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 * $FreeBSD: src/sys/dev/mii/mii.c,v 1.6.2.2 2002/08/19 16:56:33 ambrisko Exp $ 40 * $DragonFly: src/sys/dev/netif/mii_layer/mii.c,v 1.6 2004/04/07 05:45:28 dillon Exp $ 41 */ 42 43 /* 44 * MII bus layer, glues MII-capable network interface drivers to sharable 45 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, 46 * plus some NetBSD extensions. 47 */ 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/socket.h> 52 #include <sys/malloc.h> 53 #include <sys/kernel.h> 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 57 #include <net/if.h> 58 #include <net/if_media.h> 59 60 #include "mii.h" 61 #include "miivar.h" 62 63 #include "miibus_if.h" 64 65 static int miibus_readreg (device_t, int, int); 66 static int miibus_writereg (device_t, int, int, int); 67 static void miibus_statchg (device_t); 68 static void miibus_mediainit (device_t); 69 70 static device_method_t miibus_methods[] = { 71 /* device interface */ 72 DEVMETHOD(device_probe, miibus_probe), 73 DEVMETHOD(device_attach, miibus_attach), 74 DEVMETHOD(device_detach, miibus_detach), 75 DEVMETHOD(device_shutdown, bus_generic_shutdown), 76 77 /* bus interface */ 78 DEVMETHOD(bus_print_child, bus_generic_print_child), 79 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 80 81 /* MII interface */ 82 DEVMETHOD(miibus_readreg, miibus_readreg), 83 DEVMETHOD(miibus_writereg, miibus_writereg), 84 DEVMETHOD(miibus_statchg, miibus_statchg), 85 DEVMETHOD(miibus_mediainit, miibus_mediainit), 86 87 { 0, 0 } 88 }; 89 90 devclass_t miibus_devclass; 91 92 driver_t miibus_driver = { 93 "miibus", 94 miibus_methods, 95 sizeof(struct mii_data) 96 }; 97 98 /* 99 * Helper function used by network interface drivers, attaches PHYs 100 * to the network interface driver parent. 101 */ 102 103 int miibus_probe(dev) 104 device_t dev; 105 { 106 struct mii_attach_args ma, *args; 107 struct mii_data *mii; 108 device_t child = NULL, parent; 109 int bmsr, capmask = 0xFFFFFFFF; 110 111 mii = device_get_softc(dev); 112 parent = device_get_parent(dev); 113 LIST_INIT(&mii->mii_phys); 114 115 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 116 /* 117 * Check to see if there is a PHY at this address. Note, 118 * many braindead PHYs report 0/0 in their ID registers, 119 * so we test for media in the BMSR. 120 */ 121 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 122 if (bmsr == 0 || bmsr == 0xffff || 123 (bmsr & BMSR_MEDIAMASK) == 0) { 124 /* Assume no PHY at this address. */ 125 continue; 126 } 127 128 /* 129 * Extract the IDs. Braindead PHYs will be handled by 130 * the `ukphy' driver, as we have no ID information to 131 * match on. 132 */ 133 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 134 MII_PHYIDR1); 135 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 136 MII_PHYIDR2); 137 138 ma.mii_data = mii; 139 ma.mii_capmask = capmask; 140 141 args = malloc(sizeof(struct mii_attach_args), 142 M_DEVBUF, M_INTWAIT); 143 bcopy((char *)&ma, (char *)args, sizeof(ma)); 144 child = device_add_child(dev, NULL, -1); 145 device_set_ivars(child, args); 146 } 147 148 if (child == NULL) 149 return(ENXIO); 150 151 device_set_desc(dev, "MII bus"); 152 153 return(0); 154 } 155 156 int miibus_attach(dev) 157 device_t dev; 158 { 159 void **v; 160 ifm_change_cb_t ifmedia_upd; 161 ifm_stat_cb_t ifmedia_sts; 162 struct mii_data *mii; 163 164 mii = device_get_softc(dev); 165 mii->mii_ifp = device_get_softc(device_get_parent(dev)); 166 v = device_get_ivars(dev); 167 ifmedia_upd = v[0]; 168 ifmedia_sts = v[1]; 169 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 170 bus_generic_attach(dev); 171 172 return(0); 173 } 174 175 int miibus_detach(dev) 176 device_t dev; 177 { 178 struct mii_data *mii; 179 180 bus_generic_detach(dev); 181 mii = device_get_softc(dev); 182 ifmedia_removeall(&mii->mii_media); 183 mii->mii_ifp = NULL; 184 185 return(0); 186 } 187 188 static int miibus_readreg(dev, phy, reg) 189 device_t dev; 190 int phy, reg; 191 { 192 device_t parent; 193 194 parent = device_get_parent(dev); 195 return(MIIBUS_READREG(parent, phy, reg)); 196 } 197 198 static int miibus_writereg(dev, phy, reg, data) 199 device_t dev; 200 int phy, reg, data; 201 { 202 device_t parent; 203 204 parent = device_get_parent(dev); 205 return(MIIBUS_WRITEREG(parent, phy, reg, data)); 206 } 207 208 static void miibus_statchg(dev) 209 device_t dev; 210 { 211 device_t parent; 212 213 parent = device_get_parent(dev); 214 MIIBUS_STATCHG(parent); 215 return; 216 } 217 218 static void miibus_mediainit(dev) 219 device_t dev; 220 { 221 struct mii_data *mii; 222 struct ifmedia_entry *m; 223 int media = 0; 224 225 /* Poke the parent in case it has any media of its own to add. */ 226 MIIBUS_MEDIAINIT(device_get_parent(dev)); 227 228 mii = device_get_softc(dev); 229 for (m = LIST_FIRST(&mii->mii_media.ifm_list); m != NULL; 230 m = LIST_NEXT(m, ifm_list)) { 231 media = m->ifm_media; 232 if (media == (IFM_ETHER|IFM_AUTO)) 233 break; 234 } 235 236 ifmedia_set(&mii->mii_media, media); 237 238 return; 239 } 240 241 int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts) 242 device_t dev; 243 device_t *child; 244 ifm_change_cb_t ifmedia_upd; 245 ifm_stat_cb_t ifmedia_sts; 246 { 247 void **v; 248 int bmsr, i; 249 250 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_INTWAIT); 251 v[0] = ifmedia_upd; 252 v[1] = ifmedia_sts; 253 *child = device_add_child(dev, "miibus", -1); 254 device_set_ivars(*child, v); 255 256 for (i = 0; i < MII_NPHY; i++) { 257 bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 258 if (bmsr == 0 || bmsr == 0xffff || 259 (bmsr & BMSR_MEDIAMASK) == 0) { 260 /* Assume no PHY at this address. */ 261 continue; 262 } else 263 break; 264 } 265 266 if (i == MII_NPHY) { 267 device_delete_child(dev, *child); 268 *child = NULL; 269 return(ENXIO); 270 } 271 272 bus_generic_attach(dev); 273 274 return(0); 275 } 276 277 /* 278 * Media changed; notify all PHYs. 279 */ 280 int 281 mii_mediachg(mii) 282 struct mii_data *mii; 283 { 284 struct mii_softc *child; 285 int rv; 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 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 293 if (rv) 294 return (rv); 295 } 296 return (0); 297 } 298 299 /* 300 * Call the PHY tick routines, used during autonegotiation. 301 */ 302 void 303 mii_tick(mii) 304 struct mii_data *mii; 305 { 306 struct mii_softc *child; 307 308 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 309 child = LIST_NEXT(child, mii_list)) 310 (void) (*child->mii_service)(child, mii, MII_TICK); 311 } 312 313 /* 314 * Get media status from PHYs. 315 */ 316 void 317 mii_pollstat(mii) 318 struct mii_data *mii; 319 { 320 struct mii_softc *child; 321 322 mii->mii_media_status = 0; 323 mii->mii_media_active = IFM_NONE; 324 325 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 326 child = LIST_NEXT(child, mii_list)) 327 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 328 } 329 330 static moduledata_t miibus_mod = { "miibus" }; 331 332 DECLARE_MODULE(miibus, miibus_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 333 334