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 40 #include "device.h" 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD: src/sys/dev/mii/mii.c,v 1.26.2.1 2006/03/17 20:17:43 glebius Exp $"); 44 45 /* 46 * MII bus layer, glues MII-capable network interface drivers to sharable 47 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, 48 * plus some NetBSD extensions. 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/socket.h> 54 #include <sys/malloc.h> 55 #include <sys/module.h> 56 #include <sys/bus.h> 57 58 #include <net/if.h> 59 #include <net/if_media.h> 60 #include <net/route.h> 61 62 #include <dev/mii/mii.h> 63 #include <dev/mii/miivar.h> 64 65 MODULE_VERSION(miibus, 1); 66 67 #include "miibus_if.h" 68 69 static int miibus_child_location_str(device_t bus, device_t child, char *buf, 70 size_t buflen); 71 static int miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 72 size_t buflen); 73 static int miibus_readreg(device_t, int, int); 74 static int miibus_writereg(device_t, int, int, int); 75 static void miibus_statchg(device_t); 76 static void miibus_linkchg(device_t); 77 static void miibus_mediainit(device_t); 78 79 static device_method_t miibus_methods[] = { 80 /* device interface */ 81 DEVMETHOD(device_probe, miibus_probe), 82 DEVMETHOD(device_attach, miibus_attach), 83 DEVMETHOD(device_detach, miibus_detach), 84 DEVMETHOD(device_shutdown, bus_generic_shutdown), 85 86 /* bus interface */ 87 DEVMETHOD(bus_print_child, bus_generic_print_child), 88 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 89 DEVMETHOD(bus_child_pnpinfo_str, miibus_child_pnpinfo_str), 90 DEVMETHOD(bus_child_location_str, miibus_child_location_str), 91 92 /* MII interface */ 93 DEVMETHOD(miibus_readreg, miibus_readreg), 94 DEVMETHOD(miibus_writereg, miibus_writereg), 95 DEVMETHOD(miibus_statchg, miibus_statchg), 96 DEVMETHOD(miibus_linkchg, miibus_linkchg), 97 DEVMETHOD(miibus_mediainit, miibus_mediainit), 98 99 { 0, 0 } 100 }; 101 102 devclass_t miibus_devclass; 103 104 driver_t miibus_driver = { 105 "miibus", 106 miibus_methods, 107 sizeof(struct mii_data) 108 }; 109 110 /* 111 * Helper function used by network interface drivers, attaches PHYs 112 * to the network interface driver parent. 113 */ 114 int 115 miibus_probe(device_t dev) 116 { 117 struct mii_attach_args ma, *args; 118 struct mii_data *mii; 119 device_t child = NULL, parent; 120 int bmsr, capmask = 0xFFFFFFFF; 121 122 mii = device_get_softc(dev); 123 parent = device_get_parent(dev); 124 LIST_INIT(&mii->mii_phys); 125 126 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 127 /* 128 * Check to see if there is a PHY at this address. Note, 129 * many braindead PHYs report 0/0 in their ID registers, 130 * so we test for media in the BMSR. 131 */ 132 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 133 if (bmsr == 0 || bmsr == 0xffff || 134 (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 135 /* Assume no PHY at this address. */ 136 continue; 137 } 138 139 /* 140 * Extract the IDs. Braindead PHYs will be handled by 141 * the `ukphy' driver, as we have no ID information to 142 * match on. 143 */ 144 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 145 MII_PHYIDR1); 146 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 147 MII_PHYIDR2); 148 149 ma.mii_data = mii; 150 ma.mii_capmask = capmask; 151 152 args = kernel_malloc(sizeof(struct mii_attach_args), 153 M_DEVBUF, M_NOWAIT); 154 bcopy((char *)&ma, (char *)args, sizeof(ma)); 155 child = device_add_child(dev, NULL, -1); 156 device_set_ivars(child, args); 157 } 158 159 if (child == NULL) 160 return(ENXIO); 161 162 device_set_desc(dev, "MII bus"); 163 164 return(0); 165 } 166 167 int 168 miibus_attach(device_t dev) 169 { 170 void **v; 171 ifm_change_cb_t ifmedia_upd; 172 ifm_stat_cb_t ifmedia_sts; 173 struct mii_data *mii; 174 175 mii = device_get_softc(dev); 176 177 mii->mii_ifp = NETDEV(device_get_parent(dev))->ifp; 178 v = device_get_ivars(dev); 179 ifmedia_upd = v[0]; 180 ifmedia_sts = v[1]; 181 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 182 bus_generic_attach(dev); 183 184 return(0); 185 } 186 187 int 188 miibus_detach(device_t dev) 189 { 190 struct mii_data *mii; 191 192 bus_generic_detach(dev); 193 mii = device_get_softc(dev); 194 ifmedia_removeall(&mii->mii_media); 195 mii->mii_ifp = NULL; 196 197 return(0); 198 } 199 200 static int 201 miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 202 size_t buflen) 203 { 204 struct mii_attach_args *maa = device_get_ivars(child); 205 snprintf(buf, buflen, "oui=0x%x model=0x%x rev=0x%x", 206 MII_OUI(maa->mii_id1, maa->mii_id2), 207 MII_MODEL(maa->mii_id2), MII_REV(maa->mii_id2)); 208 return (0); 209 } 210 211 static int 212 miibus_child_location_str(device_t bus, device_t child, char *buf, 213 size_t buflen) 214 { 215 struct mii_attach_args *maa = device_get_ivars(child); 216 snprintf(buf, buflen, "phyno=%d", maa->mii_phyno); 217 return (0); 218 } 219 220 static int 221 miibus_readreg(device_t dev, int phy, int reg) 222 { 223 device_t parent; 224 225 parent = device_get_parent(dev); 226 return(MIIBUS_READREG(parent, phy, reg)); 227 } 228 229 static int 230 miibus_writereg(device_t dev, int phy, int reg, int data) 231 { 232 device_t parent; 233 234 parent = device_get_parent(dev); 235 return(MIIBUS_WRITEREG(parent, phy, reg, data)); 236 } 237 238 static void 239 miibus_statchg(device_t dev) 240 { 241 device_t parent; 242 struct mii_data *mii; 243 struct ifnet *ifp; 244 245 parent = device_get_parent(dev); 246 MIIBUS_STATCHG(parent); 247 248 mii = device_get_softc(dev); 249 250 ifp = NETDEV(parent)->ifp; 251 ifp->if_baudrate = ifmedia_baudrate(mii->mii_media_active); 252 return; 253 } 254 255 static void 256 miibus_linkchg(device_t dev) 257 { 258 struct mii_data *mii; 259 device_t parent; 260 int link_state; 261 262 parent = device_get_parent(dev); 263 MIIBUS_LINKCHG(parent); 264 265 mii = device_get_softc(dev); 266 267 if (mii->mii_media_status & IFM_AVALID) { 268 if (mii->mii_media_status & IFM_ACTIVE) 269 link_state = LINK_STATE_UP; 270 else 271 link_state = LINK_STATE_DOWN; 272 } else 273 link_state = LINK_STATE_UNKNOWN; 274 275 if_link_state_change(NETDEV(parent)->ifp, link_state); 276 } 277 278 static void 279 miibus_mediainit(device_t dev) 280 { 281 struct mii_data *mii; 282 struct ifmedia_entry *m; 283 int media = 0; 284 285 /* Poke the parent in case it has any media of its own to add. */ 286 MIIBUS_MEDIAINIT(device_get_parent(dev)); 287 288 mii = device_get_softc(dev); 289 LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) { 290 media = m->ifm_media; 291 if (media == (IFM_ETHER|IFM_AUTO)) 292 break; 293 } 294 295 ifmedia_set(&mii->mii_media, media); 296 297 return; 298 } 299 300 int 301 mii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd, 302 ifm_stat_cb_t ifmedia_sts) 303 { 304 void **v; 305 int bmsr, i; 306 307 v = kernel_malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT); 308 if (v == 0) { 309 return (ENOMEM); 310 } 311 v[0] = ifmedia_upd; 312 v[1] = ifmedia_sts; 313 *child = device_add_child(dev, "miibus", -1); 314 device_set_ivars(*child, v); 315 316 for (i = 0; i < MII_NPHY; i++) { 317 bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 318 if (bmsr == 0 || bmsr == 0xffff || 319 (bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) { 320 /* Assume no PHY at this address. */ 321 continue; 322 } else 323 break; 324 } 325 326 if (i == MII_NPHY) { 327 device_delete_child(dev, *child); 328 *child = NULL; 329 return(ENXIO); 330 } 331 332 bus_generic_attach(dev); 333 334 return(0); 335 } 336 337 /* 338 * Media changed; notify all PHYs. 339 */ 340 int 341 mii_mediachg(struct mii_data *mii) 342 { 343 struct mii_softc *child; 344 int rv; 345 346 mii->mii_media_status = 0; 347 mii->mii_media_active = IFM_NONE; 348 349 LIST_FOREACH(child, &mii->mii_phys, mii_list) { 350 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 351 if (rv) 352 return (rv); 353 } 354 return (0); 355 } 356 357 /* 358 * Call the PHY tick routines, used during autonegotiation. 359 */ 360 void 361 mii_tick(struct mii_data *mii) 362 { 363 struct mii_softc *child; 364 365 LIST_FOREACH(child, &mii->mii_phys, mii_list) 366 (void) (*child->mii_service)(child, mii, MII_TICK); 367 } 368 369 /* 370 * Get media status from PHYs. 371 */ 372 void 373 mii_pollstat(struct mii_data *mii) 374 { 375 struct mii_softc *child; 376 377 mii->mii_media_status = 0; 378 mii->mii_media_active = IFM_NONE; 379 380 LIST_FOREACH(child, &mii->mii_phys, mii_list) 381 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 382 } 383 384 /* 385 * Inform the PHYs that the interface is down. 386 */ 387 void 388 mii_down(struct mii_data *mii) 389 { 390 struct mii_softc *child; 391 392 LIST_FOREACH(child, &mii->mii_phys, mii_list) 393 mii_phy_down(child); 394 } 395