The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/dc/pnphy.c

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    1 /*
    2  * Copyright (c) 1997, 1998, 1999
    3  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/8.3/sys/dev/dc/pnphy.c 230718 2012-01-29 01:35:14Z marius $");
   35 
   36 /*
   37  * Pseudo-driver for media selection on the Lite-On PNIC 82c168
   38  * chip.  The NWAY support on this chip is horribly broken, so we
   39  * only support manual mode selection.  This is lame, but getting
   40  * NWAY to work right is amazingly difficult.
   41  */
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/kernel.h>
   46 #include <sys/socket.h>
   47 #include <sys/errno.h>
   48 #include <sys/lock.h>
   49 #include <sys/module.h>
   50 #include <sys/mutex.h>
   51 #include <sys/bus.h>
   52 
   53 #include <net/if.h>
   54 #include <net/if_arp.h>
   55 #include <net/if_media.h>
   56 
   57 #include <dev/mii/mii.h>
   58 #include <dev/mii/miivar.h>
   59 #include "miidevs.h"
   60 
   61 #include <machine/bus.h>
   62 #include <machine/resource.h>
   63 #include <sys/bus.h>
   64 
   65 #include <dev/dc/if_dcreg.h>
   66 
   67 #include "miibus_if.h"
   68 
   69 static int pnphy_probe(device_t);
   70 static int pnphy_attach(device_t);
   71 
   72 static device_method_t pnphy_methods[] = {
   73         /* device interface */
   74         DEVMETHOD(device_probe,         pnphy_probe),
   75         DEVMETHOD(device_attach,        pnphy_attach),
   76         DEVMETHOD(device_detach,        mii_phy_detach),
   77         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   78         DEVMETHOD_END
   79 };
   80 
   81 static devclass_t pnphy_devclass;
   82 
   83 static driver_t pnphy_driver = {
   84         "pnphy",
   85         pnphy_methods,
   86         sizeof(struct mii_softc)
   87 };
   88 
   89 DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
   90 
   91 static int      pnphy_service(struct mii_softc *, struct mii_data *, int);
   92 static void     pnphy_status(struct mii_softc *);
   93 
   94 static int
   95 pnphy_probe(device_t dev)
   96 {
   97         struct mii_attach_args *ma;
   98 
   99         ma = device_get_ivars(dev);
  100 
  101         /*
  102          * The dc driver will report the 82c168 vendor and device
  103          * ID to let us know that it wants us to attach.
  104          */
  105         if (ma->mii_id1 != DC_VENDORID_LO ||
  106             ma->mii_id2 != DC_DEVICEID_82C168)
  107                 return (ENXIO);
  108 
  109         device_set_desc(dev, "PNIC 82c168 media interface");
  110 
  111         return (BUS_PROBE_DEFAULT);
  112 }
  113 
  114 static int
  115 pnphy_attach(device_t dev)
  116 {
  117         struct mii_softc *sc;
  118         struct mii_attach_args *ma;
  119         struct mii_data *mii;
  120 
  121         sc = device_get_softc(dev);
  122         ma = device_get_ivars(dev);
  123         sc->mii_dev = device_get_parent(dev);
  124         mii = ma->mii_data;
  125         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  126 
  127         sc->mii_flags = miibus_get_flags(dev);
  128         sc->mii_inst = mii->mii_instance++;
  129         sc->mii_phy = ma->mii_phyno;
  130         sc->mii_service = pnphy_service;
  131         sc->mii_pdata = mii;
  132 
  133         /*
  134          * Apparently, we can neither isolate nor do loopback.
  135          */
  136         sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP | MIIF_NOMANPAUSE;
  137 
  138         sc->mii_capabilities =
  139             BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
  140         sc->mii_capabilities &= ma->mii_capmask;
  141         device_printf(dev, " ");
  142         mii_phy_add_media(sc);
  143         printf("\n");
  144 
  145         MIIBUS_MEDIAINIT(sc->mii_dev);
  146         return (0);
  147 }
  148 
  149 static int
  150 pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  151 {
  152         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  153 
  154         switch (cmd) {
  155         case MII_POLLSTAT:
  156                 break;
  157 
  158         case MII_MEDIACHG:
  159                 /*
  160                  * If the interface is not up, don't do anything.
  161                  */
  162                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  163                         break;
  164 
  165                 /*
  166                  * Note that auto-negotiation is broken on this chip.
  167                  */
  168                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  169                 case IFM_100_TX:
  170                         mii->mii_media_active = IFM_ETHER | IFM_100_TX;
  171                         if ((ife->ifm_media & IFM_FDX) != 0)
  172                                 mii->mii_media_active |= IFM_FDX;
  173                         MIIBUS_STATCHG(sc->mii_dev);
  174                         return (0);
  175                 case IFM_10_T:
  176                         mii->mii_media_active = IFM_ETHER | IFM_10_T;
  177                         if ((ife->ifm_media & IFM_FDX) != 0)
  178                                 mii->mii_media_active |= IFM_FDX;
  179                         MIIBUS_STATCHG(sc->mii_dev);
  180                         return (0);
  181                 default:
  182                         return (EINVAL);
  183                 }
  184                 break;
  185 
  186         case MII_TICK:
  187                 /*
  188                  * Is the interface even up?
  189                  */
  190                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  191                         return (0);
  192 
  193                 break;
  194         }
  195 
  196         /* Update the media status. */
  197         pnphy_status(sc);
  198 
  199         /* Callback if something changed. */
  200         mii_phy_update(sc, cmd);
  201         return (0);
  202 }
  203 
  204 static void
  205 pnphy_status(struct mii_softc *sc)
  206 {
  207         struct mii_data *mii = sc->mii_pdata;
  208         int reg;
  209         struct dc_softc         *dc_sc;
  210 
  211         dc_sc = mii->mii_ifp->if_softc;
  212 
  213         mii->mii_media_status = IFM_AVALID;
  214         mii->mii_media_active = IFM_ETHER;
  215 
  216         reg = CSR_READ_4(dc_sc, DC_ISR);
  217         if (!(reg & DC_ISR_LINKFAIL))
  218                 mii->mii_media_status |= IFM_ACTIVE;
  219         reg = CSR_READ_4(dc_sc, DC_NETCFG);
  220         if (reg & DC_NETCFG_SPEEDSEL)
  221                 mii->mii_media_active |= IFM_10_T;
  222         else
  223                 mii->mii_media_active |= IFM_100_TX;
  224         if (reg & DC_NETCFG_FULLDUPLEX)
  225                 mii->mii_media_active |= IFM_FDX;
  226         else
  227                 mii->mii_media_active |= IFM_HDX;
  228 }

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