sys/dev/netif/mii_layer/pnphy.c

   1 /*
   2  * Copyright (c) 1997, 1998, 1999
   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/pnphy.c,v 1.1.2.1 2002/11/08 21:53:49 semenu Exp $
  33  * $DragonFly: src/sys/dev/netif/mii_layer/pnphy.c,v 1.13 2008/07/22 10:59:16 sephe Exp $
  34  */
  35
  36 /*
  37  * Pseudo-driver for media selection on the Lite-On PNIC 82c168
  38  * chip. The NWAY support on this chip is horribly broken, so we
  39  * only support manual mode selection. This is lame, but getting
  40  * NWAY to work right is amazingly difficult.
  41  */
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/kernel.h>
  46 #include <sys/socket.h>
  47 #include <sys/errno.h>
  48 #include <sys/module.h>
  49 #include <sys/bus.h>
  50
  51 #include <net/if.h>
  52 #include <net/if_arp.h>
  53 #include <net/if_media.h>
  54
  55 #include "mii.h"
  56 #include "miivar.h"
  57 #include "miidevs.h"
  58
  59 #include <machine/clock.h>
  60
  61 #include "../dc/if_dcreg.h"
  62
  63 #include "miibus_if.h"
  64
  65 #define DC_SETBIT(sc, reg, x)                           \
  66         CSR_WRITE_4(sc, reg,                            \
  67                 CSR_READ_4(sc, reg) | x)
  68
  69 #define DC_CLRBIT(sc, reg, x)                           \
  70         CSR_WRITE_4(sc, reg,                            \
  71                 CSR_READ_4(sc, reg) & ~x)
  72
  73 static int pnphy_probe          (device_t);
  74 static int pnphy_attach         (device_t);
  75
  76 static device_method_t pnphy_methods[] = {
  77         /* device interface */
  78         DEVMETHOD(device_probe,         pnphy_probe),
  79         DEVMETHOD(device_attach,        pnphy_attach),
  80         DEVMETHOD(device_detach,        ukphy_detach),
  81         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  82         { 0, 0 }
  83 };
  84
  85 static devclass_t pnphy_devclass;
  86
  87 static driver_t pnphy_driver = {
  88         "pnphy",
  89         pnphy_methods,
  90         sizeof(struct mii_softc)
  91 };
  92
  93 DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
  94
  95 static int      pnphy_service(struct mii_softc *, struct mii_data *, int);
  96 static void     pnphy_status(struct mii_softc *);
  97
  98 static int
  99 pnphy_probe(device_t dev)
 100 {
 101         struct mii_attach_args *ma;
 102
 103         ma = device_get_ivars(dev);
 104
 105         /*
 106          * The dc driver will report the 82c168 vendor and device
 107          * ID to let us know that it wants us to attach.
 108          */
 109         if (ma->mii_id1 != DC_VENDORID_LO ||
 110             ma->mii_id2 != DC_DEVICEID_82C168)
 111                 return(ENXIO);
 112
 113         device_set_desc(dev, "PNIC 82c168 media interface");
 114
 115         return (0);
 116 }
 117
 118 static int
 119 pnphy_attach(device_t dev)
 120 {
 121         struct mii_softc *sc;
 122         struct mii_attach_args *ma;
 123         struct mii_data *mii;
 124
 125         sc = device_get_softc(dev);
 126         ma = device_get_ivars(dev);
 127         mii_softc_init(sc, ma);
 128         sc->mii_dev = device_get_parent(dev);
 129         mii = device_get_softc(sc->mii_dev);
 130         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 131
 132         sc->mii_inst = mii->mii_instance;
 133         sc->mii_service = pnphy_service;
 134         sc->mii_pdata = mii;
 135
 136         sc->mii_flags |= MIIF_NOISOLATE;
 137         mii->mii_instance++;
 138
 139 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 140
 141         sc->mii_capabilities =
 142             BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
 143         sc->mii_capabilities &= ma->mii_capmask;
 144         device_printf(dev, " ");
 145         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 146                 kprintf("no media present");
 147         else
 148                 mii_phy_add_media(sc);
 149         kprintf("\n");
 150
 151         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 152             MII_MEDIA_NONE);
 153
 154         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 155             MII_MEDIA_100_TX);
 156
 157 #undef ADD
 158
 159         MIIBUS_MEDIAINIT(sc->mii_dev);
 160         return(0);
 161 }
 162
 163 static int
 164 pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 165 {
 166         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 167
 168         switch (cmd) {
 169         case MII_POLLSTAT:
 170                 /*
 171                  * If we're not polling our PHY instance, just return.
 172                  */
 173                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 174                         return (0);
 175                 }
 176                 break;
 177
 178         case MII_MEDIACHG:
 179                 /*
 180                  * If the media indicates a different PHY instance,
 181                  * isolate ourselves.
 182                  */
 183                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 184                         return (0);
 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                 sc->mii_flags = 0;
 193
 194                 switch (IFM_SUBTYPE(ife->ifm_media)) {
 195                 case IFM_AUTO:
 196                         /* NWAY is busted on this chip */
 197                 case IFM_100_T4:
 198                         /*
 199                          * XXX Not supported as a manual setting right now.
 200                          */
 201                         return (EINVAL);
 202                 case IFM_100_TX:
 203                         mii->mii_media_active = IFM_ETHER|IFM_100_TX;
 204                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
 205                                 mii->mii_media_active |= IFM_FDX;
 206                         MIIBUS_STATCHG(sc->mii_dev);
 207                         return(0);
 208                         break;
 209                 case IFM_10_T:
 210                         mii->mii_media_active = IFM_ETHER|IFM_10_T;
 211                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
 212                                 mii->mii_media_active |= IFM_FDX;
 213                         MIIBUS_STATCHG(sc->mii_dev);
 214                         return(0);
 215                         break;
 216                 default:
 217                         return(EINVAL);
 218                         break;
 219                 }
 220                 break;
 221
 222         case MII_TICK:
 223                 /*
 224                  * If we're not currently selected, just return.
 225                  */
 226                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 227                         return (0);
 228
 229                 /*
 230                  * Is the interface even up?
 231                  */
 232                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 233                         return (0);
 234
 235                 /*
 236                  * Only used for autonegotiation.
 237                  */
 238                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 239                         break;
 240
 241                 /*
 242                  * This PHY's autonegotiation doesn't need to be kicked.
 243                  */
 244                 return(0);
 245         }
 246
 247         /* Update the media status. */
 248         pnphy_status(sc);
 249
 250         /* Callback if something changed. */
 251         mii_phy_update(sc, cmd);
 252         return (0);
 253 }
 254
 255 static void
 256 pnphy_status(struct mii_softc *sc)
 257 {
 258         struct mii_data *mii = sc->mii_pdata;
 259         struct dc_softc *dc_sc = mii->mii_ifp->if_softc;
 260         int reg;
 261
 262         mii->mii_media_status = IFM_AVALID;
 263         mii->mii_media_active = IFM_ETHER;
 264
 265         reg = CSR_READ_4(dc_sc, DC_ISR);
 266
 267         if (!(reg & DC_ISR_LINKFAIL))
 268                 mii->mii_media_status |= IFM_ACTIVE;
 269
 270         if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
 271                 mii->mii_media_active |= IFM_10_T;
 272         else
 273                 mii->mii_media_active |= IFM_100_TX;
 274         if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
 275                 mii->mii_media_active |= IFM_FDX;
 276 }