Annotation of sys/dev/mii/gentbi.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: gentbi.c,v 1.3 2005/03/26 04:40:09 krw Exp $ */
! 2: /* $NetBSD: gentbi.c,v 1.12 2004/04/11 15:40:56 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998, 1999, 2000, 2001 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 generic ten-bit (1000BASE-SX) interfaces, built in to
! 72: * many Gigabit Ethernet chips.
! 73: *
! 74: * All we have to do here is correctly report speed and duplex.
! 75: */
! 76:
! 77: #if 0
! 78: #include <sys/cdefs.h>
! 79: __KERNEL_RCSID(0, "$NetBSD: gentbi.c,v 1.12 2004/04/11 15:40:56 thorpej Exp $");
! 80: #endif
! 81:
! 82: #include <sys/param.h>
! 83: #include <sys/systm.h>
! 84: #include <sys/kernel.h>
! 85: #include <sys/device.h>
! 86: #include <sys/socket.h>
! 87: #include <sys/errno.h>
! 88:
! 89: #include <net/if.h>
! 90: #include <net/if_media.h>
! 91:
! 92: #include <dev/mii/mii.h>
! 93: #include <dev/mii/miivar.h>
! 94: #include <dev/mii/miidevs.h>
! 95:
! 96: int gentbimatch(struct device *, void *, void *);
! 97: void gentbiattach(struct device *, struct device *, void *);
! 98:
! 99: struct cfattach gentbi_ca = {
! 100: sizeof(struct mii_softc), gentbimatch, gentbiattach,
! 101: mii_phy_detach, mii_phy_activate
! 102: };
! 103:
! 104: struct cfdriver gentbi_cd = {
! 105: NULL, "gentbi", DV_DULL
! 106: };
! 107:
! 108: int gentbi_service(struct mii_softc *, struct mii_data *, int);
! 109: void gentbi_status(struct mii_softc *);
! 110:
! 111: const struct mii_phy_funcs gentbi_funcs = {
! 112: gentbi_service, gentbi_status, mii_phy_reset,
! 113: };
! 114:
! 115: int
! 116: gentbimatch(struct device *parent, void *match, void *aux)
! 117: {
! 118: struct mii_attach_args *ma = aux;
! 119: struct mii_data *mii = ma->mii_data;
! 120: int bmsr, extsr;
! 121:
! 122: /*
! 123: * We match as a generic TBI if:
! 124: *
! 125: * - There is no media in the BMSR.
! 126: * - EXTSR has only 1000X.
! 127: */
! 128: bmsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR);
! 129: if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
! 130: return (0);
! 131:
! 132: extsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR);
! 133: if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
! 134: return (0);
! 135:
! 136: if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
! 137: /*
! 138: * We think this is a generic TBI. Return a match
! 139: * priority higher than ukphy, but lower than what
! 140: * specific drivers will return.
! 141: */
! 142: return (2);
! 143: }
! 144:
! 145: return (0);
! 146: }
! 147:
! 148: void
! 149: gentbiattach(struct device *parent, struct device *self, void *aux)
! 150: {
! 151: struct mii_softc *sc = (struct mii_softc *)self;
! 152: struct mii_attach_args *ma = aux;
! 153: struct mii_data *mii = ma->mii_data;
! 154:
! 155: printf(": Generic ten-bit interface, rev. %d\n",
! 156: MII_REV(ma->mii_id2));
! 157:
! 158: sc->mii_inst = mii->mii_instance;
! 159: sc->mii_phy = ma->mii_phyno;
! 160: sc->mii_funcs = &gentbi_funcs;
! 161: sc->mii_pdata = mii;
! 162: sc->mii_flags = ma->mii_flags;
! 163: sc->mii_anegticks = MII_ANEGTICKS;
! 164:
! 165: PHY_RESET(sc);
! 166:
! 167: /*
! 168: * Mask out all media in the BMSR. We only are really interested
! 169: * in "auto".
! 170: */
! 171: sc->mii_capabilities =
! 172: PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
! 173: if (sc->mii_capabilities & BMSR_EXTSTAT)
! 174: sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
! 175:
! 176: if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
! 177: (sc->mii_extcapabilities & EXTSR_MEDIAMASK))
! 178: mii_phy_add_media(sc);
! 179: }
! 180:
! 181: int
! 182: gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 183: {
! 184: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 185: int reg;
! 186:
! 187: switch (cmd) {
! 188: case MII_POLLSTAT:
! 189: /*
! 190: * If we're not polling our PHY instance, just return.
! 191: */
! 192: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 193: return (0);
! 194: break;
! 195:
! 196: case MII_MEDIACHG:
! 197: /*
! 198: * If the media indicates a different PHY instance,
! 199: * isolate ourselves.
! 200: */
! 201: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 202: reg = PHY_READ(sc, MII_BMCR);
! 203: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 204: return (0);
! 205: }
! 206:
! 207: /*
! 208: * If the interface is not up, don't do anything.
! 209: */
! 210: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 211: break;
! 212:
! 213: mii_phy_setmedia(sc);
! 214: break;
! 215:
! 216: case MII_TICK:
! 217: /*
! 218: * If we're not currently selected, just return.
! 219: */
! 220: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 221: return (0);
! 222:
! 223: if (mii_phy_tick(sc) == EJUSTRETURN)
! 224: return (0);
! 225: break;
! 226:
! 227: case MII_DOWN:
! 228: mii_phy_down(sc);
! 229: return (0);
! 230: }
! 231:
! 232: /* Update the media status. */
! 233: mii_phy_status(sc);
! 234:
! 235: /* Callback if something changed. */
! 236: mii_phy_update(sc, cmd);
! 237: return (0);
! 238: }
! 239:
! 240: void
! 241: gentbi_status(struct mii_softc *sc)
! 242: {
! 243: struct mii_data *mii = sc->mii_pdata;
! 244: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 245: int bmsr, bmcr, anlpar;
! 246:
! 247: mii->mii_media_status = IFM_AVALID;
! 248: mii->mii_media_active = IFM_ETHER;
! 249:
! 250: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 251:
! 252: if (bmsr & BMSR_LINK)
! 253: mii->mii_media_status |= IFM_ACTIVE;
! 254:
! 255: bmcr = PHY_READ(sc, MII_BMCR);
! 256: if (bmcr & BMCR_ISO) {
! 257: mii->mii_media_active |= IFM_NONE;
! 258: mii->mii_media_status = 0;
! 259: return;
! 260: }
! 261:
! 262: if (bmcr & BMCR_LOOP)
! 263: mii->mii_media_active |= IFM_LOOP;
! 264:
! 265: if (bmcr & BMCR_AUTOEN) {
! 266: /*
! 267: * The media status bits are only valid of autonegotiation
! 268: * has completed (or it's disabled).
! 269: */
! 270: if ((bmsr & BMSR_ACOMP) == 0) {
! 271: /* Erg, still trying, I guess... */
! 272: mii->mii_media_active |= IFM_NONE;
! 273: return;
! 274: }
! 275:
! 276: /*
! 277: * The media is always 1000baseSX. Check the ANLPAR to
! 278: * see if we're doing full-duplex.
! 279: */
! 280: mii->mii_media_active |= IFM_1000_SX;
! 281:
! 282: anlpar = PHY_READ(sc, MII_ANLPAR);
! 283: if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
! 284: (anlpar & ANLPAR_X_FD) != 0)
! 285: mii->mii_media_active |=
! 286: IFM_FDX;
! 287: } else
! 288: mii->mii_media_active = ife->ifm_media;
! 289: }
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