icsphy.c

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    1 /*      $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   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 THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   55  */
   56 
   57 #include <sys/cdefs.h>
   58 __FBSDID("$FreeBSD$");
   59 
   60 /*
   61  * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY
   62  * datasheet from www.icst.com
   63  */
   64 
   65 #include <sys/param.h>
   66 #include <sys/systm.h>
   67 #include <sys/kernel.h>
   68 #include <sys/module.h>
   69 #include <sys/socket.h>
   70 #include <sys/bus.h>
   71 
   72 #include <net/if.h>
   73 #include <net/if_media.h>
   74 
   75 #include <dev/mii/mii.h>
   76 #include <dev/mii/miivar.h>
   77 #include "miidevs.h"
   78 
   79 #include <dev/mii/icsphyreg.h>
   80 
   81 #include "miibus_if.h"
   82 
   83 static int      icsphy_probe(device_t dev);
   84 static int      icsphy_attach(device_t dev);
   85 
   86 static device_method_t icsphy_methods[] = {
   87         /* device interface */
   88         DEVMETHOD(device_probe,         icsphy_probe),
   89         DEVMETHOD(device_attach,        icsphy_attach),
   90         DEVMETHOD(device_detach,        mii_phy_detach),
   91         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   92         DEVMETHOD_END
   93 };
   94 
   95 static devclass_t icsphy_devclass;
   96 
   97 static driver_t icsphy_driver = {
   98         "icsphy",
   99         icsphy_methods,
  100         sizeof(struct mii_softc)
  101 };
  102 
  103 DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0);
  104 
  105 static int      icsphy_service(struct mii_softc *, struct mii_data *, int);
  106 static void     icsphy_status(struct mii_softc *);
  107 static void     icsphy_reset(struct mii_softc *);
  108 
  109 static const struct mii_phydesc icsphys[] = {
  110         MII_PHY_DESC(ICS, 1889),
  111         MII_PHY_DESC(ICS, 1890),
  112         MII_PHY_DESC(ICS, 1892),
  113         MII_PHY_DESC(ICS, 1893),
  114         MII_PHY_END
  115 };
  116 
  117 static const struct mii_phy_funcs icsphy_funcs = {
  118         icsphy_service,
  119         icsphy_status,
  120         icsphy_reset
  121 };
  122 
  123 static int
  124 icsphy_probe(device_t dev)
  125 {
  126 
  127         return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
  128 }
  129 
  130 static int
  131 icsphy_attach(device_t dev)
  132 {
  133 
  134         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  135             &icsphy_funcs, 1);
  136         return (0);
  137 }
  138 
  139 static int
  140 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  141 {
  142 
  143         switch (cmd) {
  144         case MII_POLLSTAT:
  145                 break;
  146 
  147         case MII_MEDIACHG:
  148                 /*
  149                  * If the interface is not up, don't do anything.
  150                  */
  151                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  152                         break;
  153 
  154                 mii_phy_setmedia(sc);
  155                 break;
  156 
  157         case MII_TICK:
  158                 if (mii_phy_tick(sc) == EJUSTRETURN)
  159                         return (0);
  160                 break;
  161         }
  162 
  163         /* Update the media status. */
  164         PHY_STATUS(sc);
  165 
  166         /* Callback if something changed. */
  167         mii_phy_update(sc, cmd);
  168         return (0);
  169 }
  170 
  171 static void
  172 icsphy_status(struct mii_softc *sc)
  173 {
  174         struct mii_data *mii = sc->mii_pdata;
  175         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  176         int bmcr, qpr;
  177 
  178         mii->mii_media_status = IFM_AVALID;
  179         mii->mii_media_active = IFM_ETHER;
  180 
  181         /*
  182          * Don't get link from the BMSR.  It's available in the QPR,
  183          * and we have to read it twice to unlatch it anyhow.  This
  184          * gives us fewer register reads.
  185          */
  186         qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* unlatch */
  187         qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* real value */
  188 
  189         if (qpr & QPR_LINK)
  190                 mii->mii_media_status |= IFM_ACTIVE;
  191 
  192         bmcr = PHY_READ(sc, MII_BMCR);
  193         if (bmcr & BMCR_ISO) {
  194                 mii->mii_media_active |= IFM_NONE;
  195                 mii->mii_media_status = 0;
  196                 return;
  197         }
  198 
  199         if (bmcr & BMCR_LOOP)
  200                 mii->mii_media_active |= IFM_LOOP;
  201 
  202         if (bmcr & BMCR_AUTOEN) {
  203                 if ((qpr & QPR_ACOMP) == 0) {
  204                         /* Erg, still trying, I guess... */
  205                         mii->mii_media_active |= IFM_NONE;
  206                         return;
  207                 }
  208                 if (qpr & QPR_SPEED)
  209                         mii->mii_media_active |= IFM_100_TX;
  210                 else
  211                         mii->mii_media_active |= IFM_10_T;
  212                 if (qpr & QPR_FDX)
  213                         mii->mii_media_active |=
  214                             IFM_FDX | mii_phy_flowstatus(sc);
  215                 else
  216                         mii->mii_media_active |= IFM_HDX;
  217         } else
  218                 mii->mii_media_active = ife->ifm_media;
  219 }
  220 
  221 static void
  222 icsphy_reset(struct mii_softc *sc)
  223 {
  224 
  225         mii_phy_reset(sc);
  226         /* set powerdown feature */
  227         switch (sc->mii_mpd_model) {
  228                 case MII_MODEL_ICS_1890:
  229                 case MII_MODEL_ICS_1893:
  230                         PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
  231                         break;
  232                 case MII_MODEL_ICS_1892:
  233                         PHY_WRITE(sc, MII_ICSPHY_ECR2,
  234                             ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN);
  235                         break;
  236                 default:
  237                         /* 1889 have no ECR2 */
  238                         break;
  239         }
  240         /*
  241          * There is no description that the reset do auto-negotiation in the
  242          * data sheet.
  243          */
  244         PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX);
  245 }

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

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sys/dev/mii/icsphy.c