/*	$OpenBSD: acphy.c,v 1.6 2006/12/27 19:11:08 kettenis Exp $	*/
/*	$NetBSD: acphy.c,v 1.13 2003/04/29 01:49:33 thorpej Exp $	*/

/*
 * Copyright 2001 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
 *
 * 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 for the NetBSD Project by
 *	Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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.
 */

/*
 * Driver for the Altima AC101 PHY.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/errno.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/acphyreg.h>

int	acphymatch(struct device *, void *, void *);
void	acphyattach(struct device *, struct device *, void *);

struct cfattach acphy_ca = {
	sizeof(struct mii_softc), acphymatch, acphyattach, mii_phy_detach,
	    mii_phy_activate
};

struct cfdriver acphy_cd = {
	NULL, "acphy", DV_DULL
};

int	acphy_service(struct mii_softc *, struct mii_data *, int);
void	acphy_status(struct mii_softc *);

const struct mii_phy_funcs acphy_funcs = {
	acphy_service, acphy_status, mii_phy_reset,
};

static const struct mii_phydesc acphys[] = {
	{ MII_OUI_xxALTIMA,		MII_MODEL_xxALTIMA_AC101,
	  MII_STR_xxALTIMA_AC101 },
	{ MII_OUI_xxALTIMA,		MII_MODEL_xxALTIMA_AC101L,
	  MII_STR_xxALTIMA_AC101L },
	{ MII_OUI_xxALTIMA,		MII_MODEL_xxALTIMA_AC_UNKNOWN,
	  MII_STR_xxALTIMA_AC_UNKNOWN },

	{ 0,				0,
	  NULL },
};

int
acphymatch(struct device *parent, void *match, void *aux)
{
	struct mii_attach_args *ma = aux;

	if (mii_phy_match(ma, acphys) != NULL)
		return (10);

	return (0);
}

void
acphyattach(struct device *parent, struct device *self, void *aux)
{
	struct mii_softc *sc = (struct mii_softc *)self;
	struct mii_attach_args *ma = aux;
	struct mii_data *mii = ma->mii_data;
	const struct mii_phydesc *mpd;

	mpd = mii_phy_match(ma, acphys);
	printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));

	sc->mii_inst = mii->mii_instance;
	sc->mii_phy = ma->mii_phyno;
	sc->mii_funcs = &acphy_funcs;
	sc->mii_pdata = mii;
	sc->mii_flags = ma->mii_flags;
	sc->mii_anegticks = MII_ANEGTICKS;

	PHY_RESET(sc);

	/*
	 * XXX Check MCR_FX_SEL to set MIIF_HAVE_FIBER?
	 */

	sc->mii_capabilities =
	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;

#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
	if (sc->mii_flags & MIIF_HAVEFIBER) {
		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
		    MII_MEDIA_100_TX);
		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
		    MII_MEDIA_100_TX);
	}
#undef ADD

	if (sc->mii_capabilities & BMSR_MEDIAMASK)
		mii_phy_add_media(sc);
}

int
acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
	int reg;

	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;

	case MII_DOWN:
		mii_phy_down(sc);
		return (0);
	}

	/* Update the media status. */
	mii_phy_status(sc);

	/* Callback if something changed. */
	mii_phy_update(sc, cmd);
	return (0);
}

void
acphy_status(struct mii_softc *sc)
{
	struct mii_data *mii = sc->mii_pdata;
	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
	int bmsr, bmcr, dr;

	mii->mii_media_status = IFM_AVALID;
	mii->mii_media_active = IFM_ETHER;

	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
	dr = PHY_READ(sc, MII_ACPHY_DR);

	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 (dr & DR_SPEED)
			mii->mii_media_active |= IFM_100_TX;
		else
			mii->mii_media_active |= IFM_10_T;

		if (dr & DR_DPLX)
			mii->mii_media_active |= IFM_FDX;
		else
			mii->mii_media_active |= IFM_HDX;
	} else
		mii->mii_media_active = ife->ifm_media;
}
