349 lines
9.8 KiB
C
349 lines
9.8 KiB
C
/* $NetBSD: nsphy.c,v 1.66 2020/03/15 23:04:50 thorpej Exp $ */
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/*-
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* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1997 Manuel Bouyer. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* driver for National Semiconductor's DP83840A ethernet 10/100 PHY
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* Data Sheet available from www.national.com
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.66 2020/03/15 23:04:50 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include <dev/mii/miidevs.h>
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#include <dev/mii/nsphyreg.h>
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static int nsphymatch(device_t, cfdata_t, void *);
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static void nsphyattach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc),
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nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate);
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static int nsphy_service(struct mii_softc *, struct mii_data *, int);
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static void nsphy_status(struct mii_softc *);
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static void nsphy_reset(struct mii_softc *sc);
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static const struct mii_phy_funcs nsphy_funcs = {
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nsphy_service, nsphy_status, nsphy_reset,
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};
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static const struct mii_phydesc nsphys[] = {
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MII_PHY_DESC(xxNATSEMI, DP83840),
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MII_PHY_END,
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};
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static int
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nsphymatch(device_t parent, cfdata_t match, void *aux)
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{
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struct mii_attach_args *ma = aux;
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if (mii_phy_match(ma, nsphys) != NULL)
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return 10;
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return 0;
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}
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static void
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nsphyattach(device_t parent, device_t self, void *aux)
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{
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struct mii_softc *sc = device_private(self);
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struct mii_attach_args *ma = aux;
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struct mii_data *mii = ma->mii_data;
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const struct mii_phydesc *mpd;
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mpd = mii_phy_match(ma, nsphys);
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aprint_naive(": Media interface\n");
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aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
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sc->mii_dev = self;
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sc->mii_inst = mii->mii_instance;
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sc->mii_phy = ma->mii_phyno;
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sc->mii_funcs = &nsphy_funcs;
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sc->mii_pdata = mii;
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sc->mii_flags = ma->mii_flags;
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mii_lock(mii);
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PHY_RESET(sc);
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PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
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sc->mii_capabilities &= ma->mii_capmask;
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mii_unlock(mii);
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mii_phy_add_media(sc);
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}
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static int
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nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
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{
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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uint16_t reg;
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KASSERT(mii_locked(mii));
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switch (cmd) {
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case MII_POLLSTAT:
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/* If we're not polling our PHY instance, just return. */
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if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)
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return 0;
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break;
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case MII_MEDIACHG:
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/*
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* If the media indicates a different PHY instance,
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* isolate ourselves.
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*/
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if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst) {
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PHY_READ(sc, MII_BMCR, ®);
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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return 0;
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}
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/* If the interface is not up, don't do anything. */
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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break;
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PHY_READ(sc, MII_NSPHY_PCR, ®);
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/*
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* Set up the PCR to use LED4 to indicate full-duplex
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* in both 10baseT and 100baseTX modes.
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*/
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reg |= PCR_LED4MODE;
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/*
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* Make sure Carrier Integrity Monitor function is
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* disabled (normal for Node operation, but sometimes
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* it's not set?!)
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*/
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reg |= PCR_CIMDIS;
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/*
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* Make sure "force link good" is set to normal mode.
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* It's only intended for debugging.
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*/
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reg |= PCR_FLINK100;
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/*
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* Mystery bits which are supposedly `reserved',
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* but we seem to need to set them when the PHY
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* is connected to some interfaces:
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*
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* 0x0400 is needed for fxp
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* (Intel EtherExpress Pro 10+/100B, 82557 chip)
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* (nsphy with a DP83840 chip)
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* 0x0100 may be needed for some other card
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*/
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reg |= 0x0100 | 0x0400;
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PHY_WRITE(sc, MII_NSPHY_PCR, reg);
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mii_phy_setmedia(sc);
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break;
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case MII_TICK:
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/* If we're not currently selected, just return. */
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if (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)
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return 0;
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if (mii_phy_tick(sc) == EJUSTRETURN)
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return 0;
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break;
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case MII_DOWN:
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mii_phy_down(sc);
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return 0;
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}
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/* Update the media status. */
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mii_phy_status(sc);
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/* Callback if something changed. */
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mii_phy_update(sc, cmd);
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return 0;
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}
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static void
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nsphy_status(struct mii_softc *sc)
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{
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struct mii_data *mii = sc->mii_pdata;
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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uint16_t bmsr, bmcr, aner, anar, par, anlpar, result;
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KASSERT(mii_locked(mii));
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mii->mii_media_status = IFM_AVALID;
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mii->mii_media_active = IFM_ETHER;
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PHY_READ(sc, MII_BMSR, &bmsr);
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PHY_READ(sc, MII_BMSR, &bmsr);
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if (bmsr & BMSR_LINK)
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mii->mii_media_status |= IFM_ACTIVE;
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PHY_READ(sc, MII_BMCR, &bmcr);
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if (bmcr & BMCR_ISO) {
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mii->mii_media_active |= IFM_NONE;
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mii->mii_media_status = 0;
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return;
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}
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if (bmcr & BMCR_LOOP)
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mii->mii_media_active |= IFM_LOOP;
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if (bmcr & BMCR_AUTOEN) {
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/*
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* The PAR status bits are only valid if autonegotiation
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* has completed (or it's disabled).
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*/
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if ((bmsr & BMSR_ACOMP) == 0) {
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/* Erg, still trying, I guess... */
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mii->mii_media_active |= IFM_NONE;
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return;
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}
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/*
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* Argh. The PAR doesn't seem to indicate duplex mode
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* properly! Determine media based on link partner's
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* advertised capabilities.
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*/
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PHY_READ(sc, MII_ANER, &aner);
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if (aner & ANER_LPAN) {
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PHY_READ(sc, MII_ANAR, &anar);
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PHY_READ(sc, MII_ANLPAR, &anlpar);
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result = anar & anlpar;
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if (result & ANLPAR_TX_FD)
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mii->mii_media_active |= IFM_100_TX | IFM_FDX;
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else if (result & ANLPAR_T4)
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mii->mii_media_active |= IFM_100_T4 | IFM_HDX;
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else if (result & ANLPAR_TX)
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mii->mii_media_active |= IFM_100_TX | IFM_HDX;
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else if (result & ANLPAR_10_FD)
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mii->mii_media_active |= IFM_10_T | IFM_FDX;
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else if (result & ANLPAR_10)
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mii->mii_media_active |= IFM_10_T | IFM_HDX;
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else
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mii->mii_media_active |= IFM_NONE;
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return;
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}
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/*
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* Link partner is not capable of autonegotiation.
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* We will never be in full-duplex mode if this is
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* the case, so reading the PAR is OK.
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*/
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PHY_READ(sc, MII_NSPHY_PAR, &par);
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if (par & PAR_10)
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mii->mii_media_active |= IFM_10_T;
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else
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mii->mii_media_active |= IFM_100_TX;
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mii->mii_media_active |= IFM_HDX;
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} else
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mii->mii_media_active = ife->ifm_media;
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}
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static void
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nsphy_reset(struct mii_softc *sc)
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{
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int i;
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uint16_t reg;
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KASSERT(mii_locked(sc->mii_pdata));
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if (sc->mii_flags & MIIF_NOISOLATE)
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reg = BMCR_RESET;
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else
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reg = BMCR_RESET | BMCR_ISO;
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PHY_WRITE(sc, MII_BMCR, reg);
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/*
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* Give it a little time to settle in case we just got power.
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* The DP83840A data sheet suggests that a soft reset not happen
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* within 500us of power being applied. Be conservative.
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*/
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delay(1000);
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/*
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* Wait another 2s for it to complete.
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* This is only a little overkill as under normal circumstances
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* the PHY can take up to 1s to complete reset.
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* This is also a bit odd because after a reset, the BMCR will
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* clear the reset bit and simply reports 0 even though the reset
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* is not yet complete.
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*/
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for (i = 0; i < 1000; i++) {
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PHY_READ(sc, MII_BMCR, ®);
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if (reg && ((reg & BMCR_RESET) == 0))
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break;
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delay(2000);
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}
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if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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}
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