text: /*
   * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   * NASA Ames Research Center.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *      This product includes software developed by the NetBSD
   *      Foundation, Inc. and its contributors.
   * 4. Neither the name of The NetBSD Foundation nor the names of its
   *    contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *      This product includes software developed by Manuel Bouyer.
   * 4. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *	from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
   *
   * $FreeBSD: src/sys/dev/mii/bmtphy.c,v 1.2 2002/10/29 00:20:47 semenu Exp $
   */
  
  /*
   * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
   * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
   * the 3c905C data sheet.
   */
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/kernel.h>
  #include <sys/socket.h>
  #include <sys/bus.h>
  
  #include <net/if.h>
  #include <net/if_media.h>
  
  #include <dev/mii/mii.h>
  #include <dev/mii/miivar.h>
  #include <dev/mii/miidevs.h>
  
  #include <dev/mii/bmtphyreg.h>
  
  #include "miibus_if.h"
  
  static int	bmtphy_probe(device_t);
  static int	bmtphy_attach(device_t);
  
  static device_method_t bmtphy_methods[] = {
  	/* Device interface */
  	DEVMETHOD(device_probe,		bmtphy_probe),
  	DEVMETHOD(device_attach,	bmtphy_attach),
  	DEVMETHOD(device_detach,	mii_phy_detach),
  	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
  
  	{ 0, 0 }
  };
  
  static devclass_t	bmtphy_devclass;
  
  static driver_t	bmtphy_driver = {
  	"bmtphy",
  	bmtphy_methods,
  	sizeof(struct mii_softc)
  };
  
  DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
  
  static int	bmtphy_service(struct mii_softc *, struct mii_data *, int);
  static void	bmtphy_status(struct mii_softc *);
  
  static int
  bmtphy_probe(device_t dev)
  {
  	struct	mii_attach_args *ma;
  	int	rval;
  
  	ma = device_get_ivars(dev);
  	rval = 0;
  
  	if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_BROADCOM)
  		return (ENXIO);
  
  	switch (MII_MODEL(ma->mii_id2)) {
  	case MII_MODEL_BROADCOM_3C905B:
  		device_set_desc(dev, MII_STR_BROADCOM_3C905B);
  		rval = -10;	/* Let exphy take precedence. */
  		break;
  	case MII_MODEL_BROADCOM_3C905C:
  		device_set_desc(dev, MII_STR_BROADCOM_3C905C);
  		rval = -10;	/* Let exphy take precedence. */
  		break;
  	case MII_MODEL_BROADCOM_BCM5201:
  		device_set_desc(dev, MII_STR_BROADCOM_BCM5201);
  		break;
  	case MII_MODEL_BROADCOM_BCM5221:
  		device_set_desc(dev, MII_STR_BROADCOM_BCM5221);
  		break;
  	default:
  		return (ENXIO);
  		break;
  	}
  
  	return (rval);
  }
  
  static int
  bmtphy_attach(device_t dev)
  {
  	struct	mii_softc *sc;
  	struct	mii_attach_args *ma;
  	struct	mii_data *mii;
  
  	sc = device_get_softc(dev);
  	ma = device_get_ivars(dev);
  	sc->mii_dev = device_get_parent(dev);
  	mii = device_get_softc(sc->mii_dev);
  	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  
  	sc->mii_inst = mii->mii_instance;
  	sc->mii_phy = ma->mii_phyno;
  	sc->mii_service = bmtphy_service;
  	sc->mii_pdata = mii;
  
  	mii_phy_reset(sc);
  
  	mii->mii_instance++;
  
  	sc->mii_capabilities =
  	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  	device_printf(dev, " ");
  	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  		printf("no media present");
  	else
  		mii_phy_add_media(sc);
  
  	printf("\n");
  
  	MIIBUS_MEDIAINIT(sc->mii_dev);
  
  	return (0);
  }
  
  static int
  bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  {
  	struct	ifmedia_entry *ife;
  	int	reg;
  
  	ife = mii->mii_media.ifm_cur;
  
  	switch (cmd) {
  	case MII_POLLSTAT:
  		/*
  		 * If we're not polling our PHY instance, just return.
  		 */
  		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  			return (0);
  		break;
  
  	case MII_MEDIACHG:
  		/*
  		 * If the media indicates a different PHY instance,
  		 * isolate ourselves.
  		 */
  		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  			reg = PHY_READ(sc, MII_BMCR);
  			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  			return (0);
  		}
  
  		/*
  		 * If the interface is not up, don't do anything.
  		 */
  		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  			break;
  
  		mii_phy_setmedia(sc);
  		break;
  
  	case MII_TICK:
  		/*
  		 * If we're not currently selected, just return.
  		 */
  		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  			return (0);
  		if (mii_phy_tick(sc) == EJUSTRETURN)
  			return (0);
  		break;
  	}
  
  	/* Update the media status. */
  	bmtphy_status(sc);
  
  	/* Callback if something changed. */
  	mii_phy_update(sc, cmd);
  
  	return (0);
  }
  
  static void
  bmtphy_status(struct mii_softc *sc)
  {
  	struct	mii_data *mii;
  	struct	ifmedia_entry *ife;
  	int	bmsr, bmcr, aux_csr;
  
  	mii = sc->mii_pdata;
  	ife = mii->mii_media.ifm_cur;
  
  	mii->mii_media_status = IFM_AVALID;
  	mii->mii_media_active = IFM_ETHER;
  
  	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  	aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
  
  	if (bmsr & BMSR_LINK)
  		mii->mii_media_status |= IFM_ACTIVE;
  
  	bmcr = PHY_READ(sc, MII_BMCR);
  	if (bmcr & BMCR_ISO) {
  		mii->mii_media_active |= IFM_NONE;
  		mii->mii_media_status = 0;
  		return;
  	}
  
  	if (bmcr & BMCR_LOOP)
  		mii->mii_media_active |= IFM_LOOP;
  
  	if (bmcr & BMCR_AUTOEN) {
  		/*
  		 * The media status bits are only valid if autonegotiation
  		 * has completed (or it's disabled).
  		 */
  		if ((bmsr & BMSR_ACOMP) == 0) {
  			/* Erg, still trying, I guess... */
  			mii->mii_media_active |= IFM_NONE;
  			return;
  		}
  
  		if (aux_csr & AUX_CSR_SPEED)
  			mii->mii_media_active |= IFM_100_TX;
  		else
  			mii->mii_media_active |= IFM_10_T;
  		if (aux_csr & AUX_CSR_FDX)
  			mii->mii_media_active |= IFM_FDX;
  	} else
  		mii->mii_media_active = ife->ifm_media;
  }
  