sys/dev/mii/exphy.c

   1 /*      $NetBSD: exphy.c,v 1.51 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, and by Frank van der Linden.
  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 3Com internal PHYs
  59  */
  60
  61 #include <sys/cdefs.h>
  62 __KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.51 2008/11/17 03:04:27 dyoung Exp $");
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/kernel.h>
  67 #include <sys/device.h>
  68 #include <sys/socket.h>
  69
  70 #include <net/if.h>
  71 #include <net/if_media.h>
  72
  73 #include <dev/mii/mii.h>
  74 #include <dev/mii/miivar.h>
  75 #include <dev/mii/miidevs.h>
  76
  77 static int      exphymatch(device_t, cfdata_t, void *);
  78 static void     exphyattach(device_t, device_t, void *);
  79
  80 CFATTACH_DECL_NEW(exphy, sizeof(struct mii_softc),
  81     exphymatch, exphyattach, mii_phy_detach, mii_phy_activate);
  82
  83 static int      exphy_service(struct mii_softc *, struct mii_data *, int);
  84 static void     exphy_reset(struct mii_softc *);
  85
  86 static const struct mii_phy_funcs exphy_funcs = {
  87         exphy_service, ukphy_status, exphy_reset,
  88 };
  89
  90 static int
  91 exphymatch(device_t parent, cfdata_t match, void *aux)
  92 {
  93         struct mii_attach_args *ma = aux;
  94
  95         /*
  96          * Argh, 3Com PHY reports oui == 0 model == 0!
  97          */
  98         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 &&
  99             MII_MODEL(ma->mii_id2) != 0)
 100                 return (0);
 101
 102         /*
 103          * Make sure the parent is an `ex'.
 104          */
 105         if (!device_is_a(parent, "ex"))
 106                 return (0);
 107
 108         return (10);
 109 }
 110
 111 static void
 112 exphyattach(device_t parent, device_t self, void *aux)
 113 {
 114         struct mii_softc *sc = device_private(self);
 115         struct mii_attach_args *ma = aux;
 116         struct mii_data *mii = ma->mii_data;
 117
 118         aprint_naive(": Media interface\n");
 119         aprint_normal(": 3Com internal media interface\n");
 120
 121         sc->mii_dev = self;
 122         sc->mii_inst = mii->mii_instance;
 123         sc->mii_phy = ma->mii_phyno;
 124         sc->mii_funcs = &exphy_funcs;
 125         sc->mii_pdata = mii;
 126         sc->mii_flags = ma->mii_flags;
 127         sc->mii_anegticks = MII_ANEGTICKS;
 128
 129         /*
 130          * The 3Com PHY can never be isolated, so never allow non-zero
 131          * instances!
 132          */
 133         if (mii->mii_instance != 0) {
 134                 aprint_error_dev(self,
 135                     "ignoring this PHY, non-zero instance\n");
 136                 return;
 137         }
 138         sc->mii_flags |= MIIF_NOISOLATE;
 139
 140         PHY_RESET(sc);
 141
 142         sc->mii_capabilities =
 143             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 144         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 145                 aprint_error_dev(self, "no media present\n");
 146         else {
 147                 aprint_normal_dev(self, "");
 148                 mii_phy_add_media(sc);
 149                 aprint_normal("\n");
 150         }
 151 }
 152
 153 static int
 154 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 155 {
 156         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 157
 158         /*
 159          * We can't isolate the 3Com PHY, so it has to be the only one!
 160          */
 161         if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 162                 panic("exphy_service: can't isolate 3Com PHY");
 163
 164         switch (cmd) {
 165         case MII_POLLSTAT:
 166                 break;
 167
 168         case MII_MEDIACHG:
 169                 /*
 170                  * If the interface is not up, don't do anything.
 171                  */
 172                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 173                         break;
 174
 175                 mii_phy_setmedia(sc);
 176                 break;
 177
 178         case MII_TICK:
 179                 /*
 180                  * Only used for autonegotiation.
 181                  */
 182                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 183                         return (0);
 184
 185                 if (mii_phy_tick(sc) == EJUSTRETURN)
 186                         return (0);
 187                 break;
 188
 189         case MII_DOWN:
 190                 mii_phy_down(sc);
 191                 return (0);
 192         }
 193
 194         /* Update the media status. */
 195         mii_phy_status(sc);
 196
 197         /* Callback if something changed. */
 198         mii_phy_update(sc, cmd);
 199         return (0);
 200 }
 201
 202 static void
 203 exphy_reset(struct mii_softc *sc)
 204 {
 205
 206         mii_phy_reset(sc);
 207
 208         /*
 209          * XXX 3Com PHY doesn't set the BMCR properly after
 210          * XXX reset, which breaks autonegotiation.
 211          */
 212         PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
 213 }