sys/dev/netif/mii_layer/xmphy.c

   1 /*
   2  * Copyright (c) 2000
   3  *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  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
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/sys/dev/mii/xmphy.c,v 1.1.2.5 2002/11/08 21:53:49 semenu Exp $
  33  */
  34
  35 /*
  36  * driver for the XaQti XMAC II's internal PHY. This is sort of
  37  * like a 10/100 PHY, except the only thing we're really autoselecting
  38  * here is full/half duplex. Speed is always 1000mbps.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/socket.h>
  45 #include <sys/bus.h>
  46
  47 #include <machine/clock.h>
  48
  49 #include <net/if.h>
  50 #include <net/if_var.h>
  51 #include <net/if_media.h>
  52
  53 #include "mii.h"
  54 #include "miivar.h"
  55 #include "miidevs.h"
  56
  57 #include "xmphyreg.h"
  58
  59 #include "miibus_if.h"
  60
  61 static int xmphy_probe          (device_t);
  62 static int xmphy_attach         (device_t);
  63
  64 static device_method_t xmphy_methods[] = {
  65         /* device interface */
  66         DEVMETHOD(device_probe,         xmphy_probe),
  67         DEVMETHOD(device_attach,        xmphy_attach),
  68         DEVMETHOD(device_detach,        ukphy_detach),
  69         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  70         DEVMETHOD_END
  71 };
  72
  73 static const struct mii_phydesc xmphys[] = {
  74         MII_PHYDESC(xxXAQTI,    XMACII),
  75         MII_PHYDESC(JATO,       BASEX),
  76         MII_PHYDESC_NULL
  77 };
  78
  79 static devclass_t xmphy_devclass;
  80
  81 static driver_t xmphy_driver = {
  82         "xmphy",
  83         xmphy_methods,
  84         sizeof(struct mii_softc)
  85 };
  86
  87 DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, NULL, NULL);
  88
  89 static int      xmphy_service(struct mii_softc *, struct mii_data *, int);
  90 static void     xmphy_status(struct mii_softc *);
  91
  92 static int      xmphy_mii_phy_auto(struct mii_softc *, int);
  93
  94 static int
  95 xmphy_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, xmphys);
 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 xmphy_attach(device_t dev)
 110 {
 111         struct mii_softc *sc;
 112         struct mii_attach_args *ma;
 113         struct mii_data *mii;
 114         const char *sep = "";
 115
 116         sc = device_get_softc(dev);
 117         ma = device_get_ivars(dev);
 118         mii_softc_init(sc, ma);
 119         sc->mii_dev = device_get_parent(dev);
 120         mii = device_get_softc(sc->mii_dev);
 121         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 122
 123         sc->mii_inst = mii->mii_instance;
 124         sc->mii_service = xmphy_service;
 125         sc->mii_reset = mii_phy_reset;
 126         sc->mii_pdata = mii;
 127
 128         sc->mii_flags |= MIIF_NOISOLATE;
 129         mii->mii_instance++;
 130
 131 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 132 #define PRINT(s)        kprintf("%s%s", sep, s); sep = ", "
 133
 134         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 135             BMCR_ISO);
 136 #if 0
 137         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 138             BMCR_LOOP|BMCR_S100);
 139 #endif
 140
 141         mii_phy_reset(sc);
 142
 143         device_printf(dev, " ");
 144         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
 145             XMPHY_BMCR_FDX);
 146         PRINT("1000baseSX");
 147         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
 148         PRINT("1000baseSX-FDX");
 149         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
 150         PRINT("auto");
 151
 152         kprintf("\n");
 153 #undef ADD
 154 #undef PRINT
 155
 156         MIIBUS_MEDIAINIT(sc->mii_dev);
 157         return(0);
 158 }
 159
 160 static int
 161 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 162 {
 163         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 164         int reg;
 165
 166         switch (cmd) {
 167         case MII_POLLSTAT:
 168                 /*
 169                  * If we're not polling our PHY instance, just return.
 170                  */
 171                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 172                         return (0);
 173                 break;
 174
 175         case MII_MEDIACHG:
 176                 /*
 177                  * If the media indicates a different PHY instance,
 178                  * isolate ourselves.
 179                  */
 180                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 181                         reg = PHY_READ(sc, MII_BMCR);
 182                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 183                         return (0);
 184                 }
 185
 186                 /*
 187                  * If the interface is not up, don't do anything.
 188                  */
 189                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 190                         break;
 191
 192                 switch (IFM_SUBTYPE(ife->ifm_media)) {
 193                 case IFM_AUTO:
 194 #ifdef foo
 195                         /*
 196                          * If we're already in auto mode, just return.
 197                          */
 198                         if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
 199                                 return (0);
 200 #endif
 201                         xmphy_mii_phy_auto(sc, 1);
 202                         break;
 203                 case IFM_1000_SX:
 204                         mii_phy_reset(sc);
 205                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
 206                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
 207                                 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
 208                         } else {
 209                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
 210                                 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
 211                         }
 212                         break;
 213                 case IFM_100_T4:
 214                 case IFM_100_TX:
 215                 case IFM_10_T:
 216                 default:
 217                         return (EINVAL);
 218                 }
 219                 break;
 220
 221         case MII_TICK:
 222                 /*
 223                  * If we're not currently selected, just return.
 224                  */
 225                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 226                         return (0);
 227
 228                 /*
 229                  * Is the interface even up?
 230                  */
 231                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 232                         return (0);
 233
 234                 /*
 235                  * Only used for autonegotiation.
 236                  */
 237                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 238                         break;
 239
 240                 /*
 241                  * Check to see if we have link.  If we do, we don't
 242                  * need to restart the autonegotiation process.  Read
 243                  * the BMSR twice in case it's latched.
 244                  */
 245                 reg = PHY_READ(sc, XMPHY_MII_BMSR) |
 246                     PHY_READ(sc, XMPHY_MII_BMSR);
 247                 if (reg & XMPHY_BMSR_LINK) {
 248                         sc->mii_ticks = 0;
 249                         break;
 250                 }
 251
 252                 /*
 253                  * Only retry autonegotiation every mii_anegticks seconds.
 254                  */
 255                 if (++sc->mii_ticks <= sc->mii_anegticks)
 256                         return (0);
 257
 258                 sc->mii_ticks = 0;
 259
 260                 mii_phy_reset(sc);
 261                 if (xmphy_mii_phy_auto(sc, 0) == EJUSTRETURN)
 262                         return(0);
 263                 break;
 264         }
 265
 266         /* Update the media status. */
 267         xmphy_status(sc);
 268
 269         /* Callback if something changed. */
 270         mii_phy_update(sc, cmd);
 271         return (0);
 272 }
 273
 274 static void
 275 xmphy_status(struct mii_softc *sc)
 276 {
 277         struct mii_data *mii = sc->mii_pdata;
 278         int bmsr, bmcr, anlpar;
 279
 280         mii->mii_media_status = IFM_AVALID;
 281         mii->mii_media_active = IFM_ETHER;
 282
 283         bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
 284             PHY_READ(sc, XMPHY_MII_BMSR);
 285         if (bmsr & XMPHY_BMSR_LINK)
 286                 mii->mii_media_status |= IFM_ACTIVE;
 287
 288         /* Do dummy read of extended status register. */
 289         bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
 290
 291         bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
 292
 293         if (bmcr & XMPHY_BMCR_LOOP)
 294                 mii->mii_media_active |= IFM_LOOP;
 295
 296         if (bmcr & XMPHY_BMCR_AUTOEN) {
 297                 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
 298                         if (bmsr & XMPHY_BMSR_LINK) {
 299                                 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
 300                                 return;
 301                         }
 302                         /* Erg, still trying, I guess... */
 303                         mii->mii_media_active |= IFM_NONE;
 304                         return;
 305                 }
 306
 307                 mii->mii_media_active |= IFM_1000_SX;
 308                 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
 309                     PHY_READ(sc, XMPHY_MII_ANLPAR);
 310                 if (anlpar & XMPHY_ANLPAR_FDX)
 311                         mii->mii_media_active |= IFM_FDX;
 312                 else
 313                         mii->mii_media_active |= IFM_HDX;
 314                 return;
 315         }
 316
 317         mii->mii_media_active |= IFM_1000_SX;
 318         if (bmcr & XMPHY_BMCR_FDX)
 319                 mii->mii_media_active |= IFM_FDX;
 320         else
 321                 mii->mii_media_active |= IFM_HDX;
 322 }
 323
 324 static int
 325 xmphy_mii_phy_auto(struct mii_softc *sc, int waitfor)
 326 {
 327         int bmsr, anar = 0, i;
 328
 329         anar = PHY_READ(sc, XMPHY_MII_ANAR);
 330         anar |= XMPHY_ANAR_FDX | XMPHY_ANAR_HDX;
 331         PHY_WRITE(sc, XMPHY_MII_ANAR, anar);
 332         DELAY(1000);
 333         PHY_WRITE(sc, XMPHY_MII_BMCR,
 334             XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
 335
 336         if (waitfor) {
 337                 /* Wait 500ms for it to complete. */
 338                 for (i = 0; i < 500; i++) {
 339                         bmsr = PHY_READ(sc, XMPHY_MII_BMSR);
 340                         if (bmsr & XMPHY_BMSR_ACOMP)
 341                                 return (0);
 342                         DELAY(1000);
 343                 }
 344                 return (EIO);
 345         }
 346         return (EJUSTRETURN);
 347 }