freebsd-dev/sys/dev/mii/ruephy.c
Shunsuke Akiyama 11e04b0528 Add RealTek RTL8150 USB to fast Ethernet controller driver.
This driver now supports the Melco LUA-KTX and the GREEN HOUSE
GH-USB100B.

Reviewed by:	imp
MFC after:	2 weeks
2003-05-03 10:16:56 +00:00

298 lines
7.0 KiB
C

/*-
* Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@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, 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.
*
* $FreeBSD$
*/
/*
* driver for RealTek RTL8150 internal PHY
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <machine/bus.h>
#include <dev/mii/ruephyreg.h>
#include "miibus_if.h"
static int ruephy_probe(device_t);
static int ruephy_attach(device_t);
static device_method_t ruephy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ruephy_probe),
DEVMETHOD(device_attach, ruephy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t ruephy_devclass;
static driver_t ruephy_driver = {
"ruephy",
ruephy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0);
static int ruephy_service(struct mii_softc *, struct mii_data *, int);
static void ruephy_reset(struct mii_softc *);
static void ruephy_status(struct mii_softc *);
static int
ruephy_probe(device_t dev)
{
struct mii_attach_args *ma;
device_t parent;
ma = device_get_ivars(dev);
parent = device_get_parent(device_get_parent(dev));
/*
* RealTek RTL8150 PHY doesn't have vendor/device ID registers:
* the rue driver fakes up a return value of all zeros.
*/
if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
MII_MODEL(ma->mii_id2) != 0)
return (ENXIO);
/*
* Make sure the parent is an 'rue'.
*/
if (strcmp(device_get_name(parent), "rue") != 0)
return (ENXIO);
device_set_desc(dev, "RealTek RTL8150 internal media interface");
return (0);
}
static int
ruephy_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);
/*
* The RealTek PHY can never be isolated, so never allow non-zero
* instances!
*/
if (mii->mii_instance != 0) {
device_printf(dev, "ignoring this PHY, non-zero instance\n");
return (ENXIO);
}
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = ruephy_service;
sc->mii_pdata = mii;
mii->mii_instance++;
sc->mii_flags |= MIIF_NOISOLATE;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
ruephy_reset(sc);
sc->mii_capabilities =
PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
/*
* We can't isolate the RealTek RTL8150 PHY,
* so it has to be the only one!
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
panic("ruephy_service: can't isolate RealTek RTL8150 PHY");
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_AUTO:
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
return (0);
(void) mii_phy_auto(sc);
break;
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
default:
/*
* BMCR data is stored in the ifmedia entry.
*/
PHY_WRITE(sc, MII_ANAR,
mii_anar(ife->ifm_media));
PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
}
break;
case MII_TICK:
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
break;
/*
* Check to see if we have link. If we do, we don't
* need to restart the autonegotiation process. Read
* the MSR twice in case it's latched.
*/
reg = PHY_READ(sc, RUEPHY_MII_MSR) |
PHY_READ(sc, RUEPHY_MII_MSR);
if (reg & RUEPHY_MSR_LINK)
break;
/*
* Only retry autonegotiation every 5 seconds.
*/
if (++sc->mii_ticks != 5)
return (0);
sc->mii_ticks = 0;
ruephy_reset(sc);
if (mii_phy_auto(sc) == EJUSTRETURN)
return (0);
break;
}
/* Update the media status. */
ruephy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
ruephy_reset(struct mii_softc *sc)
{
mii_phy_reset(sc);
/*
* XXX RealTek RTL8150 PHY doesn't set the BMCR properly after
* XXX reset, which breaks autonegotiation.
*/
PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX));
}
static void
ruephy_status(struct mii_softc *phy)
{
struct mii_data *mii = phy->mii_pdata;
int bmsr, bmcr, msr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR);
if (msr & RUEPHY_MSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(phy, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
if (bmcr & BMCR_AUTOEN) {
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if (msr & RUEPHY_MSR_SPEED100)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (msr & RUEPHY_MSR_DUPLEX)
mii->mii_media_active |= IFM_FDX;
} else
mii->mii_media_active = mii_media_from_bmcr(bmcr);
}