Annotation of sys/dev/mii/nsphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: nsphy.c,v 1.20 2006/12/27 19:11:09 kettenis Exp $ */
! 2: /* $NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
! 43: *
! 44: * Redistribution and use in source and binary forms, with or without
! 45: * modification, are permitted provided that the following conditions
! 46: * are met:
! 47: * 1. Redistributions of source code must retain the above copyright
! 48: * notice, this list of conditions and the following disclaimer.
! 49: * 2. Redistributions in binary form must reproduce the above copyright
! 50: * notice, this list of conditions and the following disclaimer in the
! 51: * documentation and/or other materials provided with the distribution.
! 52: * 3. All advertising materials mentioning features or use of this software
! 53: * must display the following acknowledgement:
! 54: * This product includes software developed by Manuel Bouyer.
! 55: * 4. The name of the author may not be used to endorse or promote products
! 56: * derived from this software without specific prior written permission.
! 57: *
! 58: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 59: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 60: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 61: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 62: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 63: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 64: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 65: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 66: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 67: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 68: */
! 69:
! 70: /*
! 71: * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
! 72: * Data Sheet available from www.national.com
! 73: */
! 74:
! 75: #include <sys/param.h>
! 76: #include <sys/systm.h>
! 77: #include <sys/kernel.h>
! 78: #include <sys/device.h>
! 79: #include <sys/socket.h>
! 80: #include <sys/errno.h>
! 81:
! 82: #include <net/if.h>
! 83: #include <net/if_media.h>
! 84:
! 85: #include <dev/mii/mii.h>
! 86: #include <dev/mii/miivar.h>
! 87: #include <dev/mii/miidevs.h>
! 88:
! 89: #include <dev/mii/nsphyreg.h>
! 90:
! 91: int nsphymatch(struct device *, void *, void *);
! 92: void nsphyattach(struct device *, struct device *, void *);
! 93:
! 94: struct cfattach nsphy_ca = {
! 95: sizeof(struct mii_softc), nsphymatch, nsphyattach, mii_phy_detach,
! 96: mii_phy_activate
! 97: };
! 98:
! 99: struct cfdriver nsphy_cd = {
! 100: NULL, "nsphy", DV_DULL
! 101: };
! 102:
! 103: int nsphy_service(struct mii_softc *, struct mii_data *, int);
! 104: void nsphy_status(struct mii_softc *);
! 105: void nsphy_reset(struct mii_softc *);
! 106:
! 107: const struct mii_phy_funcs nsphy_funcs = {
! 108: nsphy_service, nsphy_status, nsphy_reset,
! 109: };
! 110:
! 111: static const struct mii_phydesc nsphys[] = {
! 112: { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83840,
! 113: MII_STR_NATSEMI_DP83840 },
! 114:
! 115: { 0, 0,
! 116: NULL },
! 117: };
! 118:
! 119: int
! 120: nsphymatch(struct device *parent, void *match, void *aux)
! 121: {
! 122: struct mii_attach_args *ma = aux;
! 123:
! 124: if (mii_phy_match(ma, nsphys) != NULL)
! 125: return (10);
! 126:
! 127: return (0);
! 128: }
! 129:
! 130: void
! 131: nsphyattach(struct device *parent, struct device *self, void *aux)
! 132: {
! 133: struct mii_softc *sc = (struct mii_softc *)self;
! 134: struct mii_attach_args *ma = aux;
! 135: struct mii_data *mii = ma->mii_data;
! 136: const struct mii_phydesc *mpd;
! 137:
! 138: mpd = mii_phy_match(ma, nsphys);
! 139: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
! 140:
! 141: sc->mii_inst = mii->mii_instance;
! 142: sc->mii_phy = ma->mii_phyno;
! 143: sc->mii_funcs = &nsphy_funcs;
! 144: sc->mii_pdata = mii;
! 145: sc->mii_flags = ma->mii_flags;
! 146: sc->mii_anegticks = MII_ANEGTICKS;
! 147:
! 148: PHY_RESET(sc);
! 149:
! 150: sc->mii_capabilities =
! 151: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
! 152: if (sc->mii_capabilities & BMSR_MEDIAMASK)
! 153: mii_phy_add_media(sc);
! 154: }
! 155:
! 156: int
! 157: nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 158: {
! 159: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 160: int reg;
! 161:
! 162: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
! 163: return (ENXIO);
! 164:
! 165: switch (cmd) {
! 166: case MII_POLLSTAT:
! 167: /*
! 168: * If we're not polling our PHY instance, just return.
! 169: */
! 170: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 171: return (0);
! 172: break;
! 173:
! 174: case MII_MEDIACHG:
! 175: /*
! 176: * If the media indicates a different PHY instance,
! 177: * isolate ourselves.
! 178: */
! 179: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 180: reg = PHY_READ(sc, MII_BMCR);
! 181: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 182: return (0);
! 183: }
! 184:
! 185: /*
! 186: * If the interface is not up, don't do anything.
! 187: */
! 188: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 189: break;
! 190:
! 191: reg = PHY_READ(sc, MII_NSPHY_PCR);
! 192:
! 193: /*
! 194: * Set up the PCR to use LED4 to indicate full-duplex
! 195: * in both 10baseT and 100baseTX modes.
! 196: */
! 197: reg |= PCR_LED4MODE;
! 198:
! 199: /*
! 200: * Make sure Carrier Integrity Monitor function is
! 201: * disabled (normal for Node operation, but sometimes
! 202: * it's not set?!)
! 203: */
! 204: reg |= PCR_CIMDIS;
! 205:
! 206: /*
! 207: * Make sure "force link good" is set to normal mode.
! 208: * It's only intended for debugging.
! 209: */
! 210: reg |= PCR_FLINK100;
! 211:
! 212: /*
! 213: * Mystery bits which are supposedly `reserved',
! 214: * but we seem to need to set them when the PHY
! 215: * is connected to some interfaces!
! 216: */
! 217: reg |= PCR_CONGCTRL | PCR_TXREADYSEL;
! 218:
! 219: PHY_WRITE(sc, MII_NSPHY_PCR, reg);
! 220:
! 221: mii_phy_setmedia(sc);
! 222: break;
! 223:
! 224: case MII_TICK:
! 225: /*
! 226: * If we're not currently selected, just return.
! 227: */
! 228: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 229: return (0);
! 230:
! 231: if (mii_phy_tick(sc) == EJUSTRETURN)
! 232: return (0);
! 233: break;
! 234:
! 235: case MII_DOWN:
! 236: mii_phy_down(sc);
! 237: return (0);
! 238: }
! 239:
! 240: /* Update the media status. */
! 241: mii_phy_status(sc);
! 242:
! 243: /* Callback if something changed. */
! 244: mii_phy_update(sc, cmd);
! 245: return (0);
! 246: }
! 247:
! 248: void
! 249: nsphy_status(struct mii_softc *sc)
! 250: {
! 251: struct mii_data *mii = sc->mii_pdata;
! 252: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 253: int bmsr, bmcr, par, anlpar;
! 254:
! 255: mii->mii_media_status = IFM_AVALID;
! 256: mii->mii_media_active = IFM_ETHER;
! 257:
! 258: bmsr = PHY_READ(sc, MII_BMSR) |
! 259: PHY_READ(sc, MII_BMSR);
! 260: if (bmsr & BMSR_LINK)
! 261: mii->mii_media_status |= IFM_ACTIVE;
! 262:
! 263: bmcr = PHY_READ(sc, MII_BMCR);
! 264: if (bmcr & BMCR_ISO) {
! 265: mii->mii_media_active |= IFM_NONE;
! 266: mii->mii_media_status = 0;
! 267: return;
! 268: }
! 269:
! 270: if (bmcr & BMCR_LOOP)
! 271: mii->mii_media_active |= IFM_LOOP;
! 272:
! 273: if (bmcr & BMCR_AUTOEN) {
! 274: /*
! 275: * The PAR status bits are only valid of autonegotiation
! 276: * has completed (or it's disabled).
! 277: */
! 278: if ((bmsr & BMSR_ACOMP) == 0) {
! 279: /* Erg, still trying, I guess... */
! 280: mii->mii_media_active |= IFM_NONE;
! 281: return;
! 282: }
! 283:
! 284: /*
! 285: * Argh. The PAR doesn't seem to indicate duplex mode
! 286: * properly! Determine media based on link partner's
! 287: * advertised capabilities.
! 288: */
! 289: if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
! 290: anlpar = PHY_READ(sc, MII_ANAR) &
! 291: PHY_READ(sc, MII_ANLPAR);
! 292: if (anlpar & ANLPAR_T4)
! 293: mii->mii_media_active |= IFM_100_T4;
! 294: else if (anlpar & ANLPAR_TX_FD)
! 295: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
! 296: else if (anlpar & ANLPAR_TX)
! 297: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
! 298: else if (anlpar & ANLPAR_10_FD)
! 299: mii->mii_media_active |= IFM_10_T|IFM_FDX;
! 300: else if (anlpar & ANLPAR_10)
! 301: mii->mii_media_active |= IFM_10_T|IFM_HDX;
! 302: else
! 303: mii->mii_media_active |= IFM_NONE;
! 304: return;
! 305: }
! 306:
! 307: /*
! 308: * Link partner is not capable of autonegotiation.
! 309: * We will never be in full-duplex mode if this is
! 310: * the case, so reading the PAR is OK.
! 311: */
! 312: par = PHY_READ(sc, MII_NSPHY_PAR);
! 313: if (par & PAR_10)
! 314: mii->mii_media_active |= IFM_10_T;
! 315: else
! 316: mii->mii_media_active |= IFM_100_TX;
! 317: mii->mii_media_active |= IFM_HDX;
! 318: } else
! 319: mii->mii_media_active = ife->ifm_media;
! 320: }
! 321:
! 322: void
! 323: nsphy_reset(struct mii_softc *sc)
! 324: {
! 325: int anar;
! 326:
! 327: mii_phy_reset(sc);
! 328: anar = PHY_READ(sc, MII_ANAR);
! 329: anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR));
! 330: PHY_WRITE(sc, MII_ANAR, anar);
! 331: }
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