sys/dev/mii/iophy.c

   1 /*      $NetBSD: iophy.c,v 1.35 2009/02/16 08:00:42 cegger 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  * Intel 82553 PHY driver
  59  */
  60
  61 #include <sys/cdefs.h>
  62 __KERNEL_RCSID(0, "$NetBSD: iophy.c,v 1.35 2009/02/16 08:00:42 cegger 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 #include <dev/mii/iophyreg.h>
  78
  79 static int      iophymatch(device_t, cfdata_t, void *);
  80 static void     iophyattach(device_t, device_t, void *);
  81
  82 CFATTACH_DECL_NEW(iophy, sizeof(struct mii_softc),
  83     iophymatch, iophyattach, mii_phy_detach, mii_phy_activate);
  84
  85 static int      iophy_service(struct mii_softc *, struct mii_data *, int);
  86 static void     iophy_status(struct mii_softc *);
  87
  88 static const struct mii_phy_funcs iophy_funcs = {
  89         iophy_service, iophy_status, mii_phy_reset,
  90 };
  91
  92 static const struct mii_phydesc iophys[] = {
  93         { MII_OUI_xxINTEL,              MII_MODEL_xxINTEL_I82553,
  94           MII_STR_xxINTEL_I82553 },
  95
  96         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82553,
  97           MII_STR_yyINTEL_I82553 },
  98
  99         { 0,                            0,
 100           NULL },
 101 };
 102
 103 static int
 104 iophymatch(device_t parent, cfdata_t match, void *aux)
 105 {
 106         struct mii_attach_args *ma = aux;
 107
 108         if (mii_phy_match(ma, iophys) != NULL)
 109                 return (10);
 110
 111         return (0);
 112 }
 113
 114 static void
 115 iophyattach(device_t parent, device_t self, void *aux)
 116 {
 117         struct mii_softc *sc = device_private(self);
 118         struct mii_attach_args *ma = aux;
 119         struct mii_data *mii = ma->mii_data;
 120         const struct mii_phydesc *mpd;
 121
 122         mpd = mii_phy_match(ma, iophys);
 123         aprint_naive(": Media interface\n");
 124         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 125
 126         sc->mii_dev = self;
 127         sc->mii_inst = mii->mii_instance;
 128         sc->mii_phy = ma->mii_phyno;
 129         sc->mii_funcs = &iophy_funcs;
 130         sc->mii_pdata = mii;
 131         sc->mii_flags = ma->mii_flags;
 132         sc->mii_anegticks = MII_ANEGTICKS;
 133
 134         PHY_RESET(sc);
 135
 136         sc->mii_capabilities =
 137             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 138         aprint_normal_dev(self, "");
 139         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 140                 aprint_error("no media present");
 141         else
 142                 mii_phy_add_media(sc);
 143         aprint_normal("\n");
 144 }
 145
 146 static int
 147 iophy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 148 {
 149         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 150         int reg;
 151
 152         switch (cmd) {
 153         case MII_POLLSTAT:
 154                 /*
 155                  * If we're not polling our PHY instance, just return.
 156                  */
 157                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 158                         return (0);
 159                 break;
 160
 161         case MII_MEDIACHG:
 162                 /*
 163                  * If the media indicates a different PHY instance,
 164                  * isolate ourselves.
 165                  */
 166                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 167                         reg = PHY_READ(sc, MII_BMCR);
 168                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 169                         return (0);
 170                 }
 171
 172                 /*
 173                  * If the interface is not up, don't do anything.
 174                  */
 175                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 176                         break;
 177
 178                 mii_phy_setmedia(sc);
 179                 break;
 180
 181         case MII_TICK:
 182                 /*
 183                  * If we're not currently selected, just return.
 184                  */
 185                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 186                         return (0);
 187
 188                 if (mii_phy_tick(sc) == EJUSTRETURN)
 189                         return (0);
 190                 break;
 191
 192         case MII_DOWN:
 193                 mii_phy_down(sc);
 194                 return (0);
 195         }
 196
 197         /* Update the media status. */
 198         mii_phy_status(sc);
 199
 200         /* Callback if something changed. */
 201         mii_phy_update(sc, cmd);
 202         return (0);
 203 }
 204
 205 static void
 206 iophy_status(struct mii_softc *sc)
 207 {
 208         struct mii_data *mii = sc->mii_pdata;
 209         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 210         int bmsr, bmcr, ext0;
 211
 212         mii->mii_media_status = IFM_AVALID;
 213         mii->mii_media_active = IFM_ETHER;
 214
 215         bmsr = PHY_READ(sc, MII_BMSR) |
 216             PHY_READ(sc, MII_BMSR);
 217         if (bmsr & BMSR_LINK)
 218                 mii->mii_media_status |= IFM_ACTIVE;
 219
 220         bmcr = PHY_READ(sc, MII_BMCR);
 221         if (bmcr & BMCR_ISO) {
 222                 mii->mii_media_active |= IFM_NONE;
 223                 mii->mii_media_status = 0;
 224                 return;
 225         }
 226
 227         if (bmcr & BMCR_LOOP)
 228                 mii->mii_media_active |= IFM_LOOP;
 229
 230         if (bmcr & BMCR_AUTOEN) {
 231                 if ((bmsr & BMSR_ACOMP) == 0) {
 232                         /* Erg, still trying, I guess... */
 233                         mii->mii_media_active |= IFM_NONE;
 234                         return;
 235                 }
 236                 ext0 = PHY_READ(sc, MII_IOPHY_EXT0);
 237
 238                 if (ext0 & EXT0_SPEED) {
 239                         if ((bmsr & BMSR_100TXFDX) || (bmsr & BMSR_100TXHDX)) {
 240                                 mii->mii_media_active |= IFM_100_TX;
 241                         } else if (bmsr & BMSR_100T4) {
 242                                 mii->mii_media_active |= IFM_100_T4;
 243                         }
 244                 } else
 245                         mii->mii_media_active |= IFM_10_T;
 246
 247                 if (ext0 & EXT0_DUPLEX)
 248                         mii->mii_media_active |= IFM_FDX;
 249         } else
 250                 mii->mii_media_active = ife->ifm_media;
 251 }