sys/dev/mii/dmphy.c

   1 /*      $NetBSD: dmphy.c,v 1.33 2008/11/17 03:04:27 dyoung 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 /*
  58  * driver for Davicom's DM9101 ethernet 10/100 PHY
  59  * Data Sheet available from www.davicom8.com
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __KERNEL_RCSID(0, "$NetBSD: dmphy.c,v 1.33 2008/11/17 03:04:27 dyoung Exp $");
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67 #include <sys/kernel.h>
  68 #include <sys/device.h>
  69 #include <sys/socket.h>
  70 #include <sys/errno.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 <dev/mii/miidevs.h>
  78
  79 #include <dev/mii/dmphyreg.h>
  80
  81 static int      dmphymatch(device_t, cfdata_t, void *);
  82 static void     dmphyattach(device_t, device_t, void *);
  83
  84 CFATTACH_DECL_NEW(dmphy, sizeof(struct mii_softc),
  85     dmphymatch, dmphyattach, mii_phy_detach, mii_phy_activate);
  86
  87 static int      dmphy_service(struct mii_softc *, struct mii_data *, int);
  88 static void     dmphy_status(struct mii_softc *);
  89
  90 static const struct mii_phy_funcs dmphy_funcs = {
  91         dmphy_service, dmphy_status, mii_phy_reset,
  92 };
  93
  94 static const struct mii_phydesc dmphys[] = {
  95         { MII_OUI_xxDAVICOM,            MII_MODEL_xxDAVICOM_DM9101,
  96           MII_STR_xxDAVICOM_DM9101 },
  97
  98         { MII_OUI_xxDAVICOM,            MII_MODEL_xxDAVICOM_DM9102,
  99           MII_STR_xxDAVICOM_DM9102 },
 100
 101         { MII_OUI_DAVICOM,              MII_MODEL_xxDAVICOM_DM9101,
 102           MII_STR_xxDAVICOM_DM9101 },
 103
 104         { 0,                            0,
 105           NULL },
 106 };
 107
 108 static int
 109 dmphymatch(device_t parent, cfdata_t match, void *aux)
 110 {
 111         struct mii_attach_args *ma = aux;
 112
 113         if (mii_phy_match(ma, dmphys) != NULL)
 114                 return (10);
 115
 116         return (0);
 117 }
 118
 119 static void
 120 dmphyattach(device_t parent, device_t self, void *aux)
 121 {
 122         struct mii_softc *sc = device_private(self);
 123         struct mii_attach_args *ma = aux;
 124         struct mii_data *mii = ma->mii_data;
 125         const struct mii_phydesc *mpd;
 126
 127         mpd = mii_phy_match(ma, dmphys);
 128         aprint_naive(": Media interface\n");
 129         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 130
 131         sc->mii_dev = self;
 132         sc->mii_inst = mii->mii_instance;
 133         sc->mii_phy = ma->mii_phyno;
 134         sc->mii_funcs = &dmphy_funcs;
 135         sc->mii_pdata = mii;
 136         sc->mii_flags = ma->mii_flags;
 137         sc->mii_anegticks = MII_ANEGTICKS;
 138
 139         PHY_RESET(sc);
 140
 141         sc->mii_capabilities =
 142             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 143         aprint_normal_dev(self, "");
 144         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 145                 aprint_error("no media present");
 146         else
 147                 mii_phy_add_media(sc);
 148         aprint_normal("\n");
 149 }
 150
 151 static int
 152 dmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 153 {
 154         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 155         int reg;
 156
 157         switch (cmd) {
 158         case MII_POLLSTAT:
 159                 /*
 160                  * If we're not polling our PHY instance, just return.
 161                  */
 162                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 163                         return (0);
 164                 break;
 165
 166         case MII_MEDIACHG:
 167                 /*
 168                  * If the media indicates a different PHY instance,
 169                  * isolate ourselves.
 170                  */
 171                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 172                         reg = PHY_READ(sc, MII_BMCR);
 173                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 174                         return (0);
 175                 }
 176
 177                 /*
 178                  * If the interface is not up, don't do anything.
 179                  */
 180                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 181                         break;
 182
 183                 mii_phy_setmedia(sc);
 184                 break;
 185
 186         case MII_TICK:
 187                 /*
 188                  * If we're not currently selected, just return.
 189                  */
 190                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 191                         return (0);
 192
 193                 if (mii_phy_tick(sc) == EJUSTRETURN)
 194                         return (0);
 195                 break;
 196
 197         case MII_DOWN:
 198                 mii_phy_down(sc);
 199                 return (0);
 200         }
 201
 202         /* Update the media status. */
 203         mii_phy_status(sc);
 204
 205         /* Callback if something changed. */
 206         mii_phy_update(sc, cmd);
 207         return (0);
 208 }
 209
 210 static void
 211 dmphy_status(struct mii_softc *sc)
 212 {
 213         struct mii_data *mii = sc->mii_pdata;
 214         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 215         int bmsr, bmcr, dscsr;
 216
 217         mii->mii_media_status = IFM_AVALID;
 218         mii->mii_media_active = IFM_ETHER;
 219
 220         bmsr = PHY_READ(sc, MII_BMSR) |
 221             PHY_READ(sc, MII_BMSR);
 222         if (bmsr & BMSR_LINK)
 223                 mii->mii_media_status |= IFM_ACTIVE;
 224
 225         bmcr = PHY_READ(sc, MII_BMCR);
 226         if (bmcr & BMCR_ISO) {
 227                 mii->mii_media_active |= IFM_NONE;
 228                 mii->mii_media_status = 0;
 229                 return;
 230         }
 231
 232         if (bmcr & BMCR_LOOP)
 233                 mii->mii_media_active |= IFM_LOOP;
 234
 235         if (bmcr & BMCR_AUTOEN) {
 236                 /*
 237                  * The PAR status bits are only valid of autonegotiation
 238                  * has completed (or it's disabled).
 239                  */
 240                 if ((bmsr & BMSR_ACOMP) == 0) {
 241                         /* Erg, still trying, I guess... */
 242                         mii->mii_media_active |= IFM_NONE;
 243                         return;
 244                 }
 245
 246                 dscsr = PHY_READ(sc, MII_DMPHY_DSCSR);
 247                 if (dscsr & DSCSR_100FDX)
 248                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 249                 else if (dscsr & DSCSR_100HDX)
 250                         mii->mii_media_active |= IFM_100_TX;
 251                 else if (dscsr & DSCSR_10FDX)
 252                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
 253                 else if (dscsr & DSCSR_10HDX)
 254                         mii->mii_media_active |= IFM_10_T;
 255                 else
 256                         mii->mii_media_active |= IFM_NONE;
 257         } else
 258                 mii->mii_media_active = ife->ifm_media;
 259 }