sys/dev/netif/mii_layer/rlphy.c

   1 /*      $OpenBSD: rlphy.c,v 1.23 2006/05/16 02:24:45 brad Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997, 1998, 1999
   5  *      Bill Paul <wpaul@ctr.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/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $
  35  * $DragonFly: src/sys/dev/netif/mii_layer/rlphy.c,v 1.12 2006/12/22 23:26:20 swildner Exp $
  36  */
  37
  38 /*
  39  * driver for RealTek 8139 internal PHYs
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/socket.h>
  46 #include <sys/bus.h>
  47
  48 #include <net/if.h>
  49 #include <net/if_arp.h>
  50 #include <net/if_media.h>
  51
  52 #include "mii.h"
  53 #include "miivar.h"
  54 #include "miidevs.h"
  55
  56 #include "../rl/if_rlreg.h"
  57
  58 #include "miibus_if.h"
  59
  60 static int      rlphy_probe(device_t);
  61 static int      rlphy_attach(device_t);
  62 static int      rlphy_service(struct mii_softc *, struct mii_data *, int);
  63 static void     rlphy_status(struct mii_softc *);
  64
  65 static device_method_t rlphy_methods[] = {
  66         /* device interface */
  67         DEVMETHOD(device_probe,         rlphy_probe),
  68         DEVMETHOD(device_attach,        rlphy_attach),
  69         DEVMETHOD(device_detach,        ukphy_detach),
  70         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  71         { 0, 0 }
  72 };
  73
  74 static const struct mii_phydesc rlphys[] = {
  75         MII_PHYDESC(REALTEK,    RTL8201L),
  76         MII_PHYDESC(ICPLUS,     IP101),
  77         MII_PHYDESC_NULL
  78 };
  79
  80 static devclass_t rlphy_devclass;
  81
  82 static driver_t rlphy_driver = {
  83         "rlphy",
  84         rlphy_methods,
  85         sizeof(struct mii_softc)
  86 };
  87
  88 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0);
  89
  90 static int
  91 rlphy_probe(device_t dev)
  92 {
  93         struct mii_attach_args *ma = device_get_ivars(dev);
  94         const struct mii_phydesc *mpd;
  95         device_t parent;
  96
  97         /*
  98          * A "real" phy should get preference, but on the 8139 there
  99          * is no phyid register.
 100          */
 101         mpd = mii_phy_match(ma, rlphys);
 102         if (mpd != NULL) {
 103                 device_set_desc(dev, mpd->mpd_name);
 104                 return (0);
 105         }
 106
 107         /*
 108          * RealTek PHY doesn't have vendor/device ID registers:
 109          * the rl driver fakes up a return value of all zeros.
 110          */
 111         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
 112             MII_MODEL(ma->mii_id2) != 0)
 113                 return (ENXIO);
 114
 115         parent = device_get_parent(device_get_parent(dev));
 116
 117         /*
 118          * Make sure the parent is an `rl'.
 119          */
 120         if (strcmp(device_get_name(parent), "rl") != 0)
 121                 return (ENXIO);
 122
 123         device_set_desc(dev, "RealTek internal media interface");
 124
 125         return (0);
 126 }
 127
 128 static int
 129 rlphy_attach(device_t dev)
 130 {
 131         struct mii_softc        *sc;
 132         struct mii_attach_args  *ma;
 133         struct mii_data         *mii;
 134
 135         sc = device_get_softc(dev);
 136         ma = device_get_ivars(dev);
 137         mii_softc_init(sc, ma);
 138         sc->mii_dev = device_get_parent(dev);
 139         mii = device_get_softc(sc->mii_dev);
 140
 141         /*
 142          * The RealTek PHY can never be isolated, so never allow non-zero
 143          * instances!
 144          */
 145         if (mii->mii_instance != 0) {
 146                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
 147                 return(ENXIO);
 148         }
 149
 150         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 151
 152         sc->mii_inst = mii->mii_instance;
 153         sc->mii_service = rlphy_service;
 154         sc->mii_pdata = mii;
 155         mii->mii_instance++;
 156
 157         sc->mii_flags |= MIIF_NOISOLATE;
 158
 159 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 160
 161 #if 0 /* See above. */
 162         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 163             BMCR_ISO);
 164 #endif
 165
 166         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 167             MII_MEDIA_100_TX);
 168
 169         mii_phy_reset(sc);
 170
 171         /*
 172          * After PHY is reset, BMCR_AUTOEN will be cleared.
 173          * If it is *not* turned on here, mii_pollstat() will
 174          * lie about the active media until mii_mediachg() is
 175          * called(in rl_init()).
 176          */
 177         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN);
 178
 179         sc->mii_capabilities =
 180             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 181         device_printf(dev, " ");
 182         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 183                 kprintf("no media present");
 184         else
 185                 mii_phy_add_media(sc);
 186         kprintf("\n");
 187 #undef ADD
 188         MIIBUS_MEDIAINIT(sc->mii_dev);
 189         return(0);
 190 }
 191
 192 static int
 193 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 194 {
 195         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 196
 197         /*
 198          * We can't isolate the RealTek PHY, so it has to be the only one!
 199          */
 200         KASSERT(IFM_INST(ife->ifm_media) == sc->mii_inst,
 201                 ("rlphy_service: can't isolate RealTek PHY"));
 202
 203         switch (cmd) {
 204         case MII_POLLSTAT:
 205                 break;
 206
 207         case MII_MEDIACHG:
 208                 /*
 209                  * If the interface is not up, don't do anything.
 210                  */
 211                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 212                         break;
 213
 214                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_T4) {
 215                         /*
 216                          * XXX Not supported as a manual setting right now.
 217                          */
 218                         return (EINVAL);
 219                 }
 220
 221                 mii_phy_set_media(sc);
 222                 break;
 223
 224         case MII_TICK:
 225                 /*
 226                  * Is the interface even up?
 227                  */
 228                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 229                         return (0);
 230
 231                 /*
 232                  * Only used for autonegotiation.
 233                  */
 234                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 235                         break;
 236
 237                 /*
 238                  * The RealTek PHY's autonegotiation doesn't need to be
 239                  * kicked; it continues in the background.
 240                  */
 241                 break;
 242         }
 243
 244         /* Update the media status. */
 245         rlphy_status(sc);
 246
 247         /* Callback if something changed. */
 248         mii_phy_update(sc, cmd);
 249         return (0);
 250 }
 251
 252 static void
 253 rlphy_status(struct mii_softc *sc)
 254 {
 255         struct mii_data *mii = sc->mii_pdata;
 256         int bmsr, bmcr, anlpar;
 257
 258         mii->mii_media_status = IFM_AVALID;
 259         mii->mii_media_active = IFM_ETHER;
 260
 261         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 262         if (bmsr & BMSR_LINK)
 263                 mii->mii_media_status |= IFM_ACTIVE;
 264
 265         bmcr = PHY_READ(sc, MII_BMCR);
 266         if (bmcr & BMCR_ISO) {
 267                 mii->mii_media_active |= IFM_NONE;
 268                 mii->mii_media_status = 0;
 269                 return;
 270         }
 271
 272         if (bmcr & BMCR_LOOP)
 273                 mii->mii_media_active |= IFM_LOOP;
 274
 275         if (bmcr & BMCR_AUTOEN) {
 276                 device_t parent;
 277
 278                 /*
 279                  * NWay autonegotiation takes the highest-order common
 280                  * bit of the ANAR and ANLPAR (i.e. best media advertised
 281                  * both by us and our link partner).
 282                  */
 283                 if ((bmsr & BMSR_ACOMP) == 0) {
 284                         /* Erg, still trying, I guess... */
 285                         mii->mii_media_active |= IFM_NONE;
 286                         return;
 287                 }
 288
 289                 if ((anlpar = PHY_READ(sc, MII_ANAR) &
 290                     PHY_READ(sc, MII_ANLPAR))) {
 291                         if (anlpar & ANLPAR_T4)
 292                                 mii->mii_media_active |= IFM_100_T4;
 293                         else if (anlpar & ANLPAR_TX_FD)
 294                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 295                         else if (anlpar & ANLPAR_TX)
 296                                 mii->mii_media_active |= IFM_100_TX;
 297                         else if (anlpar & ANLPAR_10_FD)
 298                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
 299                         else if (anlpar & ANLPAR_10)
 300                                 mii->mii_media_active |= IFM_10_T;
 301                         else
 302                                 mii->mii_media_active |= IFM_NONE;
 303                         return;
 304                 }
 305                 /*
 306                  * If the other side doesn't support NWAY, then the
 307                  * best we can do is determine if we have a 10Mbps or
 308                  * 100Mbps link. There's no way to know if the link
 309                  * is full or half duplex, so we default to half duplex
 310                  * and hope that the user is clever enough to manually
 311                  * change the media settings if we're wrong.
 312                  */
 313
 314                 /*
 315                  * The RealTek PHY supports non-NWAY link speed
 316                  * detection, however it does not report the link
 317                  * detection results via the ANLPAR or BMSR registers.
 318                  * (What? RealTek doesn't do things the way everyone
 319                  * else does? I'm just shocked, shocked I tell you.)
 320                  * To determine the link speed, we have to do one
 321                  * of two things:
 322                  *
 323                  * - If this is a standalone RealTek RTL8201(L) PHY,
 324                  *   we can determine the link speed by testing bit 0
 325                  *   in the magic, vendor-specific register at offset
 326                  *   0x19.
 327                  *
 328                  * - If this is a RealTek MAC with integrated PHY, we
 329                  *   can test the 'SPEED10' bit of the MAC's media status
 330                  *   register.
 331                  */
 332                 parent = device_get_parent(sc->mii_dev);
 333                 if (strcmp(device_get_name(parent), "rl") != 0) {
 334                         if (PHY_READ(sc, 0x0019) & 0x01)
 335                                 mii->mii_media_active |= IFM_100_TX;
 336                         else
 337                                 mii->mii_media_active |= IFM_10_T;
 338                 } else {
 339                         if (PHY_READ(sc, RL_MEDIASTAT) &
 340                             RL_MEDIASTAT_SPEED10)
 341                                 mii->mii_media_active |= IFM_10_T;
 342                         else
 343                                 mii->mii_media_active |= IFM_100_TX;
 344                 }
 345         } else {
 346                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
 347         }
 348 }