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