NetBSD/sys/dev/mii/mii_physubr.c

426 lines
10 KiB
C

/* $NetBSD: mii_physubr.c,v 1.18 2000/07/04 03:28:59 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000 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/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/route.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
/*
* Media to register setting conversion table. Order matters.
*/
const struct mii_media mii_media_table[] = {
{ BMCR_ISO, ANAR_CSMA }, /* None */
{ 0, ANAR_CSMA|ANAR_10 }, /* 10baseT */
{ BMCR_FDX, ANAR_CSMA|ANAR_10_FD }, /* 10baseT-FDX */
{ BMCR_S100, ANAR_CSMA|ANAR_T4 }, /* 100baseT4 */
{ BMCR_S100, ANAR_CSMA|ANAR_TX }, /* 100baseTX */
{ BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD }, /* 100baseTX-FDX */
};
void mii_phy_auto_timeout __P((void *));
void
mii_phy_setmedia(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmcr, anar;
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0)
(void) mii_phy_auto(sc, 1);
return;
}
/*
* Table index is stored in the media entry.
*/
#ifdef DIAGNOSTIC
if (ife->ifm_data < 0 || ife->ifm_data >= MII_NMEDIA)
panic("mii_phy_setmedia");
#endif
anar = mii_media_table[ife->ifm_data].mm_anar;
bmcr = mii_media_table[ife->ifm_data].mm_bmcr;
if (ife->ifm_media & IFM_LOOP)
bmcr |= BMCR_LOOP;
PHY_WRITE(sc, MII_ANAR, anar);
PHY_WRITE(sc, MII_BMCR, bmcr);
}
int
mii_phy_auto(sc, waitfor)
struct mii_softc *sc;
int waitfor;
{
int bmsr, i;
if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
PHY_WRITE(sc, MII_ANAR,
BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA);
PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((bmsr = PHY_READ(sc, MII_BMSR)) & BMSR_ACOMP)
return (0);
delay(1000);
}
/*
* 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 ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
sc->mii_flags |= MIIF_DOINGAUTO;
callout_reset(&sc->mii_nway_ch, hz >> 1,
mii_phy_auto_timeout, sc);
}
return (EJUSTRETURN);
}
void
mii_phy_auto_timeout(arg)
void *arg;
{
struct mii_softc *sc = arg;
int s, bmsr;
if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
return;
s = splnet();
sc->mii_flags &= ~MIIF_DOINGAUTO;
bmsr = PHY_READ(sc, MII_BMSR);
/* Update the media status. */
(void) PHY_SERVICE(sc, sc->mii_pdata, MII_POLLSTAT);
splx(s);
}
int
mii_phy_tick(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
/* Just bail now if the interface is down. */
if ((mii->mii_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);
/* 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) {
/*
* See above.
*/
return (0);
}
/*
* Only retry autonegotiation every 5 seconds.
*/
if (++sc->mii_ticks != 5)
return (EJUSTRETURN);
sc->mii_ticks = 0;
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(sc)
struct mii_softc *sc;
{
int reg, i;
if (sc->mii_flags & MIIF_NOISOLATE)
reg = BMCR_RESET;
else
reg = BMCR_RESET | BMCR_ISO;
PHY_WRITE(sc, MII_BMCR, reg);
/* Wait 100ms for it to complete. */
for (i = 0; i < 100; i++) {
reg = PHY_READ(sc, MII_BMCR);
if ((reg & BMCR_RESET) == 0)
break;
delay(1000);
}
if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
}
void
mii_phy_down(sc)
struct mii_softc *sc;
{
if (sc->mii_flags & MIIF_DOINGAUTO) {
sc->mii_flags &= ~MIIF_DOINGAUTO;
callout_stop(&sc->mii_nway_ch);
}
}
void
mii_phy_status(sc)
struct mii_softc *sc;
{
PHY_STATUS(sc);
}
void
mii_phy_update(sc, cmd)
struct mii_softc *sc;
int cmd;
{
struct mii_data *mii = sc->mii_pdata;
if (sc->mii_media_active != mii->mii_media_active ||
sc->mii_media_status != mii->mii_media_status ||
cmd == MII_MEDIACHG) {
(*mii->mii_statchg)(sc->mii_dev.dv_parent);
mii_phy_statusmsg(sc);
sc->mii_media_active = mii->mii_media_active;
sc->mii_media_status = mii->mii_media_status;
}
}
void
mii_phy_statusmsg(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
struct ifnet *ifp = mii->mii_ifp;
int s, baudrate, link_state, announce = 0;
if (mii->mii_media_status & IFM_AVALID) {
if (mii->mii_media_status & IFM_ACTIVE)
link_state = LINK_STATE_UP;
else
link_state = LINK_STATE_DOWN;
} else
link_state = LINK_STATE_UNKNOWN;
baudrate = ifmedia_baudrate(mii->mii_media_active);
if (link_state != ifp->if_link_state) {
ifp->if_link_state = link_state;
/*
* XXX Right here we'd like to notify protocols
* XXX that the link status has changed, so that
* XXX e.g. Duplicate Address Detection can restart.
*/
announce = 1;
}
if (baudrate != ifp->if_baudrate) {
ifp->if_baudrate = baudrate;
announce = 1;
}
if (announce) {
s = splimp(); /* XXX Should be splnet() */
rt_ifmsg(ifp);
splx(s);
}
}
/*
* 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_phy_add_media(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
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 ((sc->mii_flags & MIIF_NOISOLATE) == 0)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
MII_MEDIA_NONE);
if (sc->mii_capabilities & BMSR_10THDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
MII_MEDIA_10_T);
#if 0
if ((sc->mii_flags & MIIF_NOLOOP) == 0)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP,
sc->mii_inst), MII_MEDIA_10_T);
#endif
PRINT("10baseT");
}
if (sc->mii_capabilities & BMSR_10TFDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
MII_MEDIA_10_T_FDX);
PRINT("10baseT-FDX");
}
if (sc->mii_capabilities & BMSR_100TXHDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
MII_MEDIA_100_TX);
#if 0
if ((sc->mii_flags & MIIF_NOLOOP) == 0)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
sc->mii_inst), MII_MEDIA_100_TX);
#endif
PRINT("100baseTX");
}
if (sc->mii_capabilities & BMSR_100TXFDX) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
MII_MEDIA_100_TX_FDX);
PRINT("100baseTX-FDX");
}
if (sc->mii_capabilities & BMSR_100T4) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst),
MII_MEDIA_100_T4);
#if 0
if ((sc->mii_flags & MIIF_NOLOOP) == 0)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, IFM_LOOP,
sc->mii_inst), MII_MEDIA_100_T4);
#endif
PRINT("100baseT4");
}
if (sc->mii_capabilities & BMSR_ANEG) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
MII_NMEDIA); /* intentionally invalid index */
PRINT("auto");
}
#undef ADD
#undef PRINT
}
void
mii_phy_delete_media(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
ifmedia_delete_instance(&mii->mii_media, sc->mii_inst);
}
int
mii_phy_activate(self, act)
struct device *self;
enum devact act;
{
int rv = 0;
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
/* Nothing special to do. */
break;
}
return (rv);
}
int
mii_phy_detach(self, flags)
struct device *self;
int flags;
{
struct mii_softc *sc = (void *) self;
if (sc->mii_flags & MIIF_DOINGAUTO)
callout_stop(&sc->mii_nway_ch);
mii_phy_delete_media(sc);
return (0);
}