sys/dev/netif/mii_layer/nsphy.c

   1 /*      $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1998, 1999 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  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the NetBSD
  22  *      Foundation, Inc. and its contributors.
  23  * 4. Neither the name of The NetBSD Foundation nor the names of its
  24  *    contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  * $FreeBSD: src/sys/dev/mii/nsphy.c,v 1.2.2.5 2001/06/08 19:58:33 semenu Exp $
  40  * $DragonFly: src/sys/dev/netif/mii_layer/nsphy.c,v 1.10 2006/12/22 23:26:20 swildner Exp $
  41  */
  42
  43 /*
  44  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by Manuel Bouyer.
  57  * 4. The name of the author may not be used to endorse or promote products
  58  *    derived from this software without specific prior written permission.
  59  *
  60  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  61  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  62  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  63  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  64  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  65  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  66  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  67  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  68  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  69  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  70  */
  71
  72 /*
  73  * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
  74  * Data Sheet available from www.national.com
  75  */
  76
  77 #include <sys/param.h>
  78 #include <sys/systm.h>
  79 #include <sys/kernel.h>
  80 #include <sys/socket.h>
  81 #include <sys/errno.h>
  82 #include <sys/module.h>
  83 #include <sys/bus.h>
  84
  85 #include <net/if.h>
  86 #include <net/if_media.h>
  87
  88 #include "mii.h"
  89 #include "miivar.h"
  90 #include "miidevs.h"
  91
  92 #include "nsphyreg.h"
  93
  94 #include "miibus_if.h"
  95
  96 static int nsphy_probe          (device_t);
  97 static int nsphy_attach         (device_t);
  98
  99 static device_method_t nsphy_methods[] = {
 100         /* device interface */
 101         DEVMETHOD(device_probe,         nsphy_probe),
 102         DEVMETHOD(device_attach,        nsphy_attach),
 103         DEVMETHOD(device_detach,        ukphy_detach),
 104         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 105         { 0, 0 }
 106 };
 107
 108 static const struct mii_phydesc nsphys[] = {
 109         MII_PHYDESC(NATSEMI,    DP83840),
 110         MII_PHYDESC_NULL
 111 };
 112
 113 static devclass_t nsphy_devclass;
 114
 115 static driver_t nsphy_driver = {
 116         "nsphy",
 117         nsphy_methods,
 118         sizeof(struct mii_softc)
 119 };
 120
 121 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
 122
 123 static int      nsphy_service(struct mii_softc *, struct mii_data *, int);
 124 static void     nsphy_status(struct mii_softc *);
 125 static void     nsphy_reset(struct mii_softc *);
 126
 127 static int
 128 nsphy_probe(device_t dev)
 129 {
 130         struct mii_attach_args *ma = device_get_ivars(dev);
 131         const struct mii_phydesc *mpd;
 132
 133         mpd = mii_phy_match(ma, nsphys);
 134         if (mpd != NULL) {
 135                 device_set_desc(dev, mpd->mpd_name);
 136                 return (0);
 137         }
 138         return (ENXIO);
 139 }
 140
 141 static int
 142 nsphy_attach(device_t dev)
 143 {
 144         struct mii_softc *sc;
 145         struct mii_attach_args *ma;
 146         struct mii_data *mii;
 147
 148         sc = device_get_softc(dev);
 149         ma = device_get_ivars(dev);
 150         mii_softc_init(sc, ma);
 151         sc->mii_dev = device_get_parent(dev);
 152         mii = device_get_softc(sc->mii_dev);
 153         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 154
 155         sc->mii_inst = mii->mii_instance;
 156         sc->mii_service = nsphy_service;
 157         sc->mii_reset = nsphy_reset;
 158         sc->mii_pdata = mii;
 159
 160 #ifdef foo
 161         /*
 162          * i82557 wedges if all of its PHYs are isolated!
 163          */
 164         if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
 165             "fxp") == 0 && mii->mii_instance == 0)
 166 #endif
 167
 168         sc->mii_flags |= MIIF_NOISOLATE;
 169         mii->mii_instance++;
 170
 171 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 172
 173 #if 0
 174         /* Can't do this on the i82557! */
 175         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 176             BMCR_ISO);
 177 #endif
 178         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 179             MII_MEDIA_100_TX);
 180
 181         nsphy_reset(sc);
 182
 183         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 184         device_printf(dev, " ");
 185         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 186                 kprintf("no media present");
 187         else
 188                 mii_phy_add_media(sc);
 189         kprintf("\n");
 190 #undef ADD
 191
 192         MIIBUS_MEDIAINIT(sc->mii_dev);
 193         return(0);
 194 }
 195
 196 static int
 197 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 198 {
 199         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 200         int reg;
 201
 202         switch (cmd) {
 203         case MII_POLLSTAT:
 204                 /*
 205                  * If we're not polling our PHY instance, just return.
 206                  */
 207                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 208                         return (0);
 209                 break;
 210
 211         case MII_MEDIACHG:
 212                 /*
 213                  * If the media indicates a different PHY instance,
 214                  * isolate ourselves.
 215                  */
 216                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 217                         reg = PHY_READ(sc, MII_BMCR);
 218                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 219                         return (0);
 220                 }
 221
 222                 /*
 223                  * If the interface is not up, don't do anything.
 224                  */
 225                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 226                         break;
 227
 228                 reg = PHY_READ(sc, MII_NSPHY_PCR);
 229
 230                 /*
 231                  * Set up the PCR to use LED4 to indicate full-duplex
 232                  * in both 10baseT and 100baseTX modes.
 233                  */
 234                 reg |= PCR_LED4MODE;
 235
 236                 /*
 237                  * Make sure Carrier Intgrity Monitor function is
 238                  * disabled (normal for Node operation, but sometimes
 239                  * it's not set?!)
 240                  */
 241                 reg |= PCR_CIMDIS;
 242
 243                 /*
 244                  * Make sure "force link good" is set to normal mode.
 245                  * It's only intended for debugging.
 246                  */
 247                 reg |= PCR_FLINK100;
 248
 249                 /*
 250                  * Mystery bits which are supposedly `reserved',
 251                  * but we seem to need to set them when the PHY
 252                  * is connected to some interfaces:
 253                  *
 254                  * 0x0400 is needed for fxp
 255                  *        (Intel EtherExpress Pro 10+/100B, 82557 chip)
 256                  *        (nsphy with a DP83840 chip)
 257                  * 0x0100 may be needed for some other card
 258                  */
 259                 reg |= PCR_CONGCTRL | PCR_TXREADYSEL;
 260
 261                 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
 262                     "fxp") == 0)
 263                         PHY_WRITE(sc, MII_NSPHY_PCR, reg);
 264
 265                 mii_phy_set_media(sc);
 266                 break;
 267
 268         case MII_TICK:
 269                 /*
 270                  * If we're not currently selected, just return.
 271                  */
 272                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 273                         return (0);
 274
 275                 if (mii_phy_tick(sc) == EJUSTRETURN)
 276                         return (0);
 277                 break;
 278         }
 279
 280         /* Update the media status. */
 281         nsphy_status(sc);
 282
 283         /* Callback if something changed. */
 284         mii_phy_update(sc, cmd);
 285         return (0);
 286 }
 287
 288 static void
 289 nsphy_status(struct mii_softc *sc)
 290 {
 291         struct mii_data *mii = sc->mii_pdata;
 292         int bmsr, bmcr, par, anlpar;
 293
 294         mii->mii_media_status = IFM_AVALID;
 295         mii->mii_media_active = IFM_ETHER;
 296
 297         bmsr = PHY_READ(sc, MII_BMSR) |
 298             PHY_READ(sc, MII_BMSR);
 299         if (bmsr & BMSR_LINK)
 300                 mii->mii_media_status |= IFM_ACTIVE;
 301
 302         bmcr = PHY_READ(sc, MII_BMCR);
 303         if (bmcr & BMCR_ISO) {
 304                 mii->mii_media_active |= IFM_NONE;
 305                 mii->mii_media_status = 0;
 306                 return;
 307         }
 308
 309         if (bmcr & BMCR_LOOP)
 310                 mii->mii_media_active |= IFM_LOOP;
 311
 312         if (bmcr & BMCR_AUTOEN) {
 313                 /*
 314                  * The PAR status bits are only valid of autonegotiation
 315                  * has completed (or it's disabled).
 316                  */
 317                 if ((bmsr & BMSR_ACOMP) == 0) {
 318                         /* Erg, still trying, I guess... */
 319                         mii->mii_media_active |= IFM_NONE;
 320                         return;
 321                 }
 322
 323                 /*
 324                  * Argh.  The PAR doesn't seem to indicate duplex mode
 325                  * properly!  Determine media based on link partner's
 326                  * advertised capabilities.
 327                  */
 328                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
 329                         anlpar = PHY_READ(sc, MII_ANAR) &
 330                             PHY_READ(sc, MII_ANLPAR);
 331                         if (anlpar & ANLPAR_T4)
 332                                 mii->mii_media_active |= IFM_100_T4;
 333                         else if (anlpar & ANLPAR_TX_FD)
 334                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 335                         else if (anlpar & ANLPAR_TX)
 336                                 mii->mii_media_active |= IFM_100_TX;
 337                         else if (anlpar & ANLPAR_10_FD)
 338                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
 339                         else if (anlpar & ANLPAR_10)
 340                                 mii->mii_media_active |= IFM_10_T;
 341                         else
 342                                 mii->mii_media_active |= IFM_NONE;
 343                         return;
 344                 }
 345
 346                 /*
 347                  * Link partner is not capable of autonegotiation.
 348                  * We will never be in full-duplex mode if this is
 349                  * the case, so reading the PAR is OK.
 350                  */
 351                 par = PHY_READ(sc, MII_NSPHY_PAR);
 352                 if (par & PAR_10)
 353                         mii->mii_media_active |= IFM_10_T;
 354                 else
 355                         mii->mii_media_active |= IFM_100_TX;
 356 #if 0
 357                 if (par & PAR_FDX)
 358                         mii->mii_media_active |= IFM_FDX;
 359 #endif
 360         } else
 361                 mii->mii_media_active |= mii->mii_media.ifm_cur->ifm_media;
 362 }
 363
 364 static void
 365 nsphy_reset(struct mii_softc *sc)
 366 {
 367         int anar;
 368
 369         mii_phy_reset(sc);
 370         anar = PHY_READ(sc, MII_ANAR);
 371         anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR));
 372         PHY_WRITE(sc, MII_ANAR, anar);
 373 }