0xffc0);
sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
device_printf(dev, " ");
mii_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
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:
/*
* If we're not polling our PHY instance, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
break;
case MII_MEDIACHG:
/*
* If the media indicates a different PHY instance,
* isolate ourselves.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
reg = PHY_READ(sc, MII_BMCR);
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
return (0);
}
/*
* 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);
break;
default:
mii_phy_setmedia(sc);
break;
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
return (0);
}
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;
if (smcphy_reset(sc) != 0) {
device_printf(sc->mii_dev, "reset failed\n");
}
smcphy_auto(sc);
break;
}
/* Update the media status. */
ukphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static int
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) {
return (EIO);
}
PHY_WRITE(sc, MII_BMCR, 0x3000);
return (0);
}
static void
smcphy_auto(struct mii_softc *sc)
{
uint16_t anar;
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) |
ANAR_CSMA;
if (sc->mii_flags & MIIF_DOPAUSE)
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);
}
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