icsphy.c

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

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

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sys/dev/mii/icsphy.c