freebsd-dev/sys/dev/mii/tdkphy.c

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/*
* Copyright (c) 2000,2001 Jonathan Chen.
* 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,
* without modification, immediately at the beginning of the file.
* 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.
*
* $FreeBSD$
*/
/*
* Driver for the TDK 78Q2120 MII
*
* References:
* Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf
* Most of this code stolen from ukphy.c
*/
/*
* The TDK 78Q2120 is found on some Xircom X3201 based cardbus cards. It's just
* like any other normal phy, except it does auto negotiation in a different
* way.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_media.h>
#include <machine/clock.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <dev/mii/tdkphyreg.h>
#include "miibus_if.h"
#if !defined(lint)
static const char rcsid[] =
"$Id: tdkphy.c,v 1.3 2000/10/14 06:20:56 jon Exp $";
#endif
static int tdkphy_probe __P((device_t));
static int tdkphy_attach __P((device_t));
static int tdkphy_detach __P((device_t));
static device_method_t tdkphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, tdkphy_probe),
DEVMETHOD(device_attach, tdkphy_attach),
DEVMETHOD(device_detach, tdkphy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t tdkphy_devclass;
static driver_t tdkphy_driver = {
"tdkphy",
tdkphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0);
int tdkphy_service __P((struct mii_softc *, struct mii_data *, int));
void tdkphy_status __P((struct mii_softc *));
static int
tdkphy_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_TDK ||
MII_MODEL(ma->mii_id2) != MII_MODEL_TDK_78Q2120))
return (ENXIO);
device_set_desc(dev, MII_STR_TDK_78Q2120);
return (0);
}
static int
tdkphy_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 = device_get_softc(sc->mii_dev);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
if (bootverbose)
device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
MII_OUI(ma->mii_id1, ma->mii_id2),
MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = tdkphy_service;
sc->mii_pdata = mii;
mii->mii_instance++;
sc->mii_flags |= MIIF_NOISOLATE;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
BMCR_ISO);
#if 0
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
BMCR_LOOP|BMCR_S100);
#endif
mii_phy_reset(sc);
sc->mii_capabilities =
PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
device_printf(dev, " ");
if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
printf("no media present");
else
mii_add_media(mii, sc->mii_capabilities,
sc->mii_inst);
printf("\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int tdkphy_detach(device_t dev)
{
struct mii_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(device_get_parent(dev));
mii_phy_auto_stop(sc);
sc->mii_dev = NULL;
LIST_REMOVE(sc, mii_list);
return(0);
}
int
tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
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:
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
return (0);
(void) mii_phy_auto(sc, 1);
break;
case IFM_100_T4:
/*
* Not supported on MII
*/
return (EINVAL);
default:
/*
* BMCR data is stored in the ifmedia entry.
*/
PHY_WRITE(sc, MII_ANAR,
mii_anar(ife->ifm_media));
PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
return (0);
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* Check to see if we have link. If we do, we don't
* need to restart the autonegotiation process. Read
* the BMSR twice in case it's latched.
*/
reg = PHY_READ(sc, MII_BMSR) |
PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK)
return (0);
/*
* Only retry autonegotiation every 5 seconds.
*/
if (++sc->mii_ticks != 5)
return (0);
sc->mii_ticks = 0;
mii_phy_reset(sc);
if (mii_phy_auto(sc, 0) == EJUSTRETURN)
return (0);
break;
}
/* Update the media status. */
tdkphy_status(sc);
if (sc->mii_pdata->mii_media_active & IFM_FDX)
PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
else
PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
/* Callback if something changed. */
if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
MIIBUS_STATCHG(sc->mii_dev);
sc->mii_active = mii->mii_media_active;
}
return (0);
}
void
tdkphy_status(struct mii_softc *phy)
{
struct mii_data *mii = phy->mii_pdata;
int bmsr, bmcr, anlpar, diag;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
if (bmsr & BMSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(phy, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & BMCR_AUTOEN) {
/*
* NWay autonegotiation takes the highest-order common
* bit of the ANAR and ANLPAR (i.e. best media advertised
* both by us and our link partner).
*/
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
/*
* ANLPAR doesn't get set on my card, but we check it anyway,
* since it is mentioned in the 78Q2120 specs.
*/
if (anlpar & ANLPAR_T4)
mii->mii_media_active |= IFM_100_T4;
else if (anlpar & ANLPAR_TX_FD)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_TX)
mii->mii_media_active |= IFM_100_TX;
else if (anlpar & ANLPAR_10_FD)
mii->mii_media_active |= IFM_10_T|IFM_FDX;
else if (anlpar & ANLPAR_10)
mii->mii_media_active |= IFM_10_T;
else {
/*
* ANLPAR isn't set, which leaves two possibilities:
* 1) Auto negotiation failed
* 2) Auto negotiation completed, but the card forgot
* to set ANLPAR.
* So we check the MII_DIAG(18) register...
*/
diag = PHY_READ(phy, MII_DIAG);
if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
mii->mii_media_active |= IFM_10_T;
else {
if (diag & DIAG_DUPLEX)
mii->mii_media_active |= IFM_FDX;
if (diag & DIAG_RATE_100)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
}
}
} else {
mii->mii_media_active = mii_media_from_bmcr(bmcr);
}
}