/*-
 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
 *
 * Copyright (c) 1998, 1999 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.
 *
 * 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.
 *
 * 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Driver for Altima AC101 10/100 PHY
 */

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

#include "miibus_if.h"

static int acphy_probe(device_t);
static int acphy_attach(device_t);

static device_method_t acphy_methods[] = {
	/* device interface */
	DEVMETHOD(device_probe,		acphy_probe),
	DEVMETHOD(device_attach,	acphy_attach),
	DEVMETHOD(device_detach,	mii_phy_detach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD_END
};

static devclass_t acphy_devclass;

static driver_t acphy_driver = {
	"acphy",
	acphy_methods,
	sizeof(struct mii_softc)
};

DRIVER_MODULE(acphy, miibus, acphy_driver, acphy_devclass, 0, 0);

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

static const struct mii_phydesc acphys[] = {
	MII_PHY_DESC(ALTIMA, AC101),
	MII_PHY_DESC(ALTIMA, AC101L),
	/* XXX This is reported to work, but it's not from any data sheet. */
	MII_PHY_DESC(ALTIMA, ACXXX),
	MII_PHY_END
};

static const struct mii_phy_funcs acphy_funcs = {
	acphy_service,
	acphy_status,
	acphy_reset
};

static int
acphy_probe(device_t dev)
{

	return (mii_phy_dev_probe(dev, acphys, BUS_PROBE_DEFAULT));
}

static int
acphy_attach(device_t dev)
{
	struct mii_softc *sc;

	sc = device_get_softc(dev);

	mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &acphy_funcs, 0);

	PHY_RESET(sc);

	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & sc->mii_capmask;
	device_printf(dev, " ");

#define	ADD(m)	ifmedia_add(&sc->mii_pdata->mii_media, (m), 0, NULL)
	if ((PHY_READ(sc, MII_ACPHY_MCTL) & AC_MCTL_FX_SEL) != 0) {
		sc->mii_flags |= MIIF_HAVEFIBER;
		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst));
		printf("100baseFX, ");
		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst));
		printf("100baseFX-FDX, ");
	}
#undef ADD

	mii_phy_add_media(sc);
	printf("\n");

	MIIBUS_MEDIAINIT(sc->mii_dev);
	return (0);
}

static int
acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
	int reg;

	switch (cmd) {
	case MII_POLLSTAT:
		break;

	case MII_MEDIACHG:
		/* Wake & deisolate up if necessary */
		reg = PHY_READ(sc, MII_BMCR);
		if (reg & (BMCR_ISO | BMCR_PDOWN))
			PHY_WRITE(sc, MII_BMCR, reg & ~(BMCR_ISO | BMCR_PDOWN));

		mii_phy_setmedia(sc);
		break;

	case MII_TICK:
		/*
		 * This PHY's autonegotiation doesn't need to be kicked.
		 */
		break;
	}

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

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

static 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, diag;

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

	bmsr = PHY_READ(sc, MII_BMSR) |
	    PHY_READ(sc, MII_BMSR);
	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) {
		if ((bmsr & BMSR_ACOMP) == 0) {
			/* Erg, still trying, I guess... */
			mii->mii_media_active |= IFM_NONE;
			return;
		}
		diag = PHY_READ(sc, MII_ACPHY_DIAG);
		if (diag & AC_DIAG_SPEED)
			mii->mii_media_active |= IFM_100_TX;
		else
			mii->mii_media_active |= IFM_10_T;

		if (diag & AC_DIAG_DUPLEX)
			mii->mii_media_active |=
			    IFM_FDX | mii_phy_flowstatus(sc);
		else
			mii->mii_media_active |= IFM_HDX;
	} else
		mii->mii_media_active = ife->ifm_media;
}

static void
acphy_reset(struct mii_softc *sc)
{

	mii_phy_reset(sc);
	PHY_WRITE(sc, MII_ACPHY_INT, 0);
}