/*-
 * 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
 *
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/mii/bmtphy.c,v 1.9 2005/01/06 01:42:55 imp 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/module.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 "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;
	case MII_MODEL_BROADCOM_BCM4401:
		device_set_desc(dev, MII_STR_BROADCOM_BCM4401);
		break;
	default:
		return (ENXIO);
	}

	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;
}
