Annotation of sys/dev/mii/mii.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mii.c,v 1.18 2005/07/23 01:42:16 brad Exp $ */
! 2: /* $NetBSD: mii.c,v 1.19 2000/02/02 17:09:44 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998, 2000 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: * MII bus layer, glues MII-capable network interface drivers to sharable
! 43: * PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
! 44: * plus some NetBSD extensions.
! 45: */
! 46:
! 47: #include <sys/param.h>
! 48: #include <sys/device.h>
! 49: #include <sys/systm.h>
! 50: #include <sys/socket.h>
! 51:
! 52: #include <net/if.h>
! 53: #include <net/if_media.h>
! 54:
! 55: #include <dev/mii/mii.h>
! 56: #include <dev/mii/miivar.h>
! 57:
! 58: int mii_print(void *, const char *);
! 59: int mii_submatch(struct device *, void *, void *);
! 60:
! 61: #define MIICF_PHY 0 /* cf_loc index */
! 62: #define MIICF_PHY_DEFAULT (-1) /* default phy device */
! 63:
! 64: /*
! 65: * Helper function used by network interface drivers, attaches PHYs
! 66: * to the network interface driver parent.
! 67: */
! 68: void
! 69: mii_attach(struct device *parent, struct mii_data *mii, int capmask,
! 70: int phyloc, int offloc, int flags)
! 71: {
! 72: struct mii_attach_args ma;
! 73: struct mii_softc *child;
! 74: int bmsr, offset = 0;
! 75: int phymin, phymax;
! 76:
! 77: if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY)
! 78: panic("mii_attach: phyloc and offloc specified");
! 79:
! 80: if (phyloc == MII_PHY_ANY) {
! 81: phymin = 0;
! 82: phymax = MII_NPHY - 1;
! 83: } else
! 84: phymin = phymax = phyloc;
! 85:
! 86: if ((mii->mii_flags & MIIF_INITDONE) == 0) {
! 87: LIST_INIT(&mii->mii_phys);
! 88: mii->mii_flags |= MIIF_INITDONE;
! 89: }
! 90:
! 91: for (ma.mii_phyno = phymin; ma.mii_phyno <= phymax; ma.mii_phyno++) {
! 92: /*
! 93: * Make sure we haven't already configured a PHY at this
! 94: * address. This allows mii_attach() to be called
! 95: * multiple times.
! 96: */
! 97: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
! 98: child = LIST_NEXT(child, mii_list)) {
! 99: if (child->mii_phy == ma.mii_phyno) {
! 100: /*
! 101: * Yes, there is already something
! 102: * configured at this address.
! 103: */
! 104: offset++;
! 105: continue;
! 106: }
! 107: }
! 108:
! 109: /*
! 110: * Check to see if there is a PHY at this address. Note,
! 111: * many braindead PHYs report 0/0 in their ID registers,
! 112: * so we test for media in the BMSR.
! 113: */
! 114: bmsr = (*mii->mii_readreg)(parent, ma.mii_phyno, MII_BMSR);
! 115: if (bmsr == 0 || bmsr == 0xffff ||
! 116: (bmsr & (BMSR_MEDIAMASK|BMSR_EXTSTAT)) == 0) {
! 117: /* Assume no PHY at this address. */
! 118: continue;
! 119: }
! 120:
! 121: /*
! 122: * There is a PHY at this address. If we were given an
! 123: * `offset' locator, skip this PHY if it doesn't match.
! 124: */
! 125: if (offloc != MII_OFFSET_ANY && offloc != offset) {
! 126: offset++;
! 127: continue;
! 128: }
! 129:
! 130: /*
! 131: * Extract the IDs. Braindead PHYs will be handled by
! 132: * the `ukphy' driver, as we have no ID information to
! 133: * match on.
! 134: */
! 135: ma.mii_id1 = (*mii->mii_readreg)(parent, ma.mii_phyno,
! 136: MII_PHYIDR1);
! 137: ma.mii_id2 = (*mii->mii_readreg)(parent, ma.mii_phyno,
! 138: MII_PHYIDR2);
! 139:
! 140: ma.mii_data = mii;
! 141: ma.mii_capmask = capmask;
! 142: ma.mii_flags = flags | (mii->mii_flags & MIIF_INHERIT_MASK);
! 143:
! 144: if ((child = (struct mii_softc *)config_found_sm(parent, &ma,
! 145: mii_print, mii_submatch)) != NULL) {
! 146: /*
! 147: * Link it up in the parent's MII data.
! 148: */
! 149: LIST_INSERT_HEAD(&mii->mii_phys, child, mii_list);
! 150: child->mii_offset = offset;
! 151: mii->mii_instance++;
! 152: }
! 153: offset++;
! 154: }
! 155: }
! 156:
! 157: void
! 158: mii_activate(struct mii_data *mii, enum devact act, int phyloc, int offloc)
! 159: {
! 160: struct mii_softc *child;
! 161:
! 162: if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY)
! 163: panic("mii_activate: phyloc and offloc specified");
! 164:
! 165: if ((mii->mii_flags & MIIF_INITDONE) == 0)
! 166: return;
! 167:
! 168: for (child = LIST_FIRST(&mii->mii_phys);
! 169: child != NULL; child = LIST_NEXT(child, mii_list)) {
! 170: if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) {
! 171: if (phyloc != MII_PHY_ANY &&
! 172: phyloc != child->mii_phy)
! 173: continue;
! 174: if (offloc != MII_OFFSET_ANY &&
! 175: offloc != child->mii_offset)
! 176: continue;
! 177: }
! 178: switch (act) {
! 179: case DVACT_ACTIVATE:
! 180: panic("mii_activate: DVACT_ACTIVATE");
! 181: break;
! 182:
! 183: case DVACT_DEACTIVATE:
! 184: if (config_deactivate(&child->mii_dev) != 0)
! 185: panic("%s: config_activate(%d) failed",
! 186: child->mii_dev.dv_xname, act);
! 187: }
! 188: }
! 189: }
! 190:
! 191: void
! 192: mii_detach(struct mii_data *mii, int phyloc, int offloc)
! 193: {
! 194: struct mii_softc *child, *nchild;
! 195:
! 196: if (phyloc != MII_PHY_ANY && offloc != MII_PHY_ANY)
! 197: panic("mii_detach: phyloc and offloc specified");
! 198:
! 199: if ((mii->mii_flags & MIIF_INITDONE) == 0)
! 200: return;
! 201:
! 202: for (child = LIST_FIRST(&mii->mii_phys);
! 203: child != NULL; child = nchild) {
! 204: nchild = LIST_NEXT(child, mii_list);
! 205: if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) {
! 206: if (phyloc != MII_PHY_ANY &&
! 207: phyloc != child->mii_phy)
! 208: continue;
! 209: if (offloc != MII_OFFSET_ANY &&
! 210: offloc != child->mii_offset)
! 211: continue;
! 212: }
! 213: LIST_REMOVE(child, mii_list);
! 214: (void) config_detach(&child->mii_dev, DETACH_FORCE);
! 215: }
! 216: }
! 217:
! 218: int
! 219: mii_print(void *aux, const char *pnp)
! 220: {
! 221: struct mii_attach_args *ma = aux;
! 222:
! 223: if (pnp != NULL)
! 224: printf("OUI 0x%06x model 0x%04x rev %d at %s",
! 225: MII_OUI(ma->mii_id1, ma->mii_id2), MII_MODEL(ma->mii_id2),
! 226: MII_REV(ma->mii_id2), pnp);
! 227:
! 228: printf(" phy %d", ma->mii_phyno);
! 229: return (UNCONF);
! 230: }
! 231:
! 232: int
! 233: mii_submatch(struct device *parent, void *match, void *aux)
! 234: {
! 235: struct cfdata *cf = match;
! 236: struct mii_attach_args *ma = aux;
! 237:
! 238: if (ma->mii_phyno != cf->cf_loc[MIICF_PHY] &&
! 239: cf->cf_loc[MIICF_PHY] != MIICF_PHY_DEFAULT)
! 240: return (0);
! 241:
! 242: return ((*cf->cf_attach->ca_match)(parent, cf, aux));
! 243: }
! 244:
! 245: /*
! 246: * Media changed; notify all PHYs.
! 247: */
! 248: int
! 249: mii_mediachg(struct mii_data *mii)
! 250: {
! 251: struct mii_softc *child;
! 252: int rv;
! 253:
! 254: mii->mii_media_status = 0;
! 255: mii->mii_media_active = IFM_NONE;
! 256:
! 257: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
! 258: child = LIST_NEXT(child, mii_list)) {
! 259: rv = PHY_SERVICE(child, mii, MII_MEDIACHG);
! 260: if (rv)
! 261: return (rv);
! 262: }
! 263: return (0);
! 264: }
! 265:
! 266: /*
! 267: * Call the PHY tick routines, used during autonegotiation.
! 268: */
! 269: void
! 270: mii_tick(struct mii_data *mii)
! 271: {
! 272: struct mii_softc *child;
! 273:
! 274: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
! 275: child = LIST_NEXT(child, mii_list))
! 276: (void) PHY_SERVICE(child, mii, MII_TICK);
! 277: }
! 278:
! 279: /*
! 280: * Get media status from PHYs.
! 281: */
! 282: void
! 283: mii_pollstat(struct mii_data *mii)
! 284: {
! 285: struct mii_softc *child;
! 286:
! 287: mii->mii_media_status = 0;
! 288: mii->mii_media_active = IFM_NONE;
! 289:
! 290: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
! 291: child = LIST_NEXT(child, mii_list))
! 292: (void) PHY_SERVICE(child, mii, MII_POLLSTAT);
! 293: }
! 294:
! 295: /*
! 296: * Inform the PHYs that the interface is down.
! 297: */
! 298: void
! 299: mii_down(struct mii_data *mii)
! 300: {
! 301: struct mii_softc *child;
! 302:
! 303: for (child = LIST_FIRST(&mii->mii_phys); child != NULL;
! 304: child = LIST_NEXT(child, mii_list))
! 305: (void) PHY_SERVICE(child, mii, MII_DOWN);
! 306: }
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