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_media.h> 75 76#include <dev/mii/mii.h> 77#include <dev/mii/miivar.h> 78#include "miidevs.h" 79 80#include <dev/mii/nsphyreg.h> 81 82#include "miibus_if.h" 83 84static int nsphy_probe(device_t); 85static int nsphy_attach(device_t); 86 87static device_method_t nsphy_methods[] = { 88 /* device interface */ 89 DEVMETHOD(device_probe, nsphy_probe), 90 DEVMETHOD(device_attach, nsphy_attach), 91 DEVMETHOD(device_detach, mii_phy_detach), 92 DEVMETHOD(device_shutdown, bus_generic_shutdown), 93 DEVMETHOD_END 94}; 95 96static devclass_t nsphy_devclass; 97 98static driver_t nsphy_driver = { 99 "nsphy", 100 nsphy_methods, 101 sizeof(struct mii_softc) 102}; 103 104DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0); 105 106static int nsphy_service(struct mii_softc *, struct mii_data *, int); 107static void nsphy_status(struct mii_softc *); 108static void nsphy_reset(struct mii_softc *); 109 110static const struct mii_phydesc nsphys[] = { 111 MII_PHY_DESC(xxNATSEMI, DP83840), 112 MII_PHY_END 113}; 114 115static const struct mii_phy_funcs nsphy_funcs = { 116 nsphy_service, 117 nsphy_status, 118 nsphy_reset 119}; 120 121static int 122nsphy_probe(device_t dev) 123{ 124 125 return (mii_phy_dev_probe(dev, nsphys, BUS_PROBE_DEFAULT)); 126} 127 128static int 129nsphy_attach(device_t dev) 130{ 131 const char *nic; 132 u_int flags; 133 134 nic = device_get_name(device_get_parent(device_get_parent(dev))); 135 flags = MIIF_NOMANPAUSE; 136 /* 137 * Am79C971 wedge when isolating all of their external PHYs. 138 */ 139 if (strcmp(nic, "pcn") == 0) 140 flags |= MIIF_NOISOLATE; 141 mii_phy_dev_attach(dev, flags, &nsphy_funcs, 1); 142 return (0); 143} 144 145static int 146nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 147{ 148 int reg; 149 150 switch (cmd) { 151 case MII_POLLSTAT: 152 break; 153 154 case MII_MEDIACHG: 155 /* 156 * If the interface is not up, don't do anything. 157 */ 158 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 159 break; 160 161 reg = PHY_READ(sc, MII_NSPHY_PCR); 162 163 /* 164 * Set up the PCR to use LED4 to indicate full-duplex 165 * in both 10baseT and 100baseTX modes. 166 */ 167 reg |= PCR_LED4MODE; 168 169 /* 170 * Make sure Carrier Integrity Monitor function is 171 * disabled (normal for Node operation, but sometimes 172 * it's not set?!) 173 */ 174 reg |= PCR_CIMDIS; 175 176 /* 177 * Make sure "force link good" is set to normal mode. 178 * It's only intended for debugging. 179 */ 180 reg |= PCR_FLINK100; 181 182 /* 183 * Mystery bits which are supposedly `reserved', 184 * but we seem to need to set them when the PHY 185 * is connected to some interfaces: 186 * 187 * 0x0400 is needed for fxp 188 * (Intel EtherExpress Pro 10+/100B, 82557 chip) 189 * (nsphy with a DP83840 chip) 190 * 0x0100 may be needed for some other card 191 */ 192 reg |= 0x0100 | 0x0400; 193 194 if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0) 195 PHY_WRITE(sc, MII_NSPHY_PCR, reg); 196 197 mii_phy_setmedia(sc); 198 break; 199 200 case MII_TICK: 201 if (mii_phy_tick(sc) == EJUSTRETURN) 202 return (0); 203 break; 204 } 205 206 /* Update the media status. */ 207 PHY_STATUS(sc); 208 209 /* Callback if something changed. */ 210 mii_phy_update(sc, cmd); 211 return (0); 212} 213 214static void 215nsphy_status(struct mii_softc *sc) 216{ 217 struct mii_data *mii = sc->mii_pdata; 218 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 219 int bmsr, bmcr, par, anlpar; 220 221 mii->mii_media_status = IFM_AVALID; 222 mii->mii_media_active = IFM_ETHER; 223 224 bmsr = PHY_READ(sc, MII_BMSR) | 225 PHY_READ(sc, MII_BMSR); 226 if (bmsr & BMSR_LINK) 227 mii->mii_media_status |= IFM_ACTIVE; 228 229 bmcr = PHY_READ(sc, MII_BMCR); 230 if (bmcr & BMCR_ISO) { 231 mii->mii_media_active |= IFM_NONE; 232 mii->mii_media_status = 0; 233 return; 234 } 235 236 if (bmcr & BMCR_LOOP) 237 mii->mii_media_active |= IFM_LOOP; 238 239 if (bmcr & BMCR_AUTOEN) { 240 /* 241 * The PAR status bits are only valid if autonegotiation 242 * has completed (or it's disabled). 243 */ 244 if ((bmsr & BMSR_ACOMP) == 0) { 245 /* Erg, still trying, I guess... */ 246 mii->mii_media_active |= IFM_NONE; 247 return; 248 } 249 250 /* 251 * Argh. The PAR doesn't seem to indicate duplex mode 252 * properly! Determine media based on link partner's 253 * advertised capabilities. 254 */ 255 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 256 anlpar = PHY_READ(sc, MII_ANAR) & 257 PHY_READ(sc, MII_ANLPAR); 258 if (anlpar & ANLPAR_TX_FD) 259 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 260 else if (anlpar & ANLPAR_T4) 261 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 262 else if (anlpar & ANLPAR_TX) 263 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 264 else if (anlpar & ANLPAR_10_FD) 265 mii->mii_media_active |= IFM_10_T|IFM_FDX; 266 else if (anlpar & ANLPAR_10) 267 mii->mii_media_active |= IFM_10_T|IFM_HDX; 268 else 269 mii->mii_media_active |= IFM_NONE; 270 if ((mii->mii_media_active & IFM_FDX) != 0) 271 mii->mii_media_active |= 272 mii_phy_flowstatus(sc); 273 return; 274 } 275 276 /* 277 * Link partner is not capable of autonegotiation. 278 * We will never be in full-duplex mode if this is 279 * the case, so reading the PAR is OK. 280 */ 281 par = PHY_READ(sc, MII_NSPHY_PAR); 282 if (par & PAR_10) 283 mii->mii_media_active |= IFM_10_T; 284 else 285 mii->mii_media_active |= IFM_100_TX; 286 mii->mii_media_active |= IFM_HDX; 287 } else 288 mii->mii_media_active = ife->ifm_media; 289} 290 291static void 292nsphy_reset(struct mii_softc *sc) 293{ 294 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 295 int reg, i; 296 297 if (sc->mii_flags & MIIF_NOISOLATE) 298 reg = BMCR_RESET; 299 else 300 reg = BMCR_RESET | BMCR_ISO; 301 PHY_WRITE(sc, MII_BMCR, reg); 302 303 /* 304 * It is best to allow a little time for the reset to settle 305 * in before we start polling the BMCR again. Notably, the 306 * DP83840A manuals state that there should be a 500us delay 307 * between asserting software reset and attempting MII serial 308 * operations. Be conservative. 309 */ 310 DELAY(1000); 311 312 /* 313 * Wait another 2s for it to complete. 314 * This is only a little overkill as under normal circumstances 315 * the PHY can take up to 1s to complete reset. 316 * This is also a bit odd because after a reset, the BMCR will 317 * clear the reset bit and simply reports 0 even though the reset 318 * is not yet complete. 319 */ 320 for (i = 0; i < 1000; i++) { 321 reg = PHY_READ(sc, MII_BMCR); 322 if (reg != 0 && (reg & BMCR_RESET) == 0) 323 break; 324 DELAY(2000); 325 } 326 327 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { 328 if ((ife == NULL && sc->mii_inst != 0) || 329 (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) 330 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 331 } 332} 333