1 /* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 #include "device.h" 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD: src/sys/dev/mii/mii.c,v 1.26.2.1 2006/03/17 20:17:43 glebius Exp $"); 43 44 /* 45 * MII bus layer, glues MII-capable network interface drivers to sharable 46 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, 47 * plus some NetBSD extensions. 48 */ 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/socket.h> 53 #include <sys/malloc.h> 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 57 #include <net/if.h> 58 #include <net/if_media.h> 59 #include <net/route.h> 60 61 #include <dev/mii/mii.h> 62 #include <dev/mii/miivar.h> 63 64 MODULE_VERSION(miibus, 1); 65 66 #include "miibus_if.h" 67 68 static int miibus_child_location_str(device_t bus, device_t child, char *buf, 69 size_t buflen); 70 static int miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 71 size_t buflen); 72 static int miibus_readreg(device_t, int, int); 73 static int miibus_writereg(device_t, int, int, int); 74 static void miibus_statchg(device_t); 75 static void miibus_linkchg(device_t); 76 static void miibus_mediainit(device_t); 77 78 static device_method_t miibus_methods[] = { 79 /* device interface */ 80 DEVMETHOD(device_probe, miibus_probe), 81 DEVMETHOD(device_attach, miibus_attach), 82 DEVMETHOD(device_detach, miibus_detach), 83 DEVMETHOD(device_shutdown, bus_generic_shutdown), 84 85 /* bus interface */ 86 DEVMETHOD(bus_print_child, bus_generic_print_child), 87 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 88 DEVMETHOD(bus_child_pnpinfo_str, miibus_child_pnpinfo_str), 89 DEVMETHOD(bus_child_location_str, miibus_child_location_str), 90 91 /* MII interface */ 92 DEVMETHOD(miibus_readreg, miibus_readreg), 93 DEVMETHOD(miibus_writereg, miibus_writereg), 94 DEVMETHOD(miibus_statchg, miibus_statchg), 95 DEVMETHOD(miibus_linkchg, miibus_linkchg), 96 DEVMETHOD(miibus_mediainit, miibus_mediainit), 97 98 { 0, 0 } 99 }; 100 101 devclass_t miibus_devclass; 102 103 driver_t miibus_driver = { 104 "miibus", 105 miibus_methods, 106 sizeof(struct mii_data) 107 }; 108 109 /* 110 * Helper function used by network interface drivers, attaches PHYs 111 * to the network interface driver parent. 112 */ 113 int 114 miibus_probe(device_t dev) 115 { 116 struct mii_attach_args ma, *args; 117 struct mii_data *mii; 118 device_t child = NULL, parent; 119 int bmsr, capmask = 0xFFFFFFFF; 120 121 mii = device_get_softc(dev); 122 parent = device_get_parent(dev); 123 LIST_INIT(&mii->mii_phys); 124 125 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 126 /* 127 * Check to see if there is a PHY at this address. Note, 128 * many braindead PHYs report 0/0 in their ID registers, 129 * so we test for media in the BMSR. 130 */ 131 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 132 if (bmsr == 0 || bmsr == 0xffff || 133 (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 134 /* Assume no PHY at this address. */ 135 continue; 136 } 137 138 /* 139 * Extract the IDs. Braindead PHYs will be handled by 140 * the `ukphy' driver, as we have no ID information to 141 * match on. 142 */ 143 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 144 MII_PHYIDR1); 145 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 146 MII_PHYIDR2); 147 148 ma.mii_data = mii; 149 ma.mii_capmask = capmask; 150 151 args = kernel_malloc(sizeof(struct mii_attach_args), 152 M_DEVBUF, M_NOWAIT); 153 bcopy((char *)&ma, (char *)args, sizeof(ma)); 154 child = device_add_child(dev, NULL, -1); 155 device_set_ivars(child, args); 156 } 157 158 if (child == NULL) 159 return(ENXIO); 160 161 device_set_desc(dev, "MII bus"); 162 163 return(0); 164 } 165 166 int 167 miibus_attach(device_t dev) 168 { 169 void **v; 170 ifm_change_cb_t ifmedia_upd; 171 ifm_stat_cb_t ifmedia_sts; 172 struct mii_data *mii; 173 174 mii = device_get_softc(dev); 175 /* 176 * Note that each NIC's softc must start with an ifnet pointer. 177 * XXX: EVIL HACK! 178 */ 179 mii->mii_ifp = *(struct ifnet**)device_get_softc(device_get_parent(dev)); 180 v = device_get_ivars(dev); 181 ifmedia_upd = v[0]; 182 ifmedia_sts = v[1]; 183 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 184 bus_generic_attach(dev); 185 186 return(0); 187 } 188 189 int 190 miibus_detach(device_t dev) 191 { 192 struct mii_data *mii; 193 194 bus_generic_detach(dev); 195 mii = device_get_softc(dev); 196 ifmedia_removeall(&mii->mii_media); 197 mii->mii_ifp = NULL; 198 199 return(0); 200 } 201 202 static int 203 miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 204 size_t buflen) 205 { 206 struct mii_attach_args *maa = device_get_ivars(child); 207 snprintf(buf, buflen, "oui=0x%x model=0x%x rev=0x%x", 208 MII_OUI(maa->mii_id1, maa->mii_id2), 209 MII_MODEL(maa->mii_id2), MII_REV(maa->mii_id2)); 210 return (0); 211 } 212 213 static int 214 miibus_child_location_str(device_t bus, device_t child, char *buf, 215 size_t buflen) 216 { 217 struct mii_attach_args *maa = device_get_ivars(child); 218 snprintf(buf, buflen, "phyno=%d", maa->mii_phyno); 219 return (0); 220 } 221 222 static int 223 miibus_readreg(device_t dev, int phy, int reg) 224 { 225 device_t parent; 226 227 parent = device_get_parent(dev); 228 return(MIIBUS_READREG(parent, phy, reg)); 229 } 230 231 static int 232 miibus_writereg(device_t dev, int phy, int reg, int data) 233 { 234 device_t parent; 235 236 parent = device_get_parent(dev); 237 return(MIIBUS_WRITEREG(parent, phy, reg, data)); 238 } 239 240 static void 241 miibus_statchg(device_t dev) 242 { 243 device_t parent; 244 struct mii_data *mii; 245 struct ifnet *ifp; 246 247 parent = device_get_parent(dev); 248 MIIBUS_STATCHG(parent); 249 250 mii = device_get_softc(dev); 251 252 /* 253 * Note that each NIC's softc must start with an ifnet pointer. 254 * XXX: EVIL HACK! 255 */ 256 ifp = *(struct ifnet **)device_get_softc(parent); 257 ifp->if_baudrate = ifmedia_baudrate(mii->mii_media_active); 258 return; 259 } 260 261 static void 262 miibus_linkchg(device_t dev) 263 { 264 struct mii_data *mii; 265 device_t parent; 266 int link_state; 267 268 parent = device_get_parent(dev); 269 MIIBUS_LINKCHG(parent); 270 271 mii = device_get_softc(dev); 272 273 if (mii->mii_media_status & IFM_AVALID) { 274 if (mii->mii_media_status & IFM_ACTIVE) 275 link_state = LINK_STATE_UP; 276 else 277 link_state = LINK_STATE_DOWN; 278 } else 279 link_state = LINK_STATE_UNKNOWN; 280 281 /* 282 * Note that each NIC's softc must start with an ifnet pointer. 283 * XXX: EVIL HACK! 284 */ 285 if_link_state_change(*(struct ifnet**)device_get_softc(parent), link_state); 286 } 287 288 static void 289 miibus_mediainit(device_t dev) 290 { 291 struct mii_data *mii; 292 struct ifmedia_entry *m; 293 int media = 0; 294 295 /* Poke the parent in case it has any media of its own to add. */ 296 MIIBUS_MEDIAINIT(device_get_parent(dev)); 297 298 mii = device_get_softc(dev); 299 LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) { 300 media = m->ifm_media; 301 if (media == (IFM_ETHER|IFM_AUTO)) 302 break; 303 } 304 305 ifmedia_set(&mii->mii_media, media); 306 307 return; 308 } 309 310 int 311 mii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd, 312 ifm_stat_cb_t ifmedia_sts) 313 { 314 void **v; 315 int bmsr, i; 316 317 v = kernel_malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT); 318 if (v == 0) { 319 return (ENOMEM); 320 } 321 v[0] = ifmedia_upd; 322 v[1] = ifmedia_sts; 323 *child = device_add_child(dev, "miibus", -1); 324 device_set_ivars(*child, v); 325 326 for (i = 0; i < MII_NPHY; i++) { 327 bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 328 if (bmsr == 0 || bmsr == 0xffff || 329 (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 330 /* Assume no PHY at this address. */ 331 continue; 332 } else 333 break; 334 } 335 336 if (i == MII_NPHY) { 337 device_delete_child(dev, *child); 338 *child = NULL; 339 return(ENXIO); 340 } 341 342 bus_generic_attach(dev); 343 344 return(0); 345 } 346 347 /* 348 * Media changed; notify all PHYs. 349 */ 350 int 351 mii_mediachg(struct mii_data *mii) 352 { 353 struct mii_softc *child; 354 int rv; 355 356 mii->mii_media_status = 0; 357 mii->mii_media_active = IFM_NONE; 358 359 LIST_FOREACH(child, &mii->mii_phys, mii_list) { 360 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 361 if (rv) 362 return (rv); 363 } 364 return (0); 365 } 366 367 /* 368 * Call the PHY tick routines, used during autonegotiation. 369 */ 370 void 371 mii_tick(struct mii_data *mii) 372 { 373 struct mii_softc *child; 374 375 LIST_FOREACH(child, &mii->mii_phys, mii_list) 376 (void) (*child->mii_service)(child, mii, MII_TICK); 377 } 378 379 /* 380 * Get media status from PHYs. 381 */ 382 void 383 mii_pollstat(struct mii_data *mii) 384 { 385 struct mii_softc *child; 386 387 mii->mii_media_status = 0; 388 mii->mii_media_active = IFM_NONE; 389 390 LIST_FOREACH(child, &mii->mii_phys, mii_list) 391 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 392 } 393 394 /* 395 * Inform the PHYs that the interface is down. 396 */ 397 void 398 mii_down(struct mii_data *mii) 399 { 400 struct mii_softc *child; 401 402 LIST_FOREACH(child, &mii->mii_phys, mii_list) 403 mii_phy_down(child); 404 } 405