sys/dev/mii/ukphy.c

   1 /*      $NetBSD: ukphy.c,v 1.37 2009/08/23 15:26:42 jmcneill 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 generic unknown PHYs
  59  */
  60
  61 #include <sys/cdefs.h>
  62 __KERNEL_RCSID(0, "$NetBSD: ukphy.c,v 1.37 2009/08/23 15:26:42 jmcneill Exp $");
  63
  64 #include "opt_mii.h"
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/kernel.h>
  69 #include <sys/device.h>
  70 #include <sys/socket.h>
  71 #include <sys/errno.h>
  72
  73 #include <net/if.h>
  74 #include <net/if_media.h>
  75
  76 #include <dev/mii/mii.h>
  77 #include <dev/mii/miivar.h>
  78
  79 #ifdef MIIVERBOSE
  80 struct mii_knowndev {
  81         int oui;
  82         int model;
  83         const char *descr;
  84 };
  85 #include <dev/mii/miidevs.h>
  86 #include <dev/mii/miidevs_data.h>
  87 #endif
  88
  89 static int      ukphymatch(device_t, cfdata_t, void *);
  90 static void     ukphyattach(device_t, device_t, void *);
  91
  92 CFATTACH_DECL_NEW(ukphy, sizeof(struct mii_softc),
  93     ukphymatch, ukphyattach, mii_phy_detach, mii_phy_activate);
  94
  95 static int      ukphy_service(struct mii_softc *, struct mii_data *, int);
  96
  97 static const struct mii_phy_funcs ukphy_funcs = {
  98         ukphy_service, ukphy_status, mii_phy_reset,
  99 };
 100
 101 static int
 102 ukphymatch(device_t parent, cfdata_t match, void *aux)
 103 {
 104
 105         /*
 106          * We know something is here, so always match at a low priority.
 107          */
 108         return (1);
 109 }
 110
 111 static void
 112 ukphyattach(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         int oui = MII_OUI(ma->mii_id1, ma->mii_id2);
 118         int model = MII_MODEL(ma->mii_id2);
 119         int rev = MII_REV(ma->mii_id2);
 120 #ifdef MIIVERBOSE
 121         int i;
 122 #endif
 123
 124 #ifdef MIIVERBOSE
 125         for (i = 0; mii_knowndevs[i].descr != NULL; i++)
 126                 if (mii_knowndevs[i].oui == oui &&
 127                     mii_knowndevs[i].model == model)
 128                         break;
 129         if (mii_knowndevs[i].descr != NULL)
 130                 aprint_normal(": %s (OUI 0x%06x, model 0x%04x), rev. %d\n",
 131                        mii_knowndevs[i].descr,
 132                        oui, model, rev);
 133         else
 134 #endif
 135                 aprint_normal(": OUI 0x%06x, model 0x%04x, rev. %d\n",
 136                        oui, model, rev);
 137
 138         sc->mii_dev = self;
 139         sc->mii_inst = mii->mii_instance;
 140         sc->mii_phy = ma->mii_phyno;
 141         sc->mii_funcs = &ukphy_funcs;
 142         sc->mii_pdata = mii;
 143         sc->mii_flags = ma->mii_flags;
 144         sc->mii_anegticks = MII_ANEGTICKS;
 145
 146         /*
 147          * Don't do loopback on unknown PHYs.  It might confuse some of them.
 148          */
 149         sc->mii_flags |= MIIF_NOLOOP;
 150
 151         PHY_RESET(sc);
 152
 153         sc->mii_capabilities =
 154             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 155         if (sc->mii_capabilities & BMSR_EXTSTAT)
 156                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
 157         aprint_normal_dev(self, "");
 158         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
 159             (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
 160                 aprint_error("no media present");
 161         else
 162                 mii_phy_add_media(sc);
 163         aprint_normal("\n");
 164 }
 165
 166 static int
 167 ukphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 168 {
 169         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 170         int reg;
 171
 172         switch (cmd) {
 173         case MII_POLLSTAT:
 174                 /*
 175                  * If we're not polling our PHY instance, just return.
 176                  */
 177                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 178                         return (0);
 179                 break;
 180
 181         case MII_MEDIACHG:
 182                 /*
 183                  * If the media indicates a different PHY instance,
 184                  * isolate ourselves.
 185                  */
 186                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 187                         reg = PHY_READ(sc, MII_BMCR);
 188                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 189                         return (0);
 190                 }
 191
 192                 /*
 193                  * If the interface is not up, don't do anything.
 194                  */
 195                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 196                         break;
 197
 198                 mii_phy_setmedia(sc);
 199                 break;
 200
 201         case MII_TICK:
 202                 /*
 203                  * If we're not currently selected, just return.
 204                  */
 205                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 206                         return (0);
 207
 208                 /*
 209                  * Only used for autonegotiation.
 210                  */
 211                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 212                         return (0);
 213
 214                 if (mii_phy_tick(sc) == EJUSTRETURN)
 215                         return (0);
 216                 break;
 217
 218         case MII_DOWN:
 219                 mii_phy_down(sc);
 220                 return (0);
 221         }
 222
 223         /* Update the media status. */
 224         mii_phy_status(sc);
 225
 226         /* Callback if something changed. */
 227         mii_phy_update(sc, cmd);
 228         return (0);
 229 }