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/* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej 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.
*
* 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.
*/
/*-
* Copyright (c) 1997 Manuel Bouyer. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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: release/9.1.0/sys/dev/mii/nsphy.c 229093 2011-12-31 14:12:12Z hselasky $");
/*
* driver for National Semiconductor's DP83840A ethernet 10/100 PHY
* Data Sheet available from www.national.com
*/
#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 "miidevs.h"
#include <dev/mii/nsphyreg.h>
#include "miibus_if.h"
static int nsphy_probe(device_t);
static int nsphy_attach(device_t);
static device_method_t nsphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, nsphy_probe),
DEVMETHOD(device_attach, nsphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t nsphy_devclass;
static driver_t nsphy_driver = {
"nsphy",
nsphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
static int nsphy_service(struct mii_softc *, struct mii_data *, int);
static void nsphy_status(struct mii_softc *);
static void nsphy_reset(struct mii_softc *);
static const struct mii_phydesc nsphys[] = {
MII_PHY_DESC(xxNATSEMI, DP83840),
MII_PHY_END
};
static const struct mii_phy_funcs nsphy_funcs = {
nsphy_service,
nsphy_status,
nsphy_reset
};
static int
nsphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT));
}
static int
nsphy_attach(device_t dev)
{
const char *nic;
u_int flags;
nic = device_get_name(device_get_parent(device_get_parent(dev)));
flags = MIIF_NOMANPAUSE;
/*
* Am79C971 wedge when isolating all of their external PHYs.
*/
if (strcmp(nic, "pcn") == 0)
flags |= MIIF_NOISOLATE;
mii_phy_dev_attach(dev, flags, &nsphy_funcs, 1);
return (0);
}
static int
nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
int reg;
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;
reg = PHY_READ(sc, MII_NSPHY_PCR);
/*
* Set up the PCR to use LED4 to indicate full-duplex
* in both 10baseT and 100baseTX modes.
*/
reg |= PCR_LED4MODE;
/*
* Make sure Carrier Integrity Monitor function is
* disabled (normal for Node operation, but sometimes
* it's not set?!)
*/
reg |= PCR_CIMDIS;
/*
* Make sure "force link good" is set to normal mode.
* It's only intended for debugging.
*/
reg |= PCR_FLINK100;
/*
* Mystery bits which are supposedly `reserved',
* but we seem to need to set them when the PHY
* is connected to some interfaces:
*
* 0x0400 is needed for fxp
* (Intel EtherExpress Pro 10+/100B, 82557 chip)
* (nsphy with a DP83840 chip)
* 0x0100 may be needed for some other card
*/
reg |= 0x0100 | 0x0400;
if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0)
PHY_WRITE(sc, MII_NSPHY_PCR, reg);
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
nsphy_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;
}
/*
* Argh. The PAR doesn't seem to indicate duplex mode
* properly! Determine media based on link partner's
* advertised capabilities.
*/
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;
if ((mii->mii_media_active & IFM_FDX) != 0)
mii->mii_media_active |=
mii_phy_flowstatus(sc);
return;
}
/*
* Link partner is not capable of autonegotiation.
* We will never be in full-duplex mode if this is
* the case, so reading the PAR is OK.
*/
par = PHY_READ(sc, MII_NSPHY_PAR);
if (par & PAR_10)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_100_TX;
mii->mii_media_active |= IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
static void
nsphy_reset(struct mii_softc *sc)
{
struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
int reg, i;
if (sc->mii_flags & MIIF_NOISOLATE)
reg = BMCR_RESET;
else
reg = BMCR_RESET | BMCR_ISO;
PHY_WRITE(sc, MII_BMCR, reg);
/*
* It is best to allow a little time for the reset to settle
* in before we start polling the BMCR again. Notably, the
* DP83840A manuals state that there should be a 500us delay
* between asserting software reset and attempting MII serial
* operations. Be conservative.
*/
DELAY(1000);
/*
* Wait another 2s for it to complete.
* This is only a little overkill as under normal circumstances
* the PHY can take up to 1s to complete reset.
* This is also a bit odd because after a reset, the BMCR will
* clear the reset bit and simply reports 0 even though the reset
* is not yet complete.
*/
for (i = 0; i < 1000; i++) {
reg = PHY_READ(sc, MII_BMCR);
if (reg != 0 && (reg & BMCR_RESET) == 0)
break;
DELAY(2000);
}
if ((sc->mii_flags & MIIF_NOISOLATE) == 0) {
if ((ife == NULL && sc->mii_inst != 0) ||
(ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
}
}