Annotation of sys/dev/mii/amphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: amphy.c,v 1.15 2006/12/31 15:04:33 krw Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1997, 1998, 1999
! 5: * Bill Paul <wpaul@ee.columbia.edu>. 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, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Bill Paul.
! 18: * 4. Neither the name of the author nor the names of any co-contributors
! 19: * may be used to endorse or promote products derived from this software
! 20: * without specific prior written permission.
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
! 23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 25: * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
! 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
! 32: * THE POSSIBILITY OF SUCH DAMAGE.
! 33: *
! 34: * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $
! 35: */
! 36:
! 37: /*
! 38: * driver for AMD AM79c873 PHYs
! 39: * This driver also works for the Davicom DM9101 PHY, which appears to
! 40: * be an AM79c873 workalike.
! 41: */
! 42:
! 43: #include <sys/param.h>
! 44: #include <sys/systm.h>
! 45: #include <sys/kernel.h>
! 46: #include <sys/device.h>
! 47: #include <sys/socket.h>
! 48:
! 49: #include <net/if.h>
! 50: #include <net/if_media.h>
! 51:
! 52: #include <dev/mii/mii.h>
! 53: #include <dev/mii/miivar.h>
! 54: #include <dev/mii/miidevs.h>
! 55:
! 56: #include <dev/mii/amphyreg.h>
! 57:
! 58: int amphymatch(struct device *, void *, void *);
! 59: void amphyattach(struct device *, struct device *, void *);
! 60:
! 61: struct cfattach amphy_ca = {
! 62: sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach,
! 63: mii_phy_activate
! 64: };
! 65:
! 66: struct cfdriver amphy_cd = {
! 67: NULL, "amphy", DV_DULL
! 68: };
! 69:
! 70: int amphy_service(struct mii_softc *, struct mii_data *, int);
! 71: void amphy_status(struct mii_softc *);
! 72:
! 73: const struct mii_phy_funcs amphy_funcs = {
! 74: amphy_service, amphy_status, mii_phy_reset,
! 75: };
! 76:
! 77: static const struct mii_phydesc amphys[] = {
! 78: { MII_OUI_xxAMD, MII_MODEL_xxAMD_79C873,
! 79: MII_STR_xxAMD_79C873 },
! 80: { MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101,
! 81: MII_STR_xxDAVICOM_DM9101 },
! 82: { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9102,
! 83: MII_STR_DAVICOM_DM9102 },
! 84: { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9601,
! 85: MII_STR_DAVICOM_DM9601 },
! 86: { MII_OUI_xxALTIMA, MII_MODEL_AMD_79C875phy,
! 87: MII_STR_AMD_79C875phy },
! 88:
! 89: { 0, 0,
! 90: NULL },
! 91: };
! 92:
! 93: int
! 94: amphymatch(struct device *parent, void *match, void *aux)
! 95: {
! 96: struct mii_attach_args *ma = aux;
! 97:
! 98: if (mii_phy_match(ma, amphys) != NULL)
! 99: return (10);
! 100:
! 101: return (0);
! 102: }
! 103:
! 104: void
! 105: amphyattach(struct device *parent, struct device *self, void *aux)
! 106: {
! 107: struct mii_softc *sc = (struct mii_softc *)self;
! 108: struct mii_attach_args *ma = aux;
! 109: struct mii_data *mii = ma->mii_data;
! 110: const struct mii_phydesc *mpd;
! 111:
! 112: mpd = mii_phy_match(ma, amphys);
! 113: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
! 114:
! 115: sc->mii_inst = mii->mii_instance;
! 116: sc->mii_phy = ma->mii_phyno;
! 117: sc->mii_funcs = &hy_funcs;
! 118: sc->mii_pdata = mii;
! 119: sc->mii_flags = ma->mii_flags;
! 120:
! 121: sc->mii_flags |= MIIF_NOISOLATE;
! 122:
! 123: PHY_RESET(sc);
! 124:
! 125: sc->mii_capabilities =
! 126: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
! 127: if (sc->mii_capabilities & BMSR_MEDIAMASK)
! 128: mii_phy_add_media(sc);
! 129: }
! 130:
! 131: int
! 132: amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 133: {
! 134: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 135: int reg;
! 136:
! 137: switch (cmd) {
! 138: case MII_POLLSTAT:
! 139: /*
! 140: * If we're not polling our PHY instance, just return.
! 141: */
! 142: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 143: return (0);
! 144: break;
! 145:
! 146: case MII_MEDIACHG:
! 147: /*
! 148: * If the media indicates a different PHY instance,
! 149: * isolate ourselves.
! 150: */
! 151: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 152: reg = PHY_READ(sc, MII_BMCR);
! 153: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 154: return (0);
! 155: }
! 156:
! 157: /*
! 158: * If the interface is not up, don't do anything.
! 159: */
! 160: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 161: break;
! 162:
! 163: mii_phy_setmedia(sc);
! 164: break;
! 165:
! 166: case MII_TICK:
! 167: /*
! 168: * If we're not currently selected, just return.
! 169: */
! 170: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 171: return (0);
! 172:
! 173: if (mii_phy_tick(sc) == EJUSTRETURN)
! 174: return (0);
! 175: break;
! 176: case MII_DOWN:
! 177: mii_phy_down(sc);
! 178: return (0);
! 179: }
! 180:
! 181: /* Update the media status. */
! 182: mii_phy_status(sc);
! 183:
! 184: /* Callback if something changed. */
! 185: mii_phy_update(sc, cmd);
! 186: return (0);
! 187: }
! 188:
! 189: void
! 190: amphy_status(struct mii_softc *sc)
! 191: {
! 192: struct mii_data *mii = sc->mii_pdata;
! 193: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 194: int bmsr, bmcr, par, anlpar;
! 195:
! 196: mii->mii_media_status = IFM_AVALID;
! 197: mii->mii_media_active = IFM_ETHER;
! 198:
! 199: bmsr = PHY_READ(sc, MII_BMSR) |
! 200: PHY_READ(sc, MII_BMSR);
! 201: if (bmsr & BMSR_LINK)
! 202: mii->mii_media_status |= IFM_ACTIVE;
! 203:
! 204: bmcr = PHY_READ(sc, MII_BMCR);
! 205: if (bmcr & BMCR_ISO) {
! 206: mii->mii_media_active |= IFM_NONE;
! 207: mii->mii_media_status = 0;
! 208: return;
! 209: }
! 210:
! 211: if (bmcr & BMCR_LOOP)
! 212: mii->mii_media_active |= IFM_LOOP;
! 213:
! 214: if (bmcr & BMCR_AUTOEN) {
! 215: /*
! 216: * The PAR status bits are only valid of autonegotiation
! 217: * has completed (or it's disabled).
! 218: */
! 219: if ((bmsr & BMSR_ACOMP) == 0) {
! 220: /* Erg, still trying, I guess... */
! 221: mii->mii_media_active |= IFM_NONE;
! 222: return;
! 223: }
! 224:
! 225: if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
! 226: anlpar = PHY_READ(sc, MII_ANAR) &
! 227: PHY_READ(sc, MII_ANLPAR);
! 228: if (anlpar & ANLPAR_T4)
! 229: mii->mii_media_active |= IFM_100_T4|IFM_HDX;
! 230: else if (anlpar & ANLPAR_TX_FD)
! 231: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
! 232: else if (anlpar & ANLPAR_TX)
! 233: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
! 234: else if (anlpar & ANLPAR_10_FD)
! 235: mii->mii_media_active |= IFM_10_T|IFM_FDX;
! 236: else if (anlpar & ANLPAR_10)
! 237: mii->mii_media_active |= IFM_10_T|IFM_HDX;
! 238: else
! 239: mii->mii_media_active |= IFM_NONE;
! 240: return;
! 241: }
! 242:
! 243: /*
! 244: * Link partner is not capable of autonegotiation.
! 245: */
! 246: par = PHY_READ(sc, MII_AMPHY_DSCSR);
! 247: if (par & DSCSR_100FDX)
! 248: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
! 249: else if (par & DSCSR_100HDX)
! 250: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
! 251: else if (par & DSCSR_10FDX)
! 252: mii->mii_media_active |= IFM_10_T|IFM_HDX;
! 253: else if (par & DSCSR_10HDX)
! 254: mii->mii_media_active |= IFM_10_T|IFM_HDX;
! 255: } else
! 256: mii->mii_media_active = ife->ifm_media;
! 257: }
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