jmphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org>
    5  * 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 unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 /*
   34  * Driver for the JMicron JMP211 10/100/1000, JMP202 10/100 PHY.
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/socket.h>
   42 #include <sys/bus.h>
   43 
   44 #include <net/if.h>
   45 #include <net/if_var.h>
   46 #include <net/if_media.h>
   47 
   48 #include <dev/mii/mii.h>
   49 #include <dev/mii/miivar.h>
   50 #include "miidevs.h"
   51 
   52 #include <dev/mii/jmphyreg.h>
   53 
   54 #include "miibus_if.h"
   55 
   56 static int      jmphy_probe(device_t);
   57 static int      jmphy_attach(device_t);
   58 static void     jmphy_reset(struct mii_softc *);
   59 static uint16_t jmphy_anar(struct ifmedia_entry *);
   60 static int      jmphy_setmedia(struct mii_softc *, struct ifmedia_entry *);
   61 
   62 static device_method_t jmphy_methods[] = {
   63         /* Device interface. */
   64         DEVMETHOD(device_probe,         jmphy_probe),
   65         DEVMETHOD(device_attach,        jmphy_attach),
   66         DEVMETHOD(device_detach,        mii_phy_detach),
   67         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   68         DEVMETHOD_END
   69 };
   70 
   71 static driver_t jmphy_driver = {
   72         "jmphy",
   73         jmphy_methods,
   74         sizeof(struct mii_softc)
   75 };
   76 
   77 DRIVER_MODULE(jmphy, miibus, jmphy_driver, 0, 0);
   78 
   79 static int      jmphy_service(struct mii_softc *, struct mii_data *, int);
   80 static void     jmphy_status(struct mii_softc *);
   81 
   82 static const struct mii_phydesc jmphys[] = {
   83         MII_PHY_DESC(JMICRON, JMP202),
   84         MII_PHY_DESC(JMICRON, JMP211),
   85         MII_PHY_END
   86 };
   87 
   88 static const struct mii_phy_funcs jmphy_funcs = {
   89         jmphy_service,
   90         jmphy_status,
   91         jmphy_reset
   92 };
   93 
   94 static int
   95 jmphy_probe(device_t dev)
   96 {
   97 
   98         return (mii_phy_dev_probe(dev, jmphys, BUS_PROBE_DEFAULT));
   99 }
  100 
  101 static int
  102 jmphy_attach(device_t dev)
  103 {
  104         u_int flags;
  105 
  106         flags = 0;
  107         if (mii_dev_mac_match(dev, "jme") &&
  108             (miibus_get_flags(dev) & MIIF_MACPRIV0) != 0)
  109                 flags |= MIIF_PHYPRIV0;
  110         mii_phy_dev_attach(dev, flags, &jmphy_funcs, 1);
  111         return (0);
  112 }
  113 
  114 static int
  115 jmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  116 {
  117         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  118 
  119         switch (cmd) {
  120         case MII_POLLSTAT:
  121                 break;
  122 
  123         case MII_MEDIACHG:
  124                 if (jmphy_setmedia(sc, ife) != EJUSTRETURN)
  125                         return (EINVAL);
  126                 break;
  127 
  128         case MII_TICK:
  129                 /*
  130                  * Only used for autonegotiation.
  131                  */
  132                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  133                         sc->mii_ticks = 0;
  134                         break;
  135                 }
  136 
  137                 /* Check for link. */
  138                 if ((PHY_READ(sc, JMPHY_SSR) & JMPHY_SSR_LINK_UP) != 0) {
  139                         sc->mii_ticks = 0;
  140                         break;
  141                 }
  142 
  143                 /* Announce link loss right after it happens. */
  144                 if (sc->mii_ticks++ == 0)
  145                         break;
  146                 if (sc->mii_ticks <= sc->mii_anegticks)
  147                         return (0);
  148 
  149                 sc->mii_ticks = 0;
  150                 (void)jmphy_setmedia(sc, ife);
  151                 break;
  152         }
  153 
  154         /* Update the media status. */
  155         PHY_STATUS(sc);
  156 
  157         /* Callback if something changed. */
  158         mii_phy_update(sc, cmd);
  159         return (0);
  160 }
  161 
  162 static void
  163 jmphy_status(struct mii_softc *sc)
  164 {
  165         struct mii_data *mii = sc->mii_pdata;
  166         int bmcr, ssr;
  167 
  168         mii->mii_media_status = IFM_AVALID;
  169         mii->mii_media_active = IFM_ETHER;
  170 
  171         ssr = PHY_READ(sc, JMPHY_SSR);
  172         if ((ssr & JMPHY_SSR_LINK_UP) != 0)
  173                 mii->mii_media_status |= IFM_ACTIVE;
  174 
  175         bmcr = PHY_READ(sc, MII_BMCR);
  176         if ((bmcr & BMCR_ISO) != 0) {
  177                 mii->mii_media_active |= IFM_NONE;
  178                 mii->mii_media_status = 0;
  179                 return;
  180         }
  181 
  182         if ((bmcr & BMCR_LOOP) != 0)
  183                 mii->mii_media_active |= IFM_LOOP;
  184 
  185         if ((ssr & JMPHY_SSR_SPD_DPLX_RESOLVED) == 0) {
  186                 /* Erg, still trying, I guess... */
  187                 mii->mii_media_active |= IFM_NONE;
  188                 return;
  189         }
  190 
  191         switch ((ssr & JMPHY_SSR_SPEED_MASK)) {
  192         case JMPHY_SSR_SPEED_1000:
  193                 mii->mii_media_active |= IFM_1000_T;
  194                 /*
  195                  * jmphy(4) got a valid link so reset mii_ticks.
  196                  * Resetting mii_ticks is needed in order to
  197                  * detect link loss after auto-negotiation.
  198                  */
  199                 sc->mii_ticks = 0;
  200                 break;
  201         case JMPHY_SSR_SPEED_100:
  202                 mii->mii_media_active |= IFM_100_TX;
  203                 sc->mii_ticks = 0;
  204                 break;
  205         case JMPHY_SSR_SPEED_10:
  206                 mii->mii_media_active |= IFM_10_T;
  207                 sc->mii_ticks = 0;
  208                 break;
  209         default:
  210                 mii->mii_media_active |= IFM_NONE;
  211                 return;
  212         }
  213 
  214         if ((ssr & JMPHY_SSR_DUPLEX) != 0)
  215                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  216         else
  217                 mii->mii_media_active |= IFM_HDX;
  218 
  219         if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) {
  220                 if ((PHY_READ(sc, MII_100T2SR) & GTSR_MS_RES) != 0)
  221                         mii->mii_media_active |= IFM_ETH_MASTER;
  222         }
  223 }
  224 
  225 static void
  226 jmphy_reset(struct mii_softc *sc)
  227 {
  228         uint16_t t2cr, val;
  229         int i;
  230 
  231         /* Disable sleep mode. */
  232         PHY_WRITE(sc, JMPHY_TMCTL,
  233             PHY_READ(sc, JMPHY_TMCTL) & ~JMPHY_TMCTL_SLEEP_ENB);
  234         PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN);
  235 
  236         for (i = 0; i < 1000; i++) {
  237                 DELAY(1);
  238                 if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0)
  239                         break;
  240         }
  241         /* Perform vendor recommended PHY calibration. */
  242         if ((sc->mii_flags & MIIF_PHYPRIV0) != 0) {
  243                 /* Select PHY test mode 1. */
  244                 t2cr = PHY_READ(sc, MII_100T2CR);
  245                 t2cr &= ~GTCR_TEST_MASK;
  246                 t2cr |= 0x2000;
  247                 PHY_WRITE(sc, MII_100T2CR, t2cr);
  248                 /* Apply calibration patch. */
  249                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_READ |
  250                     JMPHY_EXT_COMM_2);
  251                 val = PHY_READ(sc, JMPHY_SPEC_DATA);
  252                 val &= ~0x0002;
  253                 val |= 0x0010 | 0x0001;
  254                 PHY_WRITE(sc, JMPHY_SPEC_DATA, val);
  255                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_WRITE |
  256                     JMPHY_EXT_COMM_2);
  257 
  258                 /* XXX 20ms to complete recalibration. */
  259                 DELAY(20 * 1000);
  260 
  261                 PHY_READ(sc, MII_100T2CR);
  262                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_READ |
  263                     JMPHY_EXT_COMM_2);
  264                 val = PHY_READ(sc, JMPHY_SPEC_DATA);
  265                 val &= ~(0x0001 | 0x0002 | 0x0010);
  266                 PHY_WRITE(sc, JMPHY_SPEC_DATA, val);
  267                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_WRITE |
  268                     JMPHY_EXT_COMM_2);
  269                 /* Disable PHY test mode. */
  270                 PHY_READ(sc, MII_100T2CR);
  271                 t2cr &= ~GTCR_TEST_MASK;
  272                 PHY_WRITE(sc, MII_100T2CR, t2cr);
  273         }
  274 }
  275 
  276 static uint16_t
  277 jmphy_anar(struct ifmedia_entry *ife)
  278 {
  279         uint16_t anar;
  280 
  281         anar = 0;
  282         switch (IFM_SUBTYPE(ife->ifm_media)) {
  283         case IFM_AUTO:
  284                 anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10;
  285                 break;
  286         case IFM_1000_T:
  287                 break;
  288         case IFM_100_TX:
  289                 anar |= ANAR_TX | ANAR_TX_FD;
  290                 break;
  291         case IFM_10_T:
  292                 anar |= ANAR_10 | ANAR_10_FD;
  293                 break;
  294         default:
  295                 break;
  296         }
  297 
  298         return (anar);
  299 }
  300 
  301 static int
  302 jmphy_setmedia(struct mii_softc *sc, struct ifmedia_entry *ife)
  303 {
  304         uint16_t anar, bmcr, gig;
  305 
  306         gig = 0;
  307         bmcr = PHY_READ(sc, MII_BMCR);
  308         switch (IFM_SUBTYPE(ife->ifm_media)) {
  309         case IFM_AUTO:
  310                 gig |= GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX;
  311                 break;
  312         case IFM_1000_T:
  313                 gig |= GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX;
  314                 break;
  315         case IFM_100_TX:
  316         case IFM_10_T:
  317                 break;
  318         case IFM_NONE:
  319                 PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO | BMCR_PDOWN);
  320                 return (EJUSTRETURN);
  321         default:
  322                 return (EINVAL);
  323         }
  324 
  325         anar = jmphy_anar(ife);
  326         if ((IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO ||
  327             (ife->ifm_media & IFM_FDX) != 0) &&
  328             ((ife->ifm_media & IFM_FLOW) != 0 ||
  329             (sc->mii_flags & MIIF_FORCEPAUSE) != 0))
  330                 anar |= ANAR_PAUSE_TOWARDS;
  331 
  332         if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) {
  333                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
  334                         gig |= GTCR_MAN_MS;
  335                         if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
  336                                 gig |= GTCR_ADV_MS;
  337                 }
  338                 PHY_WRITE(sc, MII_100T2CR, gig);
  339         }
  340         PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA);
  341         PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_AUTOEN | BMCR_STARTNEG);
  342 
  343         return (EJUSTRETURN);
  344 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/jmphy.c

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