sys/dev/netif/mii_layer/amphy.c

   1 /*      $OpenBSD: amphy.c,v 1.13 2005/05/27 08:04:15 brad Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997, 1998, 1999
   5  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Bill Paul.
  18  * 4. Neither the name of the author nor the names of any co-contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.2.2.2 2002/11/08 21:53:49 semenu Exp $
  35  * $DragonFly: src/sys/dev/netif/mii_layer/amphy.c,v 1.11 2006/12/22 23:26:20 swildner Exp $
  36  */
  37
  38 /*
  39  * driver for AMD AM79c873 PHYs
  40  * This driver also works for the Davicom DM9101 PHY, which appears to
  41  * be an AM79c873 workalike.
  42  */
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/socket.h>
  48 #include <sys/bus.h>
  49
  50 #include <net/if.h>
  51 #include <net/if_media.h>
  52
  53 #include "mii.h"
  54 #include "miivar.h"
  55 #include "miidevs.h"
  56
  57 #include "amphyreg.h"
  58
  59 #include "miibus_if.h"
  60
  61 static int amphy_probe          (device_t);
  62 static int amphy_attach         (device_t);
  63
  64 static device_method_t amphy_methods[] = {
  65         /* device interface */
  66         DEVMETHOD(device_probe,         amphy_probe),
  67         DEVMETHOD(device_attach,        amphy_attach),
  68         DEVMETHOD(device_detach,        ukphy_detach),
  69         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  70         { 0, 0 }
  71 };
  72
  73 static const struct mii_phydesc amphys[] = {
  74         MII_PHYDESC(xxAMD,      79C873),
  75         MII_PHYDESC(xxDAVICOM,  DM9101),
  76         MII_PHYDESC(DAVICOM,    DM9102),
  77         MII_PHYDESC(DAVICOM,    DM9601),
  78         MII_PHYDESC_NULL
  79 };
  80
  81 static devclass_t amphy_devclass;
  82
  83 static driver_t amphy_driver = {
  84         "amphy",
  85         amphy_methods,
  86         sizeof(struct mii_softc)
  87 };
  88
  89 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
  90
  91 static int      amphy_service(struct mii_softc *, struct mii_data *, int);
  92 static void     amphy_status(struct mii_softc *);
  93
  94 static int
  95 amphy_probe(device_t dev)
  96 {
  97         struct mii_attach_args *ma = device_get_ivars(dev);
  98         const struct mii_phydesc *mpd;
  99
 100         mpd = mii_phy_match(ma, amphys);
 101         if (mpd != NULL) {
 102                 device_set_desc(dev, mpd->mpd_name);
 103                 return (0);
 104         }
 105         return (ENXIO);
 106 }
 107
 108 static int
 109 amphy_attach(device_t dev)
 110 {
 111         struct mii_softc *sc;
 112         struct mii_attach_args *ma;
 113         struct mii_data *mii;
 114
 115         sc = device_get_softc(dev);
 116         ma = device_get_ivars(dev);
 117         mii_softc_init(sc, ma);
 118         sc->mii_dev = device_get_parent(dev);
 119         mii = device_get_softc(sc->mii_dev);
 120         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 121
 122         sc->mii_inst = mii->mii_instance;
 123         sc->mii_service = amphy_service;
 124         sc->mii_pdata = mii;
 125
 126         sc->mii_flags |= MIIF_NOISOLATE;
 127         mii->mii_instance++;
 128
 129 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 130
 131         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 132             MII_MEDIA_NONE);
 133 #if 0
 134         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 135             MII_MEDIA_100_TX);
 136 #endif
 137
 138         mii_phy_reset(sc);
 139
 140         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 141         device_printf(dev, " ");
 142         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 143                 kprintf("no media present");
 144         else
 145                 mii_phy_add_media(sc);
 146         kprintf("\n");
 147 #undef ADD
 148         MIIBUS_MEDIAINIT(sc->mii_dev);
 149         return(0);
 150 }
 151
 152 static int
 153 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 154 {
 155         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 156         int reg;
 157
 158         switch (cmd) {
 159         case MII_POLLSTAT:
 160                 /*
 161                  * If we're not polling our PHY instance, just return.
 162                  */
 163                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 164                         return (0);
 165                 break;
 166
 167         case MII_MEDIACHG:
 168                 /*
 169                  * If the media indicates a different PHY instance,
 170                  * isolate ourselves.
 171                  */
 172                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 173                         reg = PHY_READ(sc, MII_BMCR);
 174                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 175                         return (0);
 176                 }
 177
 178                 /*
 179                  * If the interface is not up, don't do anything.
 180                  */
 181                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 182                         break;
 183
 184                 mii_phy_set_media(sc);
 185                 break;
 186
 187         case MII_TICK:
 188                 /*
 189                  * If we're not currently selected, just return.
 190                  */
 191                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 192                         return (0);
 193
 194                 if (mii_phy_tick(sc) == EJUSTRETURN)
 195                         return (0);
 196                 break;
 197         }
 198
 199         /* Update the media status. */
 200         amphy_status(sc);
 201
 202         /* Callback if something changed. */
 203         mii_phy_update(sc, cmd);
 204         return (0);
 205 }
 206
 207 static void
 208 amphy_status(struct mii_softc *sc)
 209 {
 210         struct mii_data *mii = sc->mii_pdata;
 211         int bmsr, bmcr, par, anlpar;
 212
 213         mii->mii_media_status = IFM_AVALID;
 214         mii->mii_media_active = IFM_ETHER;
 215
 216         bmsr = PHY_READ(sc, MII_BMSR) |
 217             PHY_READ(sc, MII_BMSR);
 218         if (bmsr & BMSR_LINK)
 219                 mii->mii_media_status |= IFM_ACTIVE;
 220
 221         bmcr = PHY_READ(sc, MII_BMCR);
 222         if (bmcr & BMCR_ISO) {
 223                 mii->mii_media_active |= IFM_NONE;
 224                 mii->mii_media_status = 0;
 225                 return;
 226         }
 227
 228         if (bmcr & BMCR_LOOP)
 229                 mii->mii_media_active |= IFM_LOOP;
 230
 231         if (bmcr & BMCR_AUTOEN) {
 232                 /*
 233                  * The PAR status bits are only valid of autonegotiation
 234                  * has completed (or it's disabled).
 235                  */
 236                 if ((bmsr & BMSR_ACOMP) == 0) {
 237                         /* Erg, still trying, I guess... */
 238                         mii->mii_media_active |= IFM_NONE;
 239                         return;
 240                 }
 241
 242                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
 243                         anlpar = PHY_READ(sc, MII_ANAR) &
 244                             PHY_READ(sc, MII_ANLPAR);
 245                         if (anlpar & ANLPAR_T4)
 246                                 mii->mii_media_active |= IFM_100_T4;
 247                         else if (anlpar & ANLPAR_TX_FD)
 248                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 249                         else if (anlpar & ANLPAR_TX)
 250                                 mii->mii_media_active |= IFM_100_TX;
 251                         else if (anlpar & ANLPAR_10_FD)
 252                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
 253                         else if (anlpar & ANLPAR_10)
 254                                 mii->mii_media_active |= IFM_10_T;
 255                         else
 256                                 mii->mii_media_active |= IFM_NONE;
 257                         return;
 258                 }
 259
 260                 /*
 261                  * Link partner is not capable of autonegotiation.
 262                  */
 263                 par = PHY_READ(sc, MII_AMPHY_DSCSR);
 264                 if (par & DSCSR_100FDX)
 265                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 266                 else if (par & DSCSR_100HDX)
 267                         mii->mii_media_active |= IFM_100_TX;
 268                 else if (par & DSCSR_10FDX)
 269                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
 270                 else if (par & DSCSR_10HDX)
 271                         mii->mii_media_active |= IFM_10_T;
 272         } else {
 273                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
 274         }
 275 }