Annotation of sys/dev/mii/rlphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rlphy.c,v 1.27 2007/01/27 20:55:14 miod Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1998, 1999 Jason L. Wright (jason@thought.net)
! 5: * 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: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 19: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
! 20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 22: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
! 25: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 26: * POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: /*
! 30: * Driver for the internal PHY found on RTL8139 based nics, based
! 31: * on drivers for the 'exphy' (Internal 3Com phys) and 'nsphy'
! 32: * (National Semiconductor DP83840).
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/kernel.h>
! 38: #include <sys/device.h>
! 39: #include <sys/socket.h>
! 40: #include <sys/timeout.h>
! 41: #include <sys/errno.h>
! 42:
! 43: #include <net/if.h>
! 44: #include <net/if_media.h>
! 45: #include <netinet/in.h>
! 46: #include <netinet/if_ether.h>
! 47:
! 48: #include <dev/mii/mii.h>
! 49: #include <dev/mii/miivar.h>
! 50: #include <dev/mii/miidevs.h>
! 51: #include <machine/bus.h>
! 52: #include <dev/ic/rtl81x9reg.h>
! 53:
! 54: int rlphymatch(struct device *, void *, void *);
! 55: void rlphyattach(struct device *, struct device *, void *);
! 56:
! 57: struct cfattach rlphy_ca = {
! 58: sizeof(struct mii_softc), rlphymatch, rlphyattach, mii_phy_detach,
! 59: mii_phy_activate
! 60: };
! 61:
! 62: struct cfdriver rlphy_cd = {
! 63: NULL, "rlphy", DV_DULL
! 64: };
! 65:
! 66: int rlphy_service(struct mii_softc *, struct mii_data *, int);
! 67: void rlphy_status(struct mii_softc *);
! 68:
! 69: const struct mii_phy_funcs rlphy_funcs = {
! 70: rlphy_service, rlphy_status, mii_phy_reset,
! 71: };
! 72:
! 73: static const struct mii_phydesc rlphys[] = {
! 74: { MII_OUI_REALTEK, MII_MODEL_REALTEK_RTL8201L,
! 75: MII_STR_REALTEK_RTL8201L },
! 76: { MII_OUI_ICPLUS, MII_MODEL_ICPLUS_IP101,
! 77: MII_STR_ICPLUS_IP101 },
! 78:
! 79: { 0, 0,
! 80: NULL },
! 81: };
! 82: int
! 83: rlphymatch(struct device *parent, void *match, void *aux)
! 84: {
! 85: struct mii_attach_args *ma = aux;
! 86: char *devname;
! 87:
! 88: devname = parent->dv_cfdata->cf_driver->cd_name;
! 89:
! 90: if (mii_phy_match(ma, rlphys) != NULL)
! 91: return (10);
! 92:
! 93: if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
! 94: MII_MODEL(ma->mii_id2) != 0)
! 95: return (0);
! 96:
! 97: if ((strcmp(devname, "re") != 0) &&
! 98: (strcmp(devname, "rl") != 0))
! 99: return (0);
! 100:
! 101: /*
! 102: * A "real" phy should get preference, but on the 8139 there
! 103: * is no phyid register.
! 104: */
! 105: return (5);
! 106: }
! 107:
! 108: void
! 109: rlphyattach(struct device *parent, struct device *self, void *aux)
! 110: {
! 111: struct mii_softc *sc = (struct mii_softc *)self;
! 112: struct mii_attach_args *ma = aux;
! 113: struct mii_data *mii = ma->mii_data;
! 114: const struct mii_phydesc *mpd;
! 115:
! 116: mpd = mii_phy_match(ma, rlphys);
! 117: if (mpd != NULL) {
! 118: printf(": %s, rev. %d\n", mpd->mpd_name,
! 119: MII_REV(ma->mii_id2));
! 120: } else
! 121: printf(": RTL internal PHY\n");
! 122:
! 123: sc->mii_inst = mii->mii_instance;
! 124: sc->mii_phy = ma->mii_phyno;
! 125: sc->mii_funcs = &rlphy_funcs;
! 126: sc->mii_pdata = mii;
! 127: sc->mii_flags = ma->mii_flags;
! 128:
! 129: sc->mii_flags |= MIIF_NOISOLATE;
! 130:
! 131: PHY_RESET(sc);
! 132:
! 133: sc->mii_capabilities =
! 134: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
! 135: if (sc->mii_capabilities & BMSR_MEDIAMASK)
! 136: mii_phy_add_media(sc);
! 137: }
! 138:
! 139: int
! 140: rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 141: {
! 142: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 143:
! 144: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
! 145: return (ENXIO);
! 146:
! 147: /*
! 148: * Can't isolate the RTL8139 phy, so it has to be the only one.
! 149: */
! 150: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 151: panic("rlphy_service: attempt to isolate phy");
! 152:
! 153: switch (cmd) {
! 154: case MII_POLLSTAT:
! 155: break;
! 156:
! 157: case MII_MEDIACHG:
! 158: /*
! 159: * If the interface is not up, don't do anything.
! 160: */
! 161: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 162: break;
! 163:
! 164: switch (IFM_SUBTYPE(ife->ifm_media)) {
! 165: case IFM_AUTO:
! 166: /*
! 167: * If we're already in auto mode, just return.
! 168: */
! 169: if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
! 170: return (0);
! 171: (void) mii_phy_auto(sc, 0);
! 172: break;
! 173: case IFM_100_T4:
! 174: /*
! 175: * XXX Not supported as a manual setting right now.
! 176: */
! 177: return (EINVAL);
! 178: default:
! 179: /*
! 180: * BMCR data is stored in the ifmedia entry.
! 181: */
! 182: PHY_WRITE(sc, MII_ANAR,
! 183: mii_anar(ife->ifm_media));
! 184: PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
! 185: }
! 186: break;
! 187:
! 188: case MII_TICK:
! 189: /*
! 190: * Is the interface even up?
! 191: */
! 192: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 193: return (0);
! 194:
! 195: /*
! 196: * Only used for autonegotiation.
! 197: */
! 198: if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
! 199: break;
! 200:
! 201: /*
! 202: * The RealTek PHY's autonegotiation doesn't need to be
! 203: * kicked; it continues in the background.
! 204: */
! 205: break;
! 206:
! 207: case MII_DOWN:
! 208: mii_phy_down(sc);
! 209: return (0);
! 210: }
! 211:
! 212: /* Update the media status. */
! 213: mii_phy_status(sc);
! 214:
! 215: /* Callback if something changed. */
! 216: mii_phy_update(sc, cmd);
! 217: return (0);
! 218: }
! 219:
! 220: void
! 221: rlphy_status(struct mii_softc *sc)
! 222: {
! 223: struct mii_data *mii = sc->mii_pdata;
! 224: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 225: int bmsr, bmcr, anlpar;
! 226: char *devname;
! 227:
! 228: devname = sc->mii_dev.dv_parent->dv_cfdata->cf_driver->cd_name;
! 229:
! 230: mii->mii_media_status = IFM_AVALID;
! 231: mii->mii_media_active = IFM_ETHER;
! 232:
! 233: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 234: if (bmsr & BMSR_LINK)
! 235: mii->mii_media_status |= IFM_ACTIVE;
! 236:
! 237: bmcr = PHY_READ(sc, MII_BMCR);
! 238: if (bmcr & BMCR_ISO) {
! 239: mii->mii_media_active |= IFM_NONE;
! 240: mii->mii_media_status = 0;
! 241: return;
! 242: }
! 243:
! 244: if (bmcr & BMCR_LOOP)
! 245: mii->mii_media_active |= IFM_LOOP;
! 246:
! 247: if (bmcr & BMCR_AUTOEN) {
! 248: /*
! 249: * NWay autonegotiation takes the highest-order common
! 250: * bit of the ANAR and ANLPAR (i.e. best media advertised
! 251: * both by us and our link partner).
! 252: */
! 253: if ((bmsr & BMSR_ACOMP) == 0) {
! 254: /* Erg, still trying, I guess... */
! 255: mii->mii_media_active |= IFM_NONE;
! 256: return;
! 257: }
! 258:
! 259: if ((anlpar = PHY_READ(sc, MII_ANAR) &
! 260: PHY_READ(sc, MII_ANLPAR))) {
! 261: if (anlpar & ANLPAR_T4)
! 262: mii->mii_media_active |= IFM_100_T4|IFM_HDX;
! 263: else if (anlpar & ANLPAR_TX_FD)
! 264: mii->mii_media_active |= IFM_100_TX|IFM_FDX;
! 265: else if (anlpar & ANLPAR_TX)
! 266: mii->mii_media_active |= IFM_100_TX|IFM_HDX;
! 267: else if (anlpar & ANLPAR_10_FD)
! 268: mii->mii_media_active |= IFM_10_T|IFM_FDX;
! 269: else if (anlpar & ANLPAR_10)
! 270: mii->mii_media_active |= IFM_10_T|IFM_HDX;
! 271: else
! 272: mii->mii_media_active |= IFM_NONE;
! 273: return;
! 274: }
! 275:
! 276: /*
! 277: * If the other side doesn't support NWAY, then the
! 278: * best we can do is determine if we have a 10Mbps or
! 279: * 100Mbps link. There's no way to know if the link
! 280: * is full or half duplex, so we default to half duplex
! 281: * and hope that the user is clever enough to manually
! 282: * change the media settings if we're wrong.
! 283: */
! 284:
! 285: /*
! 286: * The RealTek PHY supports non-NWAY link speed
! 287: * detection, however it does not report the link
! 288: * detection results via the ANLPAR or BMSR registers.
! 289: * (What? RealTek doesn't do things the way everyone
! 290: * else does? I'm just shocked, shocked I tell you.)
! 291: * To determine the link speed, we have to do one
! 292: * of two things:
! 293: *
! 294: * - If this is a standalone RealTek RTL8201(L) PHY,
! 295: * we can determine the link speed by testing bit 0
! 296: * in the magic, vendor-specific register at offset
! 297: * 0x19.
! 298: *
! 299: * - If this is a RealTek MAC with integrated PHY, we
! 300: * can test the 'SPEED10' bit of the MAC's media status
! 301: * register.
! 302: */
! 303: if (strcmp("rl", devname) == 0 ||
! 304: strcmp("re", devname) == 0) {
! 305: if (PHY_READ(sc, RL_MEDIASTAT) & RL_MEDIASTAT_SPEED10)
! 306: mii->mii_media_active |= IFM_10_T;
! 307: else
! 308: mii->mii_media_active |= IFM_100_TX;
! 309: } else {
! 310: if (PHY_READ(sc, 0x0019) & 0x01)
! 311: mii->mii_media_active |= IFM_100_TX;
! 312: else
! 313: mii->mii_media_active |= IFM_10_T;
! 314: }
! 315: mii->mii_media_active |= IFM_HDX;
! 316: } else
! 317: mii->mii_media_active = ife->ifm_media;
! 318: }
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