freebsd-dev/sys/dev/mii/mii_physubr.c
Alfred Perlstein e51a25f850 Remove __P.
2002-03-20 02:08:01 +00:00

340 lines
8.1 KiB
C

/* $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Subroutines common to all PHYs.
*/
#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 <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miibus_if.h"
#if !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif
void mii_phy_auto_timeout(void *);
int
mii_phy_auto(mii, waitfor)
struct mii_softc *mii;
int waitfor;
{
int bmsr, i;
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
PHY_WRITE(mii, MII_ANAR,
BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA);
PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP)
return (0);
DELAY(1000);
#if 0
if ((bmsr & BMSR_ACOMP) == 0)
printf("%s: autonegotiation failed to complete\n",
mii->mii_dev.dv_xname);
#endif
}
/*
* Don't need to worry about clearing MIIF_DOINGAUTO.
* If that's set, a timeout is pending, and it will
* clear the flag.
*/
return (EIO);
}
/*
* Just let it finish asynchronously. This is for the benefit of
* the tick handler driving autonegotiation. Don't want 500ms
* delays all the time while the system is running!
*/
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
mii->mii_flags |= MIIF_DOINGAUTO;
mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1);
}
return (EJUSTRETURN);
}
void
mii_phy_auto_stop(sc)
struct mii_softc *sc;
{
if (sc->mii_flags & MIIF_DOINGAUTO) {
sc->mii_flags &= ~MIIF_DOINGAUTO;
untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch);
}
}
void
mii_phy_auto_timeout(arg)
void *arg;
{
struct mii_softc *mii = arg;
int s, bmsr;
s = splnet();
mii->mii_flags &= ~MIIF_DOINGAUTO;
bmsr = PHY_READ(mii, MII_BMSR);
#if 0
if ((bmsr & BMSR_ACOMP) == 0)
printf("%s: autonegotiation failed to complete\n",
sc->sc_dev.dv_xname);
#endif
/* Update the media status. */
(void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT);
splx(s);
}
int
mii_phy_tick(sc)
struct mii_softc *sc;
{
struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
struct ifnet *ifp = sc->mii_pdata->mii_ifp;
int reg;
/*
* Is the interface even up?
*/
if ((ifp->if_flags & IFF_UP) == 0)
return (EJUSTRETURN);
/*
* If we're not doing autonegotiation, we don't need to do
* any extra work here. However, we need to check the link
* status so we can generate an announcement if the status
* changes.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
return (0);
/*
* check for link.
* Read the status register twice; BMSR_LINK is latch-low.
*/
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 (EJUSTRETURN);
sc->mii_ticks = 0;
mii_phy_reset(sc);
if (mii_phy_auto(sc, 0) == EJUSTRETURN)
return (EJUSTRETURN);
/*
* Might need to generate a status message if autonegotiation
* failed.
*/
return (0);
}
void
mii_phy_reset(mii)
struct mii_softc *mii;
{
int reg, i;
if (mii->mii_flags & MIIF_NOISOLATE)
reg = BMCR_RESET;
else
reg = BMCR_RESET | BMCR_ISO;
PHY_WRITE(mii, MII_BMCR, reg);
/* Wait 100ms for it to complete. */
for (i = 0; i < 100; i++) {
reg = PHY_READ(mii, MII_BMCR);
if ((reg & BMCR_RESET) == 0)
break;
DELAY(1000);
}
if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0))
PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO);
}
void
mii_phy_update(sc, cmd)
struct mii_softc *sc;
int cmd;
{
struct mii_data *mii = sc->mii_pdata;
if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
MIIBUS_STATCHG(sc->mii_dev);
sc->mii_active = mii->mii_media_active;
}
if (sc->mii_status != mii->mii_media_status) {
MIIBUS_LINKCHG(sc->mii_dev);
sc->mii_status = mii->mii_media_status;
}
}
/*
* Given an ifmedia word, return the corresponding ANAR value.
*/
int
mii_anar(media)
int media;
{
int rv;
switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
case IFM_ETHER|IFM_10_T:
rv = ANAR_10|ANAR_CSMA;
break;
case IFM_ETHER|IFM_10_T|IFM_FDX:
rv = ANAR_10_FD|ANAR_CSMA;
break;
case IFM_ETHER|IFM_100_TX:
rv = ANAR_TX|ANAR_CSMA;
break;
case IFM_ETHER|IFM_100_TX|IFM_FDX:
rv = ANAR_TX_FD|ANAR_CSMA;
break;
case IFM_ETHER|IFM_100_T4:
rv = ANAR_T4|ANAR_CSMA;
break;
default:
rv = 0;
break;
}
return (rv);
}
/*
* Given a BMCR value, return the corresponding ifmedia word.
*/
int
mii_media_from_bmcr(bmcr)
int bmcr;
{
int rv = IFM_ETHER;
if (bmcr & BMCR_S100)
rv |= IFM_100_TX;
else
rv |= IFM_10_T;
if (bmcr & BMCR_FDX)
rv |= IFM_FDX;
return (rv);
}
/*
* Initialize generic PHY media based on BMSR, called when a PHY is
* attached. We expect to be set up to print a comma-separated list
* of media names. Does not print a newline.
*/
void
mii_add_media(mii, bmsr, instance)
struct mii_data *mii;
int bmsr, instance;
{
const char *sep = "";
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
#define PRINT(s) printf("%s%s", sep, s); sep = ", "
if (bmsr & BMSR_10THDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0);
PRINT("10baseT");
}
if (bmsr & BMSR_10TFDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance),
BMCR_FDX);
PRINT("10baseT-FDX");
}
if (bmsr & BMSR_100TXHDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance),
BMCR_S100);
PRINT("100baseTX");
}
if (bmsr & BMSR_100TXFDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance),
BMCR_S100|BMCR_FDX);
PRINT("100baseTX-FDX");
}
if (bmsr & BMSR_100T4) {
/*
* XXX How do you enable 100baseT4? I assume we set
* XXX BMCR_S100 and then assume the PHYs will take
* XXX watever action is necessary to switch themselves
* XXX into T4 mode.
*/
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance),
BMCR_S100);
PRINT("100baseT4");
}
if (bmsr & BMSR_ANEG) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance),
BMCR_AUTOEN);
PRINT("auto");
}
#undef ADD
#undef PRINT
}