/* $NetBSD: gphyter.c,v 1.37 2020/03/15 23:04:50 thorpej 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.
*
* 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.
*/
/*
* driver for National Semiconductor's DP83891, DP83861 and DP83865
* `Gig PHYTER' ethernet 10/100/1000 PHYs. The DP83891 is an older,
* non-firmware-driven version of the DP83861. The DP83865 is a low
* power version of the DP83861.
*
* Data Sheets available from www.national.com:
* http://www.national.com/ds/DP/DP83861.pdf
* http://www.national.com/ds/DP/DP83865.pdf
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gphyter.c,v 1.37 2020/03/15 23:04:50 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <dev/mii/gphyterreg.h>
static int gphytermatch(device_t, cfdata_t, void *);
static void gphyterattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(gphyter, sizeof(struct mii_softc),
gphytermatch, gphyterattach, mii_phy_detach, mii_phy_activate);
static int gphyter_service(struct mii_softc *, struct mii_data *, int);
static void gphyter_status(struct mii_softc *);
static void gphyter_reset(struct mii_softc *);
static const struct mii_phy_funcs gphyter_funcs = {
gphyter_service, gphyter_status, gphyter_reset,
};
static const struct mii_phydesc gphyters[] = {
MII_PHY_DESC(xxNATSEMI, DP83861),
MII_PHY_DESC(xxNATSEMI, DP83865),
MII_PHY_DESC(xxNATSEMI, DP83891),
MII_PHY_END,
};
static int
gphytermatch(device_t parent, cfdata_t match, void *aux)
{
struct mii_attach_args *ma = aux;
if (mii_phy_match(ma, gphyters) != NULL)
return 10;
return 0;
}
static void
gphyterattach(device_t parent, device_t self, void *aux)
{
struct mii_softc *sc = device_private(self);
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
const struct mii_phydesc *mpd;
uint16_t anar, strap;
mpd = mii_phy_match(ma, gphyters);
aprint_naive(": Media interface\n");
aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
sc->mii_dev = self;
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_funcs = &gphyter_funcs;
sc->mii_pdata = mii;
sc->mii_flags = ma->mii_flags;
mii_lock(mii);
PHY_RESET(sc);
PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
sc->mii_capabilities &= ma->mii_capmask;
if (sc->mii_capabilities & BMSR_EXTSTAT)
PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities);
/*
* The Gig PHYTER seems to have the 10baseT BMSR bits hard-wired to 0,
* even though the device supports 10baseT. What we do instead is read
* the post-reset ANAR, who's 10baseT-related bits are set by strapping
* pin 180, and fake the BMSR bits.
*/
PHY_READ(sc, MII_ANAR, &anar);
if (anar & ANAR_10)
sc->mii_capabilities |= (BMSR_10THDX & ma->mii_capmask);
if (anar & ANAR_10_FD)
sc->mii_capabilities |= (BMSR_10TFDX & ma->mii_capmask);
mii_unlock(mii);
mii_phy_add_media(sc);
mii_lock(mii);
PHY_READ(sc, MII_GPHYTER_STRAP, &strap);
mii_unlock(mii);
aprint_normal_dev(self, "strapped to %s mode",
(strap & STRAP_MS_VAL) ? "master" : "slave");
if (strap & STRAP_NC_MODE)
aprint_normal(", pre-C5 BCM5400 compat enabled");
aprint_normal("\n");
}
static int
gphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint16_t reg;
KASSERT(mii_locked(mii));
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) {
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;
}
static void
gphyter_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint16_t bmsr, bmcr, physup, gtsr;
KASSERT(mii_locked(mii));
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
PHY_READ(sc, MII_BMSR, &bmsr);
PHY_READ(sc, MII_BMSR, &bmsr);
PHY_READ(sc, MII_GPHYTER_PHY_SUP, &physup);
if (physup & PHY_SUP_LINK)
mii->mii_media_status |= IFM_ACTIVE;
PHY_READ(sc, MII_BMCR, &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 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;
}
switch (physup & (PHY_SUP_SPEED1 | PHY_SUP_SPEED0)) {
case PHY_SUP_SPEED1:
mii->mii_media_active |= IFM_1000_T;
PHY_READ(sc, MII_100T2SR, >sr);
if (gtsr & GTSR_MS_RES)
mii->mii_media_active |= IFM_ETH_MASTER;
break;
case PHY_SUP_SPEED0:
mii->mii_media_active |= IFM_100_TX;
break;
case 0:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
}
if (physup & PHY_SUP_DUPLEX)
mii->mii_media_active |=
IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
void
gphyter_reset(struct mii_softc *sc)
{
int i;
uint16_t reg;
KASSERT(mii_locked(sc->mii_pdata));
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 manual
* states that there should be a 500us delay between asserting software
* reset and attempting MII serial operations. Also, a DP83815 can get
* into a bad state on cable removal and reinsertion if we do not
* delay here.
*/
delay(500);
/* Wait another 100ms for it to complete. */
for (i = 0; i < 100; i++) {
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);
}