Annotation of sys/dev/mii/nsgphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: nsgphy.c,v 1.18 2006/12/27 19:11:09 kettenis Exp $ */
! 2: /*
! 3: * Copyright (c) 2001 Wind River Systems
! 4: * Copyright (c) 2001
! 5: * Bill Paul <wpaul@bsdi.com>. 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: */
! 35:
! 36: /*
! 37: * Driver for the National Semiconductor DP83891 and DP83861
! 38: * 10/100/1000 PHYs.
! 39: * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
! 40: *
! 41: * The DP83891 is the older NatSemi gigE PHY which isn't being sold
! 42: * anymore. The DP83861 is its replacement, which is an 'enhanced'
! 43: * firmware driven component. The major difference between the
! 44: * two is that the 83891 can't generate interrupts, while the
! 45: * 83861 can. (I think it wasn't originally designed to do this, but
! 46: * it can now thanks to firmware updates.) The 83861 also allows
! 47: * access to its internal RAM via indirect register access.
! 48: */
! 49:
! 50: #include <sys/param.h>
! 51: #include <sys/systm.h>
! 52: #include <sys/kernel.h>
! 53: #include <sys/device.h>
! 54: #include <sys/socket.h>
! 55:
! 56: #include <net/if.h>
! 57: #include <net/if_media.h>
! 58:
! 59: #include <dev/mii/mii.h>
! 60: #include <dev/mii/miivar.h>
! 61: #include <dev/mii/miidevs.h>
! 62:
! 63: #include <dev/mii/nsgphyreg.h>
! 64:
! 65: int nsgphymatch(struct device*, void *, void *);
! 66: void nsgphyattach(struct device *, struct device *, void *);
! 67:
! 68: struct cfattach nsgphy_ca = {
! 69: sizeof(struct mii_softc), nsgphymatch, nsgphyattach, mii_phy_detach,
! 70: mii_phy_activate
! 71: };
! 72:
! 73: struct cfdriver nsgphy_cd = {
! 74: NULL, "nsgphy", DV_DULL
! 75: };
! 76:
! 77: int nsgphy_service(struct mii_softc *, struct mii_data *, int);
! 78: void nsgphy_status(struct mii_softc *);
! 79:
! 80: const struct mii_phy_funcs nsgphy_funcs = {
! 81: nsgphy_service, nsgphy_status, mii_phy_reset,
! 82: };
! 83:
! 84: static const struct mii_phydesc nsgphys[] = {
! 85: { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83861,
! 86: MII_STR_NATSEMI_DP83861 },
! 87: { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83891,
! 88: MII_STR_NATSEMI_DP83891 },
! 89:
! 90: { 0, 0,
! 91: NULL },
! 92: };
! 93:
! 94: int
! 95: nsgphymatch(struct device *parent, void *match, void *aux)
! 96: {
! 97: struct mii_attach_args *ma = aux;
! 98:
! 99: if (mii_phy_match(ma, nsgphys) != NULL)
! 100: return (10);
! 101:
! 102: return (0);
! 103: }
! 104:
! 105: void
! 106: nsgphyattach(struct device *parent, struct device *self, void *aux)
! 107: {
! 108: struct mii_softc *sc = (struct mii_softc *)self;
! 109: struct mii_attach_args *ma = aux;
! 110: struct mii_data *mii = ma->mii_data;
! 111: const struct mii_phydesc *mpd;
! 112: int anar;
! 113:
! 114: mpd = mii_phy_match(ma, nsgphys);
! 115: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
! 116:
! 117: sc->mii_inst = mii->mii_instance;
! 118: sc->mii_phy = ma->mii_phyno;
! 119: sc->mii_funcs = &nsgphy_funcs;
! 120: sc->mii_pdata = mii;
! 121: sc->mii_flags = ma->mii_flags;
! 122: sc->mii_anegticks = MII_ANEGTICKS;
! 123:
! 124: PHY_RESET(sc);
! 125:
! 126: sc->mii_capabilities =
! 127: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
! 128: if (sc->mii_capabilities & BMSR_EXTSTAT)
! 129: sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
! 130:
! 131: /*
! 132: * The PHY seems to have the 10baseT BMSR bits
! 133: * hard-wired to 0, even though the device supports
! 134: * 10baseT. What we do instead is read the post-reset
! 135: * ANAR, who's 10baseT-related bits are set by strapping
! 136: * pin 180, and fake the BMSR bits.
! 137: */
! 138: anar = PHY_READ(sc, MII_ANAR);
! 139: if (anar & ANAR_10)
! 140: sc->mii_capabilities |= (BMSR_10THDX & ma->mii_capmask);
! 141: if (anar & ANAR_10_FD)
! 142: sc->mii_capabilities |= (BMSR_10TFDX & ma->mii_capmask);
! 143:
! 144: if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
! 145: (sc->mii_extcapabilities & EXTSR_MEDIAMASK))
! 146: mii_phy_add_media(sc);
! 147: }
! 148:
! 149: int
! 150: nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 151: {
! 152: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 153: int reg;
! 154:
! 155: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
! 156: return (ENXIO);
! 157:
! 158: switch (cmd) {
! 159: case MII_POLLSTAT:
! 160: /*
! 161: * If we're not polling our PHY instance, just return.
! 162: */
! 163: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 164: return (0);
! 165: break;
! 166:
! 167: case MII_MEDIACHG:
! 168: /*
! 169: * If the media indicates a different PHY instance,
! 170: * isolate ourselves.
! 171: */
! 172: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 173: reg = PHY_READ(sc, MII_BMCR);
! 174: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 175: return (0);
! 176: }
! 177:
! 178: /*
! 179: * If the interface is not up, don't do anything.
! 180: */
! 181: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 182: break;
! 183:
! 184: mii_phy_setmedia(sc);
! 185: break;
! 186:
! 187: case MII_TICK:
! 188: /*
! 189: * If we're not currently selected, just return.
! 190: */
! 191: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 192: return (0);
! 193:
! 194: if (mii_phy_tick(sc) == EJUSTRETURN)
! 195: return (0);
! 196: break;
! 197: case MII_DOWN:
! 198: mii_phy_down(sc);
! 199: return (0);
! 200: }
! 201:
! 202: /* Update the media status. */
! 203: mii_phy_status(sc);
! 204:
! 205: /* Callback if something changed. */
! 206: mii_phy_update(sc, cmd);
! 207: return (0);
! 208: }
! 209:
! 210: void
! 211: nsgphy_status(struct mii_softc *sc)
! 212: {
! 213: struct mii_data *mii = sc->mii_pdata;
! 214: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 215: int bmsr, bmcr, physup, gtsr;
! 216:
! 217: mii->mii_media_status = IFM_AVALID;
! 218: mii->mii_media_active = IFM_ETHER;
! 219:
! 220: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 221:
! 222: physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
! 223:
! 224: if (physup & PHY_SUP_LINK)
! 225: mii->mii_media_status |= IFM_ACTIVE;
! 226:
! 227: bmcr = PHY_READ(sc, MII_BMCR);
! 228: if (bmcr & BMCR_ISO) {
! 229: mii->mii_media_active |= IFM_NONE;
! 230: mii->mii_media_status = 0;
! 231: return;
! 232: }
! 233:
! 234: if (bmcr & BMCR_LOOP)
! 235: mii->mii_media_active |= IFM_LOOP;
! 236:
! 237: if (bmcr & BMCR_AUTOEN) {
! 238: if ((bmsr & BMSR_ACOMP) == 0) {
! 239: /* Erg, still trying, I guess... */
! 240: mii->mii_media_active |= IFM_NONE;
! 241: return;
! 242: }
! 243:
! 244: switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) {
! 245: case PHY_SUP_SPEED1:
! 246: mii->mii_media_active |= IFM_1000_T;
! 247: gtsr = PHY_READ(sc, MII_100T2SR);
! 248: if (gtsr & GTSR_MS_RES)
! 249: mii->mii_media_active |= IFM_ETH_MASTER;
! 250: break;
! 251:
! 252: case PHY_SUP_SPEED0:
! 253: mii->mii_media_active |= IFM_100_TX;
! 254: break;
! 255:
! 256: case 0:
! 257: mii->mii_media_active |= IFM_10_T;
! 258: break;
! 259:
! 260: default:
! 261: mii->mii_media_active |= IFM_NONE;
! 262: mii->mii_media_status = 0;
! 263: return;
! 264: }
! 265:
! 266: if (physup & PHY_SUP_DUPLEX)
! 267: mii->mii_media_active |= IFM_FDX;
! 268: else
! 269: mii->mii_media_active |= IFM_HDX;
! 270: } else
! 271: mii->mii_media_active = ife->ifm_media;
! 272: }
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