nsgphy.c

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    1 /*-
    2  * Copyright (c) 2001 Wind River Systems
    3  * Copyright (c) 2001
    4  *      Bill Paul <wpaul@bsdi.com>.  All rights reserved.
    5  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *      This product includes software developed by Bill Paul.
   23  * 4. Neither the name of the author nor the names of any co-contributors
   24  *    may be used to endorse or promote products derived from this software
   25  *    without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   30  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   37  * THE POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 #include <sys/cdefs.h>
   41 __FBSDID("$FreeBSD$");
   42 
   43 /*
   44  * Driver for the National Semiconductor DP83891 and DP83861
   45  * 10/100/1000 PHYs.
   46  * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
   47  *
   48  * The DP83891 is the older NatSemi gigE PHY which isn't being sold
   49  * anymore. The DP83861 is its replacement, which is an 'enhanced'
   50  * firmware driven component. The major difference between the
   51  * two is that the 83891 can't generate interrupts, while the
   52  * 83861 can. (I think it wasn't originally designed to do this, but
   53  * it can now thanks to firmware updates.) The 83861 also allows
   54  * access to its internal RAM via indirect register access.
   55  */
   56 
   57 #include <sys/param.h>
   58 #include <sys/systm.h>
   59 #include <sys/kernel.h>
   60 #include <sys/module.h>
   61 #include <sys/socket.h>
   62 #include <sys/bus.h>
   63 
   64 #include <net/if.h>
   65 #include <net/if_media.h>
   66 
   67 #include <dev/mii/mii.h>
   68 #include <dev/mii/miivar.h>
   69 #include "miidevs.h"
   70 
   71 #include <dev/mii/nsgphyreg.h>
   72 
   73 #include "miibus_if.h"
   74 
   75 static int nsgphy_probe(device_t);
   76 static int nsgphy_attach(device_t);
   77 
   78 static device_method_t nsgphy_methods[] = {
   79         /* device interface */
   80         DEVMETHOD(device_probe,         nsgphy_probe),
   81         DEVMETHOD(device_attach,        nsgphy_attach),
   82         DEVMETHOD(device_detach,        mii_phy_detach),
   83         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   84         { 0, 0 }
   85 };
   86 
   87 static devclass_t nsgphy_devclass;
   88 
   89 static driver_t nsgphy_driver = {
   90         "nsgphy",
   91         nsgphy_methods,
   92         sizeof(struct mii_softc)
   93 };
   94 
   95 DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0);
   96 
   97 static int      nsgphy_service(struct mii_softc *, struct mii_data *,int);
   98 static void     nsgphy_status(struct mii_softc *);
   99 
  100 static const struct mii_phydesc nsgphys[] = {
  101         MII_PHY_DESC(NATSEMI, DP83861),
  102         MII_PHY_DESC(NATSEMI, DP83891),
  103         MII_PHY_END
  104 };
  105 
  106 static int
  107 nsgphy_probe(device_t dev)
  108 {
  109 
  110         return (mii_phy_dev_probe(dev, nsgphys, BUS_PROBE_DEFAULT));
  111 }
  112 
  113 static int
  114 nsgphy_attach(device_t dev)
  115 {
  116         struct mii_softc *sc;
  117         struct mii_attach_args *ma;
  118         struct mii_data *mii;
  119 
  120         sc = device_get_softc(dev);
  121         ma = device_get_ivars(dev);
  122         if (bootverbose)
  123                 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2));
  124         device_printf(dev, " ");
  125         sc->mii_dev = device_get_parent(dev);
  126         mii = device_get_softc(sc->mii_dev);
  127         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  128 
  129         sc->mii_inst = mii->mii_instance;
  130         sc->mii_phy = ma->mii_phyno;
  131         sc->mii_service = nsgphy_service;
  132         sc->mii_pdata = mii;
  133 
  134         mii->mii_instance++;
  135 
  136         sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) |
  137             (BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask;
  138         if (sc->mii_capabilities & BMSR_EXTSTAT)
  139                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  140 
  141         mii_phy_add_media(sc);
  142         printf("\n");
  143 
  144         MIIBUS_MEDIAINIT(sc->mii_dev);
  145         return (0);
  146 }
  147 
  148 static int
  149 nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  150 {
  151         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  152         int reg;
  153 
  154         switch (cmd) {
  155         case MII_POLLSTAT:
  156                 /*
  157                  * If we're not polling our PHY instance, just return.
  158                  */
  159                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  160                         return (0);
  161                 break;
  162 
  163         case MII_MEDIACHG:
  164                 /*
  165                  * If the media indicates a different PHY instance,
  166                  * isolate ourselves.
  167                  */
  168                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  169                         reg = PHY_READ(sc, MII_BMCR);
  170                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  171                         return (0);
  172                 }
  173 
  174                 /*
  175                  * If the interface is not up, don't do anything.
  176                  */
  177                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  178                         break;
  179 
  180                 mii_phy_setmedia(sc);
  181                 break;
  182 
  183         case MII_TICK:
  184                 /*
  185                  * If we're not currently selected, just return.
  186                  */
  187                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  188                         return (0);
  189 
  190                 if (mii_phy_tick(sc) == EJUSTRETURN)
  191                         return (0);
  192                 break;
  193         }
  194 
  195         /* Update the media status. */
  196         nsgphy_status(sc);
  197 
  198         /* Callback if something changed. */
  199         mii_phy_update(sc, cmd);
  200         return (0);
  201 }
  202 
  203 static void
  204 nsgphy_status(struct mii_softc *sc)
  205 {
  206         struct mii_data *mii = sc->mii_pdata;
  207         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  208         int bmsr, bmcr, physup, gtsr;
  209 
  210         mii->mii_media_status = IFM_AVALID;
  211         mii->mii_media_active = IFM_ETHER;
  212 
  213         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  214 
  215         physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
  216 
  217         if (physup & PHY_SUP_LINK)
  218                 mii->mii_media_status |= IFM_ACTIVE;
  219 
  220         bmcr = PHY_READ(sc, MII_BMCR);
  221         if (bmcr & BMCR_ISO) {
  222                 mii->mii_media_active |= IFM_NONE;
  223                 mii->mii_media_status = 0;
  224                 return;
  225         }
  226 
  227         if (bmcr & BMCR_LOOP)
  228                 mii->mii_media_active |= IFM_LOOP;
  229 
  230         if (bmcr & BMCR_AUTOEN) {
  231                 /*
  232                  * The media status bits are only valid if autonegotiation
  233                  * has completed (or it's disabled).
  234                  */
  235                 if ((bmsr & BMSR_ACOMP) == 0) {
  236                         /* Erg, still trying, I guess... */
  237                         mii->mii_media_active |= IFM_NONE;
  238                         return;
  239                 }
  240 
  241                 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) {
  242                 case PHY_SUP_SPEED1:
  243                         mii->mii_media_active |= IFM_1000_T;
  244                         gtsr = PHY_READ(sc, MII_100T2SR);
  245                         if (gtsr & GTSR_MS_RES)
  246                                 mii->mii_media_active |= IFM_ETH_MASTER;
  247                         break;
  248 
  249                 case PHY_SUP_SPEED0:
  250                         mii->mii_media_active |= IFM_100_TX;
  251                         break;
  252 
  253                 case 0:
  254                         mii->mii_media_active |= IFM_10_T;
  255                         break;
  256 
  257                 default:
  258                         mii->mii_media_active |= IFM_NONE;
  259                         mii->mii_media_status = 0;
  260                 }
  261                 if (physup & PHY_SUP_DUPLEX)
  262                         mii->mii_media_active |= IFM_FDX;
  263         } else
  264                 mii->mii_media_active = ife->ifm_media;
  265 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/nsgphy.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsgphy.c