nsphy.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*      $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $       */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-2-Clause
    5  *
    6  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
    7  * All rights reserved.
    8  *
    9  * This code is derived from software contributed to The NetBSD Foundation
   10  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   11  * NASA Ames Research Center.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   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 THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 /*-
   36  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   48  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   49  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   50  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   51  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   52  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   53  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   54  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   55  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   56  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   57  */
   58 
   59 #include <sys/cdefs.h>
   60 __FBSDID("$FreeBSD$");
   61 
   62 /*
   63  * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
   64  * Data Sheet available from www.national.com
   65  */
   66 
   67 #include <sys/param.h>
   68 #include <sys/systm.h>
   69 #include <sys/kernel.h>
   70 #include <sys/socket.h>
   71 #include <sys/errno.h>
   72 #include <sys/module.h>
   73 #include <sys/bus.h>
   74 
   75 #include <net/if.h>
   76 #include <net/if_var.h>
   77 #include <net/if_media.h>
   78 
   79 #include <dev/mii/mii.h>
   80 #include <dev/mii/miivar.h>
   81 #include "miidevs.h"
   82 
   83 #include <dev/mii/nsphyreg.h>
   84 
   85 #include "miibus_if.h"
   86 
   87 static int nsphy_probe(device_t);
   88 static int nsphy_attach(device_t);
   89 
   90 static device_method_t nsphy_methods[] = {
   91         /* device interface */
   92         DEVMETHOD(device_probe,         nsphy_probe),
   93         DEVMETHOD(device_attach,        nsphy_attach),
   94         DEVMETHOD(device_detach,        mii_phy_detach),
   95         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   96         DEVMETHOD_END
   97 };
   98 
   99 static devclass_t nsphy_devclass;
  100 
  101 static driver_t nsphy_driver = {
  102         "nsphy",
  103         nsphy_methods,
  104         sizeof(struct mii_softc)
  105 };
  106 
  107 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
  108 
  109 static int      nsphy_service(struct mii_softc *, struct mii_data *, int);
  110 static void     nsphy_status(struct mii_softc *);
  111 static void     nsphy_reset(struct mii_softc *);
  112 
  113 static const struct mii_phydesc nsphys[] = {
  114         MII_PHY_DESC(xxNATSEMI, DP83840),
  115         MII_PHY_END
  116 };
  117 
  118 static const struct mii_phy_funcs nsphy_funcs = {
  119         nsphy_service,
  120         nsphy_status,
  121         nsphy_reset
  122 };
  123 
  124 static int
  125 nsphy_probe(device_t dev)
  126 {
  127 
  128         return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT));
  129 }
  130 
  131 static int
  132 nsphy_attach(device_t dev)
  133 {
  134         u_int flags;
  135 
  136         flags = MIIF_NOMANPAUSE;
  137         /*
  138          * Am79C971 wedge when isolating all of their external PHYs.
  139          */
  140         if (mii_dev_mac_match(dev,"pcn"))
  141                 flags |= MIIF_NOISOLATE;
  142         mii_phy_dev_attach(dev, flags, &nsphy_funcs, 1);
  143         return (0);
  144 }
  145 
  146 static int
  147 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  148 {
  149         int reg;
  150 
  151         switch (cmd) {
  152         case MII_POLLSTAT:
  153                 break;
  154 
  155         case MII_MEDIACHG:
  156                 reg = PHY_READ(sc, MII_NSPHY_PCR);
  157 
  158                 /*
  159                  * Set up the PCR to use LED4 to indicate full-duplex
  160                  * in both 10baseT and 100baseTX modes.
  161                  */
  162                 reg |= PCR_LED4MODE;
  163 
  164                 /*
  165                  * Make sure Carrier Integrity Monitor function is
  166                  * disabled (normal for Node operation, but sometimes
  167                  * it's not set?!)
  168                  */
  169                 reg |= PCR_CIMDIS;
  170 
  171                 /*
  172                  * Make sure "force link good" is set to normal mode.
  173                  * It's only intended for debugging.
  174                  */
  175                 reg |= PCR_FLINK100;
  176 
  177                 /*
  178                  * Mystery bits which are supposedly `reserved',
  179                  * but we seem to need to set them when the PHY
  180                  * is connected to some interfaces:
  181                  *
  182                  * 0x0400 is needed for fxp
  183                  *        (Intel EtherExpress Pro 10+/100B, 82557 chip)
  184                  *        (nsphy with a DP83840 chip)
  185                  * 0x0100 may be needed for some other card
  186                  */
  187                 reg |= 0x0100 | 0x0400;
  188 
  189                 if (mii_phy_mac_match(sc, "fxp"))
  190                         PHY_WRITE(sc, MII_NSPHY_PCR, reg);
  191 
  192                 mii_phy_setmedia(sc);
  193                 break;
  194 
  195         case MII_TICK:
  196                 if (mii_phy_tick(sc) == EJUSTRETURN)
  197                         return (0);
  198                 break;
  199         }
  200 
  201         /* Update the media status. */
  202         PHY_STATUS(sc);
  203 
  204         /* Callback if something changed. */
  205         mii_phy_update(sc, cmd);
  206         return (0);
  207 }
  208 
  209 static void
  210 nsphy_status(struct mii_softc *sc)
  211 {
  212         struct mii_data *mii = sc->mii_pdata;
  213         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  214         int bmsr, bmcr, par, anlpar;
  215 
  216         mii->mii_media_status = IFM_AVALID;
  217         mii->mii_media_active = IFM_ETHER;
  218 
  219         bmsr = PHY_READ(sc, MII_BMSR) |
  220             PHY_READ(sc, MII_BMSR);
  221         if (bmsr & BMSR_LINK)
  222                 mii->mii_media_status |= IFM_ACTIVE;
  223 
  224         bmcr = PHY_READ(sc, MII_BMCR);
  225         if (bmcr & BMCR_ISO) {
  226                 mii->mii_media_active |= IFM_NONE;
  227                 mii->mii_media_status = 0;
  228                 return;
  229         }
  230 
  231         if (bmcr & BMCR_LOOP)
  232                 mii->mii_media_active |= IFM_LOOP;
  233 
  234         if (bmcr & BMCR_AUTOEN) {
  235                 /*
  236                  * The PAR status bits are only valid if autonegotiation
  237                  * has completed (or it's disabled).
  238                  */
  239                 if ((bmsr & BMSR_ACOMP) == 0) {
  240                         /* Erg, still trying, I guess... */
  241                         mii->mii_media_active |= IFM_NONE;
  242                         return;
  243                 }
  244 
  245                 /*
  246                  * Argh.  The PAR doesn't seem to indicate duplex mode
  247                  * properly!  Determine media based on link partner's
  248                  * advertised capabilities.
  249                  */
  250                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  251                         anlpar = PHY_READ(sc, MII_ANAR) &
  252                             PHY_READ(sc, MII_ANLPAR);
  253                         if (anlpar & ANLPAR_TX_FD)
  254                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  255                         else if (anlpar & ANLPAR_T4)
  256                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  257                         else if (anlpar & ANLPAR_TX)
  258                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  259                         else if (anlpar & ANLPAR_10_FD)
  260                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  261                         else if (anlpar & ANLPAR_10)
  262                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  263                         else
  264                                 mii->mii_media_active |= IFM_NONE;
  265                         if ((mii->mii_media_active & IFM_FDX) != 0)
  266                                 mii->mii_media_active |=
  267                                     mii_phy_flowstatus(sc);
  268                         return;
  269                 }
  270 
  271                 /*
  272                  * Link partner is not capable of autonegotiation.
  273                  * We will never be in full-duplex mode if this is
  274                  * the case, so reading the PAR is OK.
  275                  */
  276                 par = PHY_READ(sc, MII_NSPHY_PAR);
  277                 if (par & PAR_10)
  278                         mii->mii_media_active |= IFM_10_T;
  279                 else
  280                         mii->mii_media_active |= IFM_100_TX;
  281                 mii->mii_media_active |= IFM_HDX;
  282         } else
  283                 mii->mii_media_active = ife->ifm_media;
  284 }
  285 
  286 static void
  287 nsphy_reset(struct mii_softc *sc)
  288 {
  289         struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
  290         int reg, i;
  291 
  292         if (sc->mii_flags & MIIF_NOISOLATE)
  293                 reg = BMCR_RESET;
  294         else
  295                 reg = BMCR_RESET | BMCR_ISO;
  296         PHY_WRITE(sc, MII_BMCR, reg);
  297 
  298         /*
  299          * It is best to allow a little time for the reset to settle
  300          * in before we start polling the BMCR again.  Notably, the
  301          * DP83840A manuals state that there should be a 500us delay
  302          * between asserting software reset and attempting MII serial
  303          * operations.  Be conservative.
  304          */
  305         DELAY(1000);
  306 
  307         /*
  308          * Wait another 2s for it to complete.
  309          * This is only a little overkill as under normal circumstances
  310          * the PHY can take up to 1s to complete reset.
  311          * This is also a bit odd because after a reset, the BMCR will
  312          * clear the reset bit and simply reports 0 even though the reset
  313          * is not yet complete.
  314          */
  315         for (i = 0; i < 1000; i++) {
  316                 reg = PHY_READ(sc, MII_BMCR);
  317                 if (reg != 0 && (reg & BMCR_RESET) == 0)
  318                         break;
  319                 DELAY(2000);
  320         }
  321 
  322         if ((sc->mii_flags & MIIF_NOISOLATE) == 0) {
  323                 if ((ife == NULL && sc->mii_inst != 0) ||
  324                     (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))
  325                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  326         }
  327 }
Cache object: 02b1f761e05505cfb4298886583887de
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/dev/mii/nsphy.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/nsphy.c
