Annotation of sys/dev/mii/xmphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: xmphy.c,v 1.17 2006/12/31 15:04:33 krw Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2000
! 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/xmphy.c,v 1.1 2000/04/22 01:58:18 wpaul Exp $
! 35: */
! 36:
! 37: /*
! 38: * driver for the XaQti XMAC II's internal PHY. This is sort of
! 39: * like a 10/100 PHY, except the only thing we're really autoselecting
! 40: * here is full/half duplex. Speed is always 1000mbps.
! 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: #include <sys/errno.h>
! 49:
! 50: #include <net/if.h>
! 51: #include <net/if_media.h>
! 52:
! 53: #include <dev/mii/mii.h>
! 54: #include <dev/mii/miivar.h>
! 55: #include <dev/mii/miidevs.h>
! 56:
! 57: #include <dev/mii/xmphyreg.h>
! 58:
! 59: int xmphy_probe(struct device *, void *, void *);
! 60: void xmphy_attach(struct device *, struct device *, void *);
! 61:
! 62: struct cfattach xmphy_ca = {
! 63: sizeof(struct mii_softc), xmphy_probe, xmphy_attach, mii_phy_detach,
! 64: mii_phy_activate
! 65: };
! 66:
! 67: struct cfdriver xmphy_cd = {
! 68: NULL, "xmphy", DV_DULL
! 69: };
! 70:
! 71: int xmphy_service(struct mii_softc *, struct mii_data *, int);
! 72: void xmphy_status(struct mii_softc *);
! 73:
! 74: int xmphy_mii_phy_auto(struct mii_softc *);
! 75:
! 76: const struct mii_phy_funcs xmphy_funcs = {
! 77: xmphy_service, xmphy_status, mii_phy_reset,
! 78: };
! 79:
! 80: static const struct mii_phydesc xmphys[] = {
! 81: { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII,
! 82: MII_STR_XAQTI_XMACII },
! 83:
! 84: { MII_OUI_JATO, MII_MODEL_JATO_BASEX,
! 85: MII_STR_JATO_BASEX },
! 86:
! 87: { 0, 0,
! 88: NULL },
! 89: };
! 90:
! 91: int xmphy_probe(struct device *parent, void *match, void *aux)
! 92: {
! 93: struct mii_attach_args *ma = aux;
! 94:
! 95: if (mii_phy_match(ma, xmphys) != NULL)
! 96: return (10);
! 97:
! 98: return (0);
! 99: }
! 100:
! 101: void
! 102: xmphy_attach(struct device *parent, struct device *self, void *aux)
! 103: {
! 104: struct mii_softc *sc = (struct mii_softc *)self;
! 105: struct mii_attach_args *ma = aux;
! 106: struct mii_data *mii = ma->mii_data;
! 107: const struct mii_phydesc *mpd;
! 108:
! 109: mpd = mii_phy_match(ma, xmphys);
! 110: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
! 111:
! 112: sc->mii_inst = mii->mii_instance;
! 113: sc->mii_phy = ma->mii_phyno;
! 114: sc->mii_funcs = &xmphy_funcs;
! 115: sc->mii_pdata = mii;
! 116: sc->mii_flags = ma->mii_flags;
! 117: sc->mii_anegticks = MII_ANEGTICKS;
! 118:
! 119: sc->mii_flags |= MIIF_NOISOLATE;
! 120:
! 121: #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
! 122:
! 123: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
! 124: BMCR_ISO);
! 125:
! 126: PHY_RESET(sc);
! 127:
! 128: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
! 129: XMPHY_BMCR_FDX);
! 130: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
! 131: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
! 132:
! 133: #undef ADD
! 134: }
! 135:
! 136: int
! 137: xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 138: {
! 139: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 140: int reg;
! 141:
! 142: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
! 143: return (ENXIO);
! 144:
! 145: switch (cmd) {
! 146: case MII_POLLSTAT:
! 147: /*
! 148: * If we're not polling our PHY instance, just return.
! 149: */
! 150: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 151: return (0);
! 152: break;
! 153:
! 154: case MII_MEDIACHG:
! 155: /*
! 156: * If the media indicates a different PHY instance,
! 157: * isolate ourselves.
! 158: */
! 159: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 160: reg = PHY_READ(sc, MII_BMCR);
! 161: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 162: return (0);
! 163: }
! 164:
! 165: /*
! 166: * If the interface is not up, don't do anything.
! 167: */
! 168: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 169: break;
! 170:
! 171: switch (IFM_SUBTYPE(ife->ifm_media)) {
! 172: case IFM_AUTO:
! 173: (void) xmphy_mii_phy_auto(sc);
! 174: break;
! 175: case IFM_1000_SX:
! 176: PHY_RESET(sc);
! 177: if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
! 178: PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
! 179: PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
! 180: } else {
! 181: PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
! 182: PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
! 183: }
! 184: break;
! 185: case IFM_100_T4:
! 186: case IFM_100_TX:
! 187: case IFM_10_T:
! 188: default:
! 189: return (EINVAL);
! 190: }
! 191: break;
! 192:
! 193: case MII_TICK:
! 194: /*
! 195: * If we're not currently selected, just return.
! 196: */
! 197: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 198: return (0);
! 199:
! 200: /*
! 201: * Is the interface even up?
! 202: */
! 203: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 204: return (0);
! 205:
! 206: /*
! 207: * Only used for autonegotiation.
! 208: */
! 209: if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
! 210: break;
! 211:
! 212: /*
! 213: * Check to see if we have link. If we do, we don't
! 214: * need to restart the autonegotiation process. Read
! 215: * the BMSR twice in case it's latched.
! 216: */
! 217: reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 218: if (reg & BMSR_LINK)
! 219: break;
! 220:
! 221: /*
! 222: * Only retry autonegotiation every mii_anegticks seconds.
! 223: */
! 224: if (++sc->mii_ticks <= sc->mii_anegticks)
! 225: break;
! 226:
! 227: sc->mii_ticks = 0;
! 228: PHY_RESET(sc);
! 229:
! 230: xmphy_mii_phy_auto(sc);
! 231: break;
! 232: }
! 233:
! 234: /* Update the media status. */
! 235: mii_phy_status(sc);
! 236:
! 237: /* Callback if something changed. */
! 238: mii_phy_update(sc, cmd);
! 239: return (0);
! 240: }
! 241:
! 242: void
! 243: xmphy_status(struct mii_softc *sc)
! 244: {
! 245: struct mii_data *mii = sc->mii_pdata;
! 246: int bmsr, bmcr, anlpar;
! 247:
! 248: mii->mii_media_status = IFM_AVALID;
! 249: mii->mii_media_active = IFM_ETHER;
! 250:
! 251: bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
! 252: PHY_READ(sc, XMPHY_MII_BMSR);
! 253: if (bmsr & XMPHY_BMSR_LINK)
! 254: mii->mii_media_status |= IFM_ACTIVE;
! 255:
! 256: /* Do dummy read of extended status register. */
! 257: bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
! 258:
! 259: bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
! 260:
! 261: if (bmcr & XMPHY_BMCR_LOOP)
! 262: mii->mii_media_active |= IFM_LOOP;
! 263:
! 264:
! 265: if (bmcr & XMPHY_BMCR_AUTOEN) {
! 266: if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
! 267: if (bmsr & XMPHY_BMSR_LINK) {
! 268: mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
! 269: return;
! 270: }
! 271: /* Erg, still trying, I guess... */
! 272: mii->mii_media_active |= IFM_NONE;
! 273: return;
! 274: }
! 275:
! 276: mii->mii_media_active |= IFM_1000_SX;
! 277: anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
! 278: PHY_READ(sc, XMPHY_MII_ANLPAR);
! 279: if (anlpar & XMPHY_ANLPAR_FDX)
! 280: mii->mii_media_active |= IFM_FDX;
! 281: else
! 282: mii->mii_media_active |= IFM_HDX;
! 283: return;
! 284: }
! 285:
! 286: mii->mii_media_active |= IFM_1000_SX;
! 287: if (bmcr & XMPHY_BMCR_FDX)
! 288: mii->mii_media_active |= IFM_FDX;
! 289: else
! 290: mii->mii_media_active |= IFM_HDX;
! 291:
! 292: return;
! 293: }
! 294:
! 295:
! 296: int
! 297: xmphy_mii_phy_auto(struct mii_softc *sc)
! 298: {
! 299: int anar = 0;
! 300:
! 301: anar = PHY_READ(sc, XMPHY_MII_ANAR);
! 302: anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
! 303: PHY_WRITE(sc, XMPHY_MII_ANAR, anar);
! 304: DELAY(1000);
! 305: PHY_WRITE(sc, XMPHY_MII_BMCR,
! 306: XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
! 307:
! 308: return (EJUSTRETURN);
! 309: }
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