432 lines
11 KiB
C
432 lines
11 KiB
C
/*
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* Copyright (c) 1997, 1998, 1999
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* Bill Paul <wpaul@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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* $FreeBSD$
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*/
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/*
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* driver for Micro Linear 6692 PHYs
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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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#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/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.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 "miibus_if.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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int ml_state;
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int ml_linked;
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};
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static int mlphy_probe (device_t);
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static int mlphy_attach (device_t);
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static device_method_t mlphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, mlphy_probe),
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DEVMETHOD(device_attach, mlphy_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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{ 0, 0 }
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};
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static devclass_t mlphy_devclass;
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static driver_t mlphy_driver = {
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"mlphy",
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mlphy_methods,
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sizeof(struct mlphy_softc)
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};
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DRIVER_MODULE(mlphy, miibus, mlphy_driver, mlphy_devclass, 0, 0);
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static int mlphy_service(struct mii_softc *, struct mii_data *, int);
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static void mlphy_reset(struct mii_softc *);
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static void mlphy_status(struct mii_softc *);
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static int mlphy_probe(dev)
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device_t dev;
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{
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struct mii_attach_args *ma;
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device_t parent;
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ma = device_get_ivars(dev);
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parent = device_get_parent(device_get_parent(dev));
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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 (ENXIO);
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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(device_get_name(parent), "tl") != 0)
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return (ENXIO);
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device_set_desc(dev, "Micro Linear 6692 media interface");
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return (0);
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}
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static int mlphy_attach(dev)
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device_t dev;
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{
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struct mlphy_softc *msc;
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struct mii_softc *sc;
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struct mii_attach_args *ma;
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struct mii_data *mii;
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msc = device_get_softc(dev);
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sc = &msc->ml_mii;
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ma = device_get_ivars(dev);
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sc->mii_dev = device_get_parent(dev);
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mii = device_get_softc(sc->mii_dev);
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LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
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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_service = mlphy_service;
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sc->mii_pdata = mii;
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mii->mii_instance++;
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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#if 0 /* See above. */
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
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BMCR_ISO);
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#endif
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
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BMCR_LOOP|BMCR_S100);
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sc->mii_flags &= ~MIIF_NOISOLATE;
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mii_phy_reset(sc);
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sc->mii_flags |= MIIF_NOISOLATE;
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sc->mii_capabilities =
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PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
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ma->mii_capmask = ~sc->mii_capabilities;
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device_printf(dev, " ");
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mii_add_media(sc);
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printf("\n");
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#undef ADD
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MIIBUS_MEDIAINIT(sc->mii_dev);
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return(0);
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}
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static int
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mlphy_service(xsc, mii, cmd)
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struct mii_softc *xsc;
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struct mii_data *mii;
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int cmd;
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{
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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int reg;
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struct mii_softc *other = NULL;
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struct mlphy_softc *msc = (struct mlphy_softc *)xsc;
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struct mii_softc *sc = (struct mii_softc *)&msc->ml_mii;
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device_t *devlist;
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int devs, i;
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/*
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* See if there's another PHY on this bus with us.
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* If so, we may need it for 10Mbps modes.
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*/
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device_get_children(msc->ml_mii.mii_dev, &devlist, &devs);
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for (i = 0; i < devs; i++) {
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if (strcmp(device_get_name(devlist[i]), "mlphy")) {
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other = device_get_softc(devlist[i]);
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break;
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}
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}
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free(devlist, M_TEMP);
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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 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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reg = 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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/*
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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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/*
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* For autonegotiation, reset and isolate the
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* companion PHY (if any) and then do NWAY
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* autonegotiation ourselves.
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*/
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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);
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msc->ml_linked = 0;
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return(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 program 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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*
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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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PHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media));
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PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
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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 program 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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PHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media));
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PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
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msc->ml_state = 0;
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break;
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case IFM_100_T4:
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/*
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* XXX Not supported as a manual setting right now.
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*/
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return (EINVAL);
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default:
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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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/*
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* If we're not currently selected, 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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/*
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* Is the interface even up?
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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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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 != 5)
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return (0);
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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);
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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) {
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int other_inst;
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other_inst = other->mii_inst;
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other->mii_inst = sc->mii_inst;
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(void) (*other->mii_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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/*
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* The Micro Linear PHY comes out of reset with the 'autoneg
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* enable' bit set, which we don't want.
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*/
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static void mlphy_reset(sc)
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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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return;
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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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static void mlphy_status(sc)
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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 = msc->ml_mii.mii_pdata;
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struct mii_softc *other = NULL;
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device_t *devlist;
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int devs, i;
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/* See if there's another PHY on the bus with us. */
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device_get_children(msc->ml_mii.mii_dev, &devlist, &devs);
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for (i = 0; i < devs; i++) {
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if (strcmp(device_get_name(devlist[i]), "mlphy")) {
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other = device_get_softc(devlist[i]);
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break;
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}
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}
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free(devlist, M_TEMP);
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if (other == NULL)
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return;
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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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mii_phy_reset(other);
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PHY_WRITE(other, MII_BMCR, BMCR_ISO);
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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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mii_phy_reset(other);
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mii_phy_auto(other);
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}
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return;
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}
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