freebsd-dev/sys/dev/mii/nsgphy.c
Poul-Henning Kamp 19ca58475e Remove unnecessary breaks.
Remove unused variables.
Add XXX comment where a break may be missing. [lxtphy.c]

Found by:       FlexeLint
2003-05-31 19:48:33 +00:00

283 lines
7.4 KiB
C

/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 2001
* Bill Paul <wpaul@bsdi.com>. All rights reserved.
* Copyright (c) 1998, 1999, 2000, 2001 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.
* 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.
*/
/*
* Driver for the National Semiconductor DP83891 and DP83861
* 10/100/1000 PHYs.
* Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
*
* The DP83891 is the older NatSemi gigE PHY which isn't being sold
* anymore. The DP83861 is its replacement, which is an 'enhanced'
* firmware driven component. The major difference between the
* two is that the 83891 can't generate interrupts, while the
* 83861 can. (I think it wasn't originally designed to do this, but
* it can now thanks to firmware updates.) The 83861 also allows
* access to its internal RAM via indirect register access.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <machine/clock.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/nsgphyreg.h>
#include "miibus_if.h"
static int nsgphy_probe(device_t);
static int nsgphy_attach(device_t);
static device_method_t nsgphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, nsgphy_probe),
DEVMETHOD(device_attach, nsgphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t nsgphy_devclass;
static driver_t nsgphy_driver = {
"nsgphy",
nsgphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0);
static int nsgphy_service(struct mii_softc *, struct mii_data *,int);
static void nsgphy_status(struct mii_softc *);
const struct mii_phydesc gphyters[] = {
{ MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83861,
MII_STR_NATSEMI_DP83861 },
{ MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83891,
MII_STR_NATSEMI_DP83891 },
{ 0, 0,
NULL },
};
static int
nsgphy_probe(device_t dev)
{
struct mii_attach_args *ma;
const struct mii_phydesc *mpd;
ma = device_get_ivars(dev);
mpd = mii_phy_match(ma, gphyters);
if (mpd != NULL) {
device_set_desc(dev, mpd->mpd_name);
return(0);
}
return(ENXIO);
}
static int
nsgphy_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);
if (bootverbose)
device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2));
device_printf(dev, " ");
sc->mii_dev = device_get_parent(dev);
mii = device_get_softc(sc->mii_dev);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = nsgphy_service;
sc->mii_pdata = mii;
sc->mii_anegticks = 5;
mii->mii_instance++;
sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) |
(BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask;
if (sc->mii_capabilities & BMSR_EXTSTAT)
sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
mii_phy_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int
nsgphy_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;
}
/* Update the media status. */
nsgphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
nsgphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmsr, bmcr, physup, gtsr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
if (physup & PHY_SUP_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;
}
switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) {
case PHY_SUP_SPEED1:
mii->mii_media_active |= IFM_1000_T;
gtsr = PHY_READ(sc, MII_100T2SR);
if (gtsr & GTSR_MS_RES)
mii->mii_media_active |= IFM_ETH_MASTER;
break;
case PHY_SUP_SPEED0:
mii->mii_media_active |= IFM_100_TX;
break;
case 0:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
}
if (physup & PHY_SUP_DUPLEX)
mii->mii_media_active |= IFM_FDX;
} else
mii->mii_media_active = ife->ifm_media;
}