334 lines
9.6 KiB
C
334 lines
9.6 KiB
C
/* $NetBSD: gphyter.c,v 1.37 2020/03/15 23:04:50 thorpej Exp $ */
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/*-
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* Copyright (c) 1998, 1999, 2000, 2001 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 DP83891, DP83861 and DP83865
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* `Gig PHYTER' ethernet 10/100/1000 PHYs. The DP83891 is an older,
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* non-firmware-driven version of the DP83861. The DP83865 is a low
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* power version of the DP83861.
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*
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* Data Sheets available from www.national.com:
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* http://www.national.com/ds/DP/DP83861.pdf
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* http://www.national.com/ds/DP/DP83865.pdf
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: gphyter.c,v 1.37 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/gphyterreg.h>
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static int gphytermatch(device_t, cfdata_t, void *);
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static void gphyterattach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(gphyter, sizeof(struct mii_softc),
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gphytermatch, gphyterattach, mii_phy_detach, mii_phy_activate);
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static int gphyter_service(struct mii_softc *, struct mii_data *, int);
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static void gphyter_status(struct mii_softc *);
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static void gphyter_reset(struct mii_softc *);
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static const struct mii_phy_funcs gphyter_funcs = {
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gphyter_service, gphyter_status, gphyter_reset,
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};
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static const struct mii_phydesc gphyters[] = {
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MII_PHY_DESC(xxNATSEMI, DP83861),
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MII_PHY_DESC(xxNATSEMI, DP83865),
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MII_PHY_DESC(xxNATSEMI, DP83891),
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MII_PHY_END,
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};
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static int
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gphytermatch(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, gphyters) != 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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gphyterattach(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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uint16_t anar, strap;
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mpd = mii_phy_match(ma, gphyters);
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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 = &gphyter_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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if (sc->mii_capabilities & BMSR_EXTSTAT)
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PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities);
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/*
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* The Gig PHYTER seems to have the 10baseT BMSR bits hard-wired to 0,
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* even though the device supports 10baseT. What we do instead is read
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* the post-reset ANAR, who's 10baseT-related bits are set by strapping
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* pin 180, and fake the BMSR bits.
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*/
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PHY_READ(sc, MII_ANAR, &anar);
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if (anar & ANAR_10)
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sc->mii_capabilities |= (BMSR_10THDX & ma->mii_capmask);
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if (anar & ANAR_10_FD)
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sc->mii_capabilities |= (BMSR_10TFDX & ma->mii_capmask);
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mii_unlock(mii);
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mii_phy_add_media(sc);
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mii_lock(mii);
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PHY_READ(sc, MII_GPHYTER_STRAP, &strap);
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mii_unlock(mii);
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aprint_normal_dev(self, "strapped to %s mode",
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(strap & STRAP_MS_VAL) ? "master" : "slave");
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if (strap & STRAP_NC_MODE)
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aprint_normal(", pre-C5 BCM5400 compat enabled");
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aprint_normal("\n");
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}
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static int
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gphyter_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 (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 (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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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 (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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gphyter_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, physup, gtsr;
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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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PHY_READ(sc, MII_GPHYTER_PHY_SUP, &physup);
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if (physup & PHY_SUP_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 media 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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switch (physup & (PHY_SUP_SPEED1 | PHY_SUP_SPEED0)) {
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case PHY_SUP_SPEED1:
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mii->mii_media_active |= IFM_1000_T;
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PHY_READ(sc, MII_100T2SR, >sr);
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if (gtsr & GTSR_MS_RES)
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mii->mii_media_active |= IFM_ETH_MASTER;
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break;
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case PHY_SUP_SPEED0:
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mii->mii_media_active |= IFM_100_TX;
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break;
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case 0:
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mii->mii_media_active |= IFM_10_T;
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break;
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default:
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mii->mii_media_active |= IFM_NONE;
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mii->mii_media_status = 0;
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}
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if (physup & PHY_SUP_DUPLEX)
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mii->mii_media_active |=
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IFM_FDX | mii_phy_flowstatus(sc);
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else
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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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void
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gphyter_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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* It is best to allow a little time for the reset to settle in before
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* we start polling the BMCR again. Notably, the DP83840A manual
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* states that there should be a 500us delay between asserting software
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* reset and attempting MII serial operations. Also, a DP83815 can get
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* into a bad state on cable removal and reinsertion if we do not
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* delay here.
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*/
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delay(500);
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/* Wait another 100ms for it to complete. */
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for (i = 0; i < 100; i++) {
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PHY_READ(sc, MII_BMCR, ®);
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if ((reg & BMCR_RESET) == 0)
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break;
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delay(1000);
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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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