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/* $OpenBSD: amphy.c,v 1.21 2015/03/14 03:38:47 jsg Exp $ */
/*
* 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.
*
* $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $
*/
/*
* driver for AMD AM79c873 PHYs
* This driver also works for the Davicom DM9101 PHY, which appears to
* be an AM79c873 workalike.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <dev/mii/amphyreg.h>
int amphymatch(struct device *, void *, void *);
void amphyattach(struct device *, struct device *, void *);
struct cfattach amphy_ca = {
sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach
};
struct cfdriver amphy_cd = {
NULL, "amphy", DV_DULL
};
int amphy_service(struct mii_softc *, struct mii_data *, int);
void amphy_status(struct mii_softc *);
const struct mii_phy_funcs amphy_funcs = {
amphy_service, amphy_status, mii_phy_reset,
};
static const struct mii_phydesc amphys[] = {
{ MII_OUI_xxAMD, MII_MODEL_xxAMD_79C873,
MII_STR_xxAMD_79C873 },
{ MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101,
MII_STR_xxDAVICOM_DM9101 },
{ MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9102,
MII_STR_DAVICOM_DM9102 },
{ MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9601,
MII_STR_DAVICOM_DM9601 },
{ MII_OUI_xxALTIMA, MII_MODEL_AMD_79C875phy,
MII_STR_AMD_79C875phy },
{ 0, 0,
NULL },
};
int
amphymatch(struct device *parent, void *match, void *aux)
{
struct mii_attach_args *ma = aux;
if (mii_phy_match(ma, amphys) != NULL)
return (10);
return (0);
}
void
amphyattach(struct device *parent, struct device *self, void *aux)
{
struct mii_softc *sc = (struct mii_softc *)self;
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
const struct mii_phydesc *mpd;
mpd = mii_phy_match(ma, amphys);
printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_funcs = &hy_funcs;
sc->mii_pdata = mii;
sc->mii_flags = ma->mii_flags;
sc->mii_flags |= MIIF_NOISOLATE;
PHY_RESET(sc);
sc->mii_capabilities =
PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
if (sc->mii_capabilities & BMSR_MEDIAMASK)
mii_phy_add_media(sc);
}
int
amphy_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;
mii_phy_setmedia(sc);
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_phy_tick(sc) == EJUSTRETURN)
return (0);
break;
case MII_DOWN:
mii_phy_down(sc);
return (0);
}
/* Update the media status. */
mii_phy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
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_FDX;
else if (par & DSCSR_10HDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
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