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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /*- 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD$"); 59 60 /* 61 * driver for National Semiconductor's DP83840A ethernet 10/100 PHY 62 * Data Sheet available from www.national.com 63 */ 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/socket.h> 69 #include <sys/errno.h> 70 #include <sys/module.h> 71 #include <sys/bus.h> 72 73 #include <net/if.h> 74 #include <net/if_var.h> 75 #include <net/if_media.h> 76 77 #include <dev/mii/mii.h> 78 #include <dev/mii/miivar.h> 79 #include "miidevs.h" 80 81 #include <dev/mii/nsphyreg.h> 82 83 #include "miibus_if.h" 84 85 static int nsphy_probe(device_t); 86 static int nsphy_attach(device_t); 87 88 static device_method_t nsphy_methods[] = { 89 /* device interface */ 90 DEVMETHOD(device_probe, nsphy_probe), 91 DEVMETHOD(device_attach, nsphy_attach), 92 DEVMETHOD(device_detach, mii_phy_detach), 93 DEVMETHOD(device_shutdown, bus_generic_shutdown), 94 DEVMETHOD_END 95 }; 96 97 static devclass_t nsphy_devclass; 98 99 static driver_t nsphy_driver = { 100 "nsphy", 101 nsphy_methods, 102 sizeof(struct mii_softc) 103 }; 104 105 DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 106 107 static int nsphy_service(struct mii_softc *, struct mii_data *, int); 108 static void nsphy_status(struct mii_softc *); 109 static void nsphy_reset(struct mii_softc *); 110 111 static const struct mii_phydesc nsphys[] = { 112 MII_PHY_DESC(xxNATSEMI, DP83840), 113 MII_PHY_END 114 }; 115 116 static const struct mii_phy_funcs nsphy_funcs = { 117 nsphy_service, 118 nsphy_status, 119 nsphy_reset 120 }; 121 122 static int 123 nsphy_probe(device_t dev) 124 { 125 126 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); 127 } 128 129 static int 130 nsphy_attach(device_t dev) 131 { 132 const char *nic; 133 u_int flags; 134 135 nic = device_get_name(device_get_parent(device_get_parent(dev))); 136 flags = MIIF_NOMANPAUSE; 137 /* 138 * Am79C971 wedge when isolating all of their external PHYs. 139 */ 140 if (strcmp(nic, "pcn") == 0) 141 flags |= MIIF_NOISOLATE; 142 mii_phy_dev_attach(dev, flags, &nsphy_funcs, 1); 143 return (0); 144 } 145 146 static int 147 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 148 { 149 int reg; 150 151 switch (cmd) { 152 case MII_POLLSTAT: 153 break; 154 155 case MII_MEDIACHG: 156 reg = PHY_READ(sc, MII_NSPHY_PCR); 157 158 /* 159 * Set up the PCR to use LED4 to indicate full-duplex 160 * in both 10baseT and 100baseTX modes. 161 */ 162 reg |= PCR_LED4MODE; 163 164 /* 165 * Make sure Carrier Integrity Monitor function is 166 * disabled (normal for Node operation, but sometimes 167 * it's not set?!) 168 */ 169 reg |= PCR_CIMDIS; 170 171 /* 172 * Make sure "force link good" is set to normal mode. 173 * It's only intended for debugging. 174 */ 175 reg |= PCR_FLINK100; 176 177 /* 178 * Mystery bits which are supposedly `reserved', 179 * but we seem to need to set them when the PHY 180 * is connected to some interfaces: 181 * 182 * 0x0400 is needed for fxp 183 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 184 * (nsphy with a DP83840 chip) 185 * 0x0100 may be needed for some other card 186 */ 187 reg |= 0x0100 | 0x0400; 188 189 if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0) 190 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 191 192 mii_phy_setmedia(sc); 193 break; 194 195 case MII_TICK: 196 if (mii_phy_tick(sc) == EJUSTRETURN) 197 return (0); 198 break; 199 } 200 201 /* Update the media status. */ 202 PHY_STATUS(sc); 203 204 /* Callback if something changed. */ 205 mii_phy_update(sc, cmd); 206 return (0); 207 } 208 209 static void 210 nsphy_status(struct mii_softc *sc) 211 { 212 struct mii_data *mii = sc->mii_pdata; 213 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 214 int bmsr, bmcr, par, anlpar; 215 216 mii->mii_media_status = IFM_AVALID; 217 mii->mii_media_active = IFM_ETHER; 218 219 bmsr = PHY_READ(sc, MII_BMSR) | 220 PHY_READ(sc, MII_BMSR); 221 if (bmsr & BMSR_LINK) 222 mii->mii_media_status |= IFM_ACTIVE; 223 224 bmcr = PHY_READ(sc, MII_BMCR); 225 if (bmcr & BMCR_ISO) { 226 mii->mii_media_active |= IFM_NONE; 227 mii->mii_media_status = 0; 228 return; 229 } 230 231 if (bmcr & BMCR_LOOP) 232 mii->mii_media_active |= IFM_LOOP; 233 234 if (bmcr & BMCR_AUTOEN) { 235 /* 236 * The PAR status bits are only valid if autonegotiation 237 * has completed (or it's disabled). 238 */ 239 if ((bmsr & BMSR_ACOMP) == 0) { 240 /* Erg, still trying, I guess... */ 241 mii->mii_media_active |= IFM_NONE; 242 return; 243 } 244 245 /* 246 * Argh. The PAR doesn't seem to indicate duplex mode 247 * properly! Determine media based on link partner's 248 * advertised capabilities. 249 */ 250 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 251 anlpar = PHY_READ(sc, MII_ANAR) & 252 PHY_READ(sc, MII_ANLPAR); 253 if (anlpar & ANLPAR_TX_FD) 254 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 255 else if (anlpar & ANLPAR_T4) 256 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 257 else if (anlpar & ANLPAR_TX) 258 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 259 else if (anlpar & ANLPAR_10_FD) 260 mii->mii_media_active |= IFM_10_T|IFM_FDX; 261 else if (anlpar & ANLPAR_10) 262 mii->mii_media_active |= IFM_10_T|IFM_HDX; 263 else 264 mii->mii_media_active |= IFM_NONE; 265 if ((mii->mii_media_active & IFM_FDX) != 0) 266 mii->mii_media_active |= 267 mii_phy_flowstatus(sc); 268 return; 269 } 270 271 /* 272 * Link partner is not capable of autonegotiation. 273 * We will never be in full-duplex mode if this is 274 * the case, so reading the PAR is OK. 275 */ 276 par = PHY_READ(sc, MII_NSPHY_PAR); 277 if (par & PAR_10) 278 mii->mii_media_active |= IFM_10_T; 279 else 280 mii->mii_media_active |= IFM_100_TX; 281 mii->mii_media_active |= IFM_HDX; 282 } else 283 mii->mii_media_active = ife->ifm_media; 284 } 285 286 static void 287 nsphy_reset(struct mii_softc *sc) 288 { 289 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 290 int reg, i; 291 292 if (sc->mii_flags & MIIF_NOISOLATE) 293 reg = BMCR_RESET; 294 else 295 reg = BMCR_RESET | BMCR_ISO; 296 PHY_WRITE(sc, MII_BMCR, reg); 297 298 /* 299 * It is best to allow a little time for the reset to settle 300 * in before we start polling the BMCR again. Notably, the 301 * DP83840A manuals state that there should be a 500us delay 302 * between asserting software reset and attempting MII serial 303 * operations. Be conservative. 304 */ 305 DELAY(1000); 306 307 /* 308 * Wait another 2s for it to complete. 309 * This is only a little overkill as under normal circumstances 310 * the PHY can take up to 1s to complete reset. 311 * This is also a bit odd because after a reset, the BMCR will 312 * clear the reset bit and simply reports 0 even though the reset 313 * is not yet complete. 314 */ 315 for (i = 0; i < 1000; i++) { 316 reg = PHY_READ(sc, MII_BMCR); 317 if (reg != 0 && (reg & BMCR_RESET) == 0) 318 break; 319 DELAY(2000); 320 } 321 322 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 323 if ((ife == NULL && sc->mii_inst != 0) || 324 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 325 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 326 } 327 } 328