409 lines
11 KiB
C
409 lines
11 KiB
C
/* $NetBSD: tlphy.c,v 1.72 2023/02/22 08:09:09 msaitoh 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 Texas Instruments's ThunderLAN PHYs
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tlphy.c,v 1.72 2023/02/22 08:09:09 msaitoh 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 <sys/bus.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_ether.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/tlphyreg.h>
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#include <dev/mii/tlphyvar.h>
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/* ThunderLAN PHY can only be on a ThunderLAN */
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#include <dev/pci/if_tlvar.h>
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struct tlphy_softc {
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struct mii_softc sc_mii; /* generic PHY */
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int sc_tlphycap;
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int sc_need_acomp;
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};
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static int tlphymatch(device_t, cfdata_t, void *);
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static void tlphyattach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(tlphy, sizeof(struct tlphy_softc),
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tlphymatch, tlphyattach, mii_phy_detach, mii_phy_activate);
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static int tlphy_service(struct mii_softc *, struct mii_data *, int);
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static int tlphy_auto(struct tlphy_softc *);
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static void tlphy_acomp(struct tlphy_softc *);
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static void tlphy_status(struct mii_softc *);
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static const struct mii_phy_funcs tlphy_funcs = {
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tlphy_service, tlphy_status, mii_phy_reset,
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};
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static const struct mii_phydesc tlphys[] = {
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MII_PHY_DESC(TI, TLAN10T),
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MII_PHY_END,
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};
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static int
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tlphymatch(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, tlphys) != 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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tlphyattach(device_t parent, device_t self, void *aux)
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{
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struct tlphy_softc *tsc = device_private(self);
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struct mii_softc *sc = &tsc->sc_mii;
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struct tl_softc *tlsc = device_private(device_parent(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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const char *sep = "";
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mpd = mii_phy_match(ma, tlphys);
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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 = &tlphy_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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/*
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* Note that if we're on a device that also supports 100baseTX, we are
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* not going to want to use the built-in 10baseT port, since there will
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* be another PHY on the MII wired up to the UTP connector. The parent
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* indicates this to us by specifying the TLPHY_MEDIA_NO_10_T bit.
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*/
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tsc->sc_tlphycap = tlsc->tl_product->tp_tlphymedia;
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if ((tsc->sc_tlphycap & TLPHY_MEDIA_NO_10_T) == 0) {
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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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} else
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sc->mii_capabilities = 0;
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mii_unlock(mii);
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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#define PRINT(str) \
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do { \
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aprint_normal("%s%s", sep, str); \
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sep = ", "; \
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} while (/* CONSTCOND */0)
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if (tsc->sc_tlphycap) {
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mii_lock(mii);
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sc->mii_anegticks = MII_ANEGTICKS;
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mii_unlock(mii);
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aprint_normal_dev(self, "");
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if (tsc->sc_tlphycap & TLPHY_MEDIA_10_2) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->mii_inst),
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0);
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PRINT("10base2");
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} else if (tsc->sc_tlphycap & TLPHY_MEDIA_10_5) {
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->mii_inst),
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0);
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PRINT("10base5");
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} else
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PRINT("no media present");
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aprint_normal("\n");
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}
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if (sc->mii_capabilities & BMSR_MEDIAMASK)
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mii_phy_add_media(sc);
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else {
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/*
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* mii_phy_add_media() automatically install power handler,
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* but if_media_add() doesn't. Do it now.
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*/
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if (!pmf_device_register(self, NULL, mii_phy_resume)) {
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aprint_error_dev(self,
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"couldn't establish power handler\n");
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}
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}
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#undef ADD
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#undef PRINT
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}
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static int
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tlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
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{
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struct tlphy_softc *tsc = (struct tlphy_softc *)sc;
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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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if ((sc->mii_flags & MIIF_DOINGAUTO) == 0 && tsc->sc_need_acomp)
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tlphy_acomp(tsc);
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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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switch (IFM_SUBTYPE(ife->ifm_media)) {
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case IFM_AUTO:
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(void) tlphy_auto(tsc);
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break;
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case IFM_10_2:
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case IFM_10_5:
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PHY_WRITE(sc, MII_BMCR, 0);
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PHY_WRITE(sc, MII_TLPHY_CTRL, CTRL_AUISEL);
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delay(100000);
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break;
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default:
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PHY_WRITE(sc, MII_TLPHY_CTRL, 0);
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delay(100000);
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mii_phy_setmedia(sc);
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}
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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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/*
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* XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?!
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*/
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/* Only used for autonegotiation. */
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if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
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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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* Check for link.
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* Read the status register twice; BMSR_LINK is latch-low.
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*/
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PHY_READ(sc, MII_BMSR, ®);
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PHY_READ(sc, MII_BMSR, ®);
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if (reg & BMSR_LINK) {
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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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* mii_ticks == 0 means it's the first tick after changing the
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* media or the link became down since the last tick
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* (see above), so break to update the status.
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*/
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if (sc->mii_ticks++ == 0)
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break;
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/* Only retry autonegotiation every mii_anegticks seconds. */
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KASSERT(sc->mii_anegticks != 0);
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if (sc->mii_ticks < sc->mii_anegticks)
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break;
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tlphy_auto(tsc);
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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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tlphy_status(struct mii_softc *sc)
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{
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struct tlphy_softc *tsc = (struct tlphy_softc *)sc;
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struct mii_data *mii = sc->mii_pdata;
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uint16_t bmsr, bmcr, tlctrl;
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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_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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PHY_READ(sc, MII_TLPHY_CTRL, &tlctrl);
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if (tlctrl & CTRL_AUISEL) {
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if (tsc->sc_tlphycap & TLPHY_MEDIA_10_2)
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mii->mii_media_active |= IFM_10_2;
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else if (tsc->sc_tlphycap & TLPHY_MEDIA_10_5)
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mii->mii_media_active |= IFM_10_5;
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else
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printf("%s: AUI selected with no matching media !\n",
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device_xname(sc->mii_dev));
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mii->mii_media_status |= IFM_ACTIVE;
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return;
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}
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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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if (bmcr & BMCR_LOOP)
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mii->mii_media_active |= IFM_LOOP;
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/*
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* Grr, braindead ThunderLAN PHY doesn't have any way to tell which
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* media is actually active. (Note it also doesn't self-configure
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* after autonegotiation.) We just have to report what's in the BMCR.
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*/
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if (bmcr & BMCR_FDX)
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mii->mii_media_active |= IFM_FDX;
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else
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mii->mii_media_active |= IFM_HDX;
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mii->mii_media_active |= IFM_10_T;
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}
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static int
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tlphy_auto(struct tlphy_softc *tsc)
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{
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struct mii_softc *sc = &tsc->sc_mii;
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int error;
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switch ((error = mii_phy_auto(sc))) {
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case EJUSTRETURN:
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/* Flag that we need to program when it completes. */
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tsc->sc_need_acomp = 1;
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break;
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default:
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tlphy_acomp(tsc);
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}
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return error;
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}
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static void
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tlphy_acomp(struct tlphy_softc *tsc)
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{
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struct mii_softc *sc = &tsc->sc_mii;
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uint16_t aner, anar, anlpar, result;
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tsc->sc_need_acomp = 0;
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/*
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* Grr, braindead ThunderLAN PHY doesn't self-configure
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* after autonegotiation. We have to do it ourselves
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* based on the link partner status.
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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 & ANAR_10_FD) {
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PHY_WRITE(sc, MII_BMCR, BMCR_FDX);
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return;
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}
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}
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PHY_WRITE(sc, MII_BMCR, 0);
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}
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