Annotation of sys/dev/mii/ciphy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ciphy.c,v 1.18 2006/12/31 15:04:33 krw Exp $ */
! 2: /* $FreeBSD: ciphy.c,v 1.1 2004/09/10 20:57:45 wpaul Exp $ */
! 3: /*
! 4: * Copyright (c) 2004
! 5: * Bill Paul <wpaul@windriver.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: * Driver for the Cicada CS8201 10/100/1000 copper PHY.
! 37: */
! 38:
! 39: #include <sys/param.h>
! 40: #include <sys/systm.h>
! 41: #include <sys/kernel.h>
! 42: #include <sys/device.h>
! 43: #include <sys/socket.h>
! 44: #include <sys/errno.h>
! 45:
! 46: #include <net/if.h>
! 47: #include <net/if_media.h>
! 48:
! 49: #ifdef INET
! 50: #include <netinet/in.h>
! 51: #include <netinet/if_ether.h>
! 52: #endif
! 53:
! 54: #include <dev/pci/pcivar.h>
! 55:
! 56: #include <dev/mii/mii.h>
! 57: #include <dev/mii/miivar.h>
! 58: #include <dev/mii/miidevs.h>
! 59:
! 60: #include <dev/mii/ciphyreg.h>
! 61:
! 62: #include <machine/bus.h>
! 63:
! 64: int ciphymatch(struct device *, void *, void *);
! 65: void ciphyattach(struct device *, struct device *, void *);
! 66:
! 67: struct cfattach ciphy_ca = {
! 68: sizeof(struct mii_softc),
! 69: ciphymatch,
! 70: ciphyattach,
! 71: mii_phy_detach,
! 72: mii_phy_activate
! 73: };
! 74:
! 75: struct cfdriver ciphy_cd = {
! 76: NULL, "ciphy", DV_DULL
! 77: };
! 78:
! 79: int ciphy_service(struct mii_softc *, struct mii_data *, int);
! 80: void ciphy_status(struct mii_softc *);
! 81: void ciphy_reset(struct mii_softc *);
! 82: void ciphy_fixup(struct mii_softc *);
! 83:
! 84: const struct mii_phy_funcs ciphy_funcs = {
! 85: ciphy_service, ciphy_status, ciphy_reset,
! 86: };
! 87:
! 88: static const struct mii_phydesc ciphys[] = {
! 89: { MII_OUI_CICADA, MII_MODEL_CICADA_CS8201,
! 90: MII_STR_CICADA_CS8201 },
! 91: { MII_OUI_CICADA, MII_MODEL_CICADA_CS8201A,
! 92: MII_STR_CICADA_CS8201A },
! 93: { MII_OUI_CICADA, MII_MODEL_CICADA_CS8201B,
! 94: MII_STR_CICADA_CS8201B },
! 95: { MII_OUI_xxCICADA, MII_MODEL_xxCICADA_CS8201B,
! 96: MII_STR_xxCICADA_CS8201B },
! 97:
! 98: { 0, 0,
! 99: NULL },
! 100: };
! 101:
! 102: int
! 103: ciphymatch(struct device *parent, void *match, void *aux)
! 104: {
! 105: struct mii_attach_args *ma = aux;
! 106:
! 107: if (mii_phy_match(ma, ciphys) != NULL)
! 108: return (10);
! 109:
! 110: return (0);
! 111: }
! 112:
! 113: void
! 114: ciphyattach(struct device *parent, struct device *self, void *aux)
! 115: {
! 116: struct mii_softc *sc = (struct mii_softc *)self;
! 117: struct mii_attach_args *ma = aux;
! 118: struct mii_data *mii = ma->mii_data;
! 119: const struct mii_phydesc *mpd;
! 120:
! 121: mpd = mii_phy_match(ma, ciphys);
! 122: printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
! 123:
! 124: sc->mii_inst = mii->mii_instance;
! 125: sc->mii_phy = ma->mii_phyno;
! 126: sc->mii_funcs = &ciphy_funcs;
! 127: sc->mii_pdata = mii;
! 128: sc->mii_flags = ma->mii_flags;
! 129: sc->mii_anegticks = MII_ANEGTICKS;
! 130:
! 131: sc->mii_flags |= MIIF_NOISOLATE;
! 132:
! 133: PHY_RESET(sc);
! 134:
! 135: sc->mii_capabilities =
! 136: PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
! 137: if (sc->mii_capabilities & BMSR_EXTSTAT)
! 138: sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
! 139: if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
! 140: (sc->mii_capabilities & EXTSR_MEDIAMASK))
! 141: mii_phy_add_media(sc);
! 142: }
! 143:
! 144: int
! 145: ciphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
! 146: {
! 147: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 148: int reg, speed, gig;
! 149:
! 150: switch (cmd) {
! 151: case MII_POLLSTAT:
! 152: /*
! 153: * If we're not polling our PHY instance, just return.
! 154: */
! 155: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 156: return (0);
! 157: break;
! 158:
! 159: case MII_MEDIACHG:
! 160: /*
! 161: * If the media indicates a different PHY instance,
! 162: * isolate ourselves.
! 163: */
! 164: if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
! 165: reg = PHY_READ(sc, MII_BMCR);
! 166: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 167: return (0);
! 168: }
! 169:
! 170: /*
! 171: * If the interface is not up, don't do anything.
! 172: */
! 173: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 174: break;
! 175:
! 176: ciphy_fixup(sc); /* XXX hardware bug work-around */
! 177:
! 178: switch (IFM_SUBTYPE(ife->ifm_media)) {
! 179: case IFM_AUTO:
! 180: if (mii_phy_auto(sc, 0) == EJUSTRETURN)
! 181: return (0);
! 182: break;
! 183: case IFM_1000_T:
! 184: speed = CIPHY_S1000;
! 185: goto setit;
! 186: case IFM_100_TX:
! 187: speed = CIPHY_S100;
! 188: goto setit;
! 189: case IFM_10_T:
! 190: speed = CIPHY_S10;
! 191: setit:
! 192: if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
! 193: speed |= CIPHY_BMCR_FDX;
! 194: gig = CIPHY_1000CTL_AFD;
! 195: } else {
! 196: gig = CIPHY_1000CTL_AHD;
! 197: }
! 198:
! 199: PHY_WRITE(sc, CIPHY_MII_1000CTL, 0);
! 200: PHY_WRITE(sc, CIPHY_MII_BMCR, speed);
! 201: PHY_WRITE(sc, CIPHY_MII_ANAR, CIPHY_SEL_TYPE);
! 202:
! 203: if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
! 204: break;
! 205:
! 206: PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
! 207: PHY_WRITE(sc, CIPHY_MII_BMCR,
! 208: speed|CIPHY_BMCR_AUTOEN|CIPHY_BMCR_STARTNEG);
! 209:
! 210: if (mii->mii_media.ifm_media & IFM_ETH_MASTER)
! 211: gig |= CIPHY_1000CTL_MSE|CIPHY_1000CTL_MSC;
! 212: PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
! 213: break;
! 214: case IFM_NONE:
! 215: PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN);
! 216: break;
! 217: case IFM_100_T4:
! 218: default:
! 219: return (EINVAL);
! 220: }
! 221: break;
! 222:
! 223: case MII_TICK:
! 224: /*
! 225: * If we're not currently selected, just return.
! 226: */
! 227: if (IFM_INST(ife->ifm_media) != sc->mii_inst)
! 228: return (0);
! 229:
! 230: if (mii_phy_tick(sc) == EJUSTRETURN)
! 231: return (0);
! 232: break;
! 233: }
! 234:
! 235: /* Update the media status. */
! 236: mii_phy_status(sc);
! 237:
! 238: /*
! 239: * Callback if something changed. Note that we need to poke
! 240: * apply fixups for certain PHY revs.
! 241: */
! 242: if (sc->mii_media_active != mii->mii_media_active ||
! 243: sc->mii_media_status != mii->mii_media_status ||
! 244: cmd == MII_MEDIACHG) {
! 245: ciphy_fixup(sc);
! 246: }
! 247: mii_phy_update(sc, cmd);
! 248: return (0);
! 249: }
! 250:
! 251: void
! 252: ciphy_status(struct mii_softc *sc)
! 253: {
! 254: struct mii_data *mii = sc->mii_pdata;
! 255: int bmsr, bmcr, gsr;
! 256:
! 257: mii->mii_media_status = IFM_AVALID;
! 258: mii->mii_media_active = IFM_ETHER;
! 259:
! 260: bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 261:
! 262: if (bmsr & BMSR_LINK)
! 263: mii->mii_media_status |= IFM_ACTIVE;
! 264:
! 265: bmcr = PHY_READ(sc, CIPHY_MII_BMCR);
! 266:
! 267: if (bmcr & CIPHY_BMCR_LOOP)
! 268: mii->mii_media_active |= IFM_LOOP;
! 269:
! 270: if (bmcr & CIPHY_BMCR_AUTOEN) {
! 271: if ((bmsr & CIPHY_BMSR_ACOMP) == 0) {
! 272: /* Erg, still trying, I guess... */
! 273: mii->mii_media_active |= IFM_NONE;
! 274: return;
! 275: }
! 276: }
! 277:
! 278: bmsr = PHY_READ(sc, CIPHY_MII_AUXCSR);
! 279: switch (bmsr & CIPHY_AUXCSR_SPEED) {
! 280: case CIPHY_SPEED10:
! 281: mii->mii_media_active |= IFM_10_T;
! 282: break;
! 283: case CIPHY_SPEED100:
! 284: mii->mii_media_active |= IFM_100_TX;
! 285: break;
! 286: case CIPHY_SPEED1000:
! 287: mii->mii_media_active |= IFM_1000_T;
! 288: break;
! 289: default:
! 290: printf("%s: unknown PHY speed %x\n",
! 291: sc->mii_dev.dv_xname, bmsr & CIPHY_AUXCSR_SPEED);
! 292: break;
! 293: }
! 294:
! 295: if (bmsr & CIPHY_AUXCSR_FDX)
! 296: mii->mii_media_active |= IFM_FDX;
! 297: else
! 298: mii->mii_media_active |= IFM_HDX;
! 299:
! 300: gsr = PHY_READ(sc, CIPHY_MII_1000STS);
! 301: if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
! 302: gsr & CIPHY_1000STS_MSR)
! 303: mii->mii_media_active |= IFM_ETH_MASTER;
! 304: }
! 305:
! 306: void
! 307: ciphy_reset(struct mii_softc *sc)
! 308: {
! 309: mii_phy_reset(sc);
! 310: DELAY(1000);
! 311: }
! 312:
! 313: #define PHY_SETBIT(x, y, z) \
! 314: PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
! 315: #define PHY_CLRBIT(x, y, z) \
! 316: PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
! 317:
! 318: void
! 319: ciphy_fixup(struct mii_softc *sc)
! 320: {
! 321: uint16_t model;
! 322: uint16_t status, speed;
! 323:
! 324: model = MII_MODEL(PHY_READ(sc, CIPHY_MII_PHYIDR2));
! 325: status = PHY_READ(sc, CIPHY_MII_AUXCSR);
! 326: speed = status & CIPHY_AUXCSR_SPEED;
! 327:
! 328: if (strcmp(sc->mii_dev.dv_parent->dv_cfdata->cf_driver->cd_name, "nfe") == 0) {
! 329: /* need to set for 2.5V RGMII for NVIDIA adapters */
! 330: PHY_SETBIT(sc, CIPHY_MII_ECTL1, CIPHY_INTSEL_RGMII);
! 331: PHY_SETBIT(sc, CIPHY_MII_ECTL1, CIPHY_IOVOL_2500MV);
! 332: }
! 333:
! 334: switch (model) {
! 335: case MII_MODEL_CICADA_CS8201:
! 336:
! 337: /* Turn off "aux mode" (whatever that means) */
! 338: PHY_SETBIT(sc, CIPHY_MII_AUXCSR, CIPHY_AUXCSR_MDPPS);
! 339:
! 340: /*
! 341: * Work around speed polling bug in VT3119/VT3216
! 342: * when using MII in full duplex mode.
! 343: */
! 344: if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
! 345: (status & CIPHY_AUXCSR_FDX)) {
! 346: PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
! 347: } else {
! 348: PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
! 349: }
! 350:
! 351: /* Enable link/activity LED blink. */
! 352: PHY_SETBIT(sc, CIPHY_MII_LED, CIPHY_LED_LINKACTBLINK);
! 353:
! 354: break;
! 355:
! 356: case MII_MODEL_CICADA_CS8201A:
! 357: case MII_MODEL_CICADA_CS8201B:
! 358:
! 359: /*
! 360: * Work around speed polling bug in VT3119/VT3216
! 361: * when using MII in full duplex mode.
! 362: */
! 363: if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
! 364: (status & CIPHY_AUXCSR_FDX)) {
! 365: PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
! 366: } else {
! 367: PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
! 368: }
! 369:
! 370: break;
! 371: default:
! 372: printf("%s: unknown CICADA PHY model %x\n",
! 373: sc->mii_dev.dv_xname, model);
! 374: break;
! 375: }
! 376: }
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