399 lines
12 KiB
C
399 lines
12 KiB
C
/* $OpenBSD: mlphy.c,v 1.6 2022/04/06 18:59:29 naddy Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 1999
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* Bill Paul <wpaul <at> ctr.columbia.edu>. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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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
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*-
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* Copyright (c) 1998, 1999 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, and by Frank van der Linden.
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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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* Micro Linear 6692 PHY
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*
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* The Micro Linear 6692 is a strange beast, and dealing with it using
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* this code framework is tricky. The 6692 is actually a 100Mbps-only
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* device, which means that a second PHY is required to support 10Mbps
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* modes. However, even though the 6692 does not support 10Mbps modes,
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* it can still advertise them when performing autonegotiation. If a
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* 10Mbps mode is negotiated, we must program the registers of the
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* companion PHY accordingly in addition to programming the registers
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* of the 6692.
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*
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* This device also does not have vendor/device ID registers.
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*
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*/
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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_var.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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#define ML_STATE_AUTO_SELF 1
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#define ML_STATE_AUTO_OTHER 2
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struct mlphy_softc {
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struct mii_softc ml_mii;
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struct device *ml_dev;
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int ml_state;
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int ml_linked;
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};
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int mlphy_probe(struct device *, void *, void *);
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void mlphy_attach(struct device *, struct device *, void *);
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const struct cfattach mlphy_ca = {
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sizeof(struct mii_softc), mlphy_probe, mlphy_attach, mii_phy_detach
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};
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struct cfdriver mlphy_cd = {
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NULL, "mlphy", DV_DULL
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};
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void mlphy_reset(struct mii_softc *);
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int mlphy_service(struct mii_softc *, struct mii_data *, int);
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void mlphy_status(struct mii_softc *);
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const struct mii_phy_funcs mlphy_funcs = {
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mlphy_service, mlphy_status, mlphy_reset,
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};
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int
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mlphy_probe(struct device *parent, void *match, void *aux)
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{
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struct mii_attach_args *ma = aux;
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/*
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* Micro Linear PHY reports oui == 0 model == 0
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*/
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if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
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MII_MODEL(ma->mii_id2) != 0)
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return (0);
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/*
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* Make sure the parent is a `tl'. So far, I have only
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* encountered the 6692 on an Olicom card with a ThunderLAN
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* controller chip.
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*/
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if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "tl") != 0)
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return (0);
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return (10);
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}
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void
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mlphy_attach(struct device *parent, struct device *self, void *aux)
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{
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struct mlphy_softc *msc = (struct mlphy_softc *)self;
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struct mii_softc *sc = (struct mii_softc *)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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printf(": ML6692 100baseTX PHY\n");
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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 = &mlphy_funcs;
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sc->mii_pdata = mii;
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sc->mii_flags = ma->mii_flags;
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msc->ml_dev = parent;
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PHY_RESET(sc);
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sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
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MII_MEDIA_100_TX);
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ma->mii_capmask = ~sc->mii_capabilities;
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#undef ADD
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if(sc->mii_capabilities & BMSR_MEDIAMASK)
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mii_phy_add_media(sc);
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}
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int
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mlphy_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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struct mii_softc *other = NULL;
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struct mlphy_softc *msc = (struct mlphy_softc *)sc;
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int other_inst, reg;
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LIST_FOREACH(other, &mii->mii_phys, mii_list)
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if (other != sc)
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break;
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if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
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return (ENXIO);
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switch (cmd) {
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case MII_POLLSTAT:
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/*
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* If we're not polling our PHY instance, just return.
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*/
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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 interface is not up, don't do anything.
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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break;
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switch (IFM_SUBTYPE(ife->ifm_media)) {
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case IFM_AUTO:
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msc->ml_state = ML_STATE_AUTO_SELF;
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if (other != NULL) {
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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, BMCR_ISO);
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}
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(void)mii_phy_auto(sc, 0);
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msc->ml_linked = 0;
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break;
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case IFM_10_T:
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/*
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* For 10baseT modes, reset and program the
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* companion PHY (of any), then setup ourselves
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* to match. This will put us in pass-through
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* mode and let the companion PHY do all the
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* work.
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* BMCR data is stored in the ifmedia entry.
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*/
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if (other != NULL) {
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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, ife->ifm_data);
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}
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mii_phy_setmedia(sc);
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msc->ml_state = 0;
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break;
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case IFM_100_TX:
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/*
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* For 100baseTX modes, reset and isolate the
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* companion PHY (if any), then setup ourselves
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* accordingly.
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*
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* BMCR data is stored in the ifmedia entry.
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*/
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if (other != NULL) {
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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, BMCR_ISO);
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}
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mii_phy_setmedia(sc);
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msc->ml_state = 0;
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break;
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default:
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return (EINVAL);
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}
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break;
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case MII_TICK:
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/*
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* If interface is not up, don't do anything
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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return (0);
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/*
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* Only used for autonegotiation.
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*/
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if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
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break;
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/*
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* Check to see if we have link. If we do, we don't
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* need to restart the autonegotiation process. Read
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* the BMSR twice in case it's latched.
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* If we're in a 10Mbps mode, check the link of the
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* 10Mbps PHY. Sometimes the Micro Linear PHY's
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* linkstat bit will clear while the linkstat bit of
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* the companion PHY will remain set.
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*/
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if (msc->ml_state == ML_STATE_AUTO_OTHER) {
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reg = PHY_READ(other, MII_BMSR) |
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PHY_READ(other, MII_BMSR);
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} else {
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reg = PHY_READ(sc, MII_BMSR) |
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PHY_READ(sc, MII_BMSR);
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}
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if (reg & BMSR_LINK) {
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if (!msc->ml_linked) {
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msc->ml_linked = 1;
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mlphy_status(sc);
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}
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sc->mii_ticks = 0;
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break;
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}
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/*
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* Only retry autonegotiation every 5 seconds.
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*/
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if (++sc->mii_ticks <= MII_ANEGTICKS)
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break;
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sc->mii_ticks = 0;
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msc->ml_linked = 0;
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mii->mii_media_active = IFM_NONE;
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mii_phy_reset(sc);
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msc->ml_state = ML_STATE_AUTO_SELF;
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if (other != NULL) {
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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, BMCR_ISO);
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}
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mii_phy_auto(sc, 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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if (msc->ml_state == ML_STATE_AUTO_OTHER && other != NULL) {
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other_inst = other->mii_inst;
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other->mii_inst = sc->mii_inst;
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if (IFM_INST(ife->ifm_media) == other->mii_inst)
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(void) PHY_SERVICE(other, mii, MII_POLLSTAT);
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other->mii_inst = other_inst;
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sc->mii_media_active = other->mii_media_active;
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sc->mii_media_status = other->mii_media_status;
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} else
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ukphy_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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void
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mlphy_reset(struct mii_softc *sc)
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{
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int reg;
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mii_phy_reset(sc);
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reg = PHY_READ(sc, MII_BMCR);
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reg &= ~BMCR_AUTOEN;
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PHY_WRITE(sc, MII_BMCR, reg);
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}
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/*
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* If we negotiate a 10Mbps mode, we need to check for an alternate
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* PHY and make sure it's enabled and set correctly.
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*/
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void
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mlphy_status(struct mii_softc *sc)
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{
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struct mlphy_softc *msc = (struct mlphy_softc *)sc;
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struct mii_data *mii = sc->mii_pdata;
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struct mii_softc *other = NULL;
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/* See if there's another PHY on the bus with us. */
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LIST_FOREACH(other, &mii->mii_phys, mii_list)
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if (other != sc)
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break;
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ukphy_status(sc);
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if (IFM_SUBTYPE(mii->mii_media_active) != IFM_10_T) {
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msc->ml_state = ML_STATE_AUTO_SELF;
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if (other != NULL) {
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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, BMCR_ISO);
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}
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}
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if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) {
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msc->ml_state = ML_STATE_AUTO_OTHER;
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mlphy_reset(&msc->ml_mii);
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PHY_WRITE(&msc->ml_mii, MII_BMCR, BMCR_ISO);
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if (other != NULL) {
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mii_phy_reset(other);
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mii_phy_auto(other, 1);
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}
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}
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}
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