1 /* $NetBSD: mii.c,v 1.48 2008/05/05 01:37:56 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * MII bus layer, glues MII-capable network interface drivers to sharable 35 * PHY drivers. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: mii.c,v 1.48 2008/05/05 01:37:56 tsutsui Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/device.h> 43 #include <sys/systm.h> 44 #include <sys/socket.h> 45 46 #include <net/if.h> 47 #include <net/if_media.h> 48 49 #include <dev/mii/mii.h> 50 #include <dev/mii/miivar.h> 51 52 #include "locators.h" 53 54 static int mii_print(void *, const char *); 55 56 /* 57 * Helper function used by network interface drivers, attaches PHYs 58 * to the network interface driver parent. 59 */ 60 void 61 mii_attach(device_t parent, struct mii_data *mii, int capmask, 62 int phyloc, int offloc, int flags) 63 { 64 struct mii_attach_args ma; 65 struct mii_softc *child; 66 int bmsr, offset = 0; 67 int phymin, phymax; 68 int locs[MIICF_NLOCS]; 69 70 if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY) 71 panic("mii_attach: phyloc and offloc specified"); 72 73 if (phyloc == MII_PHY_ANY) { 74 phymin = 0; 75 phymax = MII_NPHY - 1; 76 } else 77 phymin = phymax = phyloc; 78 79 if ((mii->mii_flags & MIIF_INITDONE) == 0) { 80 LIST_INIT(&mii->mii_phys); 81 mii->mii_flags |= MIIF_INITDONE; 82 } 83 84 for (ma.mii_phyno = phymin; ma.mii_phyno <= phymax; ma.mii_phyno++) { 85 /* 86 * Make sure we haven't already configured a PHY at this 87 * address. This allows mii_attach() to be called 88 * multiple times. 89 */ 90 LIST_FOREACH(child, &mii->mii_phys, mii_list) { 91 if (child->mii_phy == ma.mii_phyno) { 92 /* 93 * Yes, there is already something 94 * configured at this address. 95 */ 96 offset++; 97 continue; 98 } 99 } 100 101 /* 102 * Check to see if there is a PHY at this address. Note, 103 * many braindead PHYs report 0/0 in their ID registers, 104 * so we test for media in the BMSR. 105 */ 106 bmsr = (*mii->mii_readreg)(parent, ma.mii_phyno, MII_BMSR); 107 if (bmsr == 0 || bmsr == 0xffff || 108 (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 109 /* Assume no PHY at this address. */ 110 continue; 111 } 112 113 /* 114 * There is a PHY at this address. If we were given an 115 * `offset' locator, skip this PHY if it doesn't match. 116 */ 117 if (offloc != MII_OFFSET_ANY && offloc != offset) { 118 offset++; 119 continue; 120 } 121 122 /* 123 * Extract the IDs. Braindead PHYs will be handled by 124 * the `ukphy' driver, as we have no ID information to 125 * match on. 126 */ 127 ma.mii_id1 = (*mii->mii_readreg)(parent, ma.mii_phyno, 128 MII_PHYIDR1); 129 ma.mii_id2 = (*mii->mii_readreg)(parent, ma.mii_phyno, 130 MII_PHYIDR2); 131 132 ma.mii_data = mii; 133 ma.mii_capmask = capmask; 134 ma.mii_flags = flags | (mii->mii_flags & MIIF_INHERIT_MASK); 135 136 locs[MIICF_PHY] = ma.mii_phyno; 137 138 child = device_private(config_found_sm_loc(parent, "mii", 139 locs, &ma, mii_print, config_stdsubmatch)); 140 if (child) { 141 /* 142 * Link it up in the parent's MII data. 143 */ 144 callout_init(&child->mii_nway_ch, 0); 145 LIST_INSERT_HEAD(&mii->mii_phys, child, mii_list); 146 child->mii_offset = offset; 147 mii->mii_instance++; 148 } 149 offset++; 150 } 151 } 152 153 void 154 mii_activate(struct mii_data *mii, enum devact act, int phyloc, int offloc) 155 { 156 struct mii_softc *child; 157 158 if (phyloc != MII_PHY_ANY && offloc != MII_OFFSET_ANY) 159 panic("mii_activate: phyloc and offloc specified"); 160 161 if ((mii->mii_flags & MIIF_INITDONE) == 0) 162 return; 163 164 LIST_FOREACH(child, &mii->mii_phys, mii_list) { 165 if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) { 166 if (phyloc != MII_PHY_ANY && 167 phyloc != child->mii_phy) 168 continue; 169 if (offloc != MII_OFFSET_ANY && 170 offloc != child->mii_offset) 171 continue; 172 } 173 switch (act) { 174 case DVACT_ACTIVATE: 175 panic("mii_activate: DVACT_ACTIVATE"); 176 break; 177 178 case DVACT_DEACTIVATE: 179 if (config_deactivate(child->mii_dev) != 0) 180 panic("%s: config_activate(%d) failed", 181 device_xname(child->mii_dev), act); 182 } 183 } 184 } 185 186 void 187 mii_detach(struct mii_data *mii, int phyloc, int offloc) 188 { 189 struct mii_softc *child, *nchild; 190 191 if (phyloc != MII_PHY_ANY && offloc != MII_PHY_ANY) 192 panic("mii_detach: phyloc and offloc specified"); 193 194 if ((mii->mii_flags & MIIF_INITDONE) == 0) 195 return; 196 197 for (child = LIST_FIRST(&mii->mii_phys); 198 child != NULL; child = nchild) { 199 nchild = LIST_NEXT(child, mii_list); 200 if (phyloc != MII_PHY_ANY || offloc != MII_OFFSET_ANY) { 201 if (phyloc != MII_PHY_ANY && 202 phyloc != child->mii_phy) 203 continue; 204 if (offloc != MII_OFFSET_ANY && 205 offloc != child->mii_offset) 206 continue; 207 } 208 (void)config_detach(child->mii_dev, DETACH_FORCE); 209 } 210 } 211 212 static int 213 mii_print(void *aux, const char *pnp) 214 { 215 struct mii_attach_args *ma = aux; 216 217 if (pnp != NULL) 218 aprint_normal("OUI 0x%06x model 0x%04x rev %d at %s", 219 MII_OUI(ma->mii_id1, ma->mii_id2), MII_MODEL(ma->mii_id2), 220 MII_REV(ma->mii_id2), pnp); 221 222 aprint_normal(" phy %d", ma->mii_phyno); 223 return (UNCONF); 224 } 225 226 static inline int 227 phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 228 { 229 if (!device_is_active(sc->mii_dev)) 230 return ENXIO; 231 return PHY_SERVICE(sc, mii, cmd); 232 } 233 234 int 235 mii_ifmedia_change(struct mii_data *mii) 236 { 237 return ifmedia_change(&mii->mii_media, mii->mii_ifp); 238 } 239 240 /* 241 * Media changed; notify all PHYs. 242 */ 243 int 244 mii_mediachg(struct mii_data *mii) 245 { 246 struct mii_softc *child; 247 int rv; 248 249 mii->mii_media_status = 0; 250 mii->mii_media_active = IFM_NONE; 251 252 LIST_FOREACH(child, &mii->mii_phys, mii_list) { 253 rv = phy_service(child, mii, MII_MEDIACHG); 254 if (rv) 255 return (rv); 256 } 257 return (0); 258 } 259 260 /* 261 * Call the PHY tick routines, used during autonegotiation. 262 */ 263 void 264 mii_tick(struct mii_data *mii) 265 { 266 struct mii_softc *child; 267 268 LIST_FOREACH(child, &mii->mii_phys, mii_list) 269 (void)phy_service(child, mii, MII_TICK); 270 } 271 272 /* 273 * Get media status from PHYs. 274 */ 275 void 276 mii_pollstat(struct mii_data *mii) 277 { 278 struct mii_softc *child; 279 280 mii->mii_media_status = 0; 281 mii->mii_media_active = IFM_NONE; 282 283 LIST_FOREACH(child, &mii->mii_phys, mii_list) 284 (void)phy_service(child, mii, MII_POLLSTAT); 285 } 286 287 /* 288 * Inform the PHYs that the interface is down. 289 */ 290 void 291 mii_down(struct mii_data *mii) 292 { 293 struct mii_softc *child; 294 295 LIST_FOREACH(child, &mii->mii_phys, mii_list) 296 (void)phy_service(child, mii, MII_DOWN); 297 } 298 299 static unsigned char 300 bitreverse(unsigned char x) 301 { 302 static unsigned char nibbletab[16] = { 303 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15 304 }; 305 306 return ((nibbletab[x & 15] << 4) | nibbletab[x >> 4]); 307 } 308 309 u_int 310 mii_oui(u_int id1, u_int id2) 311 { 312 u_int h; 313 314 h = (id1 << 6) | (id2 >> 10); 315 316 return ((bitreverse(h >> 16) << 16) | 317 (bitreverse((h >> 8) & 255) << 8) | 318 bitreverse(h & 255)); 319 } 320