xref: /freebsd-10.0-release/sys/dev/mii/pnaphy.c

/*-
 * Copyright (c) 2000 Berkeley Software Design, Inc.
 * Copyright (c) 1997, 1998, 1999, 2000
 *	Bill Paul <wpaul@osd.bsdi.com>.  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 Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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 homePNA PHYs
 * This is really just a stub that allows us to identify homePNA-based
 * transceicers and display the link status. MII-based homePNA PHYs
 * only support one media type and no autonegotiation. If we were
 * really clever, we could tweak some of the vendor-specific registers
 * to optimize the link.
 */

#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 "miibus_if.h"

static int pnaphy_probe(device_t);
static int pnaphy_attach(device_t);

static device_method_t pnaphy_methods[] = {
	/* device interface */
	DEVMETHOD(device_probe,		pnaphy_probe),
	DEVMETHOD(device_attach,	pnaphy_attach),
	DEVMETHOD(device_detach,	mii_phy_detach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD_END
};

static devclass_t pnaphy_devclass;

static driver_t pnaphy_driver = {
	"pnaphy",
	pnaphy_methods,
	sizeof(struct mii_softc)
};

DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);

static int	pnaphy_service(struct mii_softc *, struct mii_data *,int);

static const struct mii_phydesc pnaphys[] = {
	MII_PHY_DESC(yyAMD, 79c901home),
	MII_PHY_END
};

static const struct mii_phy_funcs pnaphy_funcs = {
	pnaphy_service,
	ukphy_status,
	mii_phy_reset
};

static int
pnaphy_probe(device_t dev)
{

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

static int
pnaphy_attach(device_t dev)
{

	mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_IS_HPNA |
	   MIIF_NOMANPAUSE, &pnaphy_funcs, 1);
	return (0);
}

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

	switch (cmd) {
	case MII_POLLSTAT:
		break;

	case MII_MEDIACHG:
		/*
		 * If the interface is not up, don't do anything.
		 */
		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
			break;

		switch (IFM_SUBTYPE(ife->ifm_media)) {
		case IFM_HPNA_1:
			mii_phy_setmedia(sc);
			break;
		default:
			return (EINVAL);
		}
		break;

	case MII_TICK:
		if (mii_phy_tick(sc) == EJUSTRETURN)
			return (0);
		break;
	}

	/* Update the media status. */
	PHY_STATUS(sc);
	if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
		mii->mii_media_active = IFM_ETHER | IFM_HPNA_1;

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