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/*-
* Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org>
* 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 unmodified, 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 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Driver for the RDC Semiconductor R6040 10/100 PHY.
*/
#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/rdcphyreg.h>
#include "miibus_if.h"
static device_probe_t rdcphy_probe;
static device_attach_t rdcphy_attach;
struct rdcphy_softc {
struct mii_softc mii_sc;
int mii_link_tick;
#define RDCPHY_MANNEG_TICK 3
};
static device_method_t rdcphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, rdcphy_probe),
DEVMETHOD(device_attach, rdcphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t rdcphy_devclass;
static driver_t rdcphy_driver = {
"rdcphy",
rdcphy_methods,
sizeof(struct rdcphy_softc)
};
DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, rdcphy_devclass, 0, 0);
static int rdcphy_service(struct mii_softc *, struct mii_data *, int);
static void rdcphy_status(struct mii_softc *);
static const struct mii_phydesc rdcphys[] = {
MII_PHY_DESC(RDC, R6040),
MII_PHY_END
};
static const struct mii_phy_funcs rdcphy_funcs = {
rdcphy_service,
rdcphy_status,
mii_phy_reset
};
static int
rdcphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT));
}
static int
rdcphy_attach(device_t dev)
{
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1);
return (0);
}
static int
rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct rdcphy_softc *rsc;
struct ifmedia_entry *ife;
rsc = (struct rdcphy_softc *)sc;
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;
mii_phy_setmedia(sc);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_100_TX:
case IFM_10_T:
/*
* Report fake lost link event to parent
* driver. This will stop MAC of parent
* driver and make it possible to reconfigure
* MAC after completion of link establishment.
* Note, the parent MAC seems to require
* restarting MAC when underlying any PHY
* configuration was changed even if the
* resolved speed/duplex was not changed at
* all.
*/
mii->mii_media_status = 0;
mii->mii_media_active = IFM_ETHER | IFM_NONE;
rsc->mii_link_tick = RDCPHY_MANNEG_TICK;
/* Immediately report link down. */
mii_phy_update(sc, MII_MEDIACHG);
return (0);
default:
break;
}
break;
case MII_TICK:
if (mii_phy_tick(sc) == EJUSTRETURN)
return (0);
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
/*
* It seems the PHY hardware does not correctly
* report link status changes when manual link
* configuration is in progress. It is also
* possible for the PHY to complete establishing
* a link within one second such that mii(4)
* did not notice the link change. To workaround
* the issue, emulate lost link event and wait
* for 3 seconds when manual link configuration
* is in progress. 3 seconds would be long
* enough to absorb transient link flips.
*/
if (rsc->mii_link_tick > 0) {
rsc->mii_link_tick--;
return (0);
}
}
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
rdcphy_status(struct mii_softc *sc)
{
struct mii_data *mii;
struct ifmedia_entry *ife;
int bmsr, bmcr, physts;
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);
physts = PHY_READ(sc, MII_RDCPHY_STATUS);
if ((physts & STATUS_LINK_UP) != 0)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if ((bmcr & BMCR_ISO) != 0) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if ((bmcr & BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
if ((bmcr & BMCR_AUTOEN) != 0) {
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
switch (physts & STATUS_SPEED_MASK) {
case STATUS_SPEED_100:
mii->mii_media_active |= IFM_100_TX;
break;
case STATUS_SPEED_10:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
if ((physts & STATUS_FULL_DUPLEX) != 0)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
}
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