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

216 lines
5.8 KiB
C

/*-
* Copyright (c) 1997, 1998, 1999
* Bill Paul <wpaul@ee.columbia.edu>. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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 AMD AM79c873 PHYs
* This driver also works for Davicom DM910{1,2} PHYs, which appear
* to be AM79c873 workalikes.
*/
#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/amphyreg.h>
#include "miibus_if.h"
static int amphy_probe(device_t);
static int amphy_attach(device_t);
static device_method_t amphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, amphy_probe),
DEVMETHOD(device_attach, amphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t amphy_devclass;
static driver_t amphy_driver = {
"amphy",
amphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
static int amphy_service(struct mii_softc *, struct mii_data *, int);
static void amphy_status(struct mii_softc *);
static const struct mii_phydesc amphys[] = {
MII_PHY_DESC(xxDAVICOM, DM9102),
MII_PHY_DESC(xxDAVICOM, DM9101),
MII_PHY_DESC(yyDAVICOM, DM9101),
MII_PHY_END
};
static const struct mii_phy_funcs amphy_funcs = {
amphy_service,
amphy_status,
mii_phy_reset
};
static int
amphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
}
static int
amphy_attach(device_t dev)
{
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &amphy_funcs, 1);
return (0);
}
static int
amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
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;
mii_phy_setmedia(sc);
break;
case MII_TICK:
if (mii_phy_tick(sc) == EJUSTRETURN)
return (0);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
amphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmsr, bmcr, par, anlpar;
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)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, 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) {
/*
* The PAR status bits are only valid if autonegotiation
* has completed (or it's disabled).
*/
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
anlpar = PHY_READ(sc, MII_ANAR) &
PHY_READ(sc, MII_ANLPAR);
if (anlpar & ANLPAR_TX_FD)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_T4)
mii->mii_media_active |= IFM_100_T4|IFM_HDX;
else if (anlpar & ANLPAR_TX)
mii->mii_media_active |= IFM_100_TX|IFM_HDX;
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|IFM_HDX;
else
mii->mii_media_active |= IFM_NONE;
return;
}
/*
* Link partner is not capable of autonegotiation.
*/
par = PHY_READ(sc, MII_AMPHY_DSCSR);
if (par & DSCSR_100FDX)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (par & DSCSR_100HDX)
mii->mii_media_active |= IFM_100_TX|IFM_HDX;
else if (par & DSCSR_10FDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
else if (par & DSCSR_10HDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
if ((mii->mii_media_active & IFM_FDX) != 0)
mii->mii_media_active |= mii_phy_flowstatus(sc);
} else
mii->mii_media_active = ife->ifm_media;
}