/* $NetBSD: sqphy.c,v 1.56 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 Seeq 80220/80221, 80223, and 80225 10/100 ethernet PHYs
* datasheet from www.seeq.com
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sqphy.c,v 1.56 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/sqphyreg.h>
static int sqphymatch(device_t, cfdata_t, void *);
static void sqphyattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(sqphy, sizeof(struct mii_softc),
sqphymatch, sqphyattach, mii_phy_detach, mii_phy_activate);
static int sqphy_service(struct mii_softc *, struct mii_data *, int);
static void sqphy_status(struct mii_softc *);
static void sqphy_84220_reset(struct mii_softc *);
static const struct mii_phy_funcs sqphy_funcs = {
sqphy_service, sqphy_status, mii_phy_reset,
};
static const struct mii_phy_funcs sqphy_84220_funcs = {
sqphy_service, sqphy_status, sqphy_84220_reset,
};
static const struct mii_phydesc sqphys[] = {
MII_PHY_DESC(SEEQ, 80220),
MII_PHY_DESC(SEEQ, 80225),
MII_PHY_DESC(SEEQ, 84220),
MII_PHY_END,
};
static int
sqphymatch(device_t parent, cfdata_t match, void *aux)
{
struct mii_attach_args *ma = aux;
if (mii_phy_match(ma, sqphys) != NULL)
return 10;
return 0;
}
static void
sqphyattach(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;
mpd = mii_phy_match(ma, sqphys);
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_pdata = mii;
sc->mii_flags = ma->mii_flags;
switch (MII_MODEL(ma->mii_id2)) {
case MII_MODEL_SEEQ_84220:
sc->mii_funcs = &sqphy_84220_funcs;
aprint_normal_dev(self,
"using Seeq 84220 isolate/reset hack\n");
break;
default:
sc->mii_funcs = &sqphy_funcs;
}
mii_lock(mii);
PHY_RESET(sc);
PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
sc->mii_capabilities &= ma->mii_capmask;
mii_unlock(mii);
mii_phy_add_media(sc);
}
static int
sqphy_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
sqphy_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, status;
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);
if (bmsr & BMSR_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) {
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
/*
* Note: don't get fancy here -- the 80225 only supports the
* SPD_DET and DPLX_DET bits in the STATUS register.
*/
PHY_READ(sc, MII_SQPHY_STATUS, &status);
if (status & STATUS_SPD_DET)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (status & STATUS_DPLX_DET)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
static void
sqphy_84220_reset(struct mii_softc *sc)
{
uint16_t reg;
KASSERT(mii_locked(sc->mii_pdata));
mii_phy_reset(sc);
/*
* This PHY sometimes insists on coming out of reset isolated,
* even when the MDA[0-3] pins are pulled high (to indicate
* PHY address 0), contrary to the device's datasheet.
*
* Morever, simply clearing BMCR_ISO here isn't enough; the
* change won't stick until about 30mS *after* the PHY has
* been reset.
*
* This sucks.
*/
if ((sc->mii_inst != 0) && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
return;
PHY_READ(sc, MII_BMCR, ®);
while ((reg & BMCR_ISO) != 0) {
delay(35000);
PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
delay(35000);
PHY_READ(sc, MII_BMCR, ®);
}
}