sys/dev/mii/inphy.c

   1 /*      $NetBSD: inphy.c,v 1.51 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  * driver for Intel's i82555 ethernet 10/100 PHY
  59  * Data Sheet available from www.intel.com
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __KERNEL_RCSID(0, "$NetBSD: inphy.c,v 1.51 2009/02/16 08:00:42 cegger 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/inphyreg.h>
  80
  81 static int      inphymatch(device_t, cfdata_t, void *);
  82 static void     inphyattach(device_t, device_t, void *);
  83
  84 CFATTACH_DECL_NEW(inphy, sizeof(struct mii_softc),
  85     inphymatch, inphyattach, mii_phy_detach, mii_phy_activate);
  86
  87 static int      inphy_service(struct mii_softc *, struct mii_data *, int);
  88 static void     inphy_status(struct mii_softc *);
  89
  90 static const struct mii_phy_funcs inphy_funcs = {
  91         inphy_service, inphy_status, mii_phy_reset,
  92 };
  93
  94 static const struct mii_phydesc inphys[] = {
  95         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82555,
  96           MII_STR_yyINTEL_I82555 },
  97
  98         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82562EH,
  99           MII_STR_yyINTEL_I82562EH },
 100
 101         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82562EM,
 102           MII_STR_yyINTEL_I82562EM },
 103
 104         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82562ET,
 105           MII_STR_yyINTEL_I82562ET },
 106
 107         { MII_OUI_yyINTEL,              MII_MODEL_yyINTEL_I82562G,
 108           MII_STR_yyINTEL_I82562G },
 109
 110         { 0,                            0,
 111           NULL },
 112 };
 113
 114 static int
 115 inphymatch(device_t parent, cfdata_t match, void *aux)
 116 {
 117         struct mii_attach_args *ma = aux;
 118
 119         if (mii_phy_match(ma, inphys) != NULL)
 120                 return (10);
 121
 122         return (0);
 123 }
 124
 125 static void
 126 inphyattach(device_t parent, device_t self, void *aux)
 127 {
 128         struct mii_softc *sc = device_private(self);
 129         struct mii_attach_args *ma = aux;
 130         struct mii_data *mii = ma->mii_data;
 131         const struct mii_phydesc *mpd;
 132
 133         mpd = mii_phy_match(ma, inphys);
 134         aprint_naive(": Media interface\n");
 135         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 136
 137         sc->mii_dev = self;
 138         sc->mii_inst = mii->mii_instance;
 139         sc->mii_phy = ma->mii_phyno;
 140         sc->mii_funcs = &inphy_funcs;
 141         sc->mii_pdata = mii;
 142         sc->mii_flags = ma->mii_flags;
 143         sc->mii_anegticks = MII_ANEGTICKS;
 144
 145         PHY_RESET(sc);
 146
 147         sc->mii_capabilities =
 148             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 149         aprint_normal_dev(self, "");
 150         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 151                 aprint_error("no media present");
 152         else
 153                 mii_phy_add_media(sc);
 154         aprint_normal("\n");
 155 }
 156
 157 static int
 158 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 159 {
 160         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 161         int reg;
 162
 163         switch (cmd) {
 164         case MII_POLLSTAT:
 165                 /*
 166                  * If we're not polling our PHY instance, just return.
 167                  */
 168                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 169                         return (0);
 170                 break;
 171
 172         case MII_MEDIACHG:
 173                 /*
 174                  * If the media indicates a different PHY instance,
 175                  * isolate ourselves.
 176                  */
 177                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 178                         reg = PHY_READ(sc, MII_BMCR);
 179                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 180                         return (0);
 181                 }
 182
 183                 /*
 184                  * If the interface is not up, don't do anything.
 185                  */
 186                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 187                         break;
 188
 189                 mii_phy_setmedia(sc);
 190                 break;
 191
 192         case MII_TICK:
 193                 /*
 194                  * If we're not currently selected, just return.
 195                  */
 196                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 197                         return (0);
 198
 199                 if (mii_phy_tick(sc) == EJUSTRETURN)
 200                         return (0);
 201                 break;
 202
 203         case MII_DOWN:
 204                 mii_phy_down(sc);
 205                 return (0);
 206         }
 207
 208         /* Update the media status. */
 209         mii_phy_status(sc);
 210
 211         /* Callback if something changed. */
 212         mii_phy_update(sc, cmd);
 213         return (0);
 214 }
 215
 216 static void
 217 inphy_status(struct mii_softc *sc)
 218 {
 219         struct mii_data *mii = sc->mii_pdata;
 220         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 221         int bmsr, bmcr, scr;
 222
 223         mii->mii_media_status = IFM_AVALID;
 224         mii->mii_media_active = IFM_ETHER;
 225
 226         bmsr = PHY_READ(sc, MII_BMSR) |
 227             PHY_READ(sc, MII_BMSR);
 228         if (bmsr & BMSR_LINK)
 229                 mii->mii_media_status |= IFM_ACTIVE;
 230
 231         bmcr = PHY_READ(sc, MII_BMCR);
 232         if (bmcr & BMCR_ISO) {
 233                 mii->mii_media_active |= IFM_NONE;
 234                 mii->mii_media_status = 0;
 235                 return;
 236         }
 237
 238         if (bmcr & BMCR_LOOP)
 239                 mii->mii_media_active |= IFM_LOOP;
 240
 241         if (bmcr & BMCR_AUTOEN) {
 242                 if ((bmsr & BMSR_ACOMP) == 0) {
 243                         /* Erg, still trying, I guess... */
 244                         mii->mii_media_active |= IFM_NONE;
 245                         return;
 246                 }
 247
 248                 scr = PHY_READ(sc, MII_INPHY_SCR);
 249                 if (scr & SCR_S100)
 250                         mii->mii_media_active |= IFM_100_TX;
 251                 else if ((bmsr & BMSR_100T4) && (scr & SCR_T4))
 252                         mii->mii_media_active |= IFM_100_T4;
 253                 else
 254                         mii->mii_media_active |= IFM_10_T;
 255                 if (scr & SCR_FDX)
 256                         mii->mii_media_active |= IFM_FDX;
 257
 258                 if (mii->mii_media_active & IFM_FDX)
 259                         mii->mii_media_active |= mii_phy_flowstatus(sc);
 260         } else
 261                 mii->mii_media_active = ife->ifm_media;
 262 }