19ca58475e
Remove unused variables. Add XXX comment where a break may be missing. [lxtphy.c] Found by: FlexeLint
277 lines
7.0 KiB
C
277 lines
7.0 KiB
C
/*
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* Copyright (c) 1997, 1998, 1999
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* Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Pseudo-driver for media selection on the Lite-On PNIC 82c168
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* chip. The NWAY support on this chip is horribly broken, so we
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* only support manual mode selection. This is lame, but getting
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* NWAY to work right is amazingly difficult.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include "miidevs.h"
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#include <machine/bus_pio.h>
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#include <machine/bus_memio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <pci/if_dcreg.h>
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#include "miibus_if.h"
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#define DC_SETBIT(sc, reg, x) \
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CSR_WRITE_4(sc, reg, \
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CSR_READ_4(sc, reg) | x)
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#define DC_CLRBIT(sc, reg, x) \
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CSR_WRITE_4(sc, reg, \
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CSR_READ_4(sc, reg) & ~x)
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static int pnphy_probe(device_t);
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static int pnphy_attach(device_t);
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static device_method_t pnphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, pnphy_probe),
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DEVMETHOD(device_attach, pnphy_attach),
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DEVMETHOD(device_detach, mii_phy_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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{ 0, 0 }
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};
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static devclass_t pnphy_devclass;
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static driver_t pnphy_driver = {
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"pnphy",
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pnphy_methods,
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sizeof(struct mii_softc)
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};
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DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
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static int pnphy_service(struct mii_softc *, struct mii_data *, int);
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static void pnphy_status(struct mii_softc *);
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static int
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pnphy_probe(dev)
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device_t dev;
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{
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struct mii_attach_args *ma;
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ma = device_get_ivars(dev);
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/*
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* The dc driver will report the 82c168 vendor and device
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* ID to let us know that it wants us to attach.
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*/
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if (ma->mii_id1 != DC_VENDORID_LO ||
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ma->mii_id2 != DC_DEVICEID_82C168)
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return(ENXIO);
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device_set_desc(dev, "PNIC 82c168 media interface");
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return (0);
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}
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static int
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pnphy_attach(dev)
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device_t dev;
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{
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struct mii_softc *sc;
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struct mii_attach_args *ma;
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struct mii_data *mii;
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sc = device_get_softc(dev);
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ma = device_get_ivars(dev);
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sc->mii_dev = device_get_parent(dev);
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mii = device_get_softc(sc->mii_dev);
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LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
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sc->mii_inst = mii->mii_instance;
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sc->mii_phy = ma->mii_phyno;
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sc->mii_service = pnphy_service;
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sc->mii_pdata = mii;
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sc->mii_flags |= MIIF_NOISOLATE;
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mii->mii_instance++;
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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sc->mii_capabilities =
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BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
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sc->mii_capabilities &= ma->mii_capmask;
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device_printf(dev, " ");
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mii_add_media(sc);
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printf("\n");
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
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BMCR_ISO);
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
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BMCR_LOOP|BMCR_S100);
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#undef ADD
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MIIBUS_MEDIAINIT(sc->mii_dev);
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return(0);
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}
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static int
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pnphy_service(sc, mii, cmd)
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struct mii_softc *sc;
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struct mii_data *mii;
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int cmd;
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{
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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switch (cmd) {
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case MII_POLLSTAT:
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/*
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* If we're not polling our PHY instance, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
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return (0);
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}
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break;
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case MII_MEDIACHG:
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/*
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* If the media indicates a different PHY instance,
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* isolate ourselves.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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return (0);
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/*
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* If the interface is not up, don't do anything.
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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break;
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sc->mii_flags = 0;
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switch (IFM_SUBTYPE(ife->ifm_media)) {
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case IFM_AUTO:
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/* NWAY is busted on this chip */
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case IFM_100_T4:
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/*
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* XXX Not supported as a manual setting right now.
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*/
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return (EINVAL);
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case IFM_100_TX:
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mii->mii_media_active = IFM_ETHER|IFM_100_TX;
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if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
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mii->mii_media_active |= IFM_FDX;
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MIIBUS_STATCHG(sc->mii_dev);
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return(0);
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case IFM_10_T:
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mii->mii_media_active = IFM_ETHER|IFM_10_T;
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if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
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mii->mii_media_active |= IFM_FDX;
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MIIBUS_STATCHG(sc->mii_dev);
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return(0);
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default:
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return(EINVAL);
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}
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break;
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case MII_TICK:
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/*
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* If we're not currently selected, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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return (0);
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/*
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* Is the interface even up?
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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return (0);
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break;
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}
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/* Update the media status. */
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pnphy_status(sc);
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/* Callback if something changed. */
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mii_phy_update(sc, cmd);
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return (0);
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}
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static void
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pnphy_status(sc)
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struct mii_softc *sc;
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{
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struct mii_data *mii = sc->mii_pdata;
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int reg;
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struct dc_softc *dc_sc;
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dc_sc = mii->mii_ifp->if_softc;
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mii->mii_media_status = IFM_AVALID;
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mii->mii_media_active = IFM_ETHER;
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reg = CSR_READ_4(dc_sc, DC_ISR);
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if (!(reg & DC_ISR_LINKFAIL))
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mii->mii_media_status |= IFM_ACTIVE;
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if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
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mii->mii_media_active |= IFM_10_T;
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else
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mii->mii_media_active |= IFM_100_TX;
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if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
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mii->mii_media_active |= IFM_FDX;
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return;
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}
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