351 lines
9.0 KiB
C
351 lines
9.0 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 RealTek 8139 internal PHYs
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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/bus.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include <dev/mii/miidevs.h>
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#include <machine/bus.h>
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#include <pci/if_rlreg.h>
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#include "miibus_if.h"
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#if !defined(lint)
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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static int rlphy_probe (device_t);
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static int rlphy_attach (device_t);
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static device_method_t rlphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, rlphy_probe),
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DEVMETHOD(device_attach, rlphy_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 rlphy_devclass;
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static driver_t rlphy_driver = {
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"rlphy",
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rlphy_methods,
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sizeof(struct mii_softc)
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};
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DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0);
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static int rlphy_service(struct mii_softc *, struct mii_data *, int);
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static void rlphy_status(struct mii_softc *);
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static int rlphy_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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/* Test for RealTek 8201L PHY */
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if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK &&
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MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) {
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device_set_desc(dev, MII_STR_REALTEK_RTL8201L);
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return(0);
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}
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/*
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* RealTek PHY doesn't have vendor/device ID registers:
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* the rl driver fakes up a return value of all zeros.
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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 an `rl'.
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*/
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if (strcmp(device_get_name(parent), "rl") != 0)
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return (ENXIO);
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device_set_desc(dev, "RealTek internal media interface");
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return (0);
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}
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static int rlphy_attach(dev)
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device_t dev;
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{
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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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sc = device_get_softc(dev);
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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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/*
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* The RealTek PHY can never be isolated, so never allow non-zero
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* instances!
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*/
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if (mii->mii_instance != 0) {
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device_printf(dev, "ignoring this PHY, non-zero instance\n");
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return(ENXIO);
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}
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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 = rlphy_service;
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sc->mii_pdata = mii;
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mii->mii_instance++;
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sc->mii_flags |= MIIF_NOISOLATE;
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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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mii_phy_reset(sc);
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sc->mii_capabilities =
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PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
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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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rlphy_service(sc, mii, cmd)
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struct mii_softc *sc;
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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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/*
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* We can't isolate the RealTek PHY, so it has to be the only one!
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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panic("rlphy_service: can't isolate RealTek PHY");
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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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/*
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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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* If we're already in auto mode, just return.
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*/
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if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
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return (0);
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(void) mii_phy_auto(sc);
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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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/*
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* BMCR data is stored in the ifmedia entry.
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*/
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PHY_WRITE(sc, MII_ANAR,
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mii_anar(ife->ifm_media));
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PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
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}
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break;
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case MII_TICK:
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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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* The RealTek PHY's autonegotiation doesn't need to be
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* kicked; it continues in the background.
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*/
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break;
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}
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/* Update the media status. */
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rlphy_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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rlphy_status(phy)
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struct mii_softc *phy;
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{
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struct mii_data *mii = phy->mii_pdata;
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int bmsr, bmcr, anlpar;
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device_t parent;
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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(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
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if (bmsr & BMSR_LINK)
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mii->mii_media_status |= IFM_ACTIVE;
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bmcr = PHY_READ(phy, MII_BMCR);
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if (bmcr & BMCR_ISO) {
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mii->mii_media_active |= IFM_NONE;
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mii->mii_media_status = 0;
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return;
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}
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if (bmcr & BMCR_LOOP)
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mii->mii_media_active |= IFM_LOOP;
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if (bmcr & BMCR_AUTOEN) {
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/*
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* NWay autonegotiation takes the highest-order common
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* bit of the ANAR and ANLPAR (i.e. best media advertised
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* both by us and our link partner).
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*/
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if ((bmsr & BMSR_ACOMP) == 0) {
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/* Erg, still trying, I guess... */
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mii->mii_media_active |= IFM_NONE;
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return;
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}
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if ((anlpar = PHY_READ(phy, MII_ANAR) &
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PHY_READ(phy, MII_ANLPAR))) {
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if (anlpar & ANLPAR_T4)
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mii->mii_media_active |= IFM_100_T4;
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else if (anlpar & ANLPAR_TX_FD)
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mii->mii_media_active |= IFM_100_TX|IFM_FDX;
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else if (anlpar & ANLPAR_TX)
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mii->mii_media_active |= IFM_100_TX;
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else if (anlpar & ANLPAR_10_FD)
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mii->mii_media_active |= IFM_10_T|IFM_FDX;
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else if (anlpar & ANLPAR_10)
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mii->mii_media_active |= IFM_10_T;
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else
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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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* If the other side doesn't support NWAY, then the
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* best we can do is determine if we have a 10Mbps or
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* 100Mbps link. There's no way to know if the link
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* is full or half duplex, so we default to half duplex
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* and hope that the user is clever enough to manually
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* change the media settings if we're wrong.
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*/
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/*
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* The RealTek PHY supports non-NWAY link speed
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* detection, however it does not report the link
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* detection results via the ANLPAR or BMSR registers.
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* (What? RealTek doesn't do things the way everyone
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* else does? I'm just shocked, shocked I tell you.)
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* To determine the link speed, we have to do one
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* of two things:
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*
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* - If this is a standalone RealTek RTL8201(L) PHY,
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* we can determine the link speed by testing bit 0
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* in the magic, vendor-specific register at offset
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* 0x19.
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*
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* - If this is a RealTek MAC with integrated PHY, we
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* can test the 'SPEED10' bit of the MAC's media status
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* register.
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*/
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parent = device_get_parent(phy->mii_dev);
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if (strcmp(device_get_name(parent), "rl") != 0) {
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if (PHY_READ(phy, 0x0019) & 0x01)
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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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} else {
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if (PHY_READ(phy, RL_MEDIASTAT) &
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RL_MEDIASTAT_SPEED10)
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mii->mii_media_active |= IFM_10_T;
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else
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mii->mii_media_active |= IFM_100_TX;
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}
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} else
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mii->mii_media_active = mii_media_from_bmcr(bmcr);
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}
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