225 lines
5.4 KiB
C
225 lines
5.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2006 Benno Rice. 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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#include <sys/cdefs.h>
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/*
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* Driver for the SMSC LAN8710A
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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/socket.h>
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#include <sys/errno.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <machine/bus.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 "miidevs.h"
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#include "miibus_if.h"
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static int smscphy_probe(device_t);
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static int smscphy_attach(device_t);
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static int smscphy_service(struct mii_softc *, struct mii_data *, int);
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static void smscphy_auto(struct mii_softc *, int);
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static void smscphy_status(struct mii_softc *);
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static device_method_t smscphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, smscphy_probe),
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DEVMETHOD(device_attach, smscphy_attach),
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DEVMETHOD(device_detach, mii_phy_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD_END
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};
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static driver_t smscphy_driver = {
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"smscphy",
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smscphy_methods,
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sizeof(struct mii_softc)
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};
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DRIVER_MODULE(smscphy, miibus, smscphy_driver, 0, 0);
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static const struct mii_phydesc smscphys[] = {
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MII_PHY_DESC(SMC, LAN8710A),
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MII_PHY_DESC(SMC, LAN8700),
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MII_PHY_END
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};
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static const struct mii_phy_funcs smscphy_funcs = {
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smscphy_service,
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smscphy_status,
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mii_phy_reset
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};
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static int
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smscphy_probe(device_t dev)
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{
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return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT));
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}
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static int
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smscphy_attach(device_t dev)
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{
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struct mii_softc *sc;
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const struct mii_phy_funcs *mpf;
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sc = device_get_softc(dev);
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mpf = &smscphy_funcs;
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mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
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mii_phy_setmedia(sc);
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return (0);
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}
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static int
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smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
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{
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struct ifmedia_entry *ife;
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int reg;
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ife = mii->mii_media.ifm_cur;
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switch (cmd) {
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case MII_POLLSTAT:
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break;
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case MII_MEDIACHG:
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switch (IFM_SUBTYPE(ife->ifm_media)) {
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case IFM_AUTO:
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smscphy_auto(sc, ife->ifm_media);
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break;
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default:
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mii_phy_setmedia(sc);
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break;
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}
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break;
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case MII_TICK:
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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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/* I have no idea why BMCR_ISO gets set. */
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reg = PHY_READ(sc, MII_BMCR);
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if (reg & BMCR_ISO) {
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PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
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}
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reg = PHY_READ(sc, MII_BMSR) | 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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if (++sc->mii_ticks <= MII_ANEGTICKS) {
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break;
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}
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sc->mii_ticks = 0;
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PHY_RESET(sc);
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smscphy_auto(sc, ife->ifm_media);
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break;
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}
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/* Update the media status. */
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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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smscphy_auto(struct mii_softc *sc, int media)
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{
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uint16_t anar;
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anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
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if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
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anar |= ANAR_FC;
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PHY_WRITE(sc, MII_ANAR, anar);
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/* Apparently this helps. */
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anar = PHY_READ(sc, MII_ANAR);
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PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
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}
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static void
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smscphy_status(struct mii_softc *sc)
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{
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struct mii_data *mii;
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uint32_t bmcr, bmsr, status;
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mii = sc->mii_pdata;
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mii->mii_media_status = IFM_AVALID;
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mii->mii_media_active = IFM_ETHER;
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bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
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if ((bmsr & BMSR_LINK) != 0)
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mii->mii_media_status |= IFM_ACTIVE;
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bmcr = PHY_READ(sc, MII_BMCR);
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if ((bmcr & BMCR_ISO) != 0) {
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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) != 0)
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mii->mii_media_active |= IFM_LOOP;
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if ((bmcr & BMCR_AUTOEN) != 0) {
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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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status = PHY_READ(sc, 0x1F);
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if (status & 0x0008)
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mii->mii_media_active |= IFM_100_TX;
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else
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mii->mii_media_active |= IFM_10_T;
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if (status & 0x0010)
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mii->mii_media_active |= 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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}
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