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 1.8 2005/12/11 01:54:08 swildner 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 104 miibus_probe(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 bzero(&ma, sizeof(ma)); 115 116 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 117 /* 118 * Check to see if there is a PHY at this address. Note, 119 * many braindead PHYs report 0/0 in their ID registers, 120 * so we test for media in the BMSR. 121 */ 122 bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); 123 if (bmsr == 0 || bmsr == 0xffff || 124 (bmsr & BMSR_MEDIAMASK) == 0) { 125 /* Assume no PHY at this address. */ 126 continue; 127 } 128 129 /* 130 * Extract the IDs. Braindead PHYs will be handled by 131 * the `ukphy' driver, as we have no ID information to 132 * match on. 133 */ 134 ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, 135 MII_PHYIDR1); 136 ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, 137 MII_PHYIDR2); 138 139 ma.mii_data = mii; 140 ma.mii_capmask = capmask; 141 142 args = malloc(sizeof(struct mii_attach_args), 143 M_DEVBUF, M_INTWAIT); 144 *args = ma; 145 child = device_add_child(dev, NULL, -1); 146 device_set_ivars(child, args); 147 } 148 149 if (child == NULL) 150 return(ENXIO); 151 152 device_set_desc(dev, "MII bus"); 153 154 return(0); 155 } 156 157 int 158 miibus_attach(device_t dev) 159 { 160 void **v; 161 ifm_change_cb_t ifmedia_upd; 162 ifm_stat_cb_t ifmedia_sts; 163 struct mii_data *mii; 164 165 mii = device_get_softc(dev); 166 mii->mii_ifp = device_get_softc(device_get_parent(dev)); 167 v = device_get_ivars(dev); 168 ifmedia_upd = v[0]; 169 ifmedia_sts = v[1]; 170 ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); 171 bus_generic_attach(dev); 172 173 return(0); 174 } 175 176 int 177 miibus_detach(device_t dev) 178 { 179 struct mii_data *mii; 180 181 bus_generic_detach(dev); 182 mii = device_get_softc(dev); 183 ifmedia_removeall(&mii->mii_media); 184 mii->mii_ifp = NULL; 185 186 return(0); 187 } 188 189 static int 190 miibus_readreg(device_t dev, int phy, int 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 199 miibus_writereg(device_t dev, int phy, int reg, int 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 208 miibus_statchg(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 218 miibus_mediainit(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 241 mii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd, 242 ifm_stat_cb_t ifmedia_sts) 243 { 244 void **v; 245 int bmsr, i; 246 247 v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_INTWAIT); 248 v[0] = ifmedia_upd; 249 v[1] = ifmedia_sts; 250 *child = device_add_child(dev, "miibus", -1); 251 device_set_ivars(*child, v); 252 253 for (i = 0; i < MII_NPHY; i++) { 254 bmsr = MIIBUS_READREG(dev, i, MII_BMSR); 255 if (bmsr == 0 || bmsr == 0xffff || 256 (bmsr & BMSR_MEDIAMASK) == 0) { 257 /* Assume no PHY at this address. */ 258 continue; 259 } else 260 break; 261 } 262 263 if (i == MII_NPHY) { 264 device_delete_child(dev, *child); 265 *child = NULL; 266 return(ENXIO); 267 } 268 269 bus_generic_attach(dev); 270 271 return(0); 272 } 273 274 /* 275 * Media changed; notify all PHYs. 276 */ 277 int 278 mii_mediachg(struct mii_data *mii) 279 { 280 struct mii_softc *child; 281 int rv; 282 283 mii->mii_media_status = 0; 284 mii->mii_media_active = IFM_NONE; 285 286 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 287 child = LIST_NEXT(child, mii_list)) { 288 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 289 if (rv) 290 return (rv); 291 } 292 return (0); 293 } 294 295 /* 296 * Call the PHY tick routines, used during autonegotiation. 297 */ 298 void 299 mii_tick(struct mii_data *mii) 300 { 301 struct mii_softc *child; 302 303 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 304 child = LIST_NEXT(child, mii_list)) 305 (void) (*child->mii_service)(child, mii, MII_TICK); 306 } 307 308 /* 309 * Get media status from PHYs. 310 */ 311 void 312 mii_pollstat(struct mii_data *mii) 313 { 314 struct mii_softc *child; 315 316 mii->mii_media_status = 0; 317 mii->mii_media_active = IFM_NONE; 318 319 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 320 child = LIST_NEXT(child, mii_list)) 321 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 322 } 323 324 static moduledata_t miibus_mod = { "miibus" }; 325 326 DECLARE_MODULE(miibus, miibus_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 327 328