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 1.4 2003/08/27 09:38:31 rob 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/module.h> 54 #include <sys/bus.h> 55 56 #include <net/if.h> 57 #include <net/if_media.h> 58 59 #include "mii.h" 60 #include "miivar.h" 61 62 #include "miibus_if.h" 63 64 static int miibus_readreg (device_t, int, int); 65 static int miibus_writereg (device_t, int, int, int); 66 static void miibus_statchg (device_t); 67 static void miibus_mediainit (device_t); 68 69 static device_method_t miibus_methods[] = { 70 /* device interface */ 71 DEVMETHOD(device_probe, miibus_probe), 72 DEVMETHOD(device_attach, miibus_attach), 73 DEVMETHOD(device_detach, miibus_detach), 74 DEVMETHOD(device_shutdown, bus_generic_shutdown), 75 76 /* bus interface */ 77 DEVMETHOD(bus_print_child, bus_generic_print_child), 78 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 79 80 /* MII interface */ 81 DEVMETHOD(miibus_readreg, miibus_readreg), 82 DEVMETHOD(miibus_writereg, miibus_writereg), 83 DEVMETHOD(miibus_statchg, miibus_statchg), 84 DEVMETHOD(miibus_mediainit, miibus_mediainit), 85 86 { 0, 0 } 87 }; 88 89 devclass_t miibus_devclass; 90 91 driver_t miibus_driver = { 92 "miibus", 93 miibus_methods, 94 sizeof(struct mii_data) 95 }; 96 97 /* 98 * Helper function used by network interface drivers, attaches PHYs 99 * to the network interface driver parent. 100 */ 101 102 int miibus_probe(dev) 103 device_t dev; 104 { 105 struct mii_attach_args ma, *args; 106 struct mii_data *mii; 107 device_t child = NULL, parent; 108 int bmsr, capmask = 0xFFFFFFFF; 109 110 mii = device_get_softc(dev); 111 parent = device_get_parent(dev); 112 LIST_INIT(&mii->mii_phys); 113 114 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 115 /* 116 * Check to see if there is a PHY at this address. Note, 117 * many braindead PHYs report 0/0 in their ID registers, 118 * so we test for media in the BMSR. 119 */ 120 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 121 if (bmsr == 0 || bmsr == 0xffff || 122 (bmsr & BMSR_MEDIAMASK) == 0) { 123 /* Assume no PHY at this address. */ 124 continue; 125 } 126 127 /* 128 * Extract the IDs. Braindead PHYs will be handled by 129 * the `ukphy' driver, as we have no ID information to 130 * match on. 131 */ 132 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 133 MII_PHYIDR1); 134 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 135 MII_PHYIDR2); 136 137 ma.mii_data = mii; 138 ma.mii_capmask = capmask; 139 140 args = malloc(sizeof(struct mii_attach_args), 141 M_DEVBUF, M_NOWAIT); 142 bcopy((char *)&ma, (char *)args, sizeof(ma)); 143 child = device_add_child(dev, NULL, -1); 144 device_set_ivars(child, args); 145 } 146 147 if (child == NULL) 148 return(ENXIO); 149 150 device_set_desc(dev, "MII bus"); 151 152 return(0); 153 } 154 155 int miibus_attach(dev) 156 device_t dev; 157 { 158 void **v; 159 ifm_change_cb_t ifmedia_upd; 160 ifm_stat_cb_t ifmedia_sts; 161 struct mii_data *mii; 162 163 mii = device_get_softc(dev); 164 mii->mii_ifp = device_get_softc(device_get_parent(dev)); 165 v = device_get_ivars(dev); 166 ifmedia_upd = v[0]; 167 ifmedia_sts = v[1]; 168 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 169 bus_generic_attach(dev); 170 171 return(0); 172 } 173 174 int miibus_detach(dev) 175 device_t dev; 176 { 177 struct mii_data *mii; 178 179 bus_generic_detach(dev); 180 mii = device_get_softc(dev); 181 ifmedia_removeall(&mii->mii_media); 182 mii->mii_ifp = NULL; 183 184 return(0); 185 } 186 187 static int miibus_readreg(dev, phy, reg) 188 device_t dev; 189 int phy, reg; 190 { 191 device_t parent; 192 193 parent = device_get_parent(dev); 194 return(MIIBUS_READREG(parent, phy, reg)); 195 } 196 197 static int miibus_writereg(dev, phy, reg, data) 198 device_t dev; 199 int phy, reg, data; 200 { 201 device_t parent; 202 203 parent = device_get_parent(dev); 204 return(MIIBUS_WRITEREG(parent, phy, reg, data)); 205 } 206 207 static void miibus_statchg(dev) 208 device_t dev; 209 { 210 device_t parent; 211 212 parent = device_get_parent(dev); 213 MIIBUS_STATCHG(parent); 214 return; 215 } 216 217 static void miibus_mediainit(dev) 218 device_t dev; 219 { 220 struct mii_data *mii; 221 struct ifmedia_entry *m; 222 int media = 0; 223 224 /* Poke the parent in case it has any media of its own to add. */ 225 MIIBUS_MEDIAINIT(device_get_parent(dev)); 226 227 mii = device_get_softc(dev); 228 for (m = LIST_FIRST(&mii->mii_media.ifm_list); m != NULL; 229 m = LIST_NEXT(m, ifm_list)) { 230 media = m->ifm_media; 231 if (media == (IFM_ETHER|IFM_AUTO)) 232 break; 233 } 234 235 ifmedia_set(&mii->mii_media, media); 236 237 return; 238 } 239 240 int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts) 241 device_t dev; 242 device_t *child; 243 ifm_change_cb_t ifmedia_upd; 244 ifm_stat_cb_t ifmedia_sts; 245 { 246 void **v; 247 int bmsr, i; 248 249 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT); 250 v[0] = ifmedia_upd; 251 v[1] = ifmedia_sts; 252 *child = device_add_child(dev, "miibus", -1); 253 device_set_ivars(*child, v); 254 255 for (i = 0; i < MII_NPHY; i++) { 256 bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 257 if (bmsr == 0 || bmsr == 0xffff || 258 (bmsr & BMSR_MEDIAMASK) == 0) { 259 /* Assume no PHY at this address. */ 260 continue; 261 } else 262 break; 263 } 264 265 if (i == MII_NPHY) { 266 device_delete_child(dev, *child); 267 *child = NULL; 268 return(ENXIO); 269 } 270 271 bus_generic_attach(dev); 272 273 return(0); 274 } 275 276 /* 277 * Media changed; notify all PHYs. 278 */ 279 int 280 mii_mediachg(mii) 281 struct mii_data *mii; 282 { 283 struct mii_softc *child; 284 int rv; 285 286 mii->mii_media_status = 0; 287 mii->mii_media_active = IFM_NONE; 288 289 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 290 child = LIST_NEXT(child, mii_list)) { 291 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 292 if (rv) 293 return (rv); 294 } 295 return (0); 296 } 297 298 /* 299 * Call the PHY tick routines, used during autonegotiation. 300 */ 301 void 302 mii_tick(mii) 303 struct mii_data *mii; 304 { 305 struct mii_softc *child; 306 307 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 308 child = LIST_NEXT(child, mii_list)) 309 (void) (*child->mii_service)(child, mii, MII_TICK); 310 } 311 312 /* 313 * Get media status from PHYs. 314 */ 315 void 316 mii_pollstat(mii) 317 struct mii_data *mii; 318 { 319 struct mii_softc *child; 320 321 mii->mii_media_status = 0; 322 mii->mii_media_active = IFM_NONE; 323 324 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 325 child = LIST_NEXT(child, mii_list)) 326 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 327 } 328