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 devclass_t icsphy_devclass;
   98 
   99 static driver_t icsphy_driver = {
  100         "icsphy",
  101         icsphy_methods,
  102         sizeof(struct mii_softc)
  103 };
  104 
  105 DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0);
  106 
  107 static int      icsphy_service(struct mii_softc *, struct mii_data *, int);
  108 static void     icsphy_status(struct mii_softc *);
  109 static void     icsphy_reset(struct mii_softc *);
  110 
  111 static const struct mii_phydesc icsphys[] = {
  112         MII_PHY_DESC(ICS, 1889),
  113         MII_PHY_DESC(ICS, 1890),
  114         MII_PHY_DESC(ICS, 1892),
  115         MII_PHY_DESC(ICS, 1893),
  116         MII_PHY_DESC(ICS, 1893C),
  117         MII_PHY_END
  118 };
  119 
  120 static const struct mii_phy_funcs icsphy_funcs = {
  121         icsphy_service,
  122         icsphy_status,
  123         icsphy_reset
  124 };
  125 
  126 static int
  127 icsphy_probe(device_t dev)
  128 {
  129 
  130         return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
  131 }
  132 
  133 static int
  134 icsphy_attach(device_t dev)
  135 {
  136 
  137         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  138             &icsphy_funcs, 1);
  139         return (0);
  140 }
  141 
  142 static int
  143 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  144 {
  145 
  146         switch (cmd) {
  147         case MII_POLLSTAT:
  148                 break;
  149 
  150         case MII_MEDIACHG:
  151                 mii_phy_setmedia(sc);
  152                 break;
  153 
  154         case MII_TICK:
  155                 if (mii_phy_tick(sc) == EJUSTRETURN)
  156                         return (0);
  157                 break;
  158         }
  159 
  160         /* Update the media status. */
  161         PHY_STATUS(sc);
  162 
  163         /* Callback if something changed. */
  164         mii_phy_update(sc, cmd);
  165         return (0);
  166 }
  167 
  168 static void
  169 icsphy_status(struct mii_softc *sc)
  170 {
  171         struct mii_data *mii = sc->mii_pdata;
  172         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  173         int bmcr, qpr;
  174 
  175         mii->mii_media_status = IFM_AVALID;
  176         mii->mii_media_active = IFM_ETHER;
  177 
  178         /*
  179          * Don't get link from the BMSR.  It's available in the QPR,
  180          * and we have to read it twice to unlatch it anyhow.  This
  181          * gives us fewer register reads.
  182          */
  183         qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* unlatch */
  184         qpr = PHY_READ(sc, MII_ICSPHY_QPR);             /* real value */
  185 
  186         if (qpr & QPR_LINK)
  187                 mii->mii_media_status |= IFM_ACTIVE;
  188 
  189         bmcr = PHY_READ(sc, MII_BMCR);
  190         if (bmcr & BMCR_ISO) {
  191                 mii->mii_media_active |= IFM_NONE;
  192                 mii->mii_media_status = 0;
  193                 return;
  194         }
  195 
  196         if (bmcr & BMCR_LOOP)
  197                 mii->mii_media_active |= IFM_LOOP;
  198 
  199         if (bmcr & BMCR_AUTOEN) {
  200                 if ((qpr & QPR_ACOMP) == 0) {
  201                         /* Erg, still trying, I guess... */
  202                         mii->mii_media_active |= IFM_NONE;
  203                         return;
  204                 }
  205                 if (qpr & QPR_SPEED)
  206                         mii->mii_media_active |= IFM_100_TX;
  207                 else
  208                         mii->mii_media_active |= IFM_10_T;
  209                 if (qpr & QPR_FDX)
  210                         mii->mii_media_active |=
  211                             IFM_FDX | mii_phy_flowstatus(sc);
  212                 else
  213                         mii->mii_media_active |= IFM_HDX;
  214         } else
  215                 mii->mii_media_active = ife->ifm_media;
  216 }
  217 
  218 static void
  219 icsphy_reset(struct mii_softc *sc)
  220 {
  221 
  222         mii_phy_reset(sc);
  223         /* set powerdown feature */
  224         switch (sc->mii_mpd_model) {
  225                 case MII_MODEL_ICS_1890:
  226                 case MII_MODEL_ICS_1893:
  227                         PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
  228                         break;
  229                 case MII_MODEL_ICS_1892:
  230                         PHY_WRITE(sc, MII_ICSPHY_ECR2,
  231                             ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN);
  232                         break;
  233                 default:
  234                         /* 1889 have no ECR2 */
  235                         break;
  236         }
  237         /*
  238          * There is no description that the reset do auto-negotiation in the
  239          * data sheet.
  240          */
  241         PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX);
  242 }

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

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sys/dev/mii/icsphy.c