freebsd-dev/sys/dev/mii/pnphy.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

277 lines
7.0 KiB
C

/*
* Copyright (c) 1997, 1998, 1999
* Bill Paul <wpaul@ee.columbia.edu>. 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.
*/
/*
* Pseudo-driver for media selection on the Lite-On PNIC 82c168
* chip. The NWAY support on this chip is horribly broken, so we
* only support manual mode selection. This is lame, but getting
* NWAY to work right is amazingly difficult.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.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_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <pci/if_dcreg.h>
#include "miibus_if.h"
#define DC_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | x)
#define DC_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~x)
static int pnphy_probe(device_t);
static int pnphy_attach(device_t);
static device_method_t pnphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, pnphy_probe),
DEVMETHOD(device_attach, pnphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t pnphy_devclass;
static driver_t pnphy_driver = {
"pnphy",
pnphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
static int pnphy_service(struct mii_softc *, struct mii_data *, int);
static void pnphy_status(struct mii_softc *);
static int
pnphy_probe(dev)
device_t dev;
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
/*
* The dc driver will report the 82c168 vendor and device
* ID to let us know that it wants us to attach.
*/
if (ma->mii_id1 != DC_VENDORID_LO ||
ma->mii_id2 != DC_DEVICEID_82C168)
return(ENXIO);
device_set_desc(dev, "PNIC 82c168 media interface");
return (0);
}
static int
pnphy_attach(dev)
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);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = pnphy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
mii->mii_instance++;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
sc->mii_capabilities =
BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
sc->mii_capabilities &= ma->mii_capmask;
device_printf(dev, " ");
mii_add_media(sc);
printf("\n");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
BMCR_ISO);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
BMCR_LOOP|BMCR_S100);
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int
pnphy_service(sc, mii, cmd)
struct mii_softc *sc;
struct mii_data *mii;
int cmd;
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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)
return (0);
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
sc->mii_flags = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
/* NWAY is busted on this chip */
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
case IFM_100_TX:
mii->mii_media_active = IFM_ETHER|IFM_100_TX;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mii->mii_media_active |= IFM_FDX;
MIIBUS_STATCHG(sc->mii_dev);
return(0);
case IFM_10_T:
mii->mii_media_active = IFM_ETHER|IFM_10_T;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mii->mii_media_active |= IFM_FDX;
MIIBUS_STATCHG(sc->mii_dev);
return(0);
default:
return(EINVAL);
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
break;
}
/* Update the media status. */
pnphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
pnphy_status(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
int reg;
struct dc_softc *dc_sc;
dc_sc = mii->mii_ifp->if_softc;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
reg = CSR_READ_4(dc_sc, DC_ISR);
if (!(reg & DC_ISR_LINKFAIL))
mii->mii_media_status |= IFM_ACTIVE;
if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_100_TX;
if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
mii->mii_media_active |= IFM_FDX;
return;
}