1 /* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 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/nsphy.c,v 1.2.2.5 2001/06/08 19:58:33 semenu Exp $ 40 */ 41 42 /* 43 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by Manuel Bouyer. 56 * 4. The name of the author may not be used to endorse or promote products 57 * derived from this software without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 63 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 64 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 65 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 68 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 73 * Data Sheet available from www.national.com 74 */ 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/socket.h> 80 #include <sys/errno.h> 81 #include <sys/module.h> 82 #include <sys/bus.h> 83 84 #include <net/if.h> 85 #include <net/if_var.h> 86 #include <net/if_media.h> 87 88 #include "mii.h" 89 #include "miivar.h" 90 #include "miidevs.h" 91 92 #include "nsphyreg.h" 93 94 #include "miibus_if.h" 95 96 static int nsphy_probe (device_t); 97 static int nsphy_attach (device_t); 98 99 static device_method_t nsphy_methods[] = { 100 /* device interface */ 101 DEVMETHOD(device_probe, nsphy_probe), 102 DEVMETHOD(device_attach, nsphy_attach), 103 DEVMETHOD(device_detach, ukphy_detach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 DEVMETHOD_END 106 }; 107 108 static const struct mii_phydesc nsphys[] = { 109 MII_PHYDESC(NATSEMI, DP83840), 110 MII_PHYDESC_NULL 111 }; 112 113 static devclass_t nsphy_devclass; 114 115 static driver_t nsphy_driver = { 116 "nsphy", 117 nsphy_methods, 118 sizeof(struct mii_softc) 119 }; 120 121 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, NULL, NULL); 122 123 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 124 static void nsphy_status(struct mii_softc *); 125 static void nsphy_reset(struct mii_softc *); 126 127 static int 128 nsphy_probe(device_t dev) 129 { 130 struct mii_attach_args *ma = device_get_ivars(dev); 131 const struct mii_phydesc *mpd; 132 133 mpd = mii_phy_match(ma, nsphys); 134 if (mpd != NULL) { 135 device_set_desc(dev, mpd->mpd_name); 136 return (0); 137 } 138 return (ENXIO); 139 } 140 141 static int 142 nsphy_attach(device_t dev) 143 { 144 struct mii_softc *sc; 145 struct mii_attach_args *ma; 146 struct mii_data *mii; 147 148 sc = device_get_softc(dev); 149 ma = device_get_ivars(dev); 150 mii_softc_init(sc, ma); 151 sc->mii_dev = device_get_parent(dev); 152 mii = device_get_softc(sc->mii_dev); 153 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 154 155 sc->mii_inst = mii->mii_instance; 156 sc->mii_service = nsphy_service; 157 sc->mii_reset = nsphy_reset; 158 sc->mii_pdata = mii; 159 160 #ifdef foo 161 /* 162 * i82557 wedges if all of its PHYs are isolated! 163 */ 164 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 165 "fxp") == 0 && mii->mii_instance == 0) 166 #endif 167 168 sc->mii_flags |= MIIF_NOISOLATE; 169 mii->mii_instance++; 170 171 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 172 173 #if 0 174 /* Can't do this on the i82557! */ 175 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 176 BMCR_ISO); 177 #endif 178 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 179 MII_MEDIA_100_TX); 180 181 nsphy_reset(sc); 182 183 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 184 device_printf(dev, " "); 185 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 186 kprintf("no media present"); 187 else 188 mii_phy_add_media(sc); 189 kprintf("\n"); 190 #undef ADD 191 192 MIIBUS_MEDIAINIT(sc->mii_dev); 193 return(0); 194 } 195 196 static int 197 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 198 { 199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 200 int reg; 201 202 switch (cmd) { 203 case MII_POLLSTAT: 204 /* 205 * If we're not polling our PHY instance, just return. 206 */ 207 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 208 return (0); 209 break; 210 211 case MII_MEDIACHG: 212 /* 213 * If the media indicates a different PHY instance, 214 * isolate ourselves. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 217 reg = PHY_READ(sc, MII_BMCR); 218 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 219 return (0); 220 } 221 222 /* 223 * If the interface is not up, don't do anything. 224 */ 225 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 226 break; 227 228 reg = PHY_READ(sc, MII_NSPHY_PCR); 229 230 /* 231 * Set up the PCR to use LED4 to indicate full-duplex 232 * in both 10baseT and 100baseTX modes. 233 */ 234 reg |= PCR_LED4MODE; 235 236 /* 237 * Make sure Carrier Intgrity Monitor function is 238 * disabled (normal for Node operation, but sometimes 239 * it's not set?!) 240 */ 241 reg |= PCR_CIMDIS; 242 243 /* 244 * Make sure "force link good" is set to normal mode. 245 * It's only intended for debugging. 246 */ 247 reg |= PCR_FLINK100; 248 249 /* 250 * Mystery bits which are supposedly `reserved', 251 * but we seem to need to set them when the PHY 252 * is connected to some interfaces: 253 * 254 * 0x0400 is needed for fxp 255 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 256 * (nsphy with a DP83840 chip) 257 * 0x0100 may be needed for some other card 258 */ 259 reg |= PCR_CONGCTRL | PCR_TXREADYSEL; 260 261 if (strcmp(device_get_name(device_get_parent(sc->mii_dev)), 262 "fxp") == 0) 263 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 264 265 mii_phy_set_media(sc); 266 break; 267 268 case MII_TICK: 269 /* 270 * If we're not currently selected, just return. 271 */ 272 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 273 return (0); 274 275 if (mii_phy_tick(sc) == EJUSTRETURN) 276 return (0); 277 break; 278 } 279 280 /* Update the media status. */ 281 nsphy_status(sc); 282 283 /* Callback if something changed. */ 284 mii_phy_update(sc, cmd); 285 return (0); 286 } 287 288 static void 289 nsphy_status(struct mii_softc *sc) 290 { 291 struct mii_data *mii = sc->mii_pdata; 292 int bmsr, bmcr, par, anlpar; 293 294 mii->mii_media_status = IFM_AVALID; 295 mii->mii_media_active = IFM_ETHER; 296 297 bmsr = PHY_READ(sc, MII_BMSR) | 298 PHY_READ(sc, MII_BMSR); 299 if (bmsr & BMSR_LINK) 300 mii->mii_media_status |= IFM_ACTIVE; 301 302 bmcr = PHY_READ(sc, MII_BMCR); 303 if (bmcr & BMCR_ISO) { 304 mii->mii_media_active |= IFM_NONE; 305 mii->mii_media_status = 0; 306 return; 307 } 308 309 if (bmcr & BMCR_LOOP) 310 mii->mii_media_active |= IFM_LOOP; 311 312 if (bmcr & BMCR_AUTOEN) { 313 /* 314 * The PAR status bits are only valid of autonegotiation 315 * has completed (or it's disabled). 316 */ 317 if ((bmsr & BMSR_ACOMP) == 0) { 318 /* Erg, still trying, I guess... */ 319 mii->mii_media_active |= IFM_NONE; 320 return; 321 } 322 323 /* 324 * Argh. The PAR doesn't seem to indicate duplex mode 325 * properly! Determine media based on link partner's 326 * advertised capabilities. 327 */ 328 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 329 anlpar = PHY_READ(sc, MII_ANAR) & 330 PHY_READ(sc, MII_ANLPAR); 331 if (anlpar & ANLPAR_T4) 332 mii->mii_media_active |= IFM_100_T4; 333 else if (anlpar & ANLPAR_TX_FD) 334 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 335 else if (anlpar & ANLPAR_TX) 336 mii->mii_media_active |= IFM_100_TX; 337 else if (anlpar & ANLPAR_10_FD) 338 mii->mii_media_active |= IFM_10_T|IFM_FDX; 339 else if (anlpar & ANLPAR_10) 340 mii->mii_media_active |= IFM_10_T; 341 else 342 mii->mii_media_active |= IFM_NONE; 343 return; 344 } 345 346 /* 347 * Link partner is not capable of autonegotiation. 348 * We will never be in full-duplex mode if this is 349 * the case, so reading the PAR is OK. 350 */ 351 par = PHY_READ(sc, MII_NSPHY_PAR); 352 if (par & PAR_10) 353 mii->mii_media_active |= IFM_10_T; 354 else 355 mii->mii_media_active |= IFM_100_TX; 356 #if 0 357 if (par & PAR_FDX) 358 mii->mii_media_active |= IFM_FDX; 359 #endif 360 } else 361 mii->mii_media_active |= mii->mii_media.ifm_cur->ifm_media; 362 } 363 364 static void 365 nsphy_reset(struct mii_softc *sc) 366 { 367 int anar; 368 369 mii_phy_reset(sc); 370 anar = PHY_READ(sc, MII_ANAR); 371 anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR)); 372 PHY_WRITE(sc, MII_ANAR, anar); 373 } 374