freebsd-dev/sys/dev/mii/nsphyter.c
Marius Strobl d47d37af9b Add a driver for the National Semiconductor DP83815, DP83843 and
DP83847 PHYs. The main reason for using a specific driver for these
PHYs are reset quirks similar to the nsphy(4) driven DP83840A.

PR:		112654
Obtained from:	NetBSD
MFC after:	2 weeks
Thanks to:	mlaier for testing w/ DP83815
2008-01-27 01:10:41 +00:00

342 lines
10 KiB
C

/* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 msaitoh Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000, 2001 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.
*/
/*-
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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("$FreeBSD$");
/*
* driver for National Semiconductor's DP83843 `PHYTER' ethernet 10/100 PHY
* Data Sheet available from www.national.com
*
* We also support the DP83815 `MacPHYTER' internal PHY since, for our
* purposes, they are compatible.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.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/nsphyterreg.h>
#include "miibus_if.h"
static device_probe_t nsphyter_probe;
static device_attach_t nsphyter_attach;
static device_method_t nsphyter_methods[] = {
/* device interface */
DEVMETHOD(device_probe, nsphyter_probe),
DEVMETHOD(device_attach, nsphyter_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t nsphyter_devclass;
static driver_t nsphyter_driver = {
"nsphyter",
nsphyter_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, nsphyter_devclass, 0, 0);
static int nsphyter_service(struct mii_softc *, struct mii_data *, int);
static void nsphyter_status(struct mii_softc *);
static void nsphyter_reset(struct mii_softc *);
static const struct mii_phydesc nsphys[] = {
MII_PHY_DESC(NATSEMI, DP83815),
MII_PHY_DESC(NATSEMI, DP83843),
MII_PHY_DESC(NATSEMI, DP83847),
MII_PHY_END
};
static int
nsphyter_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT));
}
static int
nsphyter_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
const char *nic;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
sc->mii_dev = device_get_parent(dev);
mii = device_get_softc(sc->mii_dev);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = nsphyter_service;
sc->mii_pdata = mii;
mii->mii_instance++;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
nic = device_get_name(device_get_parent(sc->mii_dev));
/*
* In order for MII loopback to work Am79C971 and greater PCnet
* chips additionally need to be placed into external loopback
* mode which pcn(4) doesn't do so far.
*/
if (strcmp(nic, "pcn") != 0)
#if 1
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
sc->mii_inst), MII_MEDIA_100_TX);
#else
if (strcmp(nic, "pcn") == 0)
sc->mii_flags |= MIIF_NOLOOP;
#endif
nsphyter_reset(sc);
sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
nsphyter_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;
}
/* Update the media status. */
nsphyter_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
nsphyter_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmsr, bmcr, physts;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS);
if ((physts & PHYSTS_LINK) != 0)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if ((bmcr & BMCR_ISO) != 0) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if ((bmcr & BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
if ((bmcr & BMCR_AUTOEN) != 0) {
/*
* The media 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 ((physts & PHYSTS_SPEED10) != 0)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_100_TX;
if ((physts & PHYSTS_DUPLEX) != 0)
#ifdef notyet
mii->mii_media_active |=
IFM_FDX | mii_phy_flowstatus(sc);
#else
mii->mii_media_active |= IFM_FDX;
#endif
else
mii->mii_media_active |= IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
static void
nsphyter_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) != 0)
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
* DP8384{3,7} manuals state that there should be a 500us delay
* between asserting software reset and attempting MII serial
* operations. Be conservative. Also, a DP83815 can get into
* a bad state on cable removal and reinsertion if we do not
* delay here.
*/
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);
}
}